Add instructions for firmware development

- Correct MHz and Voltage Scaling
- Hide Analog Out related GUI Elements
- Change default amplitude and frequency values

README.md

@@ -0,0 +1,21 @@
+# Firmware for the Sinara 8462 Fast-Servo
+## Building
+### Reproducible build with Nix
+1. Run `nix build .#packages.armv7l-linux.fast-servo-sd-image` to build the sd card image.
+2. Run `nix develop` to build a dev shell to access the GUI.
+
+### Flashing
+1. Plug in your SD card to your computer and run `lsblk` to locate SD card
+2. If there are any partitions on the SD card, run `umount <mount point>` all the related mount points.
+3. Run `sudo dd if=<path to the SD Card Image> of=/dev/<SD Card Device Name in lsblk> bs=4M status=progress oflag=sync`
+4. Eject the SD Card before removal
+
+### Usage
+1. Make sure the onboard DIP Switch is in the following condition.
+    - EN: OFF
+    - MODE: ON
+2. Install the SD Card, power up the board via the power jack or PoE and plug in the RJ45 Ethernet cable.
+3. Wait for all the front panel LEDs except the termination status LEDs to turn off. It can take a minutes or two for first boot. If it does not boot up, try to flash the SD Card again.
+4. Run `ssh <fast servo ip address> -p 3030` to ssh into fast-servo and run `linien-server run` to start the linien server.
+5. In the dev shell, run `linien` to launch the GUI. Add new device. Username is `root` and it does not take any password to log in. You leave the password field with any text.
+6. Select the newly added device and click connect in the GUI to connect and start the GUI.

fast-servo/autolock_pipeline.patch

@@ -0,0 +1,66 @@
+diff --git a/gateware/logic/autolock.py b/gateware/logic/autolock.py
+index a6dc764..1a8407f 100644
+--- a/gateware/logic/autolock.py
++++ b/gateware/logic/autolock.py
+@@ -148,14 +148,17 @@ class RobustAutolock(Module, AutoCSR):
+         final_waited_for = Signal(bits_for(N_points))
+ 
+         # this is the signal that's used for detecting peaks
+-        sum_diff = Signal((len(self.sum_diff_calculator.output), True))
+-        abs_sum_diff = Signal.like(sum_diff)
++        self.sum_diff = Signal((len(self.sum_diff_calculator.output), True))
++        abs_sum_diff = Signal.like(self.sum_diff)
+         self.comb += [
+             self.sum_diff_calculator.writing_data_now.eq(self.writing_data_now),
+             self.sum_diff_calculator.restart.eq(self.at_start),
+             self.sum_diff_calculator.input.eq(self.input),
+             self.sum_diff_calculator.delay_value.eq(self.time_scale.storage),
+-            sum_diff.eq(self.sum_diff_calculator.output),
++        ]
++
++        self.sync += [
++            self.sum_diff.eq(self.sum_diff_calculator.output),
+         ]
+ 
+         # has this signal at the moment the same sign as the peak we are looking for?
+@@ -168,16 +171,17 @@ class RobustAutolock(Module, AutoCSR):
+         all_instructions_triggered = Signal()
+ 
+         self.comb += [
+-            sign_equal.eq((sum_diff > 0) == (current_peak_height > 0)),
+-            If(sum_diff >= 0, abs_sum_diff.eq(sum_diff)).Else(
+-                abs_sum_diff.eq(-1 * sum_diff)
++            sign_equal.eq((self.sum_diff > 0) == (current_peak_height > 0)),
++            If(self.sum_diff >= 0, abs_sum_diff.eq(self.sum_diff)).Else(
++                abs_sum_diff.eq(-1 * self.sum_diff)
+             ),
+             If(
+                 current_peak_height >= 0,
+                 abs_current_peak_height.eq(current_peak_height),
+             ).Else(abs_current_peak_height.eq(-1 * current_peak_height)),
+             over_threshold.eq(abs_sum_diff >= abs_current_peak_height),
+-            waited_long_enough.eq(waited_for > current_wait_for),
++            # HACK: To compensate the lock position output for the pipeline delay
++            waited_long_enough.eq((waited_for >= current_wait_for - 1) & (waited_for != 2 ** bits_for(N_points) - 1) & (current_wait_for - 1 != 2 ** bits_for(N_points) - 1)),
+             all_instructions_triggered.eq(
+                 self.current_instruction_idx >= self.N_instructions.storage
+             ),
+@@ -190,7 +194,7 @@ class RobustAutolock(Module, AutoCSR):
+         self.sync += [
+             If(
+                 self.at_start,
+-                waited_for.eq(0),
++                waited_for.eq(-1),
+                 # fpga robust autolock algorithm registeres trigger events delayed.
+                 # Therefore, we give it a head start for `final_waited_for`
+                 final_waited_for.eq(ROBUST_AUTOLOCK_FPGA_DELAY),
+@@ -213,7 +217,8 @@ class RobustAutolock(Module, AutoCSR):
+                         self.current_instruction_idx.eq(
+                             self.current_instruction_idx + 1
+                         ),
+-                        waited_for.eq(0),
++                        # HACK: To compensate the lock position output for the pipeline delay
++                        waited_for.eq(-1),
+                     ).Else(waited_for.eq(waited_for + 1)),
+                 ),
+                 If(

fast-servo/fast-servo.dts

@@ -1,7 +1,7 @@
-# 0 "my_dts/system-top.dts"
+# 0 "system-top.dts"
 # 0 "<built-in>"
 # 0 "<command-line>"
-# 1 "my_dts/system-top.dts"
+# 1 "system-top.dts"
 
 
 
@@ -10,8 +10,8 @@
 
 
 /dts-v1/;
-# 1 "my_dts/zynq-7000.dtsi" 1
-# 15 "my_dts/zynq-7000.dtsi"
+# 1 "zynq-7000.dtsi" 1
+# 15 "zynq-7000.dtsi"
 / {
  #address-cells = <1>;
  #size-cells = <1>;
@@ -564,8 +564,8 @@
   };
  };
 };
-# 10 "my_dts/system-top.dts" 2
-# 1 "my_dts/pcw.dtsi" 1
+# 10 "system-top.dts" 2
+# 1 "pcw.dtsi" 1
 
 
 
@@ -641,7 +641,48 @@
  fclk-enable = <0x0>;
  ps-clk-frequency = <33333333>;
 };
-# 11 "my_dts/system-top.dts" 2
+# 11 "system-top.dts" 2
+# 1 "system-user.dtsi" 1
+
+
+&spi0 {
+    is-decoded-cs = <1>;
+    num-cs = <4>;
+
+    spidev@1 {
+        compatible = "rohm,dh2228fv";
+        spi-max-frequency = <50000000>;
+        reg = <1>;
+    };
+
+    spidev@2 {
+        compatible = "rohm,dh2228fv";
+        spi-max-frequency = <50000000>;
+        reg = <2>;
+    };
+
+    spidev@3 {
+        compatible = "rohm,dh2228fv";
+        spi-max-frequency = <50000000>;
+        reg = <3>;
+    };
+
+    spidev@4 {
+        compatible = "rohm,dh2228fv";
+        spi-max-frequency = <50000000>;
+        reg = <4>;
+    };
+};
+
+&spi1 {
+
+    spidev@0 {
+        compatible = "rohm,dh2228fv";
+        spi-max-frequency = <50000000>;
+        reg = <0>;
+    };
+};
+# 12 "system-top.dts" 2
 / {
  model = "Sinara Fast Servo board";
  chosen {

fast-servo/iir_pipeline.patch

@@ -0,0 +1,13 @@
+diff --git a/gateware/logic/iir.py b/gateware/logic/iir.py
+index 2380dd7..60bfeb7 100644
+--- a/gateware/logic/iir.py
++++ b/gateware/logic/iir.py
+@@ -89,7 +89,7 @@ class Iir(Filter):
+                 zr = Signal.like(z)
+                 self.sync += zr.eq(z)
+                 z = Signal.like(zr)
+-                self.comb += z.eq(zr + signal * c[coeff])
++                self.sync += z.eq(zr + signal * c[coeff])
+             self.comb += y_next.eq(z)
+             self.latency.value = Constant(order + 1)
+             self.interval.value = Constant(1)

fast-servo/linien-client-ssh-port-change.patch

@@ -0,0 +1,31 @@
+diff --git a/linien-client/linien_client/deploy.py b/linien-client/linien_client/deploy.py
+index df6683f..7355cc3 100644
+--- a/linien-client/linien_client/deploy.py
++++ b/linien-client/linien_client/deploy.py
+@@ -34,7 +34,7 @@ logger.setLevel(logging.DEBUG)
+ 
+ 
+ def read_remote_version(
+-    device: Device, ssh_port: int = 22, out_stream=sys.stdout
++    device: Device, ssh_port: int = 3030, out_stream=sys.stdout
+ ) -> str:
+     """Read the remote version of linien."""
+ 
+@@ -62,7 +62,7 @@ def read_remote_version(
+ 
+ 
+ def start_remote_server(
+-    device: Device, ssh_port: int = 22, out_stream=sys.stdout
++    device: Device, ssh_port: int = 3030, out_stream=sys.stdout
+ ) -> None:
+     """Start the remote linien server."""
+ 
+@@ -102,7 +102,7 @@ def start_remote_server(
+ 
+ 
+ def install_remote_server(
+-    device: Device, ssh_port: int = 22, out_stream=sys.stdout
++    device: Device, ssh_port: int = 3030, out_stream=sys.stdout
+ ) -> None:
+     """Install the remote linien server."""
+ 

fast-servo/linien-common-fast-servo-hardware-specific.patch

@@ -0,0 +1,15 @@
+diff --git a/linien-common/linien_common/common.py b/linien-common/linien_common/common.py
+index 854d776..a310dbe 100644
+--- a/linien-common/linien_common/common.py
++++ b/linien-common/linien_common/common.py
+@@ -25,8 +25,8 @@ from typing import Dict, Iterable, List, Tuple, Union
+ import numpy as np
+ from scipy.signal import correlate, resample
+ 
+-MHz = 0x10000000 / 8
+-Vpp = ((1 << 14) - 1) / 4
++MHz = 0x10000000 / 8 * 125 / 100
++Vpp = (1 << 14) * 0.5 / 0.425 - 1
+ # conversion of bits to V
+ ANALOG_OUT_V = 1.8 / ((2**15) - 1)
+ 

fast-servo/linien-fast-servo-gateware.patch

@@ -1,38 +0,0 @@
-# diff from elhep/Fast-Servo-Firmmware commit ID 7fae40c:
-# https://github.com/elhep/Fast-Servo-Firmware/commit/7fae40c0f872a91218be378f8289b98b1e366729
-# Fix for migen add_source deprecation and removed xilinx bootgen command
-# .bin file is being generated by bit2bin.py from Linien repository
-# https://github.com/linien-org/linien/blob/master/gateware/bit2bin.py 
-
-diff --git a/fast_servo/gateware/fast_servo_platform.py b/fast_servo/gateware/fast_servo_platform.py
-index 13b4aa3..89a8103 100644
---- a/fast_servo/gateware/fast_servo_platform.py
-+++ b/fast_servo/gateware/fast_servo_platform.py
-@@ -324,7 +324,12 @@ class Platform(XilinxPlatform):
-         self.ps7_config = ps7_config
- 
-         verilog_sources = os.listdir(verilog_dir)
--        self.add_sources(verilog_dir, *verilog_sources)
-+        self.add_source_dir(verilog_dir)
-+
-+    def build(self, *args, **kwargs):
-+        build_dir = kwargs.get('build_dir', 'build')
-+        self.copy_sources(build_dir)
-+        super().build(*args, **kwargs)
- 
-     def do_finalize(self, fragment):
-         try:
-diff --git a/fast_servo/gateware/fast_servo_soc.py b/fast_servo/gateware/fast_servo_soc.py
-index 02128f5..abfc583 100644
---- a/fast_servo/gateware/fast_servo_soc.py
-+++ b/fast_servo/gateware/fast_servo_soc.py
-@@ -282,9 +282,3 @@ if __name__ == "__main__":
-     os.chdir(os.path.join(root_path, build_dir))
-     with open(f"{build_name}.bif", "w") as f:
-         f.write(f"all:\n{{\n\t{build_name}.bit\n}}")
--    
--    cmd = f"bootgen -image {build_name}.bif -arch zynq -process_bitstream bin -w on".split(" ")
--    subprocess.run(cmd)
--
--    
--

fast-servo/linien-gateware-fast-servo.patch

@@ -1,3 +1,42 @@
+# diff from elhep/Fast-Servo-Firmmware commit ID 7fae40c:
+# https://github.com/elhep/Fast-Servo-Firmware/commit/7fae40c0f872a91218be378f8289b98b1e366729
+# Fix for migen add_source deprecation and removed xilinx bootgen command
+# .bin file is being generated by bit2bin.py from Linien repository
+# https://github.com/linien-org/linien/blob/master/gateware/bit2bin.py 
+
+diff --git a/fast_servo/gateware/fast_servo_platform.py b/fast_servo/gateware/fast_servo_platform.py
+index 13b4aa3..89a8103 100644
+--- a/fast_servo/gateware/fast_servo_platform.py
++++ b/fast_servo/gateware/fast_servo_platform.py
+@@ -324,7 +324,12 @@ class Platform(XilinxPlatform):
+         self.ps7_config = ps7_config
+ 
+         verilog_sources = os.listdir(verilog_dir)
+-        self.add_sources(verilog_dir, *verilog_sources)
++        self.add_source_dir(verilog_dir)
++
++    def build(self, *args, **kwargs):
++        build_dir = kwargs.get('build_dir', 'build')
++        self.copy_sources(build_dir)
++        super().build(*args, **kwargs)
+ 
+     def do_finalize(self, fragment):
+         try:
+diff --git a/fast_servo/gateware/fast_servo_soc.py b/fast_servo/gateware/fast_servo_soc.py
+index 02128f5..abfc583 100644
+--- a/fast_servo/gateware/fast_servo_soc.py
++++ b/fast_servo/gateware/fast_servo_soc.py
+@@ -282,9 +282,3 @@ if __name__ == "__main__":
+     os.chdir(os.path.join(root_path, build_dir))
+     with open(f"{build_name}.bif", "w") as f:
+         f.write(f"all:\n{{\n\t{build_name}.bit\n}}")
+-    
+-    cmd = f"bootgen -image {build_name}.bif -arch zynq -process_bitstream bin -w on".split(" ")
+-    subprocess.run(cmd)
+-
+-    
+-
+
 # diff between linen-org/linien commit ID 93f1f50:
 # https://github.com/linien-org/linien/commit/93f1f50ebd86fe3314cab5a549462d0fcbf6a658
 # and elhep/linien commit ID b73eea0:
@@ -16,41 +55,27 @@ index b3f3683..98c6e51 100644
  
    - repo: https://github.com/pycqa/isort
      rev: 5.12.0
-diff --git a/gateware/build_fpga_image.sh b/gateware/build_fpga_image.sh
-index f822402..be7401c 100644
---- a/gateware/build_fpga_image.sh
-+++ b/gateware/build_fpga_image.sh
-@@ -16,4 +16,9 @@ export PATH=$VIVADOPATH:$PATH
- 
- rm linien-server/linien_server/gateware.bin -f
- # run with -m option to avoid errors related to relative imports without breaking pytest
--python3 -m gateware.fpga_image_helper
-\ No newline at end of file
-+
-+if [ -z "$1" ]; then
-+    python3 -m gateware.fpga_image_helper
-+else
-+    python3 -m gateware.fpga_image_helper -p $1
-+fi
-\ No newline at end of file
 diff --git a/gateware/fpga_image_helper.py b/gateware/fpga_image_helper.py
-index 6c34429..a0b12d0 100644
+index c3e20e7..ebead1d 100644
 --- a/gateware/fpga_image_helper.py
 +++ b/gateware/fpga_image_helper.py
-@@ -1,5 +1,6 @@
- # Copyright 2014-2015 Robert Jördens <jordens@gmail.com>
- # Copyright 2018-2022 Benjamin Wiegand <benjamin.wiegand@physik.hu-berlin.de>
-+# Copyright 2023 Jakub Matyas <jakubk.m@gmail.com>
- #
+@@ -1,6 +1,7 @@
  # This file is part of Linien and based on redpid.
  #
-@@ -23,14 +24,16 @@ from pathlib import Path
- REPO_ROOT_DIR = Path(__file__).resolve().parents[1]
+ # Copyright (C) 2016-2024 Linien Authors (https://github.com/linien-org/linien#license)
++# Copyright 2023 Jakub Matyas <jakubk.m@gmail.com>
+ #
+ # Linien is free software: you can redistribute it and/or modify
+ # it under the terms of the GNU General Public License as published by
+@@ -20,16 +21,18 @@
+ from pathlib import Path
  
  from .bit2bin import bit2bin
 -from .hw_platform import Platform
 -from .linien_module import RootModule
  
