1'''
2DIO - DIO_loopback_port.py with asynchronous 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_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) 2022-2025 WPC Systems Ltd. All rights reserved.
29'''
30
31## WPC
32from wpcsys import pywpc
33
34## Python
35import asyncio
36import sys
37sys.path.insert(0, 'src/')
38
39
40async def main():
41 ## Get Python driver version
42 print(f'{pywpc.PKG_FULL_NAME} - Version {pywpc.__version__}')
43
44 ## Create device handle
45 dev = pywpc.STEM()
46
47 ## Connect to device
48 try:
49 dev.connect("192.168.1.110") ## Depend on your device
50 except Exception as err:
51 pywpc.printGenericError(err)
52 ## Release device handle
53 dev.close()
54 return
55
56 try:
57 ## Parameters setting
58 slot = 1 ## Connect DIO module to slot
59 DO_port = 0
60 DI_port = 1
61 DO_value = [1, 0, 1, 0]
62
63 ## Get firmware model & version
64 driver_info = await dev.Sys_getDriverInfo_async()
65 print(f"Model name: {driver_info[0]}, Firmware version: {driver_info[-1]} ")
66
67 ## Get slot mode
68 slot_mode = await dev.Sys_getMode_async(slot)
69 print("slot mode:", slot_mode)
70
71 ## If the slot mode is not set to "DIO", set the slot mode to "DIO"
72 if slot_mode != "DIO":
73 err = await dev.Sys_setDIOMode_async(slot)
74 print(f"Sys_setDIOMode_async in slot {slot}, status: {err}")
75
76 ## Get slot mode
77 slot_mode = await dev.Sys_getMode_async(slot)
78 print("slot mode:", slot_mode)
79
80 ## Get DIO start up information
81 info = await dev.DIO_loadStartup_async(DO_port)
82 print(f"Enable: {info[0]}")
83 print(f"Direction: {info[1]}")
84 print(f"State: {info[2]}")
85
86 ## Write DO port to high or low
87 err = await dev.DO_writePort_async(DO_port, DO_value)
88 print(f"DO_writePort_async in DO_port {DO_port}, status: {err}")
89
90 ## Read DI port state
91 state_list = await dev.DI_readPort_async(DI_port)
92 print(f"state_list in DI_port {DI_port}: {state_list}")
93 except Exception as err:
94 pywpc.printGenericError(err)
95
96 finally:
97 ## Disconnect device
98 dev.disconnect()
99
100 ## Release device handle
101 dev.close()
102
103
104def main_for_spyder(*args):
105 if asyncio.get_event_loop().is_running():
106 return asyncio.create_task(main(*args)).result()
107 else:
108 return asyncio.run(main(*args))
109
110
111if __name__ == '__main__':
112 asyncio.run(main()) ## Use terminal
113 # await main() ## Use Jupyter or IPython(>=7.0)
114 # main_for_spyder() ## Use Spyder