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ARM day5

news 来源：原创 2024/9/21 3:25:06

作业：封装流水灯

led.h

#ifndef __LED_H__
#define __LED_H__// 定义GPIO端口结构体，包含GPIO端口的各种寄存器
typedef struct
{unsigned int MODER;     // 端口模式寄存器unsigned int OTYPER;    // 端口输出类型寄存器unsigned int OSPEEDR;   // 端口速度寄存器unsigned int PUPDR;     // 端口上拉/下拉寄存器unsigned int IDR;       // 端口输入数据寄存器unsigned int ODR;       // 端口输出数据寄存器unsigned int BSRR;      // 端口位设置/重置寄存器
}gpio_t;// 定义GPIOE和GPIOF的地址
#define GPIOE ((gpio_t *)0x50006000)
#define GPIOF ((gpio_t *)0x50007000)void led1_init();void led2_init();void led3_init();void led1_ctl(int flag);void led2_ctl(int flag);void led3_ctl(int flag);#endif

led.c

#include "led.h"void led1_init()
{// 设置PE10为输出模式GPIOE->MODER &= (~(0x3 << 20));GPIOE->MODER |= (0x1 << 20);// 设置PE10为推挽输出GPIOE->OTYPER &= (~(0x1 << 10));// 设置PE10为低速输出GPIOE->OSPEEDR &= (~(0x3 << 20));// 设置PE10无上拉下拉GPIOE->PUPDR &= (~(0x3 << 20));
}
void led2_init()
{// 设置Pf10为输出模式GPIOF->MODER &= (~(0x3 << 20));GPIOF->MODER |= (0x1 << 20);// 设置PF10为推挽输出GPIOF->OTYPER &= (~(0x1 << 10));// 设置PF10为低速输出GPIOF->OSPEEDR &= (~(0x3 << 20));// 设置PF10无上拉下拉GPIOF->PUPDR &= (~(0x3 << 20));
}
void led3_init()
{// 设置PE8为输出模式GPIOE->MODER &= (~(0x3 << 16));GPIOE->MODER |= (0x1 << 16);// 设置PE8为推挽输出GPIOE->OTYPER &= (~(0x1 << 8));// 设置PE8为低速输出GPIOE->OSPEEDR &= (~(0x3 << 16));// 设置PE8无上拉下拉GPIOE->PUPDR &= (~(0x3 << 16));
}void led1_ctl(int flag)
{if (flag == 1){GPIOE->ODR |= (0x1 << 10);}else if (flag == 0){GPIOE->ODR &= (~(0x1 << 10));}
}void led2_ctl(int flag)
{if (flag == 1){GPIOF->ODR |= (0x1 << 10);}else if (flag == 0){GPIOF->ODR &= (~(0x1 << 10));}
}// LED3控制
void led3_ctl(int flag)
{if (flag == 1){GPIOE->ODR |= (0x1 << 8);}else if (flag == 0){GPIOE->ODR &= (~(0x1 << 8));}
}

main.c

#include "led.h"
// 手动封装一个延时函数
void delay_ms(int ms)
{int i, j;for (i = 0; i < ms; i++){for (j = 0; j < 2000; j++){}}
}
int main()
{// 使能GPIO的外设时钟*((unsigned int *)0X50000A28) |= (0X3 << 4);led1_init();led2_init();led3_init();while (1){// LED1亮led1_ctl(1);led2_ctl(0);led3_ctl(0);delay_ms(500);// LED2亮led1_ctl(0);led2_ctl(1);led3_ctl(0);delay_ms(500);delay_ms(500);// LED3亮led1_ctl(0);led2_ctl(0);led3_ctl(1);delay_ms(500);delay_ms(500);}return 0;
}

封装流水灯