How to use the second UART?

[M333_TW]

Hi

Im trying connect two peripheral devices through UART

The example project I used is "examples/peripheral/uart"

But i trace the code, it seems that the driver layer has been bound to UART 0

How do I use the another UART (uart 1)?

it must to modify the driver layer by myself?

Can you give me an example

thank you~

[Kenneth]

Hi,

Looks like the app_uart implementation have only been designed with focus of supporting 1 UART instance. The instance is hard coded in top of app_uart_fifo.c as:

static nrf_drv_uart_t app_uart_inst = NRF_DRV_UART_INSTANCE(APP_UART_DRIVER_INSTANCE);

where APP_UART_DRIVER_INSTANCE is controlled in sdk_config.h.

I recommend to check out the libuarte driver instead:
https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/lib_libuarte.html

Alternatively you can use the UART driver directly:
https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/hardware_driver_uart.html

Best regards,
Kenneth