def test_Worker_DAQ___rate():
print_title("Worker_DAQ - INTERNAL_TIMER - DAQ rate")
def DAQ_function():
# Must return True when successful, False otherwise
reply = dev.fake_query_1()
dprint(" " * 50 + "%.1f Hz" % qdev.obtained_DAQ_rate_Hz)
return reply[-4:] == "0101"
app = create_QApplication()
dev = FakeDevice()
qdev = QDeviceIO(dev)
# fmt: off
qdev.create_worker_DAQ(DAQ_trigger=DAQ_TRIGGER.INTERNAL_TIMER,
DAQ_function=DAQ_function,
DAQ_interval_ms=10,
critical_not_alive_count=1,
debug=DEBUG)
# fmt: on
assert qdev.start() == True
# Simulate device runtime
start_time = time.perf_counter()
while time.perf_counter() - start_time < 1.51:
app.processEvents()
time.sleep(0.001) # Do not hog the CPU
tprint("About to quit")
app.processEvents()
assert qdev.quit() == True
app.quit()
assert 9 <= qdev.obtained_DAQ_interval_ms <= 11
assert 99 <= qdev.obtained_DAQ_rate_Hz <= 101
def test_Worker_DAQ___quit_without_start():
print_title("Worker_DAQ - quit without start")
app = create_QApplication()
qdev = QDeviceIO(FakeDevice())
qdev.create_worker_DAQ()
tprint("About to quit")
app.processEvents()
assert qdev.quit() == True
app.quit()
def test_Worker_DAQ___no_device_attached():
print_title("Worker_DAQ - no device attached")
import pytest
qdev = QDeviceIO()
with pytest.raises(SystemExit) as pytest_wrapped_e:
qdev.create_worker_DAQ()
assert pytest_wrapped_e.type == SystemExit
dprint("Exit code: %i" % pytest_wrapped_e.value.code)
assert pytest_wrapped_e.value.code == 99
def test_Worker_DAQ___CONTINUOUS(start_alive=True):
print_title("Worker_DAQ - CONTINUOUS" +
("" if start_alive else " - start dead"))
def DAQ_function():
# Must return True when successful, False otherwise
time.sleep(0.1) # Simulate blocking processing time on the device
reply = dev.fake_query_1()
return reply[-4:] == "0101"
app = create_QApplication()
dev = FakeDevice(start_alive=start_alive)
qdev = QDeviceIO(dev)
# fmt: off
qdev.create_worker_DAQ(
DAQ_trigger=DAQ_TRIGGER.CONTINUOUS,
DAQ_function=DAQ_function,
critical_not_alive_count=1,
debug=DEBUG,
)
# fmt: on
qdev.signal_DAQ_updated.connect(process_DAQ_updated)
qdev.signal_DAQ_paused.connect(process_DAQ_paused)
assert qdev.start() == start_alive
# Immediately fire a call to test if the worker is ready for it
qdev.unpause_DAQ()
# Simulate device runtime
start_time = time.perf_counter()
QtCore.QTimer.singleShot(300, qdev.pause_DAQ)
QtCore.QTimer.singleShot(600, qdev.unpause_DAQ)
QtCore.QTimer.singleShot(900, qdev.pause_DAQ)
QtCore.QTimer.singleShot(1200, qdev.unpause_DAQ)
while time.perf_counter() - start_time < 1.6:
app.processEvents()
if dev.count_commands == 12:
break
time.sleep(0.001) # Do not hog the CPU
tprint("About to quit")
app.processEvents()
assert qdev.quit() == True
app.quit()
if start_alive:
assert dev.count_commands >= 10
assert dev.count_replies >= 10
assert (cnt_DAQ_updated >= 9
) # Last signal is not always received before thread is quit
assert cnt_DAQ_paused == 3
def test_Worker_DAQ___lose_connection():
print_title("Worker_DAQ - INTERNAL_TIMER - lose connection")
def DAQ_function():
# Must return True when successful, False otherwise
if qdev.update_counter_DAQ == 10:
dev.is_alive = False
reply = dev.fake_query_1()
return reply[-4:] == "0101"
