/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @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.
  *
  ******************************************************************************
  */
/* 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 BUFFER_SIZE 128
uint16_t DAC_Buffer[BUFFER_SIZE * 2];
uint16_t ADC_Buffer[BUFFER_SIZE * 2];

/* USER CODE END PD */

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

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/
ADC_HandleTypeDef hadc1;
DMA_HandleTypeDef hdma_adc1;

DAC_HandleTypeDef hdac;
DMA_HandleTypeDef hdma_dac1;

TIM_HandleTypeDef htim3;
TIM_HandleTypeDef htim4;

UART_HandleTypeDef huart2;

/* USER CODE BEGIN PV */
float f_x0, f_x1, f_x2, f_y0, f_y1, f_y2;
float s_x0, s_x1, s_x2, s_y0, s_y1, s_y2;

//Butterworth BPF
//Sampling Frequency =   84000.0
//cutoff1 =    700.00
//cutoff2 =   1500.00
//Order = 2nd
//**** 1st biquad ****
float f_a0 =   0.02914395804;
float f_a1 =   0.00000000000;
float f_a2 =  -0.02914395804;
float f_b1 =  -1.93734879471;
float f_b2 =   0.94741427185;
//**** 2nd biquad ****
float s_a0 =   0.02953008512;
float s_a1 =   0.00000000000;
float s_a2 =  -0.02953008512;
float s_b1 =  -1.96647338791;
float s_b2 =   0.96975874162;

/*
//Butterworth BRF
//Sampling Frequency =   84000.0
//cutoff1 =    700.00
//cutoff2 =   1500.00
//Order = 2nd
//**** 1st biquad ****
float f_a0 =   0.97269598302;
float f_a1 =  -1.93967869859;
float f_a2 =   0.97269598302;
float f_b1 =  -1.93750923572;
float f_b2 =   0.94756142890;
//**** 2nd biquad ****
float s_a0 =   0.98552608839;
float s_a1 =  -1.96526354989;
float s_a2 =   0.98552608839;
float s_b1 =  -1.96651285050;
float s_b2 =   0.96980287616;
*/

#define TAPN 90
int PTR = 0;

