artiq/frontend/pdq2

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#!/usr/bin/env python3
# Robert Jordens <jordens@gmail.com>, 2012
import argparse
import time
import logging
from scipy import interpolate
import numpy as np
from artiq.devices.pdq2com import Pdq2
def _main():
parser = argparse.ArgumentParser(description="""PDQ2 frontend.
Evaluates times and voltages, interpolates and uploads
them.""")
parser.add_argument("-s", "--serial", default=None,
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help="device (FT245R) serial string [first]")
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parser.add_argument("-c", "--channel", default=0, type=int,
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help="channel: 3*board_num+dac_num [%(default)s]")
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parser.add_argument("-f", "--frame", default=0, type=int,
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help="frame [%(default)s]")
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parser.add_argument("-e", "--free", default=False,
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action="store_true",
help="software trigger [%(default)s]")
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parser.add_argument("-n", "--disarm", default=False,
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action="store_true",
help="disarm group [%(default)s]")
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parser.add_argument("-t", "--times",
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default="np.arange(5)*1e-6",
help="sample times (s) [%(default)s]")
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parser.add_argument("-v", "--voltages",
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default="(1-np.cos(t/t[-1]*2*np.pi))/2",
help="sample voltages (V) [%(default)s]")
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parser.add_argument("-o", "--order", default=3, type=int,
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help="interpolation"
" (0: const, 1: lin, 2: quad, 3: cubic)"
" [%(default)s]")
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parser.add_argument("-m", "--dcm", default=None, type=int,
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help="choose fast 100MHz clock [%(default)s]")
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parser.add_argument("-x", "--demo", default=False, action="store_true",
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help="demo mode: pulse and chirp,"
" 1V*ch+0.1V*frame [%(default)s]")
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parser.add_argument("-p", "--plot", help="plot to file [%(default)s]")
parser.add_argument("-d", "--debug", default=False,
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action="store_true", help="debug communications")
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parser.add_argument("-r", "--reset", default=False,
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action="store_true", help="do reset before")
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parser.add_argument("-b", "--bit", default=False,
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action="store_true", help="do bit test")
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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)
if args.reset:
dev.write(b"\x00") # flush any escape
dev.write_cmd("RESET_EN")
time.sleep(.1)
if args.dcm:
dev.write_cmd("DCM_EN")
dev.freq = 100e6
elif args.dcm == 0:
dev.write_cmd("DCM_DIS")
dev.freq = 50e6
dev.write_cmd("START_DIS")
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)
for channel in channels:
f = []
for frame in frames:
vi = .1*frame + channel + voltages
pi = 2*np.pi*(.01*frame + .1*channel + 0*voltages)
fi = 10e6*times/times[-1]
f.append(b"".join([
dev.frame(times, vi, order=args.order, end=False),
dev.frame(2*times, voltages, pi, fi, trigger=False),
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# dev.frame(2*times, 0*vi+.1, 0*pi, 0*fi+1e6),
# dev.frame(times, 0*vi, order=args.order, silence=True),
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]))
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
t = np.arange(2*16) * 1.
v = [-1, 0, -1]
for i in range(15):
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vi = 1 << i
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v.extend([vi - 1, vi])
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v = np.array(v)*dev.max_out/(1 << 15)
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t, v = t[:3], v[:3]
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# print(t, v)
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for channel in range(dev.num_channels):
dev.write_data(dev.multi_frame([(t, v)], channel=channel,
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order=0, map=map, shift=15,
stop=False, trigger=False))
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else:
tv = [(times, voltages)]
map = [None] * dev.num_frames
map[args.frame] = 0
dev.write_data(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
fig, ax0 = plt.subplots()
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)
vvoltages = interpolate.splev(ttimes, spline)
ax0.plot(ttimes, vvoltages, ",b", label="interpolation")
fig.savefig(args.plot)
if __name__ == "__main__":
_main()