DIO loopback pins

  1'''
  2DIO - DIO_loopback_pins.py with synchronous 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`.
 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        timeout = 3  ## [sec]
 55        DO_port = 0
 56        DI_port = 1
 57        DO_pins = [0, 1, 2, 3]
 58        DI_pins = [4, 5, 6, 7]
 59        DO_value = [1, 0, 1, 0]
 60
 61        ## Get firmware model & version
 62        driver_info = dev.Sys_getDriverInfo(timeout)
 63        print(f"Model name: {driver_info[0]}, Firmware version: {driver_info[-1]} ")
 64
 65        ## Get slot mode
 66        slot_mode = dev.Sys_getMode(slot, timeout)
 67        print("Slot mode:", slot_mode)
 68
 69        ## If the slot mode is not set to "DIO", set the slot mode to "DIO"
 70        if slot_mode != "DIO":
 71            err = dev.Sys_setDIOMode(slot, timeout)
 72            print(f"Sys_setDIOMode in slot {slot}, status: {err}")
 73
 74        ## Get slot mode
 75        slot_mode = dev.Sys_getMode(slot, timeout)
 76        print("Slot mode:", slot_mode)
 77
 78        ## Get DIO start up information
 79        info = dev.DIO_loadStartup(DO_port, timeout)
 80        print(f"Enable: {info[0]}")
 81        print(f"Direction: {info[1]}")
 82        print(f"State: {info[2]}")
 83
 84        ## Write pins to high or low
 85        err = dev.DO_writePins(DO_port, DO_pins, DO_value, timeout)
 86        print(f"DO_writePins in DO_port {DO_port}, status: {err}")
 87
 88        ## Read pins state
 89        state_list = dev.DI_readPins(DI_port, DI_pins, timeout)
 90        print(f"state_list in DI_port {DI_port}: {state_list}")
 91    except Exception as err:
 92        pywpc.printGenericError(err)
 93
 94    finally:
 95        ## Disconnect device
 96        dev.disconnect()
 97
 98        ## Release device handle
 99        dev.close()
100
101
102if __name__ == '__main__':
103    main()