float dly[TAPN];
/*
float coeff[TAPN] = {
		//Remez Algorithm LPF
		//Sampling Frequency =    84000.0
		//cutoff1 =     3000.00
		//cutoff2 =     5000.00
		//Tap Count = 90
		//attenuate =   -50.00
		//ripple factor =    0.1000000
		  0.00325013180,
		 -0.00046448222,
		 -0.00074332397,
		 -0.00117465849,
		 -0.00170654447,
		 -0.00226911466,
		 -0.00278771533,
		 -0.00317666985,
		 -0.00335773116,
		 -0.00325875060,
		 -0.00283159155,
		 -0.00205189876,
		 -0.00093576590,
		  0.00046673674,
		  0.00205650568,
		  0.00370879306,
		  0.00525519810,
		  0.00653384753,
		  0.00736975286,
		  0.00759201030,
		  0.00709270280,
		  0.00579632010,
		  0.00370668366,
		  0.00089906271,
		 -0.00246622197,
		 -0.00615191770,
		 -0.00985147037,
		 -0.01321012001,
		 -0.01584498951,
		 -0.01737732205,
		 -0.01745872050,
		 -0.01580622606,
		 -0.01222861285,
		 -0.00664938042,
		  0.00087194816,
		  0.01014754996,
		  0.02085067436,
		  0.03253610436,
		  0.04466858358,
		  0.05664595033,
		  0.06784845692,
		  0.07767183304,
		  0.08557183732,
		  0.09110364496,
		  0.09395111741,
		  0.09395111741,
		  0.09110364496,
		  0.08557183732,
		  0.07767183304,
		  0.06784845692,
		  0.05664595033,
		  0.04466858358,
		  0.03253610436,
		  0.02085067436,
		  0.01014754996,
		  0.00087194816,
		 -0.00664938042,
		 -0.01222861285,
		 -0.01580622606,
		 -0.01745872050,
		 -0.01737732205,
		 -0.01584498951,
		 -0.01321012001,
		 -0.00985147037,
		 -0.00615191770,
		 -0.00246622197,
		  0.00089906271,
		  0.00370668366,
		  0.00579632010,
		  0.00709270280,
		  0.00759201030,
		  0.00736975286,
		  0.00653384753,
		  0.00525519810,
		  0.00370879306,
		  0.00205650568,
		  0.00046673674,
		 -0.00093576590,
		 -0.00205189876,
		 -0.00283159155,
		 -0.00325875060,
		 -0.00335773116,
		 -0.00317666985,
		 -0.00278771533,
		 -0.00226911466,
		 -0.00170654447,
		 -0.00117465849,
		 -0.00074332397,
		 -0.00046448222,
		  0.00325013180
};
*/
/*
float coeff[TAPN] = {
//Remez Algorithm HPF
//Sampling Frequency =    84000.0
//cutoff1 =     3000.00
//cutoff2 =     5000.00
//Tap Count = 90
//attenuate =   -50.00
//ripple factor =    0.1000000
 -0.00584456983,
 -0.00016337801,
  0.00014802291,
  0.00064471380,
  0.00128171382,
  0.00198936785,
  0.00268077258,
  0.00325471660,
  0.00361650630,
  0.00367058772,
  0.00335315212,
  0.00262550518,
  0.00149848997,
  0.00002241010,
 -0.00169761967,
 -0.00351821164,
 -0.00525823211,
 -0.00672081709,
 -0.00770403708,
 -0.00802865120,
 -0.00755439210,
 -0.00620502146,
 -0.00397839385,
 -0.00096814928,
  0.00264488917,
  0.00658353844,
  0.01051080794,
  0.01401339813,
  0.01668196280,
  0.01809396001,
  0.01788843995,
  0.01575019290,
  0.01151438434,
  0.00514460347,
 -0.00327920004,
 -0.01348465888,
 -0.02508261532,
 -0.03754336042,
 -0.05025879442,
 -0.06255543900,
 -0.07376130260,
 -0.08323907461,
 -0.09044060725,
 -0.09493998135,
  0.90352964717,
 -0.09493998135,
 -0.09044060725,
 -0.08323907461,
 -0.07376130260,
 -0.06255543900,
 -0.05025879442,
 -0.03754336042,
 -0.02508261532,
 -0.01348465888,
 -0.00327920004,
  0.00514460347,
  0.01151438434,
  0.01575019290,
  0.01788843995,
  0.01809396001,
  0.01668196280,
  0.01401339813,
  0.01051080794,
  0.00658353844,
  0.00264488917,
 -0.00096814928,
 -0.00397839385,
 -0.00620502146,
 -0.00755439210,
 -0.00802865120,
 -0.00770403708,
 -0.00672081709,
 -0.00525823211,
 -0.00351821164,
 -0.00169761967,
  0.00002241010,
  0.00149848997,
  0.00262550518,
  0.00335315212,
  0.00367058772,
  0.00361650630,
  0.00325471660,
  0.00268077258,
  0.00198936785,
  0.00128171382,
  0.00064471380,
  0.00014802291,
 -0.00016337801,
 -0.00584456983,
  0.00000000000
  };
*/
/*
float coeff[TAPN] = {
		//Remez Algorithm BPF
		//Sampling Frequency =    84000.0
		//cutoff1 =     3000.00
		//cutoff2 =     5000.00
		//cutoff3 =     7000.00
		//cutoff4 =     9000.00
		//Tap Count = 90
		//attenuate =   -50.00
		//ripple factor =    0.1000000
		 -0.00205774706,
		  0.00211368489,
		 -0.00013413854,
		 -0.00147947552,
		 -0.00186369379,
		 -0.00130857446,
		  0.00011793845,
		  0.00221413522,
		  0.00455366208,
		  0.00650573941,
		  0.00736256818,
		  0.00658527263,
		  0.00403130036,
		  0.00009993239,
		 -0.00431754986,
		 -0.00805927882,
		 -0.01006840711,
		 -0.00976457930,
		 -0.00730895706,
		 -0.00360328513,
		 -0.00003007313,
		  0.00204709103,
		  0.00181749739,
		 -0.00055244667,
		 -0.00384596144,
		 -0.00609329622,
		 -0.00525987047,
		 -0.00003398833,
		  0.00942395288,
		  0.02121909897,
		  0.03197196922,
		  0.03765111677,
		  0.03484278588,
		  0.02195137870,
		  0.00008456611,
		 -0.02679564639,
		 -0.05261502809,
		 -0.07062258317,
		 -0.07520708490,
		 -0.06359283657,
		 -0.03687469905,
		 -0.00004620669,
		  0.03905129750,
		  0.07160621364,
		  0.09005910356,
		  0.09005910356,
		  0.07160621364,
		  0.03905129750,
		 -0.00004620669,
		 -0.03687469905,
		 -0.06359283657,
		 -0.07520708490,
		 -0.07062258317,
		 -0.05261502809,
		 -0.02679564639,
		  0.00008456611,
		  0.02195137870,
		  0.03484278588,
		  0.03765111677,
		  0.03197196922,
		  0.02121909897,
		  0.00942395288,
		 -0.00003398833,
		 -0.00525987047,
		 -0.00609329622,
		 -0.00384596144,
		 -0.00055244667,
		  0.00181749739,
		  0.00204709103,
		 -0.00003007313,
		 -0.00360328513,
		 -0.00730895706,
		 -0.00976457930,
		 -0.01006840711,
		 -0.00805927882,
		 -0.00431754986,
		  0.00009993239,
		  0.00403130036,
		  0.00658527263,
		  0.00736256818,
		  0.00650573941,
		  0.00455366208,
		  0.00221413522,
		  0.00011793845,
		 -0.00130857446,
		 -0.00186369379,
		 -0.00147947552,
		 -0.00013413854,
		  0.00211368489,
		 -0.00205774706
};
*/

