Comments (2)
Since the system is throwing unexpected requests, it looks like the problem is a little deeper in the stack.
In the code of serialwin32.py file, the GetCommState return code is not checked.
But the return of SetCommState is checked and returns 0.
Is it appropriate to throw SerialException in this case?
from pyserial.
It seems "USB/CDC with unimplemented optional features" issue is know quite long time:
SetCommState() returns FALSE
GetLastError() returns 31 which is "A device attached to the system is not functioning".
- Ant1882/STM32F429-Tracealyzer-Demo@4cf6591
- https://stackoverflow.com/questions/71960730/how-does-getcommstate-populate-the-dcb-struct-in-windows-10-when-using-usbser-sy
- https://microsoft.public.vc.mfc.narkive.com/764Doh7S/setcommstate-fails-with-a-device-attached-to-the-system-is-not-functioning
from pyserial.
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from pyserial.