/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2024 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 */
#include <string.h>
#include <stdio.h>
/* USER CODE END Includes */

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

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
uint8_t dutyCycle = 100;
uint32_t startTime = 0;

uint16_t p1_threshold = 5;
uint16_t p2_threshold = 10;
uint16_t p3_threshold = 0;
uint16_t p4_threshold = 100;
uint32_t p5_threshold = 190;
uint32_t p6_threshold = 480;

uint32_t p1Count = 0;
uint32_t p2Count = 0;
uint32_t p3Count = 0;
uint32_t p4Count = 0;
uint32_t p5Count = 0;
uint32_t p6Count = 0;

#define AVGLEN  30
//#define ADC_BUFFER_SIZE 9
uint32_t adc_samples = 0;
#define ADC_BUFFER_SIZE 9
volatile uint16_t adc_buffer[ADC_BUFFER_SIZE];
//volatile uint16_t adc_buffer[ADC_BUFFER_SIZE];
//uint16_t adc_buffer[8+1];
//uint8_t adcOutputBufferIndex = 0;
unsigned char i;
uint32_t p1PcsPerCc, p2PcsPerCc, p3PcsPerCc, p4PcsPerCc, p5PcsPerCc, p6PcsPerCc;

unsigned int p1CountBufferIndex = 0;
unsigned int p2CountBufferIndex = 0;
unsigned int p3CountBufferIndex = 0;
unsigned int p4CountBufferIndex = 0;
unsigned int p5CountBufferIndex = 0;
unsigned int p6CountBufferIndex = 0;

uint32_t p1CountSnapshot = 0;
uint32_t p2CountSnapshot = 0;
uint32_t p3CountSnapshot = 0;
uint32_t p4CountSnapshot = 0;
uint32_t p5CountSnapshot = 0;
uint32_t p6CountSnapshot = 0;

uint32_t p1CountBuffer[AVGLEN];
uint32_t p2CountBuffer[AVGLEN];
uint32_t p3CountBuffer[AVGLEN];
uint32_t p4CountBuffer[AVGLEN];
uint32_t p5CountBuffer[AVGLEN];
uint32_t p6CountBuffer[AVGLEN];

unsigned int p1CountAverage;
unsigned int p2CountAverage;
unsigned int p3CountAverage;
unsigned int p4CountAverage;
unsigned int p5CountAverage;
unsigned int p6CountAverage;

/* USER CODE END PD */

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

/* USER CODE END PM */

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

UART_HandleTypeDef huart1;

/* USER CODE BEGIN PV */

/* 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_USART1_UART_Init(void);
/* USER CODE BEGIN PFP */
void process_adc_data(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();
  MX_USART1_UART_Init();
  /* USER CODE BEGIN 2 */
//  HAL_ADCEx_Calibration_Start(&hadc);
//  HAL_ADC_Start_DMA(&hadc, (uint32_t*)adc_buffer, ADC_BUFFER_SIZE);
  HAL_ADC_Start_DMA(&hadc, (uint32_t*)adc_buffer, ADC_BUFFER_SIZE);
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  for (i=0; i <= AVGLEN; i++) {
            p1CountBuffer[i] = 0;
            p2CountBuffer[i] = 0;
            p3CountBuffer[i] = 0;
            p4CountBuffer[i] = 0;
            p5CountBuffer[i] = 0;
            p6CountBuffer[i] = 0;
        }

  while (1)
  {
//	  process_adc_data();
    /* 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};

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI14|RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.HSI14State = RCC_HSI14_ON;
  RCC_OscInitStruct.HSI14CalibrationValue = 16;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL6;
  RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV1;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
  {
    Error_Handler();
  }
  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART1;
  PeriphClkInit.Usart1ClockSelection = RCC_USART1CLKSOURCE_PCLK1;
  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_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_PRESERVED;
  if (HAL_ADC_Init(&hadc) != HAL_OK)
  {
    Error_Handler();
  }

  /** Configure for the selected ADC regular channel to be converted.
  */
  sConfig.Channel = ADC_CHANNEL_0;
  sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;
  sConfig.SamplingTime = ADC_SAMPLETIME_55CYCLES_5;
  if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN ADC_Init 2 */

  /* USER CODE END ADC_Init 2 */

}

/**
  * @brief USART1 Initialization Function
  * @param None
  * @retval None
  */
static void MX_USART1_UART_Init(void)
{

  /* USER CODE BEGIN USART1_Init 0 */

  /* USER CODE END USART1_Init 0 */

  /* USER CODE BEGIN USART1_Init 1 */

  /* USER CODE END USART1_Init 1 */
  huart1.Instance = USART1;
  huart1.Init.BaudRate = 115200;
  huart1.Init.WordLength = UART_WORDLENGTH_8B;
  huart1.Init.StopBits = UART_STOPBITS_1;
  huart1.Init.Parity = UART_PARITY_NONE;
  huart1.Init.Mode = UART_MODE_TX_RX;
  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart1.Init.OverSampling = UART_OVERSAMPLING_16;
  huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
  huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
  if (HAL_UART_Init(&huart1) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN USART1_Init 2 */

