main代码如下：

#include "./include/led.h"
extern void printf(const char *fmt, ...);
void delay_ms(int ms)
{int i,j;for(i = 0; i < ms;i++)for (j = 0; j < 1800; j++);
}int main()
{led1_init();led3_init();led2_init();// LED灯初始化while(1){led1_on();delay_ms(500);led1_off();delay_ms(500);led2_on();delay_ms(500);led2_off();delay_ms(500);led3_on();delay_ms(500);led3_off();delay_ms(500);}return 0;
}

led.h代码如下：

#ifndef __LED_H__
#define __LED_H__#define GPIOE (*(volatile unsigned int*)0x50000A28)
#define GPIOE_MODER (*(volatile unsigned int*)0x50006000)
#define GPIOE_OTYPER (*(volatile unsigned int*)0x50006004)
#define GPIOE_OSPEEDR (*(volatile unsigned int*)0x50006008)
#define GPIOE_PUPDR (*(volatile unsigned int*)0x5000600C)
#define GPIOE_ODR (*(volatile unsigned int*)0x50006014)#define GPIOF (*(volatile unsigned int*)0x50000A28)
#define GPIOF_MODER (*(volatile unsigned int*)0x50007000)
#define GPIOF_OTYPER (*(volatile unsigned int*)0x50007004)
#define GPIOF_OSPEEDR (*(volatile unsigned int*)0x50007008)
#define GPIOF_PUPDR (*(volatile unsigned int*)0x5000700C)
#define GPIOF_ODR (*(volatile unsigned int*)0x50007014)void led1_init();
void led1_on();
void led1_off();void led2_init();
void led2_on();
void led2_off();void led3_init();
void led3_on();
void led3_off();#endif

led.c代码如下：

#include "../include/led.h"void led1_init()
{GPIOE        |=(0x1<<4);GPIOE_MODER  &=(~(0x3<<20));GPIOE_MODER  |=(0x1<<20);GPIOE_OTYPER &=(~(0x1<<10));GPIOE_OSPEEDR&=(~(0x3<<20));GPIOE_PUPDR  &=(~(0x3<<20));}void led1_on()
{GPIOE_ODR |=(0x1<<10);
}void led1_off()
{GPIOE_ODR &=(0x1<<10);
}void led2_init()
{GPIOF        |=(0x1<<5);GPIOF_MODER  &=(~(0x3<<20));GPIOF_MODER  |=(0x1<<20);GPIOF_OTYPER &=(~(0x1<<10));GPIOF_OSPEEDR&=(~(0x3<<20));GPIOF_PUPDR  &=(~(0x3<<20));
}
void led2_on()
{GPIOF_ODR |=(0x1<<10);
}
void led2_off()
{GPIOF_ODR &=(0x1<<10);
}
void led3_init()
{GPIOE        |=(0x1<<4);GPIOE_MODER  &=(~(0x3<<16));GPIOE_MODER  |=(0x1<<16);GPIOE_OTYPER &=(~(0x1<<8));GPIOE_OSPEEDR&=(~(0x3<<16));GPIOE_PUPDR  &=(~(0x3<<16));}
void led3_on()
{GPIOE_ODR |=(0x1<<8);}
void led3_off()
{GPIOE_ODR &=(0x1<<8);
}

结果如果所示：