libicsneo/examples/python/apperror/apperror.py

52 lines
1.2 KiB
Python

import icsneopy
import time
#
# App errors are responses from the device indicating internal runtime errors
# NOTE: To trigger the app error in this example, disable the DW CAN 01 network on the device
# (e.g. with ICS Device Manager)
#
def apperror():
devices = icsneopy.find_all_devices()
if len(devices) == 0:
print("no devices found")
return False
device = devices[0]
print(f"selected {device}")
def on_apperror(message):
if message.get_app_error_type() != icsneopy.AppErrorType.NetworkNotEnabled:
print("unexpected app error type")
return
print(message.get_app_error_string())
filter = icsneopy.MessageFilter(icsneopy.Message.Type.AppError)
callback = icsneopy.MessageCallback(on_apperror, filter)
device.add_message_callback(callback)
if not device.open():
print("unable to open device")
return False
if not device.go_online():
print("unable to go online")
return False
frame = icsneopy.CANMessage()
frame.network = icsneopy.Network(icsneopy.Network.NetID.DWCAN_01)
frame.arbid = 0x22
frame.data = (0xAA, 0xBB, 0xCC)
if not device.transmit(frame):
print("failed to transmit frame")
return False
time.sleep(2) # wait for error to come back
return True
if __name__ == "__main__":
apperror()