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

Can you show me a snippet of your code showing me your uart_init(); and where you put the nrf_drv_uart_rx(); call outside of uart_init();? Also, what SDK version are you using?

Best regards,

Simon

[Vasa]

I used SDK15.3

mcu_status_t application_init(){
m_system.bF.gpio_state = mcu_gpio_init(kGpioPortA, kGpioPin12, kGpioPin14);
mcu_set_boot_mode();
mcu_reset();

nrf_delay_ms(50);
m_system.bF.uart_state = uart_init(UART0, kPortA, kPin5, kPortA, kPin4, DISABLE, INCLUDE, BAUD_115200);
nrf_delay_ms(50);
uartStartRx();

m_system.bF.protocol_state = mcu_protocol_init();

m_system.bF.gpio_state = 0;

#ifdef DEBUG_LOG
PRINTF(TEXT_CYAN_BOLD "Application started..." TEXT_DEFAULT "\r\n");
#endif

I wrapped nrf_drv_uart_rx() function into uartStartRx() (located after nrf_delay_ms(50);)