pyfastservo: add note for dac output override

- Changing depth to 4 has resolved cdc issue

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

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

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

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

fast-servo/linien-gateware/fast_servo_soc.py

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

fast-servo/linien-pyrp3-monitor.patch

@@ -0,0 +1,141 @@
+# 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..044d88e
+--- /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 98bdaee..b0a8af4 100644
+--- a/setup.py
++++ b/setup.py
+@@ -1,5 +1,10 @@
+ import re
+-from distutils.core import Extension, setup
++import os
++
++from distutils.core import setup
++from distutils.command.build import build
++from distutils.command.install import install
++
+ from pathlib import Path
+ 
+ # from https://stackoverflow.com/a/7071358/2750945
+@@ -11,9 +16,50 @@ if mo:
+     verstr = mo.group(1)
+ else:
+     raise RuntimeError("Unable to find version string in %s." % (VERSIONFILE,))
++
++# Patch from https://github.com/linien-org/pyrp3/blob/e6688acf8bd79d2dbe1d192d09c1a1baf1f6c67b/setup.py#L16-L55
++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)
++
++
++def install_libmonitor(prefix=""):
++    cwd = os.getcwd()  # get current directory
++    try:
++        os.chdir(build_dir)
++        os.system("make install INSTALL_DIR={prefix}".format(prefix=prefix))
++    finally:
++        os.chdir(cwd)
++
++
++class lib_build(build):
++    def run(self):
++        compile_libmonitor()
++        build.run(self)
++
++
++class lib_install(install):
++    def run(self):
++        compile_libmonitor()
++        install_libmonitor(self.prefix)
++        # install.run(self)
++
++# Will use nix to install libmonitor
++cmdclass = {
++    "build": lib_build
++}
++
+ this_directory = Path(__file__).parent
+ long_description = (this_directory / "README.rst").read_text()
+ 
++
+ setup(
+     name="pyrp3",
+     version=verstr,
+@@ -32,6 +78,7 @@ setup(
+         "cached_property>=1.5.2",
+         "numpy>=1.11.0",
+     ],
++    cmdclass=cmdclass,
+     classifiers=[
+         "Intended Audience :: Developers",
+         "Intended Audience :: Education",
+@@ -45,5 +92,4 @@ setup(
+         "Topic :: Software Development :: Libraries :: Python Modules",
+     ],
+     keywords=["redpitaya", "FPGA", "zynq"],
+-    ext_modules=[Extension("monitor", ["monitor/monitor.c"])],
+ )

fast-servo/pyfastservo/adc.py

@@ -17,11 +17,9 @@
 # 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
 import spidev
-from common import (
+from pyfastservo.common import (
     ADC_AFE_CTRL_ADDR,
     ADC_BITSLIP_ADDR,
     ADC_CH0_HIGH_ADDR,
@@ -33,6 +31,8 @@ from common import (
     AUX_ADC_ADDR,
     MAP_MASK,
     PAGESIZE,
+    write_to_memory,
+    read_from_memory
 )
 
 # /dev/spidev1.0  <=> spidev<BUS>.<DEVICE>
@@ -44,276 +44,181 @@ AUX_ADC_PORT_A = 2
 AUX_ADC_PORT_B = 3
 
 
-def main_adc_config(test_pattern):
+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 = spidev.SpiDev()
+    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
 
-    try:
-        spi.open(MAIN_ADC_BUS, MAIN_ADC_DEVICE)
-        spi.max_speed_hz = 50000
-        spi.mode = 0b00  # CPOL = 0 CPHA = 0
-        spi.cshigh = True
-        # spi.read0 = False
+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)
 
-        spi_buffer = [0x00, 0x80]  # reset
-        rx_buffer = [0x00, 0x00]
+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}")
 
-        spi.xfer2(spi_buffer)
-
-        # REGISTER A1
-        spi_buffer = [0x01, 0x20]  # set to Two's complement Data Format
-        spi.xfer2(spi_buffer)
-
-        # read values back
-        spi_buffer = [0x81, 0x00]
-        rx_buffer = spi.xfer2(spi_buffer)
-        print(f"Spi readback register 0x01: 0x{rx_buffer[1]:02x}")
-        if rx_buffer[1] != 0x20:
-            print("Different value read than sent in reg 0x02")
-
-        # REGISTER A2
-        spi_buffer = [
-            0x02,
-            0x15,
-        ]  # set to LVDS output, set 4 data lanes and turn on test mode
-        spi.xfer2(spi_buffer)
-
-        # read values back
-        spi_buffer = [0x82, 0x00]
-        rx_buffer = spi.xfer2(spi_buffer)
-        print(f"Spi readback register 0x02: 0x{rx_buffer[1]:02x}")
-        if rx_buffer[1] != 0x15:
-            print("Different value read than sent in reg 0x02")
-
-        # REGISTER A3
-        # test pattern high word
-        spi_buffer = [0x03, high_word]
-        spi.xfer2(spi_buffer)
-
-        # read balues back
-        spi_buffer = [0x83, 0x00]
-        rx_buffer = spi.xfer2(spi_buffer)
-        print(f"Spi readback register 0x03: 0x{rx_buffer[1]:02x}")
-        if rx_buffer[1] != high_word:
-            print("Different value read than sent in reg 0x03")
-
-        # REGISTER A4
-        # test pattern low word
-        spi_buffer = [0x04, low_word]
-        spi.xfer2(spi_buffer)
-
-        # read balues back
-        spi_buffer = [0x84, 0x00]
-        rx_buffer = spi.xfer2(spi_buffer)
-        print(f"Spi readback register 0x04: 0x{rx_buffer[1]:02x}")
-        if rx_buffer[1] != low_word:
-            print("Different value read than sent in reg 0x04")
-    finally:
-        spi.close()
-
-
-def main_adc_test_mode(enable):
-    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 = True
-        # spi.read0 = True
-
-        reg_contents = (
-            0x15 if enable else 0x11
-        )  # set to LVDS output, set 4 data lanes and turn on or off test mode
-        spi_buffer = [0x02, reg_contents]
-        spi.xfer2(spi_buffer)
-
-        # read values back
-        spi_buffer = [0x82, 0x00]
-        rx_buffer = spi.xfer2(spi_buffer)
-        print(f"Spi readback register 0x02: 0x{rx_buffer[1]:02x}")
-        if rx_buffer[1] != reg_contents:
-            print("Different value read than sent in reg 0x02")
-    finally:
-        spi.close()
-
-
-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
-            # print(f"addr: 0x{addr:x}\tstart_addr: 0x{start_addr}\tstop_addr: 0x{stop_addr}")
-            contents = mem[start_addr:stop_addr]
-            read_value = list(contents)[:n_bytes]
-            # print("Read value: ", read_value)
-    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
-            # print(f"addr: 0x{addr:x}\tstart_addr: 0x{start_addr}\tstop_addr: 0x{stop_addr}")
-            mem[start_addr:stop_addr] = value_bytes
-            contents = mem[start_addr:stop_addr]
-            # print("Read value: ", list(contents), " written value: ", list(value_bytes))
-    finally:
-        os.close(f)
-
-
-def word_align():
-
-    value = 0
-    edge_detected = False
-    transition = False
-    tap_delay = 0
+def read_frame():
+    return read_from_memory(ADC_FRAME_ADDR, 1)[0]
 
