【驱动开发day3作业】
head.h
#ifndef __HEAD_H__
#define __HEAD_H__
typedef struct{
unsigned int MODER;
unsigned int OTYPER;
unsigned int OSPEEDR;
unsigned int PUPDR;
unsigned int IDR;
unsigned int ODR;
}gpio_t;
#define PHY_LED1_ADDR 0X50006000
#define PHY_LED2_ADDR 0X50007000
#define PHY_LED3_ADDR 0X50006000
#define PHY_MOTOR_ADDR 0X50007000
#define PHY_FAN_ADDR 0X50006000
#define PHY_BEEP_ADDR 0X50003000
#define PHY_RCC_ADDR 0X50000A28
//功能码
#define LED_ON _IOW('l',1,int)
#define LED_OFF _IOW('l',0,int)
#define BEEP_ON _IOW('b',1,int)
#define BEEP_OFF _IOW('b',0,int)
#define FAN_ON _IOW('f',1,int)
#define FAN_OFF _IOW('f',0,int)
#define MOTOR_ON _IOW('m',1,int)
#define MOTOR_OFF _IOW('m',0,int)
#endif
应用层代码
#include
#include
#include
#include
#include
#include
#include
#include
#include "head.h"
int open_led()
{
int a, b;
int fd = open("/dev/myled0", O_RDWR);
if (fd < 0)
{
printf("打开设备文件失败\n");
exit(-1);
}
while (1)
{
// 从终端读取
printf("请输入指令\n");
printf("0(关灯) 1(开灯)\n");
printf("请输入>");
scanf("%d", &a);
printf("请输入要控制的灯 1(LED1) 2(LED2) 3(LED3)>");
scanf("%d", &b);
switch (a)
{
case 1:
ioctl(fd, LED_ON, b); // 开灯
break;
case 0:
ioctl(fd, LED_OFF, b);
break;
}
}
close(fd);
}
int open_beep()
{
int a, b;
int fd = open("/dev/mybeep0", O_RDWR);
if (fd < 0)
{
printf("打开设备文件失败\n");
exit(-1);
}
while (1)
{
// 从终端读取
printf("请输入指令\n");
printf("0(关闭蜂鸣器) 1(打开蜂鸣器)\n");
printf("请输入>");
scanf("%d", &a);
switch (a)
{
case 1:
ioctl(fd, BEEP_ON); // 打开
break;
case 0:
ioctl(fd, BEEP_OFF);
break;
}
}
close(fd);
}
int open_fan()
{
int a, b;
int fd = open("/dev/myfan0", O_RDWR);
if (fd < 0)
{
printf("打开设备文件失败\n");
exit(-1);
}
while (1)
{
// 从终端读取
printf("请输入指令\n");
printf("0(关闭风扇) 1(打开风扇)\n");
printf("请输入>");
scanf("%d", &a);
switch (a)
{
case 1:
ioctl(fd, FAN_ON); // 打开
break;
case 0:
ioctl(fd, FAN_OFF);
break;
}
}
close(fd);
}
int open_motor()
{
int a, b;
int fd = open("/dev/mymotor0", O_RDWR);
if (fd < 0)
{
printf("打开设备文件失败\n");
exit(-1);
}
while (1)
{
// 从终端读取
printf("请输入指令\n");
printf("0(关闭马达) 1(打开马达)\n");
printf("请输入>");
scanf("%d", &a);
switch (a)
{
case 1:
ioctl(fd, MOTOR_ON); // 打开
break;
case 0:
ioctl(fd, MOTOR_OFF);
break;
}
}
close(fd);
}
int main(int argc, char const *argv[])
{
int choice;
char buf[128] = {0};
printf("请选择你要控制哪个设备(1:灯 2:蜂鸣器 3:风扇 4:马达)");
scanf("%d",&choice);
switch (choice)
{
case 1:
open_led();
break;
case 2:
open_beep();
break;
case 3:
open_fan();
break;
case 4:
open_motor();
break;
}
return 0;
}
灯驱动代码
#include
#include
#include
#include
#include
#include "head.h"
int major;
char kbuf[128] = {0};
gpio_t *vir_led1;
gpio_t *vir_led2;
gpio_t *vir_led3;
unsigned int *vir_rcc;
struct class *cls;
struct device *dev;
int mycdev_open(struct inode *inode, struct file *file)
{
printk("%s:%s:%d\n", __FILE__, __func__, __LINE__);
return 0;
}
long mycdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
switch (cmd)
{
case LED_ON:
switch (arg)
{
case 1: // LED1
vir_led1->ODR |= (0x1 << 10); // LED1开灯
break;
case 2: // LED2
vir_led2->ODR |= (0x1 << 10); // LED2开灯
