README.md

@@ -1,21 +0,0 @@
-# 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

@@ -1,66 +0,0 @@
-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 "system-top.dts"
+# 0 "my_dts/system-top.dts"
 # 0 "<built-in>"
 # 0 "<command-line>"
-# 1 "system-top.dts"
+# 1 "my_dts/system-top.dts"
 
 
 
@@ -10,8 +10,8 @@
 
 
 /dts-v1/;
-# 1 "zynq-7000.dtsi" 1
-# 15 "zynq-7000.dtsi"
+# 1 "my_dts/zynq-7000.dtsi" 1
+# 15 "my_dts/zynq-7000.dtsi"
 / {
  #address-cells = <1>;
  #size-cells = <1>;
@@ -564,8 +564,8 @@
   };
  };
 };
-# 10 "system-top.dts" 2
-# 1 "pcw.dtsi" 1
+# 10 "my_dts/system-top.dts" 2
+# 1 "my_dts/pcw.dtsi" 1
 
 
 
@@ -641,48 +641,7 @@
  fclk-enable = <0x0>;
  ps-clk-frequency = <33333333>;
 };
-# 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
+# 11 "my_dts/system-top.dts" 2
 / {
  model = "Sinara Fast Servo board";
  chosen {

fast-servo/iir_pipeline.patch

@@ -1,13 +0,0 @@
-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

@@ -1,31 +0,0 @@
-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

@@ -1,15 +0,0 @@
-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

@@ -0,0 +1,38 @@
+# 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-fast-servo-server.patch

@@ -1,42 +1,3 @@
-# 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:
@@ -55,27 +16,41 @@ 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 c3e20e7..ebead1d 100644
+index 6c34429..a0b12d0 100644
 --- a/gateware/fpga_image_helper.py
 +++ b/gateware/fpga_image_helper.py
-@@ -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)
+@@ -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>
  #
- # 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
+ # 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]
  
  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")
@@ -90,7 +65,7 @@ index c3e20e7..ebead1d 100644
      fil.write("}\n\n")
  
  
-@@ -51,26 +54,51 @@ def get_csrmap(banks):
+@@ -52,26 +55,49 @@ def get_csrmap(banks):
  def py_csrmap(it, fil):
      fil.write("csr = {\n")
      for reg in it:
@@ -109,7 +84,7 @@ index c3e20e7..ebead1d 100644
 -    platform = Platform()
 -    root = RootModule(platform)
 +    import argparse
-+
+ 
 +    parser = argparse.ArgumentParser()
 +    parser.add_argument("-p", "--platform", default=None)
 +    args = parser.parse_args()
@@ -128,11 +103,10 @@ index c3e20e7..ebead1d 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:
@@ -143,7 +117,7 @@ index c3e20e7..ebead1d 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)
@@ -154,14 +128,14 @@ 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
-@@ -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)
+@@ -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>
  #
- # Linien is free software: you can redistribute it and/or modify
- # it under the terms of the GNU General Public License as published by
+ # This file is part of Linien and based on redpid.
+ #
 @@ -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-Firmware](https://github.com/elhep/Fast-Servo-Firmware/tree/master/fast_servo/gateware).
+Files in this directory were copied from [elhep/Fast-Servo-Frimware](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

@@ -20,15 +20,13 @@
 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()
@@ -43,83 +41,59 @@ 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(
-                "MMCME2_ADV",
+                "PLLE2_BASE",
                 p_BANDWIDTH="OPTIMIZED",
                 p_DIVCLK_DIVIDE=1,
                 p_CLKFBOUT_PHASE=0.0,
-                p_CLKFBOUT_MULT_F=4,  # VCO @ 800 MHz
+                p_CLKFBOUT_MULT=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") | self.mmcm_rst,
+                i_RST=ResetSignal("sys"),
                 i_CLKFBIN=clk_feedback_buf,
                 o_CLKFBOUT=clk_feedback,
-
-                p_CLKOUT0_USE_FINE_PS="TRUE",
-                p_CLKOUT0_DIVIDE_F=8,
-                p_CLKOUT0_PHASE=45.0,
+                p_CLKOUT0_DIVIDE=4,
+                p_CLKOUT0_PHASE=0.0,
                 p_CLKOUT0_DUTY_CYCLE=0.5,
-                o_CLKOUT0=clk_dco2d_45_degree,  # 100 MHz <- dco_clk / 2 = 200 MHz / 2
-                o_LOCKED=self.locked,
-
+                o_CLKOUT0=clk_dco,  # 200 MHz <- dco_clk
                 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
-                
-                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,
+                o_LOCKED=self.locked,
             )
         ]
 
