/**
 * @author Alexandre Sales Vasconcelos (alexandre.vasconcelos@ifpb.edu.br)
 * @brief Simulation with the 7-segment display based on example in figure 15.2 of the book "Programação de Sistemas Embarcados - Desenvolvendo Software para Microcontroladores em Linguagem C" by Rodrigo de Almeida.
 * @version 0.1
 * @date 2022-07-21
 * 
 * @copyright Copyright (c) 2022
 * 
 */

#include <stdio.h>    

//freeRTOS includes 
   
#include "freertos/FreeRTOS.h" 
#include "freertos/task.h" 
      
//ESP32 includes 

#include "driver/gpio.h" 
        
//pin mapping        
#define LED_a   (1ULL<<0)    //GPIO0     
#define LED_b   (1ULL<<1)    //GPIO1   
#define LED_c   (1ULL<<2)    //GPI02
#define LED_d   (1ULL<<3)    //GPIO3
#define LED_e   (1ULL<<4)    //GPIO4
#define LED_f   (1ULL<<5)    //GPIO5
#define LED_g   (1ULL<<6)    //GPIO6
#define LED_dp  (1ULL<<7)    //GPIO7

//hex -> 7-seg
#define DIGIT_0 (LED_a | LED_b | LED_c | LED_d | LED_e | LED_f)
#define DIGIT_1 (LED_b | LED_c)
#define DIGIT_2 (LED_a | LED_b | LED_d | LED_g | LED_e | LED_d )
#define DIGIT_3 (LED_a | LED_b | LED_c | LED_d | LED_g)
#define DIGIT_4 (LED_b | LED_c | LED_f | LED_g)
#define DIGIT_5 (LED_a | LED_c | LED_d | LED_f | LED_g)
#define DIGIT_6 (LED_a | LED_c | LED_d | LED_e | LED_f | LED_g)
#define DIGIT_7 (LED_a | LED_b | LED_c)
#define DIGIT_8 (LED_a | LED_b | LED_c | LED_d | LED_e | LED_f | LED_g)
#define DIGIT_9 (LED_a | LED_b | LED_c | LED_d | LED_f | LED_g)
#define DIGIT_A (LED_a | LED_b | LED_c | LED_e | LED_f | LED_g)
#define DIGIT_b (LED_c | LED_d | LED_e | LED_f | LED_g)
#define DIGIT_C (LED_a | LED_d | LED_e | LED_f)
#define DIGIT_d (LED_b | LED_c | LED_d | LED_e | LED_g)
#define DIGIT_E (LED_a | LED_d | LED_e | LED_f | LED_g)
#define DIGIT_F (LED_a | LED_e | LED_f | LED_g)

//main task       
void app_main(void)        
{      
    // Enables GPIOx as output.
    REG_WRITE(GPIO_ENABLE_REG, LED_a | LED_b | LED_c | LED_d | LED_e | LED_f | LED_g | LED_dp);
    // Set all outputs to high.
    REG_WRITE(GPIO_OUT_W1TS_REG, LED_a | LED_b | LED_c | LED_d | LED_e | LED_f | LED_g | LED_dp);

    static const unsigned long long vetor_led[] = {DIGIT_0, DIGIT_1, DIGIT_2, DIGIT_3, DIGIT_4, DIGIT_5, DIGIT_6, 
        DIGIT_7, DIGIT_8, DIGIT_9, DIGIT_A, DIGIT_b, DIGIT_C, DIGIT_d, DIGIT_E, DIGIT_F};

    while(true) 
    {
      for (int i = 0; i <= 15; i++) {
        REG_WRITE(GPIO_OUT_W1TC_REG, vetor_led[i]);
          vTaskDelay(1000 / portTICK_PERIOD_MS);     //delay 1 secon 
        REG_WRITE(GPIO_OUT_W1TS_REG, 0x00ff); 
      }
    } 
    
}