nrf52832 of UART problem

[lenli]

i am using uart of nrf52832. the SDK is nRF5_SDK_12.3.0_d7731ad. the uart is app_uart .when i was testing the uart sending and receing .i find that the uart is stoping where
while (!nrf_uart_event_check(p_instance->reg.p_uart, NRF_UART_EVENT_TXDRDY)) in nrf_drv_uart.c. the meaning is uart cant get flag of the sending completely.what i cand do?

[lenli]

the testing time is about from 1 hour to 2 hours. the problem will be happen .

[RichieJH]

First thing to do is to actually see what your return value is. This will then indicate the problem.

[MartinBL]

From what context are you starting the UART? Could it be an interrupt priority or nesting issue? This is a very similar case, only the guy is using SPI.