M-Labs/artiq
2
0
Fork 2
mirror of https://github.com/m-labs/artiq.git synced 2024-12-29 05:03:34 +08:00
Code Issues Projects Releases Wiki Activity

suservo: lots of gateware/ runtime changes

Browse Source 
tested/validated:

* servo enable/disable
* dds interface, timing, io_update, mask_nu
* channel control (en_out, en_iir, profile)
* profile configuration (coefficients, delays, offsets, channel)
* adc timings and waveforms measured
* asf state readback
* adc readback

individual changes below:

suservo: correct rtio readback

suservo: example, device_db [wip]

suservo: change rtio channel layout

suservo: mem ports in rio domain

suservo: sck clocked from rio_phy

suservo: cleanup, straighten out timing

suservo: dds cs polarity

suservo: simplify pipeline

suservo: drop unused eem names

suservo: decouple adc SR from IIR

suservo: expand coredevice layer

suservo: start the correct stage

suservo: actually load ctrl

suservo: refactor/tweak adc timing

suservo: implement cpld and dds init
This commit is contained in:
Robert Jördens 2018-04-25 21:26:07 +00:00 committed by Robert Jordens
parent 01f762a8f5
commit 307cd07b9d
13 changed files with 288 additions and 145 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

132
artiq/coredevice/suservo.py Normal file
View File

@ -0,0 +1,132 @@
from artiq.language.core import kernel, delay, portable, now_mu
from artiq.language.units import us, ms
from artiq.coredevice.rtio import rtio_output, rtio_input_data
from numpy import int32, int64
from artiq.coredevice import spi2 as spi
from artiq.coredevice import urukul, sampler
COEFF_WIDTH = 18
COEFF_DEPTH = 10 + 1
WE = 1 << COEFF_DEPTH + 1
STATE_SEL = 1 << COEFF_DEPTH
CONFIG_SEL = 1 << COEFF_DEPTH - 1
CONFIG_ADDR = CONFIG_SEL | STATE_SEL
class SUServo:
kernel_invariants = {"channel", "core", "pgia", "cpld0", "cpld1",
"dds0", "dds1", "ref_period_mu"}
def __init__(self, dmgr, channel, pgia_device,
cpld0_device, cpld1_device,
dds0_device, dds1_device,
core_device="core"):
self.core = dmgr.get(core_device)
self.pgia = dmgr.get(pgia_device)
self.dds0 = dmgr.get(dds0_device)
self.dds1 = dmgr.get(dds1_device)
self.cpld0 = dmgr.get(cpld0_device)
self.cpld1 = dmgr.get(cpld1_device)
self.channel = channel
self.gains = 0x0000
self.ref_period_mu = self.core.seconds_to_mu(
self.core.coarse_ref_period)
assert self.ref_period_mu == self.core.ref_multiplier
@kernel
def init(self):
self.set_config(0)
delay(2*us) # pipeline flush
self.pgia.set_config_mu(
sampler.SPI_CONFIG | spi.SPI_END,
16, 4, sampler.SPI_CS_PGIA)
self.cpld0.init(blind=True)
cfg0 = self.cpld0.cfg_reg
self.cpld0.cfg_write(cfg0 | (0xf << urukul.CFG_MASK_NU))
self.dds0.init(blind=True)
self.cpld0.cfg_write(cfg0)
self.cpld1.init(blind=True)
cfg1 = self.cpld1.cfg_reg
self.cpld1.cfg_write(cfg1 | (0xf << urukul.CFG_MASK_NU))
self.dds1.init(blind=True)
self.cpld1.cfg_write(cfg1)
@kernel
def write(self, addr, value):
rtio_output(now_mu(), self.channel, addr | WE, value)
delay_mu(self.ref_period_mu)
@kernel
def read(self, addr):
rtio_output(now_mu(), self.channel, addr, 0)
return rtio_input_data(self.channel)
@kernel
def set_config(self, start):
self.write(CONFIG_ADDR, start)
@kernel
def get_status(self):
return self.read(CONFIG_ADDR)
@kernel
def get_adc_mu(self, adc):
return self.read(STATE_SEL | (adc << 1) | (1 << 8))
@kernel
def set_gain_mu(self, channel, gain):
"""Set instrumentation amplifier gain of a channel.
The four gain settings (0, 1, 2, 3) corresponds to gains of
(1, 10, 100, 1000) respectively.
:param channel: Channel index
:param gain: Gain setting
"""
gains = self.gains
gains &= ~(0b11 << (channel*2))
gains |= gain << (channel*2)
self.pgia.write(gains << 16)
self.gains = gains
class Channel:
kernel_invariants = {"channel", "core", "servo", "servo_channel"}
def __init__(self, dmgr, channel, servo_device,
core_device="core"):
self.core = dmgr.get(core_device)
self.servo = dmgr.get(servo_device)
self.channel = channel
self.servo_channel = self.channel + 8 - self.servo.channel # FIXME
@kernel
def set(self, en_out, en_iir=0, profile=0):
rtio_output(now_mu(), self.channel, 0,
en_out | (en_iir << 1) | (profile << 2))
@kernel
def set_profile_mu(self, profile, ftw, adc, offset,
a1, b0, b1, delay, pow=0):
base = (self.servo_channel << 8) | (profile << 3)
data = [ftw >> 16, b1, pow, adc | (delay << 8), offset, a1, ftw, b0]
for i in range(8):
self.servo.write(base + i, data[i])
@kernel
def get_profile_mu(self, profile, data):
base = (self.servo_channel << 8) | (profile << 3)
for i in range(8):
data[i] = self.servo.read(base + i)
delay(2*us)
@kernel
def get_asf_mu(self, profile):
return self.servo.read(STATE_SEL | (self.servo_channel << 5) | profile)

