/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2019 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 */

/* USER CODE END Includes */

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

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
#define FLASH_USER_START_ADDR   0x08007C00   /* Start @ of user Flash area - last page 1 kB */
#define FLASH_USER_END_ADDR     0x08007FFF    /* End @ of user Flash area */
/* USER CODE END PD */

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

/* USER CODE END PM */

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

/* USER CODE BEGIN PV */
uint32_t Address = 0, PageError = 0;
/*Variable used for Erase procedure*/
static FLASH_EraseInitTypeDef EraseInitStruct;
uint16_t Level_mean;
uint16_t Level[20];
__IO uint16_t Level_ADC, Level_valid=0,i=0;
__IO uint16_t low_level=300;//
__IO uint16_t high_level=3500;//

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_DMA_Init(void);
static void MX_ADC_Init(void);
static void MX_NVIC_Init(void);
/* USER CODE BEGIN PFP */
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin);
//void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc);
void HAL_SYSTICK_Callback(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 */

  /* 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_DMA_Init();
  MX_ADC_Init();

  /* Initialize interrupts */
  MX_NVIC_Init();
  /* USER CODE BEGIN 2 */
  HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
  HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);

  HAL_GPIO_WritePin(RELAY_GPIO_Port, RELAY_Pin, GPIO_PIN_SET);//Close EZ
  while(HAL_ADCEx_Calibration_Start(&hadc) != HAL_OK);
  //HAL_ADC_Start(&hadc);
  //HAL_ADC_Start_IT(&hadc);
  HAL_ADC_Start_DMA(&hadc, &Level_ADC, 1);

  Address = FLASH_USER_START_ADDR;
  low_level=*(__IO uint16_t*)Address;
  Address = Address+4;
  high_level=*(__IO uint16_t*)Address;
  /* USER CODE END 2 */

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

    /* USER CODE BEGIN 3 */
	  while(Level_valid!=1);
	  if (HAL_GPIO_ReadPin(MODE_GPIO_Port, MODE_Pin)==GPIO_PIN_SET)
	  	{
		  if(Level_mean<= low_level)
	  		{
	  				HAL_GPIO_WritePin(RELAY_GPIO_Port, RELAY_Pin, GPIO_PIN_RESET);//Open EZ
	  		}
		  else if(Level_mean> high_level)
	  		{
		  			HAL_GPIO_WritePin(RELAY_GPIO_Port, RELAY_Pin, GPIO_PIN_SET);//Close EZ
			}
	  	}

	  	else
	  	{
	  		  HAL_GPIO_WritePin(RELAY_GPIO_Port, RELAY_Pin, GPIO_PIN_RESET);//Open EZ
	  	}
  }
  /* USER CODE END 3 */
}

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

  /** Initializes the CPU, AHB and APB busses clocks 
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  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_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV16;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
  {
    Error_Handler();
  }
}

/**
  * @brief NVIC Configuration.
  * @retval None
  */
static void MX_NVIC_Init(void)
{
  /* EXTI2_3_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(EXTI2_3_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(EXTI2_3_IRQn);
}

/**
  * @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_SYNC_PCLK_DIV4;
  hadc.Init.Resolution = ADC_RESOLUTION_12B;
  hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc.Init.ScanConvMode = ADC_SCAN_DIRECTION_FORWARD;
  hadc.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
  hadc.Init.LowPowerAutoWait = DISABLE;
  hadc.Init.LowPowerAutoPowerOff = DISABLE;
  hadc.Init.ContinuousConvMode = ENABLE;
  hadc.Init.DiscontinuousConvMode = DISABLE;
  hadc.Init.ExternalTrigConv = ADC_SOFTWARE_START;
  hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
  hadc.Init.DMAContinuousRequests = ENABLE;
  hadc.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;
  if (HAL_ADC_Init(&hadc) != HAL_OK)
  {
    Error_Handler();
  }
  /** Configure for the selected ADC regular channel to be converted. 
  */
  sConfig.Channel = ADC_CHANNEL_9;
  sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;
  sConfig.SamplingTime = ADC_SAMPLETIME_239CYCLES_5;
  if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN ADC_Init 2 */

