#include???
#include???
#include???
#include???
#include???
#include???
#include???
#include???
#include?
#include???
#include???
#include???
#include???
#include??

#include??
#include?“s3c6410_gpio.h“??
??
?
#define?DEVICE_NAME?“dht11“??
#define?DQ?????????8??
#define?CFG_IN?????0??
#define?CFG_OUT????1??

int?dht11_major?=?0;??
int?dht11_minor?=?0;????
??
//?定義設(shè)備類型????
struct?cdev?cdev;??
?
static?struct?class?*dht11_class;??
??
/*?函數(shù)聲明?*/??
static?int?dht11_open（struct?inode?*inode?struct?file?*filp）;??
?
static?ssize_t?dht11_read（struct?file?*filp?char?__user?*buf??
????????????????????????????size_t?count?loff_t?*f_pos）;??
??
static?int?dht11_release（struct?inode?*inode?struct?file?*file）;

unsigned?char??dht11_read_byte（void）;
??
/******************************************************************************************************??
**?函數(shù)名稱:?dht11_open（）??
**?函數(shù)功能:?打開設(shè)備，初始化dht11??
**?入口參數(shù):?inode:設(shè)備文件信息;?filp:?被打開的文件的信息??
**?出口參數(shù):?成功時返回0失敗返回-1??
**?備????注:??
******************************************************************************************************/??
static?int?dht11_open（struct?inode?*inode?struct?file?*filp）??
{??
????printk（KERN_ERR?“open?sht11?success?\n“）;
????return?0;??
}??


//讀取dht11發(fā)送的8位數(shù)據(jù)?
unsigned?char??dht11_read_byte（void）??
{??????
????int?i=0;??
????int?num;???
????unsigned?char?flag=0;??
????unsigned?char?data=0;??
??????
??
????for（num=0;num<8;num++）??
????{????????????????
??????????i=0;??
??????????while（!s3c6410_gpio_getpin（DQ））??
??????????{??
????????????udelay（10）;??
????????????i++;??
????????????if（i>10）??
????????????break;??
???????????}??
????????????flag=0x0;??
????????????udelay（28）;??????????????
???????????if（s3c6410_gpio_getpin（DQ））??
???????????{??
????????????flag=0x01;????????????
???????????}??
????????????i=0;??
???????????while（s3c6410_gpio_getpin（DQ））??
???????????{??
????????????udelay（10）;??
????????????i++;??
????????????if（i>12）??
????????????break;??
???????????}??
???????????data<<=1;??
???????????data|=flag;??
????}????
????return?data;??
}
/******************************************************************************************************??
**?函數(shù)名稱:?dht11_read（）??
**?函數(shù)功能:?讀出dht11??
**?入口參數(shù):?????
******************************************************************************************************/??
static?ssize_t?dht11_read（struct?file?*filp?char?__user?*buf??
????????????????????????????size_t?count?loff_t?*f_pos）??
{??
????	????
????	int?i=0err;
????	unsigned?char?bufe[6]={0x00x00x00x00x00x0};

????	s3c6410_gpio_cfgpin（DQ?CFG_OUT）;??

??????s3c6410_gpio_setpin（DQ?1）;??
????????udelay（2）;??
??????s3c6410_gpio_setpin（DQ?

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件????????6648??2016-09-05?16:12??dht11.c
?????文件??????101051??2016-09-05?16:13??dht11_t.ko
?????文件?????????609??2016-09-05?16:12??dht11_test.c
?????文件????????8043??2016-09-05?16:13??dht11_test.test
?????文件????????1478??2016-08-29?10:05??s3c6410_gpio.h
?????文件??????527170??2012-02-14?19:01??DHT11說明書最新版.pdf