+ REPO_ROOT_DIR = Path(__file__).resolve().parents[1]
+ 
  
  def py_csrconstants(map, fil):
      fil.write("csr_constants = {\n")
@@ -65,7 +90,7 @@ index 6c34429..a0b12d0 100644
      fil.write("}\n\n")
  
  
-@@ -52,26 +55,49 @@ def get_csrmap(banks):
+@@ -51,26 +54,51 @@ def get_csrmap(banks):
  def py_csrmap(it, fil):
      fil.write("csr = {\n")
      for reg in it:
@@ -84,7 +109,7 @@ index 6c34429..a0b12d0 100644
 -    platform = Platform()
 -    root = RootModule(platform)
 +    import argparse
- 
++
 +    parser = argparse.ArgumentParser()
 +    parser.add_argument("-p", "--platform", default=None)
 +    args = parser.parse_args()
@@ -103,10 +128,11 @@ index 6c34429..a0b12d0 100644
 +        root = LinienFastServo(platform)
 +    else:
 +        raise ValueError("Unknown platform")
-+
++    
 +    platform.add_source_dir(REPO_ROOT_DIR / "gateware" / "verilog")
 +    build_dir = REPO_ROOT_DIR / "gateware" / "build"
 +    platform.build(root, build_name="top", build_dir=build_dir, run=True)
+ 
      with open(
          REPO_ROOT_DIR / "linien-server" / "linien_server" / "csrmap.py", "w"
      ) as fil:
@@ -117,7 +143,7 @@ index 6c34429..a0b12d0 100644
          py_csrmap(csr, fil)
          fil.write("states = {}\n".format(repr(root.linien.state_names)))
          fil.write("signals = {}\n".format(repr(root.linien.signal_names)))
--
+ 
 -    platform.add_source_dir(REPO_ROOT_DIR / "gateware" / "verilog")
 -    build_dir = REPO_ROOT_DIR / "gateware" / "build"
 -    platform.build(root, build_name="top", build_dir=build_dir)
@@ -128,14 +154,14 @@ diff --git a/gateware/linien_module.py b/gateware/linien_module.py
 index 16ca186..6905ac0 100644
 --- a/gateware/linien_module.py
 +++ b/gateware/linien_module.py
-@@ -2,6 +2,7 @@
- # Copyright 2018-2022 Benjamin Wiegand <benjamin.wiegand@physik.hu-berlin.de>
- # Copyright 2021-2023 Bastian Leykauf <leykauf@physik.hu-berlin.de>
- # Copyright 2022 Christian Freier <christian.freier@nomadatomics.com>
-+# Copyright 2023 Jakub Matyas <jakubk.m@gmail.com>
- #
+@@ -1,6 +1,7 @@
  # This file is part of Linien and based on redpid.
  #
+ # Copyright (C) 2016-2024 Linien Authors (https://github.com/linien-org/linien#license)
++# Copyright 2023 Jakub Matyas <jakubk.m@gmail.com>
+ #
+ # Linien is free software: you can redistribute it and/or modify
+ # it under the terms of the GNU General Public License as published by
 @@ -36,19 +37,13 @@ from misoc.interconnect.csr import AutoCSR, CSRStatus, CSRStorage
  from .logic.autolock import FPGAAutolock
  from .logic.chains import FastChain, SlowChain, cross_connect

fast-servo/linien-gateware/README.md

@@ -1,5 +1,5 @@
 ## Source Repository
-Files in this directory were copied from [elhep/Fast-Servo-Frimware](https://github.com/elhep/Fast-Servo-Firmware/tree/master/fast_servo/gateware).
+Files in this directory were copied from [elhep/Fast-Servo-Firmware](https://github.com/elhep/Fast-Servo-Firmware/tree/master/fast_servo/gateware).
 
 ## Commit ID
 The files were copied from commit ID [7fae40c](https://github.com/elhep/Fast-Servo-Firmware/commit/7fae40c0f872a91218be378f8289b98b1e366729).

fast-servo/linien-gateware/cores/adc.py

@@ -20,13 +20,15 @@
 from migen import *
 from migen.genlib.cdc import MultiReg
 from misoc.interconnect.csr import AutoCSR, CSRStatus, CSRStorage
+from misoc.interconnect.stream import AsyncFIFO
 
 
-class _CRG(Module):
+class CRG(Module):
     def __init__(self, platform, dco_clk, dco_freq=200e6):
         self.clock_domains.cd_dco = ClockDomain()
         self.clock_domains.cd_dco2x = ClockDomain()
         self.clock_domains.cd_dco2d = ClockDomain()
+        self.clock_domains.cd_dco2d_45_degree = ClockDomain()
         dco_clk_p, dco_clk_n = dco_clk
 
         dco_clk_buf = Signal()
@@ -41,59 +43,83 @@ class _CRG(Module):
         clk_dco = Signal()
         clk_dco2x = Signal()
         clk_dco2d = Signal()
+        clk_dco2d_45_degree = Signal()
+        mmcm_ps_psdone = Signal()
+
         self.locked = Signal()
+        self.mmcm_rst = Signal()
+        self.ddr_clk_phase_shift_en = Signal()
+        self.ddr_clk_phase_incdec = Signal()
 
         platform.add_period_constraint(dco_clk_p, 1e9 / dco_freq)
         self.specials += [
             Instance(
-                "PLLE2_BASE",
+                "MMCME2_ADV",
                 p_BANDWIDTH="OPTIMIZED",
                 p_DIVCLK_DIVIDE=1,
                 p_CLKFBOUT_PHASE=0.0,
-                p_CLKFBOUT_MULT=4,  # VCO @ 800 MHz
+                p_CLKFBOUT_MULT_F=4,  # VCO @ 800 MHz
                 p_CLKIN1_PERIOD=(1e9 / dco_freq),
                 p_REF_JITTER1=0.01,
                 p_STARTUP_WAIT="FALSE",
                 i_CLKIN1=dco_clk_buf,
                 i_PWRDWN=0,
-                i_RST=ResetSignal("sys"),
+                i_RST=ResetSignal("sys") | self.mmcm_rst,
                 i_CLKFBIN=clk_feedback_buf,
                 o_CLKFBOUT=clk_feedback,
-                p_CLKOUT0_DIVIDE=4,
-                p_CLKOUT0_PHASE=0.0,
+
+                p_CLKOUT0_USE_FINE_PS="TRUE",
+                p_CLKOUT0_DIVIDE_F=8,
+                p_CLKOUT0_PHASE=45.0,
                 p_CLKOUT0_DUTY_CYCLE=0.5,
-                o_CLKOUT0=clk_dco,  # 200 MHz <- dco_clk
+                o_CLKOUT0=clk_dco2d_45_degree,  # 100 MHz <- dco_clk / 2 = 200 MHz / 2
+                o_LOCKED=self.locked,
+
                 p_CLKOUT1_DIVIDE=2,
                 p_CLKOUT1_PHASE=0.0,
                 p_CLKOUT1_DUTY_CYCLE=0.5,
                 o_CLKOUT1=clk_dco2x,  # 400 MHZ <- 2 * dco_clk = 2*200 MHz
+                
                 p_CLKOUT2_DIVIDE=8,
                 p_CLKOUT2_PHASE=0.0,
                 p_CLKOUT2_DUTY_CYCLE=0.5,
                 o_CLKOUT2=clk_dco2d,  # 100 MHz <- dco_clk / 2 = 200 MHz / 2
-                o_LOCKED=self.locked,
+                
+                p_CLKOUT3_DIVIDE=4,
+                p_CLKOUT3_PHASE=0.0,
+                p_CLKOUT3_DUTY_CYCLE=0.5,
+                o_CLKOUT3=clk_dco,  # 200 MHz <- dco_clk
+
+                i_PSCLK=ClockSignal(),
+                i_PSEN=self.ddr_clk_phase_shift_en,
+                i_PSINCDEC=self.ddr_clk_phase_incdec,
+                o_PSDONE=mmcm_ps_psdone,
             )
         ]
 
         self.specials += Instance("BUFG", i_I=clk_feedback, o_O=clk_feedback_buf)
         self.specials += Instance("BUFG", i_I=clk_dco, o_O=self.cd_dco.clk)
         self.specials += Instance("BUFG", i_I=clk_dco2d, o_O=self.cd_dco2d.clk)
+        self.specials += Instance("BUFG", i_I=clk_dco2d_45_degree, o_O=self.cd_dco2d_45_degree.clk)
         self.specials += Instance("BUFG", i_I=clk_dco2x, o_O=self.cd_dco2x.clk)
 
+        # Ignore dco2d to mmcm dco_clk path created by SoC's rst.
+        platform.add_false_path_constraints(self.cd_dco2d.clk, dco_clk_buf)
+        self.specials += Instance("FD", p_INIT=1, i_D=~self.locked, i_C=self.cd_dco2d.clk, o_Q=self.cd_dco2d.rst)
 
 class ADC(Module, AutoCSR):
     def __init__(self, platform, dco_freq=200e6):
         adc_pads = platform.request("adc")
         afe_pads = platform.request("adc_afe")
 
-        self.frame_csr = CSRStatus(4)
+        self.frame_csr = CSRStatus(5)
         self.data_ch0 = CSRStatus(16)
         self.data_ch1 = CSRStatus(16)
 
         self.tap_delay = CSRStorage(5)
         self.bitslip_csr = CSRStorage(1)
 
-        self.afe_ctrl = CSRStorage(4)
+        self.afe_ctrl = CSRStorage(7)
 
         tap_delay_val = Signal(5)
         bitslip = Signal()
@@ -105,7 +131,17 @@ class ADC(Module, AutoCSR):
         ch2_shdn = Signal()
 
         self.data_out = [Signal(16, reset_less=True), Signal(16, reset_less=True)]
+        self.data_out_cdc = [Signal(16, reset_less=True), Signal(16, reset_less=True)]
         self.s_frame = Signal(4)
+        self.s_frame_cdc = Signal(4)
+
+        self.submodules.cdc_fifo = ClockDomainsRenamer({"write": "dco2d", "read": "sys"})(AsyncFIFO([("data", 36)], 4))
+        self.comb += [
+            self.cdc_fifo.sink.data.eq(Cat(self.data_out_cdc[0], self.data_out_cdc[1], self.s_frame_cdc)),
+            self.cdc_fifo.sink.stb.eq(~ResetSignal("dco2d")),
+            Cat(self.data_out[0], self.data_out[1], self.s_frame).eq(self.cdc_fifo.source.data),
+            self.cdc_fifo.source.ack.eq(~ResetSignal("sys")),
+        ]
 
         ###
 
@@ -117,11 +153,14 @@ class ADC(Module, AutoCSR):
             # dco_clk.n.eq(adc_pads.dco_n),
             tap_delay_val.eq(self.tap_delay.storage),
             Cat(ch1_gain_x10, ch2_gain_x10, ch1_shdn, ch2_shdn).eq(
-                self.afe_ctrl.storage
+                self.afe_ctrl.storage[0:4]
             ),
         ]
 
-        self.submodules._crg = _CRG(platform, dco_clk, dco_freq)
+        self.submodules.crg = CRG(platform, dco_clk, dco_freq)
+        self.comb += self.afe_ctrl.storage[4].eq(self.crg.mmcm_rst)
+        self.comb += self.afe_ctrl.storage[5].eq(self.crg.ddr_clk_phase_shift_en)
+        self.comb += self.afe_ctrl.storage[6].eq(self.crg.ddr_clk_phase_incdec)
 
         self.specials += MultiReg(self.bitslip_csr.re, bitslip_re_dco_2d, "dco2d")
         self.sync.dco2d += [
@@ -129,7 +168,8 @@ class ADC(Module, AutoCSR):
         ]
 
         self.comb += [
-            self.frame_csr.status.eq(self.s_frame),
+            self.frame_csr.status[0:4].eq(self.s_frame[0:4]),
+            self.frame_csr.status[4].eq(self.crg.locked),
             self.data_ch0.status.eq(self.data_out[0]),
             self.data_ch1.status.eq(self.data_out[1]),
         ]
@@ -146,7 +186,7 @@ class ADC(Module, AutoCSR):
 
         self.specials += Instance(
             "LTC2195",
-            i_rst_in=ResetSignal("sys"),
+            i_rst_in=ResetSignal("dco2d"),
             i_clk200=ClockSignal("idelay"),
             i_DCO=ClockSignal("dco"),
             i_DCO_2D=ClockSignal("dco2d"),
@@ -158,9 +198,9 @@ class ADC(Module, AutoCSR):
             i_D1_in_n=adc_pads.data1_n,
             i_bitslip=bitslip,
             i_delay_val=tap_delay_val,
-            o_ADC0_out=self.data_out[1],        # LANES swapped on hardware
-            o_ADC1_out=self.data_out[0],
-            o_FR_out=self.s_frame,
+            o_ADC0_out=self.data_out_cdc[1],        # LANES swapped on hardware
+            o_ADC1_out=self.data_out_cdc[0],
+            o_FR_out=self.s_frame_cdc,
             o_o_data_from_pins=dummy,
             o_idelay_rdy=dummy_idelay_rdy,
         )

fast-servo/linien-gateware/cores/dac.py

@@ -20,6 +20,7 @@
 from migen import *
 from misoc.interconnect.csr import AutoCSR, CSRStorage
 from migen.genlib.io import DDROutput
+from misoc.interconnect.stream import AsyncFIFO
 
 
 class DAC(Module, AutoCSR):
@@ -38,37 +39,51 @@ class DAC(Module, AutoCSR):
         output_data_ch1 = Signal(14)
 
         self.data_in = [Signal(14, reset_less=True), Signal(14, reset_less=True)]
+        self.data_in_csr = [Signal(14, reset_less=True), Signal(14, reset_less=True)]
+        
+        self.data_in_cdc = [Signal(14, reset_less=True), Signal(14, reset_less=True)]
+        self.data_in_csr_cdc = [Signal(14, reset_less=True), Signal(14, reset_less=True)]
         platform.add_period_constraint(dac_pads.dclkio, 10.0)
 