  /* USER CODE END ADC_Init 2 */

}

/** 
  * Enable DMA controller clock
  */
static void MX_DMA_Init(void) 
{
  /* DMA controller clock enable */
  __HAL_RCC_DMA1_CLK_ENABLE();

  /* DMA interrupt init */
  /* DMA1_Channel1_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);

}

/**
  * @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();

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(RELAY_GPIO_Port, RELAY_Pin, GPIO_PIN_RESET);

  /*Configure GPIO pins : MODE_Pin HIGH_Pin LOW_Pin */
  GPIO_InitStruct.Pin = MODE_Pin|HIGH_Pin|LOW_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /*Configure GPIO pin : RELAY_Pin */
  GPIO_InitStruct.Pin = RELAY_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(RELAY_GPIO_Port, &GPIO_InitStruct);

  /* EXTI interrupt init*/
  HAL_NVIC_SetPriority(EXTI4_15_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(EXTI4_15_IRQn);

}

/* USER CODE BEGIN 4 */
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
	if(HAL_GPIO_ReadPin(MODE_GPIO_Port, MODE_Pin)==GPIO_PIN_RESET)
	{
		if(GPIO_Pin == LOW_Pin)
		{
			//zapis do EEPROM niskiego poziomu zbiornika
			low_level=Level_ADC;
			//HAL_GPIO_TogglePin(LED_GPIO_Port, LED_Pin);
			HAL_FLASH_Unlock();
			EraseInitStruct.TypeErase = FLASH_TYPEERASE_PAGES;
			EraseInitStruct.PageAddress = FLASH_USER_START_ADDR;
			EraseInitStruct.NbPages = 1;
			HAL_FLASHEx_Erase(&EraseInitStruct, &PageError);

			/* Program the user Flash area word by word
			    (area defined by FLASH_USER_START_ADDR and FLASH_USER_END_ADDR) ***********/
			Address = FLASH_USER_START_ADDR;
			 if(Address < FLASH_USER_END_ADDR)
			  {
			    HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, Address, low_level);
			    HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, Address+4, high_level);

			  }
			  /* Lock the Flash to disable the flash control register access (recommended
			     to protect the FLASH memory against possible unwanted operation) *********/
			  HAL_FLASH_Lock();
		}
		if(GPIO_Pin == HIGH_Pin)
		{
			//zapis do EEPROM wysokiego stanu zbiornika
			high_level=Level_ADC;
			//HAL_GPIO_TogglePin(LED_GPIO_Port, LED_Pin);
			HAL_FLASH_Unlock();
			EraseInitStruct.TypeErase = FLASH_TYPEERASE_PAGES;
			EraseInitStruct.PageAddress = FLASH_USER_START_ADDR;
			EraseInitStruct.NbPages = 1;
			HAL_FLASHEx_Erase(&EraseInitStruct, &PageError);

			/* Program the user Flash area word by word
			    (area defined by FLASH_USER_START_ADDR and FLASH_USER_END_ADDR) ***********/
			Address = FLASH_USER_START_ADDR;
			 if(Address < FLASH_USER_END_ADDR)
			  {
				HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, Address, low_level);
			    HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, Address+4, high_level);

			  }
			  /* Lock the Flash to disable the flash control register access (recommended
			     to protect the FLASH memory against possible unwanted operation) *********/
			  HAL_FLASH_Lock();

		}
	}
}

void HAL_SYSTICK_Callback(void)
{

		Level[i]=Level_ADC;
		i++;
		if(i==20)
		{
			Level_valid=1;
			i=0;
		}
		if(Level_valid==1)
		{
			Level_mean=0;
			for(uint16_t j=0;j<20;j++)
			{
				Level_mean=Level_mean+Level[j];
			}
			Level_mean=Level_mean/20;
		}
}
/*void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
{
	 if (__HAL_ADC_GET_FLAG(hadc, ADC_FLAG_EOC))
	 {
		 Level_ADC = HAL_ADC_GetValue(hadc);
	 }
}*/
/* 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(char *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****/