         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(5)
+        self.frame_csr = CSRStatus(4)
         self.data_ch0 = CSRStatus(16)
         self.data_ch1 = CSRStatus(16)
 
         self.tap_delay = CSRStorage(5)
         self.bitslip_csr = CSRStorage(1)
 
-        self.afe_ctrl = CSRStorage(7)
+        self.afe_ctrl = CSRStorage(4)
 
         tap_delay_val = Signal(5)
         bitslip = Signal()
@@ -131,17 +105,7 @@ 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")),
-        ]
 
         ###
 
@@ -153,14 +117,11 @@ 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[0:4]
+                self.afe_ctrl.storage
             ),
         ]
 
-        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.submodules._crg = _CRG(platform, dco_clk, dco_freq)
 
         self.specials += MultiReg(self.bitslip_csr.re, bitslip_re_dco_2d, "dco2d")
         self.sync.dco2d += [
@@ -168,8 +129,7 @@ class ADC(Module, AutoCSR):
         ]
 
         self.comb += [
-            self.frame_csr.status[0:4].eq(self.s_frame[0:4]),
-            self.frame_csr.status[4].eq(self.crg.locked),
+            self.frame_csr.status.eq(self.s_frame),
             self.data_ch0.status.eq(self.data_out[0]),
             self.data_ch1.status.eq(self.data_out[1]),
         ]
@@ -186,7 +146,7 @@ class ADC(Module, AutoCSR):
 
         self.specials += Instance(
             "LTC2195",
-            i_rst_in=ResetSignal("dco2d"),
+            i_rst_in=ResetSignal("sys"),
             i_clk200=ClockSignal("idelay"),
             i_DCO=ClockSignal("dco"),
             i_DCO_2D=ClockSignal("dco2d"),
@@ -198,9 +158,9 @@ 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_cdc[1],        # LANES swapped on hardware
-            o_ADC1_out=self.data_out_cdc[0],
-            o_FR_out=self.s_frame_cdc,
+            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_o_data_from_pins=dummy,
             o_idelay_rdy=dummy_idelay_rdy,
         )

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

@@ -20,7 +20,6 @@
 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):
@@ -39,51 +38,37 @@ 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("dco2d")),
+            dac_pads.rst.eq(ResetSignal("sys")),
             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.data_in_csr_cdc[0], self.data_in_cdc[0])
+                Mux(manual_override, self.output_value_ch0.storage, self.data_in[0])
             ),
             output_data_ch1.eq(
-                Mux(manual_override, self.data_in_csr_cdc[1], self.data_in_cdc[1])
+                Mux(manual_override, self.output_value_ch1.storage, self.data_in[1])
             ),
         ]
 
-        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")
+        # 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"),
+        )
 
 
 class AUX_DAC_CTRL(Module, AutoCSR):

