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 emulator, 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 dataRecorderWithDAQ.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