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pxi6733: add driver and controller

This commit is contained in:
Yann Sionneau 2015-04-21 16:07:18 +08:00 committed by Sebastien Bourdeauducq
parent e19f8896f0
commit 69388ccc1a
4 changed files with 156 additions and 0 deletions

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# Yann Sionneau <ys@m-labs.hk>, 2015
from ctypes import byref
class DAQmxSim:
def load_sample_values(self, values):
pass
def close(self):
pass
def done_callback_py(taskhandle, status, callback_data):
callback_data.daq.DAQmxClearTask(taskhandle)
callback_data.tasks.remove(taskhandle)
class DAQmx:
"""NI PXI6733 DAQ interface."""
def __init__(self, device, analog_output, clock):
import PyDAQmx as daq
self.device = device
self.analog_output = analog_output
self.clock = clock
self.tasks = []
self.daq = daq
def load_sample_values(self, values):
"""Load sample values into PXI 6733 device.
This loads sample values into the PXI 6733 device and then
configures a task to output those samples at each clock rising
edge.
A callback is registered to clear the task (unallocate resources)
when the task has completed.
:param values: A numpy array of sample values to load in the device.
"""
t = self.daq.Task()
t.CreateAOVoltageChan(self.device+b"/"+self.analog_output, b"",
min(values), max(values),
self.daq.DAQmx_Val_Volts, None)
t.CfgSampClkTiming(self.clock, 1000.0, self.daq.DAQmx_Val_Rising,
self.daq.DAQmx_Val_FiniteSamps, len(values))
num_samps_written = self.daq.int32()
ret = t.WriteAnalogF64(len(values), False, 0,
self.daq.DAQmx_Val_GroupByChannel, values,
byref(num_samps_written), None)
if num_samps_written.value != len(values):
raise Exception("Error: only {} sample values were written"
.format(num_samps_written.value))
if ret:
raise Exception("Error while writing samples to channel's buffer")
done_callback = self.daq.DAQmxDoneEventCallbackPtr(done_callback_py)
self.tasks.append(t.taskHandle)
self.daq.DAQmxRegisterDoneEvent(t.taskHandle, 0, done_callback, self)
t.StartTask()
def close(self):
"""Clear all pending tasks."""
for t in self.tasks:
self.daq.DAQmxClearTask(t)

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#!/usr/bin/env python3
# Yann Sionneau <ys@m-labs.hk>, 2015
import argparse
from artiq.protocols.pc_rpc import simple_server_loop
from artiq.devices.pxi6733.driver import DAQmx, DAQmxSim
from artiq.tools import verbosity_args, init_logger, simple_network_args
def get_argparser():
parser = argparse.ArgumentParser(description="NI PXI 6733 controller")
simple_network_args(parser, 3256)
parser.add_argument("-d", "--device", default=None,
help="Device name (e.g. Dev1)."
" Omit for simulation mode.")
parser.add_argument("-c", "--clock", default="PFI5",
help="Input clock pin name (default: PFI5)")
parser.add_argument("-a", "--analog-output", default="ao0",
help="Analog output pin name (default: ao0)")
verbosity_args(parser)
return parser
def main():
args = get_argparser().parse_args()
init_logger(args)
if args.device is None:
daq = DAQmxSim()
else:
daq = DAQmx(bytes(args.device, "ascii"),
bytes(args.analog_output, "ascii"),
bytes(args.clock, "ascii"))
try:
simple_server_loop({"pxi6733": daq},
args.bind, args.port)
finally:
daq.close()
if __name__ == "__main__":
main()

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artiq/test/pxi6733.py Normal file
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import unittest
import os
import numpy as np
from artiq.devices.pxi6733.driver import DAQmxSim, DAQmx
pxi6733_device = os.getenv("PXI6733_DEVICE")
pxi6733_analog_output = os.getenv("PXI6733_ANALOG_OUTPUT")
pxi6733_clock = os.getenv("PXI6733_CLOCK")
class GenericPXI6733Test:
def test_load_sample_values(self):
test_vector = np.array([1.0, 2.0, 3.0, 4.0], dtype=float)
self.cont.load_sample_values(test_vector)
self.assertTrue(True)
def test_close_1(self):
self.cont.close()
self.assertTrue(True)
def test_close_2(self):
test_vector = np.array([1.0, 2.0, 3.0, 4.0], dtype=float)
self.cont.load_sample_values(test_vector)
self.cont.close()
self.assertTrue(True)
@unittest.skipUnless(pxi6733_device, "no hardware")
class TestPXI6733(GenericPXI6733Test, unittest.TestCase):
def setUp(self):
args = dict()
args["device"] = bytes(pxi6733_device, "ascii")
args["analog_output"] = bytes(pxi6733_analog_output, "ascii") \
if pxi6733_analog_output else b"ao0"
args["clock"] = bytes(pxi6733_clock, "ascii") \
if pxi6733_clock else b"PFI5"
self.cont = DAQmx(**args)
class TestPXI6733Sim(GenericPXI6733Test, unittest.TestCase):
def setUp(self):
self.cont = DAQmxSim()