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

#define data_pin 2
#define clock_pin 3
#define latch_pin 4

unsigned char data = 0;

void app_main(void){

  gpio_set_direction(data_pin, GPIO_MODE_OUTPUT);
  gpio_set_direction(clock_pin, GPIO_MODE_OUTPUT);
  gpio_set_direction(latch_pin, GPIO_MODE_OUTPUT);

  for(;;){
    data = 0b00111001; //dado a ser enviado
    for (int i = 7; i >= 0; i--) {
        gpio_set_level(data_pin, (data >> i) & 1);  
        gpio_set_level(clock_pin, 1);           
        gpio_set_level(clock_pin, 0);            
    }
    gpio_set_level(latch_pin, 1);
    gpio_set_level(latch_pin, 0); 
    vTaskDelay(pdMS_TO_TICKS(1000));
  }
}