+        self.submodules.cdc_fifo = ClockDomainsRenamer({"write": "sys", "read": "dco2d"})(AsyncFIFO([("data", 56)], 4))
+        self.comb += [
+            self.data_in_csr[0].eq(self.output_value_ch0.storage), 
+            self.data_in_csr[1].eq(self.output_value_ch1.storage),
+            self.cdc_fifo.sink.data.eq(Cat(self.data_in[0], self.data_in[1], self.data_in_csr[0], self.data_in_csr[1])),
+            self.cdc_fifo.sink.stb.eq(~ResetSignal("sys")),
+            Cat(self.data_in_cdc[0], self.data_in_cdc[1], self.data_in_csr_cdc[0], self.data_in_csr_cdc[1]).eq(self.cdc_fifo.source.data),
+            self.cdc_fifo.source.ack.eq(~ResetSignal("dco2d")),
+        ]
+
         self.comb += [
             Cat(manual_override, ch0_pd, ch1_pd).eq(self.dac_ctrl.storage),
-            dac_pads.rst.eq(ResetSignal("sys")),
+            dac_pads.rst.eq(ResetSignal("dco2d")),
             dac_afe_pads.ch1_pd_n.eq(~ch0_pd),
             dac_afe_pads.ch2_pd_n.eq(~ch1_pd),
             output_data_ch0.eq(
-                Mux(manual_override, self.output_value_ch0.storage, self.data_in[0])
+                Mux(manual_override, self.data_in_csr_cdc[0], self.data_in_cdc[0])
             ),
             output_data_ch1.eq(
-                Mux(manual_override, self.output_value_ch1.storage, self.data_in[1])
+                Mux(manual_override, self.data_in_csr_cdc[1], self.data_in_cdc[1])
             ),
         ]
 
-        # data
-        for lane in range(14):
-            self.specials += DDROutput(
-                i1 = output_data_ch0[lane], 
-                i2 = output_data_ch1[lane], 
-                o = dac_pads.data[lane], 
-                clk = ClockSignal("dco2d")
-            )
-        
-        # clock forwarding
-        self.specials += DDROutput(
-            i1 = 0b0,
-            i2 = 0b1,
-            o = dac_pads.dclkio,
-            clk = ClockSignal("dco2d"),
-        )
+        self.specials += [
+            Instance("ODDR", 
+                i_C=ClockSignal("dco2d"), 
+                i_CE=~ResetSignal("dco2d"), 
+                i_D1=output_data_ch0[lane], # DDR CLK Rising Edge
+                i_D2=output_data_ch1[lane], # DDR CLK Falling Edge
+                o_Q=dac_pads.data[lane],
+                p_DDR_CLK_EDGE="SAME_EDGE") 
+            for lane in range(14)]
+        self.specials += Instance("ODDR", 
+                i_C=ClockSignal("dco2d_45_degree"), 
+                i_CE=~ResetSignal("dco2d"), 
+                i_D1=0, 
+                i_D2=1, 
+                o_Q=dac_pads.dclkio,
+                p_DDR_CLK_EDGE="SAME_EDGE")
 
 
 class AUX_DAC_CTRL(Module, AutoCSR):

fast-servo/linien-gateware/fast_servo_soc.py

@@ -147,6 +147,7 @@ class BaseSoC(PS7, AutoCSR):
         # self.add_main_adc(platform)
         self.submodules.adc = ADC(platform)
         self.csr_devices.append("adc")
+        platform.add_false_path_constraints(self.crg.cd_sys.clk, self.adc.crg.cd_dco2d.clk)
 
         # self.add_main_dac(platform)
         self.submodules.dac = DAC(platform)

fast-servo/linien-gui-fast-servo-hardware-specific.patch

@@ -0,0 +1,227 @@
+diff --git a/linien-gui/linien_gui/ui/general_panel.ui b/linien_gui/ui/general_panel.ui
+index 7cf74a7..6c2bd45 100644
+--- a/linien-gui/linien_gui/ui/general_panel.ui
++++ b/linien_gui/ui/general_panel.ui
+@@ -128,11 +128,6 @@
+             <string>FAST OUT 2</string>
+            </property>
+           </item>
+-          <item>
+-           <property name="text">
+-            <string>ANALOG OUT 0</string>
+-           </property>
+-          </item>
+          </widget>
+         </item>
+        </layout>
+@@ -213,11 +208,6 @@
+             <string>FAST OUT 2</string>
+            </property>
+           </item>
+-          <item>
+-           <property name="text">
+-            <string>ANALOG OUT 0</string>
+-           </property>
+-          </item>
+           <item>
+            <property name="text">
+             <string>disabled</string>
+@@ -389,6 +379,9 @@
+               <property name="text">
+                <string>ANALOG OUT 0</string>
+               </property>
++              <property name="visible">
++                <bool>false</bool>
++              </property>
+              </widget>
+             </item>
+             <item>
+@@ -399,6 +392,9 @@
+                 <verstretch>0</verstretch>
+                </sizepolicy>
+               </property>
++              <property name="visible">
++                <bool>false</bool>
++              </property>
+               <item>
+                <property name="text">
+                 <string>positive</string>
+@@ -619,6 +615,9 @@
+      <property name="title">
+       <string>Slow Analog Outputs (0-1.8V)</string>
+      </property>
++     <property name="visible">
++        <bool>false</bool>
++     </property>
+      <layout class="QVBoxLayout" name="verticalLayout_2">
+       <item>
+        <widget class="QLabel" name="label_20">
+diff --git a/linien-gui/linien_gui/ui/main_window.ui b/linien_gui/ui/main_window.ui
+index 3d8b8bf..72f6159 100644
+--- a/linien-gui/linien_gui/ui/main_window.ui
++++ b/linien_gui/ui/main_window.ui
+@@ -145,10 +145,10 @@ p, li { white-space: pre-wrap; }
+                <number>3</number>
+               </property>
+               <property name="minimum">
+-               <double>-1.000000000000000</double>
++               <double>-0.500000000000000</double>
+               </property>
+               <property name="maximum">
+-               <double>1.000000000000000</double>
++               <double>0.500000000000000</double>
+               </property>
+               <property name="singleStep">
+                <double>0.100000000000000</double>
+@@ -199,13 +199,13 @@ p, li { white-space: pre-wrap; }lin
+                <double>0.000000000000000</double>
+               </property>
+               <property name="maximum">
+-               <double>1.000000000000000</double>
++               <double>0.500000000000000</double>
+               </property>
+               <property name="singleStep">
+                <double>0.100000000000000</double>
+               </property>
+               <property name="value">
+-               <double>1.000000000000000</double>
++               <double>0.500000000000000</double>
+               </property>
+              </widget>
+             </item>
+@@ -242,7 +242,6 @@ p, li { white-space: pre-wrap; }
+              <widget class="QLabel" name="label_4">
+               <property name="font">
+                <font>
+-                <weight>75</weight>
+                 <bold>true</bold>
+                </font>
+               </property>
+@@ -278,7 +277,6 @@ p, li { white-space: pre-wrap; }
+              <widget class="QLabel" name="label_5">
+               <property name="font">
+                <font>
+-                <weight>75</weight>
+                 <bold>true</bold>
+                </font>
+               </property>
+@@ -366,7 +364,6 @@ p, li { white-space: pre-wrap; }
+                <widget class="QLabel" name="label">
+                 <property name="font">
+                  <font>
+-                  <weight>75</weight>
+                   <bold>true</bold>
+                  </font>
+                 </property>
+diff --git a/linien-gui/linien_gui/ui/modulation_sweep_panel.ui b/linien_gui/ui/modulation_sweep_panel.ui
+index 6d8af14..29c8a63 100644
+--- a/linien-gui/linien_gui/ui/modulation_sweep_panel.ui
++++ b/linien_gui/ui/modulation_sweep_panel.ui
+@@ -68,7 +68,7 @@
+            <number>3</number>
+           </property>
+           <property name="maximum">
+-           <double>2.000000000000000</double>
++           <double>0.500000000000000</double>
+           </property>
+           <property name="singleStep">
+            <double>0.100000000000000</double>
+@@ -105,82 +105,82 @@
+           </property>
+           <item>
+            <property name="text">
+-            <string>3.8 kHz</string>
++            <string>3.04 kHz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+-            <string>1.9 kHz</string>
++            <string>1.52 kHz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+-            <string>954 Hz</string>
++            <string>763 Hz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+-            <string>477 Hz</string>
++            <string>382 Hz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+-            <string>238 Hz</string>
++            <string>190 Hz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+-            <string>119 Hz</string>
++            <string>95 Hz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+-            <string>59 Hz</string>
++            <string>47 Hz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+-            <string>30 Hz</string>
++            <string>24 Hz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+-            <string>15 Hz</string>
++            <string>12 Hz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+-            <string>7.5 Hz</string>
++            <string>6 Hz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+-            <string>3.7 Hz</string>
++            <string>2.96 Hz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+-            <string>1.9 Hz</string>
++            <string>1.52 Hz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+-            <string>0.93 Hz</string>
++            <string>0.74 Hz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+-            <string>0.47 Hz</string>
++            <string>0.38 Hz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+-            <string>0.23 Hz</string>
++            <string>0.18 Hz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+-            <string>0.12 Hz</string>
++            <string>0.10 Hz</string>
+            </property>
+           </item>
+          </widget>

fast-servo/linien-gui-fast-servo-rm-ota-update.patch

@@ -0,0 +1,43 @@
+diff --git a/linien_gui/ui/device_manager.py b/linien_gui/ui/device_manager.py
+index e584825..16994ad 100644
+--- a/linien_gui/ui/device_manager.py
++++ b/linien_gui/ui/device_manager.py
+@@ -109,19 +109,13 @@ class DeviceManager(QtWidgets.QMainWindow):
+         ) -> None:
+             loading_dialog.hide()
+             if not aborted:
+-                display_question = (
++                # Fast Servo does not support OTA Update
++                display_error = (
+                     f"Server version ({remote_version}) does not match the client "
+-                    f"({client_version}) version. Should the corresponding server "
+-                    f"version be installed?"
++                    f"({client_version}) version."
++                    f"Please install a matching server and client version"
+                 )
+-                if question_dialog(
+-                    self, display_question, "Install corresponding version?"
+-                ):
+-                    show_installation_progress_widget(
+-                        parent=self,
+-                        device=device,
+-                        callback=lambda: self.connect_to_device(device),
+-                    )
++                error_dialog(self, display_error)
+ 
+         def handle_authentication_exception():
+             loading_dialog.hide()
+diff --git a/linien_gui/ui/main_window.py b/linien_gui/ui/main_window.py
+index dad465e..8d6a0b4 100644
+--- a/linien_gui/ui/main_window.py
++++ b/linien_gui/ui/main_window.py
+@@ -202,7 +202,8 @@ class MainWindow(QtWidgets.QMainWindow):
+         super().closeEvent(*args, **kwargs)
+ 
+     def show_new_version_available(self):
+-        self.newVersionAvailableLabel.show()
++        # Fast Servo does not support OTA Update
++        pass
+ 
+     def handle_key_press(self, key):
+         logger.debug(f"key pressed {key}")

fast-servo/linien-pyrp3-monitor.patch

@@ -0,0 +1,95 @@
+# Fix for bus error issues when compiling cpython extensions in pyrp3 v1.2.0+
+# Patch sourced from: https://github.com/linien-org/pyrp3/tree/e6688acf8bd79d2dbe1d192d09c1a1baf1f6c67b (setup.py & monitor/Makefile)
+# Reference: https://github.com/elhep/Fast-Servo-Firmware/blob/master/OS/scripts/linien_install_requirements.sh#L28
+
+diff --git a/monitor/Makefile b/monitor/Makefile
+new file mode 100644
+index 0000000..0c9bb53
+--- /dev/null
++++ b/monitor/Makefile
+@@ -0,0 +1,31 @@
++# Makefile for libmonitor
++
++OBJS = monitor.o
++SRCS = $(subst .o,.c, $(OBJS)))
++OSOBJS = monitor.os
++TARGETLIB=libmonitor.so
++CFLAGS=-g -std=gnu99 -Wall -Werror
++LIBS=-lm -lpthread
++
++# Use CROSS_COMPILE=arm-linux-gnueabi-
++CC=$(CROSS_COMPILE)gcc
++INSTALL_DIR ?= .
++
++
++all: $(TARGETLIB)
++lib: $(TARGETLIB)
++
++%.os: %.c
++	$(CC) -c -fPIC $(CFLAGS) $< -o $@
++
++$(TARGETLIB): $(OSOBJS)
++	$(CC) -o $@ -shared $^ $(CFLAGS) $(LIBS)
++
++clean:
++	rm -f $(TARGETLIB) *.o *.os
++
++# Install target - creates 'lib/' sub-directory in $(INSTALL_DIR) and copies all
++# executables to that location.
++install:
++	mkdir -p $(INSTALL_DIR)/lib
++	cp $(TARGETLIB) $(INSTALL_DIR)/lib
+\ No newline at end of file
+diff --git a/pyrp3/raw_memory.py b/pyrp3/raw_memory.py
+index ce1b28e..233b82a 100644
+--- a/pyrp3/raw_memory.py
++++ b/pyrp3/raw_memory.py
+@@ -1,12 +1,9 @@
+ from ctypes import POINTER, c_uint32, cast, cdll, create_string_buffer, sizeof
+-from importlib.machinery import EXTENSION_SUFFIXES
+ from pathlib import Path
+ 
+ import numpy as np
+ 
+-libmonitor_file = str(
+-    Path(__file__).parent / ".." / "monitor{}".format(EXTENSION_SUFFIXES[0])
+-)
++libmonitor_file = 'libmonitor.so'
+ 
+ libmonitor = cdll.LoadLibrary(libmonitor_file)
+ libmonitor.read_value.restype = c_uint32
+diff --git a/setup.py b/setup.py
+index 9302177..2258ddc 100644
+--- a/setup.py
++++ b/setup.py
+@@ -1,4 +1,28 @@
+-from distutils.core import Extension, setup
++import os
++from distutils.core import setup
++from distutils.command.build import build
++
++
++build_dir = "monitor/"
++
++def compile_libmonitor():
++    cwd = os.getcwd()  # get current directory
++    try:
++        os.chdir(build_dir)
++        os.system("make clean")
++        os.system("make all")
++    finally:
++        os.chdir(cwd)
++
++class lib_build(build):
++    def run(self):
++        compile_libmonitor()
++        build.run(self)
++
++setup_args = dict(
++    cmdclass={
++        "build": lib_build
++    }
++)
+ 
+-setup_args = dict(ext_modules=[Extension("monitor", ["monitor/monitor.c"])])
+ setup(**setup_args)

fast-servo/linien-server-fast-servo-hardware-specific.patch

@@ -0,0 +1,22 @@
+diff --git a/linien-server/linien_server/parameters.py b/linien-server/linien_server/parameters.py
+index 12f16ed..287f304 100644
+--- a/linien-server/linien_server/parameters.py
++++ b/linien-server/linien_server/parameters.py
+@@ -311,7 +311,7 @@ class Parameters:
+         # ------------------- MODULATION PARAMETERS ------------------------------------
+ 
+         self.modulation_amplitude = Parameter(
+-            min_=0, max_=(1 << 14) - 1, start=1 * Vpp, restorable=True, loggable=True
++            min_=0, max_=(1 << 14) - 1, start=0.1 * Vpp, restorable=True, loggable=True
+         )
+         """
+         The amplitude of the modulation in internal units. Use Vpp for conversion to
+@@ -320,7 +320,7 @@ class Parameters:
+         """
+ 
+         self.modulation_frequency = Parameter(
+-            min_=0, max_=0xFFFFFFFF, start=15 * MHz, restorable=True, loggable=True
++            min_=0, max_=0xFFFFFFFF, start=1 * MHz, restorable=True, loggable=True
+         )
+         """
+         Frequency of the modulation in internal units. Use MHz for conversion to

fast-servo/linien-server-fast-servo.patch

@@ -0,0 +1,26 @@
+diff --git a/linien-server/linien_server/cli.py b/linien-server/linien_server/cli.py
+index 98539b2..7781c74 100644
+--- a/linien-server/linien_server/cli.py
++++ b/linien-server/linien_server/cli.py
+@@ -83,18 +83,9 @@ class LinienServerCLI:
+         else:
+             control = RedPitayaControlService(host=host)
+ 
+-        if fake or host:
+-            authenticator = no_authenticator
+-        else:
+-            authenticator = username_and_password_authenticator
+-
+-        try:
+-            if not (fake or host):  # only available on RP
+-                mdio_tool.disable_ethernet_blinking()
+-            run_threaded_server(control, authenticator=authenticator)
+-        finally:
+-            if not (fake or host):  # only available on RP
+-                mdio_tool.enable_ethernet_blinking()
++        authenticator = no_authenticator
++
++        run_threaded_server(control, authenticator=authenticator)
+ 
+     def enable(self) -> None:
+         """Enable the Linien server to start on boot."""

