ioctl控制LED、蜂鸣器、风扇、马达
LED
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_RCC_ADDR 0X50000A28
//功能码
#define LED_ON _IOW('l', 1, int)
#define LED_OFF _IOW('l', 0, int)
#endiftest.h
#include
#include
#include
#include
#include
#include
#include
#include
#include "head.h"
int main(int argc, char const *argv[])
{
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)
{
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); //关灯
break;
}
}
close(fd);
return 0;
} myled.h
#include
#include
#include
#include
#include
#include "head.h"
unsigned int major; // 定义一个变量保存主设备号
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;
// 封装操作方法
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;
}
}
return 0;
}
int mycdev_close(struct inode *inode, struct file *file)
{
printk("%s:%s:%d\n", __FILE__, __func__, __LINE__);
return 0;
}
//定义操作方法结构体变量并赋值
struct file_operations fops = {
.open = mycdev_open,
.unlocked_ioctl = mycdev_ioctl,
.release = mycdev_close,
};
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("寄存器初始化成功\n");
return 0;
}
static int __init mycdev_init(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");
// 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
head.h
#ifndef __HEAD_H__
#define __HEAD_H__
#include "stm32mp1xx_rcc.h"
#include "stm32mp1xx_gpio.h"
#include "stm32mp1xx_tim.h"
#define PHY_BUZZER_RCC 0X50000000
#define PHY_BUZZER_GPIOB 0x50003000
#define PHY_BUZZER_TIM4 0x40002000
//功能码
#define BUZZER_ON _IOW('l', 1, int)
#define BUZZER_OFF _IOW('l', 0, int)
#endiftest.h
#include
#include
#include
#include
#include
#include
#include
#include
#include "head.h"
int main(int argc, char const *argv[])
{
int a;
int fd = open("/dev/mybuzzer0", O_RDWR);
if (fd < 0)
{
printf("打开设备文件失败\n");
exit(-1);
}
while (1)
{
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, BUZZER_ON); //开
break;
case 0:
ioctl(fd, BUZZER_OFF); //关
break;
}
}
close(fd);
return 0;
} mybuzzer.h
#include
#include
#include
#include
#include
#include "head.h"
unsigned int major; // 定义一个变量保存主设备号
gpio_t *vir_buzzer;
tim2_3_4_5_t *vir_tim4;
rcc_t *vir_rcc;
struct class *cls;
struct device *dev;
// 封装操作方法
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 BUZZER_ON:
//打开蜂鸣器
vir_tim4->CCR1 = 300;
break;
case BUZZER_OFF:
//关闭蜂鸣器
vir_tim4->CCR1 = 0;
break;
}
return 0;
}
int mycdev_close(struct inode *inode, struct file *file)
{
printk("%s:%s:%d\n", __FILE__, __func__, __LINE__);
return 0;
}
//定义操作方法结构体变量并赋值
struct file_operations fops = {
.open = mycdev_open,
.unlocked_ioctl = mycdev_ioctl,
.release = mycdev_close,
};
int buzzer_init(void)
{
//寄存器地址的映射
vir_rcc = ioremap(PHY_BUZZER_RCC, sizeof(rcc_t));
if (vir_rcc == NULL)
{
printk("ioremap filed：%d\n", __LINE__);
return -ENOMEM;
}
vir_buzzer = ioremap(PHY_BUZZER_GPIOB, sizeof(gpio_t));
if (vir_buzzer == NULL)
{
printk("ioremap filed：%d\n", __LINE__);
return -ENOMEM;
}
vir_tim4 = ioremap(PHY_BUZZER_TIM4, sizeof(tim2_3_4_5_t));
if (vir_tim4 == 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->MP_APB1ENSETR |= (0x1 << 2);
vir_rcc->MP_AHB4ENSETR |= (0x1 << 1);
// GPIOB
vir_buzzer->MODER &= (~(0x3 << 12));
vir_buzzer->MODER |= (0x1 << 13);
vir_buzzer->AFRL &= (~(0xf << 24));
vir_buzzer->AFRL |= (0x1 << 25);
// TIM4
vir_tim4->PSC = 208;
vir_tim4->ARR = 1000;
vir_tim4->CCR1 = 300;
vir_tim4->CCMR1 &= (~(0X1 << 16));
vir_tim4->CCMR1 &= (~(0x3 << 5));
vir_tim4->CCMR1 |= (0x3 << 5);
vir_tim4->CCMR1 |= (0x1 << 3);
vir_tim4->CCMR1 &= (~(0x3 << 0));
vir_tim4->CCER |= (0x1 << 3);