34
artiq/examples/kasli_suservo/device_db.py
View File

@ -1,4 +1,4 @@
core_addr = "lauda.ber.quartiq.de"
core_addr = "10.0.16.119"
device_db = {
"core": {
@ -141,9 +141,11 @@ device_db = {
"class": "SUServo",
"arguments": {
"channel": 24,
"sampler_pgia_device": "spi_sampler0_pgia",
"urukul0_device": "urukul0_cpld",
"urukul1_device": "urukul1_cpld"
"pgia_device": "spi_sampler0_pgia",
"cpld0_device": "urukul0_cpld",
"cpld1_device": "urukul1_cpld",
"dds0_device": "urukul0_dds",
"dds1_device": "urukul1_dds"
}
},
@ -215,10 +217,20 @@ device_db = {
"class": "CPLD",
"arguments": {
"spi_device": "spi_urukul0",
"refclk": 125e6,
"refclk": 100e6,
"clk_sel": 0
}
},
"urukul0_dds": {
"type": "local",
"module": "artiq.coredevice.ad9910",
"class": "AD9910",
"arguments": {
"pll_n": 40,
"chip_select": 3,
"cpld_device": "urukul0_cpld",
}
},
"spi_urukul1": {
"type": "local",
@ -232,10 +244,20 @@ device_db = {
"class": "CPLD",
"arguments": {
"spi_device": "spi_urukul1",
"refclk": 125e6,
"refclk": 100e6,
"clk_sel": 0
}
},
"urukul1_dds": {
"type": "local",
"module": "artiq.coredevice.ad9910",
"class": "AD9910",
"arguments": {
"pll_n": 40,
"chip_select": 3,
"cpld_device": "urukul1_cpld",
}
},
"led0": {
"type": "local",

35
artiq/examples/kasli_suservo/repository/sampler.py
View File

@ -1,35 +0,0 @@
from artiq.experiment import *
class Sampler(EnvExperiment):
def build(self):
self.setattr_device("core")
self.setattr_device("sampler0")
def run(self):
self.data = []
self.sample()
for d in self.data:
print(d)
@kernel
def sample(self):
self.core.break_realtime()
self.sampler0.init()
for g in range(4):
for ch in range(8):
self.sampler0.set_gain_mu(ch, g)
self.ret([self.sampler0.get_gains_mu()])
delay(10*ms)
raw = [0] * 8
self.sampler0.sample_mu(raw)
self.ret(raw)
delay(10*ms)
data = [0.] * 8
self.sampler0.sample(data)
self.ret(data)
delay(10*ms)
@rpc(flags={"async"})
def ret(self, data):
self.data.append(data)