fast-servo/linien_module_pipeline.patch

@@ -0,0 +1,57 @@
+diff --git a/gateware/linien_module.py b/gateware/linien_module.py
+index a958896..a64714c 100644
+--- a/gateware/linien_module.py
++++ b/gateware/linien_module.py
+@@ -233,23 +233,46 @@ class LinienModule(Module, AutoCSR):
+             self.fast_a.adc.eq(soc.analog.adc_a),
+             self.fast_b.adc.eq(soc.analog.adc_b),
+         ]
+-
++        
+         # now, we combine the output of the two paths, with a variable factor each.
+         mixed = Signal(
+             (2 + ((signal_width + 1) + self.logic.chain_a_factor.size), True)
+         )
++
++        chain_a_factor_mult_fast_a_out_i = Signal(
++            (2 + ((signal_width + 1) + self.logic.chain_a_factor.size), True)
++        )
++
++        chain_b_factor_mult_fast_b_out_i = Signal(
++            (2 + ((signal_width + 1) + self.logic.chain_a_factor.size), True)
++        )
++        combined_offset_signed_left_shifted = Signal(
++            (2 + ((signal_width + 1) + self.logic.chain_a_factor.size), True)
++        )
++        fast_a_out_i_left_shifted = Signal(
++            (2 + ((signal_width + 1) + self.logic.chain_a_factor.size), True)
++        )
++
++        self.sync += [
++            chain_a_factor_mult_fast_a_out_i.eq(self.logic.chain_a_factor.storage * self.fast_a.out_i),
++            chain_b_factor_mult_fast_b_out_i.eq(self.logic.chain_b_factor.storage * self.fast_b.out_i),
++            combined_offset_signed_left_shifted.eq(self.logic.combined_offset_signed << (chain_factor_bits + s)),
++            fast_a_out_i_left_shifted.eq(self.fast_a.out_i << chain_factor_bits),
++        ] 
++
++
+         self.comb += [
+             If(
+                 self.logic.dual_channel.storage,
+                 mixed.eq(
+-                    (self.logic.chain_a_factor.storage * self.fast_a.out_i)
+-                    + (self.logic.chain_b_factor.storage * self.fast_b.out_i)
+-                    + (self.logic.combined_offset_signed << (chain_factor_bits + s))
++                    chain_a_factor_mult_fast_a_out_i
++                    + chain_b_factor_mult_fast_b_out_i
++                    + combined_offset_signed_left_shifted
+                 ),
+             ).Else(
+                 mixed.eq(
+-                    (self.fast_a.out_i << chain_factor_bits)
+-                    + (self.logic.combined_offset_signed << (chain_factor_bits + s))
++                    fast_a_out_i_left_shifted
++                    + combined_offset_signed_left_shifted
+                 )
+             )
+         ]

fast-servo/pid_err_sig_pipeline.patch

@@ -0,0 +1,19 @@
+diff --git a/gateware/logic/pid.py b/gateware/logic/pid.py
+index e737577..f1a4096 100644
+--- a/gateware/logic/pid.py
++++ b/gateware/logic/pid.py
+@@ -43,10 +43,12 @@ class PID(Module, AutoCSR):
+         self.comb += [setpoint_signed.eq(self.setpoint.storage)]
+ 
+         self.error = Signal((self.width + 1, True))
++        error_reg = Signal((self.width + 1, True))
++        self.sync += self.error.eq(error_reg)
+ 
+         self.comb += [
+-            If(self.running, self.error.eq(self.input - self.setpoint.storage)).Else(
+-                self.error.eq(0)
++            If(self.running, error_reg.eq(self.input - self.setpoint.storage)).Else(
++                error_reg.eq(0)
+             )
+         ]
+ 

fast-servo/pid_pipeline.patch

@@ -0,0 +1,64 @@
+diff --git a/gateware/logic/pid.py b/gateware/logic/pid.py
+index 4320f94..e737577 100644
+--- a/gateware/logic/pid.py
++++ b/gateware/logic/pid.py
+@@ -56,10 +56,13 @@ class PID(Module, AutoCSR):
+         self.comb += [kp_signed.eq(self.kp.storage)]
+ 
+         kp_mult = Signal((self.width + self.coeff_width, True))
+-        self.comb += [kp_mult.eq(self.error * kp_signed)]
++        kp_mult_reg = Signal((self.width + self.coeff_width, True))
++        self.sync += kp_mult.eq(kp_mult_reg >> (self.coeff_width - 2))
++
++        self.comb += [kp_mult_reg.eq(self.error * kp_signed)]
+ 
+         self.output_p = Signal((self.width, True))
+-        self.comb += [self.output_p.eq(kp_mult >> (self.coeff_width - 2))]
++        self.comb += [self.output_p.eq(kp_mult)]
+ 
+         self.kp_mult = kp_mult
+ 
+@@ -71,8 +74,10 @@ class PID(Module, AutoCSR):
+         self.comb += [ki_signed.eq(self.ki.storage)]
+ 
+         self.ki_mult = Signal((1 + self.width + self.coeff_width, True))
++        self.ki_mult_reg = Signal((1 + self.width + self.coeff_width, True))
++        self.sync += self.ki_mult.eq(self.ki_mult_reg)
++        self.comb += self.ki_mult_reg.eq((self.error * ki_signed) >> 4)
+ 
+-        self.comb += [self.ki_mult.eq((self.error * ki_signed) >> 4)]
+ 
+         int_reg_width = self.width + self.coeff_width + 4
+         extra_width = int_reg_width - self.width
+@@ -110,15 +115,17 @@ class PID(Module, AutoCSR):
+         self.kd = CSRStorage(self.coeff_width)
+         kd_signed = Signal((self.coeff_width, True))
+         kd_mult = Signal((mult_width, True))
++        kd_mult_reg = Signal((mult_width, True))
++        self.sync += kd_mult.eq(kd_mult_reg)
+ 
+-        self.comb += [kd_signed.eq(self.kd.storage), kd_mult.eq(self.error * kd_signed)]
++        self.comb += [kd_signed.eq(self.kd.storage), kd_mult_reg.eq(self.error * kd_signed >> (self.coeff_width - self.d_shift))]
+ 
+         kd_reg = Signal((out_width, True))
+         kd_reg_r = Signal((out_width, True))
+ 
+         self.output_d = Signal((out_width, True))
+         self.sync += [
+-            kd_reg.eq(kd_mult >> (self.coeff_width - self.d_shift)),
++            kd_reg.eq(kd_mult),
+             kd_reg_r.eq(kd_reg),
+             self.output_d.eq(kd_reg - kd_reg_r),
+         ]
+@@ -143,4 +150,10 @@ class PID(Module, AutoCSR):
+ 
+         # sync is required here, otherwise we get artifacts when one of the
+         # signals changes sign
+-        self.sync += [self.pid_sum.eq(self.output_p + self.int_out + self.output_d)]
++        self.sync += [
++            If(
++                self.running,
++                self.pid_sum.eq(self.output_p + self.int_out + self.output_d),
++            )
++            .Else(self.pid_sum.eq(0))
++        ]

fast-servo/pyfastservo/README.md

@@ -0,0 +1,5 @@
+## Source Repository
+Files in this directory were copied from [elhep/Fast-Servo-Firmware](https://github.com/elhep/Fast-Servo-Firmware/tree/master/fast_servo/pythonscripts).
+
+## Commit ID
+The files were copied from commit ID [7fae40c](https://github.com/elhep/Fast-Servo-Firmware/commit/7fae40c0f872a91218be378f8289b98b1e366729).

fast-servo/pyfastservo/adc.py

@@ -0,0 +1,224 @@
+# This file is part of Fast Servo Software Package.
+#
+# Copyright (C) 2023 Jakub Matyas
+# Warsaw University of Technology <jakubk.m@gmail.com>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful, 
+# but WITHOUT ANY WARRANTY; without even the implied warranty of 
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+import time
+import spidev
+from pyfastservo.common import (
+    ADC_AFE_CTRL_ADDR,
+    ADC_BITSLIP_ADDR,
+    ADC_CH0_HIGH_ADDR,
+    ADC_CH0_LOW_ADDR,
+    ADC_CH1_HIGH_ADDR,
+    ADC_CH1_LOW_ADDR,
+    ADC_DELAY_ADDR,
+    ADC_FRAME_ADDR,
+    AUX_ADC_ADDR,
+    MAP_MASK,
+    PAGESIZE,
+    write_to_memory,
+    read_from_memory
+)
+
+# /dev/spidev1.0  <=> spidev<BUS>.<DEVICE>
+MAIN_ADC_BUS = 1
+MAIN_ADC_DEVICE = 1
+
+AUX_ADC_BUS = 1
+AUX_ADC_PORT_A = 2
+AUX_ADC_PORT_B = 3
+
+
+def spi_write(spi, address, value):
+    spi.xfer2([address, value])
+
+def spi_read(spi, address):
+    rx_buffer = spi.xfer2([0x80 | address, 0x00])
+    return rx_buffer[1]
+
+def main_adc_config(spi, test_pattern):
+    high_word = (test_pattern & 0xFF00) >> 8
+    low_word = test_pattern & 0xFF
+
+    spi_write(spi, 0x00, 0x80)              # reset
+    spi_write(spi, 0x01, 0x20)              # REGISTER A1: set to Two's complement Data Format
+    spi_write(spi, 0x02, 0x15)              # REGISTER A2: set to LVDS output, set 4 data lanes and turn on test mode
+    spi_write(spi, 0x03, high_word)         # REGISTER A3: test pattern high word
+    spi_write(spi, 0x04, low_word)          # REGISTER A4: test pattern low word
+
+def main_adc_test_mode(spi, enable):
+    reg_contents = 0x15 if enable else 0x11 # set to LVDS output, set 4 data lanes and turn on or off test mode
+    spi_write(spi, 0x02, reg_contents)
+
+def verify_adc_registers(spi, reg_to_check):
+    for register, expected_value in reg_to_check.items():
+        value = spi_read(spi, register)
+        print(f"Spi readback register 0x{register:02x}: 0x{value:02x}")
+        if value != expected_value:
+            print(f"Different value read than sent in reg 0x{register:02x}")
+
+def read_frame():
+    return read_from_memory(ADC_FRAME_ADDR, 1)[0]
+
+def perform_bitslip():
+    for i in range(4):
+        current_frame = read_frame()
+        if current_frame & 0x0F != 0x0C:
+            print(f"Performing bitslip (iteration: {i}). Current frame: 0x{current_frame:02x}")
+            write_to_memory(ADC_BITSLIP_ADDR, 1)
+        else:
+            print(f"No bitslip required; Current frame: 0x{current_frame:02x}")
+            return
+
+def mmcm_rst():
+    curr_cfg = read_from_memory(ADC_AFE_CTRL_ADDR, 1)[0] & 0x0F
+    write_to_memory(ADC_AFE_CTRL_ADDR, 0x10 | curr_cfg) # Reset MMCM
+    write_to_memory(ADC_AFE_CTRL_ADDR, 0x00 | curr_cfg) # Release MMCM Reset
+    while not(read_frame() & 0x10):
+        print(f"Waiting for MMCM to lock")
+        time.sleep(0.001)
+
+def inc_ddr_clk_phase():
+    curr_cfg = read_from_memory(ADC_AFE_CTRL_ADDR, 1)[0] & 0x1F
+    write_to_memory(ADC_AFE_CTRL_ADDR, 0x40 | curr_cfg) # Set MMCM Phase Shift to be INC
+    write_to_memory(ADC_AFE_CTRL_ADDR, 0x60 | curr_cfg) # Assert MMCM Phase Shift EN High
+    write_to_memory(ADC_AFE_CTRL_ADDR, curr_cfg)        # Deassert MMCM Phase Shift EN High
+
+def dec_ddr_clk_phase():
+    curr_cfg = read_from_memory(ADC_AFE_CTRL_ADDR, 1)[0] & 0x1F
+    write_to_memory(ADC_AFE_CTRL_ADDR, 0x00 | curr_cfg) # Set MMCM Phase Shift to be DEC
+    write_to_memory(ADC_AFE_CTRL_ADDR, 0x20 | curr_cfg) # Assert MMCM Phase Shift EN High
+    write_to_memory(ADC_AFE_CTRL_ADDR, curr_cfg)        # Deassert MMCM Phase Shift EN High
+
+def find_edge():
+    prev_frame = read_frame()
+    for tap_delay in range(32):
+        write_to_memory(ADC_DELAY_ADDR, tap_delay)
+        current_frame = read_frame()
+
+        print(f"Tap delay: {tap_delay}, Current frame: 0x{current_frame:02x}")
+        print(f"prev_frame: 0x{prev_frame:02x}")
+
+        if current_frame != prev_frame:
+            final_delay = ((tap_delay+1) // 2) + 2
+            print(f"Edge detected; setting iDelay to: {final_delay}")
+            write_to_memory(ADC_DELAY_ADDR, final_delay)
+            return
+
+        prev_frame = current_frame
+
+    # If no edge detected
+    final_delay = 11
+    print(f"No edge detected; setting iDelay to: {final_delay}")
+    write_to_memory(ADC_DELAY_ADDR, final_delay)
+
+def read_adc_channel(high_addr, low_addr):
+    return (read_from_memory(high_addr, 1)[0] << 8) | read_from_memory(low_addr, 1)[0]
+
+def print_adc_channels():
+    adc_ch0 = read_adc_channel(ADC_CH0_HIGH_ADDR, ADC_CH0_LOW_ADDR)
+    adc_ch1 = read_adc_channel(ADC_CH1_HIGH_ADDR, ADC_CH1_LOW_ADDR)
+    print(f"Final ADC_CH0: 0x{adc_ch0:04x}")
+    print(f"Final ADC_CH1: 0x{adc_ch1:04x}")
+
+def enable_adc_afe(ch1_x10=False, ch2_x10=False):
+    ctrl_value = (ch2_x10 << 1) | ch1_x10
+    write_to_memory(ADC_AFE_CTRL_ADDR, ctrl_value)
+    afe_ctrl = read_from_memory(ADC_AFE_CTRL_ADDR, 1)[0]
+    print(f"ADC_AFE_CTRL: 0x{afe_ctrl:02X}")
+    return afe_ctrl
+
+def search_edge():
+    for tap_delay in range(32):
+        print(f"iDelay to: {tap_delay}")
+        write_to_memory(ADC_DELAY_ADDR, tap_delay)
+        time.sleep(1)
+        current_frame = read_frame()
+        print(f"Tap delay: {tap_delay}, Current frame: 0x{current_frame:02x}")
+        print_adc_channels()
+
+def print_adc_channel(ch):
+    if ch == 0:
+        adc_ch0 = read_adc_channel(ADC_CH0_HIGH_ADDR, ADC_CH0_LOW_ADDR)
+        print(f"Final ADC_CH0: 0x{adc_ch0:04x}")
+    if ch == 1:
+        adc_ch1 = read_adc_channel(ADC_CH1_HIGH_ADDR, ADC_CH1_LOW_ADDR)
+        print(f"Final ADC_CH1: 0x{adc_ch1:04x}")
+
+def find_min_max_ch(ch):
+    test = []
+    for i in range(100):
+        if ch == 0:
+            test.append(read_adc_channel(ADC_CH0_HIGH_ADDR, ADC_CH0_LOW_ADDR))
+        else:
+            test.append(read_adc_channel(ADC_CH1_HIGH_ADDR, ADC_CH1_LOW_ADDR)) 
+        print("ch", ch, hex(test[-1]))
+    print("Min:", hex(min(test)))
+    print("Max:", hex(max(test)))
+    print("Diff:", hex(max(test)-min(test)))
+
+
+def configure_ltc2195():
+    spi = spidev.SpiDev()
+    try:
+        spi.open(MAIN_ADC_BUS, MAIN_ADC_DEVICE)
+        spi.max_speed_hz = 50000
+        spi.mode = 0b00  # CPOL = 0 CPHA = 0
+        spi.cshigh = False
+
+        test_pattern = 0x811F
+        main_adc_config(spi, test_pattern)
+
+        verify_adc_registers(spi, {
+            0x01: 0x20,
+            0x02: 0x15,
+            0x03: (test_pattern & 0xFF00) >> 8,
+            0x04: test_pattern & 0xFF
+        })
+
+        # ADC software reset put its PLL to sleep momentarily. Thus, MMCM needs to be reset as well.
+        mmcm_rst()
+        
+        # Performing Word Align
+        perform_bitslip()
+        find_edge()
+        
+        # Printing it once is not enough to check whether the alignment is correct.
+        for i in range(100):
+            print_adc_channels()
+
+        main_adc_test_mode(spi, False)
+        verify_adc_registers(spi, {0x02: 0x11})  # Verify test mode is off
+      
+        # FIXME: AFE Gain 1x is not functional on that batch of fast servo under development
+        enable_adc_afe(ch1_x10=1, ch2_x10=1)
+
+        #find_min_max_ch(0)
+        #find_min_max_ch(1)
+
+        #for i in range(10):
+        #    print_adc_channel(0)
+
+        #for i in range(10):
+        #    print_adc_channel(1)
+
+    finally:
+        spi.close()
+
+if __name__ == "__main__":
+    configure_ltc2195()

