DIO loopback pins

  1'''
  2DIO - DIO_loopback_pins.py with asynchronous mode.
  3
  4This example demonstrates the process of DIO loopback using pins from STEM.
  5It involves using DO pins to send signals and DI pins to receive signals on a single device, commonly known as "loopback".
  6
  7To begin with, it illustrates the steps required to open the DO and DI pins.
  8Next, it performs the operation of writing to a DO pin and reading from a DI pin.
  9Lastly, it concludes by closing the DO and DI pins.
 10
 11If your product is "STEM", please invoke the function `Sys_setDIOMode_async`.
 12
 13The DIO ports 0 to 1 are assigned to slot 1, while ports 2 to 3 are assigned to slot 2.
 14---------------------------
 15|  Slot 1    port 1 & 0   |
 16|  Slot 2    port 3 & 2   |
 17|  Slot 3    port 5 & 4   |
 18|  Slot 4    port 7 & 6   |
 19---------------------------
 20
 21-------------------------------------------------------------------------------------
 22Please change correct serial number or IP and port number BEFORE you run example code.
 23
 24For other examples please check:
 25    https://github.com/WPC-Systems-Ltd/WPC_Python_driver_release/tree/main/examples
 26See README.md file to get detailed usage of this example.
 27
 28Copyright (c) 2022-2024 WPC Systems Ltd. All rights reserved.
 29'''
 30
 31## Python
 32import asyncio
 33
 34## WPC
 35
 36from wpcsys import pywpc
 37
 38
 39async def main():
 40    ## Get Python driver version
 41    print(f'{pywpc.PKG_FULL_NAME} - Version {pywpc.__version__}')
 42
 43    ## Create device handle
 44    dev = pywpc.STEM()
 45
 46    ## Connect to device
 47    try:
 48        dev.connect("192.168.1.110") ## Depend on your device
 49    except Exception as err:
 50        pywpc.printGenericError(err)
 51        ## Release device handle
 52        dev.close()
 53        return
 54
 55    try:
 56        ## Parameters setting
 57        slot = 1 ## Connect DIO module to slot
 58        DO_port = 0
 59        DI_port = 1
 60        DO_pins = [0, 1, 2, 3]
 61        DI_pins = [4, 5, 6, 7]
 62        DO_value = [1, 0, 1, 0]
 63
 64        ## Get firmware model & version
 65        driver_info = await dev.Sys_getDriverInfo_async()
 66        print("Model name: " + driver_info[0])
 67        print("Firmware version: " + driver_info[-1])
 68
 69        ## Get slot mode
 70        slot_mode = await dev.Sys_getMode_async(slot)
 71        print("Slot mode:", slot_mode)
 72
 73        ## If the slot mode is not set to "DIO", set the slot mode to "DIO"
 74        if slot_mode != "DIO":
 75            err = await dev.Sys_setDIOMode_async(slot)
 76            print(f"Sys_setDIOMode_async in slot {slot}, status: {err}")
 77
 78        ## Get slot mode
 79        slot_mode = await dev.Sys_getMode_async(slot)
 80        print("Slot mode:", slot_mode)
 81
 82        ## Get DIO start up information
 83        info = await dev.DIO_loadStartup_async(DO_port)
 84        print("Enable:   ", info[0])
 85        print("Direction:", info[1])
 86        print("State:    ", info[2])
 87
 88        ## Write pins to high or low
 89        err = await dev.DO_writePins_async(DO_port, DO_pins, DO_value)
 90        print(f"DO_writePins_async in DO_port {DO_port}, status: {err}")
 91
 92        ## Read pins state
 93        state_list = await dev.DI_readPins_async(DI_port, DI_pins)
 94        print(f"state_list_async in DI_port {DI_port}: {state_list}")
 95    except Exception as err:
 96        pywpc.printGenericError(err)
 97
 98    ## Disconnect device
 99    dev.disconnect()
100
101    ## Release device handle
102    dev.close()
103
104    return
105
106def main_for_spyder(*args):
107    if asyncio.get_event_loop().is_running():
108        return asyncio.create_task(main(*args)).result()
109    else:
110        return asyncio.run(main(*args))
111if __name__ == '__main__':
112    asyncio.run(main()) ## Use terminal
113    # await main() ## Use Jupyter or IPython(>=7.0)
114    # main_for_spyder() ## Use Spyder