这个代码的问题在哪里

1万 · 2019-2-15 11:27

//很简单的只是拉高拉低PB6，但是调试就是不能拉高拉低PB6

ErrorStatus HSEStartUpStatus;

void RCC_Configuration(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);  // 36MZH

/* On STICE the PLL output clock is fixed to 48 MHz */
            RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);

/* 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)
            {
            }
      }

}

void Delay(vu32 nCount)
{
  for(; nCount!= 0;nCount--);
}

int main(void)
{
      GPIO_InitTypeDef GPIO_InitStructure;

      RCC_Configuration();

      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
      GPIO_InitStructure.GPIO_Pin=GPIO_Pin_6;
      GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
      GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_OD;
      GPIO_Init(GPIOB,&GPIO_InitStructure);
      GPIO_ResetBits(GPIOB,GPIO_Pin_6);

      while(1)
      {
                     GPIO_SetBits(GPIOB,GPIO_Pin_6);
                     Delay(500);
                     GPIO_ResetBits(GPIOB,GPIO_Pin_6);
                     Delay(500);
      }
}