我配置的时钟文件如下，外部晶振是8M
void RCC_Configuration(void)
{  
  ErrorStatus       HSEStartUpStatus;
  RCC_ClocksTypeDef RCC_ClocksStatus;
 
  /* 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(ENABLE);
 /*000b Zero wait state, if 0 < SYSCLK≤ 24 MHz
      001b One wait state, if 24 MHz < SYSCLK ≤ 48 MHz
      010b Two wait states, if 48 MHz < SYSCLK ≤ 72 MHz*/
    /* Flash 1 wait state */
    FLASH_SetLatency(FLASH_Latency_1);
    /* DISABLE PLL */
    RCC_PLLCmd(DISABLE);
    /* Select PLL as system clock source */
    RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
    /* HCLK = SYSCLK */
    RCC_HCLKConfig(RCC_SYSCLK_Div1);
 
    /* PCLK1 = HCLK / 4 */
    RCC_PCLK1Config(RCC_HCLK_Div4);
    /* PCLK2 = HCLK / 2 */
    RCC_PCLK2Config(RCC_HCLK_Div2); 
// /* ADCCLK = PCLK2 / 4 */
// RCC_ADCCLKConfig(RCC_PCLK2_Div4);
/*这里是我下载了官方F2系列 时钟配置文件 ，参考此文件做的 RCC_PLLSource_HSE = 8M*/ 
/* PLLCLK = (RCC_PLLSource_HSE/8) * 192/2 = 96 MHz */
 RCC_PLLConfig(RCC_PLLSource_HSE,8,192,2,8);   
    /* Enable PLL */
    RCC_PLLCmd(ENABLE);
    /* Wait till PLL is ready */
    while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
    {
    }

    /* Wait till PLL is used as system clock source */
    while(RCC_GetSYSCLKSource() != 0x08)
    {
    }
 /* Get Clock */
 RCC_GetClocksFreq(&RCC_ClocksStatus);
 
// /* unused GPIO pins set to analog-input mode to improve EMC */
// GPIO_AIM_Init(1);
  }
//   SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK);//使用与系统同样的
// SysTick_SetReload(0xffffff);     //以最大开始重新装载
}
 
而我实际得到的是300M，附件里面有我读到的时钟值 不知道是哪里出错，望指点一二！！！