1 | /* Private define ------------------------------------------------------------*/
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2 | /* USER CODE BEGIN PD */
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3 | #define DMX_FRAME_SIZE 513
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4 | #define DMX_BREAK_TIME_US 88
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5 | #define DMX_MARK_AFTER_BREAK_TIME_US 8
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6 | #define DMX_BIT_TIME_US 4
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7 | #define MIN_INTER_FRAME_TIME 176
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8 | /* USER CODE END PD */
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9 |
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10 | /* Private macro -------------------------------------------------------------*/
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11 | /* USER CODE BEGIN PM */
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12 |
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13 | /* USER CODE END PM */
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14 |
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15 | /* Private variables ---------------------------------------------------------*/
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16 |
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17 |
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18 |
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19 | TIM_HandleTypeDef htim2;
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20 |
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21 | UART_HandleTypeDef huart5;
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22 | UART_HandleTypeDef huart1;
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23 |
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24 | /* USER CODE BEGIN PV */
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25 |
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26 | //receive Buffer
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27 | uint8_t dmx_data[DMX_FRAME_SIZE];
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28 | char buffer[50];
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29 | uint32_t last_frame_time = 0;
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30 | // DMX512 receive state
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31 | enum {
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32 | DMX_STATE_BREAK,
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33 | DMX_STATE_START,
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34 | DMX_STATE_DATA,
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35 | DMX_STATE_IDLE
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36 | } dmx_state = DMX_STATE_IDLE;
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37 |
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38 | // DMX512 receive address
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39 | #define DMX_ADDRESS 1
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40 |
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41 | // DMX512 receive flag
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42 | volatile uint8_t dmx_received = 0;
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43 | /* USER CODE END PV */
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44 |
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45 | /* Private function prototypes -----------------------------------------------*/
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46 | void SystemClock_Config(void);
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47 | static void MX_GPIO_Init(void);
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48 | static void MX_UART5_Init(void);
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49 | static void MX_USART1_UART_Init(void);
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50 | static void MX_TIM2_Init(void);
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51 | static void MX_RTC_Init(void);
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52 | /* USER CODE BEGIN PFP */
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53 | void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart);
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54 | /* USER CODE END PFP */
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55 |
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56 | /* Private user code ---------------------------------------------------------*/
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57 | /* USER CODE BEGIN 0 */
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58 |
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59 | /* USER CODE END 0 */
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60 |
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61 | /**
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62 | * @brief The application entry point.
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63 | * @retval int
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64 | */
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65 | int main(void)
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66 | {
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67 | /* USER CODE BEGIN 1 */
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68 |
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69 | /* USER CODE END 1 */
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70 |
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71 | /* MCU Configuration--------------------------------------------------------*/
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72 |
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73 | /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
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74 | HAL_Init();
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75 |
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76 | /* USER CODE BEGIN Init */
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77 |
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78 | /* USER CODE END Init */
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79 |
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80 | /* Configure the system clock */
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81 | SystemClock_Config();
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82 |
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83 | /* USER CODE BEGIN SysInit */
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84 |
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85 | /* USER CODE END SysInit */
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86 |
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87 | /* Initialize all configured peripherals */
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88 | MX_GPIO_Init();
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89 | MX_UART5_Init();
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90 | MX_USART1_UART_Init();
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91 | MX_TIM2_Init();
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92 | MX_RTC_Init();
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93 | /* USER CODE BEGIN 2 */
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94 | HAL_UART_Transmit(&huart1, "MAINBOARD_DMX_TEST_V_0_3\r\n",28 ,1000);
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95 |
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96 | HAL_GPIO_WritePin(GPIOE, GPIO_PIN_11, GPIO_PIN_RESET); // /D/E_IN_TX (U2 Driver disable)
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97 |
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98 | HAL_GPIO_WritePin(GPIOE, GPIO_PIN_12, GPIO_PIN_RESET); // RE_IN_RX (U2 Receiver enable)
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99 |
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100 | HAL_GPIO_WritePin(GPIOD, GPIO_PIN_10, GPIO_PIN_SET); // Source: DMX-Cable
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101 |
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102 |
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103 |
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104 | // Start DMX512 reception
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105 | HAL_UART_Receive_IT(&huart5, dmx_data, DMX_FRAME_SIZE);
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106 |
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107 |
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108 | /* USER CODE END 2 */
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109 |
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110 | /* Infinite loop */
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111 | /* USER CODE BEGIN WHILE */
