NI-DAQmx Python API 備忘録

意外と設定項目が多かったのでメモ．あとで追記する．

import nidaqmx
from nidaqmx.constants import AcquisitionType, Edge

# Check NI device terminals
# using USB-6001
device = nidaqmx.system.device.Device("Dev3")
for tr in device.terminals:
    print(tr)

# Wait Trigger to PFI/0 
with nidaqmx.Task() as ditask:
    ditask.ai_channels.add_ai_voltage_chan("/Dev3/ai1")
    ditask.timing.cfg_samp_clk_timing(100, u'', Edge.RISING , AcquisitionType.FINITE) 
    ditask.triggers.start_trigger.cfg_dig_edge_start_trig("/Dev3/PFI0", Edge.RISING)
    ditask.in_stream.timeout = 200
    k=0
    ditask.read(1, 120) # sample, timeout [s];
    print(k)

Digital In/Out の例．

import nidaqmx
from nidaqmx.constants import (LineGrouping)
from nidaqmx.errors import DaqError
import time
import sys

# Mainly coded for NI USB-6001
class DAQ_task:
    def __init__(self, devID="Dev0", taskType="di",
                port="port0", lineCh="line4:7"):
        self.task = nidaqmx.Task()
        if (taskType=='di'):
            self.task.di_channels.add_di_chan(
                "/" + devID + "/" + port + "/" + lineCh,
                line_grouping=LineGrouping.CHAN_PER_LINE
            )
        elif (taskType=='do'):
            self.task.do_channels.add_do_chan(
                "/" + devID + "/" + port + "/" + lineCh,
                line_grouping=LineGrouping.CHAN_PER_LINE
            )
        else:
            print("Unknown Task type: " + taskType)
    def startAll(self):
        self.task.start()    
    def stop(self):
        self.task.stop()
        self.task.close()
    def writeDO(self, tflist):
        self.task.write(tflist)
    def readDI(self):
        return self.task.read()
    
    def demoDIO(self):
        for i in range(5):
            self.writeDO([True,False,True,False])
            print(self.readDI())
            time.sleep(.05)
            self.writeDO([False,True,False,True])
            print(self.readDI())
        self.writeDO([False,False,False,False])
'''