STM32H7 클럭설정 - HSI, HSE 480Mhz

STM32H7 클럭설정 - HSI, HSE 480Mhz

STM32H7의 최대 클럭 속도는 480Mhz 이다. HSI, HSE 로 각각 클럭 설정이 가능하다.

STM32H7 HSI 480Mhz

칩 내부에 64Mhz RC 오실레이터가 있어 최대 480Mhz로 설정이 가능하다.

STM32CubeMx에서 아래와 같이 설정하면 내부 클럭으로 480Mhz까지 설정 가능하다.

STM32CubeMx 에서 HSI 480Mhz로 생성한 코드

STM32H7 HSI 480Mhz

void SystemClock_Config(void)

{

  RCC_OscInitTypeDef RCC_OscInitStruct = {0};

  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};

  /** Supply configuration update enable

  */

  HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);

  /** Configure the main internal regulator output voltage

  */

  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

  while(!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}

  /** Initializes the CPU, AHB and APB busses clocks

  */

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;

  RCC_OscInitStruct.HSIState = RCC_HSI_DIV1;

  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;

  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;

  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;

  RCC_OscInitStruct.PLL.PLLM = 4;

  RCC_OscInitStruct.PLL.PLLN = 60;

  RCC_OscInitStruct.PLL.PLLP = 2;

  RCC_OscInitStruct.PLL.PLLQ = 2;

  RCC_OscInitStruct.PLL.PLLR = 2;

  RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_3;

  RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE;

  RCC_OscInitStruct.PLL.PLLFRACN = 0;

  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)

  {

    Error_Handler();

  }

  /** Initializes the CPU, AHB and APB busses clocks

  */

  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK

                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2

                              |RCC_CLOCKTYPE_D3PCLK1|RCC_CLOCKTYPE_D1PCLK1;

  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;

  RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;

  RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV2;

  RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2;

  RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2;

  RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2;

  RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)

  {

    Error_Handler();

  }

  PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_USART1;

  PeriphClkInitStruct.Usart16ClockSelection = RCC_USART16CLKSOURCE_D2PCLK2;

  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)

  {

    Error_Handler();

  }

  HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_PLL1QCLK, RCC_MCODIV_8);

}

---

STM32H7 HSE 480Mhz @25Mhz XTAL

STM32CubeMx 에서 HSI 480Mhz로 생성한 코드

STM32H7 480Mhz HSE @25Mhz XTAL

void SystemClock_Config(void)

{

  RCC_OscInitTypeDef RCC_OscInitStruct = {0};

  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};

  /** Supply configuration update enable

  */

  HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);

  /** Configure the main internal regulator output voltage

  */

  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE0);

  while(!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}

  /** Initializes the CPU, AHB and APB busses clocks

  */

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;

  RCC_OscInitStruct.HSIState = RCC_HSI_DIV1;

  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;

  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;

  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;

  RCC_OscInitStruct.PLL.PLLM = 4;

  RCC_OscInitStruct.PLL.PLLN = 60;

  RCC_OscInitStruct.PLL.PLLP = 2;

  RCC_OscInitStruct.PLL.PLLQ = 5;

  RCC_OscInitStruct.PLL.PLLR = 2;

  RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_3;

  RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE;

  RCC_OscInitStruct.PLL.PLLFRACN = 0;

  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)

  {

    Error_Handler();

  }

  /** Initializes the CPU, AHB and APB busses clocks

  */

  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK

                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2

                              |RCC_CLOCKTYPE_D3PCLK1|RCC_CLOCKTYPE_D1PCLK1;

  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;

  RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;

  RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV2;

  RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2;

  RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2;

  RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2;

  RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)

  {

    Error_Handler();

  }

  PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_HRTIM1|RCC_PERIPHCLK_USART1;

  PeriphClkInitStruct.Usart16ClockSelection = RCC_USART16CLKSOURCE_D2PCLK2;

  PeriphClkInitStruct.Hrtim1ClockSelection = RCC_HRTIM1CLK_TIMCLK;

  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)

  {

    Error_Handler();

  }

  HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_PLL1QCLK, RCC_MCODIV_4);

}