+def perform_bitslip():
     for i in range(4):
-        current_frame = read_from_memory(ADC_FRAME_ADDR, 1)[0]
-        if current_frame != 0x0C:
-            print(
-                f"Performing bitslip (bitslip iteration: {i}). Reason: current_frame is 0x{current_frame:02x} instead of 0x0C"
-            )
+        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; Currernt frame = 0x{current_frame:02x}")
-            break
+            print(f"No bitslip required; Current frame: 0x{current_frame:02x}")
+            return
 
-    current_frame = read_from_memory(ADC_FRAME_ADDR, 1)[0]
-    prev_frame = current_frame
+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)
 
-    for i in range(32):
+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)
-        if edge_detected == 1:
-            break
-        current_frame = read_from_memory(ADC_FRAME_ADDR, 1)[0]
+        current_frame = read_frame()
 
-        print(f"Tap delay: {tap_delay}")
-        print(f"Current frame: 0x{current_frame:02x}")
+        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:
-            tap_delay += 1
-        elif not transition:
-            tap_delay += 1
-            transition = True
-        elif transition:
-            tap_delay = i // 2
-            edge_detected = True
+        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 not edge_detected:
-        tap_delay = 11  # empirically tested to work best
-        write_to_memory(ADC_DELAY_ADDR, tap_delay)
-        print(f"No edge detected; setting iDelay to: {tap_delay}")
-    if edge_detected:
-        write_to_memory(ADC_DELAY_ADDR, tap_delay + 2)
-        print(f"Edge detected; setting iDelay to (tap_delay + 2): {tap_delay} + 2")
+    # 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)
 
-    adc_ch0 = read_from_memory(ADC_CH0_HIGH_ADDR, 4)
-    print(f"ADC_CH0: 0x{adc_ch0}")
+def read_adc_channel(high_addr, low_addr):
+    return (read_from_memory(high_addr, 1)[0] << 8) | read_from_memory(low_addr, 1)[0]
 
-    adc_ch0 = (read_from_memory(ADC_CH0_HIGH_ADDR, 1)[0] << 8) | read_from_memory(
-        ADC_CH0_LOW_ADDR, 1
-    )[0]
-    adc_ch1 = (read_from_memory(ADC_CH1_HIGH_ADDR, 1)[0] << 8) | read_from_memory(
-        ADC_CH1_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 modify_bit(original_value, position, bit_value):
-    mask = 1 << position
-    return (original_value & ~mask) | (bit_value << position)
+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 adc_aux_config():
-    # MSB to LSB
-    # | RANGE | ADDR [2:0] | DIFF |
-    #       DIFF = 0    =>  configure as single ended (it is negated in gateware)
-    #       RANGE = 0   =>  configure as 0-2.5 Vref
-    to_write = 0b00000
-    write_to_memory(AUX_ADC_ADDR, to_write)
-
-
-def adc_aux_read(port, type, pin):
-    # port:
-    #   1 - port A
-    #   2 - port B
-    # type:
-    #   0 - single-ended
-    #   1 - differential
-    # pin:
-    #   0b000   - VA1/VB1
-    #   0b001   - VA2/VB2
-    #   0b010   - VA3/VB3
-    #   0b011   - VA4/VB4
-
-    assert type in (0, 1)
-    assert port in (1, 2)
-
-    write_buffer = [0, 0]
-    read_buffer = [0, 0]
-
-    aux_config_reg = read_from_memory(AUX_ADC_ADDR, 1)[0]
-    aux_config = (aux_config_reg & 0b10001) | pin << 1
-    write_to_memory(AUX_ADC_ADDR, aux_config)
-
+def configure_ltc2195():
     spi = spidev.SpiDev()
     try:
-        spi.open(1, 3)  # AUX ADC 1?
-        spi.max_speed_hz = 5000
-        spi.mode = 0b00
-        spi.cshigh = True
+        spi.open(MAIN_ADC_BUS, MAIN_ADC_DEVICE)
+        spi.max_speed_hz = 50000
+        spi.mode = 0b00  # CPOL = 0 CPHA = 0
+        spi.cshigh = False
 
-        read_buffer = spi.xfer2(write_buffer)
-        mu_voltage = read_buffer[0] << 8 | read_buffer[1] >> 2
-        print(f"MU_voltage: 0x{mu_voltage:04X}")
-        print(f"Read_buffer[0]: 0x{read_buffer[0]:02X}")
-        print(f"Read_buffer[1]: 0x{read_buffer[1]:02X}")
-        return mu_voltage * 2.5 / 4096
+        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()
 
-
-def main():
-    main_adc_config(0x811F)
-    word_align()
-
-    main_adc_test_mode(False)
-
-    write_to_memory(ADC_AFE_CTRL_ADDR, 0b1100) # {-, -, ch2_X10, ch1_X10}
-    print(read_from_memory(ADC_AFE_CTRL_ADDR, 1)[0])
-
-
 if __name__ == "__main__":
-    main()
+    configure_ltc2195()

fast-servo/pyfastservo/common.py

@@ -17,13 +17,16 @@
 # 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
+# LINIEN_OFFSET = 0x0
+LINIEN_OFFSET = 0x300000
 
 # ----------------------------------------------------------------
 # FRONT PANEL LEDS REGISTER ADDRESSES
@@ -71,4 +74,47 @@ 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
+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

@@ -17,11 +17,10 @@
 # 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
 
 import spidev
-from common import (
+from pyfastservo.common import (
     CH0_HIGH_WORD_ADDR,
     CH0_LOW_WORD_ADDR,
     CH1_HIGH_WORD_ADDR,
@@ -29,117 +28,69 @@ from common import (
     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 main_dac_init():
-    spi = spidev.SpiDev()
+def spi_write(spi, address, value):
+    spi.xfer2([address, value])
 
-    try:
-        spi.open(MAIN_DAC_BUS, MAIN_DAC_DEVICE)
-        spi.max_speed_hz = 5000
-        spi.mode = 0b00  # CPOL = 0 CPHA = 0
-        spi.cshigh = True
+def spi_read(spi, address):
+    rx_buffer = spi.xfer2([0x80 | address, 0x00])
+    return rx_buffer[1]
 
-        spi_buffer = [0x00, 0x10]  # software reset
-        spi.xfer2(spi_buffer)
+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)
 
-        spi_buffer = [0x00, 0x00]  # release software reset
-        spi.xfer2(spi_buffer)
+def check_version(spi):
+    version = spi_read(spi, 0x1F)
+    print(f"DAC version: 0x{version:02X}")
+    return version == DAC_VERSION
 
