stm32f0xx_hal_helper.c

/**
  ******************************************************************************
  * @file    
  * @author  MCD Application Team
  * @version 
  * @date    
  * @brief   
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
  *
  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/software_license_agreement_liberty_v2
  *
  * Unless required by applicable law or agreed to in writing, software 
  * distributed under the License is distributed on an "AS IS" BASIS, 
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  ******************************************************************************
  */

#include "stm32f0xx.h"
#include "stm32f0xx_hal.h"

void SystemClock_Config(void)
{
  RCC_ClkInitTypeDef RCC_ClkInitStruct;
  RCC_OscInitTypeDef RCC_OscInitStruct;
  RCC_PeriphCLKInitTypeDef  PeriphClkInitStruct;
  static RCC_CRSInitTypeDef RCC_CRSInitStruct;

  /* Enable HSI48 Oscillator to be used as system clock source */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48;
  HAL_RCC_OscConfig(&RCC_OscInitStruct); 
  
  /* Select HSI48 as USB clock source */
  PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_USB;
  PeriphClkInitStruct.UsbClockSelection = RCC_USBCLKSOURCE_HSI48;
  HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct);
  
  /* Select HSI48 as system clock source and configure the HCLK and PCLK1 clock dividers */
  RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1);
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI48;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;  
  HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1);
  
  /*Configure the clock recovery system (CRS)**********************************/
  
  /*Enable CRS Clock*/
  __CRS_CLK_ENABLE(); 
  
  /* Default Synchro Signal division factor (not divided) */
  RCC_CRSInitStruct.Prescaler = RCC_CRS_SYNC_DIV1;
  
  /* Set the SYNCSRC[1:0] bits according to CRS_Source value */
  RCC_CRSInitStruct.Source = RCC_CRS_SYNC_SOURCE_USB;
  
  /* HSI48 is synchronized with USB SOF at 1KHz rate */
  RCC_CRSInitStruct.ReloadValue =  __HAL_RCC_CRS_CALCULATE_RELOADVALUE(48000000, 1000);
  RCC_CRSInitStruct.ErrorLimitValue = RCC_CRS_ERRORLIMIT_DEFAULT;
  
  /* Set the TRIM[5:0] to the default value*/
  RCC_CRSInitStruct.HSI48CalibrationValue = 0x20; 
  
  /* Start automatic synchronization */ 
  HAL_RCCEx_CRSConfig (&RCC_CRSInitStruct);
}

#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)
{ 
  __BKPT();
  /* 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) */

  /* Infinite loop */
  while (1)
  {
  }
}
#endif