float coeff[TAPN] = {
		//Remez Algorithm BRF
		//Sampling Frequency =    84000.0
		//cutoff1 =     3000.00
		//cutoff2 =     5000.00
		//cutoff3 =     7000.00
		//cutoff4 =     9000.00
		//Tap Count = 90
		//attenuate =   -50.00
		//ripple factor =    0.1000000
		  0.00299366997,
		 -0.00643859061,
		 -0.00200425616,
		 -0.00015664335,
		  0.00049641514,
		  0.00033455962,
		 -0.00059990393,
		 -0.00219558590,
		 -0.00409367237,
		 -0.00565153765,
		 -0.00614174393,
		 -0.00498329537,
		 -0.00205026700,
		  0.00219663283,
		  0.00675596126,
		  0.01034839812,
		  0.01184191684,
		  0.01068539655,
		  0.00716386420,
		  0.00238655814,
		 -0.00204875142,
		 -0.00462554184,
		 -0.00453404618,
		 -0.00206511015,
		  0.00133242620,
		  0.00348661721,
		  0.00228637722,
		 -0.00339503310,
		 -0.01302265452,
		 -0.02420037583,
		 -0.03314284560,
		 -0.03572701985,
		 -0.02886897302,
		 -0.01180847479,
		  0.01317236960,
		  0.04095499834,
		  0.06465784314,
		  0.07741470262,
		  0.07435546935,
		  0.05427778497,
		  0.02023555760,
		 -0.02086198396,
		 -0.05986781855,
		 -0.08774230907,
		  0.90216612433,
		 -0.08774230907,
		 -0.05986781855,
		 -0.02086198396,
		  0.02023555760,
		  0.05427778497,
		  0.07435546935,
		  0.07741470262,
		  0.06465784314,
		  0.04095499834,
		  0.01317236960,
		 -0.01180847479,
		 -0.02886897302,
		 -0.03572701985,
		 -0.03314284560,
		 -0.02420037583,
		 -0.01302265452,
		 -0.00339503310,
		  0.00228637722,
		  0.00348661721,
		  0.00133242620,
		 -0.00206511015,
		 -0.00453404618,
		 -0.00462554184,
		 -0.00204875142,
		  0.00238655814,
		  0.00716386420,
		  0.01068539655,
		  0.01184191684,
		  0.01034839812,
		  0.00675596126,
		  0.00219663283,
		 -0.00205026700,
		 -0.00498329537,
		 -0.00614174393,
		 -0.00565153765,
		 -0.00409367237,
		 -0.00219558590,
		 -0.00059990393,
		  0.00033455962,
		  0.00049641514,
		 -0.00015664335,
		 -0.00200425616,
		 -0.00643859061,
		  0.00299366997,
		  0.00000000000
};

/* 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_ADC1_Init(void);
static void MX_DAC_Init(void);
static void MX_TIM3_Init(void);
static void MX_TIM4_Init(void);
static void MX_USART2_UART_Init(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
void SignalProcIIR(int odd) {
    for(int i = 0; i < BUFFER_SIZE; i++) {
        f_x2 = f_x1;
        f_x1 = f_x0;
        f_x0 = (float)(ADC_Buffer[odd * BUFFER_SIZE + i] - 2048);
        f_y2 = f_y1;
        f_y1 = f_y0;
        f_y0 = f_a0*f_x0 + f_a1*f_x1 + f_a2*f_x2 - f_b1*f_y1 - f_b2*f_y2;

        s_x2 = s_x1;
        s_x1 = s_x0;
        s_x0 = f_y0; // only this is f_
        s_y2 = s_y1;
        s_y1 = s_y0;
        s_y0 = s_a0*s_x0 + s_a1*s_x1 + s_a2*s_x2 - s_b1*s_y1 - s_b2*s_y2;