-        spi_buffer = [
-            0x80,
-            0x00,
-        ]  # for some reason it is needed to read the reset address for reset to actually reset
-        rx_buffer = spi.xfer2(spi_buffer)
+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)
 
-        spi_buffer = [0x9F, 0x00]  # hardware version
-        rx_buffer = spi.xfer2(spi_buffer)
-        if rx_buffer[1] != DAC_VERSION:
-            print(f"Unrecognized device: 0x{rx_buffer[1]:02X}")
+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
 
-        print("=== Contents of spi buffer after DAC VERSION read back: ===")
-        print(f"0x{rx_buffer[0]:02X}{rx_buffer[1]:02X}")
-
-        spi_buffer = [0x82, 00]
-        rx_buffer = spi.xfer2(spi_buffer)
-        print(f"0x{rx_buffer[0]:02X}{rx_buffer[1]:02X}")
-
-        # set to 2's complement and I to be first of pair on data input pads
-        spi_buffer = [0x02, 0xB4]
-        rx_buffer = spi.xfer2(spi_buffer)
-        spi_buffer = [0x82, 00]
-        rx_buffer = spi.xfer2(spi_buffer)
-        print(f"0x{rx_buffer[0]:02X}{rx_buffer[1]:02X}")
-
-        for i in range(10):
-            spi_buffer = [0x94, 0x00]
-            rx_buffer = spi.xfer2(spi_buffer)
-            print(f"0x{rx_buffer[0]:02X}{rx_buffer[1]:02X}")
-
-    finally:
-        spi.close()
-
-
-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
-            # print(f"addr: 0x{addr:x}\tstart_addr: 0x{start_addr}\tstop_addr: 0x{stop_addr}")
-            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)
+    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]
-    print(f"REG contents: 0b{reg_contents:03b}")
     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(channel, power_down=True):
+def power_down_afe(channel, power_down=True):
     assert channel in (0, 1)
 
     bitmask = 1 << (channel + 1) & 0b111
@@ -150,33 +101,68 @@ def power_down(channel, power_down=True):
     to_write = reg_contents | value
     write_to_memory(CTRL_ADDR, to_write)
     reg_contents = read_from_memory(CTRL_ADDR, 1)[0]
-    print(f"REG contents: 0b{reg_contents:03b}")
+    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
 
-def write_sample(channel, sample):
-    assert channel in (0, 1)
-    if channel == 0:
-        addresses = [CH0_HIGH_WORD_ADDR, CH0_LOW_WORD_ADDR]
+    # 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:
-        addresses = [CH1_HIGH_WORD_ADDR, CH1_LOW_WORD_ADDR]
+        print("Clock relationship is found")
+        return True
 
-    low_word_value = sample & 0xFF
-    high_word_value = (sample >> 8) & 0x3F
-    values = [high_word_value, low_word_value]
-    for addr, value in zip(addresses, values):
-        write_to_memory(addr, value)
+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
 
-def write_ramp():
-    signal = [i for i in range(16384)]
+        power_down_afe(0, True)
+        power_down_afe(1, True)
 
-    for value in signal:
-        write_sample(0, value)
+        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()
 
-def main():
-    main_dac_init()
-    power_down(0, False)
-    power_down(1, False)
-    
 if __name__ == "__main__":
-    main()
+    configure_ad9117()

fast-servo/pyfastservo/fp_leds.py

@@ -21,7 +21,7 @@ import mmap
 import os
 import time
 
-from common import (
+from pyfastservo.common import (
     LED0_BASE_ADDR,
     LED1_BASE_ADDR,
     LED2_BASE_ADDR,

fast-servo/pyfastservo/initialize.py

@@ -17,14 +17,12 @@
 # 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 adc
-import si5340
-import dac
+from pyfastservo import adc, si5340, dac
 
 def main():
     si5340.configure_si5340()
-    adc.main()
-    dac.main()
+    adc.configure_ltc2195()
+    dac.configure_ad9117()
 
 if __name__ == "__main__":
     main()

fast-servo/pyfastservo/si5340.py

@@ -17,102 +17,264 @@
 # 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
 
-PAGE_ADDR = 0x1
+DEVICE_READY = 0x00FE
+PLL_M_DEN = 0x023B
+STATUS = 0x000C
+STATUS_STICKY = 0x0011
 
-OUT0_MUX_SEL_ADDR = 0x15
-OUT1_MUX_SEL_ADDR = 0x1A
-OUT2_MUX_SEL_ADDR = 0x29
-OUT3_MUX_SEL_ADDR = 0x2E
-
-OUT2_AMPL_ADDR = 0x28
-
-OUT3_PDN_ADDR = 0x2B
-OUT3_FORMAT_ADDR = 0x2C
-OUT3_AMPL_ADDR = 0x2D
+STATUS_LOSREF = 0x04
+STATUS_LOL = 0x08
 
 
-N1_DIVIDER_UPDATE_ADDR = 0x17
+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}")
 
-data_to_write = 0
-clk_out_addr = [
-    OUT0_MUX_SEL_ADDR,
-    OUT1_MUX_SEL_ADDR,
-    OUT2_MUX_SEL_ADDR,
-    OUT3_MUX_SEL_ADDR,
-]
+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
 
-        bus.write_byte_data(IC_ADDR, PAGE_ADDR, 0x0)  # setting page to page 0
+        # 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)
 
-        # read device id
-        low_word = bus.read_byte_data(IC_ADDR, 0x2)
-        high_word = bus.read_byte_data(IC_ADDR, 0x3)
+            # 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),
 
-        print(f"DEV ID: 0x{high_word:2x}{low_word:2x}")
+            # 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
 
-        data_to_write = 0x1
-        bus.write_byte_data(
-            IC_ADDR, PAGE_ADDR, data_to_write
-        )  # change to page 1 for output settings
+            # 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
 
-        readback = bus.read_byte_data(IC_ADDR, PAGE_ADDR)
-        if data_to_write != readback:
-            raise ValueError(f"Failed to set page.")
+            # 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
 
-        for addr in clk_out_addr:
-            bus.write_byte_data(IC_ADDR, addr, 1)  # set source to N1
+            # 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
 
-        bus.write_byte_data(IC_ADDR, OUT2_AMPL_ADDR, 13)
-        readback = bus.read_byte_data(IC_ADDR, OUT2_AMPL_ADDR)
-        # if data_to_write != readback:
-        #     raise ValueError(f"Problematic read: {readback}.")
+            # Output configuration
+            (0x0112, 0x06),  # OUT0 config
+            (0x0113, 0x09),  # OUT0 format
+            (0x0114, 0x3B),  # OUT0 CM/AMPL
+            (0x0115, 0x28),  # OUT0 MUX_SEL
 
