/*******************************************************************************
 FileName:     main.c
 Dependencies: Veja a secao de includes
 Processor:    Raspberry Pico
 Compiler:     SDK 1.5.1
 Company:      FATEC Santo Andre
 Author:       Brenda Biasso; Gabriel Mendes; Nathan Santana Soares; Rafael Adolfo.
 Date:         17/10/2025
 Software License Agreement: Somente para fins didativos
 *******************************************************************************
 File Description: Leitura do Sensor ACT
 *  
 Change History:
 1.0   12/09/2024  Versao inicial (Prof. Edson Kitani).
 2.0   17/10/2025  Inclusao de estimativa de temperatura.

*******************************************************************************/
#include <stdio.h>
#include "pico/stdlib.h"
#include "hardware/adc.h"
#include <string.h>
#include <assert.h>
#include <ctype.h>
#include "pico/bootrom.h"
#include <math.h>
#include "ssd1306.h"

//====================================================================
// Definicoes do Projeto
//====================================================================
#define botao_B1     22   //GPIO22
#define IN_74LS245   15   //Configura o SN74LS245 como entrada B->A.

#define OUT_H 1
#define OUT_L 0
//===================================================================
// Variáveis Globais
//===================================================================

// Buffer de RAM de tela

uint8_t display_buffer[128 * SSD1306_HEIGHT / 8] = {0};

//===============================================================================================
void main(void)
{   
// Define variáveis
    uint16_t adc_value = 0;
    uint32_t adc_pol = 0;
    uint32_t adc_pol_a = 0;
    uint32_t mantissa = 0;
// Inicializa a UART com baud rate de 115200
    stdio_init_all();
   
// Configura o pino 22 do botão B1 para função inicial de Boot

    gpio_init(botao_B1);
    gpio_set_dir(botao_B1, GPIO_IN);

    gpio_init(IN_74LS245);
    gpio_set_dir(IN_74LS245, GPIO_OUT);
    gpio_put(IN_74LS245, OUT_L);

    bool boot = gpio_get(botao_B1);
    if(boot == 0) {reset_usb_boot(0, 0);}

// Inicializa a interface I2C e o display
    SSD1306_init();
    
// Limpa o buffer
    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, 0, 24, "Pct:");
    ssd1306_write_text(display_buffer, 88, 24, "%");
    ssd1306_send_data(display_buffer, 128 * SSD1306_HEIGHT / 8);

    sleep_ms(2000);

// Inicializa o ADC
    adc_init();

// Configura os pinos GPIO 26, 27 e 28 para ADC
    adc_gpio_init(26); // ADC0 no GPIO 26
    adc_select_input(0);        // Seleciona o canal 0, correspondente ao GPIO26
    adc_read();

while (true) 
    {
        adc_value = adc_read();     // Lê o valor do ADC
        adc_pol = 100*adc_value/4095;
        adc_pol *= 10;
        adc_pol_a = (1000*adc_value)/4095;
        mantissa = adc_pol_a - adc_pol;
        printf("mantissa %d \n", mantissa);       
        ssd1306_write_text(display_buffer, 48, 24, "              ");          //Limpa local do buffer
        if(adc_pol_a<10)
        {
        ssd1306_int_number(display_buffer, 82, 24, adc_pol_a, 6);     //Converte ASCII para display
        ssd1306_write_text(display_buffer, 76, 24, ".");
        ssd1306_int_number(display_buffer, 82, 24, mantissa, 6);     //Converte ASCII para display
        ssd1306_write_text(display_buffer, 90, 24, "     ");
        }
        if(adc_pol_a<100)
        {
        ssd1306_int_number(display_buffer, 64, 24, adc_pol_a, 6);     //Converte ASCII para display
        ssd1306_write_text(display_buffer, 74, 24, ".");
        ssd1306_int_number(display_buffer, 82, 24, mantissa, 6);     //Converte ASCII para display
        ssd1306_write_text(display_buffer, 90, 24, "     ");
        }
        if(adc_pol_a<1000)
        {
        ssd1306_int_number(display_buffer, 56, 24, adc_pol_a, 6);     //Converte ASCII para display
        ssd1306_write_text(display_buffer, 74, 24, ".");
        ssd1306_int_number(display_buffer, 82, 24, mantissa, 6);     //Converte ASCII para display
        ssd1306_write_text(display_buffer, 90, 24, "     ");
        }
        else
        {
        ssd1306_int_number(display_buffer, 48, 24, adc_pol_a, 6);     //Converte ASCII para display
        ssd1306_write_text(display_buffer, 74, 24, ".");
        ssd1306_int_number(display_buffer, 82, 24, mantissa, 6);     //Converte ASCII para display
        ssd1306_write_text(display_buffer, 90, 24, "     ");
        }
        ssd1306_send_data(display_buffer, 128 * SSD1306_HEIGHT / 8);
      sleep_ms(100);    
    }
}