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112 | while (1)
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113 | {
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114 | // Check if DMX512 data has been received
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115 | if (dmx_received)
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116 | {
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117 | // Reset DMX512 receive flag
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118 | dmx_received = 0;
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119 |
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120 | // Check DMX512 address
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121 | if (dmx_data[DMX_ADDRESS] != 0)
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122 | {
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123 | // Display DMX512 value on UART1
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124 | char buf[20];
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125 | sprintf(buf, "DMX value: %d\r\n", dmx_data[DMX_ADDRESS]);
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126 | HAL_UART_Transmit(&huart1, (uint8_t *)buf, strlen(buf), HAL_MAX_DELAY);
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127 | }
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128 | }
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129 |
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130 |
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131 | /* USER CODE END WHILE */
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132 |
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133 |
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134 |
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135 |
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136 |
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137 |
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138 |
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139 |
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140 | /* USER CODE BEGIN 3 */
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141 | }
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142 | /* USER CODE END 3 */
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143 | }
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144 |
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145 | /**
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146 | * @brief System Clock Configuration
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147 | * @retval None
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148 | */
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149 | void SystemClock_Config(void)
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150 | {
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151 | RCC_OscInitTypeDef RCC_OscInitStruct = {0};
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152 | RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
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153 |
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154 | /** Configure LSE Drive Capability
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155 | */
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156 | HAL_PWR_EnableBkUpAccess();
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157 | __HAL_RCC_LSEDRIVE_CONFIG(RCC_LSEDRIVE_LOW);
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158 |
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159 | /** Configure the main internal regulator output voltage
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160 | */
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161 | __HAL_RCC_PWR_CLK_ENABLE();
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162 | __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
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163 |
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164 | /** Initializes the RCC Oscillators according to the specified parameters
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165 | * in the RCC_OscInitTypeDef structure.
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166 | */
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167 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE|RCC_OSCILLATORTYPE_LSE;
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168 | RCC_OscInitStruct.HSEState = RCC_HSE_ON;
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169 | RCC_OscInitStruct.LSEState = RCC_LSE_ON;
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170 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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171 | RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
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172 | RCC_OscInitStruct.PLL.PLLM = 25;
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173 | RCC_OscInitStruct.PLL.PLLN = 432;
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174 | RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
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175 | RCC_OscInitStruct.PLL.PLLQ = 9; //9
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176 | RCC_OscInitStruct.PLL.PLLR = 7; //7
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177 | if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
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178 | {
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179 | Error_Handler();
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180 | }
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181 |
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182 | /** Activate the Over-Drive mode
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183 | */
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184 | if (HAL_PWREx_EnableOverDrive() != HAL_OK)
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185 | {
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186 | Error_Handler();
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187 | }
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188 |
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189 | /** Initializes the CPU, AHB and APB buses clocks
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190 | */
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191 | RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
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192 | |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
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193 | RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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194 | RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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195 | RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
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196 | RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
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197 |
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198 | if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_7) != HAL_OK)
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199 | {
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200 | Error_Handler();
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201 | }
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202 | }
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203 |
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204 |
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205 |
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206 | /**
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207 | * @brief TIM2 Initialization Function
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208 | * @param None
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209 | * @retval None
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210 | */
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211 | static void MX_TIM2_Init(void)
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212 | {
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213 |
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214 | /* USER CODE BEGIN TIM2_Init 0 */
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215 |
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216 | /* USER CODE END TIM2_Init 0 */
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217 |
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218 | TIM_ClockConfigTypeDef sClockSourceConfig = {0};
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219 | TIM_SlaveConfigTypeDef sSlaveConfig = {0};
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220 | TIM_MasterConfigTypeDef sMasterConfig = {0};
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221 |
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222 | /* USER CODE BEGIN TIM2_Init 1 */
