1'''
2PWM - PWM_generate.py with asynchronous mode.
3
4This example demonstrates how to generate PWM with USBDAQF1AOD.
5
6First, you should set frequency and duty cycle so that it can generate proper signal.
7By the way, if you want to check PWM signal, you could connect DI pin with PWM pin.
8
9-------------------------------------------------------------------------------------
10Please change correct serial number or IP and port number BEFORE you run example code.
11
12For other examples please check:
13 https://github.com/WPC-Systems-Ltd/WPC_Python_driver_release/tree/main/examples
14See README.md file to get detailed usage of this example.
15
16Copyright (c) 2022-2025 WPC Systems Ltd. All rights reserved.
17'''
18
19## WPC
20from wpcsys import pywpc
21
22## Python
23import asyncio
24import sys
25sys.path.insert(0, 'src/')
26
27
28async def main():
29 ## Get Python driver version
30 print(f'{pywpc.PKG_FULL_NAME} - Version {pywpc.__version__}')
31
32 ## Create device handle
33 dev = pywpc.USBDAQF1AOD()
34
35 ## Connect to device
36 try:
37 dev.connect("default") ## Depend on your device
38 except Exception as err:
39 pywpc.printGenericError(err)
40 ## Release device handle
41 dev.close()
42 return
43
44 try:
45 ## Parameters setting
46 channel = 0 ## Depend on your device
47 frequency = 100
48 duty_cycle = 50
49
50 ## Get firmware model & version
51 driver_info = await dev.Sys_getDriverInfo_async()
52 print(f"Model name: {driver_info[0]}, Firmware version: {driver_info[-1]} ")
53
54 ## Open PWM
55 err = await dev.PWM_open_async(channel)
56 print(f"PWM_open_async in channel {channel}, status: {err}")
57
58 ## Set frequency
59 err = await dev.PWM_setFrequency_async(channel, frequency)
60 print(f"PWM_setFrequency_async in channel {channel}, status: {err}")
61
62 ## Set duty cycle
63 err = await dev.PWM_setDutyCycle_async(channel, duty_cycle)
64 print(f"PWM_setDutyCycle_async in channel {channel}, status: {err}")
65
66 ## Start PWM
67 err = await dev.PWM_start_async(channel)
68 print(f"PWM_start_async in channel {channel}, status: {err}")
69
70 ## Wait for seconds for generating signal
71 await asyncio.sleep(5) ## delay [sec]
72
73 ## Stop PWM
74 err = await dev.PWM_stop_async(channel)
75 print(f"PWM_stop_async in channel {channel}, status: {err}")
76
77 ## Close PWM
78 err = await dev.PWM_close_async(channel)
79 print(f"PWM_close_async in channel {channel}, status: {err}")
80 except Exception as err:
81 pywpc.printGenericError(err)
82
83 finally:
84 ## Disconnect device
85 dev.disconnect()
86
87 ## Release device handle
88 dev.close()
89
90
91def main_for_spyder(*args):
92 if asyncio.get_event_loop().is_running():
93 return asyncio.create_task(main(*args)).result()
94 else:
95 return asyncio.run(main(*args))
96
97
98if __name__ == '__main__':
99 asyncio.run(main()) ## Use terminal
100 # await main() ## Use Jupyter or IPython(>=7.0)
101 # main_for_spyder() ## Use Spyder