RE: Use 2 UARTE with SDK15

silivanov — Mon, 14 May 2018 04:15:21 GMT

It helped me a solution. but what kind of NRF_SERIAL_CONFIG_DEF?

RE: Use 2 UARTE with SDK15

shsanchez — Fri, 20 Apr 2018 17:50:05 GMT

It works perfectly.

Thanks

RE: Use 2 UARTE with SDK15

kl-cruz — Thu, 19 Apr 2018 07:11:14 GMT

Hi,

Sure!

That's right. UART1 is not supported. Serial peripheral with number 1 is only UARTE1 in nRF52840 SoC.

Required changes

To make it work with small amount of work please replace lines 77 and 78 in nRF5_SDK_15.0.0_a53641a\integration\nrfx\legacy\nrf_drv_uart.h file.

WIth code:

    #define NRF_DRV_UART_CREATE_UART(id)   _NRF_DRV_UART_CREATE_UART(id)
    #define _NRF_DRV_UART_CREATE_UART(id)  NRF_DRV_UART_CREATE_UART_##id
    #define NRF_DRV_UART_CREATE_UART_0  \
        .uart = NRFX_UART_INSTANCE(0),
    #define NRF_DRV_UART_CREATE_UART_1  \
        .uart = { .p_reg = NULL },

To achieve:

It adds support for UARTE1 in nrf_drv_uart layer.

How to catch the case when UARTE1 is using without easydma support

You can also add assert in nRF5_SDK_15.0.0_a53641a\integration\nrfx\legacy\nrf_drv_uart.c in line 115 to catch the case if somewhere UARTE1 is overriden to be used without EasyDMA support:

Please add code below:

#ifdef NRF52840_XXAA
    if (inst_idx == 1)
    {
        ASSERT(p_config->use_easy_dma);
    }
#endif

to achieve:

NRF_SERIAL with UARTE1

Please remember to use NRF_SERIAL_MODE_DMA when create instance for UARTE1 in nrf serial using NRF_SERIAL_CONFIG_DEF.

NRF_SERIAL_CONFIG_DEF(serial_config, NRF_SERIAL_MODE_DMA,
                      &serial_queues, &serial_buffs, NULL, sleep_handler);

I think it should help You. In case of any problem please let me know!