// Incompleta

#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/queue.h"
#include "driver/gpio.h"
#include "esp_log.h"

#define STCP_pin GPIO_NUM_7     // Latch
#define SHCP_pin GPIO_NUM_6     // Clock 
#define DS_pin GPIO_NUM_5       // Data

#define delay(value)  vTaskDelay( value/portTICK_PERIOD_MS )

void clock(void);
void configure_ci_setup(void);
void write_output(int8_t);
int8_t return_bin_in_display(int);

/*
*/
void app_main(void) {
  configure_ci_setup();

  for (;;) {
    for (int i = 0 ; i <= 9 ; i++) {
      write_output( return_bin_in_display(i) );
      delay(1000);
    }
    for (int i = 8 ; i >= 1 ; i--) {
      write_output( return_bin_in_display(i) );
      delay(1000);
    }
  }
}
/*
*/

// 7654321
// ABCDEFG -> sequencia de escrita

int8_t return_bin_in_display(int num) {
  switch (num) {
    case 0:
      return 0b11111100;
    case 1:
      return 0b01100000;
    case 2:
      return 0b11011010;
    case 3:
      return 0b11110010;
    case 4:
      return 0b01100110;
    case 5:
      return 0b10110110;
    case 6:
      return 0b10111110;
    case 7:
      return 0b11100000;
    case 8:
      return 0b11111111;
    case 9:
      return 0b11110111;
    default:
      exit(1);
  }
}

void write_output(int8_t num) {

  gpio_set_level(STCP_pin, GPIO_NUM_0);

  for (int8_t i = 7 ; i >= 0 ; i--) {
    if ( num & (1 << i) ) { 
        gpio_set_level(DS_pin, GPIO_NUM_0);
        clock();
    } else {
        gpio_set_level(DS_pin, GPIO_NUM_1);
        clock();
    }
  }
  
  gpio_set_level(STCP_pin, GPIO_NUM_1);
}

void configure_ci_setup(void) {
  gpio_pad_select_gpio(STCP_pin);
  gpio_pad_select_gpio(SHCP_pin);
  gpio_pad_select_gpio(DS_pin);

  gpio_set_direction(STCP_pin, GPIO_MODE_OUTPUT);
  gpio_set_direction(SHCP_pin, GPIO_MODE_OUTPUT);
  gpio_set_direction(DS_pin, GPIO_MODE_OUTPUT);

}

void clock(void) {
  gpio_set_level(SHCP_pin, GPIO_NUM_1);
  gpio_set_level(SHCP_pin, GPIO_NUM_0);
}