nRF52832 reinitialize the UART

RE: nRF52832 reinitialize the UART

ovrebekk — Wed, 20 Nov 2019 12:15:00 GMT

You should probably try to figure out why the errors happen in the first place.

If you get regular errors from the UART driver it is pointing to some issue on the bus itself, or in the configuration of the two devices, that leads to signalling issues.

Have you checked the UART lines with a scope to see if you can actually spot the issue on the bus?

What UART settings are you using?

Best regards
Torbjørn

RE: nRF52832 reinitialize the UART

Maud — Tue, 19 Nov 2019 08:47:07 GMT

That's what i try to learn. What happens in case of any error? What should i do? I am confused.

Best regards

RE: nRF52832 reinitialize the UART

ovrebekk — Tue, 19 Nov 2019 08:12:43 GMT

That seems overkill, you shouldn't have to run all that code in case of an error.

What happens if you leave the event handler empty?
Does the UART stop functioning?

Best regards
Torbjørn

RE: nRF52832 reinitialize the UART

Maud — Mon, 18 Nov 2019 13:58:03 GMT

I am using UART0 and i don't use dfu. I wrote the code below.

if (p_event->type == NRF_DRV_UART_EVT_ERROR) {
/* Clear all events. */
nrf_uart_event_clear(NRF_UART0, NRF_UART_EVENT_TXDRDY);
nrf_uart_event_clear(NRF_UART0, NRF_UART_EVENT_RXDRDY);
nrf_uart_event_clear(NRF_UART0, NRF_UART_EVENT_RXTO);
nrf_uart_event_clear(NRF_UART0, NRF_UART_EVENT_ERROR);
/* Uninitialize the UART driver. */
nrf_drv_uart_uninit(&uart);
/* Initialize the UART. */
uart_init();
}

RE: nRF52832 reinitialize the UART

ovrebekk — Mon, 18 Nov 2019 13:03:19 GMT

Which UART driver are you using?

It shouldn't be necessary to re-initialize the UART in the cause of a UART error, it is just meant as a notification to the application that there might be issues on the UART bus.

Using the serial_dfu_transport library in place of one of the regular UART drivers is not recommended, unless you want to use DFU over UART.

Best regards
Torbjørn