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devices: basic pdq2 controller/client

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This commit is contained in:
Sebastien Bourdeauducq 2014-10-25 11:38:42 +08:00
parent 16170c9013
commit 3f1391f7f2
2 changed files with 156 additions and 83 deletions
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81
artiq/devices/pdq2/pdq2-client
View File

@ -1,23 +1,27 @@
#!/usr/bin/env python3
# Robert Jordens <jordens@gmail.com>, 2012
# Based on code by Robert Jordens <jordens@gmail.com>, 2012
import argparse
import time
import logging
from scipy import interpolate
import numpy as np
from pdq2com import Pdq2
from artiq.management.pc_rpc import Client
def _main():
parser = argparse.ArgumentParser(description="""PDQ2 frontend.
Evaluates times and voltages, interpolates and uploads
them.""")
parser.add_argument("-s", "--serial", default=None,
help="device (FT245R) serial string [first]")
def _get_args():
parser = argparse.ArgumentParser(description="""PDQ2 client.
Evaluates times and voltages, interpolates and uploads
them to the controller.""")
parser.add_argument("-s", "--server", default="::1",
help="hostname or IP of the master to connect to")
parser.add_argument("--port", default=8889, type=int,
help="TCP port to use to connect to the master")
parser.add_argument("-q", "--quit-controller", default=False,
action="store_true",
help="causes the controller to quit")
parser.add_argument("-c", "--channel", default=0, type=int,
help="channel: 3*board_num+dac_num [%(default)s]")
parser.add_argument("-f", "--frame", default=0, type=int,
@ -44,42 +48,44 @@ def _main():
help="demo mode: pulse and chirp,"
" 1V*ch+0.1V*frame [%(default)s]")
parser.add_argument("-p", "--plot", help="plot to file [%(default)s]")
parser.add_argument("-d", "--debug", default=False,
action="store_true", help="debug communications")
parser.add_argument("-r", "--reset", default=False,
action="store_true", help="do reset before")
parser.add_argument("-b", "--bit", default=False,
action="store_true", help="do bit test")
return parser.parse_args()
args = parser.parse_args()
if args.debug:
logging.basicConfig(level=logging.DEBUG)
else:
logging.basicConfig(level=logging.WARNING)
times = eval(args.times, globals(), {})
voltages = eval(args.voltages, globals(), dict(t=times))
dev = Pdq2(serial=args.serial)
def _main():
args = _get_args()
dev = Client(args.server, args.port)
if args.quit_controller:
dev.quit()
return
dev.init()
if args.reset:
dev.write(b"\x00") # flush any escape
dev.flush_escape()
dev.write_cmd("RESET_EN")
time.sleep(.1)
if args.dcm:
dev.write_cmd("DCM_EN")
dev.freq = 100e6
dev.set_freq(100e6)
elif args.dcm == 0:
dev.write_cmd("DCM_DIS")
dev.freq = 50e6
dev.set_freq(50e6)
dev.write_cmd("START_DIS")
num_channels = dev.get_num_channels()
num_frames = dev.get_num_frames()
times = eval(args.times, globals(), {})
voltages = eval(args.voltages, globals(), dict(t=times))
if args.demo:
channels = [args.channel] if args.channel < dev.num_channels \
else range(dev.num_channels)
frames = [args.frame] if args.frame < dev.num_frames \
else range(dev.num_frames)
# FIXME
channels = [args.channel] if args.channel < num_channels \
else range(num_channels)
frames = [args.frame] if args.frame < num_frames \
else range(num_frames)
for channel in channels:
f = []
for frame in frames:
@ -95,32 +101,29 @@ def _main():
board, dac = divmod(channel, dev.num_dacs)
dev.write_data(dev.add_mem_header(board, dac, dev.map_frames(f)))
elif args.bit:
map = [0] * dev.num_frames
map = [0] * num_frames
t = np.arange(2*16) * 1.
