daq_simple.py

# This script is licensed under BSD License, see file LICENSE.txt.
# (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
 
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