/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2023 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"
#include <stdio.h>
#include <string.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 DMX_FRAME_SIZE 513
#define DMX_BREAK_TIME_US  88
#define DMX_MARK_AFTER_BREAK_TIME_US 8
#define DMX_BIT_TIME_US 4
#define MIN_INTER_FRAME_TIME 176
/* USER CODE END PD */

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

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

RTC_HandleTypeDef hrtc;

TIM_HandleTypeDef htim2;

UART_HandleTypeDef huart5;
UART_HandleTypeDef huart1;

/* USER CODE BEGIN PV */

//receive Buffer
uint8_t dmx_data[DMX_FRAME_SIZE];
char buffer[50];
uint32_t last_frame_time = 0;
// DMX512 receive state
enum {
    DMX_STATE_BREAK,
    DMX_STATE_START,
    DMX_STATE_DATA,
    DMX_STATE_IDLE
} dmx_state = DMX_STATE_IDLE;

// DMX512 receive address
#define DMX_ADDRESS 1

// DMX512 receive flag
volatile uint8_t dmx_received = 0;
/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_UART5_Init(void);
static void MX_USART1_UART_Init(void);
static void MX_TIM2_Init(void);
static void MX_RTC_Init(void);
/* USER CODE BEGIN PFP */
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart);
/* 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_UART5_Init();
  MX_USART1_UART_Init();
  MX_TIM2_Init();
  MX_RTC_Init();
  /* USER CODE BEGIN 2 */
  HAL_UART_Transmit(&huart1, "MAINBOARD_DMX_TEST_V_0_3\r\n",28	,1000);

    HAL_GPIO_WritePin(GPIOE, GPIO_PIN_11, GPIO_PIN_RESET);		// /D/E_IN_TX	(U2 Driver disable)
    HAL_UART_Transmit(&huart1, "PIN 64 High: /D/E_IN_TX\r\n",25	,1000);
    HAL_GPIO_WritePin(GPIOE, GPIO_PIN_12, GPIO_PIN_RESET);		// RE_IN_RX		(U2 Receiver enable)
    HAL_UART_Transmit(&huart1, "PIN 65 High: RE_IN_RX\r\n",23	,1000);
    HAL_GPIO_WritePin(GPIOD, GPIO_PIN_10, GPIO_PIN_SET);		// Source: DMX-Cable
    HAL_UART_Transmit(&huart1, "PIN 79 High: Source_select\r\n",28	,1000);


    // Start DMX512 reception
        HAL_UART_Receive_IT(&huart5, dmx_data, DMX_FRAME_SIZE);


  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
	  // Check if DMX512 data has been received
	          if (dmx_received)
	          {
	              // Reset DMX512 receive flag
	              dmx_received = 0;

	              // Check DMX512 address
	              if (dmx_data[DMX_ADDRESS] != 0)
	              {
	                  // Display DMX512 value on UART1
	                  char buf[20];
	                  sprintf(buf, "DMX value: %d\r\n", dmx_data[DMX_ADDRESS]);
	                  HAL_UART_Transmit(&huart1, (uint8_t *)buf, strlen(buf), HAL_MAX_DELAY);
	              }
	          }


    /* 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 LSE Drive Capability
  */
  HAL_PWR_EnableBkUpAccess();
  __HAL_RCC_LSEDRIVE_CONFIG(RCC_LSEDRIVE_LOW);

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

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE|RCC_OSCILLATORTYPE_LSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.LSEState = RCC_LSE_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLM = 25;
  RCC_OscInitStruct.PLL.PLLN = 432;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = 9;	//9
  RCC_OscInitStruct.PLL.PLLR = 7;	//7
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  /** Activate the Over-Drive mode
  */
  if (HAL_PWREx_EnableOverDrive() != 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_DIV4;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_7) != HAL_OK)
  {
    Error_Handler();
  }
}

/**
  * @brief RTC Initialization Function
  * @param None
  * @retval None
  */
static void MX_RTC_Init(void)
{

