/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2020 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */
/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/
#include "main.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */

#include "stm32l152c_discovery.h"
#include "stm32l152c_discovery_glass_lcd.h"

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/
ADC_HandleTypeDef hadc;

LCD_HandleTypeDef hlcd;

/* USER CODE BEGIN PV */

	uint8_t estado = 0;
	uint8_t tiempo = 0;

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_ADC_Init(void);
static void MX_LCD_Init(void);
static void MX_TS_Init(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

	void EXTI0_IRQHandler(void) {  //PA0
		if(EXTI->PR != 0){
			estado = 1;
			EXTI->PR = 0x01;  //limpia el flag
		}
	}

	void TIM3_IRQHandler(void) {   //TOC
		if ((TIM3->SR & 0x02) == 0x02){
			TIM3->CCR1 += 65306;
			TIM3->SR &= ~ 0x02;
		}
	}

	void TIM2_IRQHandler(void) {  //TIC
		if((TIM2->SR & 0x8)!=0){
			tiempo = TIM2->CCR3;  //leer el valor
			estado = 1;
			TIM2->SR &= ~ 0x8;
		}
	}


/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */


  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_ADC_Init();
  MX_LCD_Init();
  MX_TS_Init();
  /* USER CODE BEGIN 2 */

  BSP_LCD_GLASS_Init();
  BSP_LCD_GLASS_BarLevelConfig(0);
  BSP_LCD_GLASS_Clear();

  //Configuracion del GPIO

  //Boton de inicio (PA0): USER -> entrada digital(00)
	  GPIOA->MODER &= ~(1 << (0*2 + 1));
	  GPIOA->MODER &= ~(1 << (0*2));

  //LED verde (PB7) -> funcion alternativa(10) del TIM4  (0010)
	  GPIOB->MODER |= (1 << ((7*2)+1));
	  GPIOB->MODER &= ~(1 << (7*2));
	  GPIOB->AFR[0] |= (1 << ((7*4) + 1));
	  GPIOB->AFR[0] &= ~((1 << (7*4)) | (1 << ((7*4) + 2)) | (1 << ((7*4) + 3)));

  //LED externo -> PD2 -> funcion alternativa (10) del TIM3
	  GPIOD->MODER |= (1 << ((2*2)+1));
	  GPIOD->MODER &= ~(1 << (2*2));
	  GPIOB->AFR[0] |= (0x02 <<(2*4));

  //Configuracion de la EXTI0 por flanco de bajada (PA0)

	  SYSCFG->EXTICR[0] &= ~(0x000F);
	  EXTI->IMR |= 0x01;
	  EXTI->RTSR |= 0x01;
	  EXTI->FTSR &= ~(0x01);
	  NVIC->ISER[0] |= (1 << 6);

  //Configuracion del TIM4

  //CH2-> PWM (PB7)
	  TIM4->CR1 = 0x80;
	  TIM4->CR2 = 0;
	  TIM4->SMCR = 0;
	  TIM4->CCMR1 = 0x6800;
	  TIM4->CCER = 0x0010;
	  TIM4->CNT = 0;
	  TIM4->PSC = 1;
	  TIM4->ARR = 63999;
	  TIM4->CCR2 = 0; //DC = 0 y se va a ir aumentando
	  TIM4->EGR |= 0x01;
	  TIM4->DIER = 0;  //no hay interrupcion
	  TIM4->SR = 0x00;
	  TIM4->CR1 |= 0x01;

  //Configuracion del TIM3

  //CH1 -> TOC (PD2)
	  TIM3->CR1 = 0x00;
	  TIM3->CR2 = 0;
	  TIM3->SMCR = 0;
	  TIM3->CCMR1 = 0x0030;
	  TIM3->CCER = 0x0001;
	  TIM3->CNT = 0;
	  TIM3->PSC = 244;
	  TIM3->ARR = 0xFFFF;
	  TIM3->CCR1 = 65305;
	  TIM3->EGR |= 0x01;
	  TIM3->DIER = 0x02;
	  TIM3->SR = 0x00;
	  NVIC->ISER[0] |= (1<<29);
	  TIM3->CR1 |= 0x01;

  //Configuracion del TIM2

  //CH3->TIC
	  TIM2->CR1 = 0;
	  TIM2->CR2 = 0;
	  TIM2->SMCR = 0;
	  TIM2->CCMR2 = 0x01;
	  TIM2->CCER = 0x0100;
	  TIM2->CNT = 0;
	  TIM2->PSC = 31999;
	  TIM2->ARR = 0xFFFF;
	  TIM2->CCR3 = 0;
	  TIM2->EGR |= 0x01;
	  TIM2->DIER = 0x8;
	  TIM2->SR = 0x00;
	  NVIC->ISER[0] |= (1<<28);
	  TIM2->CR1 |= 0x01;

	  short DC = 1;

  /* USER CODE END 2 */



  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
	  if(estado){
		  if((GPIOA->IDR & 0x00000001) != 0){ //compruebo que esta pulsado el boton PA0
			  //medir el tiempo

			  tiempo++;
			  //mostrarlo por la pantalla
			  BSP_LCD_GLASS_Clear();
			  BSP_LCD_GLASS_DisplayString((uint8_t *) + tiempo);