fast-servo/linien-gateware/fast_servo_soc.py

@@ -147,7 +147,6 @@ 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

@@ -1,227 +0,0 @@
-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

@@ -1,43 +0,0 @@
-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

@@ -1,95 +0,0 @@
-# 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

@@ -1,22 +0,0 @@
-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

@@ -1,26 +0,0 @@
-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

@@ -1,57 +0,0 @@
-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

@@ -1,19 +0,0 @@
-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

@@ -1,64 +0,0 @@
-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

@@ -1,5 +0,0 @@
-## 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

@@ -1,224 +0,0 @@
-# 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

@@ -1,120 +0,0 @@
-# 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

@@ -1,168 +0,0 @@
-# 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

@@ -1,66 +0,0 @@
-# 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

@@ -1,28 +0,0 @@
-# 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

@@ -1,280 +0,0 @@
-# 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": 1734323986,
-        "narHash": "sha256-m/lh6hYMIWDYHCAsn81CDAiXoT3gmxXI9J987W5tZrE=",
+        "lastModified": 1709237383,
+        "narHash": "sha256-cy6ArO4k5qTx+l5o+0mL9f5fa86tYUX3ozE1S+Txlds=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "394571358ce82dff7411395829aa6a3aad45b907",
+        "rev": "1536926ef5621b09bba54035ae2bb6d806d72ac8",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-24.11",
+        "ref": "nixos-unstable",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -64,11 +64,11 @@
     "src-migen": {
       "flake": false,
       "locked": {
-        "lastModified": 1727677091,
-        "narHash": "sha256-Zg3SQnTwMM/VkOGKogbPyuCC2NhLy8HB2SPEUWWNgCU=",
+        "lastModified": 1702942348,
+        "narHash": "sha256-gKIfHZxsv+jcgDFRW9mPqmwqbZXuRvXefkZcSFjOGHw=",
         "owner": "m-labs",
         "repo": "migen",
-        "rev": "c19ae9f8ae162ffe2d310a92bfce53ac2a821bc8",
+        "rev": "50934ad10a87ade47219b796535978b9bdf24023",
         "type": "github"
       },
       "original": {
@@ -80,11 +80,11 @@
     "src-misoc": {
       "flake": false,
       "locked": {
-        "lastModified": 1729234629,
-        "narHash": "sha256-TLsTCXV5AC2xh+bS7EhBVBKqdqIU3eKrnlWcFF9LtAM=",
+        "lastModified": 1699352904,
+        "narHash": "sha256-SglyTmXOPv8jJOjwAjJrj/WhAkItQfUbvKfUqrynwRg=",
         "ref": "refs/heads/master",
-        "rev": "6085a312bca26adeca6584e37d08c8ba2e1d6e38",
-        "revCount": 2460,
+        "rev": "a53859f2167c31ab5225b6c09f30cf05527b94f4",
+        "revCount": 2452,
         "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-24.11;
+  inputs.nixpkgs.url = github:NixOS/nixpkgs/nixos-unstable;
   inputs.not-os.url = github:cleverca22/not-os;
   inputs.not-os.inputs.nixpkgs.follows = "nixpkgs";
 
@@ -10,38 +10,10 @@
 
   outputs = { self, nixpkgs, not-os, src-migen, src-misoc }:
     let
-      pkgs = import nixpkgs { system = "x86_64-linux"; overlays = [ crosspkgs-overlay ]; };
-      pkgs-armv7l = pkgs.pkgsCross.zynq-armv7l-linux;
+      pkgs = import nixpkgs { system = "x86_64-linux"; };
+      not-os-cfg = not-os-configured.config.system;
       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;
@@ -51,42 +23,9 @@
           ./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;
@@ -125,209 +64,144 @@
           freetype
           fontconfig
         ];
-        profile = "set -e; source /opt/Xilinx/Vivado/2024.2/settings64.sh";
+        profile = "set -e; source /opt/Xilinx/Vivado/2022.2/settings64.sh";
         runScript = "vivado";
       };
 