  /* USER CODE BEGIN RTC_Init 0 */

  /* USER CODE END RTC_Init 0 */

  /* USER CODE BEGIN RTC_Init 1 */

  /* USER CODE END RTC_Init 1 */

  /** Initialize RTC Only
  */
  hrtc.Instance = RTC;
  hrtc.Init.HourFormat = RTC_HOURFORMAT_24;
  hrtc.Init.AsynchPrediv = 127;
  hrtc.Init.SynchPrediv = 255;
  hrtc.Init.OutPut = RTC_OUTPUT_DISABLE;
  hrtc.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
  hrtc.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
  if (HAL_RTC_Init(&hrtc) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN RTC_Init 2 */

  /* USER CODE END RTC_Init 2 */

}

/**
  * @brief TIM2 Initialization Function
  * @param None
  * @retval None
  */
static void MX_TIM2_Init(void)
{

  /* USER CODE BEGIN TIM2_Init 0 */

  /* USER CODE END TIM2_Init 0 */

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

  /* USER CODE BEGIN TIM2_Init 1 */

  /* USER CODE END TIM2_Init 1 */
  htim2.Instance = TIM2;
  htim2.Init.Prescaler = 0;
  htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim2.Init.Period = 0xFFFFFFFF;
  htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
  if (HAL_TIM_Base_Init(&htim2) != HAL_OK)
  {
    Error_Handler();
  }
  sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_ETRMODE2;
  sClockSourceConfig.ClockPolarity = TIM_CLOCKPOLARITY_NONINVERTED;
  sClockSourceConfig.ClockPrescaler = TIM_CLOCKPRESCALER_DIV1;
  sClockSourceConfig.ClockFilter = 0;
  if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)
  {
    Error_Handler();
  }
  sSlaveConfig.SlaveMode = TIM_SLAVEMODE_DISABLE;
  sSlaveConfig.InputTrigger = TIM_TS_ITR0;
  if (HAL_TIM_SlaveConfigSynchro(&htim2, &sSlaveConfig) != HAL_OK)
  {
    Error_Handler();
  }
  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN TIM2_Init 2 */

  /* USER CODE END TIM2_Init 2 */

}

/**
  * @brief UART5 Initialization Function
  * @param None
  * @retval None
  */
static void MX_UART5_Init(void)
{

  /* USER CODE BEGIN UART5_Init 0 */

  /* USER CODE END UART5_Init 0 */

  /* USER CODE BEGIN UART5_Init 1 */

  /* USER CODE END UART5_Init 1 */
  huart5.Instance = UART5;
  huart5.Init.BaudRate = 250000;
  huart5.Init.WordLength = UART_WORDLENGTH_8B;
  huart5.Init.StopBits = UART_STOPBITS_2;
  huart5.Init.Parity = UART_PARITY_NONE;
  huart5.Init.Mode = UART_MODE_RX;
  huart5.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart5.Init.OverSampling = UART_OVERSAMPLING_16;
  huart5.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
  huart5.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_RXOVERRUNDISABLE_INIT;//UART_ADVFEATURE_RXOVERRUNDISABLE_INIT
  if (HAL_UART_Init(&huart5) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN UART5_Init 2 */
  huart5.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_RXOVERRUNDISABLE_INIT;//UART_ADVFEATURE_RXOVERRUNDISABLE_INIT
  // Enable UART5 interrupts
     HAL_NVIC_SetPriority(UART5_IRQn, 0, 0);
     HAL_NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);
     HAL_NVIC_EnableIRQ(UART5_IRQn);
  /* USER CODE END UART5_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 */

}

/**
  * @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_GPIOH_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();
  __HAL_RCC_GPIOE_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();
  __HAL_RCC_GPIOD_CLK_ENABLE();

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOE, GPIO_PIN_11|GPIO_PIN_12, GPIO_PIN_RESET);

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_10, GPIO_PIN_RESET);