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223 |
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224 | /* USER CODE END TIM2_Init 1 */
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225 | htim2.Instance = TIM2;
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226 | htim2.Init.Prescaler = 0;
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227 | htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
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228 | htim2.Init.Period = 0xFFFFFFFF;
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229 | htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
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230 | htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
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231 | if (HAL_TIM_Base_Init(&htim2) != HAL_OK)
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232 | {
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233 | Error_Handler();
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234 | }
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235 | sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_ETRMODE2;
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236 | sClockSourceConfig.ClockPolarity = TIM_CLOCKPOLARITY_NONINVERTED;
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237 | sClockSourceConfig.ClockPrescaler = TIM_CLOCKPRESCALER_DIV1;
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238 | sClockSourceConfig.ClockFilter = 0;
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239 | if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)
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240 | {
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241 | Error_Handler();
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242 | }
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243 | sSlaveConfig.SlaveMode = TIM_SLAVEMODE_DISABLE;
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244 | sSlaveConfig.InputTrigger = TIM_TS_ITR0;
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245 | if (HAL_TIM_SlaveConfigSynchro(&htim2, &sSlaveConfig) != HAL_OK)
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246 | {
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247 | Error_Handler();
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248 | }
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249 | sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
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250 | sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
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251 | if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)
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252 | {
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253 | Error_Handler();
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254 | }
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255 | /* USER CODE BEGIN TIM2_Init 2 */
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256 |
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257 | /* USER CODE END TIM2_Init 2 */
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258 |
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259 | }
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260 |
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261 | /**
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262 | * @brief UART5 Initialization Function
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263 | * @param None
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264 | * @retval None
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265 | */
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266 | static void MX_UART5_Init(void)
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267 | {
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268 |
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269 | /* USER CODE BEGIN UART5_Init 0 */
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270 |
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271 | /* USER CODE END UART5_Init 0 */
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272 |
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273 | /* USER CODE BEGIN UART5_Init 1 */
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274 |
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275 | /* USER CODE END UART5_Init 1 */
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276 | huart5.Instance = UART5;
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277 | huart5.Init.BaudRate = 250000;
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278 | huart5.Init.WordLength = UART_WORDLENGTH_8B;
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279 | huart5.Init.StopBits = UART_STOPBITS_2;
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280 | huart5.Init.Parity = UART_PARITY_NONE;
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281 | huart5.Init.Mode = UART_MODE_RX;
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282 | huart5.Init.HwFlowCtl = UART_HWCONTROL_NONE;
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283 | huart5.Init.OverSampling = UART_OVERSAMPLING_16;
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284 | huart5.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
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285 | huart5.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_RXOVERRUNDISABLE_INIT;//UART_ADVFEATURE_RXOVERRUNDISABLE_INIT
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286 | if (HAL_UART_Init(&huart5) != HAL_OK)
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287 | {
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288 | Error_Handler();
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289 | }
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290 | /* USER CODE BEGIN UART5_Init 2 */
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291 | huart5.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_RXOVERRUNDISABLE_INIT;//UART_ADVFEATURE_RXOVERRUNDISABLE_INIT
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292 | // Enable UART5 interrupts
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293 | HAL_NVIC_SetPriority(UART5_IRQn, 0, 0);
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294 | HAL_NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);
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295 | HAL_NVIC_EnableIRQ(UART5_IRQn);
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296 | /* USER CODE END UART5_Init 2 */
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297 |
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298 | }
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299 |
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300 |
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301 |
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302 |
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303 |
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304 |
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305 | /* USER CODE BEGIN 4 */
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306 |
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307 | // DMX512 UART5 receive interrupt handler-Ansatz mit Timer zur MAB-detection
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308 | void UART5_IRQHandlerX(void)
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309 | {
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310 | //HAL_UART_Transmit(&huart1, "U5IRQ\r\n", 9, 100);
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311 | uint32_t isrflags = READ_REG(huart5.Instance->ISR);
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312 | uint32_t cr1its = READ_REG(huart5.Instance->CR1);
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313 |
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314 | // Check for DMX512 break and mark-after-break conditions
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315 | if ((isrflags & USART_ISR_FE) != RESET)
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316 | {
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317 | // DMX512 break detected
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318 | dmx_state = DMX_STATE_START;
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319 | // Debug message
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320 | char* message = "DMX512 break detected\r\n";
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321 | HAL_UART_Transmit(&huart1, (uint8_t*)message, strlen(message), HAL_MAX_DELAY);
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322 |
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323 | // Start timer to measure time since break
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324 | __HAL_TIM_SET_COUNTER(&htim2, 0);
