/******************************************************************************
  HEADER-FILES (Somente os arquivos necessários nesse arquivo)
******************************************************************************/
#include <stdio.h>
#include "pico/stdlib.h"
#include "hardware/gpio.h"
#include "hardware/pwm.h"
/*****************************************************************************/

/******************************************************************************
  Variaveis Globais
******************************************************************************/
#define PWM_0_PIN 8
/*****************************************************************************/
/******************************************************************************
  Prototipos das funções
******************************************************************************/
void system_init(void);
/*****************************************************************************/
/******************************************************************************
   Funcao:		int main(void)
   Entrada:		Nenhuma (void)
   Saída:		Nenhuma (void)
   Descrição:	Função principal
 *****************************************************************************/
int main() 
{
  printf("Microcontroladores - Aula 14\n");
  sleep_ms(250);

  system_init();

  while(1) 
  {
    sleep_ms(5);
  }
}
/******************************************************************************
   Funcao:		void system_init(void)
   Entrada:		Nenhuma (void)
   Saída:		Nenhuma (void)
   Descrição:	Inicializa sistema (microcontrolador e periféricos)
 *****************************************************************************/
void system_init(void)
{
  printf("Init Hardware ....\n");
  sleep_ms(10);

  // Tell GPIO they are allocated to the PWM
  gpio_set_function(PWM_0_PIN, GPIO_FUNC_PWM);

  // Find out which PWM slice is connected to GPIO
  uint slice_num = pwm_gpio_to_slice_num(PWM_0_PIN);

  // pwm freq
  pwm_set_clkdiv(slice_num, 125); // pwm clock should now be running at 1MHz

  // Set period of 100 cycles (0 to 99 inclusive)
  pwm_set_wrap(slice_num, 100);

  // Set channel A output high for one cycle before dropping
  // PWM set to 30%
  pwm_set_chan_level(slice_num, PWM_CHAN_A, 30);

  // Set the PWM running
  pwm_set_enabled(slice_num, true);

}