fast-servo/pyfastservo/common.py

@@ -0,0 +1,120 @@
+# This file is part of Fast Servo Software Package.
+#
+# Copyright (C) 2023 Jakub Matyas
+# Warsaw University of Technology <jakubk.m@gmail.com>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful, 
+# but WITHOUT ANY WARRANTY; without even the implied warranty of 
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+import os
+import mmap
+
+CSR_SIZE = 0x800
+MAP_SIZE = 0x1000
+MAP_MASK = 0xFFF
+PAGESIZE = 0x1000
+
+# LINIEN_OFFSET = 0x0
+LINIEN_OFFSET = 0x300000
+
+# ----------------------------------------------------------------
+# FRONT PANEL LEDS REGISTER ADDRESSES
+LED0_BASE_ADDR = 0x40005000 + LINIEN_OFFSET
+LED1_BASE_ADDR = 0x40005800 + LINIEN_OFFSET
+LED2_BASE_ADDR = 0x40006000 + LINIEN_OFFSET
+LED3_BASE_ADDR = 0x40006800 + LINIEN_OFFSET
+
+
+# ----------------------------------------------------------------
+# DAC REGISTER ADDRESSES
+ADC_BASE_ADDR            =      0x40004800 + LINIEN_OFFSET
+ADC_FRAME_OFFSET         =      0x0
+ADC_CH0_HIGH_OFFSET      =      0x4
+ADC_CH0_LOW_OFFSET       =      0x8
+ADC_CH1_HIGH_OFFSET      =      0xC
+ADC_CH1_LOW_OFFSET       =      0x10
+ADC_TAP_DELAY_OFFSET     =      0x14
+ADC_BITSLIP_OFFSET       =      0x18
+ADC_AFE_CTRL_OFFSET     =       0x1C
+
+
+ADC_FRAME_ADDR      =   ADC_BASE_ADDR + ADC_FRAME_OFFSET
+ADC_CH0_HIGH_ADDR   =   ADC_BASE_ADDR + ADC_CH0_HIGH_OFFSET
+ADC_CH0_LOW_ADDR    =   ADC_BASE_ADDR + ADC_CH0_LOW_OFFSET
+ADC_CH1_HIGH_ADDR   =   ADC_BASE_ADDR + ADC_CH1_HIGH_OFFSET
+ADC_CH1_LOW_ADDR    =   ADC_BASE_ADDR + ADC_CH1_LOW_OFFSET
+ADC_DELAY_ADDR      =   ADC_BASE_ADDR + ADC_TAP_DELAY_OFFSET
+ADC_BITSLIP_ADDR    =   ADC_BASE_ADDR + ADC_BITSLIP_OFFSET
+ADC_AFE_CTRL_ADDR   =   ADC_BASE_ADDR + ADC_AFE_CTRL_OFFSET
+
+AUX_ADC_ADDR        =   0x40007800 + LINIEN_OFFSET
+
+
+# ----------------------------------------------------------------
+# DAC REGISTER ADDRESSES
+DAC_BASE_ADDR           =   0x40007000 + LINIEN_OFFSET
+CTRL_OFFSET             =   0x0
+CH0_HIGH_WORD_OFFSET    =   0x4
+CH0_LOW_WORD_OFFSET     =   0x8
+CH1_HIGH_WORD_OFFSET    =   0xC
+CH1_LOW_WORD_OFFSET     =   0x10
+
+CTRL_ADDR               =   DAC_BASE_ADDR + CTRL_OFFSET
+CH0_HIGH_WORD_ADDR      =   DAC_BASE_ADDR + CH0_HIGH_WORD_OFFSET
+CH0_LOW_WORD_ADDR       =   DAC_BASE_ADDR + CH0_LOW_WORD_OFFSET
+CH1_HIGH_WORD_ADDR      =   DAC_BASE_ADDR + CH1_HIGH_WORD_OFFSET
+CH1_LOW_WORD_ADDR       =   DAC_BASE_ADDR + CH1_LOW_WORD_OFFSET
+
+
+def read_from_memory(address, n_bytes):
+    assert n_bytes <= 4
+    addr = address
+
+    try:
+        f = os.open("/dev/mem", os.O_SYNC | os.O_RDWR)
+        with mmap.mmap(
+            f,
+            PAGESIZE,
+            mmap.MAP_SHARED,
+            mmap.PROT_READ | mmap.PROT_WRITE,
+            offset=addr & ~MAP_MASK,
+        ) as mem:
+            start_addr = addr & MAP_MASK
+            stop_addr = start_addr + 4
+            contents = mem[start_addr:stop_addr]
+            read_value = list(contents)[:n_bytes]
+    finally:
+        os.close(f)
+
+    return read_value
+
+def write_to_memory(address, value):
+    value_bytes = value.to_bytes(4, "little")
+    addr = address
+
+    try:
+        f = os.open("/dev/mem", os.O_SYNC | os.O_RDWR)
+        with mmap.mmap(
+            f,
+            PAGESIZE,
+            mmap.MAP_SHARED,
+            mmap.PROT_READ | mmap.PROT_WRITE,
+            offset=addr & ~MAP_MASK,
+        ) as mem:
+            start_addr = addr & MAP_MASK
+            stop_addr = start_addr + 4
+            mem[start_addr:stop_addr] = value_bytes
+            contents = mem[start_addr:stop_addr]
+    finally:
+        os.close(f)

fast-servo/pyfastservo/dac.py

@@ -0,0 +1,168 @@
+# This file is part of Fast Servo Software Package.
+#
+# Copyright (C) 2023 Jakub Matyas
+# Warsaw University of Technology <jakubk.m@gmail.com>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful, 
+# but WITHOUT ANY WARRANTY; without even the implied warranty of 
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+import time
+
+import spidev
+from pyfastservo.common import (
+    CH0_HIGH_WORD_ADDR,
+    CH0_LOW_WORD_ADDR,
+    CH1_HIGH_WORD_ADDR,
+    CH1_LOW_WORD_ADDR,
+    CTRL_ADDR,
+    MAP_MASK,
+    PAGESIZE,
+    write_to_memory,
+    read_from_memory
+)
+
+# /dev/spidev2.0  <=> spidev<BUS>.<DEVICE>
+MAIN_DAC_BUS = 2
+MAIN_DAC_DEVICE = 0
+DAC_VERSION = 0x0A
+
+
+def spi_write(spi, address, value):
+    spi.xfer2([address, value])
+
+def spi_read(spi, address):
+    rx_buffer = spi.xfer2([0x80 | address, 0x00])
+    return rx_buffer[1]
+
+def soft_reset(spi):
+    spi_write(spi, 0x00, 0x10)  # Software reset
+    spi_write(spi, 0x00, 0x00)  # Release software reset
+    spi_read(spi, 0x00)         # Read reset address (necessary for reset to take effect)
+
+def check_version(spi):
+    version = spi_read(spi, 0x1F)
+    print(f"DAC version: 0x{version:02X}")
+    return version == DAC_VERSION
+
+def configure_dac(spi):
+    power_down_reg = spi_read(spi, 0x01)
+    spi_write(spi, 0x01, power_down_reg & ~(1 << 0))  # Clear EXTREF bit for internal reference
+    spi_write(spi, 0x0D, 0x00)      # Set RREF to 10 kΩ for 1.0V reference
+    spi_write(spi, 0x04, 0xA0)      # Enable on-chip IRSET (1.6 kΩ for 20mA output)
+    spi_write(spi, 0x07, 0xA0)      # Enable on-chip QRSET (1.6 kΩ for 20mA output)
+    spi_write(spi, 0x05, 0x00)      # Disable internal IRCML
+    spi_write(spi, 0x08, 0x00)      # Disable internal QRCML
+    spi_write(spi, 0x02, 0xB4)      # Enable 2's complement, IFirst: True, IRising: True, DCI_EN: Enabled
+    spi_write(spi, 0x14, 0x00)      
+    spi_write(spi, 0x14, 0x08)      # Trigger the retimer to reacquire the clock relationship
+    spi_write(spi, 0x14, 0x00)
+
+def dac_self_calibration(spi):
+    spi_write(spi, 0x12, 0x00)      # Reset calibration status
+    spi_write(spi, 0x0E, 0x08)      # Enable calibration clock, default divide ratio
+    spi_write(spi, 0x0E, 0x38)      # CALSELI = 1, CALSELQ = 1, CALCLK = 1
+    spi_write(spi, 0x12, 0x10)      # Set CALEN bit
+
+    while True:
+        status = spi_read(spi, 0x0F)
+        if status & 0xC0 == 0xC0:   # Both CALSTATI and CALSTATQ are 1
+            break
+        time.sleep(0.01)
+
+    spi_write(spi, 0x12, 0x00)      # Clear calibration bits
+    spi_write(spi, 0x0E, 0x30)      # Keep CALSELI and CALSELQ set, clear CALCLK
+    print("DAC self-calibration completed")
+
+def manual_override(enable=True):
+    reg_contents = read_from_memory(CTRL_ADDR, 1)[0]
+    to_write = reg_contents | 0b1 if enable else reg_contents & 0b110
+    write_to_memory(CTRL_ADDR, to_write)
+    print(f"Set DAC Output Manual Override: {enable}")
+
+def power_down_afe(channel, power_down=True):
+    assert channel in (0, 1)
+
+    bitmask = 1 << (channel + 1) & 0b111
+    reg_contents = read_from_memory(CTRL_ADDR, 1)[0]
+    value = (1 if power_down else 0) << (channel + 1)
+    reg_contents &= ~bitmask
+
+    to_write = reg_contents | value
+    write_to_memory(CTRL_ADDR, to_write)
+    reg_contents = read_from_memory(CTRL_ADDR, 1)[0]
+    print(f"Power Down DAC AFE Ch{channel}: {power_down}")
+
+def set_dac_output(value):
+    value = min(value, 0x3FFF)
+    low_word = value & 0xFF
+    high_word = (value >> 8) & 0x3F
+
+    # Note: DAC HIGH word and LOW word output are not updated 
+    #   at the same time. On scope, you will see more than one step
+    #   of value changed.
+    write_to_memory(CH0_HIGH_WORD_ADDR, high_word)
+    write_to_memory(CH0_LOW_WORD_ADDR, low_word)
+    write_to_memory(CH1_HIGH_WORD_ADDR, high_word)
+    write_to_memory(CH1_LOW_WORD_ADDR, low_word)
+    print(f"DAC output set to: 0x{value:04X}")
+
+def check_clk_relationship(spi):
+    clkmode_reg = spi_read(spi, 0x14)
+    print(f"CLKMODE reg: 0x{clkmode_reg:02X}")
+    if clkmode_reg & 0b00010000:
+        print("Clock relationship is not found")
+        return False
+    else:
+        print("Clock relationship is found")
+        return True
+
+def configure_ad9117():
+    spi = spidev.SpiDev()
+    spi.open(MAIN_DAC_BUS, MAIN_DAC_DEVICE)
+    spi.max_speed_hz = 5000
+    spi.mode = 0b00  # CPOL = 0 CPHA = 0
+    spi.cshigh = False
+
+    try:
+        soft_reset(spi)
+        if not check_version(spi):
+            print("Unrecognized DAC version")
+            return False
+
+        power_down_afe(0, True)
+        power_down_afe(1, True)
+
+        configure_dac(spi)
+        check_clk_relationship(spi)
+        dac_self_calibration(spi)
+
+        # Enable DAC outputs
+        spi_write(spi, 0x01, spi_read(spi, 0x01) & ~((1 << 4) | (1 << 3)))
+
+        power_down_afe(0, False)
+        power_down_afe(1, False)
+        manual_override(False)
+
+        print("AD9117 configuration completed successfully")
+        return True
+
+    except Exception as e:
+        print(f"Error configuring AD9117: {e}")
+        return False
+
+    finally:
+        spi.close()
+
+if __name__ == "__main__":
+    configure_ad9117()

fast-servo/pyfastservo/fp_leds.py

@@ -0,0 +1,66 @@
+# This file is part of Fast Servo Software Package.
+#
+# Copyright (C) 2023 Jakub Matyas
+# Warsaw University of Technology <jakubk.m@gmail.com>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful, 
+# but WITHOUT ANY WARRANTY; without even the implied warranty of 
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+import mmap
+import os
+import time
+
+from pyfastservo.common import (
+    LED0_BASE_ADDR,
+    LED1_BASE_ADDR,
+    LED2_BASE_ADDR,
+    LED3_BASE_ADDR,
+    MAP_MASK,
+    PAGESIZE,
+)
+
+ON = 1
+OFF = 0
+
+
+def main():
+    addrs = [LED0_BASE_ADDR, LED1_BASE_ADDR, LED2_BASE_ADDR, LED3_BASE_ADDR]
+
+    f = os.open("/dev/mem", os.O_SYNC | os.O_RDWR)
+    for addr in addrs:
+        with mmap.mmap(
+            f,
+            PAGESIZE,
+            mmap.MAP_SHARED,
+            mmap.PROT_READ | mmap.PROT_WRITE,
+            offset=addr & ~MAP_MASK,
+        ) as mem:
+            for i in range(6):
+                start_addr = addr & MAP_MASK
+                stop_addr = start_addr + 4
+                print(
+                    f"addr: 0x{addr:x}\tstart_addr: 0x{start_addr}\tstop_addr: 0x{stop_addr}"
+                )
+                mem[start_addr:stop_addr] = ON.to_bytes(4, "little")
+                contents = mem[start_addr:stop_addr]
+                time.sleep(0.5)
+                mem[start_addr:stop_addr] = OFF.to_bytes(4, "little")
+                contents = mem[start_addr:stop_addr]
+                time.sleep(0.5)
+
+    os.close(f)
+
+
+if __name__ == "__main__":
+    main()

fast-servo/pyfastservo/initialize.py

@@ -0,0 +1,28 @@
+# This file is part of Fast Servo Software Package.
+#
+# Copyright (C) 2023 Jakub Matyas
+# Warsaw University of Technology <jakubk.m@gmail.com>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful, 
+# but WITHOUT ANY WARRANTY; without even the implied warranty of 
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+from pyfastservo import adc, si5340, dac
+
+def main():
+    si5340.configure_si5340()
+    adc.configure_ltc2195()
+    dac.configure_ad9117()
+
+if __name__ == "__main__":
+    main()

