/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file    COMP/COMP_CompareGpioVsVrefInt_IT/Src/main.c
  * @author  MCD Application Team
  * @brief   This example provides a short description of how to use the COMP 
  *          peripheral Interrupt.
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2020 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.
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"

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

/* 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 ---------------------------------------------------------*/
COMP_HandleTypeDef hcomp1;

/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_COMP1_Init(void);
/* USER CODE BEGIN PFP */
static void StopSequence_Config(void);
/* USER CODE END PFP */

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

/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */
  /* STM32WLxx HAL library initialization:
       - Configure the Flash prefetch
       - Systick timer is configured by default as source of time base, but user 
         can eventually implement his proper time base source (a general purpose 
         timer for example or other time source), keeping in mind that Time base 
         duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and 
         handled in milliseconds basis.
       - Set NVIC Group Priority to 4
       - Low Level Initialization
     */
  /* 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_COMP1_Init();
  /* USER CODE BEGIN 2 */
  BSP_LED_Init(LED2);
  BSP_LED_Init(LED3);

  /* Start COMP1 */
  if(HAL_COMP_Start(&hcomp1) != HAL_OK)
  {
    /* Initialization Error */
    Error_Handler(); 
  }
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
    /* Insert 5 second delay */
    HAL_Delay(5000);

    /* LED2 Off */
    BSP_LED_Off(LED2);

    /* Enter STOP mode */
    StopSequence_Config();
    /* ... STOP mode ... */
  
    /* at that point, MCU has been awoken */

    /* Re-configure the system clock */
    SystemClock_Config();

    /* LED2 On */
    BSP_LED_On(LED2);
  }
  /* USER CODE END 3 */
}

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

  /** Configure the main internal regulator output voltage
  */
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
  RCC_OscInitStruct.MSIState = RCC_MSI_ON;
  RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_11;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Configure the SYSCLKSource, HCLK, PCLK1 and PCLK2 clocks dividers
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK3|RCC_CLOCKTYPE_HCLK
                              |RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1
                              |RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.AHBCLK3Divider = RCC_SYSCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
}

/**
  * @brief COMP1 Initialization Function
  * @param None
  * @retval None
  */
static void MX_COMP1_Init(void)
{

  /* USER CODE BEGIN COMP1_Init 0 */

  /* USER CODE END COMP1_Init 0 */

  /* USER CODE BEGIN COMP1_Init 1 */

  /* USER CODE END COMP1_Init 1 */
  hcomp1.Instance = COMP1;
  hcomp1.Init.InputMinus = COMP_INPUT_MINUS_VREFINT;
  hcomp1.Init.InputPlus = COMP_INPUT_PLUS_IO1;
  hcomp1.Init.OutputPol = COMP_OUTPUTPOL_NONINVERTED;
  hcomp1.Init.Hysteresis = COMP_HYSTERESIS_LOW;
  hcomp1.Init.BlankingSrce = COMP_BLANKINGSRC_NONE;
  hcomp1.Init.Mode = COMP_POWERMODE_MEDIUMSPEED;
  hcomp1.Init.WindowMode = COMP_WINDOWMODE_DISABLE;
  hcomp1.Init.TriggerMode = COMP_TRIGGERMODE_IT_RISING_FALLING;
  if (HAL_COMP_Init(&hcomp1) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN COMP1_Init 2 */

  /* USER CODE END COMP1_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_GPIOA_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOH_CLK_ENABLE();

  /*Configure GPIO pins : PA14 PA12 PA15 PA13
                           PA11 PA10 PA0 PA9
                           PA6 PA1 PA3 PA2
                           PA7 PA4 PA5 PA8 */
  GPIO_InitStruct.Pin = GPIO_PIN_14|GPIO_PIN_12|GPIO_PIN_15|GPIO_PIN_13
                          |GPIO_PIN_11|GPIO_PIN_10|GPIO_PIN_0|GPIO_PIN_9
                          |GPIO_PIN_6|GPIO_PIN_1|GPIO_PIN_3|GPIO_PIN_2
                          |GPIO_PIN_7|GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_8;
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /*Configure GPIO pins : PB15 PB3 PB7 PB9
                           PB14 PB5 PB8 PB13
                           PB2 PB6 PB12 PB1
                           PB0 PB11 PB10 */
  GPIO_InitStruct.Pin = GPIO_PIN_15|GPIO_PIN_3|GPIO_PIN_7|GPIO_PIN_9
                          |GPIO_PIN_14|GPIO_PIN_5|GPIO_PIN_8|GPIO_PIN_13
                          |GPIO_PIN_2|GPIO_PIN_6|GPIO_PIN_12|GPIO_PIN_1
                          |GPIO_PIN_0|GPIO_PIN_11|GPIO_PIN_10;
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /*Configure GPIO pins : PC14 PC15 PC13 PC2
                           PC3 PC5 PC1 PC0
                           PC4 PC6 */
  GPIO_InitStruct.Pin = GPIO_PIN_14|GPIO_PIN_15|GPIO_PIN_13|GPIO_PIN_2
                          |GPIO_PIN_3|GPIO_PIN_5|GPIO_PIN_1|GPIO_PIN_0
                          |GPIO_PIN_4|GPIO_PIN_6;
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

  /*Configure GPIO pin : PH3 */
  GPIO_InitStruct.Pin = GPIO_PIN_3;
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOH, &GPIO_InitStruct);

}

/* USER CODE BEGIN 4 */
/**
  * @brief  Prepare the system to enter STOP mode.
  * @param  None
  * @retval None
  */

static void StopSequence_Config(void)
{
  /* Request to enter STOP mode with regulator in low power */
  HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
}
/**
  * @brief  Comparator interrupt callback.
  * @param  hcomp: COMP handle
  * @retval None
  */
void HAL_COMP_TriggerCallback(COMP_HandleTypeDef *hcomp)
{
}

/* 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 */
  while(1) 
  {
    /* Toggle LED2 */
    BSP_LED_Toggle(LED2);
	
    /* Add a delay */
    HAL_Delay(500);
  }
  /* 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,
    ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  Error_Handler();
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
