CAN write

  1'''
  2CAN - CAN_write.py with synchronous mode.
  3
  4This example demonstrates how to write data to another device with CAN interface from USBDAQF1CD.
  5
  6First, it shows how to open CAN port and configure CAN parameters.
  7Second, write bytes to another device.
  8Last, stop and close CAN port.
  9
 10-------------------------------------------------------------------------------------
 11Please change correct serial number or IP and port number BEFORE you run example code.
 12
 13For other examples please check:
 14    https://github.com/WPC-Systems-Ltd/WPC_Python_driver_release/tree/main/examples
 15See README.md file to get detailed usage of this example.
 16
 17Copyright (c) 2022-2024 WPC Systems Ltd. All rights reserved.
 18'''
 19
 20## Python
 21import time
 22
 23## WPC
 24
 25from wpcsys import pywpc
 26
 27def main():
 28    ## Get python driver version
 29    print(f'{pywpc.PKG_FULL_NAME} - Version {pywpc.__version__}')
 30
 31    ## Create device handle
 32    dev = pywpc.USBDAQF1CD()
 33
 34    ## Connect to device
 35    try:
 36        dev.connect("default") ## Depend on your device
 37    except Exception as err:
 38        pywpc.printGenericError(err)
 39        ## Release device handle
 40        dev.close()
 41        return
 42
 43    try:
 44        ## Parameters setting
 45        port = 1 ## Depend on your device
 46        speed = 0 ## 0 = 125 KHz, 1 = 250 kHz, 2 = 500 kHz, 3 = 1 MHz
 47        timeout = 3 ## second
 48
 49        ## Get Firmware model & version
 50        driver_info = dev.Sys_getDriverInfo(timeout)
 51        print("Model name: " + driver_info[0])
 52        print("Firmware version: " + driver_info[-1])
 53
 54        ## Open CAN
 55        err = dev.CAN_open(port, timeout)
 56        print(f"CAN_open in port {port}, status: {err}")
 57
 58        ## Set CAN port and set speed to 0
 59        err =  dev.CAN_setSpeed(port, speed, timeout)
 60        print(f"CAN_setSpeed in port {port}, status: {err}")
 61
 62        ## Set CAN port and start CAN
 63        err = dev.CAN_start(port, timeout)
 64        print(f"CAN_start in port {port}, status: {err}")
 65
 66        ## CAN_length: True: Extended, False: Standard
 67        ## CAN_type:   True: Remote, False: Data
 68
 69        ## ID: 10, data with 8 bytes, Standard & Data
 70        err = dev.CAN_write(port, 10, [33, 22, 11, 88, 77, 55, 66, 22], False, False, timeout)
 71        print(f"CAN_write in port {port}, status: {err}")
 72
 73        ## Wait for 1 sec
 74        time.sleep(1) ## delay [s]
 75
 76        ## ID: 20, data less than 8 bytes, Standard & Data
 77        err = dev.CAN_write(port, 20, [1, 2, 3], False, False, timeout)
 78        print(f"CAN_write in port {port}, status: {err}")
 79
 80        ## Wait for 1 sec
 81        time.sleep(1) ## delay [s]
 82
 83        ## Set CAN port and stop CAN
 84        err = dev.CAN_stop(port, timeout)
 85        print(f"CAN_stop in port {port}, status: {err}")
 86
 87        ## Close CAN
 88        err = dev.CAN_close(port, timeout)
 89        print(f"CAN_close in port {port}, status: {err}")
 90    except Exception as err:
 91        pywpc.printGenericError(err)
 92
 93    ## Disconnect device
 94    dev.disconnect()
 95
 96    ## Release device handle
 97    dev.close()
 98
 99    return
100
101if __name__ == '__main__':
102    main()