fast-servo/pyfastservo/si5340.py

@@ -0,0 +1,280 @@
+# This file is part of Fast Servo Software Package.
+#
+# Copyright (C) 2023 Jakub Matyas
+# Warsaw University of Technology <jakubk.m@gmail.com>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful, 
+# but WITHOUT ANY WARRANTY; without even the implied warranty of 
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+# Additional Reference:
+# https://github.com/torvalds/linux/blob/master/drivers/clk/clk-si5341.c
+
+import time
+from smbus2 import SMBus
+
+BUS_NO = 0
+IC_ADDR = 0x74
+
+DEVICE_READY = 0x00FE
+PLL_M_DEN = 0x023B
+STATUS = 0x000C
+STATUS_STICKY = 0x0011
+
+STATUS_LOSREF = 0x04
+STATUS_LOL = 0x08
+
+
+def write_register(bus, address, value):
+    page = address >> 8
+    register = address & 0xFF
+    bus.write_byte_data(IC_ADDR, 0x01, page)
+    try:
+        bus.write_byte_data(IC_ADDR, register, value)
+    except Exception as e:
+        raise Exception(f"Write failed 0x{value:02X} at 0x{address:04X}: {e}")
+
+def write_preamble(bus):
+    preamble = [
+        (0x0B24, 0xC0),
+        (0x0B25, 0x00),
+        (0x0502, 0x01),
+        (0x0505, 0x03),
+        (0x0957, 0x17),
+        (0x0B4E, 0x1A),
+    ]
+    for address, value in preamble:
+        write_register(bus, address, value)
+
+def write_postamble(bus):
+    postamble = [
+        (0x001C, 0x01),  # Soft reset
+        (0x0B24, 0xC3),
+        (0x0B25, 0x02),
+    ]
+    for address, value in postamble:
+        write_register(bus, address, value)
+
+def wait_device_ready(bus):
+    for _ in range(15):
+        if bus.read_byte_data(IC_ADDR, DEVICE_READY) == 0x0F:
+            return True
+        time.sleep(0.02)
+    return False
+
+def wait_for_lock(bus):
+    for _ in range(10):
+        status = bus.read_byte_data(IC_ADDR, STATUS)
+        if not (status & (STATUS_LOSREF | STATUS_LOL)):
+            return True
+        time.sleep(0.01)
+    return False
+
+def check_pll_status(bus):
+    pll_status = bus.read_byte_data(IC_ADDR, 0x0C)
+    pll_locked = not (pll_status & STATUS_LOL)
+    print(f"PLL {'locked' if pll_locked else 'unlocked'}")
+    return pll_locked
+
+def check_los_status(bus):
+    los_status = bus.read_byte_data(IC_ADDR, 0x0D)
+    xaxb_los = (los_status & 0x10) != 0
+    print(f"XA/XB LOS {'asserted' if xaxb_los else 'deasserted'}")
+    return not xaxb_los
+
+def configure_si5340():
+    with SMBus(BUS_NO) as bus:
+        if not wait_device_ready(bus):
+            print("Device not ready. Aborting.")
+            return
+
+        # Programming sequence from ClockBuilder Pro, default settings
+        # to initialize system using XTAL input
+        main_config = [
+            (0x0006, 0x00),  # TOOL_VERSION
+            (0x0007, 0x00),  # Not in datasheet
+            (0x0008, 0x00),  # Not in datasheet
+            (0x000B, 0x74),  # I2C_ADDR
+            (0x0017, 0xD0),  # INT mask (disable interrupts)
+            (0x0018, 0xFF),  # INT mask
+            (0x0021, 0x0F),  # Select XTAL as input
+            (0x0022, 0x00),  # Not in datasheet
+            (0x002B, 0x02),  # SPI config
+            (0x002C, 0x20),  # LOS enable for XTAL
+            (0x002D, 0x00),  # LOS timing
+            (0x002E, 0x00),  # LOS trigger (thresholds)
+            (0x002F, 0x00),
+            (0x0030, 0x00),
+            (0x0031, 0x00),
+            (0x0032, 0x00),
+            (0x0033, 0x00),
+            (0x0034, 0x00),
+            (0x0035, 0x00),  # LOS trigger (thresholds) end
+            (0x0036, 0x00),  # LOS clear (thresholds)
+            (0x0037, 0x00),
+            (0x0038, 0x00),
+            (0x0039, 0x00),
+            (0x003A, 0x00),
+            (0x003B, 0x00),
+            (0x003C, 0x00),
+            (0x003D, 0x00),  # LOS clear (thresholds) end
+            (0x0041, 0x00),  # LOS0_DIV_SEL
+            (0x0042, 0x00),  # LOS1_DIV_SEL
+            (0x0043, 0x00),  # LOS2_DIV_SEL
+            (0x0044, 0x00),  # LOS3_DIV_SEL
+            (0x009E, 0x00),  # LOL_SET_THR
+            (0x0102, 0x01),  # Enable outputs
+            (0x013F, 0x00),  # OUTX_ALWAYS_ON
+            (0x0140, 0x00),  # OUTX_ALWAYS_ON
+            (0x0141, 0x40),  # OUT_DIS_LOL_MSK, OUT_DIS_MSK_LOS_PFD
+            (0x0202, 0x00),  # XAXB_FREQ_OFFSET (=0)
+
+            # PLL Configuration
+            (0x0235, 0x00),  # M_NUM
+            (0x0236, 0x00),
+            (0x0237, 0x00),
+            (0x0238, 0x80),
+            (0x0239, 0x89),
+            (0x023A, 0x00),
+            (0x023B, 0x00),  # M_DEN
+            (0x023C, 0x00),
+            (0x023D, 0x00),
+            (0x023E, 0x80),
+
+            # Synthesizer configuration
+            (0x0302, 0x00),  # N0_NUM
+            (0x0303, 0x00),
+            (0x0304, 0x00),
+            (0x0305, 0x00),
+            (0x0306, 0x21),
+            (0x0307, 0x00),
+            (0x0308, 0x00),  # N0_DEN
+            (0x0309, 0x00),
+            (0x030A, 0x00),
+            (0x030B, 0x80),
+            (0x030C, 0x01), # N0_UPDATE
+
+            # N1 Configuration (1:1 ratio)
+            (0x030D, 0x00),  # N1_NUM
+            (0x030E, 0x00),
+            (0x030F, 0x00),
+            (0x0310, 0x00),
+            (0x0311, 0x00),
+            (0x0312, 0x01),
+            (0x0313, 0x00),  # N1_DEN
+            (0x0314, 0x00),
+            (0x0315, 0x00),
+            (0x0316, 0x01),
+            (0x0317, 0x01),  # N1_UPDATE
+
+            # N2 Configuration (1:1 ratio)
+            (0x0318, 0x00),  # N2_NUM
+            (0x0319, 0x00),
+            (0x031A, 0x00),
+            (0x031B, 0x00),
+            (0x031C, 0x00),
+            (0x031D, 0x01),
+            (0x031E, 0x00),  # N2_DEN
+            (0x031F, 0x00),
+            (0x0320, 0x00),
+            (0x0321, 0x01),
+            (0x0322, 0x01),  # N2_UPDATE
+
+            # N3 Configuration (1:1 ratio)
+            (0x0323, 0x00),  # N3_NUM
+            (0x0324, 0x00),
+            (0x0325, 0x00),
+            (0x0326, 0x00),
+            (0x0327, 0x00),
+            (0x0328, 0x01),
+            (0x0329, 0x00),  # N3_DEN
+            (0x032A, 0x00),
+            (0x032B, 0x00),
+            (0x032C, 0x01),
+            (0x032D, 0x01),  # N3_UPDATE
+
+            # Output configuration
+            (0x0112, 0x06),  # OUT0 config
+            (0x0113, 0x09),  # OUT0 format
+            (0x0114, 0x3B),  # OUT0 CM/AMPL
+            (0x0115, 0x28),  # OUT0 MUX_SEL
+
+            (0x0117, 0x06),  # OUT1 config
+            (0x0118, 0x09),  # OUT1 format
+            (0x0119, 0x3B),  # OUT1 CM/AMPL
+            (0x011A, 0x28),  # OUT1 MUX_SEL
+
+            (0x0126, 0x06),  # OUT2 config
+            (0x0127, 0x09),  # OUT2 format
+            (0x0128, 0x3B),  # OUT2 CM/AMPL
+            (0x0129, 0x28),  # OUT2 MUX_SEL
+
+            (0x012B, 0x06),  # OUT3 config
+            (0x012C, 0xCC),  # OUT3 format
+            (0x012D, 0x00),  # OUT3 CM/AMPL
+            (0x012E, 0x58),  # OUT3 MUX_SEL
+
+            # Miscellaneous configuration
+            (0x090E, 0x02),  # XAXB_EXTCLK_EN=0 XAXB_PDNB=1 (use XTAL)
+            (0x091C, 0x04),  # ZDM_EN=4 (Normal mode)
+            (0x0943, 0x00),  # IO_VDD_SEL
+            (0x0949, 0x00),  # IN_EN (disable input clocks)
+            (0x094A, 0x00),  # INx_TO_PFD_EN (disabled)
+            (0x094E, 0x49),  # REFCLK_HYS_SEL (set by CBPro)
+            (0x094F, 0x02),  # Not in datasheet
+            (0x095E, 0x00),  # M_INTEGER (set by CBPro)
+            (0x0A02, 0x00),  # N_ADD_0P5 (set by CBPro)
+            (0x0A03, 0x01),  # N_CLK_TO_OUTX_EN
+            (0x0A04, 0x01),  # N_PIBYP
+            (0x0A05, 0x01),  # N_PDNB
+            (0x0A14, 0x00),  # N0_HIGH_FREQ (set by CBPro)
+            (0x0A1A, 0x00),  # N1_HIGH_FREQ (set by CBPro)
+            (0x0A20, 0x00),  # N2_HIGH_FREQ (set by CBPro)
+            (0x0A26, 0x00),  # N3_HIGH_FREQ (set by CBPro)
+            (0x0B44, 0x0F),  # PDIV_ENB (set by CBPro)
+            (0x0B4A, 0x0E),  # N_CLK_DIS
+            (0x0B57, 0x0E),  # VCO_RESET_CALCODE (set by CBPro)
+            (0x0B58, 0x01),  # VCO_RESET_CALCODE (set by CBPro)
+        ]
+
+        write_preamble(bus)
+
+        time.sleep(0.3)
+
+        print("Writing main configuration...")
+        for address, value in main_config:
+            write_register(bus, address, value)
+        print("Main configuration written")
+
+        write_postamble(bus)
+
+        if not wait_for_lock(bus):
+            print("Error waiting for input clock or PLL lock")
+        else:
+            print("Input clock present and PLL locked")
+
+        bus.write_byte_data(IC_ADDR, STATUS_STICKY, 0)
+
+        # Final status check
+        pll_locked = check_pll_status(bus)
+        xaxb_signal_present = check_los_status(bus)
+
+        if not pll_locked:
+            print("Error: PLL is not locked")
+        elif not xaxb_signal_present:
+            print("Error: XA/XB signal is lost")
+        else:
+            print("Si5340 configuration completed successfully")
+
+if __name__ == "__main__":
+    configure_si5340()

flake.lock

@@ -18,16 +18,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1709237383,
-        "narHash": "sha256-cy6ArO4k5qTx+l5o+0mL9f5fa86tYUX3ozE1S+Txlds=",
+        "lastModified": 1734323986,
+        "narHash": "sha256-m/lh6hYMIWDYHCAsn81CDAiXoT3gmxXI9J987W5tZrE=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "1536926ef5621b09bba54035ae2bb6d806d72ac8",
+        "rev": "394571358ce82dff7411395829aa6a3aad45b907",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-unstable",
+        "ref": "nixos-24.11",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -64,11 +64,11 @@
     "src-migen": {
       "flake": false,
       "locked": {
-        "lastModified": 1702942348,
-        "narHash": "sha256-gKIfHZxsv+jcgDFRW9mPqmwqbZXuRvXefkZcSFjOGHw=",
+        "lastModified": 1727677091,
+        "narHash": "sha256-Zg3SQnTwMM/VkOGKogbPyuCC2NhLy8HB2SPEUWWNgCU=",
         "owner": "m-labs",
         "repo": "migen",
-        "rev": "50934ad10a87ade47219b796535978b9bdf24023",
+        "rev": "c19ae9f8ae162ffe2d310a92bfce53ac2a821bc8",
         "type": "github"
       },
       "original": {
@@ -80,11 +80,11 @@
     "src-misoc": {
       "flake": false,
       "locked": {
-        "lastModified": 1699352904,
-        "narHash": "sha256-SglyTmXOPv8jJOjwAjJrj/WhAkItQfUbvKfUqrynwRg=",
+        "lastModified": 1729234629,
+        "narHash": "sha256-TLsTCXV5AC2xh+bS7EhBVBKqdqIU3eKrnlWcFF9LtAM=",
         "ref": "refs/heads/master",
-        "rev": "a53859f2167c31ab5225b6c09f30cf05527b94f4",
-        "revCount": 2452,
+        "rev": "6085a312bca26adeca6584e37d08c8ba2e1d6e38",
+        "revCount": 2460,
         "submodules": true,
         "type": "git",
         "url": "https://github.com/m-labs/misoc.git"

flake.nix

@@ -1,7 +1,7 @@
 {
   description = "Firmware for Sinara Fast-Servo based on Not-OS and Linien";
   
-  inputs.nixpkgs.url = github:NixOS/nixpkgs/nixos-unstable;
+  inputs.nixpkgs.url = github:NixOS/nixpkgs/nixos-24.11;
   inputs.not-os.url = github:cleverca22/not-os;
   inputs.not-os.inputs.nixpkgs.follows = "nixpkgs";
 
@@ -10,10 +10,38 @@
 
   outputs = { self, nixpkgs, not-os, src-migen, src-misoc }:
     let
-      pkgs = import nixpkgs { system = "x86_64-linux"; };
-      not-os-cfg = not-os-configured.config.system;
+      pkgs = import nixpkgs { system = "x86_64-linux"; overlays = [ crosspkgs-overlay ]; };
+      pkgs-armv7l = pkgs.pkgsCross.zynq-armv7l-linux;
       fsbl-support = ./fast-servo/fsbl-support;
 
+      version = "2.1.0";
+      linien-src = pkgs.applyPatches {
+          name = "linien-src";
+          src = pkgs.fetchFromGitHub {
+            owner = "linien-org";
+            repo = "linien";
+            rev = "v" + version;
+            sha256 = "sha256-j6oiP/usLfV5HZtKLcXQ5pHhhxRG05kP2FMwingiWm0=";
+          };
+          prePatch = ''
+            mkdir -p fast_servo/gateware
+            cp -r ${./fast-servo/linien-gateware}/. fast_servo/gateware
+          '';
+          patches = [
+            ./fast-servo/linien-common-fast-servo-hardware-specific.patch
+            ./fast-servo/linien-server-fast-servo-hardware-specific.patch
+            ./fast-servo/linien-gui-fast-servo-hardware-specific.patch
+            ./fast-servo/linien-client-ssh-port-change.patch
+            ./fast-servo/linien-server-fast-servo.patch
+            ./fast-servo/linien-gateware-fast-servo.patch 
+            ./fast-servo/autolock_pipeline.patch
+            ./fast-servo/iir_pipeline.patch
+            ./fast-servo/linien_module_pipeline.patch
+            ./fast-servo/pid_pipeline.patch
+            ./fast-servo/pid_err_sig_pipeline.patch
+          ];
+      };
+
       patched-not-os = pkgs.applyPatches {
         name = "not-os-patched";
         src = not-os;
@@ -23,9 +51,42 @@
           ./not-os-patches/pr-29.patch
           ./not-os-patches/pr-30.patch
           ./not-os-patches/pr-31.patch
+          ./not-os-patches/pr-33.patch
+          ./not-os-patches/iproute2.patch
         ];
       };
 
