ZEPHYR RTOS Configuring GPIO Pins

Question

Hi I would like to configure a custom GPIO pin as output to control a motor on a STM32 H743Zi board running Zephyr RTOS.

The dts file of the board can be found in the folder or a separate file nucleo h743zi.dts code.

I would like to us the arduino pin mapping provided by the board ardunio r3 connector.dtsi code

The overlay file that I've developed so far is as follows code. I would like to configure the D0 pin (as per the arduino connector dtsi file) as a GPIO pin to control the motors.

However, I've not been able to configure the pin and I don't receive a high signal if the pin is turned on.

Any help to resolve this issue is appreciated.

Long Nguyen · Answer 1 · 2021-07-16T07:52:26.227

You can refer to the answer in this link: https://github.com/zephyrproject-rtos/zephyr/discussions/35932

In my case, I use Thunderboard Sensor 2 and my solution as below:

Move to the <board.dsti> in folder /zephyr/dts/arm/silabs/efr32mg.dtsi insert your define GPIO to use:
```
 ...
 / {
 zephyr,user {
     signal-gpios = <&gpioa 8 GPIO_ACTIVE_HIGH>;
 };
 ...
```

Here, I use my board portA and pin 8 as schematic

After you save the file, open the main file of your project and insert something as below:

 #define ZEPHYR_USER_NODE DT_PATH(zephyr_user)
 ...
 void main(void)
{
 const struct gpio_dt_spec signal = 
 GPIO_DT_SPEC_GET(ZEPHYR_USER_NODE, signal_gpios);
 /* Configure the pin */
 gpio_pin_configure_dt(&signal, GPIO_OUTPUT_INACTIVE);
 ...
    while(1){
     /* Toggle the pin PA8*/
     gpio_pin_toggle(signal.port, signal.pin);
     k_msleep(SLEEP_TIME_MS);
    }
...

ZEPHYR RTOS Configuring GPIO Pins

1 Answers1