chart_sample.py

# This script is licensed under BSD License, see file LICENSE.txt.
# (c) TASKING Germany GmbH, 2023
# 
# This script opens a window with chart and reads and draws values of target
# variable 'iCounter' in real-time for 5 seconds.
# Real-time access must be enabled in winIDEA:
# Debug | Debug Options | Memory Access | check 'Allow real-time ...',
#                                             uncheck 'Allow monitor ...'
# Debug | Debug Options | Update | check 'Update when running', in
#                                      group 'Update Target' check only 'Watches'
#
# This script requires 'matplotlib' to be installed.
 
 
import matplotlib
matplotlib.use('TkAgg')
 
import sys
import pylab as p
import time
 
import isystem.connect as ic
from isystem.connect import IConnectDebug as ICDebug
 
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()
 
 
ax = p.subplot(111)
canvas = ax.figure.canvas
 
if len(sys.argv) < 2:
    varName = 'main_loop_counter'
    print('No target variable name specified in cmd line, using default: ' + varName)
else:
    varName = sys.argv[1]
    print('Drawing chart for target variable: ' + varName)
 
# create the initial line
x = range(0, 500)
lineData = [0]*len(x)
line, = p.plot(x, lineData, animated=True, lw=2)
 
# define ranges on X and Y axis
p.axis([0, 500, -2000, 2000])
 
 
def run(*args):
    background = canvas.copy_from_bbox(ax.bbox)
    run.flag = True
    startTime = time.time()
 
    while run.flag:
        # restore the clean slate background
        canvas.restore_region(background)
 
        # update the data
        del lineData[0]
        # make sure real-time access is enabled in winIDEA, see description above.
        main_loop_counter = debugCtrl.evaluate(ICDebug.fRealTime, varName)
        lineData.append(main_loop_counter.getInt())
        line.set_ydata(lineData)
        
        # just draw the animated artist
        ax.draw_artist(line)
        # just redraw the axes rectangle
        canvas.blit(ax.bbox)
 
        if (time.time() - startTime) > 5:  # wait for 5 seconds
            print('Recording finished!')
            run.flag = False
 
 
p.subplots_adjust(left=0.3, bottom=0.3)  # check for flipy bugs
p.grid()  # to ensure proper background restore
manager = p.get_current_fig_manager()
manager.window.after(100, run)
 
p.show()