/*****************************************************************************
   Nome do Arquivo 	: main.c

   Descrição       	: Arquivo principal prova P2, exercicio 1

   Ambiente			    : WOKWI e RP2040 C/C++ SDK

   Responsável		  : Weslley M. Torres

   Versão/Data		  : 1.0.0 - 25/03/2024 - Initial version

 *****************************************************************************/

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

/******************************************************************************
  Variaveis Globais
******************************************************************************/

#define L1      8
#define L2      7
#define L3      6
#define L4      5
#define S1      4
#define S2      3
#define S3      2
#define ADC_IO  26
#define ADC_CH  0

/*****************************************************************************/

/******************************************************************************
  Prototipos das funções
******************************************************************************/

void system_init(void);
void setup_pwm(uint8_t pino, uint32_t pwm_freq, uint16_t duty_cycle_porc);
void set_duty_cycle(uint8_t pino, uint32_t pwm_freq, uint16_t duty_cycle_porc);

/*****************************************************************************/

/******************************************************************************
   Funcao:		int main(void)
   Entrada:		Nenhuma (void)
   Saída:		Nenhuma (void)
   Descrição:	Função principal
 *****************************************************************************/
int main() 
{
  uint16_t leitura_ad = 0;
  uint32_t resultado = 0;

  stdio_init_all();

  printf("Microcontroladores - Aula 18\n");
  sleep_ms(250);

  system_init();

  while(1) 
  {
    adc_read();
    leitura_ad = adc_read();
    resultado = (leitura_ad*100) / 4096;
    set_duty_cycle(L1, 1000,resultado);
    printf("\n Valor de AD = %d", leitura_ad);
    printf("\n Valor de PWM = %d ", resultado);
    sleep_ms(150);    
  }
}

/******************************************************************************
   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);

  gpio_init(L1);
  gpio_set_dir(L1, GPIO_OUT);
  gpio_put(L1, 0);

  setup_pwm(L1, 1000, 0);

  adc_init ();
  adc_gpio_init (ADC_IO);
  adc_select_input (ADC_CH);

}

void setup_pwm(uint8_t pino, uint32_t pwm_freq, uint16_t duty_cycle_porc)
{
    uint8_t slice_num = pwm_gpio_to_slice_num(pino);
    uint8_t channel = pwm_gpio_to_channel(pino);
    uint32_t clock_sistema = 125000000; // 125MHz
    uint16_t top = clock_sistema / pwm_freq- 1;

    gpio_set_function(pino, GPIO_FUNC_PWM); // Seleciona pino como PWM
    pwm_set_wrap(slice_num, top);
    uint16_t level = (top + 1)* duty_cycle_porc / 100;
    pwm_set_chan_level(slice_num, channel, level); // Duty cycle inicial

    pwm_set_enabled(slice_num, true); // habilita PWM

}
void set_duty_cycle(uint8_t pino, uint32_t pwm_freq, uint16_t duty_cycle_porc)
{
    uint8_t slice_num = pwm_gpio_to_slice_num(pino);
    uint8_t channel = pwm_gpio_to_channel(pino);
    uint32_t clock_sistema = 125000000; // 125MHz
    uint16_t top = clock_sistema / pwm_freq- 1;

    uint16_t level = (top + 1)* duty_cycle_porc / 100; // Novo duty cycle
    pwm_set_chan_level(slice_num, channel, level);
}