Using UARTE0 and UARTE1 in different pins ?

[RixtronixLAB]

Dear Members,

I saw this example,

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v15.2.0%2Fserial_uartes_example.html

I can not find this example on SDK 17,

How can I use UARTE0 and UARTE1 on separate port ? one is for debugging via USB and the other one for communicating with GPS UART ?

Any suggestions ?

Thanks

[Jared]

Hi,

The Serial port library has been deprecated and has been replaced with the libUARTE module. We have a libUARTE example in the SDK that only uses one instance but clearly shows how to define an instance and initialize it. It should be possible to repeat this for a second UARTE instance. If you want to use two UARTE instances then you have to enable both instances in the config file and resources that the module is dependent on ( Timer and PPI) . Next you have to define an instance of the module and initialize it in the project.

regards

Jared 

[RixtronixLAB]

Hi Jared,

Thanks for the reply,

I will learn this libUARTE example and keep posted,

Is libUARTE in the example working by DMA or interrupt ?

This example is not working with Softdevice, isn't it ?

Cheers

[RixtronixLAB]

Hi Jared,

In my my mind,

I'm going to use

#define RX_PIN_NUMBER  8
#define TX_PIN_NUMBER  6

with

NRF_LOG_INFO() function then

#define SER_APP_RX_PIN              NRF_GPIO_PIN_MAP(1,13)    // UART RX pin number.
#define SER_APP_TX_PIN              NRF_GPIO_PIN_MAP(1,14)  

with

void uart_event_handler calling this function :

 nrf_libuarte_drv_rx_start at nrf_libuarte_drv.h, how can I start and stop ?

Thanks

   

[Jared]

Hi,

The logging in the example is done over RTT as the UARTE is already in use in the application. The example is a loopback which means that it sends the data back after it has received it.

A NRF_LIBUARTE_ASYNC_EVT_RX_DATA event is generated each time data is received, while NRF_LIBUARTE_ASYNC_EVT_TX_DONE is generated each time data has been successfully sent. nrf_libuarte_async_tx() is used for transmitting data. 

The libUARTE module is based on the UARTE peripheral which uses EasyDMA. The example does not use the Softdevice. You can merge it with a SD example such as ble_app_beacon if you also want to use the Softdevice. 

regards

Jared 

[RixtronixLAB]

How can I " ... enable both instances in the config file and resources that the module is dependent on " ?

?

like this :

nrf_libuarte_async_config_t nrf_libuarte_async_config1 = {
            .tx_pin     = SER_APP_TX_PIN,
            .rx_pin     = SER_APP_RX_PIN,
            .baudrate   = NRF_UARTE_BAUDRATE_115200,
            .parity     = NRF_UARTE_PARITY_EXCLUDED,
            .hwfc       = NRF_UARTE_HWFC_DISABLED,
            .timeout_us = 100,
            .int_prio   = APP_IRQ_PRIORITY_LOW
    };

then on sdk_config.h ?

Thanks