33
artiq/examples/kasli_suservo/repository/suservo.py Normal file
View File

@ -0,0 +1,33 @@
from artiq.experiment import *
class SUServo(EnvExperiment):
def build(self):
self.setattr_device("core")
self.setattr_device("led0")
self.setattr_device("suservo0")
self.setattr_device("suservo0_ch0")
def run(self):
# self.led()
self.init()
@kernel
def init(self):
self.core.break_realtime()
self.core.reset()
self.suservo0.init()
self.suservo0.set_config(1)
print(self.suservo0.get_status())
delay(3*ms)
self.suservo0.set_config(0)
delay(3*ms)
print(self.suservo0.get_status())
@kernel
def led(self):
self.core.break_realtime()
for i in range(10):
self.led0.pulse(.1*s)
delay(.1*s)

38
artiq/gateware/rtio/phy/servo.py
View File

@ -7,18 +7,19 @@ class RTServoCtrl(Module):
"""Per channel RTIO control interface"""
def __init__(self, ctrl):
self.rtlink = rtlink.Interface(
rtlink.OInterface(len(ctrl)))
rtlink.OInterface(len(ctrl.profile) + 2))
# # #
self.sync.rio += [
If(self.rtlink.o.stb,
Cat(ctrl.profile, ctrl.en_out, ctrl.en_iir).eq(
self.rtlink.o.data),
)
]
self.comb += [
ctrl.stb.eq(self.rtlink.o.stb)
ctrl.stb.eq(self.rtlink.o.stb),
self.rtlink.o.busy.eq(0)
]
self.sync.rio_phy += [
If(self.rtlink.o.stb,
Cat(ctrl.en_out, ctrl.en_iir, ctrl.profile).eq(
self.rtlink.o.data)
)
]
@ -26,10 +27,11 @@ class RTServoMem(Module):
"""All-channel all-profile coefficient and state RTIO control
interface."""
def __init__(self, w, servo):
m_coeff = servo.m_coeff.get_port(write_capable=True,
we_granularity=w.coeff)
m_coeff = servo.iir.m_coeff.get_port(write_capable=True,
we_granularity=w.coeff, clock_domain="rio")
assert len(m_coeff.we) == 2
m_state = servo.m_state.get_port(write_capable=True)
m_state = servo.iir.m_state.get_port(write_capable=True,
clock_domain="rio")
self.specials += m_state, m_coeff
# just expose the w.coeff (18) MSBs of state
@ -52,8 +54,8 @@ class RTServoMem(Module):
# # #
config = Signal(1, reset=0)
status = Signal(2)
config = Signal(w.coeff, reset=0)
status = Signal(w.coeff)
self.comb += [
Cat(servo.start).eq(config),
status.eq(Cat(servo.start, servo.done))
@ -87,16 +89,18 @@ class RTServoMem(Module):
m_state.we.eq(self.rtlink.o.stb & we & state_sel & ~config_sel),
]
read = Signal()
read_sel = Signal()
read_state = Signal()
read_high = Signal()
read_config = Signal()
self.sync.rio += [
If(read,
read.eq(0)
),
If(self.rtlink.o.stb,
read.eq(~we),
read_sel.eq(state_sel),
read_state.eq(state_sel),
read_high.eq(high_coeff),
read_config.eq(config_sel),
)
]
self.sync.rio_phy += [
@ -107,8 +111,8 @@ class RTServoMem(Module):
self.comb += [
self.rtlink.i.stb.eq(read),
self.rtlink.i.data.eq(
Mux(state_sel,
Mux(config_sel,
Mux(read_state,
Mux(read_config,
status,
m_state.dat_r[w.state - w.coeff:]),
Mux(read_high,

