I use SDK14.2 to use serial port in 52810, port send the first byte successfully, then 52810 goes to arm_startup_nrf52810.s

[qiao]

environment:

         SDK14.2     Project: ble_app_uart

I am sure that the problem occurs in uart_module.

Uart use the app_uart_put to send the first byte successfully, then it will go to arm_startup_nrf52810.s.

Three is no logs in RTT-Viewer.

So  I want to know  whether I can user serial port in  SDK14.2?

[ovrebekk]

Hi 

Have you made any changes to the example?

Can you list the steps you go through to send a byte over the UART?
Are you connecting to a Bluetooth central device (like a smart phone) and sending some data from there?

Have you tried to run the debugger when the problem occurs? 
Then you should be able to trace the sequence of function calls leading up to the problem. 

Best regards
Torbjørn