-      cma = pkgs-armv7l.python3Packages.buildPythonPackage rec {
-        pname = "cma";
-        version = "3.3.0";
-        src = pkgs.fetchFromGitHub {
-          owner = "CMA-ES";
-          repo = "pycma";
-          rev = "refs/tags/r${version}";
-          hash = "sha256-+UJI3hDVbDMfRF4bkwHED3eJCHzxS2hO4YPUzJqcoQI=";
+      not-os-configured = (import patched-not-os {
+        inherit nixpkgs;
+        extraModules = [
+          "${patched-not-os}/zynq_image.nix"
+        ];
+        system = "x86_64-linux";
+        crossSystem.system = "armv7l-linux";
+      });
+
+      gnu-platform = "arm-none-eabi";
+
+      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";
         };
-
-        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 = "2.1.0";
-        format = "pyproject";
-        src = pkgs.fetchFromGitHub {
-          owner = "linien-org";
-          repo = "pyrp3";
-          rev = "v${version}";
-          hash = "sha256-ol1QGXyCOei94iIPIocuTRHBxa5jKSH5RzjzROfZaBI=";
+      gcc-pkg = { gmp, mpfr, libmpc, platform-binutils, extraConfigureFlags ? [] }: pkgs.stdenv.mkDerivation rec {
+        basename = "gcc";
+        version = "9.1.0";
+        name = "${basename}-${gnu-platform}-${version}";
+        src = pkgs.fetchurl {
+          url = "https://ftp.gnu.org/gnu/gcc/gcc-${version}/gcc-${version}.tar.xz";
+          sha256 = "1817nc2bqdc251k0lpc51cimna7v68xjrnvqzvc50q3ax4s6i9kr";
         };
-        patches = ./fast-servo/linien-pyrp3-monitor.patch;
-        nativeBuildInputs = [
-          pkgs-armv7l.python3Packages.setuptools
-          pkgs-armv7l.gcc
-        ];
-        postInstall = ''
-          cp monitor/libmonitor.so $out/lib
+        preConfigure = ''
+          mkdir build
+          cd build
         '';
-        postFixup = ''
-          substituteInPlace $out/${pkgs.python3.sitePackages}/pyrp3/raw_memory.py \
-            --replace "libmonitor.so" "$out/lib/libmonitor.so"
-        '';
-        propagatedBuildInputs = with pkgs-armv7l.python3Packages; [
-          cached-property
-          numpy
-          rpyc
-        ];
+        configureScript = "../configure";
+        configureFlags = [ 
+          "--target=${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;
       };
 
-      linien-common = pkgs.python3Packages.buildPythonPackage rec {
-        pname = "linien-common";
-        inherit version;
-        pyproject = 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}"
 
-        src = linien-src;
+          "--with-cpu=cortex-a9"
+          "--with-fpu=vfpv3"
+          "--with-float=hard"
+          "--with-mode=thumb"
+          "--enable-interwork"
+          "--disable-multilib"
 
-        sourceRoot = "${src.name}/linien-common";
-
-        preBuild = ''
-          export HOME=$(mktemp -d)
-        '';
-
-        nativeBuildInputs = [ pkgs.python3Packages.setuptools ];
-
-        pythonRelaxDeps = [ "importlib-metadata" ];
-
-        propagatedBuildInputs = with pkgs.python3Packages; [
-          importlib-metadata
-          numpy
-          rpyc
-          scipy
-          appdirs
+          "--disable-newlib-supplied-syscalls"
+          "--with-gnu-ld"
+          "--with-gnu-as"
+          "--disable-newlib-io-float"
+          "--disable-werror"
         ];
-
-        pythonImportsCheck = [ "linien_common" ];
+        dontFixup = true;
       };
       
-      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" ];
-
+      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-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";
-        src = linien-src;
+        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
+        ];
         nativeBuildInputs = [
           (pkgs.python3.withPackages(ps: [
             migen misoc
@@ -349,33 +223,11 @@
           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";
@@ -400,37 +252,6 @@
       };
 
       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 {
@@ -440,8 +261,9 @@
             sha256 = "sha256-UDz9KK/Hw3qM1BAeKif30rE8Bi6C2uvuZlvyvtJCMfw=";
           };
           nativeBuildInputs = [
-            pkgs.pkgsCross.zynq-baremetal.buildPackages.binutils
-            pkgs.pkgsCross.zynq-baremetal.buildPackages.gcc
+            pkgs.gnumake
+            gnutoolchain.binutils
+            gnutoolchain.gcc
           ];
           postUnpack = ''
             mkdir -p $sourceRoot/lib/sw_apps/zynq_fsbl/misc/fast-servo
@@ -451,11 +273,7 @@
           patches = [] ++ pkgs.lib.optional (board == "fast-servo") ./fast-servo/fsbl.patch;
           postPatch = ''
             patchShebangs lib/sw_apps/zynq_fsbl/misc/copy_bsp.sh
-
-            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 $x \
-                --replace "arm-none-eabi-" "arm-none-eabihf-"
-            done
+            echo 'SEARCH_DIR("${gnutoolchain.newlib}/arm-none-eabi/lib");' >> lib/sw_apps/zynq_fsbl/src/lscript.ld
           '';
           buildPhase = ''
             cd lib/sw_apps/zynq_fsbl/src
@@ -469,8 +287,9 @@
           dontFixup = true;
         };
 
