/**
 ******************************************************************************
 * @file           : main.c
 * @author         : Auto-generated by STM32CubeIDE
 * @brief          : Main program body
 ******************************************************************************
 * @attention
 *
 * Copyright (c) 2026 STMicroelectronics.
 * All rights reserved.
 *
 * This software is licensed under terms that can be found in the LICENSE file
 * in the root directory of this software component.
 * If no LICENSE file comes with this software, it is provided AS-IS.
 *
 ******************************************************************************
 */

#include <stdint.h>
#include "stm32f103xb.h"
#include "stm32f103_hal.h"
#include "lcd.h"


void delay_ms(uint16_t ms);
void delay_us(uint16_t us);


const lcd_cfg_t lcd_cfg = {
    .interface=LCD_INTERFACE_4BIT,
    .timing=LCD_TIMING_DELAY
};


int main(void)
{
  //activo los tres sets de pines
    rcc_clock_enable(RCC_GPIOA);
    rcc_clock_enable(RCC_GPIOC);
    rcc_clock_enable(RCC_GPIOB); 


    //pc-13 permanece apagado
    gpio_set_output(GPIOC, 13, GPIO_OUTPUT_PP, GPIO_SPEED_2MHZ);
    GPIOC->ODR |= (1 << 13);


//entrada para el botón
    gpio_set_input(GPIOB, 0, GPIO_INPUT_PUP);


  LCD_Init(&lcd_cfg);
  LCD_SetCursor(0, 0);
  LCD_Print("Microcontrolador");


  LCD_SetCursor(0, 1);
  LCD_Print("Tarea 2.1");


while ( (GPIOB->IDR & (1 << 0)) != 0 ){
  //esperamos a que sea presionado el botón
}


LCD_Send(LCD_CMD_CLEAR, LCD_MODE_CMD);
delay_ms(500);


//declaro mis variables
uint8_t dia = 8;
uint8_t mes = 3;
uint16_t anio = 2026;


uint8_t horas = 23;
uint8_t minutos = 59;
uint8_t segundos = 50;

  while ( 1 )
  {
//hago cálculos parciales antes de enviarlos a la función LCD_Send
  uint8_t horas_dec = ((horas/10)%10);
  uint8_t horas_units = (horas%10);
  uint8_t minutos_dec = ((minutos/10)%10);
  uint8_t minutos_units = (minutos%10);
  uint8_t segundos_dec = ((segundos/10)%10);
  uint8_t segundos_units = (segundos%10);


  uint8_t dia_dec = ((dia/10)%10);
  uint8_t dia_units = (dia%10);
  uint8_t mes_dec = ((mes/10)%10);
  uint8_t mes_units = (mes%10);


  //mando a imprimir las variables en su formato ASCII
  LCD_SetCursor(0, 0);
  LCD_Print("Fecha:");
    LCD_Send('0' + dia_dec, LCD_MODE_DATA);
    LCD_Send('0' + dia_units, LCD_MODE_DATA);
    LCD_Send('/', LCD_MODE_DATA);
    LCD_Send('0' + mes_dec, LCD_MODE_DATA);
    LCD_Send('0' + mes_units, LCD_MODE_DATA);
    LCD_Send('/', LCD_MODE_DATA);
   
    LCD_Send('2', LCD_MODE_DATA);
    LCD_Send('0', LCD_MODE_DATA);
    LCD_Send('2', LCD_MODE_DATA);
    LCD_Send('6', LCD_MODE_DATA);


    LCD_SetCursor(0, 1);
    LCD_Print("Hora: ");


    LCD_Send('0' + horas_dec, LCD_MODE_DATA);
    LCD_Send('0' + horas_units, LCD_MODE_DATA);
    LCD_Send(':', LCD_MODE_DATA);
   
    LCD_Send('0' + minutos_dec, LCD_MODE_DATA);
    LCD_Send('0' + minutos_units, LCD_MODE_DATA);
    LCD_Send(':', LCD_MODE_DATA);


    LCD_Send('0' + segundos_dec, LCD_MODE_DATA);
    LCD_Send('0' + segundos_units, LCD_MODE_DATA);


    delay_ms(700); // Esperamos aprox un segundo real
    segundos++;


  //lógica sencilla para aumento de tiempo y día
        if(segundos>=60){
          minutos++;
          segundos=0;
            if(minutos>=60){
              horas++;
              minutos=0;
                if(horas>=24){
                  dia++;
                  horas=0;
                  minutos=0;
                  segundos=0;
                }
            }
        }
  }
}


void delay_ms(uint16_t ms) {
  volatile unsigned long t = 0;
  for(uint16_t i = 0; i < ms; i++)
  {
    for(t = 0; t < 800; t++);
  }
}


void delay_us(uint16_t us)
{
  for (volatile unsigned int cycles = 0; cycles < us; cycles++);
}