break;
case 3: // LED3
vir_led3->ODR |= (0x1 << 8); // LED3开灯
break;
}
break;
case LED_OFF:
switch (arg)
{
case 1:
vir_led1->ODR &= (~(0X1 << 10));
break;
case 2:
vir_led2->ODR &= (~(0X1 << 10));
break;
case 3:
vir_led3->ODR &= (~(0X1 << 8));
break;
}
break;
}
return 0;
}
int mycdev_close(struct inode *inode, struct file *file)
{
printk("%s:%s:%d\n", __FILE__, __func__, __LINE__);
return 0;
}
// 定义操作方法灯结构体变量并赋值
struct file_operations fops = {
.open = mycdev_open,
.unlocked_ioctl = mycdev_ioctl,
.release = mycdev_close,
};
// 灯的寄存器映射以及初始化
int all_led_init(void)
{
// 寄存器地址的映射
vir_led1 = ioremap(PHY_LED1_ADDR, sizeof(gpio_t));
if (vir_led1 == NULL)
{
printk("ioremap filed：%d\n", __LINE__);
return -ENOMEM;
}
vir_led2 = ioremap(PHY_LED2_ADDR, sizeof(gpio_t));
if (vir_led2 == NULL)
{
printk("ioremap filed：%d\n", __LINE__);
return -ENOMEM;
}
vir_led3 = vir_led1;
vir_rcc = ioremap(PHY_RCC_ADDR, 4);
if (vir_rcc == NULL)
{
printk("ioremap filed：%d\n", __LINE__);
return -ENOMEM;
}
printk("物理地址映射成功\n");
// 寄存器的初始化
// rcc
(*vir_rcc) |= (3 << 4);
// led1
vir_led1->MODER &= (~(3 << 20));
vir_led1->MODER |= (1 << 20);
vir_led1->ODR &= (~(1 << 10));
// led2
vir_led2->MODER &= (~(3 << 20));
vir_led2->MODER |= (1 << 20);
vir_led2->ODR &= (~(1 << 10));
// led3
vir_led3->MODER &= (~(3 << 16));
vir_led1->MODER |= (1 << 16);
vir_led1->ODR &= (~(1 << 8));
printk("灯的寄存器初始化成功\n");
return 0;
}
// 灯的设备注册
int led_dev_register(void)
{
int i;
// 字符设备驱动注册
major = register_chrdev(0, "mychrdev", &fops);
if (major < 0)
{
printk("字符设备驱动注册失败\n");
return major;
}
printk("字符设备驱动注册成功:major=%d\n", major);
// 向上提交目录
cls = class_create(THIS_MODULE, "myled");
if (IS_ERR(cls))
{
printk("向上提交目录失败\n");
return -PTR_ERR(cls);
}
printk("向上提交目录信息成功\n");
// 向上提交设备节点信息
for (i = 0; i < 3; i++)
{
dev = device_create(cls, NULL, MKDEV(major, i), NULL, "myled%d", i);
if (IS_ERR(dev))
{
printk("向上提交设备节点信息失败\n");
return -PTR_ERR(dev);
}
}
printk("向上提交设备节点成功\n");
return 0;
}
static int __init mycdev_init(void)
{
// 灯的设备注册
led_dev_register();
// 灯的寄存器映射以及初始化
all_led_init();
return 0;
}
static void __exit mycdev_exit(void)
{
// 取消地址映射
iounmap(vir_led1);
iounmap(vir_led2);
iounmap(vir_rcc);
// 销毁节点信息
int i;
for (i = 0; i < 3; i++)
{
device_destroy(cls, MKDEV(major, i));
}
// 销毁目录信息
class_destroy(cls);
// 注销字符设备驱动
unregister_chrdev(major, "mychrdev");
}
module_init(mycdev_init);
module_exit(mycdev_exit);
MODULE_LICENSE("GPL");
蜂鸣器驱动代码
#include "head.h"
#include
#include
#include
#include
#include
int magjor;
char kbuf[128] = {0};
gpio_t *vir_beep;
unsigned int *vir_rcc;
struct class *cls;
struct device *dev;
int mycdev_open(struct inode *inode, struct file *file)
{
printk("%s:%s:%d\n", __FILE__, __func__, __LINE__);
return 0;
}
long mycdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
switch (cmd)
{
case BEEP_ON:
vir_beep->ODR |= (0x1 << 6);
break;
case BEEP_OFF:
vir_beep->ODR &= (~(0x1 << 6));
break;
}
return 0;
}
int mycdev_close(struct inode *inode, struct file *file)
{
printk("%s:%s:%d\n", __FILE__, __func__, __LINE__);
