在工程中增加gpio lib.h和stm32头文件,如下： 

#include “stm32f10x.h” // Device header 

#include “stm32f10x_gpio.h”

调用lib配置gpio工作方式，先开启时钟，选GPIO，设置GPIO mode，gpio speed,主要看GPIO_InitTypeDef 结构体，芯片不同结构体不同，开始不清楚具体使用可以参考系统自带的example code，my setting如下： 

void GPIO_Initmain(void) 

{ 

GPIO_InitTypeDef GPIO_InitStructure; 

/* Configure all unused GPIO port pins in Analog Input mode (floating input 

trigger OFF), this will reduce the power consumption and increase the device 

immunity against EMI/EMC ***************************************/ 

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_3|GPIO_Pin_2; 

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; 

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; 

GPIO_Init(GPIOD, &GPIO_InitStructure); 

}

初始化后，操作GPIO，GPIO操作可以参考gpio的lib，调用lib实现gpio操作,如下： 

/**增加一个delay 

@brief Inserts a delay time.

@param nCount: specifies the delay time length.

@retval None 

*/ 

void Delay(__IO u32 nCount) 

{ 

for(; nCount != 0; nCount–); 

}

int main(void) 

{ 

GPIO_Initmain(); //初始化 

while (1) 

{ 

/* Turn on LD1 */ 

GPIO_ResetBits(GPIOD,GPIO_Pin_2); // IO 口拉低 

GPIO_SetBits(GPIOD,GPIO_Pin_3); // IO 口拉高 

GPIO_SetBits(GPIOD,GPIO_Pin_4); 

Delay(0xAFFFF); 

Delay(0xAFFFF); 

Delay(0xAFFFF); 

Delay(0xAFFFF); 

Delay(0xAFFFF); 

GPIO_SetBits(GPIOD,GPIO_Pin_2); 

GPIO_ResetBits(GPIOD,GPIO_Pin_3); 

GPIO_SetBits(GPIOD,GPIO_Pin_4); 

Delay(0xAFFFF); 

Delay(0xAFFFF); 

Delay(0xAFFFF); 

Delay(0xAFFFF); 

Delay(0xAFFFF); 

GPIO_SetBits(GPIOD,GPIO_Pin_2); 

GPIO_SetBits(GPIOD,GPIO_Pin_3); 

GPIO_ResetBits(GPIOD,GPIO_Pin_4); 

Delay(0xAFFFF); 

Delay(0xAFFFF); 

Delay(0xAFFFF); 

Delay(0xAFFFF); 

Delay(0xAFFFF); 

} 

} 

4.编译后down load运行，GPIO操作成功。