Drive Strength of UART pins

[mexco]

 I need to use High Drive Strength of pin used as TX of UART. How may it be done using zephyr ?

[mexco]

Hi.. I need same again but without using pinctrl. I need to use following style to set drive strentgh.

&uart2{

    current-speed = < 115200 >;

    tx-pin = <2>;

    rx-pin = <3>;

    status = "okay";

};

How , may it be done ?

Meanwhile, I temporarily added following  function and called it in uart_init() function by manually writing Pin Number as below:

NRF_STATIC_INLINE void nrf_gpio_cfg_output_strong(uint32_t pin_number)

{

    nrf_gpio_cfg(

        pin_number,

        NRF_GPIO_PIN_DIR_OUTPUT,

        NRF_GPIO_PIN_INPUT_DISCONNECT,

        NRF_GPIO_PIN_NOPULL,

        NRF_GPIO_PIN_H0H1,

        NRF_GPIO_PIN_NOSENSE);

}

void uart_init()

{

  ... 

  nrf_gpio_cfg_output_strong(2); // used Tx pin of UART2

  ......

}

Though above method worked very well, but is not recommendable, because Pin Number got fixed. How to get Pin Number as set in overlay file instead of fixed, I don't know ?

[Sigurd Hellesvik]

Hi,

Which version of the nRF Connect SDK do you use?

Regards,
Sigurd Hellesvik

[mexco]

SDK1.9.1. 

[Sigurd Hellesvik]

Try to get the pin number like this:

DT_PROP(DT_NODELABEL(uart0), tx_pin)

Regards,
Sigurd Hellesvik