+      crossSystem = {
+        system = "armv7l-linux";
+        linux-kernel = {
+          name = "zynq";
+          baseConfig = "multi_v7_defconfig";
+          target = "uImage";
+          installTarget = "uImage";
+          autoModules = false;
+          DTB = true;
+          makeFlags = [ "LOADADDR=0x8000" ];
+        };
+      };
+
+      crosspkgs-overlay = (self: super: {
+        pkgsCross = super.pkgsCross // {
+          zynq-baremetal = import super.path {
+            system = "x86_64-linux";
+            crossSystem = {
+              config = "arm-none-eabihf";
+              libc = "newlib";
+              gcc.cpu = "cortex-a9";
+              gcc.fpu = "vfpv3";
+            };
+          };
+          zynq-armv7l-linux = import super.path {
+            system = "x86_64-linux";
+            inherit crossSystem;
+          };
+        };
+      });
+
       migen = pkgs.python3Packages.buildPythonPackage rec {
         name = "migen";
         src = src-migen;
@@ -64,181 +125,209 @@
           freetype
           fontconfig
         ];
-        profile = "set -e; source /opt/Xilinx/Vivado/2022.2/settings64.sh";
+        profile = "set -e; source /opt/Xilinx/Vivado/2024.2/settings64.sh";
         runScript = "vivado";
       };
 
-      pyrp3 = pkgs.python3Packages.buildPythonPackage rec {
+      cma = pkgs-armv7l.python3Packages.buildPythonPackage rec {
+        pname = "cma";
+        version = "3.3.0";
+        src = pkgs.fetchFromGitHub {
+          owner = "CMA-ES";
+          repo = "pycma";
+          rev = "refs/tags/r${version}";
+          hash = "sha256-+UJI3hDVbDMfRF4bkwHED3eJCHzxS2hO4YPUzJqcoQI=";
+        };
+
+        propagatedBuildInputs = [ pkgs-armv7l.python3Packages.numpy ];
+
+        pythonImportsCheck = [ "cma" ];
+
+        checkPhase = ''
+          # At least one doctest fails, thus only limited amount of files is tested
+          python -m cma.test interfaces.py purecma.py logger.py optimization_tools.py transformations.py
+        '';
+      };
+
+      pyrp3 = pkgs-armv7l.python3Packages.buildPythonPackage rec {
         pname = "pyrp3";
-        version = "1.2.0";
-        pyproject = true;
+        version = "2.1.0";
+        format = "pyproject";
         src = pkgs.fetchFromGitHub {
           owner = "linien-org";
-          repo = "${pname}";
+          repo = "pyrp3";
           rev = "v${version}";
-          hash = "sha256-43TTlpJ5SMAjQM71bNVvrWQyciRXM3zpuA/Dw41AEgU=";
+          hash = "sha256-ol1QGXyCOei94iIPIocuTRHBxa5jKSH5RzjzROfZaBI=";
         };
-        nativeBuildInputs = with pkgs.python3Packages; [ setuptools wheel setuptools-scm ];
-        propagatedBuildInputs = with pkgs.python3Packages; [
-          myhdl
-          rpyc4
+        patches = ./fast-servo/linien-pyrp3-monitor.patch;
+        nativeBuildInputs = [
+          pkgs-armv7l.python3Packages.setuptools
+          pkgs-armv7l.gcc
+        ];
+        postInstall = ''
+          cp monitor/libmonitor.so $out/lib
+        '';
+        postFixup = ''
+          substituteInPlace $out/${pkgs.python3.sitePackages}/pyrp3/raw_memory.py \
+            --replace "libmonitor.so" "$out/lib/libmonitor.so"
+        '';
+        propagatedBuildInputs = with pkgs-armv7l.python3Packages; [
           cached-property
           numpy
+          rpyc
         ];
       };
 
-      linien-server = pkgs.python3Packages.buildPythonPackage rec {
-        pname = "linien-server";
+      linien-common = pkgs.python3Packages.buildPythonPackage rec {
+        pname = "linien-common";
+        inherit version;
         pyproject = true;
-        inherit (pkgs.python3Packages.linien-common) src version;
-        sourceRoot = "source/linien-server";
-        nativeBuildInputs = [ pkgs.python3Packages.setuptools ];
-        propagatedBuildInputs = with pkgs.python3Packages; [
-          appdirs
-          certifi
-          click
-          cma
-          pylpsd
-          pyrp3
-          requests
-          linien-common
-        ];
-      };
 
-      not-os-configured = (import patched-not-os {
-        inherit nixpkgs;
-        extraModules = [
-          "${patched-not-os}/zynq_image.nix"
-        ];
-        system = "x86_64-linux";
-        crossSystem.system = "armv7l-linux";
-      });
+        src = linien-src;
 
-      gnu-platform = "arm-none-eabi";
+        sourceRoot = "${src.name}/linien-common";
 
-      binutils-pkg = { zlib, extraConfigureFlags ? [] }: pkgs.stdenv.mkDerivation rec {
-        basename = "binutils";
-        version = "2.30";
-        name = "${basename}-${gnu-platform}-${version}";
-        src = pkgs.fetchurl {
-          url = "https://ftp.gnu.org/gnu/binutils/binutils-${version}.tar.bz2";
-          sha256 = "028cklfqaab24glva1ks2aqa1zxa6w6xmc8q34zs1sb7h22dxspg";
-        };
-        configureFlags = [
-          "--enable-deterministic-archives"
-          "--target=${gnu-platform}"
-          "--with-cpu=cortex-a9"
-          "--with-fpu=vfpv3"
-          "--with-float=hard"
-          "--with-mode=thumb"
-        ] ++ extraConfigureFlags;
-        outputs = [ "out" "info" "man" ];
-        depsBuildBuild = [ pkgs.buildPackages.stdenv.cc ];
-        buildInputs = [ zlib ];
-        enableParallelBuilding = true;
-        meta = {
-          description = "Tools for manipulating binaries (linker, assembler, etc.)";
-          longDescription = ''
-            The GNU Binutils are a collection of binary tools.  The main
-            ones are `ld' (the GNU linker) and `as' (the GNU assembler).
-            They also include the BFD (Binary File Descriptor) library,
-            `gprof', `nm', `strip', etc.
-          '';
-          homepage = http://www.gnu.org/software/binutils/;
-          license = pkgs.lib.licenses.gpl3Plus;
-          /* Give binutils a lower priority than gcc-wrapper to prevent a
-            collision due to the ld/as wrappers/symlinks in the latter. */
-          priority = "10";
-        };
-      };
-
-      gcc-pkg = { gmp, mpfr, libmpc, platform-binutils, extraConfigureFlags ? [] }: pkgs.stdenv.mkDerivation rec {
-        basename = "gcc";
-        version = "9.1.0";
-        name = "${basename}-${gnu-platform}-${version}";
-        src = pkgs.fetchurl {
-          url = "https://ftp.gnu.org/gnu/gcc/gcc-${version}/gcc-${version}.tar.xz";
-          sha256 = "1817nc2bqdc251k0lpc51cimna7v68xjrnvqzvc50q3ax4s6i9kr";
-        };
-        preConfigure = ''
-          mkdir build
-          cd build
+        preBuild = ''
+          export HOME=$(mktemp -d)
         '';
-        configureScript = "../configure";
-        configureFlags = [ 
-          "--target=${gnu-platform}"
-          "--with-arch=armv7-a"
-          "--with-tune=cortex-a9"
-          "--with-fpu=vfpv3"
-          "--with-float=hard"
-          "--disable-libssp"
-          "--enable-languages=c"
-          "--with-as=${platform-binutils}/bin/${gnu-platform}-as"
-          "--with-ld=${platform-binutils}/bin/${gnu-platform}-ld" ] ++ extraConfigureFlags;
-        outputs = [ "out" "info" "man" ];
-        hardeningDisable = [ "format" "pie" ];
-        propagatedBuildInputs = [ gmp mpfr libmpc platform-binutils ];
-        enableParallelBuilding = true;
-        dontFixup = true;
-      };
 
-      newlib-pkg = { platform-binutils, platform-gcc }: pkgs.stdenv.mkDerivation rec {
-        pname = "newlib";
-        version = "3.1.0";
-        src = pkgs.fetchurl {
-          url = "ftp://sourceware.org/pub/newlib/newlib-${version}.tar.gz";
-          sha256 = "0ahh3n079zjp7d9wynggwrnrs27440aac04340chf1p9476a2kzv";
-        };
-        nativeBuildInputs = [ platform-binutils platform-gcc ];
-        configureFlags = [
-          "--target=${gnu-platform}"
+        nativeBuildInputs = [ pkgs.python3Packages.setuptools ];
 
-          "--with-cpu=cortex-a9"
-          "--with-fpu=vfpv3"
-          "--with-float=hard"
-          "--with-mode=thumb"
-          "--enable-interwork"
-          "--disable-multilib"
+        pythonRelaxDeps = [ "importlib-metadata" ];
 
-          "--disable-newlib-supplied-syscalls"
-          "--with-gnu-ld"
-          "--with-gnu-as"
-          "--disable-newlib-io-float"
-          "--disable-werror"
+        propagatedBuildInputs = with pkgs.python3Packages; [
+          importlib-metadata
+          numpy
+          rpyc
+          scipy
+          appdirs
         ];
-        dontFixup = true;
+
+        pythonImportsCheck = [ "linien_common" ];
       };
       
-      gnutoolchain = rec {
-        binutils-bootstrap = pkgs.callPackage binutils-pkg { };
-        gcc-bootstrap = pkgs.callPackage gcc-pkg {
-          platform-binutils = binutils-bootstrap;
-          extraConfigureFlags = [ "--disable-libgcc" ];
-        };
-        newlib = pkgs.callPackage newlib-pkg {
-          platform-binutils = binutils-bootstrap;
-          platform-gcc = gcc-bootstrap;
-        };
-        binutils = pkgs.callPackage binutils-pkg {
-          extraConfigureFlags = [ "--with-lib-path=${newlib}/arm-none-eabi/lib" ];
-        };
-        gcc = pkgs.callPackage gcc-pkg {
-          platform-binutils = binutils;
-          extraConfigureFlags = [ "--enable-newlib" "--with-headers=${newlib}/arm-none-eabi/include" ];
+      linien-common-armv7l = pkgs-armv7l.python3Packages.buildPythonPackage rec {
+        pname = "linien-common-armv7l";
+        inherit version;
+        pyproject = true;
+
+        src = linien-src;
+
+        sourceRoot = "${src.name}/linien-common";
+
+        preBuild = ''
+          export HOME=$(mktemp -d)
+        '';
+
+        nativeBuildInputs = [ pkgs-armv7l.python3Packages.setuptools ];
+
+        pythonRelaxDeps = [ "importlib-metadata" ];
+
+        propagatedBuildInputs = with pkgs-armv7l.python3Packages; [
+          importlib-metadata
+          numpy
+          rpyc
+          scipy
+          appdirs
+        ];
+
+        pythonImportsCheck = [ "linien_common" ];
+      };
+
+      linien-client = pkgs.python3Packages.buildPythonPackage rec {
+        pname = "linien-client";
+        inherit version;
+        src = linien-src;
+        
+        pyproject = true;
+
+        sourceRoot = "${src.name}/linien-client";
+
+        preBuild = ''
+          export HOME=$(mktemp -d)
+        '';
+
+        nativeBuildInputs = [ pkgs.python3Packages.setuptools ];
+
+        doInstallCheck = false;
+        doCheck = false;
+        propagatedBuildInputs = with pkgs.python3Packages; [
+          fabric
+          typing-extensions
+        ] ++ [ linien-common ];
+
+        pythonImportsCheck = [ "linien_client" ];
+
         };
+
+      linien-gui = pkgs.python3Packages.buildPythonApplication rec {
+        pname = "linien-gui";
+        inherit version;
+        src = linien-src;
+        pyproject = true;
+
+        sourceRoot = "${src.name}/linien-gui";
+        nativeBuildInputs = with pkgs.python3Packages; [
+          setuptools
+        ] ++ [
+          pkgs.qt5.wrapQtAppsHook
+        ];
+
+        patches = [
+          ./fast-servo/linien-gui-fast-servo-rm-ota-update.patch
+        ];
+
+        # Makes qt-wayland appear in the qt paths injected by the wrapper - helps users
+        # with `QT_QPA_PLATFORM=wayland` in their environment.
+        buildInputs = [
+          pkgs.qt5.qtwayland
+        ];
+
+        propagatedBuildInputs = with pkgs.python3Packages; [
+          click
+          pyqtgraph
+          pyqt5
+          requests
+          superqt
+        ] ++ [ linien-client ];
+
+        dontWrapQtApps = true;
+
+        preFixup = ''
+          makeWrapperArgs+=("''${qtWrapperArgs[@]}")
+        '';
+      };
+
+      linien-server = pkgs-armv7l.python3Packages.buildPythonPackage rec {
+        pname = "linien-server";
+        inherit version;
+        src = linien-src;
+        pyproject = true;
+
+        sourceRoot = "${src.name}/linien-server";
+
+        postPatch = ''
+          cp ${fast-servo-gateware}/csrmap.py linien_server/csrmap.py
+          substituteInPlace linien_server/acquisition.py \
+            --replace "  start_nginx()" "" \
+            --replace "  stop_nginx()" "" \
+            --replace "  flash_fpga()" ""
+        '';
+        nativeBuildInputs = [ pkgs-armv7l.python3Packages.setuptools ];
+        propagatedBuildInputs = with pkgs-armv7l.python3Packages; [
+          fire
+          influxdb-client
+          pylpsd
+        ] ++ [ 
+          linien-common-armv7l
+          cma
+          pyrp3
+        ];
       };
 
       fast-servo-gateware = pkgs.stdenv.mkDerivation rec {
         name = "fast-servo-gateware";
-        inherit (pkgs.python3Packages.linien-common) src;
-        prePatch = ''
-          mkdir -p fast_servo/gateware
-          cp -r ${./fast-servo/linien-gateware}/. fast_servo/gateware
-        '';
-        patches = [
-          fast-servo/linien-fast-servo-gateware.patch
-          fast-servo/linien-fast-servo-server.patch
-        ];
+        src = linien-src;
         nativeBuildInputs = [
           (pkgs.python3.withPackages(ps: [
             migen misoc
@@ -260,11 +349,33 @@
           mkdir -p $out $out/nix-support
           cp gateware/build/top.bit $out
           cp linien-server/linien_server/gateware.bin $out
+          cp linien-server/linien_server/csrmap.py $out
           echo file binary-dist $out/top.bit >> $out/nix-support/hydra-build-products
           echo file binary-dist $out/gateware.bin >> $out/nix-support/hydra-build-products
         '';
       };
 
