DIO loopback port

  1'''
  2DIO - DIO_loopback_port.py with synchronous mode.
  3
  4This example demonstrates the process of DIO loopback using port from STEM.
  5It involves using DO port to send signals and DI port 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 port.
  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 port.
 10
 11If your product is "STEM", please invoke the function `Sys_setDIOMode`.
 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) 2022-2025 WPC Systems Ltd. All rights reserved.
 29'''
 30
 31## WPC
 32from wpcsys import pywpc
 33
 34
 35def main():
 36    ## Get Python driver version
 37    print(f'{pywpc.PKG_FULL_NAME} - Version {pywpc.__version__}')
 38
 39    ## Create device handle
 40    dev = pywpc.STEM()
 41
 42    ## Connect to device
 43    try:
 44        dev.connect("192.168.1.110")  ## Depend on your device
 45    except Exception as err:
 46        pywpc.printGenericError(err)
 47        ## Release device handle
 48        dev.close()
 49        return
 50
 51    try:
 52        ## Parameters setting
 53        slot = 1  ## Connect DIO module to slot
 54        DO_port = 0
 55        DI_port = 1
 56        DO_value = [1, 0, 1, 0]
 57        timeout = 3  ## [sec]
 58
 59        ## Get firmware model & version
 60        driver_info = dev.Sys_getDriverInfo(timeout)
 61        print(f"Model name: {driver_info[0]}, Firmware version: {driver_info[-1]} ")
 62
 63        ## Get slot mode
 64        slot_mode = dev.Sys_getMode(slot, timeout)
 65        print("Slot mode:", slot_mode)
 66
 67        ## If the slot mode is not set to "DIO", set the slot mode to "DIO"
 68        if slot_mode != "DIO":
 69            err = dev.Sys_setDIOMode(slot, timeout)
 70            print(f"Sys_setDIOMode in slot {slot}, status: {err}")
 71
 72        ## Get slot mode
 73        slot_mode = dev.Sys_getMode(slot, timeout)
 74        print("Slot mode:", slot_mode)
 75
 76        ## Get DIO start up information
 77        info = dev.DIO_loadStartup(DO_port, timeout)
 78        print(f"Enable: {info[0]}")
 79        print(f"Direction: {info[1]}")
 80        print(f"State: {info[2]}")
 81
 82        ## Write DO port to high or low
 83        err = dev.DO_writePort(DO_port, DO_value, timeout)
 84        print(f"DO_writePort in DO_port {DO_port}, status: {err}")
 85
 86        ## Read DI port state
 87        state_list = dev.DI_readPort(DI_port, timeout)
 88        print(f"state_list in DI_port {DI_port}: {state_list}")
 89    except Exception as err:
 90        pywpc.printGenericError(err)
 91
 92    finally:
 93        ## Disconnect device
 94        dev.disconnect()
 95
 96        ## Release device handle
 97        dev.close()
 98
 99
100if __name__ == '__main__':
101    main()