-        u-boot = (pkgs-armv7l.buildUBoot {
-            name = "${board}-u-boot";
+        u-boot = let
+          fast-servo-dts = fast-servo/fast-servo.dts;
+          in (pkgs.pkgsCross.armv7l-hf-multiplatform.buildUBoot {
             defconfig = "xilinx_zynq_virt_defconfig";
             patches = [] ++ pkgs.lib.optional (board == "fast-servo") ./fast-servo/u-boot.patch;
             preConfigure = ''
@@ -480,7 +299,7 @@
               CONFIG_SYS_PROMPT="${board}-boot> "
               CONFIG_AUTOBOOT=y
               CONFIG_BOOTCOMMAND="${builtins.replaceStrings [ "\n" ] [ "; " ] ''
-                setenv bootargs 'root=/dev/mmcblk0p2 console=ttyPS0,115200n8 systemConfig=${builtins.unsafeDiscardStringContext not-os-build.toplevel}'
+                setenv bootargs 'root=/dev/mmcblk0p2 console=ttyPS0,115200n8 systemConfig=${builtins.unsafeDiscardStringContext not-os-cfg.build.toplevel}'
                 fatload mmc 0 0x6400000 uImage
                 fatload mmc 0 0x8000000 ${board}.dtb
                 fatload mmc 0 0xA400000 uRamdisk.image.gz
@@ -493,7 +312,7 @@
             filesToInstall = [ "u-boot.elf" ];
           }).overrideAttrs (oldAttrs: {
             postUnpack = ''
-              cp ${fast-servo/fast-servo.dts} $sourceRoot/arch/arm/dts/zynq-fast-servo.dts
+              cp ${fast-servo-dts} $sourceRoot/arch/arm/dts/zynq-fast-servo.dts
             '';
             postInstall = ''
               mkdir -p $out/dts
@@ -524,7 +343,7 @@
             echo file binary-dist $out/boot.bin >> $out/nix-support/hydra-build-products
           '';
 
-        dtb = pkgs.runCommand "${board}-dtb"
+        dtb = pkgs.runCommand "dtb"
           {
             buildInputs = [ pkgs.gcc pkgs.dtc ];
           }
@@ -544,14 +363,14 @@
 
         sd-image = let
           rootfsImage = pkgs.callPackage (pkgs.path + "/nixos/lib/make-ext4-fs.nix") {
-            storePaths = [ not-os-build.toplevel ];
+            storePaths = [ not-os-cfg.build.toplevel ];
             volumeLabel = "ROOT";
           };
           # Current firmware (kernel, bootimage, etc..) takes ~18MB
           firmwareSize = 30;
           firmwarePartitionOffset = 8;
           in pkgs.stdenv.mkDerivation {
-            name = "${board}-sd-image";
+            name = "sd-image";
             nativeBuildInputs = with pkgs; [ dosfstools mtools libfaketime util-linux parted ];
             buildCommand = ''
               mkdir -p $out/nix-support $out/sd-image
@@ -585,8 +404,8 @@
               mkdir firmware
               cp ${bootimage}/boot.bin firmware/
               cp ${dtb}/${board}.dtb firmware/
-              cp ${not-os-build.kernel}/uImage firmware/
-              cp ${not-os-build.uRamdisk}/initrd firmware/uRamdisk.image.gz
+              cp ${not-os-cfg.build.kernel}/uImage firmware/
+              cp ${not-os-cfg.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=$SECTORS
@@ -599,9 +418,7 @@
             export PATH=${pkgs.qemu}/bin:$PATH
             IMGDIR=$(mktemp -d /tmp/not-os-qemu-XXXXXX)
             BASE=$(realpath $(dirname $0))
-
-            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
+            qemu-img create -F raw -f qcow2 -b $BASE/sd-image.img $IMGDIR/sd-overlay.qcow2 512M
 