        DAC_Buffer[odd * BUFFER_SIZE + i] = (uint16_t)(s_y0 + 2048);
    }

}

void SignalProcFIR(int odd) {
	float acc;
	int i, n;

    for(i = 0; i < BUFFER_SIZE; i++) {
      dly[PTR] = (float)(ADC_Buffer[odd * BUFFER_SIZE + i] - 2048);

      acc = 0.0;
      for(n = 0; n < TAPN-(PTR+1); n++) {
        acc += (coeff[n] * dly[n+(PTR+1)]);
      }
      for(n = TAPN-(PTR+1); n < TAPN; n++) {
        acc += (coeff[n] * dly[n+(PTR+1)-TAPN]);
      }
      f_y0 = acc;

      if(PTR == TAPN-1) PTR = 0;
      else PTR++;

      DAC_Buffer[odd * BUFFER_SIZE + i] = (uint16_t)(f_y0 + 2048);
    }
}

void HAL_ADC_ConvHalfCpltCallback(ADC_HandleTypeDef* hadc)
{
  if (hadc->Instance == ADC1) {
	  SignalProcFIR(0);
    HAL_GPIO_TogglePin(LD2_GPIO_Port,LD2_Pin);
  }
}

void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
{
  if (hadc->Instance == ADC1) {
	  SignalProcFIR(1);
     HAL_GPIO_TogglePin(LD2_GPIO_Port,LD2_Pin);
  }
}
/* 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_ADC1_Init();
  MX_DAC_Init();
  MX_TIM3_Init();
  MX_TIM4_Init();
  MX_USART2_UART_Init();
  /* USER CODE BEGIN 2 */
  // Start DMA transfer for ADC
  HAL_ADC_Start_DMA(&hadc1, (uint32_t*)ADC_Buffer, BUFFER_SIZE * 2);

  // Start DMA transfer for DAC
  HAL_DAC_Start_DMA(&hdac, DAC_CHANNEL_1, (uint32_t*)DAC_Buffer, BUFFER_SIZE * 2, DAC_ALIGN_12B_R);

  // Start Timer4 for trigger for DAC
  HAL_TIM_Base_Start(&htim4);

  /* USER CODE END 2 */

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

  /** Configure the main internal regulator output voltage
  */
  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE3);

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  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.PLLM = 16;
  RCC_OscInitStruct.PLL.PLLN = 336;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
  RCC_OscInitStruct.PLL.PLLQ = 2;
  RCC_OscInitStruct.PLL.PLLR = 2;
  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_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

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

/**
  * @brief ADC1 Initialization Function
  * @param None
  * @retval None
  */
static void MX_ADC1_Init(void)
{

  /* USER CODE BEGIN ADC1_Init 0 */

  /* USER CODE END ADC1_Init 0 */

  ADC_ChannelConfTypeDef sConfig = {0};

  /* USER CODE BEGIN ADC1_Init 1 */

  /* USER CODE END ADC1_Init 1 */

  /** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
  */
  hadc1.Instance = ADC1;
  hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4;
  hadc1.Init.Resolution = ADC_RESOLUTION_12B;
  hadc1.Init.ScanConvMode = DISABLE;
  hadc1.Init.ContinuousConvMode = DISABLE;
  hadc1.Init.DiscontinuousConvMode = DISABLE;
  hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_RISING;
  hadc1.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T3_TRGO;
  hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc1.Init.NbrOfConversion = 1;
  hadc1.Init.DMAContinuousRequests = ENABLE;
  hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
  if (HAL_ADC_Init(&hadc1) != 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_6;
  sConfig.Rank = 1;
  sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN ADC1_Init 2 */

  /* USER CODE END ADC1_Init 2 */

}

/**
  * @brief DAC Initialization Function
  * @param None
  * @retval None
  */
static void MX_DAC_Init(void)
{

  /* USER CODE BEGIN DAC_Init 0 */

  /* USER CODE END DAC_Init 0 */

  DAC_ChannelConfTypeDef sConfig = {0};

  /* USER CODE BEGIN DAC_Init 1 */

  /* USER CODE END DAC_Init 1 */

  /** DAC Initialization
  */
  hdac.Instance = DAC;
  if (HAL_DAC_Init(&hdac) != HAL_OK)
  {
    Error_Handler();
  }

