ttyS0 is make stack on the boot

I have vim3l board which having android os and i want to use ttyS0 port but when i connect Rx and Tx it’s stack on the khadas pic.

The ttyS0 is configured as the debug console by default, if you want to use it as a debug console, please check here: VIM3/3L Setup Serial Debug Console [Khadas Docs]

If you want to use it as a normal uart port you may need to change the source code and rebuild the image.

Hi @numbqq
I just want to use as normal uart so can you tell me what changes required to change in source code.

Duplicated issue, will followup here: How to disable UART communication(ttyS0) - #3 by Pradeep_Kumar_Upadhy