What is the statement to toggle an output pin with 3.3v (the gpio of an STM32w 108cc)? I want to add a statement to the program written that indicate that the output of the gpio of the stm32 is 3.3v.pleaaaaaaaaaase I need help.

 
  
   p { margin-bottom: 0.25cm; line-height: 120%; }a:link { }

#include "contiki.h"
#include "dev/button-sensor.h"
#include "dev/leds.h"
#include "dev/gpios.h"
#include <stdio.h>
#include "board.h"


/*---------------------------------------------------------------------------*/
PROCESS(test_button_process, "Test button");
AUTOSTART_PROCESSES(&test_button_process);
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(test_button_process, ev, data)
{
   PROCESS_BEGIN();

   SENSORS_ACTIVATE(button_sensor);
   boardPrintStringDescription();
   printf("Press the button to toggle the leds.");
  
   while(1) 
   {
      PROCESS_WAIT_EVENT_UNTIL(ev == sensors_event && data == &button_sensor);
      leds_toggle(LEDS_ALL);
      gpios_toggle(GPIOS_RELAY);

       (I want to add the statement here which indicate that the output of the gpio is 3.3v)

   }
  
   PROCESS_END();
}
/*--------------------------------