# NOTE: The global 'go' mechanism used here is a quick and dirty way to
# pytest. In production, it should be implemented by an boolean external
# class member.
global go
go = True
@QtCore.pyqtSlot()
def process_connection_lost():
tprint("---> received: connection_lost")
global go
go = False
app = create_QApplication()
dev = FakeDevice()
# Forcefully remove members as extra test
del dev.name
del dev.is_alive
qdev = QDeviceIO(dev)
# fmt: off
qdev.create_worker_DAQ(DAQ_trigger=DAQ_TRIGGER.INTERNAL_TIMER,
DAQ_function=DAQ_function,
DAQ_interval_ms=20,
critical_not_alive_count=3,
debug=DEBUG)
# fmt: on
qdev.create_worker_jobs(debug=DEBUG)
qdev.signal_connection_lost.connect(process_connection_lost)
assert qdev.start() == True
# Simulate device runtime
while go:
app.processEvents()
time.sleep(0.001) # Do not hog the CPU
tprint("About to quit")
app.processEvents()
assert qdev.quit() == True
assert qdev.quit() == True # Twice, to check for msg 'already closed'.
app.quit()
def test_Worker_DAQ___SINGLE_SHOT_WAKE_UP(start_alive=True):
print_title("Worker_DAQ - SINGLE_SHOT_WAKE_UP" +
("" if start_alive else " - start dead"))
def DAQ_function():
# Must return True when successful, False otherwise
reply = dev.fake_query_1()
return reply[-4:] == "0101"
app = create_QApplication()
dev = FakeDevice(start_alive=start_alive)
qdev = QDeviceIO(dev)
# fmt: off
qdev.create_worker_DAQ(DAQ_trigger=DAQ_TRIGGER.SINGLE_SHOT_WAKE_UP,
DAQ_function=DAQ_function,
critical_not_alive_count=1,
debug=DEBUG)
# fmt: on
qdev.signal_DAQ_updated.connect(process_DAQ_updated)
assert qdev.start() == start_alive
# Immediately fire a call to test if the worker is ready for it
qdev.wake_up_DAQ()
# Simulate device runtime
start_time = time.perf_counter()
QtCore.QTimer.singleShot(300, qdev.wake_up_DAQ)
QtCore.QTimer.singleShot(600, qdev.wake_up_DAQ)
while time.perf_counter() - start_time < 1:
app.processEvents()
time.sleep(0.001) # Do not hog the CPU
tprint("About to quit")
app.processEvents()
assert qdev.quit() == True
app.quit()
if start_alive:
assert dev.count_commands == 3
assert dev.count_replies == 3
assert cnt_DAQ_updated == 3
def test_Worker_DAQ___INTERNAL_TIMER(start_alive=True):
print_title("Worker_DAQ - INTERNAL_TIMER" +
("" if start_alive else " - start dead"))
def DAQ_function():
# Must return True when successful, False otherwise
reply = dev.fake_query_1()
return reply[-4:] == "0101"
app = create_QApplication()
dev = FakeDevice(start_alive=start_alive)
qdev = QDeviceIO(dev)
# fmt: off
qdev.create_worker_DAQ(DAQ_trigger=DAQ_TRIGGER.INTERNAL_TIMER,
DAQ_function=DAQ_function,
DAQ_interval_ms=100,
critical_not_alive_count=10,
debug=DEBUG)
# fmt: on
qdev.signal_DAQ_updated.connect(process_DAQ_updated)
assert qdev.start() == start_alive
# Simulate device runtime
start_time = time.perf_counter()
while time.perf_counter() - start_time < 1:
app.processEvents()
if dev.count_commands == 3:
break
time.sleep(0.001) # Do not hog the CPU
tprint("About to quit")
app.processEvents()
assert qdev.quit() == True
app.quit()
if start_alive:
assert dev.count_commands >= 3
assert dev.count_replies >= 3
assert (cnt_DAQ_updated >= 2
) # Last signal is not always received before thread is quit
def test_Worker_DAQ___ILLEGAL_DAQ_FUNCTION():
print_title("Worker_DAQ - ILLEGAL_DAQ_FUNCTION")
