Counter read

  1'''
  2Counter - Counter_read.py with asynchronous mode.
  3
  4This example demonstrates how to read counter with USBDAQF1RD.
  5
  6-------------------------------------------------------------------------------------
  7Please change correct serial number or IP and port number BEFORE you run example code.
  8
  9For other examples please check:
 10    https://github.com/WPC-Systems-Ltd/WPC_Python_driver_release/tree/main/examples
 11See README.md file to get detailed usage of this example.
 12
 13Copyright (c) 2022-2024 WPC Systems Ltd. All rights reserved.
 14'''
 15
 16## Python
 17import asyncio
 18
 19## WPC
 20
 21from wpcsys import pywpc
 22
 23async def main():
 24    ## Get Python driver version
 25    print(f'{pywpc.PKG_FULL_NAME} - Version {pywpc.__version__}')
 26
 27    ## Create device handle
 28    dev = pywpc.USBDAQF1RD()
 29
 30    ## Connect to device
 31    try:
 32        dev.connect("default") ## Depend on your device
 33    except Exception as err:
 34        pywpc.printGenericError(err)
 35        ## Release device handle
 36        dev.close()
 37        return
 38
 39    try:
 40        ## Parameters setting
 41        channel = 1 ## Depend on your device
 42        edge = 0 ##  0: Falling edge, 1: Rising edge
 43        window_size = 100
 44        position = 0
 45
 46        ## Get firmware model & version
 47        driver_info = await dev.Sys_getDriverInfo_async()
 48        print("Model name: " + driver_info[0])
 49        print("Firmware version: " + driver_info[-1])
 50
 51        ## Open counter
 52        err = await dev.Counter_open_async(channel)
 53        print(f"Counter_open_async in channel {channel}, status: {err}")
 54
 55        ## Set counter edge
 56        err = await dev.Counter_setEdge_async(channel, edge)
 57        print(f"Counter_setEdge in channel {channel}, status: {err}")
 58
 59        ## Set counter frequency window size
 60        err = await dev.Counter_setFreqWindow_async(channel, window_size)
 61        print(f"Counter_setFreqWindow in channel {channel}, status: {err}")
 62
 63        ## Set counter position
 64        err = await dev.Counter_setPosition_async(channel, position)
 65        print(f"Counter_setPosition_async in channel {channel}, status: {err}")
 66
 67        ## Start counter
 68        err = await dev.Counter_start_async(channel)
 69        print(f"Counter_start_async in channel {channel}, status: {err}")
 70
 71        ## Read counter position
 72        while True:
 73            posi = await dev.Counter_readPosition_async(channel)
 74            print(f"Read counter position in channel {channel}: {posi}")
 75    except KeyboardInterrupt:
 76        print("Press keyboard")
 77
 78    except Exception as err:
 79        pywpc.printGenericError(err)
 80
 81    finally:
 82        ## Stop counter
 83        err = await dev.Counter_stop_async(channel)
 84        print(f"Counter_stop_async in channel {channel}, status: {err}")
 85
 86        ## Close counter
 87        err = await dev.Counter_close_async(channel)
 88        print(f"Counter_close_async in channel {channel}, status: {err}")
 89
 90        ## Disconnect device
 91        dev.disconnect()
 92
 93        ## Release device handle
 94        dev.close()
 95
 96    return
 97
 98def main_for_spyder(*args):
 99    if asyncio.get_event_loop().is_running():
100        return asyncio.create_task(main(*args)).result()
101    else:
102        return asyncio.run(main(*args))
103
104if __name__ == '__main__':
105    asyncio.run(main()) ## Use terminal
106    # await main() ## Use Jupyter or IPython(>=7.0)
107    # main_for_spyder() ## Use Spyder