nRF52810: how to remap uart pin(pin6 & pin8) to other pin(pin21 & pin22 or other any pins)? thanks!

Question

static void uart_init(void)
{
    // Configure UART0 pins.
    nrf_gpio_cfg_output(TX_PIN_NUMBER);///< this pin remap to pin 21
    nrf_gpio_cfg_input(RX_PIN_NUMBER, NRF_GPIO_PIN_NOPULL); ///< this pin remap to pin 22

    NRF_UART0->PSELTXD       = TX_PIN_NUMBER;///< this pin remap to pin 21
    NRF_UART0->PSELRXD       = RX_PIN_NUMBER;///< this pin remap to pin 22
    NRF_UART0->BAUDRATE      = BITRATE;

    // Clean out possible events from earlier operations
    NRF_UART0->EVENTS_RXDRDY = 0;
    NRF_UART0->EVENTS_TXDRDY = 0;
    NRF_UART0->EVENTS_ERROR  = 0;

    // Activate UART.
    NRF_UART0->ENABLE        = UART_ENABLE_ENABLE_Enabled;
    NRF_UART0->INTENSET      = 0;
    NRF_UART0->TASKS_STARTTX = 1;
    NRF_UART0->TASKS_STARTRX = 1;
}

Amanda Hsieh · Accepted Answer

Hi, 
 The easiest way is the same concept in this answer from my colleague. Y ou can just modify in the main.c to use whatever pins you want for RX and TX. 
 If you use nRF52832 DK to emulate the functionality of nRF52810 as Development kit for nRF52810 . Then, please keep in mind that P0.21 is the reset pin on nRF52832 DK. If you want to use P0.21 as GPIO, you need to add the symbol CONFIG_GPIO_AS_PINRESET to your precompiler symbols in your project. See this post . 
 -Amanda H.