v = [-1, 0, -1]
for i in range(15):
vi = 1 << i
v.extend([vi - 1, vi])
v = np.array(v)*dev.max_out/(1 << 15)
v = np.array(v)*dev.get_max_out()/(1 << 15)
t, v = t[:3], v[:3]
# print(t, v)
for channel in range(dev.num_channels):
dev.write_data(dev.multi_frame([(t, v)], channel=channel,
order=0, map=map, shift=15,
stop=False, trigger=False))
for channel in range(num_channels):
dev.multi_frame([(t, v)], channel=channel, order=0, map=map,
shift=15, stop=False, trigger=False)
else:
tv = [(times, voltages)]
map = [None] * dev.num_frames
map = [None] * num_frames
map[args.frame] = 0
dev.write_data(dev.multi_frame(tv, channel=args.channel,
order=args.order, map=map))
dev.multi_frame(tv, channel=args.channel, order=args.order, map=map)
dev.write_cmd("START_EN")
if not args.disarm:
dev.write_cmd("ARM_EN")
if args.free:
dev.write_cmd("TRIGGER_EN")
dev.close()
if args.plot:
from matplotlib import pyplot as plt
@ -128,7 +131,7 @@ def _main():
ax0.plot(times, voltages, "xk", label="points")
if args.order:
spline = interpolate.splrep(times, voltages, k=args.order)
ttimes = np.arange(0, times[-1], 1/dev.freq)
ttimes = np.arange(0, times[-1], 1/dev.get_freq())
vvoltages = interpolate.splev(ttimes, spline)
ax0.plot(ttimes, vvoltages, ",b", label="interpolation")
fig.savefig(args.plot)

158
artiq/devices/pdq2/pdq2com.py → artiq/devices/pdq2/pdq2-controller Normal file → Executable file
View File

@ -1,12 +1,17 @@
# Robert Jordens <jordens@gmail.com>, 2012
#!/usr/bin/env python3
# Based on code by Robert Jordens <jordens@gmail.com>, 2012
import logging
import struct
import warnings
import argparse
import asyncio
from scipy import interpolate
import numpy as np
from artiq.management.pc_rpc import Server, WaitQuit
logger = logging.getLogger("Pdq2")
@ -74,26 +79,14 @@ if Ftdi is None:
self.fil.close()
del self.fil
warnings.warn("no ftdi library found. writing to files")
logger.warning("no ftdi library found. writing to files")
Ftdi = FileFtdi
class Pdq2:
class Pdq2(WaitQuit):
"""
PDQ DAC (a.k.a. QC_Waveform)
"""
max_val = 1 << 15 # signed 16 bit DAC
max_out = 10.
freq = 50e6 # samples/s
max_time = 1 << 16 # unsigned 16 bit timer
num_dacs = 3
num_frames = 8
num_channels = 9
max_data = 4*(1 << 10) # 8kx16 8kx16 4kx16
escape_char = b"\xa5"
cordic_gain = 1.
for i in range(16):
cordic_gain *= np.sqrt(1 + 2**(-2*i))
commands = {
"RESET_EN": b"\x00",
@ -109,24 +102,51 @@ class Pdq2:
}
def __init__(self, serial=None):
WaitQuit.__init__(self)
self.serial = serial
self.dev = Ftdi(serial)
def init(self):
self.max_val = 1 << 15 # signed 16 bit DAC
self.max_out = 10.
self.freq = 50e6 # samples/s
self.max_time = 1 << 16 # unsigned 16 bit timer
self.num_dacs = 3
self.num_frames = 8
self.num_channels = 9
self.max_data = 4*(1 << 10) # 8kx16 8kx16 4kx16
self.escape_char = b"\xa5"
self.cordic_gain = 1.
for i in range(16):
self.cordic_gain *= np.sqrt(1 + 2**(-2*i))
def close(self):
self.dev.close()
del self.dev
def cmd(self, cmd):
def set_freq(self, f):
self.freq = f
def get_freq(self):
return self.freq
def get_num_channels(self):
return self.num_channels
def get_num_frames(self):
return self.num_frames
def get_max_out(self):
return self.max_out
def _cmd(self, cmd):
return self.escape_char + self.commands[cmd]
def write_cmd(self, cmd):
return self.write(self.cmd(cmd))
def escape(self, data):
def _escape(self, data):
return data.replace(self.escape_char,
self.escape_char + self.escape_char)
def write(self, *segments):
def _write(self, *segments):
"""
writes data segments to device
"""
@ -135,17 +155,23 @@ class Pdq2:
if written != len(segment):
raise IOError("wrote %i of %i" % (written, len(segment)))
def write_data(self, *segments):
return self.write(*(self.escape(seg) for seg in segments))
def flush_escape(self):
self._write(b"\x00")
def line_times(self, t, shift=0):
def write_cmd(self, cmd):
return self._write(self._cmd(cmd))
def _write_data(self, *segments):
return self._write(*(self._escape(seg) for seg in segments))
def _line_times(self, t, shift=0):
scale = self.freq/2**shift
t = t*scale
tr = np.rint(t)
dt = np.diff(tr)
return t, tr, dt
def interpolate(self, t, v, order, shift=0, tr=None):