+      pyfastservo = pkgs-armv7l.python3Packages.buildPythonPackage rec {
+        name = "pyfastservo";
+        src = ./fast-servo;
+        preBuild = ''
+          cat > setup.py << EOF
+          from setuptools import setup
+
+          setup(
+            name="pyfastservo",
+            packages=["pyfastservo"],
+            install_requires=["spidev", "smbus2"],
+            entry_points = {"console_scripts": ["fp_leds=pyfastservo.fp_leds:main"]},
+          )
+          EOF
+        '';
+        propagatedBuildInputs = with pkgs-armv7l.python3Packages; [
+          spidev
+          smbus2
+        ];
+      };
+
       mkbootimage = pkgs.stdenv.mkDerivation {
         pname = "mkbootimage";
         version = "2.3dev";
@@ -289,6 +400,37 @@
       };
 
       board-package-set = { board }: let
+        not-os-configured = (import patched-not-os {
+          inherit nixpkgs;
+          extraModules = [
+            "${patched-not-os}/zynq_image.nix"
+          ] ++ pkgs.lib.optionals (board == "fast-servo") [
+            ({ config, pkgs, lib, ... }: {
+              environment.systemPackages = [
+                linien-server
+                (pkgs.python3.withPackages(ps: [ pyfastservo ]))
+              ];
+              boot.postBootCommands = lib.mkAfter ''
+
+                # Program the FPGA
+                set +x
+                echo "Loading bitstream into SRAM..."
+                echo 0 > /sys/class/fpga_manager/fpga0/flags
+                mkdir -p /lib/firmware
+                cp ${fast-servo-gateware}/gateware.bin /lib/firmware/
+                echo gateware.bin > /sys/class/fpga_manager/fpga0/firmware
+
+                # Run device init scripts
+                echo "Initializing clock generator, ADC, and DAC..."
+                python3 -m pyfastservo.initialize
+              '';
+            })];
+          system = "x86_64-linux";
+          inherit crossSystem;
+        });
+
+        not-os-build = not-os-configured.config.system.build;
+
         fsbl = pkgs.stdenv.mkDerivation {
           name = "${board}-fsbl";
           src = pkgs.fetchFromGitHub {
@@ -298,9 +440,8 @@
             sha256 = "sha256-UDz9KK/Hw3qM1BAeKif30rE8Bi6C2uvuZlvyvtJCMfw=";
           };
           nativeBuildInputs = [
-            pkgs.gnumake
-            gnutoolchain.binutils
-            gnutoolchain.gcc
+            pkgs.pkgsCross.zynq-baremetal.buildPackages.binutils
+            pkgs.pkgsCross.zynq-baremetal.buildPackages.gcc
           ];
           postUnpack = ''
             mkdir -p $sourceRoot/lib/sw_apps/zynq_fsbl/misc/fast-servo
@@ -310,7 +451,11 @@
           patches = [] ++ pkgs.lib.optional (board == "fast-servo") ./fast-servo/fsbl.patch;
           postPatch = ''
             patchShebangs lib/sw_apps/zynq_fsbl/misc/copy_bsp.sh
-            echo 'SEARCH_DIR("${gnutoolchain.newlib}/arm-none-eabi/lib");' >> lib/sw_apps/zynq_fsbl/src/lscript.ld
+
+            for x in lib/sw_apps/zynq_fsbl/src/Makefile lib/sw_apps/zynq_fsbl/misc/copy_bsp.sh lib/bsp/standalone/src/arm/cortexa9/gcc/Makefile; do
+              substituteInPlace $x \
+                --replace "arm-none-eabi-" "arm-none-eabihf-"
+            done
           '';
           buildPhase = ''
             cd lib/sw_apps/zynq_fsbl/src
@@ -324,9 +469,8 @@
           dontFixup = true;
         };
 
-        u-boot = let
-          fast-servo-dts = fast-servo/fast-servo.dts;
-          in (pkgs.pkgsCross.armv7l-hf-multiplatform.buildUBoot {
+        u-boot = (pkgs-armv7l.buildUBoot {
+            name = "${board}-u-boot";
             defconfig = "xilinx_zynq_virt_defconfig";
             patches = [] ++ pkgs.lib.optional (board == "fast-servo") ./fast-servo/u-boot.patch;
             preConfigure = ''
@@ -336,7 +480,7 @@
               CONFIG_SYS_PROMPT="${board}-boot> "
               CONFIG_AUTOBOOT=y
               CONFIG_BOOTCOMMAND="${builtins.replaceStrings [ "\n" ] [ "; " ] ''
-                setenv bootargs 'root=/dev/mmcblk0p2 console=ttyPS0,115200n8 systemConfig=${builtins.unsafeDiscardStringContext not-os-cfg.build.toplevel}'
+                setenv bootargs 'root=/dev/mmcblk0p2 console=ttyPS0,115200n8 systemConfig=${builtins.unsafeDiscardStringContext not-os-build.toplevel}'
                 fatload mmc 0 0x6400000 uImage
                 fatload mmc 0 0x8000000 ${board}.dtb
                 fatload mmc 0 0xA400000 uRamdisk.image.gz
@@ -349,7 +493,7 @@
             filesToInstall = [ "u-boot.elf" ];
           }).overrideAttrs (oldAttrs: {
             postUnpack = ''
-              cp ${fast-servo-dts} $sourceRoot/arch/arm/dts/zynq-fast-servo.dts
+              cp ${fast-servo/fast-servo.dts} $sourceRoot/arch/arm/dts/zynq-fast-servo.dts
             '';
             postInstall = ''
               mkdir -p $out/dts
@@ -380,7 +524,7 @@
             echo file binary-dist $out/boot.bin >> $out/nix-support/hydra-build-products
           '';
 
-        dtb = pkgs.runCommand "dtb"
+        dtb = pkgs.runCommand "${board}-dtb"
           {
             buildInputs = [ pkgs.gcc pkgs.dtc ];
           }
@@ -400,14 +544,14 @@
 
         sd-image = let
           rootfsImage = pkgs.callPackage (pkgs.path + "/nixos/lib/make-ext4-fs.nix") {
-            storePaths = [ not-os-cfg.build.toplevel ];
+            storePaths = [ not-os-build.toplevel ];
             volumeLabel = "ROOT";
           };
           # Current firmware (kernel, bootimage, etc..) takes ~18MB
           firmwareSize = 30;
           firmwarePartitionOffset = 8;
           in pkgs.stdenv.mkDerivation {
-            name = "sd-image";
+            name = "${board}-sd-image";
             nativeBuildInputs = with pkgs; [ dosfstools mtools libfaketime util-linux parted ];
             buildCommand = ''
               mkdir -p $out/nix-support $out/sd-image
@@ -441,8 +585,8 @@
               mkdir firmware
               cp ${bootimage}/boot.bin firmware/
               cp ${dtb}/${board}.dtb firmware/
-              cp ${not-os-cfg.build.kernel}/uImage firmware/
-              cp ${not-os-cfg.build.uRamdisk}/initrd firmware/uRamdisk.image.gz
+              cp ${not-os-build.kernel}/uImage firmware/
+              cp ${not-os-build.uRamdisk}/initrd firmware/uRamdisk.image.gz
 
               (cd firmware; mcopy -psvm -i ../firmware_part.img ./* ::)
               dd conv=notrunc if=firmware_part.img of=$img seek=$START count=$SECTORS
@@ -455,7 +599,9 @@
             export PATH=${pkgs.qemu}/bin:$PATH
             IMGDIR=$(mktemp -d /tmp/not-os-qemu-XXXXXX)
             BASE=$(realpath $(dirname $0))
-            qemu-img create -F raw -f qcow2 -b $BASE/sd-image.img $IMGDIR/sd-overlay.qcow2 512M
+
+            qemu-img convert -O qcow2 -f raw -o preallocation=metadata $BASE/sd-image.img $IMGDIR/sd-sparse.qcow2
+            qemu-img create -F qcow2 -f qcow2 -b $IMGDIR/sd-sparse.qcow2 $IMGDIR/sd-overlay.qcow2 2G
 
             # Some command arguments are based from samples in Xilinx QEMU User Documentation
             # See: https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/821854273/Running+Bare+Metal+Applications+on+QEMU
@@ -470,7 +616,7 @@
 
             rm -rf $IMGDIR
           '';
-          in pkgs.runCommand "not-os-qemu" {
+          in pkgs.runCommand "${board}-qemu" {
             inherit qemuScript;
             passAsFile = [ "qemuScript" ];
             preferLocalBuild = true;
@@ -493,6 +639,13 @@
         "${board}-qemu" = not-os-qemu;
       };
     in rec {
+      devShell.x86_64-linux = pkgs.mkShell {
+        name = "nix-servo-dev_shell";
+        buildInputs = with pkgs.python3Packages; [ 
+          matplotlib
+        ] ++ [ linien-common linien-client linien-gui ];
+      };
+
       packages.x86_64-linux = {
         inherit mkbootimage;
         inherit migen misoc vivado;

not-os-patches/iproute2.patch

@@ -0,0 +1,13 @@
+diff --git a/system-path.nix b/system-path.nix
+index 490197d..93e940a 100644
+--- a/system-path.nix
++++ b/system-path.nix
+@@ -6,7 +6,7 @@
+ with lib;
+ 
+ let
+-  requiredPackages = with pkgs; [ utillinux coreutils iproute iputils procps bashInteractive runit ];
++  requiredPackages = with pkgs; [ utillinux coreutils iproute2 iputils procps bashInteractive runit ];
+ in
+ {
+   options = {

not-os-patches/network.patch

@@ -1,5 +1,5 @@
 diff --git a/configuration.nix b/configuration.nix
-index 010c487..e1e85ba 100644
+index 010c487..2d08009 100644
 --- a/configuration.nix
 +++ b/configuration.nix
 @@ -1,4 +1,4 @@
@@ -8,7 +8,7 @@ index 010c487..e1e85ba 100644
  
  {
    imports = [ ./qemu.nix ];
-@@ -7,10 +7,15 @@
+@@ -7,10 +7,16 @@
    environment.etc = {
      "ssh/authorized_keys.d/root" = {
        text = ''
@@ -18,6 +18,7 @@ index 010c487..e1e85ba 100644
 +        ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBNdIiLvP2hmDUFyyE0oLOIXrjrMdWWpBV9/gPR5m4AiARx4JkufIDZzmptdYQ5FhJORJ4lluPqp7dAmahoSwg4lv9Di0iNQpHMJvNGZLHYKM1H1FWCCFIEDJ8bD4SVfrDg== root
 +        ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBF/YybP+fQ0J+bNqM5Vgx5vDmVqVWsgUdF1moUxghv7d73GZAFaM6IFBdrXTAa33AwnWwDPMrTgP1V6SXBkb3ciJo/lD1urJGbydbSI5Ksq9d59wvOeANvyWYrQw6+eqTQ== sb
 +        ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBFkmOCQ3BQh3qUjLtfdqyeBsx8rkk/QYlzB0TMrnfn6waLN6yKfPC3WVFv4zN5kNKb/OayvqDa+zfkKe85e/oIPQQKflF7GrCHdssz33DCnW90cz532E6iqG1pjeZjID2A== flo
++        ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICAranL376soiSJ0kxdYNrwElcaZPW1heLFjs8Y7n0jT linuswck
        '';
        mode = "0444";
      };
@@ -27,11 +28,15 @@ index 010c487..e1e85ba 100644
    };
  }
 diff --git a/runit.nix b/runit.nix
-index d7b0bf3..67cff43 100644
+index d7b0bf3..14dd437 100644
 --- a/runit.nix
 +++ b/runit.nix
-@@ -7,8 +7,8 @@ let
-     Port 22
+@@ -4,11 +4,11 @@ let
+   sshd_config = pkgs.writeText "sshd_config" ''
+     HostKey /etc/ssh/ssh_host_rsa_key
+     HostKey /etc/ssh/ssh_host_ed25519_key
+-    Port 22
++    Port 3030
      PidFile /run/sshd.pid
      Protocol 2
 -    PermitRootLogin yes

not-os-patches/pr-28.patch

@@ -1,5 +1,5 @@
 diff --git a/base.nix b/base.nix
-index 7eaee32..3a2a0a9 100644
+index 7eaee32..9aa338e 100644
 --- a/base.nix
 +++ b/base.nix
 @@ -27,6 +27,11 @@ with lib;
@@ -14,9 +14,12 @@ index 7eaee32..3a2a0a9 100644
      not-os.simpleStaticIp = mkOption {
        type = types.bool;
        default = false;
-@@ -86,15 +91,25 @@ with lib;
+@@ -84,17 +89,25 @@ with lib;
+     };
+     environment.etc = {
        "nix/nix.conf".source = pkgs.runCommand "nix.conf" {} ''
-         extraPaths=$(for i in $(cat ${pkgs.writeReferencesToFile pkgs.runtimeShell}); do if test -d $i; then echo $i; fi; done)
+-        extraPaths=$(for i in $(cat ${pkgs.writeReferencesToFile pkgs.runtimeShell}); do if test -d $i; then echo $i; fi; done)
++        extraPaths=$(for i in $(cat ${pkgs.writeClosure [ pkgs.bash ]}); do if test -d $i; then echo $i; fi; done)
          cat > $out << EOF
 -        build-use-sandbox = true
 +        auto-optimise-store = true
@@ -28,8 +31,6 @@ index 7eaee32..3a2a0a9 100644
 +        extra-sandbox-paths = /bin/sh=${pkgs.runtimeShell} $(echo $extraPaths)
 +        max-jobs = auto
 +        sandbox = true
-+        substituters = https://cache.armv7l.xyz
-+        trusted-public-keys = cache.armv7l.xyz-1:kBY/eGnBAYiqYfg0fy0inWhshUo+pGFM3Pj7kIkmlBk=
 +        trusted-users = root
          EOF
        '';
@@ -151,10 +152,10 @@ index c61f9d6..fbdf0fd 100644
    };
  }
 diff --git a/zynq_image.nix b/zynq_image.nix
-index 3fa23ab..e2e3871 100644
+index 3fa23ab..069fe89 100644
 --- a/zynq_image.nix
 +++ b/zynq_image.nix
-@@ -1,66 +1,102 @@
+@@ -1,66 +1,89 @@
 -{ config, pkgs, ... }:
 +{ lib, config, pkgs, ... }:
  
@@ -163,22 +164,7 @@ index 3fa23ab..e2e3871 100644
 -  # dont use overlays for the qemu, it causes a lot of wasted time on recompiles
 -  x86pkgs = import pkgs.path { system = "x86_64-linux"; };
 -  customKernel = pkgs.linux.override {
-+  crosspkgs = import pkgs.path {
-+    system = "x86_64-linux";
-+    crossSystem = {
-+      system = "armv7l-linux";
-+      linux-kernel = {
-+        name = "zynq";
-+        baseConfig = "multi_v7_defconfig";
-+        target = "uImage";
-+        installTarget = "uImage";
-+        autoModules = false;
-+        DTB = true;
-+        makeFlags = [ "LOADADDR=0x8000" ];
-+      };
-+    };
-+  };
-+  customKernel = (crosspkgs.linux.override {
++  customKernel = (pkgs.linux_6_6.override {
      extraConfig = ''
        OVERLAY_FS y
 +      MEDIA_SUPPORT n
@@ -195,14 +181,15 @@ index 3fa23ab..e2e3871 100644
 +      OF_OVERLAY y
      '';
 -  };
--  customKernelPackages = pkgs.linuxPackagesFor customKernel;
 +  }).overrideAttrs (oa: {
 +    postInstall = ''
-+      cp arch/arm/boot/uImage $out
++      if [ -e arch/arm/boot/uImage ]; then
++        cp arch/arm/boot/uImage $out
++      fi
 +      ${oa.postInstall}
 +    '';
 +  });
-+  customKernelPackages = crosspkgs.linuxPackagesFor customKernel;
+   customKernelPackages = pkgs.linuxPackagesFor customKernel;
  in {
    imports = [ ./arm32-cross-fixes.nix ];
    boot.kernelPackages = customKernelPackages;
@@ -253,17 +240,17 @@ index 3fa23ab..e2e3871 100644
 -    chmod +x qemu-script
 -    patchShebangs qemu-script
 -    ls -ltrh
-   '';
+-  '';
 -  system.build.rpi_image_tar = pkgs.runCommand "dist.tar" {} ''
 -    mkdir -p $out/nix-support
 -    tar -cvf $out/dist.tar ${config.system.build.rpi_image}
 -    echo "file binary-dist $out/dist.tar" >> $out/nix-support/hydra-build-products
--  '';
+   '';
 -  environment.systemPackages = [ pkgs.strace ];
 -  environment.etc."service/getty/run".source = pkgs.writeShellScript "getty" ''
 -    agetty ttyPS0 115200
 +  environment = {
-+    systemPackages = with pkgs; [ inetutils wget nano ];
++    systemPackages = with pkgs; [ inetutils wget gnugrep nano vim ];
 +    etc = {
 +      "service/getty/run".source = pkgs.writeShellScript "getty" ''
 +        hostname ${config.networking.hostName}