/*******************************************************************************
 FileName:     main.c
 Dependencies: Veja a secao de includes
 Processor:    Raspberry Pico
 Compiler:     SDK 1.5.1
 Company:      FATEC Santo Andre
 Author:       Prof. Edson Kitani
 Date:         17/04/2025
 Software License Agreement: Somente para fins didativos
 *******************************************************************************
 File Description: Controla Saídas Digitais e PWM  - Já com Multicore
 *  
 Change History:
 1.0   12/09/2025  Versao inicial

*******************************************************************************/
#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 "ssd1306.h"
#include "pico/time.h" 

#include "pico/multicore.h" 
//#include "pcf8574.h"
#include "hardware/pwm.h"
#include "hardware/clocks.h"
#include "pwm_fatec.h"

//====================================================================
// Definicoes do Projeto
//====================================================================

#define IN_74LS245 15 //Configura o SN74LS245 como entrada B->A.
#define botao_B1      22   //GPIO22.
#define PWM_PIN       9
//==================================================================
// Protótipos das Funções

static void core1_entry(void);

//===================================================================
// Variáveis Globais


//===================================================================
// Buffer de RAM de tela

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

//===============================================================================================
void main(void)
{
    gpio_init(IN_74LS245);
    gpio_set_dir(IN_74LS245, GPIO_OUT);
    gpio_put(IN_74LS245, 0);
// Configura o pino 22 do botão B1 para função inicial de Boot

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

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

// Inicializa a UART com baud rate de 115200 e Sensor Ultrassom

    stdio_init_all();    
   
// 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, 0, 24, "PWM=            ");
    ssd1306_send_data(display_buffer, 128 * SSD1306_HEIGHT / 8);

// Ativa o Core 1 para cuidar do temporizador e das interrupções associadas
    //multicore_launch_core1(core1_entry);

    sleep_ms(2000);

    pwm_init_pin(PWM_PIN);

    while (true) 
    {
        
        for (uint8_t i = 0; i <= 100; i += 1) 
        {
            pwm_set_duty_percent(PWM_PIN, i);
            ssd1306_write_text(display_buffer, 48, 24, "    %");              //Limpa local do buffer
            ssd1306_int_number(display_buffer, 48, 24, i, 3);           //Converte ASCII para display
            // Atualiza o display com o conteúdo do buffer
            ssd1306_send_data(display_buffer, 128 * SSD1306_HEIGHT / 8);
            sleep_ms(200);
            bool stop = gpio_get(botao_B1);
            while(!stop)
            {
                stop = gpio_get(botao_B1);
            }
        }
        sleep_ms(1000);
        for (int8_t i = 100; i >= 0; i -= 1) 
        {
            pwm_set_duty_percent(PWM_PIN, i);
            ssd1306_write_text(display_buffer, 48, 24, "    %");              //Limpa local do buffer
            ssd1306_int_number(display_buffer, 48, 24, i, 3);           //Converte ASCII para display
            // Atualiza o display com o conteúdo do buffer
            ssd1306_send_data(display_buffer, 128 * SSD1306_HEIGHT / 8);
            sleep_ms(200);
            bool stop = gpio_get(botao_B1);
            while(!stop)
            {
               stop = gpio_get(botao_B1);
            }
        }
        sleep_ms(1000);
    }
}

//============================================================================================================================================





//******************************************************************************************************************************************/
//                                                /*   CORE 1 */
//*****************************************************************************************************************************************/

static void core1_entry(void)
{
//=================================================================================================================
// ÁREA DAS INTERRUPÇÕES E FUNÇÕES
//================================================================================================================ 


        while (true)
        {
            //tight_loop_contents(); //Evita otimização do compilador para While vazio
            sleep_ms(100);
        }
  

}