AnsweredAssumed Answered

F103 HSI instead of HSE

Question asked by karakaya.mehmet on Sep 6, 2014
Latest reply on Sep 7, 2014 by knik
hello dear forum,

I have changed F103 on the motherboard - however,
HSE doesnot start up 

but I can download code into the F103 with USART

I dont want to throw away the board

my question 
which lines to change how at the below startup code ?
for using HSI instead of HSE

thank you

void SetSysClockTo72(void)
{
  /* SYSCLK, HCLK, PCLK2 and PCLK1 configuration -----------------------------*/  
  /* RCC system reset(for debug purpose) */
  RCC_DeInit();
 
  /* Enable HSE */
  RCC_HSEConfig(RCC_HSE_ON);
 
  /* Wait till HSE is ready */
  HSEStartUpStatus = RCC_WaitForHSEStartUp();
 
  if (HSEStartUpStatus == SUCCESS)
  {
    /* Enable Prefetch Buffer */
    FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
 
    /* Flash 2 wait state */
    FLASH_SetLatency(FLASH_Latency_2);
  
    /* HCLK = SYSCLK */
    RCC_HCLKConfig(RCC_SYSCLK_Div1);
   
    /* PCLK2 = HCLK */
    RCC_PCLK2Config(RCC_HCLK_Div1);
 
    /* PCLK1 = HCLK/2 */
    RCC_PCLK1Config(RCC_HCLK_Div2);
     
    /* ADCCLK = PCLK2/4 */
    RCC_ADCCLKConfig(RCC_PCLK2_Div6);
//#else
    /* PLLCLK = 8MHz * 9 = 72 MHz */
    RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
//#endif
 
    /* Enable PLL */
    RCC_PLLCmd(ENABLE);
 
    /* Wait till PLL is ready */
    while (RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
    {
    }
 
    /* Select PLL as system clock source */
    RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
 
    /* Wait till PLL is used as system clock source */
    while(RCC_GetSYSCLKSource() != 0x08)
    {
    }
  }
  else
  { /* If HSE fails to start-up, the application will have wrong clock configuration.
       User can add here some code to deal with this error */   
 
    /* Go to infinite loop */
    while (1)
    {
    }
  }
}

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