day5ARM

 循环点亮三个led灯

方法1

------------------led.h----------------
#ifndef __LED_H__
#define __LED_H__#define RCC (*(volatile unsigned int *)0x50000A28)
#define GPIOE ((GPIO_t *)0x50006000)
#define GPIOF ((GPIO_t *)0x50007000)//结构体封装
typedef struct
{volatile unsigned int MODER;volatile unsigned int OTYPER;volatile unsigned int OSPEED;volatile unsigned int PUPDR;volatile unsigned int IDR;volatile unsigned int ODR;
}GPIO_t;//RCC章节初始化
void RCC_INIT();
//LED1 ----> PE10
//LED1 - GPIO章节初始化
void LED1_GPIO_INIT();
//LED1点亮
void LED1_ON();
//LED1熄灭
void LED1_OFF();//LED2 ----> PF10
//LED2 - GPIO章节初始化
void LED2_GPIO_INIT();
//LED2点亮
void LED2_ON();
//LED2熄灭
void LED2_OFF();//LED3 ----> PF10
//LED3 - GPIO章节初始化
void LED3_GPIO_INIT();
//LED3点亮
void LED3_ON();
//LED3熄灭
void LED3_OFF();#endif------------------led.c----------------
#include "led.h"//LED1 ---> PE10
//RCC章节初始化
void RCC_INIT()
{RCC = RCC | (0x3 << 4);
}
//LED1 - GPIO章节初始化
void LED1_GPIO_INIT()
{//设置为输出模式 0x50006000[21,20] -> 01GPIOE->MODER &= (~(0x3 << 20));GPIOE->MODER |= (0x1 << 20);//设置为推挽输出 0x50006004[10] -> 0GPIOE->OTYPER &= (~(0x1 << 10));//设置为低速模式 0x50006008[21,20] -> 00GPIOE->OSPEED &= (~(0x3 << 20));//设置为禁止上下拉电阻 0x5000600c[21,20] -> 00GPIOE->PUPDR &= (~(0x3 << 20));
}
//LED1点亮
void LED1_ON()
{//点亮LED1 0x50006014[10] -> 1GPIOE->ODR |= (0x1 << 10);
}
//LED1熄灭
void LED1_OFF()
{//熄灭LED1 0x50006014[10] -> 0GPIOE->ODR &= (~(0x1 << 10));
}//LED2 ----> PF10
//LED2 - GPIO章节初始化
void LED2_GPIO_INIT()
{//设置为输出模式 0x50007000[21,20] -> 01GPIOF->MODER &= (~(0x3 << 20));GPIOF->MODER |= (0x1 << 20);//设置为推挽输出 0x50007004[10] -> 0GPIOF->OTYPER &= (~(0x1 << 10));//设置为低速模式 0x50007008[21,20] -> 00GPIOF->OSPEED &= (~(0x3 << 20));//设置为禁止上下拉电阻 0x5000700c[21,20] -> 00GPIOF->PUPDR &= (~(0x3 << 20));}
//LED2点亮
void LED2_ON()
{//点亮LED2 0x50007014[10] -> 1GPIOF->ODR |= (0x1 << 10);
}//LED2熄灭
void LED2_OFF()
{//熄灭LED2 0x50007014[10] -> 0GPIOF->ODR &= (~(0x1 << 10));
}//LED3 ----> PF10
//LED3 - GPIO章节初始化
void LED3_GPIO_INIT()
{//设置为输出模式 0x50006000[17,16] -> 01GPIOE->MODER &= (~(0x3 << 16));GPIOE->MODER |= (0x1 << 16);//设置为推挽输出 0x50006004[8] -> 0GPIOE->OTYPER &= (~(0x1 << 8));//设置为低速模式 0x50006008[17,16] -> 00GPIOE->OSPEED &= (~(0x3 << 16));//设置为禁止上下拉电阻 0x5000600c[17,16] -> 00GPIOE->PUPDR &= (~(0x3 << 16));
}//LED3点亮
void LED3_ON()
{//点亮LED3 0x50006014[8] -> 1GPIOE->ODR |= (0x1 << 8);
}
//LED3熄灭
void LED3_OFF()
{//熄灭LED3 0x50006014[8] -> 0GPIOE->ODR &= (~(0x1 << 8));
}-----------------main.c----------------
#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()
{// LED灯初始化RCC_INIT();LED1_GPIO_INIT();LED2_GPIO_INIT();LED3_GPIO_INIT();while(1){//点亮LED1LED1_ON();delay_ms(500);//熄灭LED1LED1_OFF();//点亮LED2LED2_ON();delay_ms(500);//熄灭LED2LED2_OFF();//点亮LED3LED3_ON();delay_ms(500);//熄灭LED3LED3_OFF();}return 0;
}

方法2