-        bus.write_byte_data(IC_ADDR, OUT2_AMPL_ADDR, 0x6B)  # setting OUT2 to LVDS25
+            (0x0117, 0x06),  # OUT1 config
+            (0x0118, 0x09),  # OUT1 format
+            (0x0119, 0x3B),  # OUT1 CM/AMPL
+            (0x011A, 0x28),  # OUT1 MUX_SEL
 
-        bus.write_byte_data(IC_ADDR, OUT3_FORMAT_ADDR, 0xCC)  # SETTING out3 to LVCMOS 18
-        # bus.write_byte_data(IC_ADDR, 0x2E, 0x09)		# SETTING out3 to LVCMOS 33
+            (0x0126, 0x06),  # OUT2 config
+            (0x0127, 0x09),  # OUT2 format
+            (0x0128, 0x3B),  # OUT2 CM/AMPL
+            (0x0129, 0x28),  # OUT2 MUX_SEL
 
-        readback = bus.read_byte_data(IC_ADDR, OUT3_PDN_ADDR)
-        print(f"Si5340 OUTx_PDN CLK3: 0x{readback}")
+            (0x012B, 0x06),  # OUT3 config
+            (0x012C, 0xCC),  # OUT3 format
+            (0x012D, 0x00),  # OUT3 CM/AMPL
+            (0x012E, 0x58),  # OUT3 MUX_SEL
 
-        readback = bus.read_byte_data(IC_ADDR, OUT3_FORMAT_ADDR)
-        print(f"Si5340 OUTx_FORMAT CLK3: 0x{readback}")
+            # 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)
+        ]
 
-        readback = bus.read_byte_data(IC_ADDR, OUT3_AMPL_ADDR)
-        print(f"Si5340 OUTx_AMPL CLK3: 0x{readback}")
+        write_preamble(bus)
 
-        readback = bus.read_byte_data(IC_ADDR, OUT3_MUX_SEL_ADDR)
-        print(f"Si5340 OUTx_CM CLK3: 0x{readback}")
+        time.sleep(0.3)
 
-        bus.write_byte_data(
-            IC_ADDR, PAGE_ADDR, 0x3
-        )  # setting page to 3 to change dividers values
+        print("Writing main configuration...")
+        for address, value in main_config:
+            write_register(bus, address, value)
+        print("Main configuration written")
 
-        n1_numerator = [0x0, 0x0, 0x0, 0x60, 0x22, 0x0]
-        n1_numerator_10M = [0x0, 0x0, 0x0, 0xC0, 0x57, 0x1]
-        n1_num_addr = [0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12]
-        n1_denom_addr = [0x13, 0x14, 0x15, 0x16]
-        for addr, value in zip(n1_num_addr, n1_numerator):
-            bus.write_byte_data(IC_ADDR, addr, value)
+        write_postamble(bus)
 
-        bus.write_byte_data(IC_ADDR, N1_DIVIDER_UPDATE_ADDR, 1)
+        if not wait_for_lock(bus):
+            print("Error waiting for input clock or PLL lock")
+        else:
+            print("Input clock present and PLL locked")
 
-        for addr in n1_num_addr:
-            readback = bus.read_byte_data(IC_ADDR, addr)
-            print(f"Numerator buffer: 0x{readback:02x}")
+        bus.write_byte_data(IC_ADDR, STATUS_STICKY, 0)
 
-        for addr in n1_denom_addr:
-            readback = bus.read_byte_data(IC_ADDR, addr)
-            print(f"Denominator buffer: 0x{readback:02x}")
+        # Final status check
+        pll_locked = check_pll_status(bus)
+        xaxb_signal_present = check_los_status(bus)
 
-        bus.write_byte_data(IC_ADDR, PAGE_ADDR, 0x0)  # setting page to page 0
+        if not pll_locked:
+            print("Error: PLL is not locked")
+        elif not xaxb_signal_present:
+            print("Error: XA/XB signal is lost")
+        else:
+            print("Si5340 configuration completed successfully")
 
 if __name__ == "__main__":
     configure_si5340()

flake.lock

@@ -18,16 +18,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1709237383,
-        "narHash": "sha256-cy6ArO4k5qTx+l5o+0mL9f5fa86tYUX3ozE1S+Txlds=",
+        "lastModified": 1723938990,
+        "narHash": "sha256-9tUadhnZQbWIiYVXH8ncfGXGvkNq3Hag4RCBEMUk7MI=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "1536926ef5621b09bba54035ae2bb6d806d72ac8",
+        "rev": "c42fcfbdfeae23e68fc520f9182dde9f38ad1890",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-unstable",
+        "ref": "nixos-24.05",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -64,11 +64,11 @@
     "src-migen": {
       "flake": false,
       "locked": {
-        "lastModified": 1702942348,
-        "narHash": "sha256-gKIfHZxsv+jcgDFRW9mPqmwqbZXuRvXefkZcSFjOGHw=",
+        "lastModified": 1721561053,
+        "narHash": "sha256-z3LRhNmKZrjr6rFD0yxtccSa/SWvFIYmb+G/D5d2Jd8=",
         "owner": "m-labs",
         "repo": "migen",
-        "rev": "50934ad10a87ade47219b796535978b9bdf24023",
+        "rev": "9279e8623f8433bc4f23ac51e5e2331bfe544417",
         "type": "github"
       },
       "original": {
@@ -80,11 +80,11 @@
     "src-misoc": {
       "flake": false,
       "locked": {
-        "lastModified": 1699352904,
-        "narHash": "sha256-SglyTmXOPv8jJOjwAjJrj/WhAkItQfUbvKfUqrynwRg=",
+        "lastModified": 1715647536,
+        "narHash": "sha256-q+USDcaKHABwW56Jzq8u94iGPWlyLXMyVt0j/Gyg+IE=",
         "ref": "refs/heads/master",
-        "rev": "a53859f2167c31ab5225b6c09f30cf05527b94f4",
-        "revCount": 2452,
+        "rev": "fea9de558c730bc394a5936094ae95bb9d6fa726",
+        "revCount": 2455,
         "submodules": true,
         "type": "git",
         "url": "https://github.com/m-labs/misoc.git"

flake.nix

@@ -1,7 +1,7 @@
 {
   description = "Firmware for Sinara Fast-Servo based on Not-OS and Linien";
   
-  inputs.nixpkgs.url = github:NixOS/nixpkgs/nixos-unstable;
+  inputs.nixpkgs.url = github:NixOS/nixpkgs/nixos-24.05;
   inputs.not-os.url = github:cleverca22/not-os;
   inputs.not-os.inputs.nixpkgs.follows = "nixpkgs";
 
@@ -11,7 +11,7 @@
   outputs = { self, nixpkgs, not-os, src-migen, src-misoc }:
     let
       pkgs = import nixpkgs { system = "x86_64-linux"; overlays = [ crosspkgs-overlay ]; };
-      not-os-cfg = not-os-configured.config.system;
+      pkgs-armv7l = pkgs.pkgsCross.zynq-armv7l-linux;
       fsbl-support = ./fast-servo/fsbl-support;
 
       patched-not-os = pkgs.applyPatches {
@@ -100,38 +100,49 @@
         runScript = "vivado";
       };
 