return 0;
}
// 定义操作方法灯结构体变量并赋值
struct file_operations fops = {
.open = mycdev_open,
.unlocked_ioctl = mycdev_ioctl,
.release = mycdev_close,
};
// 蜂鸣器的寄存器映射以及初始化
int all_beep_init(void)
{
// 寄存器地址的映射
vir_beep = ioremap(PHY_BEEP_ADDR, sizeof(gpio_t));
if (vir_beep == NULL)
{
printk("ioremap filed：%d\n", __LINE__);
return -ENOMEM;
}
vir_rcc = ioremap(PHY_RCC_ADDR, 4);
if (vir_rcc == NULL)
{
printk("ioremap filed：%d\n", __LINE__);
return -ENOMEM;
}
printk("物理地址映射成功\n");
// 寄存器的初始化
// rcc
(*vir_rcc) |= (1 << 1);
vir_beep->MODER &= (~(3 << 12));
vir_beep->MODER |= (1 << 12);
vir_beep->ODR &= (~(1 << 6));
printk("寄存器初始化成功\n");
return 0;
}
// 蜂鸣器的设备注册
int beep_dev_register(void)
{
int i;
// 字符设备驱动注册
magjor = register_chrdev(0,"mybeepdev",&fops);
if (magjor < 0)
{
printk("字符设备驱动注册失败\n");
return magjor;
}
printk("字符设备驱动注册成功:major=%d\n", magjor);
// 向上提交目录
cls = class_create(THIS_MODULE, "mybeep");
if (IS_ERR(cls))
{
printk("向上提交目录失败\n");
return -PTR_ERR(cls);
}
printk("向上提交目录信息成功\n");
// 向上提交设备节点信息
dev = device_create(cls, NULL, MKDEV(magjor, 0), NULL, "mybeep0");
if (IS_ERR(dev))
{
printk("向上提交设备节点信息失败\n");
return -PTR_ERR(dev);
}
printk("向上提交设备节点成功\n");
return 0;
}
static int __init mycdev_init(void)
{
// 蜂鸣器的设备注册
beep_dev_register();
// 蜂鸣器的寄存器映射以及初始化
all_beep_init();
return 0;
}
static void __exit mycdev_exit(void)
{
// 取消地址映射
iounmap(vir_beep);
iounmap(vir_rcc);
// 销毁节点信息
device_destroy(cls, MKDEV(magjor, 0));
// 销毁目录信息
class_destroy(cls);
// 注销字符设备驱动
unregister_chrdev(magjor, "mybeepdev");
}
module_init(mycdev_init);
module_exit(mycdev_exit);
MODULE_LICENSE("GPL");
风扇驱动代码
#include
#include
#include
#include
#include
#include "head.h"
int major;
char kbuf[128] = {0};
gpio_t *vir_fan;
unsigned int *vir_rcc;
struct class *cls;
struct device *dev;
int mycdev_open(struct inode *inode, struct file *file)
{
printk("%s:%s:%d\n", __FILE__, __func__, __LINE__);
return 0;
}
long mycdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
switch (cmd)
{
case FAN_ON:
vir_fan->ODR |= (0x1 << 9);
break;
case FAN_OFF:
vir_fan->ODR &= (~(0x1 << 9));
break;
}
return 0;
}
int mycdev_close(struct inode *inode, struct file *file)
{
printk("%s:%s:%d\n", __FILE__, __func__, __LINE__);
return 0;
}
// 定义操作方法风扇结构体变量并赋值
struct file_operations fops = {
.open = mycdev_open,
.unlocked_ioctl = mycdev_ioctl,
.release = mycdev_close,
};
// 风扇的寄存器映射以及初始化
int all_fan_init(void)
{
// 寄存器地址的映射
vir_fan = ioremap(PHY_FAN_ADDR, sizeof(gpio_t));
if (vir_fan == NULL)
{
printk("ioremap filed：%d\n", __LINE__);
return -ENOMEM;
}
vir_rcc = ioremap(PHY_RCC_ADDR, 4);
if (vir_rcc == NULL)
{
printk("ioremap filed：%d\n", __LINE__);
return -ENOMEM;
}
printk("物理地址映射成功\n");
// 寄存器的初始化
// rcc
(*vir_rcc) |= (3 << 4);
//
vir_fan->MODER &= (~(3 << 18));
vir_fan->MODER |= (1 << 18);
vir_fan->ODR &= (~(1 << 9));
printk("风扇的寄存器初始化成功\n");
return 0;
}
// 风扇的设备注册
int fan_dev_register(void)
{
int i;
// 字符设备驱动注册
major = register_chrdev(0, "myfandev", &fops);
if (major < 0)
{
printk("字符设备驱动注册失败\n");
