generic_clock.c

/*
 *******************************************************************************
 * Copyright (c) 2020, STMicroelectronics
 * All rights reserved.
 *
 * This software component is licensed by ST under BSD 3-Clause license,
 * the "License"; You may not use this file except in compliance with the
 * License. You may obtain a copy of the License at:
 *                        opensource.org/licenses/BSD-3-Clause
 *
 *******************************************************************************
 */
#if defined(ARDUINO_GENERIC_H503RBTX)
#include "pins_arduino.h"

/**
  * @brief  System Clock Configuration
  * @param  None
  * @retval None
  */
WEAK void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {};
  RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {};

  /* 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 RCC Oscillators according to the specified parameters
   * in the RCC_OscInitTypeDef structure.
   */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48 | RCC_OSCILLATORTYPE_LSI
                                     | RCC_OSCILLATORTYPE_CSI;
  RCC_OscInitStruct.LSIState = RCC_LSI_ON;
  RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
  RCC_OscInitStruct.CSIState = RCC_CSI_ON;
  RCC_OscInitStruct.CSICalibrationValue = RCC_CSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLL1_SOURCE_CSI;
  RCC_OscInitStruct.PLL.PLLM = 1;
  RCC_OscInitStruct.PLL.PLLN = 125;
  RCC_OscInitStruct.PLL.PLLP = 2;
  RCC_OscInitStruct.PLL.PLLQ = 10;
  RCC_OscInitStruct.PLL.PLLR = 2;
  RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1_VCIRANGE_2;
  RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1_VCORANGE_WIDE;
  RCC_OscInitStruct.PLL.PLLFRACN = 0;
  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_CLOCKTYPE_PCLK3;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB3CLKDivider = RCC_HCLK_DIV1;
  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK) {
    Error_Handler();
  }

  /** Configure the programming delay
  */
  __HAL_FLASH_SET_PROGRAM_DELAY(FLASH_PROGRAMMING_DELAY_2);

  /* Initializes the peripherals clock */
  PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_ADCDAC | RCC_PERIPHCLK_LPUART1
                                             | RCC_PERIPHCLK_USB | RCC_PERIPHCLK_SPI1
                                             | RCC_PERIPHCLK_SPI2 | RCC_PERIPHCLK_SPI3;
  PeriphClkInitStruct.PLL2.PLL2Source = RCC_PLL2_SOURCE_CSI;
  PeriphClkInitStruct.PLL2.PLL2M = 1;
  PeriphClkInitStruct.PLL2.PLL2N = 125;
  PeriphClkInitStruct.PLL2.PLL2P = 2;
  PeriphClkInitStruct.PLL2.PLL2Q = 15;
  PeriphClkInitStruct.PLL2.PLL2R = 4;
  PeriphClkInitStruct.PLL2.PLL2RGE = RCC_PLL2_VCIRANGE_2;
  PeriphClkInitStruct.PLL2.PLL2VCOSEL = RCC_PLL2_VCORANGE_WIDE;
  PeriphClkInitStruct.PLL2.PLL2FRACN = 0;
  PeriphClkInitStruct.PLL2.PLL2ClockOut = RCC_PLL2_DIVQ | RCC_PLL2_DIVR;
  PeriphClkInitStruct.Lpuart1ClockSelection = RCC_LPUART1CLKSOURCE_PLL2Q;
  PeriphClkInitStruct.AdcDacClockSelection = RCC_ADCDACCLKSOURCE_PLL2R;
  PeriphClkInitStruct.UsbClockSelection = RCC_USBCLKSOURCE_HSI48;
  PeriphClkInitStruct.Spi1ClockSelection = RCC_SPI1CLKSOURCE_PLL1Q;
  PeriphClkInitStruct.Spi2ClockSelection = RCC_SPI2CLKSOURCE_PLL1Q;
  PeriphClkInitStruct.Spi3ClockSelection = RCC_SPI3CLKSOURCE_PLL1Q;
  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK) {
    Error_Handler();
  }
}

#endif /* ARDUINO_GENERIC_* */