-      pyrp3 = pkgs.python3Packages.buildPythonPackage rec {
+      pyrp3 = pkgs-armv7l.python3Packages.buildPythonPackage rec {
         pname = "pyrp3";
         version = "1.2.0";
         pyproject = true;
         src = pkgs.fetchFromGitHub {
           owner = "linien-org";
-          repo = "${pname}";
+          repo = "pyrp3";
           rev = "v${version}";
           hash = "sha256-43TTlpJ5SMAjQM71bNVvrWQyciRXM3zpuA/Dw41AEgU=";
         };
-        nativeBuildInputs = with pkgs.python3Packages; [ setuptools wheel setuptools-scm ];
-        propagatedBuildInputs = with pkgs.python3Packages; [
+        patches = ./fast-servo/linien-pyrp3-monitor.patch;
+        nativeBuildInputs = with pkgs-armv7l.python3Packages; [
+          setuptools wheel setuptools-scm
+        ] ++ (with pkgs-armv7l; [ gcc gnumake ]);
+        propagatedBuildInputs = with pkgs-armv7l.python3Packages; [
           myhdl
           rpyc4
           cached-property
           numpy
         ];
+        postInstall = ''
+          cp monitor/libmonitor.so $out/lib
+        '';
+        postFixup = ''
+          substituteInPlace $out/${pkgs.python3.sitePackages}/pyrp3/raw_memory.py \
+            --replace "libmonitor.so" "$out/lib/libmonitor.so"
+        '';
       };
 
-      linien-server = pkgs.python3Packages.buildPythonPackage rec {
+      linien-server = pkgs-armv7l.python3Packages.buildPythonPackage rec {
         pname = "linien-server";
         pyproject = true;
         inherit (pkgs.python3Packages.linien-common) src version;
         sourceRoot = "source/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.python3Packages.setuptools ];
-        propagatedBuildInputs = with pkgs.python3Packages; [
+        nativeBuildInputs = [ pkgs-armv7l.python3Packages.setuptools ];
+        propagatedBuildInputs = with pkgs-armv7l.python3Packages; [
           appdirs
           certifi
           click
@@ -143,15 +154,6 @@
         ];
       };
 
-      not-os-configured = (import patched-not-os {
-        inherit nixpkgs;
-        extraModules = [
-          "${patched-not-os}/zynq_image.nix"
-        ];
-        system = "x86_64-linux";
-        inherit crossSystem;
-      });
-
       fast-servo-gateware = pkgs.stdenv.mkDerivation rec {
         name = "fast-servo-gateware";
         inherit (pkgs.python3Packages.linien-common) src;
@@ -184,11 +186,33 @@
           mkdir -p $out $out/nix-support
           cp gateware/build/top.bit $out
           cp linien-server/linien_server/gateware.bin $out
+          cp linien-server/linien_server/csrmap.py $out
           echo file binary-dist $out/top.bit >> $out/nix-support/hydra-build-products
           echo file binary-dist $out/gateware.bin >> $out/nix-support/hydra-build-products
         '';
       };
 
+      pyfastservo = pkgs-armv7l.python3Packages.buildPythonPackage rec {
+        name = "pyfastservo";
+        src = ./fast-servo;
+        preBuild = ''
+          cat > setup.py << EOF
+          from setuptools import setup
+
+          setup(
+            name="pyfastservo",
+            packages=["pyfastservo"],
+            install_requires=["spidev", "smbus2"],
+            entry_points = {"console_scripts": ["fp_leds=pyfastservo.fp_leds:main"]},
+          )
+          EOF
+        '';
+        propagatedBuildInputs = with pkgs-armv7l.python3Packages; [
+          spidev
+          smbus2
+        ];
+      };
+
       mkbootimage = pkgs.stdenv.mkDerivation {
         pname = "mkbootimage";
         version = "2.3dev";
@@ -213,6 +237,37 @@
       };
 
       board-package-set = { board }: let
+        not-os-configured = (import patched-not-os {
+          inherit nixpkgs;
+          extraModules = [
+            "${patched-not-os}/zynq_image.nix"
+          ] ++ pkgs.lib.optionals (board == "fast-servo") [
+            ({ config, pkgs, lib, ... }: {
+              environment.systemPackages = [
+                linien-server
+                (pkgs.python3.withPackages(ps: [ pyfastservo ]))
+              ];
+              boot.postBootCommands = lib.mkAfter ''
+
+                # Program the FPGA
+                set +x
+                echo "Loading bitstream into SRAM..."
+                echo 0 > /sys/class/fpga_manager/fpga0/flags
+                mkdir -p /lib/firmware
+                cp ${fast-servo-gateware}/gateware.bin /lib/firmware/
+                echo gateware.bin > /sys/class/fpga_manager/fpga0/firmware
+
+                # Run device init scripts
+                echo "Initializing clock generator, ADC, and DAC..."
+                python3 -m pyfastservo.initialize
+              '';
+            })];
+          system = "x86_64-linux";
+          inherit crossSystem;
+        });
+
+        not-os-build = not-os-configured.config.system.build;
+
         fsbl = pkgs.stdenv.mkDerivation {
           name = "${board}-fsbl";
           src = pkgs.fetchFromGitHub {
@@ -251,7 +306,8 @@
           dontFixup = true;
         };
 
-        u-boot = (pkgs.pkgsCross.zynq-armv7l-linux.buildUBoot {
+        u-boot = (pkgs-armv7l.buildUBoot {
+            name = "${board}-u-boot";
             defconfig = "xilinx_zynq_virt_defconfig";
             patches = [] ++ pkgs.lib.optional (board == "fast-servo") ./fast-servo/u-boot.patch;
             preConfigure = ''
@@ -261,7 +317,7 @@
               CONFIG_SYS_PROMPT="${board}-boot> "
               CONFIG_AUTOBOOT=y
               CONFIG_BOOTCOMMAND="${builtins.replaceStrings [ "\n" ] [ "; " ] ''
-                setenv bootargs 'root=/dev/mmcblk0p2 console=ttyPS0,115200n8 systemConfig=${builtins.unsafeDiscardStringContext not-os-cfg.build.toplevel}'
+                setenv bootargs 'root=/dev/mmcblk0p2 console=ttyPS0,115200n8 systemConfig=${builtins.unsafeDiscardStringContext not-os-build.toplevel}'
                 fatload mmc 0 0x6400000 uImage
                 fatload mmc 0 0x8000000 ${board}.dtb
                 fatload mmc 0 0xA400000 uRamdisk.image.gz
@@ -305,7 +361,7 @@
             echo file binary-dist $out/boot.bin >> $out/nix-support/hydra-build-products
           '';
 