26
artiq/gateware/suservo/adc_ser.py
View File

@ -55,13 +55,13 @@ class ADC(Module):
assert p.lanes*t_read == p.width*p.channels
assert all(_ > 0 for _ in (p.t_cnvh, p.t_conv, p.t_rtt))
assert p.t_conv > 1
count = Signal(max=max(p.t_cnvh, p.t_conv - 1, t_read, p.t_rtt + 1) - 1,
count = Signal(max=max(p.t_cnvh, p.t_conv, t_read, p.t_rtt),
reset_less=True)
count_load = Signal.like(count)
count_done = Signal()
self.comb += [
count_done.eq(count == 0),
]
update = Signal()
self.comb += count_done.eq(count == 0)
self.sync += [
count.eq(count - 1),
If(count_done,
@ -78,7 +78,7 @@ class ADC(Module):
)
)
fsm.act("CNVH",
count_load.eq(p.t_conv - 2), # account for sck ODDR delay
count_load.eq(p.t_conv - 1),
pads.cnv.eq(1),
If(count_done,
NextState("CONV")
@ -92,7 +92,7 @@ class ADC(Module):
)
fsm.act("READ",
self.reading.eq(1),
count_load.eq(p.t_rtt), # again account for sck ODDR delay
count_load.eq(p.t_rtt - 1),
pads.sck_en.eq(1),
If(count_done,
NextState("RTT")
@ -101,6 +101,7 @@ class ADC(Module):
fsm.act("RTT", # account for sck->clkout round trip time
self.reading.eq(1),
If(count_done,
update.eq(1),
NextState("IDLE")
)
)
@ -111,10 +112,7 @@ class ADC(Module):
sck_en_ret = 1
self.clock_domains.cd_ret = ClockDomain("ret", reset_less=True)
self.comb += [
# falling clkout makes two bits available
self.cd_ret.clk.eq(pads.clkout)
]
self.comb += self.cd_ret.clk.eq(pads.clkout)
k = p.channels//p.lanes
assert t_read == k*p.width
@ -126,7 +124,9 @@ class ADC(Module):
sdo_sr[0].eq(sdo),
)
]
self.comb += [
Cat(reversed([self.data[i*k + j] for j in range(k)])
).eq(sdo_sr)
self.sync += [
If(update,
Cat(reversed([self.data[i*k + j] for j in range(k)])
).eq(sdo_sr)
)
]

11
artiq/gateware/suservo/dds_ser.py
View File

@ -36,13 +36,8 @@ class DDS(spi.SPISimple):
)
]
io_update = pads.io_update
# this assumes that the cycle time (1/125 MHz = 8 ns) is >1 SYNC_CLK
# cycle (1/250 MHz = 4ns)
done = Signal()
self.sync += [
done.eq(self.done)
]
self.comb += [
io_update.eq(self.done & ~done)
]
done_old = Signal()
self.sync += done_old.eq(self.done)
self.comb += pads.io_update.eq(self.done & ~done_old)

24
artiq/gateware/suservo/pads.py
View File

@ -3,17 +3,17 @@ from migen.genlib.io import DifferentialOutput, DifferentialInput, DDROutput
class SamplerPads(Module):
def __init__(self, platform, eem0, eem1):
def __init__(self, platform, eem):
self.sck_en = Signal()
self.cnv = Signal()
self.clkout = Signal()
spip = platform.request("{}_adc_spi_p".format(eem0))
spin = platform.request("{}_adc_spi_n".format(eem0))
cnv = platform.request("{}_cnv".format(eem0))
sdr = platform.request("{}_sdr".format(eem0))
dp = platform.request("{}_adc_data_p".format(eem0))
dn = platform.request("{}_adc_data_n".format(eem0))
spip = platform.request("{}_adc_spi_p".format(eem))
spin = platform.request("{}_adc_spi_n".format(eem))
cnv = platform.request("{}_cnv".format(eem))
sdr = platform.request("{}_sdr".format(eem))
dp = platform.request("{}_adc_data_p".format(eem))
dn = platform.request("{}_adc_data_n".format(eem))
clkout_se = Signal()
sck = Signal()
@ -21,7 +21,7 @@ class SamplerPads(Module):
self.specials += [
DifferentialOutput(self.cnv, cnv.p, cnv.n),
DifferentialOutput(1, sdr.p, sdr.n),
DDROutput(self.sck_en, 0, sck),
DDROutput(0, self.sck_en, sck, ClockSignal("rio_phy")),
DifferentialOutput(sck, spip.clk, spin.clk),
DifferentialInput(dp.clkout, dn.clkout, clkout_se),
Instance("BUFR", i_I=clkout_se, o_O=self.clkout)
@ -52,17 +52,17 @@ class SamplerPads(Module):
class UrukulPads(Module):
def __init__(self, platform, eem00, eem01, eem10, eem11):
def __init__(self, platform, eem0, eem1):
spip, spin = [[
platform.request("{}_qspi_{}".format(eem, pol), 0)
for eem in (eem00, eem10)] for pol in "pn"]
for eem in (eem0, eem1)] for pol in "pn"]
ioup = [platform.request("{}_io_update".format(eem), 0)
for eem in (eem00, eem10)]
for eem in (eem0, eem1)]
self.cs_n = Signal()
self.clk = Signal()
self.io_update = Signal()
self.specials += [(
DifferentialOutput(self.cs_n, spip[i].cs_n, spin[i].cs_n),
DifferentialOutput(~self.cs_n, spip[i].cs, spin[i].cs),
DifferentialOutput(self.clk, spip[i].clk, spin[i].clk),
DifferentialOutput(self.io_update, ioup[i].p, ioup[i].n))
for i in range(2)]

