#include "stm32f10x_lib.h"
#define Delay(n) while((n)--)
void RCC_Configuration(void);
void GPIO_Configuration(void);
int main()
{ vu32 n=2000000;
RCC_Configuration();
GPIO_Configuration();
while (1)
{
GPIO_SetBits(GPIOB,GPIO_Pin_2);
GPIO_SetBits(GPIOB,GPIO_Pin_3);
Delay(n);
GPIO_ResetBits(GPIOB,GPIO_Pin_2);
GPIO_ResetBits(GPIOB,GPIO_Pin_3);
Delay(n);
}
}
void RCC_Configuration(void)
{
ErrorStatus HSEStartUpStatus;
RCC_DeInit(); RCC_HSEConfig(RCC_HSE_ON);
HSEStartUpStatus=RCC_WaitForHSEStartUp();
if(HSEStartUpStatus==SUCCESS)
  {
RCC_HCLKConfig(RCC_SYSCLK_Div1);
RCC_PCLK2Config(RCC_HCLK_Div1);
RCC_PCLK1Config(RCC_HCLK_Div2);
FLASH_SetLatency(FLASH_Latency_2);
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
RCC_PLLConfig(RCC_PLLSource_HSE_Div1,RCC_PLLMul_9);
RCC_PLLCmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY)==RESET);
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
while(RCC_GetSYSCLKSource()!=0x08);
   }
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);
}
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_2|GPIO_Pin_3;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
GPIO_Init(GPIOB,&GPIO_InitStructure);
} 此帖出自小平头技术问答