daq_simple.py

# This script is licensed under BSD License, see file LICENSE.txt, or search for `License` in the SDK online help.
# (c) TASKING Germany GmbH, 2023
#
# This script demonstrates the usage of data acquisition, which
# provides fast periodic access to data on target. Because values are
# buffered on an debugger, this approach provides much smaller
# sampling periods than normal access with read() or evaluate()
# methods.
#
# Two locations are monitored on a running application. The acquired
# data is printed to console.
#
# See also ddata_recorder_with_daq.py
 
import isystem.connect as ic
from isystem.connect import IConnectDebug
import sys
 
 
if __name__ == '__main__':
    winidea_id = ''
 
 
    cmgr = ic.ConnectionMgr()
    cmgr.connect(ic.CConnectionConfig().instanceId(winidea_id))
 
    debugCtrl = ic.CDebugFacade(cmgr)
    debugCtrl.download()
    debugCtrl.deleteAll()
    debugCtrl.runUntilFunction('main')
    debugCtrl.waitUntilStopped()
    debugCtrl.run()
 
    # create a DAQ controller object
    daqCtrl = ic.CDAQController(cmgr)
 
    # check if DAQ system is available
    daqInfo = daqCtrl.info()
 
    if daqInfo.getMaxItems() == 0:
        print('No DAQ items exist!')
        sys.exit()
    
    print('MaxItems = ', daqInfo.getMaxItems())
 
    daqVariables = ic.DAQConfigVector()
 
    # monitor every 100ms, four bytes at address 0x400001a8, memory area 0
    daqVariables.append(ic.CDAQConfigItem(4, 0, 0x400001a8, ic.CDAQController.daqSample1s))
 
    # monitor variable main_loop_counter at maximum sampling rate
    daqVariables.append(ic.CDAQConfigItem('main_loop_counter'))
 
    daqCtrl.configure(daqVariables)
 
    # note the time of the DAQ system
    daqTimeStart = daqCtrl.status().getTime()
 
    # enable DAQ on the entire SoC
    daqCtrl.enableGlobal(True)
 
    counter = 0
    while True:
        daqStatus = daqCtrl.status()
        # if any sample is available, display the status and print the samples
        if daqStatus.getNumSamplesAvailable() > 0:
            print('Max DAQ acquisition time = ', str(daqStatus.getLastLoopTime()))
        if daqStatus.getOverflow():
            print('SAMPLING OVERFLOW!')
 
        # read available samples into daqSamples
        daqSamples = ic.DAQSampleVector()
        daqCtrl.read(daqSamples)
 
        print('Number of samples = ', str(daqSamples.size()))
        for daqSample in daqSamples:
            # print data as a hexadecimal integer. Format time in seconds
            print('  index =', str(daqSample.getIndex()),
                '  data =', hex(daqCtrl.getDataValue(daqSample).getLong()),
                '  time =', str((daqSample.getTime() - daqTimeStart)))
 
        counter += 1
 
        if counter > 100:
            break