-        dtb = pkgs.runCommand "dtb"
+        dtb = pkgs.runCommand "${board}-dtb"
           {
             buildInputs = [ pkgs.gcc pkgs.dtc ];
           }
@@ -325,14 +381,14 @@
 
         sd-image = let
           rootfsImage = pkgs.callPackage (pkgs.path + "/nixos/lib/make-ext4-fs.nix") {
-            storePaths = [ not-os-cfg.build.toplevel ];
+            storePaths = [ not-os-build.toplevel ];
             volumeLabel = "ROOT";
           };
           # Current firmware (kernel, bootimage, etc..) takes ~18MB
           firmwareSize = 30;
           firmwarePartitionOffset = 8;
           in pkgs.stdenv.mkDerivation {
-            name = "sd-image";
+            name = "${board}-sd-image";
             nativeBuildInputs = with pkgs; [ dosfstools mtools libfaketime util-linux parted ];
             buildCommand = ''
               mkdir -p $out/nix-support $out/sd-image
@@ -366,8 +422,8 @@
               mkdir firmware
               cp ${bootimage}/boot.bin firmware/
               cp ${dtb}/${board}.dtb firmware/
-              cp ${not-os-cfg.build.kernel}/uImage firmware/
-              cp ${not-os-cfg.build.uRamdisk}/initrd firmware/uRamdisk.image.gz
+              cp ${not-os-build.kernel}/uImage firmware/
+              cp ${not-os-build.uRamdisk}/initrd firmware/uRamdisk.image.gz
 
               (cd firmware; mcopy -psvm -i ../firmware_part.img ./* ::)
               dd conv=notrunc if=firmware_part.img of=$img seek=$START count=$SECTORS
@@ -380,7 +436,9 @@
             export PATH=${pkgs.qemu}/bin:$PATH
             IMGDIR=$(mktemp -d /tmp/not-os-qemu-XXXXXX)
             BASE=$(realpath $(dirname $0))
-            qemu-img create -F raw -f qcow2 -b $BASE/sd-image.img $IMGDIR/sd-overlay.qcow2 512M
+
+            qemu-img convert -O qcow2 -f raw -o preallocation=metadata $BASE/sd-image.img $IMGDIR/sd-sparse.qcow2
+            qemu-img create -F qcow2 -f qcow2 -b $IMGDIR/sd-sparse.qcow2 $IMGDIR/sd-overlay.qcow2 2G
 
             # Some command arguments are based from samples in Xilinx QEMU User Documentation
             # See: https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/821854273/Running+Bare+Metal+Applications+on+QEMU
@@ -395,7 +453,7 @@
 
             rm -rf $IMGDIR
           '';
-          in pkgs.runCommand "not-os-qemu" {
+          in pkgs.runCommand "${board}-qemu" {
             inherit qemuScript;
             passAsFile = [ "qemuScript" ];
             preferLocalBuild = true;

not-os-patches/network.patch

@@ -1,5 +1,5 @@
 diff --git a/configuration.nix b/configuration.nix
-index 010c487..e1e85ba 100644
+index 010c487..2d08009 100644
 --- a/configuration.nix
 +++ b/configuration.nix
 @@ -1,4 +1,4 @@
@@ -8,7 +8,7 @@ index 010c487..e1e85ba 100644
  
  {
    imports = [ ./qemu.nix ];
-@@ -7,10 +7,15 @@
+@@ -7,10 +7,16 @@
    environment.etc = {
      "ssh/authorized_keys.d/root" = {
        text = ''
@@ -18,6 +18,7 @@ index 010c487..e1e85ba 100644
 +        ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBNdIiLvP2hmDUFyyE0oLOIXrjrMdWWpBV9/gPR5m4AiARx4JkufIDZzmptdYQ5FhJORJ4lluPqp7dAmahoSwg4lv9Di0iNQpHMJvNGZLHYKM1H1FWCCFIEDJ8bD4SVfrDg== root
 +        ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBF/YybP+fQ0J+bNqM5Vgx5vDmVqVWsgUdF1moUxghv7d73GZAFaM6IFBdrXTAa33AwnWwDPMrTgP1V6SXBkb3ciJo/lD1urJGbydbSI5Ksq9d59wvOeANvyWYrQw6+eqTQ== sb
 +        ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBFkmOCQ3BQh3qUjLtfdqyeBsx8rkk/QYlzB0TMrnfn6waLN6yKfPC3WVFv4zN5kNKb/OayvqDa+zfkKe85e/oIPQQKflF7GrCHdssz33DCnW90cz532E6iqG1pjeZjID2A== flo
++        ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICAranL376soiSJ0kxdYNrwElcaZPW1heLFjs8Y7n0jT linuswck
        '';
        mode = "0444";
      };

not-os-patches/pr-28.patch

@@ -1,5 +1,5 @@
 diff --git a/base.nix b/base.nix
-index 7eaee32..3a2a0a9 100644
+index 7eaee32..9aa338e 100644
 --- a/base.nix
 +++ b/base.nix
 @@ -27,6 +27,11 @@ with lib;
@@ -14,9 +14,12 @@ index 7eaee32..3a2a0a9 100644
      not-os.simpleStaticIp = mkOption {
        type = types.bool;
        default = false;
-@@ -86,15 +91,25 @@ with lib;
+@@ -84,17 +89,25 @@ with lib;
+     };
+     environment.etc = {
        "nix/nix.conf".source = pkgs.runCommand "nix.conf" {} ''
-         extraPaths=$(for i in $(cat ${pkgs.writeReferencesToFile pkgs.runtimeShell}); do if test -d $i; then echo $i; fi; done)
+-        extraPaths=$(for i in $(cat ${pkgs.writeReferencesToFile pkgs.runtimeShell}); do if test -d $i; then echo $i; fi; done)
++        extraPaths=$(for i in $(cat ${pkgs.writeClosure [ pkgs.bash ]}); do if test -d $i; then echo $i; fi; done)
          cat > $out << EOF
 -        build-use-sandbox = true
 +        auto-optimise-store = true
@@ -28,8 +31,6 @@ index 7eaee32..3a2a0a9 100644
 +        extra-sandbox-paths = /bin/sh=${pkgs.runtimeShell} $(echo $extraPaths)
 +        max-jobs = auto
 +        sandbox = true
-+        substituters = https://cache.armv7l.xyz
-+        trusted-public-keys = cache.armv7l.xyz-1:kBY/eGnBAYiqYfg0fy0inWhshUo+pGFM3Pj7kIkmlBk=
 +        trusted-users = root
          EOF
        '';
@@ -151,7 +152,7 @@ index c61f9d6..fbdf0fd 100644
    };
  }
 diff --git a/zynq_image.nix b/zynq_image.nix
-index 3fa23ab..9d1621e 100644
+index 3fa23ab..069fe89 100644
 --- a/zynq_image.nix
 +++ b/zynq_image.nix
 @@ -1,66 +1,89 @@
@@ -163,7 +164,7 @@ index 3fa23ab..9d1621e 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.override {
++  customKernel = (pkgs.linux_6_6.override {
      extraConfig = ''
        OVERLAY_FS y
 +      MEDIA_SUPPORT n
@@ -249,7 +250,7 @@ index 3fa23ab..9d1621e 100644
 -  environment.etc."service/getty/run".source = pkgs.writeShellScript "getty" ''
 -    agetty ttyPS0 115200
 +  environment = {
-+    systemPackages = with pkgs; [ inetutils wget nano ];
++    systemPackages = with pkgs; [ inetutils wget gnugrep nano vim ];
 +    etc = {
 +      "service/getty/run".source = pkgs.writeShellScript "getty" ''
 +        hostname ${config.networking.hostName}

not-os-patches/pr-33.patch

@@ -394,10 +394,10 @@ index 0000000..53c5349
 \ No newline at end of file
 diff --git a/xilinx-fpga-manager.patch b/xilinx-fpga-manager.patch
 new file mode 100644
-index 0000000..59aa585
+index 0000000..33daffe
 --- /dev/null
 +++ b/xilinx-fpga-manager.patch
-@@ -0,0 +1,663 @@
+@@ -0,0 +1,676 @@
 +# Enable user-space interface for PL programming via Linux FPGA manager
 +# diff cherry-picked from Xilinx/linux-xilinx/tree/xlnx_rebase_v6.6_LTS
 +# commit IDs: e61c0a9, 0a38712, dc67651, 89a24e3, 8d224b1, 2a9c05f, 4e94580
@@ -425,7 +425,7 @@ index 0000000..59aa585
 + 	tristate "Altera SOCFPGA FPGA Manager"
 + 	depends on ARCH_INTEL_SOCFPGA || COMPILE_TEST
 +diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c
-+index 06651389c592..6e8c45974f28 100644
++index 0f4035b089a2..3aa9f5f041f6 100644
 +--- a/drivers/fpga/fpga-mgr.c
 ++++ b/drivers/fpga/fpga-mgr.c
 +@@ -8,6 +8,9 @@
@@ -673,7 +673,7 @@ index 0000000..59aa585
 + 	NULL,
 + };
 + ATTRIBUTE_GROUPS(fpga_mgr);
-+@@ -732,6 +864,106 @@ void fpga_mgr_put(struct fpga_manager *mgr)
++@@ -739,6 +871,106 @@ void fpga_mgr_put(struct fpga_manager *mgr)
 + }
 + EXPORT_SYMBOL_GPL(fpga_mgr_put);
 + 
@@ -780,8 +780,8 @@ index 0000000..59aa585
 + /**
 +  * fpga_mgr_lock - Lock FPGA manager for exclusive use
 +  * @mgr:	fpga manager
-+@@ -779,6 +1011,9 @@ struct fpga_manager *
-+ fpga_mgr_register_full(struct device *parent, const struct fpga_manager_info *info)
++@@ -788,6 +1020,9 @@ __fpga_mgr_register_full(struct device *parent, const struct fpga_manager_info *
++ 			 struct module *owner)
 + {
 + 	const struct fpga_manager_ops *mops = info->mops;
 ++#ifdef CONFIG_FPGA_MGR_DEBUG_FS
@@ -790,7 +790,7 @@ index 0000000..59aa585
 + 	struct fpga_manager *mgr;
 + 	int id, ret;
 + 
-+@@ -815,10 +1050,28 @@ fpga_mgr_register_full(struct device *parent, const struct fpga_manager_info *in
++@@ -826,10 +1061,28 @@ __fpga_mgr_register_full(struct device *parent, const struct fpga_manager_info *
 + 	mgr->dev.of_node = parent->of_node;
 + 	mgr->dev.id = id;
 + 
@@ -819,7 +819,7 @@ index 0000000..59aa585
 + 	/*
 + 	 * Initialize framework state by requesting low level driver read state
 + 	 * from device.  FPGA may be in reset mode or may have been programmed
-+@@ -832,6 +1085,28 @@ fpga_mgr_register_full(struct device *parent, const struct fpga_manager_info *in
++@@ -843,6 +1096,28 @@ __fpga_mgr_register_full(struct device *parent, const struct fpga_manager_info *
 + 		return ERR_PTR(ret);
 + 	}
 + 
@@ -848,7 +848,7 @@ index 0000000..59aa585
 + 	return mgr;
 + 
 + error_device:
-+@@ -882,6 +1157,10 @@ void fpga_mgr_unregister(struct fpga_manager *mgr)
++@@ -894,6 +1169,10 @@ void fpga_mgr_unregister(struct fpga_manager *mgr)
 + {
 + 	dev_info(&mgr->dev, "%s %s\n", __func__, mgr->name);
 + 
@@ -881,10 +881,10 @@ index 0000000..59aa585
 + 				     &firmware_name)) {
 + 		info->firmware_name = devm_kstrdup(dev, firmware_name,
 +diff --git a/drivers/fpga/zynqmp-fpga.c b/drivers/fpga/zynqmp-fpga.c
-+index f3434e2c487b..db923746cac5 100644
++index f3434e2c487b..d2434ed85eff 100644
 +--- a/drivers/fpga/zynqmp-fpga.c
 ++++ b/drivers/fpga/zynqmp-fpga.c
-+@@ -43,25 +43,42 @@ static int zynqmp_fpga_ops_write(struct fpga_manager *mgr,
++@@ -43,25 +43,47 @@ static int zynqmp_fpga_ops_write(struct fpga_manager *mgr,
 + 	struct zynqmp_fpga_priv *priv;
 + 	dma_addr_t dma_addr;
 + 	u32 eemi_flags = 0;
@@ -915,6 +915,11 @@ index 0000000..59aa585
 ++
 + 	wmb(); /* ensure all writes are done before initiate FW call */
 + 
+++	if (priv->flags & FPGA_MGR_DDR_MEM_AUTH_BITSTREAM)
+++		eemi_flags |= XILINX_ZYNQMP_PM_FPGA_AUTHENTICATION_DDR;
+++	else if (priv->flags & FPGA_MGR_SECURE_MEM_AUTH_BITSTREAM)
+++		eemi_flags |= XILINX_ZYNQMP_PM_FPGA_AUTHENTICATION_OCM;
+++
 + 	if (priv->flags & FPGA_MGR_PARTIAL_RECONFIG)
 + 		eemi_flags |= XILINX_ZYNQMP_PM_FPGA_PARTIAL;
 + 
@@ -931,20 +936,22 @@ index 0000000..59aa585
 + 	return ret;
 + }
 +diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
-+index 9dda7d9898ff..edaf77160746 100644
++index e8b12ec8b060..ffd2dfdb6abd 100644
 +--- a/include/linux/firmware/xlnx-zynqmp.h
 ++++ b/include/linux/firmware/xlnx-zynqmp.h
-+@@ -70,6 +70,8 @@
++@@ -83,6 +83,10 @@
 +  */
 + #define XILINX_ZYNQMP_PM_FPGA_FULL	0x0U
 + #define XILINX_ZYNQMP_PM_FPGA_PARTIAL	BIT(0)
+++#define XILINX_ZYNQMP_PM_FPGA_AUTHENTICATION_DDR	BIT(1)
+++#define XILINX_ZYNQMP_PM_FPGA_AUTHENTICATION_OCM	BIT(2)
 ++#define XILINX_ZYNQMP_PM_FPGA_ENCRYPTION_USERKEY	BIT(3)
 ++#define XILINX_ZYNQMP_PM_FPGA_ENCRYPTION_DEVKEY		BIT(4)
 + 
 + /* FPGA Status Reg */
 + #define XILINX_ZYNQMP_PM_FPGA_CONFIG_STAT_OFFSET	7U
 +diff --git a/include/linux/fpga/fpga-mgr.h b/include/linux/fpga/fpga-mgr.h
-+index 54f63459efd6..c96a4405f909 100644
++index 0d4fe068f3d8..f884d268c974 100644
 +--- a/include/linux/fpga/fpga-mgr.h
 ++++ b/include/linux/fpga/fpga-mgr.h
 +@@ -9,8 +9,11 @@
@@ -959,7 +966,7 @@ index 0000000..59aa585
 + struct fpga_manager;
 + struct sg_table;
 + 
-+@@ -66,17 +69,25 @@ enum fpga_mgr_states {
++@@ -66,17 +69,29 @@ enum fpga_mgr_states {
 +  *
 +  * %FPGA_MGR_EXTERNAL_CONFIG: FPGA has been configured prior to Linux booting
 +  *
@@ -973,6 +980,10 @@ index 0000000..59aa585
 ++ *
 ++ * %FPGA_MGR_USERKEY_ENCRYPTED_BITSTREAM: indicates bitstream is encrypted with
 ++ *					  user key
+++ * %FPGA_MGR_DDR_MEM_AUTH_BITSTREAM: do bitstream authentication using DDR
+++ *				     memory if supported
+++ * %FPGA_MGR_SECURE_MEM_AUTH_BITSTREAM: do bitstream authentication using secure
+++ *					memory if supported
 +  */
 + #define FPGA_MGR_PARTIAL_RECONFIG	BIT(0)
 + #define FPGA_MGR_EXTERNAL_CONFIG	BIT(1)
@@ -986,7 +997,7 @@ index 0000000..59aa585
 + 
 + /**
 +  * struct fpga_image_info - information specific to an FPGA image
-+@@ -86,6 +97,7 @@ enum fpga_mgr_states {
++@@ -86,6 +101,7 @@ enum fpga_mgr_states {
 +  * @config_complete_timeout_us: maximum time for FPGA to switch to operating
 +  *	   status in the write_complete op.
 +  * @firmware_name: name of FPGA image firmware file
@@ -994,7 +1005,7 @@ index 0000000..59aa585
 +  * @sgt: scatter/gather table containing FPGA image
 +  * @buf: contiguous buffer containing FPGA image
 +  * @count: size of buf
-+@@ -102,6 +114,7 @@ struct fpga_image_info {
++@@ -102,6 +118,7 @@ struct fpga_image_info {
 + 	u32 disable_timeout_us;
 + 	u32 config_complete_timeout_us;
 + 	char *firmware_name;
@@ -1002,7 +1013,7 @@ index 0000000..59aa585
 + 	struct sg_table *sgt;
 + 	const char *buf;
 + 	size_t count;
-+@@ -160,6 +173,7 @@ struct fpga_manager_info {
++@@ -160,6 +177,7 @@ struct fpga_manager_info {
 +  * @write: write count bytes of configuration data to the FPGA
 +  * @write_sg: write the scatter list of configuration data to the FPGA
 +  * @write_complete: set FPGA to operating state after writing is done
@@ -1010,7 +1021,7 @@ index 0000000..59aa585
 +  * @fpga_remove: optional: Set FPGA into a specific state during driver remove
 +  * @groups: optional attribute groups.
 +  *
-+@@ -182,6 +196,7 @@ struct fpga_manager_ops {
++@@ -182,6 +200,7 @@ struct fpga_manager_ops {
 + 	int (*write_sg)(struct fpga_manager *mgr, struct sg_table *sgt);
 + 	int (*write_complete)(struct fpga_manager *mgr,
 + 			      struct fpga_image_info *info);
@@ -1018,7 +1029,7 @@ index 0000000..59aa585
 + 	void (*fpga_remove)(struct fpga_manager *mgr);
 + 	const struct attribute_group **groups;
 + };
-+@@ -196,21 +211,35 @@ struct fpga_manager_ops {
++@@ -196,23 +215,37 @@ struct fpga_manager_ops {
 + /**
 +  * struct fpga_manager - fpga manager structure
 +  * @name: name of low level fpga manager
@@ -1031,6 +1042,7 @@ index 0000000..59aa585
 +  * @state: state of fpga manager
 +  * @compat_id: FPGA manager id for compatibility check.
 +  * @mops: pointer to struct of fpga manager ops
++  * @mops_owner: module containing the mops
 +  * @priv: low level driver private date
 ++ * @err: low level driver error code
 ++ * @dir: debugfs image directory
@@ -1046,6 +1058,7 @@ index 0000000..59aa585
 + 	enum fpga_mgr_states state;
 + 	struct fpga_compat_id *compat_id;
 + 	const struct fpga_manager_ops *mops;
++ 	struct module *mops_owner;
 + 	void *priv;
 ++	int err;
 ++#ifdef CONFIG_FPGA_MGR_DEBUG_FS
@@ -1054,21 +1067,21 @@ index 0000000..59aa585
 + };
 + 
 + #define to_fpga_manager(d) container_of(d, struct fpga_manager, dev)
-+@@ -244,4 +273,6 @@ struct fpga_manager *
-+ devm_fpga_mgr_register(struct device *parent, const char *name,
-+ 		       const struct fpga_manager_ops *mops, void *priv);
++@@ -258,4 +291,6 @@ __devm_fpga_mgr_register(struct device *parent, const char *name,
++ 			 const struct fpga_manager_ops *mops, void *priv,
++ 			 struct module *owner);
 + 
 ++#define FPGA_IOCTL_LOAD_DMA_BUFF	_IOWR('R', 1, __u32)
 ++
 + #endif /*_LINUX_FPGA_MGR_H */
 diff --git a/zynq_image.nix b/zynq_image.nix
-index 9d1621e..012e50c 100644
+index d5c5eda..7ede584 100644
 --- a/zynq_image.nix
 +++ b/zynq_image.nix
 @@ -3,6 +3,16 @@
  with lib;
  let
-   customKernel = (pkgs.linux.override {
+   customKernel = (pkgs.linux_6_6.override {
 +    kernelPatches = [
 +      ({
 +        name = "xilinx-configfs-overlays";