             # 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
@@ -616,7 +433,7 @@
 
             rm -rf $IMGDIR
           '';
-          in pkgs.runCommand "${board}-qemu" {
+          in pkgs.runCommand "not-os-qemu" {
             inherit qemuScript;
             passAsFile = [ "qemuScript" ];
             preferLocalBuild = true;
@@ -639,22 +456,16 @@
         "${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;
       };
       packages.armv7l-linux = {
-        inherit fast-servo-gateware linien-server;
+        inherit fast-servo-gateware;
       } //
       (board-package-set { board = "zc706"; }) //
       (board-package-set { board = "fast-servo"; });
+
       hydraJobs = packages.x86_64-linux // packages.armv7l-linux;
     };
 

not-os-patches/iproute2.patch

@@ -1,13 +0,0 @@
-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..2d08009 100644
+index 010c487..e1e85ba 100644
 --- a/configuration.nix
 +++ b/configuration.nix
 @@ -1,4 +1,4 @@
@@ -8,7 +8,7 @@ index 010c487..2d08009 100644
  
  {
    imports = [ ./qemu.nix ];
-@@ -7,10 +7,16 @@
+@@ -7,10 +7,15 @@
    environment.etc = {
      "ssh/authorized_keys.d/root" = {
        text = ''
@@ -18,7 +18,6 @@ index 010c487..2d08009 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";
      };
@@ -28,15 +27,11 @@ index 010c487..2d08009 100644
    };
  }
 diff --git a/runit.nix b/runit.nix
-index d7b0bf3..14dd437 100644
+index d7b0bf3..67cff43 100644
 --- a/runit.nix
 +++ b/runit.nix
-@@ -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
+@@ -7,8 +7,8 @@ let
+     Port 22
      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..9aa338e 100644
+index 7eaee32..3a2a0a9 100644
 --- a/base.nix
 +++ b/base.nix
 @@ -27,6 +27,11 @@ with lib;
@@ -14,12 +14,9 @@ index 7eaee32..9aa338e 100644
      not-os.simpleStaticIp = mkOption {
        type = types.bool;
        default = false;
-@@ -84,17 +89,25 @@ with lib;
-     };
-     environment.etc = {
+@@ -86,15 +91,25 @@ with lib;
        "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.writeClosure [ pkgs.bash ]}); 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)
          cat > $out << EOF
 -        build-use-sandbox = true
 +        auto-optimise-store = true
@@ -31,6 +28,8 @@ index 7eaee32..9aa338e 100644
 +        extra-sandbox-paths = /bin/sh=${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
        '';
@@ -152,10 +151,10 @@ index c61f9d6..fbdf0fd 100644
    };
  }
 diff --git a/zynq_image.nix b/zynq_image.nix
-index 3fa23ab..069fe89 100644
+index 3fa23ab..e2e3871 100644
 --- a/zynq_image.nix
 +++ b/zynq_image.nix
-@@ -1,66 +1,89 @@
+@@ -1,66 +1,102 @@
 -{ config, pkgs, ... }:
 +{ lib, config, pkgs, ... }:
  
@@ -164,7 +163,22 @@ index 3fa23ab..069fe89 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 {
-+  customKernel = (pkgs.linux_6_6.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 {
      extraConfig = ''
        OVERLAY_FS y
 +      MEDIA_SUPPORT n
@@ -181,15 +195,14 @@ index 3fa23ab..069fe89 100644
 +      OF_OVERLAY y
      '';
 -  };
+-  customKernelPackages = pkgs.linuxPackagesFor customKernel;
 +  }).overrideAttrs (oa: {
 +    postInstall = ''
-+      if [ -e arch/arm/boot/uImage ]; then
-+        cp arch/arm/boot/uImage $out
-+      fi
++      cp arch/arm/boot/uImage $out
 +      ${oa.postInstall}
 +    '';
 +  });
-   customKernelPackages = pkgs.linuxPackagesFor customKernel;
++  customKernelPackages = crosspkgs.linuxPackagesFor customKernel;
  in {
    imports = [ ./arm32-cross-fixes.nix ];
    boot.kernelPackages = customKernelPackages;
@@ -240,17 +253,17 @@ index 3fa23ab..069fe89 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 gnugrep nano vim ];
++    systemPackages = with pkgs; [ inetutils wget nano ];
 +    etc = {
 +      "service/getty/run".source = pkgs.writeShellScript "getty" ''
 +        hostname ${config.networking.hostName}