app_uart_put stops my code

[Juan Moya]

Hello,

I would like to capture sound using pdm driver and to get this info in the computer using uart. When I have the buffer from pdm I copy some data in a buffer to get out via uart.

This buffer is 80 bytes length and I am trying to get out every 20ms. The micro only do that, stoppping all the other tasks.

I try to use events from uart to don't stop the process:

void uart_event_handle(app_uart_evt_t * p_event){
    if(p_event->evt_type == APP_UART_TX_EMPTY ){
        //launch every new byte of the buffer

[MartinBL]

1. What do you mean by "The micro only do that, stoppping all the other tasks."?
2. Have you tried debugging your application like this?
3. Are you trying to transmit over UART from within a PDM interrupt? It could be some interrupt priority or nesting? issue.