49
artiq/gateware/suservo/servo.py
View File

@ -24,38 +24,37 @@ class Servo(Module):
assert t_iir + (2 << iir_p.channel) < t_cycle, "need shifting time"
self.start = Signal()
t_restart = t_cycle - t_adc
t_restart = t_cycle - t_adc + 1
assert t_restart > 0
cnt = Signal(max=t_restart + 1)
cnt = Signal(max=t_restart)
cnt_done = Signal()
token = Signal(2)
active = Signal(3)
self.done = Signal()
iir_done = Signal()
self.comb += [
cnt_done.eq(cnt == 0),
iir_done.eq(self.iir.shifting | self.iir.done),
self.adc.start.eq(self.start & cnt_done),
self.iir.start.eq(token[0] & self.adc.done),
self.dds.start.eq(token[1] & iir_done),
self.done.eq(self.dds.done),
]
self.sync += [
If(self.adc.done & ~cnt_done,
cnt.eq(cnt - 1),
If(self.dds.done,
active[2].eq(0)
),
If(self.adc.start,
cnt.eq(t_restart),
If(self.dds.start & self.dds.done,
active[2].eq(1),
active[1].eq(0)
),
If(self.adc.done,
token[0].eq(0)
If(self.iir.start & self.iir.done,
active[1].eq(1),
active[0].eq(0)
),
If(self.adc.start,
token[0].eq(1)
If(~cnt_done & self.adc.done,
cnt.eq(cnt - 1)
),
If(iir_done,
token[1].eq(0)
),
If(self.iir.start,
token[1].eq(1)
If(self.adc.start & self.adc.done,
active[0].eq(1),
cnt.eq(t_restart - 1)
)
]
self.comb += [
cnt_done.eq(cnt == 0),
self.adc.start.eq(self.start & cnt_done),
self.iir.start.eq(active[0] & self.adc.done),
self.dds.start.eq(active[1] &
(self.iir.shifting | self.iir.done)),
self.done.eq(self.dds.done),
]

14
artiq/gateware/suservo/spi.py
View File

@ -37,8 +37,6 @@ class SPISimple(Module):
assert p.clk >= 1
cs_n = pads.cs_n
clk = pads.clk
cnt = Signal(max=max(2, p.clk), reset_less=True)
cnt_done = Signal()
cnt_next = Signal()
@ -54,21 +52,17 @@ class SPISimple(Module):
]
for i, d in enumerate(self.data):
self.comb += [
getattr(pads, "mosi{}".format(i)).eq(d[-1])
]
self.comb += getattr(pads, "mosi{}".format(i)).eq(d[-1])
bits = Signal(max=p.width + 1, reset_less=True)
self.submodules.fsm = fsm = CEInserter()(FSM("IDLE"))
self.comb += [
fsm.ce.eq(cnt_done)
]
self.comb += fsm.ce.eq(cnt_done)
fsm.act("IDLE",
self.done.eq(1),
cs_n.eq(1),
pads.cs_n.eq(1),
If(self.start,
cnt_next.eq(1),
NextState("SETUP")
@ -84,7 +78,7 @@ class SPISimple(Module):
)
fsm.act("HOLD",
cnt_next.eq(1),
clk.eq(1),
pads.clk.eq(1),
NextState("SETUP")
)