def _interpolate(self, t, v, order, shift=0, tr=None):
"""
calculate spline interpolation derivatives for data
according to interpolation order
@ -171,7 +197,7 @@ class Pdq2:
dv[i] -= c*dv[j]
return dv
def pack_frame(self, *parts_dtypes):
def _pack_frame(self, *parts_dtypes):
frame = []
for part, dtype in parts_dtypes:
if dtype == "i6":
@ -185,9 +211,9 @@ class Pdq2:
frame, frame.dtype, frame.shape, len(bytes(frame.data)))
return bytes(frame.data)
def frame(self, t, v, p=None, f=None,
order=3, aux=None, shift=0, trigger=True, end=True,
silence=False, stop=True, clear=True, wait=False):
def _frame(self, t, v, p=None, f=None,
order=3, aux=None, shift=0, trigger=True, end=True,
silence=False, stop=True, clear=True, wait=False):
"""
serialize frame data
voltages in volts, times in seconds
@ -217,7 +243,7 @@ class Pdq2:
head[-1] |= (not stop and wait) << 15 # 1
parts.append((head, "u2"))
t, tr, dt = self.line_times(t, shift)
t, tr, dt = self._line_times(t, shift)
assert np.all(dt*2**shift > 1 + length), (dt, length)
assert np.all(dt < self.max_time), dt
@ -226,20 +252,20 @@ class Pdq2:
v = np.clip(v/self.max_out, -1, 1)
if p is not None:
v /= self.cordic_gain
for dv, w in zip(self.interpolate(t, v, order, shift, tr), words):
for dv, w in zip(self._interpolate(t, v, order, shift, tr), words):
parts.append((np.rint(dv*(2**(16*w - 1))), "i%i" % (2*w)))
if p is not None:
p = p/(2*np.pi)
for dv, w in zip(self.interpolate(t, p, 0, shift, tr), [1]):
for dv, w in zip(self._interpolate(t, p, 0, shift, tr), [1]):
parts.append((np.rint(dv*(2**(16*w))), "u%i" % (2*w)))
if f is not None:
f = f/self.freq
for dv, w in zip(self.interpolate(t, f, 1, shift, tr), [2, 2]):
for dv, w in zip(self._interpolate(t, f, 1, shift, tr), [2, 2]):
parts.append((np.rint(dv*(2**(16*w))), "i%i" % (2*w)))
frame = self.pack_frame(*parts)
frame = self._pack_frame(*parts)
if stop:
if p is not None:
@ -255,9 +281,9 @@ class Pdq2:
1, int(v[-1]*2**15))
return frame
def line(self, dt, v=(), a=(), p=(), f=(), typ=0,
silence=False, end=False, trigger=False, aux=False,
clear=False):
def _line(self, dt, v=(), a=(), p=(), f=(), typ=0,
silence=False, end=False, trigger=False, aux=False,
clear=False):
raise NotImplementedError
fmt = "<HH"
parts = [0, int(round(dt*self.freq))]
@ -272,7 +298,7 @@ class Pdq2:
if p is not None:
typ = 1
def map_frames(self, frames, map=None):
def _map_frames(self, frames, map=None):
table = []
adr = self.num_frames
for frame in frames:
@ -291,15 +317,59 @@ class Pdq2:
t = struct.pack("<" + "H"*self.num_frames, *t)
return t + b"".join(frames)
def add_mem_header(self, board, dac, data, adr=0):
def _add_mem_header(self, board, dac, data, adr=0):
assert dac in range(self.num_dacs)
head = struct.pack("<HHH", (board << 4) | dac,
adr, adr + len(data)//2 - 1)
return head + data
def multi_frame(self, times_voltages, channel, map=None, **kwargs):
frames = [self.frame(t, v, **kwargs) for t, v in times_voltages]
data = self.map_frames(frames, map)
frames = [self._frame(t, v, **kwargs) for t, v in times_voltages]
data = self._map_frames(frames, map)
board, dac = divmod(channel, self.num_dacs)
data = self.add_mem_header(board, dac, data)
return data
data = self._add_mem_header(board, dac, data)
self._write_data(data)
def _get_args():
parser = argparse.ArgumentParser(description="PDQ2 controller")
parser.add_argument(
"--bind", default="::1",
help="hostname or IP address to bind to")
parser.add_argument(
"--port", default=8889, type=int,
help="TCP port to listen to")
parser.add_argument(
"-s", "--serial", default=None,
help="device (FT245R) serial string [first]")
parser.add_argument(
"-d", "--debug", default=False, action="store_true",
help="debug communications")
return parser.parse_args()
def main():
args = _get_args()
if args.debug:
logging.basicConfig(level=logging.DEBUG)
else:
logging.basicConfig(level=logging.WARNING)
dev = Pdq2(serial=args.serial)
try:
loop = asyncio.get_event_loop()
try:
server = Server(dev)
loop.run_until_complete(server.start(args.bind, args.port))
try:
loop.run_until_complete(dev.wait_quit())
finally:
loop.run_until_complete(server.stop())
finally:
loop.close()
finally:
dev.close()
if __name__ == "__main__":
main()