建设网站的公司排名,wordpress中文主题团队,手机网站一键分享,青海建设厅质检站网站模块化驱动启动led,蜂鸣器,风扇,震动马达并加上Makefile
封装模块化驱动#xff0c;可自由安装卸载驱动#xff0c;便于驱动更新(附图)
1.安装模块驱动同时初始化各个设备并使能
2.该驱动会自动创建驱动节点.
3.通过c函数程序输入控制各个设备
4.卸载模块驱动 //编译驱动…模块化驱动启动led,蜂鸣器,风扇,震动马达并加上Makefile
封装模块化驱动可自由安装卸载驱动便于驱动更新(附图)
1.安装模块驱动同时初始化各个设备并使能
2.该驱动会自动创建驱动节点.
3.通过c函数程序输入控制各个设备
4.卸载模块驱动 //编译驱动(注意Makefile的编译到移植到开发板的内核) make archarm //安装驱动 insmod mycdev.ko //卸载驱动 rmmod mycdev //编译fun.c 函数(用到交叉工具编译) arm-linux-gnueabihf-gcc fun.c head.h //头文件
#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 //GPIOE 10
#define PHY_LED2_ADDR 0X50007000 //GPIOF 10
#define PHY_LED3_ADDR 0X50006000 //GPIOE 8
#define PHY_RCC_ADDR 0X50000A28 //RCC#define PHY_FAN_ADDR 0X50006000 //GPIOE 9 TIM1 风扇
#define PHY_ATO_ADDR 0X50007000 //GPIOF 6 TIM16 震动马达
#define PHY_WMM_ADDR 0X50003000 //GPIOB 6 TIM4 蜂鸣器//功能码
#define LED_ON _IOW(1,1,int)
#define LED_OFF _IOW(1,0,int)#endif // MACROmycmod.c //驱动函数
#include linux/init.h
#include linux/module.h
#include linux/fs.h
#include linux/io.h
#include linux/device.h
#include head.hunsigned int major;
char kbuf[128] {0};gpio_t *vir_led1;
gpio_t *vir_led2;
gpio_t *vir_led3;gpio_t *vir_wmm;
gpio_t *vir_fan;
gpio_t *vir_ato;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)
{int which;copy_from_user(which,(void *)arg,4);switch (cmd){case LED_ON:switch (which){case 1: // LED1vir_led1-ODR | (0x1 10); // LED1开灯break;case 2: // LED2vir_led2-ODR | (0x1 10); // LED2开灯break;case 3: // LED3vir_led3-ODR | (0x1 8); // LED3开灯break;case 4: // FANvir_fan-ODR | (0x1 9); // FAN开灯break;case 5: // ATOvir_ato-ODR | (0x1 6); // ATO开灯break;case 6: // WMMvir_wmm-ODR | (0x1 6); // WMM开灯break;}break;case LED_OFF:switch (which){case 1:vir_led1-ODR (~(0X1 10));break;case 2:vir_led2-ODR (~(0X1 10));break;case 3:vir_led3-ODR (~(0X1 8));break;case 4:vir_fan-ODR (~(0X1 9));break;case 5:vir_ato-ODR (~(0X1 6));break;case 6:vir_wmm-ODR (~(0X1 6));break;default:return -1;}default:return -1;}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,.release mycdev_close,.unlocked_ioctl mycdev_ioctl,
};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_fan vir_led1;vir_ato vir_led2;vir_wmm ioremap(PHY_WMM_ADDR, sizeof(gpio_t));if (vir_wmm 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_rcc) | (1 1);// led1vir_led1-MODER (~(3 20));vir_led1-MODER | (1 20);vir_led1-ODR (~(1 10));// led2vir_led2-MODER (~(3 20));vir_led2-MODER | (1 20);vir_led2-ODR (~(1 10));// led3vir_led3-MODER (~(3 16));vir_led1-MODER | (1 16);vir_led1-ODR (~(1 8));// WMM B 6vir_wmm-MODER (~(3 12));vir_wmm-MODER | (1 12);vir_wmm-ODR (~(1 6));// FAM E 9vir_fan-MODER (~(3 18));vir_fan-MODER | (1 18);vir_fan-ODR (~(1 9));// ATO F 6vir_ato-MODER (~(3 12));vir_ato-MODER | (1 12);vir_ato-ODR (~(1 6));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,mycdev,fops);if(major 0){printk(注册失败\n);return major;}printk(注册成功major %d\n,major);//向上提交目录cls class_create(THIS_MODULE,mycdev);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(向上提交设备节点信息成功\n);//寄存器映射以及初始化all_led_init();return 0;}
static void __exit mycdev_exit(void)
{int i;//设备初始化all_led_init();//取消虚拟映射iounmap(vir_led1);iounmap(vir_led2);iounmap(vir_led3);iounmap(vir_rcc);//销毁节点信息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,mycdev);printk(出口函数\n);
}module_init(mycdev_init);module_exit(mycdev_exit);MODULE_LICENSE(GPL);fun.c
#include stdio.h
#include unistd.h
#include sys/types.h
#include sys/stat.h
#include fcntl.h
#include stdlib.h
#include sys/ioctl.h
#include string.h
#include head.hint main(int argc, char const *argv[])
{/* code */int a,b;char buf[128] {0};printf(调用open\n);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) 1(开)\n);printf(请输入);scanf(%d,a);if(a){printf(打开以下设备\n);}else{printf(关闭以下设备\n);}printf( 1(LED1) 2(LED2) 3(LED3)\n);printf( 4(FAN) 5(ATO) 6(WMM)\n);printf(请输入要控制的设备);scanf(%d,b);switch(a){case 1:ioctl(fd,LED_ON,b);//开灯break;case 0:ioctl(fd,LED_OFF,b);break;}}printf(调用close\n);close (fd); return 0;
}
Makefile
modname ? mycdevarch ? armifeq ($(arch),arm)
KERNELDIR: /home/ubuntu/13_UBOOT/linux-stm32mp-5.10.61-stm32mp-r2-r0/linux-5.10.61
else
KERNELDIR:/lib/modules/$(shell uname -r)/build/
endifPWD:$(shell pwd)all:make -C $(KERNELDIR) M$(PWD) modulesclean:make -C $(KERNELDIR) M$(PWD) cleanobj-m:$(modname).o