  /*Configure GPIO pins : PE11 PE12 */
  GPIO_InitStruct.Pin = GPIO_PIN_11|GPIO_PIN_12;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);

  /*Configure GPIO pin : PD10 */
  GPIO_InitStruct.Pin = GPIO_PIN_10;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);

}

/* USER CODE BEGIN 4 */
/*
// DMX512 UART5 receive interrupt handler
void UART5_IRQHandlerX(void)
{
	//HAL_UART_Transmit(&huart1, "U5IRQ\r\n", 9, 100);
    uint32_t isrflags = READ_REG(huart5.Instance->ISR);
    uint32_t cr1its = READ_REG(huart5.Instance->CR1);

    // Debug message - print isrflags and cr1its
        char buf3[64];
        snprintf(buf3, 64, "UART5 ISR flags: 0x%08X, CR1: 0x%08X\r\n", isrflags, cr1its);
        HAL_UART_Transmit(&huart1, (uint8_t*)buf3, strlen(buf3), HAL_MAX_DELAY);

    // Check for DMX512 break and mark-after-break conditions
    if ((isrflags & USART_ISR_FE) != RESET)
    {

        // DMX512 break detected
    	//HAL_UART_Transmit(&huart1, "Break_detected\r\n", 16, 100);
        dmx_state = DMX_STATE_START;
        // Debug message
                char* message = "DMX512 break detected\r\n";
                HAL_UART_Transmit(&huart1, (uint8_t*)message, strlen(message), HAL_MAX_DELAY);
    }
    else if ((isrflags & USART_ISR_RXNE) != RESET && (dmx_state == DMX_STATE_START))
    {

        // DMX512 mark-after-break detected

        dmx_state = DMX_STATE_DATA;
        HAL_UART_AbortReceive_IT(&huart5);
        HAL_UART_Receive_IT(&huart5, dmx_data, DMX_FRAME_SIZE);

        // Debug message
                char* message = "DMX512 mark-after-break detected\r\n";
                HAL_UART_Transmit(&huart1, (uint8_t*)message, strlen(message), HAL_MAX_DELAY);
    }
    else if ((isrflags & USART_ISR_IDLE) != RESET)
    {
        // DMX512 frame received

        dmx_received = 1;
        dmx_state = DMX_STATE_IDLE;
        __HAL_UART_CLEAR_IDLEFLAG(&huart5);

        // Debug message
                char* message = "DMX512 frame received\r\n";
                HAL_UART_Transmit(&huart1, (uint8_t*)message, strlen(message), HAL_MAX_DELAY);

                // Debug message - print dmx_state
                       char buf[32];
                       snprintf(buf, 32, "dmx_state: %d\r\n", dmx_state);
                       HAL_UART_Transmit(&huart1, (uint8_t*)buf, strlen(buf), HAL_MAX_DELAY);
                       // Debug message - print dmx_data[DMX_ADDRESS]
                               char buf2[32];
                               snprintf(buf2, 32, "DMX512 data: %d\r\n", dmx_data[DMX_ADDRESS]);
                               HAL_UART_Transmit(&huart1, (uint8_t*)buf2, strlen(buf2), HAL_MAX_DELAY);
    }

    // DMX512 data reception
    // Debug message - print isrflags
        char buf[32];
        snprintf(buf, 32, "UART5 ISR flags: 0x%08X\r\n", isrflags);
        HAL_UART_Transmit(&huart1, (uint8_t*)buf, strlen(buf), HAL_MAX_DELAY);
        snprintf(buf, 32, "dmx_state: %d\r\n", dmx_state);
                               HAL_UART_Transmit(&huart1, (uint8_t*)buf, strlen(buf), HAL_MAX_DELAY);

    if ((isrflags & USART_ISR_RXNE) != RESET && (dmx_state == DMX_STATE_DATA))
    {
    	HAL_UART_Transmit(&huart1, "DataReception\r\n", 15, HAL_MAX_DELAY);

        uint16_t dmx_byte_index = (huart5.RxXferSize - huart5.RxXferCount);

        if (dmx_byte_index == 0)
        {
            // Check for valid DMX512 start code
            if (dmx_data[0] != 0)
            {
                // Invalid DMX512 start code, restart reception
                dmx_state = DMX_STATE_BREAK;
                HAL_UART_AbortReceive_IT(&huart5);
                HAL_UART_Receive_IT(&huart5, dmx_data, DMX_FRAME_SIZE);
            }
        }
        else
        {
            // Store DMX512 data byte in buffer
            dmx_data[dmx_byte_index] = READ_REG(huart5.Instance->RDR);