def DAQ_function():
# Must return True when successful, False otherwise
if qdev.update_counter_DAQ == 2:
0 / 0
else:
reply = dev.fake_query_1()
return reply[-4:] == "0101"
app = create_QApplication()
dev = FakeDevice()
qdev = QDeviceIO(dev)
# fmt: off
qdev.create_worker_DAQ(DAQ_trigger=DAQ_TRIGGER.INTERNAL_TIMER,
DAQ_function=DAQ_function,
DAQ_interval_ms=100,
debug=DEBUG)
# fmt: on
qdev.signal_DAQ_updated.connect(process_DAQ_updated)
assert qdev.start() == True
# Simulate device runtime
start_time = time.perf_counter()
while time.perf_counter() - start_time < 1:
app.processEvents()
if dev.count_commands == 3:
break
time.sleep(0.001) # Do not hog the CPU
tprint("About to quit")
app.processEvents()
assert qdev.quit() == True
app.quit()
lambda filepath: window.qpbt_record.setText("Recording to file: %s" %
filepath))
log.signal_recording_stopped.connect(
lambda: window.qpbt_record.setText("Click to start recording to file"))
# --------------------------------------------------------------------------
# Set up multithreaded communication with the Arduino
# --------------------------------------------------------------------------
# Create QDeviceIO
qdev_ard = QDeviceIO(ard)
# Create workers
qdev_ard.create_worker_DAQ(
DAQ_function=DAQ_function,
DAQ_interval_ms=DAQ_INTERVAL_MS,
critical_not_alive_count=1,
debug=DEBUG,
)
qdev_ard.create_worker_jobs(debug=DEBUG)
# Connect signals to slots
qdev_ard.signal_DAQ_updated.connect(window.update_GUI)
qdev_ard.signal_connection_lost.connect(notify_connection_lost)
# Hack. TODO: Implement start/stop in `QDeviceIO`
def start_stop():
qdev_ard.worker_DAQ.DAQ_function = (
DAQ_function if window.qpbt_running.isChecked() else None)
window.qpbt_running.clicked.connect(start_stop)
def __init__(self, qdev):
self.qdev = qdev
self.name = "Sync"
def tick(self):
self.qdev.wake_up_DAQ()
return True
sync = MasterSync(qdev_ard)
qdev_sync = QDeviceIO(sync)
# Create workers
# fmt: off
qdev_ard.create_worker_DAQ(
DAQ_trigger = DAQ_TRIGGER.SINGLE_SHOT_WAKE_UP,
DAQ_function = DAQ_function,
debug = DEBUG,
)
qdev_sync.create_worker_DAQ(
DAQ_trigger = DAQ_TRIGGER.INTERNAL_TIMER,
DAQ_function = sync.tick,
DAQ_interval_ms = DAQ_INTERVAL_MS,
critical_not_alive_count = 1,
debug = DEBUG,
)
# fmt: on
# Connect signals to slots
qdev_ard.signal_DAQ_updated.connect(update_terminal)
qdev_ard.signal_connection_lost.connect(notify_connection_lost)
# Main
# ------------------------------------------------------------------------------
if __name__ == "__main__":
app = QtWid.QApplication(sys.argv)
app.aboutToQuit.connect(about_to_quit)
window = MainWindow()
# Fake a device that generates data at a sampling rate of `Fs` Hz. The
# data gets generated and transferred to our HistoryChartCurve-instance from
# out of a separate thread. This is taken care of by QDeviceIO.
class FakeDevice:
def __init__(self):
self.name = "FakeDevice"
self.is_alive = True
qdev = QDeviceIO(dev=FakeDevice())
qdev.create_worker_DAQ(DAQ_interval_ms=WORKER_DAQ_INTERVAL_MS,
DAQ_function=DAQ_function)
qdev.signal_DAQ_updated.connect(window.update_GUI)
qdev.start()
# Chart refresh timer
timer_chart = QtCore.QTimer(timerType=QtCore.Qt.PreciseTimer)
timer_chart.timeout.connect(window.update_charts)
timer_chart.start(CHART_DRAW_INTERVAL_MS)
window.show()
sys.exit(app.exec_())