[NRF51822QFAC][SDK11] How to recover Uart errors

Question

Hi, 
 I'm trying to interface SIM808 with nrf51822 over uart using nrf_drv_uart. Everything works well for some time, but then uart starts reporting error code 1, NRF_UART_ERROR_PARITY_MASK, for all transactions on uart. Re-initializing the uart doesn't correct it. Also the time after which error starts appearing is also random, varies from 15 minutes to 1 hour. The problem is not with the module as when the error occurs, I can still communicate with the module using external uart to usb. Here is what I think is relevant information: 
 
 Baudrate is 115200 
 Tx is blocking 
 Listen to rx for 20ms 
 Max transaction size for rx is 10 bytes 
 
 I can upload the code, if necessary. 
 Hoping for a positive response and thanks in advance :)

Susheel Nuguru · Accepted Answer

When you get a parity error you will not get the RX complete event for that particular byte. You should do this in your uart event handler. 
 static void uart_event_handler(nrf_drv_uart_event_t * p_event, void* p_context)
{
 ...
 ...

 else if (p_event->type == NRF_DRV_UART_EVT_ERROR)
 {
 nrf_uart_event_clear(NRF_UART0, NRF_UART_EVENT_TXDRDY);
 nrf_uart_event_clear(NRF_UART0, NRF_UART_EVENT_RXTO);
 nrf_uart_event_clear(NRF_UART0, NRF_UART_EVENT_ERROR); /* thanks for correction Lalit*/
 nrf_drv_uart_uninit
 nrf_drv_uart_init
 
 }

 ...
 ...
}

[NRF51822QFAC][SDK11] How to recover Uart errors

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