            // Check for end of DMX512 frame
            if (dmx_byte_index == DMX_FRAME_SIZE - 1)
            {
                // Set DMX512 state to idle
                dmx_state = DMX_STATE_IDLE;

                // Reset UART5 to receive the next DMX512 frame
                HAL_UART_AbortReceive_IT(&huart5);
                HAL_UART_Receive_IT(&huart5, dmx_data, DMX_FRAME_SIZE);
            }
        }
    }

    // Handle UART errors
    if ((isrflags & (USART_ISR_PE | USART_ISR_FE | USART_ISR_ORE | USART_ISR_NE)) != RESET)
    {
        // Error handling, restart reception
        dmx_state = DMX_STATE_BREAK;
        HAL_UART_AbortReceive_IT(&huart5);
        HAL_UART_Receive_IT(&huart5, dmx_data, DMX_FRAME_SIZE);
    }

    // Clear UART5 interrupt flags
    if ((isrflags & USART_ISR_PE) != RESET)
    {
        WRITE_REG(huart5.Instance->ICR, USART_ICR_PECF);
    }
    if ((isrflags & USART_ISR_FE) != RESET)
    {
        WRITE_REG(huart5.Instance->ICR, USART_ICR_FECF);
    }
    if ((isrflags & USART_ISR_ORE) != RESET)
    {
        WRITE_REG(huart5.Instance->ICR, USART_ICR_ORECF);
    }
    if ((isrflags & USART_ISR_NE) != RESET)
    {
        WRITE_REG(huart5.Instance->ICR, USART_ICR_NCF);
    }
    }

    // UART5 error interrupt handler
    void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart)
    {
        // Error handling, restart reception
        dmx_state = DMX_STATE_BREAK;
        HAL_UART_AbortReceive_IT(&huart5);
        HAL_UART_Receive_IT(&huart5, dmx_data, DMX_FRAME_SIZE);
    }

    // UART5 receive complete interrupt handler
    void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
    {
        // Error handling, restart reception
        dmx_state = DMX_STATE_BREAK;
        HAL_UART_AbortReceive_IT(&huart5);
        HAL_UART_Receive_IT(&huart5, dmx_data, DMX_FRAME_SIZE);
    }
*/

// DMX512 UART5 receive interrupt handler-Ansatz mit Timer zur MAB-detection
void UART5_IRQHandlerX(void)
{
	//HAL_UART_Transmit(&huart1, "U5IRQ\r\n", 9, 100);
    uint32_t isrflags = READ_REG(huart5.Instance->ISR);
    uint32_t cr1its = READ_REG(huart5.Instance->CR1);

    // Check for DMX512 break and mark-after-break conditions
    if ((isrflags & USART_ISR_FE) != RESET)
    {
        // DMX512 break detected
        dmx_state = DMX_STATE_START;
        // Debug message
                        char* message = "DMX512 break detected\r\n";
                        HAL_UART_Transmit(&huart1, (uint8_t*)message, strlen(message), HAL_MAX_DELAY);

