LED灯代码：

#define PERIPH_BASE      ((unsigned int)0x40000000)#define AHB1PERIPH_BASE  (PERIPH_BASE + 0x00020000)#define GPIOF_BASE       (AHB1PERIPH_BASE + 0x1400)#define GPIOF_MODER 	 *(unsigned int*)(GPIOF_BASE+0x00)
#define GPIOF_BSRR 		 *(unsigned int*)(GPIOF_BASE+0x18)#define RCC_BASE 		(AHB1PERIPH_BASE + 0x3800)
#define RCC_AHB1ENR 	*(unsigned int*)(RCC_BASE+0x30)

main.c

#include "stm32f4xx.h"typedef unsigned int u32;   //unsigned int -- u32void SystemInit()
{}void delay(u32 i)
{while(i--);
}int main()
{RCC_AHB1ENR |= 1<<5;//GPIOF_MODER = (1<<(2*9));GPIOF_MODER = (5<<(2*9));;while(1){GPIOF_BSRR=(3<<(16+9));delay(0xFFFFF);GPIOF_BSRR=(3<<(9));delay(0xFFFFF);	}
}