How to init 2nd UARTin nRF52840?

RE: How to init 2nd UARTin nRF52840?

Simon — Tue, 19 Jul 2022 10:03:40 GMT

It's several years since last time I looked at the nRF5 SDK, but I'll try to help you. Could you take a look at RF52840 Two instances of UART/UARTE

Best regards,

Simon

RE: How to init 2nd UARTin nRF52840?

Jarvis.chen — Tue, 19 Jul 2022 09:24:06 GMT

Hi Simon,

Yes, I'm using "nRF5_SDK_17.1.0" with "SEGGER Embedded Studio".

Would you share some information about the development of 2 uart?

Thanks.

RE: How to init 2nd UARTin nRF52840?

Simon — Tue, 19 Jul 2022 09:19:49 GMT

Oh, it seems like you're using the nRF5 SDK, correct? My advice was for the nRF Conect SDK

For new products I would recommend you to use the nRF Connect SDK, see nRF Connect SDK and nRF5 SDK statement

Best regards,

Simon

RE: How to init 2nd UARTin nRF52840?

Simon — Tue, 19 Jul 2022 09:17:55 GMT

I think this is quite straight forward, could you try something like this:

...
...
#define UART_0 DT_LABEL(DT_NODELABEL(uart0))
#define UART_1 DT_LABEL(DT_NODELABEL(uart1))

static const struct device *uart_dev_0;
static const struct device *uart_dev_1;

void main(void)
{
    ...
    uart_dev_0 = device_get_binding(UART_0);
    uart_dev_1 = device_get_binding(UART_1);
    ...
    //Now use uart_dev_0 with the UART API to control UART0
    //and use uart_dev_1 with the UART API to control UART1
    ...
}

I haven't tested this, so let me know if you encounter any issues.

Best regards,

Simon