return major;
}
printk("字符设备驱动注册成功:major=%d\n", major);
// 向上提交目录
cls = class_create(THIS_MODULE, "myfan");
if (IS_ERR(cls))
{
printk("向上提交目录失败\n");
return -PTR_ERR(cls);
}
printk("向上提交目录信息成功\n");
// 向上提交设备节点信息
dev = device_create(cls, NULL, MKDEV(major, 0), NULL, "myfan0");
if (IS_ERR(dev))
{
printk("向上提交设备节点信息失败\n");
return -PTR_ERR(dev);
}
printk("向上提交设备节点成功\n");
return 0;
}
static int __init mycdev_init(void)
{
// 风扇的设备注册
fan_dev_register();
// 风扇的寄存器映射以及初始化
all_fan_init();
return 0;
}
static void __exit mycdev_exit(void)
{
// 取消地址映射
iounmap(vir_fan);
iounmap(vir_rcc);
// 销毁节点信息
device_destroy(cls, MKDEV(major, 0));
// 销毁目录信息
class_destroy(cls);
// 注销字符设备驱动
unregister_chrdev(major, "myfandev");
}
module_init(mycdev_init);
module_exit(mycdev_exit);
MODULE_LICENSE("GPL");
马达驱动代码
#include "head.h"
#include
#include
#include
#include
#include
int magjor;
char kbuf[128] = {0};
gpio_t *vir_motor;
unsigned int *vir_rcc;
struct class *cls;
struct device *dev;
int mycdev_open(struct inode *inode, struct file *file)
{
printk("%s:%s:%d\n", __FILE__, __func__, __LINE__);
return 0;
}
long mycdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
switch (cmd)
{
case MOTOR_ON:
vir_motor->ODR |= (0x1 << 6);
break;
case MOTOR_OFF:
vir_motor->ODR &= (~(0x1 << 6));
break;
}
return 0;
}
int mycdev_close(struct inode *inode, struct file *file)
{
printk("%s:%s:%d\n", __FILE__, __func__, __LINE__);
return 0;
}
// 定义操作方法灯结构体变量并赋值
struct file_operations fops = {
.open = mycdev_open,
.unlocked_ioctl = mycdev_ioctl,
.release = mycdev_close,
};
// 马达的寄存器映射以及初始化
int all_motor_init(void)
{
// 寄存器地址的映射
vir_motor = ioremap(PHY_MOTOR_ADDR, sizeof(gpio_t));
if (vir_motor == NULL)
{
printk("ioremap filed：%d\n", __LINE__);
return -ENOMEM;
}
vir_rcc = ioremap(PHY_RCC_ADDR, 4);
if (vir_rcc == NULL)
{
printk("ioremap filed：%d\n", __LINE__);
return -ENOMEM;
}
printk("物理地址映射成功\n");
// 寄存器的初始化
// rcc
(*vir_rcc) |= (1 << 1);
vir_motor->MODER &= (~(3 << 12));
vir_motor->MODER |= (1 << 12);
vir_motor->ODR &= (~(1 << 6));
printk("寄存器初始化成功\n");
return 0;
}
// 马达的设备注册
int motor_dev_register(void)
{
int i;
// 字符设备驱动注册
magjor = register_chrdev(0,"mymotordev",&fops);
if (magjor < 0)
{
printk("字符设备驱动注册失败\n");
return magjor;
}
printk("字符设备驱动注册成功:major=%d\n", magjor);
// 向上提交目录
cls = class_create(THIS_MODULE, "mymotor");
if (IS_ERR(cls))
{
printk("向上提交目录失败\n");
return -PTR_ERR(cls);
}
printk("向上提交目录信息成功\n");
// 向上提交设备节点信息
dev = device_create(cls, NULL, MKDEV(magjor, 0), NULL, "mymotor0");
if (IS_ERR(dev))
{
printk("向上提交设备节点信息失败\n");
return -PTR_ERR(dev);
}
printk("向上提交设备节点成功\n");
return 0;
}
static int __init mycdev_init(void)
{
// 马达的设备注册
motor_dev_register();
// 马达的寄存器映射以及初始化
all_motor_init();
return 0;
}
static void __exit mycdev_exit(void)
{
// 取消地址映射
iounmap(vir_motor);
iounmap(vir_rcc);
// 销毁节点信息
device_destroy(cls, MKDEV(magjor, 0));
// 销毁目录信息
class_destroy(cls);
// 注销字符设备驱动
unregister_chrdev(magjor, "mymotordev");
}
module_init(mycdev_init);
module_exit(mycdev_exit);
MODULE_LICENSE("GPL");
测试结果：
