mirror of https://github.com/m-labs/artiq.git
pxi6733: add driver and controller
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# Yann Sionneau <ys@m-labs.hk>, 2015
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from ctypes import byref
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class DAQmxSim:
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def load_sample_values(self, values):
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pass
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def close(self):
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pass
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def done_callback_py(taskhandle, status, callback_data):
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callback_data.daq.DAQmxClearTask(taskhandle)
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callback_data.tasks.remove(taskhandle)
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class DAQmx:
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"""NI PXI6733 DAQ interface."""
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def __init__(self, device, analog_output, clock):
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import PyDAQmx as daq
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self.device = device
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self.analog_output = analog_output
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self.clock = clock
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self.tasks = []
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self.daq = daq
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def load_sample_values(self, values):
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"""Load sample values into PXI 6733 device.
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This loads sample values into the PXI 6733 device and then
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configures a task to output those samples at each clock rising
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edge.
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A callback is registered to clear the task (unallocate resources)
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when the task has completed.
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:param values: A numpy array of sample values to load in the device.
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"""
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t = self.daq.Task()
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t.CreateAOVoltageChan(self.device+b"/"+self.analog_output, b"",
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min(values), max(values),
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self.daq.DAQmx_Val_Volts, None)
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t.CfgSampClkTiming(self.clock, 1000.0, self.daq.DAQmx_Val_Rising,
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self.daq.DAQmx_Val_FiniteSamps, len(values))
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num_samps_written = self.daq.int32()
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ret = t.WriteAnalogF64(len(values), False, 0,
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self.daq.DAQmx_Val_GroupByChannel, values,
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byref(num_samps_written), None)
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if num_samps_written.value != len(values):
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raise Exception("Error: only {} sample values were written"
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.format(num_samps_written.value))
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if ret:
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raise Exception("Error while writing samples to channel's buffer")
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done_callback = self.daq.DAQmxDoneEventCallbackPtr(done_callback_py)
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self.tasks.append(t.taskHandle)
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self.daq.DAQmxRegisterDoneEvent(t.taskHandle, 0, done_callback, self)
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t.StartTask()
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def close(self):
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"""Clear all pending tasks."""
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for t in self.tasks:
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self.daq.DAQmxClearTask(t)
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@ -0,0 +1,43 @@
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#!/usr/bin/env python3
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# Yann Sionneau <ys@m-labs.hk>, 2015
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import argparse
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from artiq.protocols.pc_rpc import simple_server_loop
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from artiq.devices.pxi6733.driver import DAQmx, DAQmxSim
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from artiq.tools import verbosity_args, init_logger, simple_network_args
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def get_argparser():
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parser = argparse.ArgumentParser(description="NI PXI 6733 controller")
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simple_network_args(parser, 3256)
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parser.add_argument("-d", "--device", default=None,
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help="Device name (e.g. Dev1)."
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" Omit for simulation mode.")
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parser.add_argument("-c", "--clock", default="PFI5",
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help="Input clock pin name (default: PFI5)")
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parser.add_argument("-a", "--analog-output", default="ao0",
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help="Analog output pin name (default: ao0)")
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verbosity_args(parser)
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return parser
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def main():
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args = get_argparser().parse_args()
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init_logger(args)
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if args.device is None:
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daq = DAQmxSim()
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else:
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daq = DAQmx(bytes(args.device, "ascii"),
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bytes(args.analog_output, "ascii"),
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bytes(args.clock, "ascii"))
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try:
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simple_server_loop({"pxi6733": daq},
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args.bind, args.port)
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finally:
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daq.close()
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if __name__ == "__main__":
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main()
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@ -0,0 +1,44 @@
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import unittest
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import os
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import numpy as np
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from artiq.devices.pxi6733.driver import DAQmxSim, DAQmx
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pxi6733_device = os.getenv("PXI6733_DEVICE")
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pxi6733_analog_output = os.getenv("PXI6733_ANALOG_OUTPUT")
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pxi6733_clock = os.getenv("PXI6733_CLOCK")
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class GenericPXI6733Test:
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def test_load_sample_values(self):
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test_vector = np.array([1.0, 2.0, 3.0, 4.0], dtype=float)
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self.cont.load_sample_values(test_vector)
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self.assertTrue(True)
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def test_close_1(self):
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self.cont.close()
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self.assertTrue(True)
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def test_close_2(self):
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test_vector = np.array([1.0, 2.0, 3.0, 4.0], dtype=float)
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self.cont.load_sample_values(test_vector)
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self.cont.close()
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self.assertTrue(True)
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@unittest.skipUnless(pxi6733_device, "no hardware")
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class TestPXI6733(GenericPXI6733Test, unittest.TestCase):
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def setUp(self):
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args = dict()
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args["device"] = bytes(pxi6733_device, "ascii")
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args["analog_output"] = bytes(pxi6733_analog_output, "ascii") \
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if pxi6733_analog_output else b"ao0"
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args["clock"] = bytes(pxi6733_clock, "ascii") \
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if pxi6733_clock else b"PFI5"
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self.cont = DAQmx(**args)
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class TestPXI6733Sim(GenericPXI6733Test, unittest.TestCase):
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def setUp(self):
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self.cont = DAQmxSim()
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