  /** DAC channel OUT1 config
  */
  sConfig.DAC_Trigger = DAC_TRIGGER_T4_TRGO;
  sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
  if (HAL_DAC_ConfigChannel(&hdac, &sConfig, DAC_CHANNEL_1) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN DAC_Init 2 */

  /* USER CODE END DAC_Init 2 */

}

/**
  * @brief TIM3 Initialization Function
  * @param None
  * @retval None
  */
static void MX_TIM3_Init(void)
{

  /* USER CODE BEGIN TIM3_Init 0 */

  /* USER CODE END TIM3_Init 0 */

  TIM_ClockConfigTypeDef sClockSourceConfig = {0};
  TIM_SlaveConfigTypeDef sSlaveConfig = {0};
  TIM_MasterConfigTypeDef sMasterConfig = {0};

  /* USER CODE BEGIN TIM3_Init 1 */

  /* USER CODE END TIM3_Init 1 */
  htim3.Instance = TIM3;
  htim3.Init.Prescaler = 0;
  htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim3.Init.Period = 1000-1;
  htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  htim3.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
  if (HAL_TIM_Base_Init(&htim3) != HAL_OK)
  {
    Error_Handler();
  }
  sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
  if (HAL_TIM_ConfigClockSource(&htim3, &sClockSourceConfig) != HAL_OK)
  {
    Error_Handler();
  }
  sSlaveConfig.SlaveMode = TIM_SLAVEMODE_TRIGGER;
  sSlaveConfig.InputTrigger = TIM_TS_ITR3;
  if (HAL_TIM_SlaveConfigSynchro(&htim3, &sSlaveConfig) != HAL_OK)
  {
    Error_Handler();
  }
  sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  if (HAL_TIMEx_MasterConfigSynchronization(&htim3, &sMasterConfig) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN TIM3_Init 2 */

  /* USER CODE END TIM3_Init 2 */

}

/**
  * @brief TIM4 Initialization Function
  * @param None
  * @retval None
  */
static void MX_TIM4_Init(void)
{

  /* USER CODE BEGIN TIM4_Init 0 */

  /* USER CODE END TIM4_Init 0 */

  TIM_ClockConfigTypeDef sClockSourceConfig = {0};
  TIM_MasterConfigTypeDef sMasterConfig = {0};

  /* USER CODE BEGIN TIM4_Init 1 */

  /* USER CODE END TIM4_Init 1 */
  htim4.Instance = TIM4;
  htim4.Init.Prescaler = 0;
  htim4.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim4.Init.Period = 1000-1;
  htim4.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  htim4.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
  if (HAL_TIM_Base_Init(&htim4) != HAL_OK)
  {
    Error_Handler();
  }
  sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
  if (HAL_TIM_ConfigClockSource(&htim4, &sClockSourceConfig) != HAL_OK)
  {
    Error_Handler();
  }
  sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  if (HAL_TIMEx_MasterConfigSynchronization(&htim4, &sMasterConfig) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN TIM4_Init 2 */

  /* USER CODE END TIM4_Init 2 */

}

/**
  * @brief USART2 Initialization Function
  * @param None
  * @retval None
  */
static void MX_USART2_UART_Init(void)
{

  /* USER CODE BEGIN USART2_Init 0 */

  /* USER CODE END USART2_Init 0 */

  /* USER CODE BEGIN USART2_Init 1 */

  /* USER CODE END USART2_Init 1 */
  huart2.Instance = USART2;
  huart2.Init.BaudRate = 115200;
  huart2.Init.WordLength = UART_WORDLENGTH_8B;
  huart2.Init.StopBits = UART_STOPBITS_1;
  huart2.Init.Parity = UART_PARITY_NONE;
  huart2.Init.Mode = UART_MODE_TX_RX;
  huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart2.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart2) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN USART2_Init 2 */

  /* USER CODE END USART2_Init 2 */

}

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

  /* DMA controller clock enable */
  __HAL_RCC_DMA2_CLK_ENABLE();
  __HAL_RCC_DMA1_CLK_ENABLE();

  /* DMA interrupt init */
  /* DMA1_Stream5_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Stream5_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Stream5_IRQn);
  /* DMA2_Stream0_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA2_Stream0_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA2_Stream0_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_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOH_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(LD2_GPIO_Port, LD2_Pin, GPIO_PIN_RESET);

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

  /*Configure GPIO pin : LD2_Pin */
  GPIO_InitStruct.Pin = LD2_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(LD2_GPIO_Port, &GPIO_InitStruct);

  /* USER CODE BEGIN MX_GPIO_Init_2 */

  /* USER CODE END MX_GPIO_Init_2 */
}

/* 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 */
  __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 */