			  //ir cambiando el DC de pwm en el CCR2
			  if(tiempo < 1){  //poner 32000 -> 1 segundo
				  TIM4->CCR2 = 0;
			  }else if(tiempo < 2 && tiempo >= 1){  //32000 -> 1 seg y 64000 -> 2 seg
				  DC = 0.25;
				  TIM4->CCR2 = TIM4->ARR * DC - 1;  //15999  o tmb puede ser CCR2 = DC + 25;
			  }else if(tiempo < 3 && tiempo >= 2){  //64000 -> 2 seg y 96000 -> 3 seg
				  DC = 0.5;
				  TIM4->CCR2 = TIM4->ARR * DC - 1;  //31999
			  }else if(tiempo < 4 && tiempo >= 3){  //96000 -> 3 seg y 128000 -> 4 seg
				  DC = 0.75;
				  TIM4->CCR2 = TIM4->ARR * DC - 1;  //47999
			  }else{
				  DC = 1;
				  TIM4->CCR2 = TIM4->ARR * DC - 1;  //63999
			  }
			  estado = 0;
		  }
	  }

    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
  RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};

  /** Configure the main internal regulator output voltage
  */
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
  /** Initializes the CPU, AHB and APB busses clocks
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_LSE;
  RCC_OscInitStruct.LSEState = RCC_LSE_ON;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL6;
  RCC_OscInitStruct.PLL.PLLDIV = RCC_PLL_DIV3;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the CPU, AHB and APB busses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
  {
    Error_Handler();
  }
  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_LCD;
  PeriphClkInit.LCDClockSelection = RCC_RTCCLKSOURCE_LSE;

  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
  {
    Error_Handler();
  }
}

/**
  * @brief ADC Initialization Function
  * @param None
  * @retval None
  */
static void MX_ADC_Init(void)
{

  /* USER CODE BEGIN ADC_Init 0 */

  /* USER CODE END ADC_Init 0 */

  ADC_ChannelConfTypeDef sConfig = {0};

  /* USER CODE BEGIN ADC_Init 1 */

  /* USER CODE END ADC_Init 1 */
  /** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
  */
  hadc.Instance = ADC1;
  hadc.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;
  hadc.Init.Resolution = ADC_RESOLUTION_12B;
  hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc.Init.ScanConvMode = ADC_SCAN_DISABLE;
  hadc.Init.EOCSelection = ADC_EOC_SEQ_CONV;
  hadc.Init.LowPowerAutoWait = ADC_AUTOWAIT_DISABLE;
  hadc.Init.LowPowerAutoPowerOff = ADC_AUTOPOWEROFF_DISABLE;
  hadc.Init.ChannelsBank = ADC_CHANNELS_BANK_A;
  hadc.Init.ContinuousConvMode = DISABLE;
  hadc.Init.NbrOfConversion = 1;
  hadc.Init.DiscontinuousConvMode = DISABLE;
  hadc.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T2_CC3;
  hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_RISING;
  hadc.Init.DMAContinuousRequests = DISABLE;
  if (HAL_ADC_Init(&hadc) != HAL_OK)
  {
    Error_Handler();
  }
  /** Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time.
  */
  sConfig.Channel = ADC_CHANNEL_4;
  sConfig.Rank = ADC_REGULAR_RANK_1;
  sConfig.SamplingTime = ADC_SAMPLETIME_4CYCLES;
  if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN ADC_Init 2 */

  /* USER CODE END ADC_Init 2 */

}

/**
  * @brief LCD Initialization Function
  * @param None
  * @retval None
  */
static void MX_LCD_Init(void)
{

  /* USER CODE BEGIN LCD_Init 0 */

  /* USER CODE END LCD_Init 0 */

  /* USER CODE BEGIN LCD_Init 1 */

  /* USER CODE END LCD_Init 1 */
  hlcd.Instance = LCD;
  hlcd.Init.Prescaler = LCD_PRESCALER_1;
  hlcd.Init.Divider = LCD_DIVIDER_16;
  hlcd.Init.Duty = LCD_DUTY_1_4;
  hlcd.Init.Bias = LCD_BIAS_1_4;
  hlcd.Init.VoltageSource = LCD_VOLTAGESOURCE_INTERNAL;
  hlcd.Init.Contrast = LCD_CONTRASTLEVEL_0;
  hlcd.Init.DeadTime = LCD_DEADTIME_0;
  hlcd.Init.PulseOnDuration = LCD_PULSEONDURATION_0;
  hlcd.Init.MuxSegment = LCD_MUXSEGMENT_DISABLE;
  hlcd.Init.BlinkMode = LCD_BLINKMODE_OFF;
  hlcd.Init.BlinkFrequency = LCD_BLINKFREQUENCY_DIV8;
  if (HAL_LCD_Init(&hlcd) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN LCD_Init 2 */

  /* USER CODE END LCD_Init 2 */

}

/**
  * @brief TS Initialization Function
  * @param None
  * @retval None
  */
static void MX_TS_Init(void)
{

  /* USER CODE BEGIN TS_Init 0 */

  /* USER CODE END TS_Init 0 */

  /* USER CODE BEGIN TS_Init 1 */

  /* USER CODE END TS_Init 1 */
  /* USER CODE BEGIN TS_Init 2 */

  /* USER CODE END TS_Init 2 */

}

/**
  * @brief GPIO Initialization Function
  * @param None
  * @retval None
  */
static void MX_GPIO_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOB, LD4_Pin|LD3_Pin, GPIO_PIN_RESET);

  /*Configure GPIO pin : PC13 */
  GPIO_InitStruct.Pin = GPIO_PIN_13;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

  /*Configure GPIO pin : B1_Pin */
  GPIO_InitStruct.Pin = B1_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_EVT_RISING;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(B1_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pins : LD4_Pin LD3_Pin */
  GPIO_InitStruct.Pin = LD4_Pin|LD3_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */

  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/