  /* USER CODE END USART1_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};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOF_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_SET);

  /*Configure GPIO pin : PA5 */
  GPIO_InitStruct.Pin = GPIO_PIN_5;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}

/* USER CODE BEGIN 4 */
void  HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef *hadc) {

//	adcOutputBufferIndex += 1;
		adc_samples++;

//		if (adcOutputBufferIndex >= 8)
//			adcOutputBufferIndex = 0;

        adc_buffer[8] = 0;

		for (int i = 0; i < 8; i++)
			adc_buffer[8] += adc_buffer[i];

		adc_buffer[8] >>= 3; // Divide by 8 to get the average

		  if (adc_buffer[8] > p1_threshold)
			  p1Count++;
		  if (adc_buffer[8] > p2_threshold)
			  p2Count++;
		  if (adc_buffer[8] >= p3_threshold)
			  p3Count++;
		  if (adc_buffer[8] > p4_threshold)
			  p4Count++;
		  if (adc_buffer[8] > p5_threshold)
			  p5Count++;
		  if (adc_buffer[8] > p6_threshold)
			  p6Count++;

		  if (adc_samples >= 166000)
		  {
			  char uart_data[100];
			  adc_samples = 0; // Reset the sample count

			  p1CountSnapshot = p1Count;
			  p2CountSnapshot = p2Count;
			  p3CountSnapshot = p3Count;
			  p4CountSnapshot = p4Count;
			  p5CountSnapshot = p5Count;
			  p6CountSnapshot = p6Count;

			  p1Count = 0;
			  p2Count = 0;
			  p3Count = 0;
			  p4Count = 0;
			  p5Count = 0;
			  p6Count = 0;

				  p1CountBuffer[p1CountBufferIndex++] = p1CountSnapshot;
				  p2CountBuffer[p2CountBufferIndex++] = p2CountSnapshot;
				  p3CountBuffer[p3CountBufferIndex++] = p3CountSnapshot;
				  p4CountBuffer[p4CountBufferIndex++] = p4CountSnapshot;
				  p5CountBuffer[p5CountBufferIndex++] = p5CountSnapshot;
				  p6CountBuffer[p6CountBufferIndex++] = p6CountSnapshot;

				  if (p1CountBufferIndex >= AVGLEN )
					  p1CountBufferIndex = 0;

				  if (p2CountBufferIndex >= AVGLEN )
					  p2CountBufferIndex = 0;

				  if (p3CountBufferIndex >= AVGLEN )
					  p3CountBufferIndex = 0;

				  if (p4CountBufferIndex >= AVGLEN )
					  p4CountBufferIndex = 0;

				  if (p5CountBufferIndex >= AVGLEN )
					  p5CountBufferIndex = 0;

				  if (p6CountBufferIndex >= AVGLEN )
					  p6CountBufferIndex = 0;

				  p1CountAverage = 0;
				  p2CountAverage = 0;
				  p3CountAverage = 0;
				  p4CountAverage = 0;
				  p5CountAverage = 0;
				  p6CountAverage = 0;


				  for (i = 0; i < AVGLEN; i++)
				  {
					  p1CountAverage += p1CountBuffer[i];
					  p2CountAverage += p2CountBuffer[i];
					  p3CountAverage += p3CountBuffer[i];
					  p4CountAverage += p4CountBuffer[i];
					  p5CountAverage += p5CountBuffer[i];
					  p6CountAverage += p6CountBuffer[i];

				  }

				  // Calculate P1 and P2 concentrations (before adjustment)
				  p1PcsPerCc = p1CountAverage/(float)AVGLEN;
				  p2PcsPerCc = p2CountAverage/(float)AVGLEN;
				  p3PcsPerCc = p3CountAverage/(float)AVGLEN;
				  p4PcsPerCc = p4CountAverage/(float)AVGLEN;
				  p5PcsPerCc = p5CountAverage/(float)AVGLEN;
				  p6PcsPerCc = p6CountAverage/(float)AVGLEN;

				  sprintf(uart_data, "PQ_1p0: %d\r\nPQ_2p5: %d\r\nPQ_5p0: %d\r\nPQ_10p0: %d\r\n",
				  			    					(int)p3PcsPerCc,
				  			    					(int)p4PcsPerCc, (int)p5PcsPerCc, (int)p6PcsPerCc);