24
artiq/gateware/targets/kasli.py
View File

@ -224,7 +224,7 @@ def _sampler(eem, eem_aux=None):
Subsignal("sdod", Pins(_eem_pin(eem_aux, 4, "n"))),
IOStandard("LVDS_25"),
),
]
]
return ios
@ -362,7 +362,7 @@ def _urukul_qspi(eem0, eem1):
))
ios += [
("{}_qspi_p".format(eem0), 0,
Subsignal("cs_n", Pins(_eem_pin(eem0, 5, "p"))),
Subsignal("cs", Pins(_eem_pin(eem0, 5, "p"))),
Subsignal("clk", Pins(_eem_pin(eem0, 2, "p"))),
Subsignal("mosi0", Pins(_eem_pin(eem1, 0, "p"))),
Subsignal("mosi1", Pins(_eem_pin(eem1, 1, "p"))),
@ -371,7 +371,7 @@ def _urukul_qspi(eem0, eem1):
IOStandard("LVDS_25"),
),
("{}_qspi_n".format(eem0), 0,
Subsignal("cs_n", Pins(_eem_pin(eem0, 5, "n"))),
Subsignal("cs", Pins(_eem_pin(eem0, 5, "n"))),
Subsignal("clk", Pins(_eem_pin(eem0, 2, "n"))),
Subsignal("mosi0", Pins(_eem_pin(eem1, 0, "n"))),
Subsignal("mosi1", Pins(_eem_pin(eem1, 1, "n"))),
@ -525,25 +525,25 @@ class SUServo(_StandaloneBase):
rtio_channels.append(rtio.Channel.from_phy(phy))
# EEM3, EEM2: Sampler
sampler_pads = servo_pads.SamplerPads(self.platform, "eem3", "eem2")
sampler_pads = servo_pads.SamplerPads(self.platform, "eem3")
# EEM5, EEM4 and EEM7, EEM6: Urukul
urukul_pads = servo_pads.UrukulPads(self.platform,
"eem5", "eem4", "eem7", "eem6")
adc_p = servo.ADCParams(width=16, channels=8, lanes=4,
t_cnvh=4, t_conv=57, t_rtt=4)
iir_p = servo.IIRWidths(state=25, coeff=18, adc=16,
asf=14, word=16, accu=48, shift=11,
channel=3, profile=5)
"eem5", "eem7")
adc_p = servo.ADCParams(width=16, channels=8, lanes=4, t_cnvh=4,
# account for SCK pipeline latency
t_conv=57 - 4, t_rtt=4 + 4)
iir_p = servo.IIRWidths(state=25, coeff=18, adc=16, asf=14, word=16,
accu=48, shift=11, channel=3, profile=5)
dds_p = servo.DDSParams(width=8 + 32 + 16 + 16,
channels=adc_p.channels, clk=1)
su = servo.Servo(sampler_pads, urukul_pads, adc_p, iir_p, dds_p)
su = ClockDomainsRenamer({"sys": "rio_phy"})(su)
su = ClockDomainsRenamer("rio_phy")(su)
self.submodules += sampler_pads, urukul_pads, su
ctrls = [rtservo.RTServoCtrl(ctrl) for ctrl in su.iir.ctrl]
self.submodules += ctrls
rtio_channels.extend(rtio.Channel.from_phy(ctrl) for ctrl in ctrls)
mem = rtservo.RTServoMem(iir_p, su.iir)
mem = rtservo.RTServoMem(iir_p, su)
self.submodules += mem
rtio_channels.append(rtio.Channel.from_phy(mem, ififo_depth=4))

6
artiq/gateware/test/suservo/test_adc.py
View File

@ -37,7 +37,7 @@ class TB(Module):
sr = Signal(p.width*p.channels//p.lanes, reset_less=True)
srs.append(sr)
self.sync.adc += [
sdo.eq(self._dly(sr[-1], -1)),
sdo.eq(self._dly(sr[-1], 0)),
If(adc_sck_en,
sr[1:].eq(sr)
)
@ -52,10 +52,10 @@ class TB(Module):
adc_clk_rec = Signal()
self.comb += [
adc_sck_en.eq(self._dly(self.sck_en, 1)),
adc_sck_en.eq(self._dly(self.sck_en, 0)),
self.sck_en_ret.eq(self._dly(adc_sck_en)),
adc_clk_rec.eq(self._dly(self.sck, 1)),
adc_clk_rec.eq(self._dly(self.sck, 0)),
self.clkout.eq(self._dly(adc_clk_rec)),
]

7
artiq/gateware/test/suservo/test_servo.py
View File

@ -11,10 +11,9 @@ from artiq.gateware.suservo import servo
class ServoSim(servo.Servo):
def __init__(self):
adc_p = servo.ADCParams(width=16, channels=8, lanes=4,
t_cnvh=4, t_conv=57, t_rtt=4)
iir_p = servo.IIRWidths(state=25, coeff=18, adc=16,
asf=14, word=16, accu=48, shift=11,
channel=3, profile=5)
t_cnvh=4, t_conv=57 - 4, t_rtt=4 + 4)
iir_p = servo.IIRWidths(state=25, coeff=18, adc=16, asf=14, word=16,
accu=48, shift=11, channel=3, profile=5)
dds_p = servo.DDSParams(width=8 + 32 + 16 + 16,
channels=adc_p.channels, clk=1)