        // Start timer to measure time since break
        __HAL_TIM_SET_COUNTER(&htim2, 0);
        HAL_TIM_Base_Start_IT(&htim2);
    }
    else if ((isrflags & USART_ISR_RXNE) != RESET && (dmx_state == DMX_STATE_BREAK))//Change DMX_STATE_START to DMX_STATE_BREAK for check
    {
        // DMX512 mark-after-break detected
    	// Debug message
    	                char* message = "DMX512 mark-after-break detected\r\n";
    	                HAL_UART_Transmit(&huart1, (uint8_t*)message, strlen(message), HAL_MAX_DELAY);
        dmx_state = DMX_STATE_DATA;
        HAL_TIM_Base_Stop_IT(&htim2);
        uint32_t time_since_break = __HAL_TIM_GET_COUNTER(&htim2);
        uint32_t bit_time = (SystemCoreClock / 250000) / 8;  // calculate bit time for 250 kbps baud rate
        uint32_t data_offset = (time_since_break - bit_time) / bit_time;

        // Check that the data offset is within range
        if (data_offset >= 0 && data_offset < DMX_FRAME_SIZE)
        {
        	HAL_UART_Transmit(&huart1, "Offset in Range\r\n", 17, 100);
            // Start receiving DMX512 data bytes
            HAL_UART_Receive_IT(&huart5, &dmx_data[data_offset], DMX_FRAME_SIZE - data_offset);
            // Wait for the data to be received
                        while (HAL_UART_GetState(&huart5) != HAL_UART_STATE_READY &&
                               HAL_UART_GetState(&huart5) != HAL_UART_STATE_BUSY_RX) {}
                        // Debug messages
                                   char* message1 = "HAL_UART_Receive_IT() called\r\n";
                                   HAL_UART_Transmit(&huart1, (uint8_t*)message1, strlen(message1), HAL_MAX_DELAY);
                                   char* message2 = "Data offset: %d\r\n";
                                   sprintf(buffer, message2, data_offset);
                                   HAL_UART_Transmit(&huart1, (uint8_t*)buffer, strlen(buffer), HAL_MAX_DELAY);

        }
        else
        {
        	HAL_UART_Transmit(&huart1, "Offset NOT in Range\r\n", 21, 100);
            // Invalid data offset, restart reception
            dmx_state = DMX_STATE_BREAK;
            HAL_UART_AbortReceive_IT(&huart5);
        }
    }
    else if ((isrflags & USART_ISR_IDLE) != RESET)
    {
        // DMX512 frame received
        dmx_received = 1;
        dmx_state = DMX_STATE_IDLE;
        __HAL_UART_CLEAR_IDLEFLAG(&huart5);

        // Debug message
        char* message = "DMX512 frame received\r\n";
        HAL_UART_Transmit(&huart1, (uint8_t*)message, strlen(message), HAL_MAX_DELAY);
        // Wait for minimum inter-frame time (176 microseconds)
                uint32_t frame_time = __HAL_TIM_GET_COUNTER(&htim2);
                uint32_t inter_frame_time = frame_time - last_frame_time;
                if (inter_frame_time < MIN_INTER_FRAME_TIME)
                {
                    HAL_Delay(MIN_INTER_FRAME_TIME - inter_frame_time);
                }
                last_frame_time = frame_time;

                // Reset timer for next frame
                __HAL_TIM_SET_COUNTER(&htim2, 0);
    }
}

// UART5 error interrupt handler
void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart)
{
    // Error handling, restart reception
    dmx_state = DMX_STATE_BREAK;
    HAL_UART_AbortReceive_IT(&huart5);
    HAL_UART_Receive_IT(&huart5, dmx_data, DMX_FRAME_SIZE);
}
// UART5 receive complete interrupt handler
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
    // Error handling, restart reception
    dmx_state = DMX_STATE_BREAK;
    HAL_UART_AbortReceive_IT(&huart5);
    HAL_UART_Receive_IT(&huart5, dmx_data, DMX_FRAME_SIZE);
}


// TIM2 update interrupt handler
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
    if (htim->Instance == TIM2)
    {
        // Stop timer and reset DMX512 state
        HAL_TIM_Base_Stop_IT(&htim2);
        dmx_state = DMX_STATE_BREAK;
        HAL_UART_AbortReceive_IT(&huart5);
    }
}
/* 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 */