				  HAL_UART_Transmit(&huart1, (uint8_t *)uart_data, strlen(uart_data), HAL_MAX_DELAY);
		  }
}
//void process_adc_data(void) {
//  // Process the ADC data, for example, calculate the average value:
//  uint32_t sum = 0;
//  adc_samples++;
//  char uart_data[100];
//  adc_buffer[8] = 0;
//  for (size_t i = 0; i < ADC_BUFFER_SIZE; i++) {
//	  adc_buffer[8] += adc_buffer[i];
//  }
//  adc_buffer[8] >>= 3;
////  sprintf(uart_data, "average: %d\r\n",average);
////  				  HAL_UART_Transmit(&huart1, (uint8_t *)uart_data, strlen(uart_data), HAL_MAX_DELAY);
//  if (adc_buffer[8] > p1_threshold)
//  		  p1Count++;
//  	  if (adc_buffer[8] > p2_threshold)
//  		  p2Count++;
//  	  if (adc_buffer[8] >= p3_threshold)
//  		  p3Count++;
//  	  if (adc_buffer[8] > p4_threshold)
//  		  p4Count++;
//  	  if (adc_buffer[8] > p5_threshold)
//  		  p5Count++;
//  	  if (adc_buffer[8] > p6_threshold)
//  		  p6Count++;
//
// 	  if(adc_samples >= 166000)
// 	  {
// 		 adc_samples = 0; // Reset the sample count
// 		p1CountSnapshot = p1Count;
// 				  p2CountSnapshot = p2Count;
// 				  p3CountSnapshot = p3Count;
// 				  p4CountSnapshot = p4Count;
// 				  p5CountSnapshot = p5Count;
// 				  p6CountSnapshot = p6Count;
//
// 				  p1Count = 0;
// 				  p2Count = 0;
// 				  p3Count = 0;
// 				  p4Count = 0;
// 				  p5Count = 0;
// 				  p6Count = 0;
//
// 					  p1CountBuffer[p1CountBufferIndex++] = p1CountSnapshot;
// 					  p2CountBuffer[p2CountBufferIndex++] = p2CountSnapshot;
// 					  p3CountBuffer[p3CountBufferIndex++] = p3CountSnapshot;
// 					  p4CountBuffer[p4CountBufferIndex++] = p4CountSnapshot;
// 					  p5CountBuffer[p5CountBufferIndex++] = p5CountSnapshot;
// 					  p6CountBuffer[p6CountBufferIndex++] = p6CountSnapshot;
//
// 					  if (p1CountBufferIndex >= AVGLEN )
// 						  p1CountBufferIndex = 0;
//
// 					  if (p2CountBufferIndex >= AVGLEN )
// 						  p2CountBufferIndex = 0;
//
// 					  if (p3CountBufferIndex >= AVGLEN )
// 						  p3CountBufferIndex = 0;
//
// 					  if (p4CountBufferIndex >= AVGLEN )
// 						  p4CountBufferIndex = 0;
//
// 					  if (p5CountBufferIndex >= AVGLEN )
// 						  p5CountBufferIndex = 0;
//
// 					  if (p6CountBufferIndex >= AVGLEN )
// 						  p6CountBufferIndex = 0;
//
// 					  p1CountAverage = 0;
// 					  p2CountAverage = 0;
// 					  p3CountAverage = 0;
// 					  p4CountAverage = 0;
// 					  p5CountAverage = 0;
// 					  p6CountAverage = 0;
//
//
// 					  for (i = 0; i < AVGLEN; i++)
// 					  {
// 						  p1CountAverage += p1CountBuffer[i];
// 						  p2CountAverage += p2CountBuffer[i];
// 						  p3CountAverage += p3CountBuffer[i];
// 						  p4CountAverage += p4CountBuffer[i];
// 						  p5CountAverage += p5CountBuffer[i];
// 						  p6CountAverage += p6CountBuffer[i];
//
// 					  }
//
// 					  // Calculate P1 and P2 concentrations (before adjustment)
// 					  p1PcsPerCc = p1CountAverage/(float)AVGLEN;
// 					  p2PcsPerCc = p2CountAverage/(float)AVGLEN;
// 					  p3PcsPerCc = p3CountAverage/(float)AVGLEN;
// 					  p4PcsPerCc = p4CountAverage/(float)AVGLEN;
// 					  p5PcsPerCc = p5CountAverage/(float)AVGLEN;
// 					  p6PcsPerCc = p6CountAverage/(float)AVGLEN;
//
// 					  sprintf(uart_data, "PQ_1p0: %d\r\nPQ_2p5: %d\r\nPQ_5p0: %d\r\nPQ_10p0: %d\r\n",
// 					  			    					(int)p3PcsPerCc,
// 					  			    					(int)p4PcsPerCc, (int)p5PcsPerCc, (int)p6PcsPerCc);
//
// 					  HAL_UART_Transmit(&huart1, (uint8_t *)uart_data, strlen(uart_data), HAL_MAX_DELAY);
// 	  }
////yu may want to transfer the reading to the serial port
//}
/* 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 */
  __disable_irq();
  while (1)
  {
  }
  /* 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) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */