nRF52810 uart RX issue

[Vasa]

Hi team, I faced the following problem: there is a custom board with nRF52810 on it, UART is used on this board.

I set up Debug configuration and UART is working OK, but when I switched to Release config UART is not working properly (there is no UART RX interrupt). I managed to figure out what is wrong. In order to INIT UART (one of the settings) you have to specify RX buffer length. So, in Debug config after init function settings are correct and UART RX buffer length keeps its value and the state is INITIALIZED. If I switch to Release config UART RX buffer length is 0 and the state is UNINITIALIZED. I tried to change different combination of optimization level, but nothing works. How to solve the problem and why it happens?
IDE: Segger Studio.

[Simonr]

Hi Vasa

I'm sorry, but I'm not able to see what's wrong just looking at your functions like this. What does the uartStartRX(); function do different than nrf_drv_uart_rx();? You should be able to see an error message of some kind while debugging. What happens if you put uartStartRX(); in uart_init instead of nrf_drv_uart_rx? 

Best regards,

Simon