/******************************************************************************
* HEADER-FILES (Somente os arquivos necessarios nesse arquivo)
******************************************************************************/
#include "main.h"
#include "ssd1306.h"
#include "ssd1306_graphic.h"
#include "pico/stdlib.h"
#include "hardware/i2c.h"
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <ctype.h>
#include <hardware/sync.h>
#include <stdint.h>
/*****************************************************************************/

/******************************************************************************
* Variaveis Globais
******************************************************************************/
// Buffer de tela global
uint8_t display_buffer[128 * SSD1306_HEIGHT / 8] = {0};
uint8_t estado_ignicao = 0;
uint16_t timer_execucao[NUM_TASKS];

//aqui a task de leitura anota os resultados e as tasks dos leds vem ler

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

/******************************************************************************
* Prototipos das funcoes
******************************************************************************/
void system_init(void);
void alarm_irq(void);
void init_timer_irq(void);

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

/******************************************************************************
   Funcao:		void main(void) 
   Entrada:		Nenhuma (void)
   Saída:		Nenhuma (void)
   Descrição:	Função principal
 *****************************************************************************/
int numeros [4] = {10,20,30,40};

int result_soma (int *num_vetor, int tamanho);
 
void main(void) 
{
 
 
 int total_soma = 0;

  stdio_init_all(); 
  system_init(); /* Inicializa hardware do RP2040 */
  SSD1306_init(); /* Inicializa display e pinos de comunicação */

// Limpa o buffer do display

  ssd1306_clear_buffer(display_buffer);
  ssd1306_send_data(display_buffer, 128 * SSD1306_HEIGHT / 8);
  sleep_ms(2000);

  // Escreve texto no buffer
  ssd1306_write_text(display_buffer, 32, 0, "FATEC ");
  ssd1306_write_text(display_buffer, 10, 8, "SANTO ANDRE");
  ssd1306_write_text(display_buffer, 28, 24, "T.A.P.M.");
  ssd1306_send_data(display_buffer, 128 * SSD1306_HEIGHT / 8);
  
  sleep_ms(2000);

 total_soma = result_soma (numeros, 4);
 printf("Valor total da soma %d\n", total_soma);

}
/************************************************************************************/
 
/******************************************************************************
   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(BUTTON_PIN);
    gpio_set_dir(BUTTON_PIN, GPIO_IN);
    gpio_pull_up(BUTTON_PIN); // Enable pull-up resistor

  for(int i = 0; i < 8; i++){
    gpio_init(chaves[i]);
    gpio_set_dir(chaves[i], GPIO_IN);
    gpio_pull_up(chaves[i]);

  }
   
    gpio_init(LD_1);
    gpio_set_dir(LD_1, GPIO_OUT);
    gpio_put(LD_1,0);

    gpio_init(LD_2);
    gpio_set_dir(LD_2, GPIO_OUT);
    gpio_put(LD_2,0);

    gpio_init(LD_3);
    gpio_set_dir(LD_3, GPIO_OUT);
    gpio_put(LD_3,0);

    gpio_init(LD_4);
    gpio_set_dir(LD_4, GPIO_OUT);
    gpio_put(LD_4,0);

    init_timer_irq();
}

/******************************************************************************
   Funcao:		void alarm_irq(void)
   Entrada:		Nenhuma (void)
   Saída:		Nenhuma (void)
   Descrição:	Função tratamento interrupcao do TIMER_IRQ_0
 *****************************************************************************/
void alarm_irq(void) 
{
    // Clear the alarm irq
    hw_clear_bits(&timer_hw->intr, 1u << ALARM_NUM);

    for(uint8_t cnt = 0; cnt < NUM_TASKS; cnt++)
    {
      if(timer_execucao[cnt])         timer_execucao[cnt]--;
    }

    uint64_t target = timer_hw->timerawl + DELAY;

    // Write the lower 32 bits of the target time to the alarm register, arming it.
    timer_hw->alarm[ALARM_NUM] = (uint32_t) target;

}

/******************************************************************************
   Funcao:		void init_timer_irq(void)
   Entrada:		Nenhuma (void)
   Saída:		Nenhuma (void)
   Descrição:	Função para inicialização do TIMER_IRQ_0 (100ms)
 *****************************************************************************/
void init_timer_irq(void)
{
  // Enable the interrupt for the alarm (we're using Alarm 0)
  hw_set_bits(&timer_hw->inte, 1u << ALARM_NUM) ;
  // Associate an interrupt handler with the ALARM_IRQ
  irq_set_exclusive_handler(ALARM_IRQ, alarm_irq) ;
  // Enable the alarm interrupt
  irq_set_enabled(ALARM_IRQ, true) ;
  
  uint64_t target = timer_hw->timerawl + DELAY;

  // Write the lower 32 bits of the target time to the alarm register, arming it.
  timer_hw->alarm[ALARM_NUM] = (uint32_t) target;
}
/******************************************************************************
   Funcao:		void button_callback(void)
   Entrada:		Nenhuma (void)
   Saída:		Nenhuma (void)
   Descrição:	Função tratamento interrupcao do botao
 *****************************************************************************/
 int result_soma (int *num_vetor, int tamanho){

  int total_soma = 0;

  for(int i = 0; i < tamanho; i++){

   total_soma = total_soma + *num_vetor;
   num_vetor++;
  }

  return total_soma;
 }