驱动开发day1

头文件

#ifndef __HEAD_H__
#define __HEAD_H__
#define PHY_LED1_MODER 0X50006000
#define PHY_LED1_ODR   0X50006014

#define PHY_LED2_MODER 0x50007000
#define PHY_LED2_ODR   0x50007014

#define PHY_LED3_MODER 0x50006000
#define PHY_LED3_ODR   0x50006014

#define PHY_RCC        0X50000A28

#endif

demo1.c

#include 
#include 
#include 
#include 
#include 
#include "head.h"

unsigned int major;
char kbuf[128]={};
//定义指针指向映射后的虚拟内存
unsigned int *vir_moder1;
unsigned int *vir_odr1;
unsigned int *vir_moder2;
unsigned int *vir_odr2;
unsigned int *vir_moder3;
unsigned int *vir_odr3;
unsigned int *vir_rcc;

//封装操作方法
int mycdev_open(struct inode *inode, struct file *file)
{
        printk("%s:%s:%dn",__FILE__,__func__,__LINE__);
        return 0;
}
ssize_t mycdev_read(struct file *file,服务器托管网 char *ubuf, size_t size, loff_t *lof)
{
        printk("%s:%s:%dn",__FILE__,__func__,__LINE__);
        int ret;
        ret=copy_to_user(ubuf,kbuf,size);
        if(ret)
        {
                printk("copy_to_user filedn");
                return -EIO;
        }
        return 0;
}
ssize_t mycdev_write(struct file *file, const char *ubuf, size_t size, 服务器托管网loff_t *lof)
{
        printk("%s:%s:%dn",__FILE__,__func__,__LINE__);
        int ret;
        ret=copy_from_user(kbuf, ubuf,size);
        if(ret)
        {
                printk("copy_from_user filedn");
                return -EIO;  
        }
        if (kbuf[1] == '0')
        {
                // 关灯逻辑
				if (kbuf[0] == '1')
                	(*vir_odr1) &= (~(0X100
        (*vir_moder1) |= (0X101
        (*vir_odr1) &= (~(0X100
        (*vir_moder2) |= (0X101
        (*vir_odr2) &= (~(0X100
        (*vir_moder3) |= (0X101
        (*vir_odr3) &= (~(0X1

text.c

#include 
#include 
#include 
#include 
#include 
#include 
int main(int argc, char const *argv[])
{
    char buf[128] = {0};
    int fd = open("/dev/mychrdev", O_RDWR);
    if (fd ");
        fgets(buf,sizeof(buf),stdin);
        buf[strlen(buf)-1] = '';

        //调用write
        write(fd, buf, sizeof(buf));
        //memset(buf, 0, sizeof(buf));
        //read(fd, buf, sizeof(buf));
        //printf("buf:%sn",buf);
    }
    //调用close
    close(fd);
    return 0;
}

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