pos机装驱动,linux LED设备驱动开发源代码

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本文目录一览：

1、发源pos机装驱动

pos机装驱动

#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/fs.h>

#include <linux/errno.h>

#include <linux/types.h>

//使用宋宝华推荐的装驱普通字符设备框架

#include <linux/fcntl.h>

#include <linux/cdev.h>

#include <linux/version.h>

#include <linux/vmalloc.h>

#include <linux/ctype.h>

#include <linux/pagemap.h>

#include <linux/device.h>

#include <asm/io.h>

//#include <asm/arch/regs-gpio.h> //2.6.12

#include <mach/regs-gpio.h> // 2.6.32

//LED1

#define LED1_OUT __raw_writel(( __raw_readl(S3C2410_GPBCON) & (~(3<<10)))|(1<<10),S3C2410_GPBCON) //

#define LED1_H __raw_writel(__raw_readl(S3C2410_GPBDAT)|(1<<5),S3C2410_GPBDAT)

#define LED1_L __raw_writel(__raw_readl(S3C2410_GPBDAT)&(~(1<<5)),S3C2410_GPBDAT)

//LED2

#define LED2_OUT __raw_writel(( __raw_readl(S3C2410_GPBCON) & (~(3<<12)))|(1<<12),S3C2410_GPBCON) //

#define LED2_H __raw_writel(__raw_readl(S3C2410_GPBDAT)|(1<<6),S3C2410_GPBDAT)

#define LED2_L __raw_writel(__raw_readl(S3C2410_GPBDAT)&(~(1<<6)),S3C2410_GPBDAT)

//LED3

#define LED3_OUT __raw_writel(( __raw_readl(S3C2410_GPBCON) & (~(3<<14)))|(1<<14),S3C2410_GPBCON) //

#define LED3_H __raw_writel(__raw_readl(S3C2410_GPBDAT)|(1<<7),S3C2410_GPBDAT)

#define LED3_L __raw_writel(__raw_readl(S3C2410_GPBDAT)&(~(1<<7)),S3C2410_GPBDAT)

//LED4

#define LED4_OUT __raw_writel(( __raw_readl(S3C2410_GPBCON) & (~(3<<16)))|(1<<16),S3C2410_GPBCON) //

#define LED4_H __raw_writel(__raw_readl(S3C2410_GPBDAT)|(1<<8),S3C2410_GPBDAT)

#define LED4_L __raw_writel(__raw_readl(S3C2410_GPBDAT)&(~(1<<8)),S3C2410_GPBDAT)

#define LEDOFF 0

#define LEDON 1

//#define DEMO_MAJOR 235 //静态分配

#define DEMO_MAJOR 0 //动态分配

#define DEMO_MINOR 0

int devmajor = DEMO_MAJOR;

int devminor = DEMO_MINOR;

dev_t dev = 0;

//设备结构

//设备结构

struct DEMO_dev

{

struct cdev cdev; /* Char device structure*/

};

struct DEMO_dev *DEMO_devices;

struct class *led_class;

int DEMO_open(struct inode *inode, struct file *filp)

{

struct DEMO_dev *demo_dev;

unsigned int temp;

filp->private_data=DEMO_devices;

//5

//LED1_OUT;

temp=__raw_readl(S3C2410_GPBCON); //__raw_readl函数在#include <asm/io.h> 定义

temp &= (~(3<<10))|(1<<10);

__raw_writel(temp,S3C2410_GPBCON);

//printk("S3C2410_GPBCON=%x,S3C2410_GPBDAT=%x",S3C2410_GPBCON,S3C2410_GPBDAT);

//S3C2410_GPBCON=fb000010,S3C2410_GPBDAT=fb000014

//6

//LED2_OUT;

temp=__raw_readl(S3C2410_GPBCON);

temp &= (~(3<<12))|(1<<12);

__raw_writel(temp,S3C2410_GPBCON);

//7

// LED3_OUT;

temp=__raw_readl(S3C2410_GPBCON);

temp &= (~(3<<14))|(1<<14);

__raw_writel(temp,S3C2410_GPBCON);

//8

//LED4_OUT;

temp=__raw_readl(S3C2410_GPBCON);

temp &= (~(3<<16))|(1<<16);

__raw_writel(temp,S3C2410_GPBCON);

return 0;

}

int DEMO_release(struct inode *inode, struct file *filp)

{

return 0;

}

int DEMO_ioctl(struct inode *inode, struct file *filp,unsigned int cmd, unsigned long arg)

{

unsigned int temp;

//printk("

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