Change GPIOD usage case from ctxless to request mode

[2q1w2007]

I find that on my rpi4 when using GPIOD as GPIO method, the GPIO only turn on sudden and turn off immediately.
I tried control with a simple python script and GPIOD is worked.
The edifference between python and direwolf is that direwolf use a ctxless gpiod function, which will reset immediately on my RPI4.
Thus I changed the source to make GPIOD work in request mode as python script.
Now it works well on my rpi4.

[wb2osz]

Thank you for this problem report and suggested fix.
I tested on different RPi models but not the model 4.
There might be differences in behavior for different models.
I will take a close look at this.

Thanks & 73,
John WB2OSZ

[2q1w2007]

Thank you for your timely reply.
Actually I cannot understand why original ctxless function didn't work, based on document at https://libgpiod-dlang.dpldocs.info/gpiod.gpiod_ctxless_set_value.html , it seems ctxless function should work.
I found an issue at brgl/libgpiod#40 which may related to this issue.
I'm not good at C program so I don't know if my handle method appreciate, but it do work well on my rpi4 now😂

73
BI2SC