vir_tim4->CCER &= (~(0x1 << 1));
vir_tim4->CCER |= (0x1 << 0);
vir_tim4->CR1 |= (0x1 << 7);
vir_tim4->CR1 &= (~(0x3 << 5));
vir_tim4->CR1 |= (0x1 << 4);
vir_tim4->CR1 |= (0x1 << 0);
printk("寄存器初始化成功\n");
return 0;
}
static int __init mycdev_init(void)
{
// 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, "mybuzzer");
if (IS_ERR(cls))
{
printk("向上提交目录失败\n");
return -PTR_ERR(cls);
}
printk("向上提交目录成功\n");
dev = device_create(cls, NULL, MKDEV(major, 0), NULL, "mybuzzer0");
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");
// 寄存器映射以及初始化
buzzer_init();
return 0;
}
static void __exit mycdev_exit(void)
{
// 取消地址映射
iounmap(vir_buzzer);
iounmap(vir_rcc);
iounmap(vir_tim4);
//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, "mychrdev");
}
module_init(mycdev_init);
module_exit(mycdev_exit);
MODULE_LICENSE("GPL");
风扇
head.h
#ifndef __HEAD_H__
#define __HEAD_H__
#include "stm32mp1xx_rcc.h"
#include "stm32mp1xx_gpio.h"
#include "stm32mp1xx_tim.h"
#define PHY_FAN_RCC 0X50000000
#define PHY_FAN_GPIOE 0x50006000
#define PHY_FAN_TIM1 0x44000000
//功能码
#define FAN_ON _IOW('l', 1, int)
#define FAN_OFF _IOW('l', 0, int)
#endiftest.h
#include
#include
#include
#include
#include
#include
#include
#include
#include "head.h"
int main(int argc, char const *argv[])
{
int a;
int fd = open("/dev/myfan0", O_RDWR);
if (fd < 0)
{
printf("打开设备文件失败\n");
exit(-1);
}
while (1)
{
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); //开
break;
case 0:
ioctl(fd, FAN_OFF); //关
break;
}
}
close(fd);
return 0;
} myfan.h
#include
#include
#include
#include
#include
#include "head.h"
unsigned int major; // 定义一个变量保存主设备号
gpio_t *vir_fan;
tim1_t *vir_tim1;
rcc_t *vir_rcc;
struct class *cls;
struct device *dev;
// 封装操作方法
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:
//打开风扇
vir_tim1->CCR1 = 700;
break;
case FAN_OFF:
//关闭风扇
vir_tim1->CCR1 = 0;
break;
}
return 0;
}
int mycdev_close(struct inode *inode, struct file *file)
{
printk("%s:%s:%d\n", __FILE__, __func__, __LINE__);
return 0;
}
//定义操作方法结构体变量并赋值
struct file_operations fops = {
.open = mycdev_open,
.unlocked_ioctl = mycdev_ioctl,
.release = mycdev_close,
};
int fan_init(void)
{
//寄存器地址的映射
vir_rcc = ioremap(PHY_FAN_RCC, sizeof(rcc_t));
if (vir_rcc == NULL)
{
printk("ioremap filed：%d\n", __LINE__);
return -ENOMEM;
}
vir_fan = ioremap(PHY_FAN_GPIOE, sizeof(gpio_t));
if (vir_fan == NULL)
{
printk("ioremap filed：%d\n", __LINE__);
return -ENOMEM;
}
vir_tim1 = ioremap(PHY_FAN_TIM1, sizeof(tim1_t));
if (vir_tim1 == 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->MP_APB2ENSETR |= (0x1 << 0);
vir_rcc->MP_AHB4ENSETR |= (0x1 << 4);
// GPIOE
vir_fan->MODER &= (~(0x3 << 18));
vir_fan->MODER |= (0x1 << 19);
vir_fan->AFRH &= (~(0xf << 4));
vir_fan->AFRH |= (0x1 << 4);
// TIM1
vir_tim1->PSC = 208;
vir_tim1->ARR = 1000;
vir_tim1->CCR1 = 700;
vir_tim1->CCMR1 &= (~(0X1 << 16));
vir_tim1->CCMR1 &= (~(0x3 << 5));
vir_tim1->CCMR1 |= (0x3 << 5);
vir_tim1->CCMR1 |= (0x1 << 3);
vir_tim1->CCMR1 &= (~(0x3 << 0));
vir_tim1->CCER |= (0x1 << 3);
vir_tim1->CCER &= (~(0x1 << 1));
vir_tim1->CCER |= (0x1 << 0);
vir_tim1->CR1 |= (0x1 << 7);
vir_tim1->CR1 &= (~(0x3 << 5));
vir_tim1->CR1 |= (0x1 << 4);
vir_tim1->CR1 |= (0x1 << 0);
vir_tim1->BDTR |= (0x1 << 15);
printk("寄存器初始化成功\n");
return 0;
}
static int __init mycdev_init(void)
{
// 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, "myfan");
if (IS_ERR(cls))
{
printk("向上提交目录失败\n");
return -PTR_ERR(cls);
}
