I’m using BPI-M5 Debug UART… but the same symptom appears in my case. So I’m looking for the cause…
I tried everything as shown in the picture. I also checked the pin map to make sure there were no problems.
The image source is as follows. → armsom-sige5-debian-12-xfce4-arm64-20240925 And although it is broken, it seems to only have a read function and not a write function.
What kind of issue is it?