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325 | HAL_TIM_Base_Start_IT(&htim2);
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326 | }
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327 | else if ((isrflags & USART_ISR_RXNE) != RESET && (dmx_state == DMX_STATE_BREAK))//Change DMX_STATE_START to DMX_STATE_BREAK for check
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328 | {
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329 | // DMX512 mark-after-break detected
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330 | // Debug message
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331 | char* message = "DMX512 mark-after-break detected\r\n";
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332 | HAL_UART_Transmit(&huart1, (uint8_t*)message, strlen(message), HAL_MAX_DELAY);
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333 | dmx_state = DMX_STATE_DATA;
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334 | HAL_TIM_Base_Stop_IT(&htim2);
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335 | uint32_t time_since_break = __HAL_TIM_GET_COUNTER(&htim2);
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336 | uint32_t bit_time = (SystemCoreClock / 250000) / 8; // calculate bit time for 250 kbps baud rate
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337 | uint32_t data_offset = (time_since_break - bit_time) / bit_time;
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338 |
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339 | // Check that the data offset is within range
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340 | if (data_offset >= 0 && data_offset < DMX_FRAME_SIZE)
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341 | {
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342 | HAL_UART_Transmit(&huart1, "Offset in Range\r\n", 17, 100);
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343 | // Start receiving DMX512 data bytes
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344 | HAL_UART_Receive_IT(&huart5, &dmx_data[data_offset], DMX_FRAME_SIZE - data_offset);
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345 | // Wait for the data to be received
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346 | while (HAL_UART_GetState(&huart5) != HAL_UART_STATE_READY &&
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347 | HAL_UART_GetState(&huart5) != HAL_UART_STATE_BUSY_RX) {}
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348 | // Debug messages
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349 | char* message1 = "HAL_UART_Receive_IT() called\r\n";
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350 | HAL_UART_Transmit(&huart1, (uint8_t*)message1, strlen(message1), HAL_MAX_DELAY);
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351 | char* message2 = "Data offset: %d\r\n";
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352 | sprintf(buffer, message2, data_offset);
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353 | HAL_UART_Transmit(&huart1, (uint8_t*)buffer, strlen(buffer), HAL_MAX_DELAY);
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354 |
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355 | }
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356 | else
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357 | {
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358 | HAL_UART_Transmit(&huart1, "Offset NOT in Range\r\n", 21, 100);
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359 | // Invalid data offset, restart reception
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360 | dmx_state = DMX_STATE_BREAK;
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361 | HAL_UART_AbortReceive_IT(&huart5);
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362 | }
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363 | }
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364 | else if ((isrflags & USART_ISR_IDLE) != RESET)
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365 | {
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366 | // DMX512 frame received
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367 | dmx_received = 1;
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368 | dmx_state = DMX_STATE_IDLE;
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369 | __HAL_UART_CLEAR_IDLEFLAG(&huart5);
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370 |
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371 | // Debug message
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372 | char* message = "DMX512 frame received\r\n";
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373 | HAL_UART_Transmit(&huart1, (uint8_t*)message, strlen(message), HAL_MAX_DELAY);
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374 | // Wait for minimum inter-frame time (176 microseconds)
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375 | uint32_t frame_time = __HAL_TIM_GET_COUNTER(&htim2);
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376 | uint32_t inter_frame_time = frame_time - last_frame_time;
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377 | if (inter_frame_time < MIN_INTER_FRAME_TIME)
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378 | {
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379 | HAL_Delay(MIN_INTER_FRAME_TIME - inter_frame_time);
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380 | }
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381 | last_frame_time = frame_time;
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382 |
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383 | // Reset timer for next frame
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384 | __HAL_TIM_SET_COUNTER(&htim2, 0);
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385 | }
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386 | }
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387 |
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388 | // UART5 error interrupt handler
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389 | void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart)
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390 | {
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391 | // Error handling, restart reception
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392 | dmx_state = DMX_STATE_BREAK;
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393 | HAL_UART_AbortReceive_IT(&huart5);
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394 | HAL_UART_Receive_IT(&huart5, dmx_data, DMX_FRAME_SIZE);
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395 | }
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396 | // UART5 receive complete interrupt handler
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397 | void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
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398 | {
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399 | // Error handling, restart reception
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400 | dmx_state = DMX_STATE_BREAK;
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401 | HAL_UART_AbortReceive_IT(&huart5);
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402 | HAL_UART_Receive_IT(&huart5, dmx_data, DMX_FRAME_SIZE);
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403 | }
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404 |
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405 |
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406 | // TIM2 update interrupt handler
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407 | void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
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408 | {
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409 | if (htim->Instance == TIM2)
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410 | {
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411 | // Stop timer and reset DMX512 state
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412 | HAL_TIM_Base_Stop_IT(&htim2);
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413 | dmx_state = DMX_STATE_BREAK;
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414 | HAL_UART_AbortReceive_IT(&huart5);
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415 | }
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416 | }
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417 | /* USER CODE END 4 */
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418 |
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419 | /**
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420 | * @brief This function is executed in case of error occurrence.
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421 | * @retval None
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422 | */
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