printk("向上提交目录成功\n");
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");
// 寄存器映射以及初始化
fan_init();
return 0;
}
static void __exit mycdev_exit(void)
{
// 取消地址映射
iounmap(vir_fan);
iounmap(vir_rcc);
iounmap(vir_tim1);
//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, "mychrdev");
}
module_init(mycdev_init);
module_exit(mycdev_exit);
MODULE_LICENSE("GPL");
马达
head.h
#ifndef __HEAD_H__
#define __HEAD_H__
#include "stm32mp1xx_rcc.h"
#include "stm32mp1xx_gpio.h"
#include "stm32mp1xx_tim.h"
#define PHY_MOTOR_RCC 0X50000000
#define PHY_MOTOR_GPIOF 0x50007000
#define PHY_MOTOR_TIM16 0x44007000
//功能码
#define MOTOR_ON _IOW('l', 1, int)
#define MOTOR_OFF _IOW('l', 0, int)
#endiftest.h
#include
#include
#include
#include
#include
#include
#include
#include
#include "head.h"
int main(int argc, char const *argv[])
{
int a;
int fd = open("/dev/mymotor0", O_RDWR);
if (fd < 0)
{
printf("打开设备文件失败\n");
exit(-1);
}
while (1)
{
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); //开
break;
case 0:
ioctl(fd, MOTOR_OFF); //关
break;
}
}
close(fd);
return 0;
} mymotor.h
#include
#include
#include
#include
#include
#include "head.h"
unsigned int major; // 定义一个变量保存主设备号
gpio_t *vir_motor;
tim16_17_t *vir_tim16;
rcc_t *vir_rcc;
struct class *cls;
struct device *dev;
// 封装操作方法
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:
//打开蜂鸣器
vir_tim16->CCR1 = 700;
break;
case MOTOR_OFF:
//关闭蜂鸣器
vir_tim16->CCR1 = 0;
break;
}
return 0;
}
int mycdev_close(struct inode *inode, struct file *file)
{
printk("%s:%s:%d\n", __FILE__, __func__, __LINE__);
return 0;
}
//定义操作方法结构体变量并赋值
struct file_operations fops = {
.open = mycdev_open,
.unlocked_ioctl = mycdev_ioctl,
.release = mycdev_close,
};
int motor_init(void)
{
//寄存器地址的映射
vir_rcc = ioremap(PHY_MOTOR_RCC, sizeof(rcc_t));
if (vir_rcc == NULL)
{
printk("ioremap filed：%d\n", __LINE__);
return -ENOMEM;
}
vir_motor = ioremap(PHY_MOTOR_GPIOF, sizeof(gpio_t));
if (vir_motor == NULL)
{
printk("ioremap filed：%d\n", __LINE__);
return -ENOMEM;
}
vir_tim16 = ioremap(PHY_MOTOR_TIM16, sizeof(tim16_17_t));
if (vir_tim16 == 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->MP_APB2ENSETR |= (0x1 << 3);
vir_rcc->MP_AHB4ENSETR |= (0x1 << 5);
// GPIOF
vir_motor->MODER &= (~(0x3 << 12));
vir_motor->MODER |= (0x1 << 13);
vir_motor->AFRL &= (~(0xf << 24));
vir_motor->AFRL |= (0x1 << 24);
// TIM16
vir_tim16->PSC = 208;
vir_tim16->ARR = 1000;
vir_tim16->CCR1 = 0;
vir_tim16->CCMR1 &= (~(0X1 << 16));
vir_tim16->CCMR1 &= (~(0x3 << 5));
vir_tim16->CCMR1 |= (0x3 << 5);
vir_tim16->CCMR1 |= (0x1 << 3);
vir_tim16->CCMR1 &= (~(0x3 << 0));
vir_tim16->CCER |= (0x1 << 3);
vir_tim16->CCER &= (~(0x1 << 1));
vir_tim16->CCER |= (0x1 << 0);
vir_tim16->CR1 |= (0x1 << 7);
vir_tim16->CR1 &= (~(0x3 << 5));
vir_tim16->CR1 |= (0x1 << 4);
vir_tim16->CR1 |= (0x1 << 0);
vir_tim16->BDTR |= (0x1 << 15);
printk("寄存器初始化成功\n");
return 0;
}
static int __init mycdev_init(void)
{
// 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, "mymotor");
if (IS_ERR(cls))
{
printk("向上提交目录失败\n");
return -PTR_ERR(cls);
}
printk("向上提交目录成功\n");
dev = device_create(cls, NULL, MKDEV(major, 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");
// 寄存器映射以及初始化
motor_init();
return 0;
}
static void __exit mycdev_exit(void)
{
// 取消地址映射
iounmap(vir_motor);
iounmap(vir_rcc);
iounmap(vir_tim16);
//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, "mychrdev");
}
module_init(mycdev_init);
module_exit(mycdev_exit);
MODULE_LICENSE("GPL");