[转]编写Linux下Input设备的检测程序
编写Linux下Input设备的检测程序
最近玩了下Android -x86的eclair，主题风格相
最近玩了下Android -x86的eclair，主题风格相对之前的1.6好看了很多，而且还加了不少之前没有的功能。但是触摸屏不能用，在终端下用getevent命令查看事件信息，发现得到的绝对坐标有很大出入（4096*4096）。于是想自己试着去解决这个问题。同时在Ubuntu 下 测试，发现居然没有getevent命令，当然可以用cat /dev/inpu/eventX查看事件信息，但是显示出来的是一堆乱码，怎么办？那就自己编写个Linux输入设备的测试小程序来检测问题所在吧，最 后测试结果发现和在Android下一样的问题-没有校正，总算也小有成就。接下来应该再dig触摸屏的校正问题：-)
现在把写的测试程序放上来供大家参考：
代码中宏定义KEY_DEV、MOU_DEV、TOUS_DEV、TOUP_DEV是Linux下键盘，鼠标，触摸屏和触摸板的设备文件路径，对于不同的系统和机器可能有所不同，大家可以用cat /proc/bus/input/devices 查看自己机器的设备文件。
用gcc -o outfilename filename 编 译生成可执行文件，然后./outfilename运行文件，注意修改生成的可执行文件权限，不想修改权限的用sudo ./outfilename。目前还没加入测试过程中切换测试设备的功能，只能用CTRL+Z结束程序，再重新执行文件。有时间可以再摸索下加个这个功 能，呵呵~~
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <fcntl.h>
#include <linux/input.h>
#define KEY_DEV “/dev/input/event5″
#define MOU_DEV “/dev/input/event6″
#define TOUS_DEV “/dev/input/event7″
#define TOUP_DEV “/dev/input/event11″
static int ts_fd = - 1 ;
static struct input_event data ;
static int init_device (char * TS_DEV )
{
if ((ts_fd = open (TS_DEV , O_RDONLY )) < 0 )
{
printf (“Error open %s /n/n “ , TS_DEV );
return - 1 ;
}
return ts_fd ;
}
static int test_key ()
{
if (init_device (KEY_DEV ) < 0 )
return - 1 ;
while (1 )
{
read (ts_fd , & data , sizeof (data ));
if (data . type == EV_KEY )
printf (“ type: EV_KEY, event = %d, value = %d /n “ , data . code , data . value );
}
return 0 ;
}
static int test_mouse ()
{
if (init_device (MOU_DEV ) < 0 )
return - 1 ;
while (1 )
{
read (ts_fd , & data , sizeof (data ));
if (data . type == EV_KEY )
{
printf (“ type = EV_KEY, code = %s, value = %d /n “ ,
data . code == BTN_LEFT ? “MOUSE_LEFT” :
data . code == BTN_RIGHT ? “MOUSE_RIGHT” :
data . code == BTN_MIDDLE ? “MOUSE_MIDDLE” :
data . code == BTN_SIDE ? “MOUSE_SIDE” :
“Unkonw” , data . value );
}
else if (data . type == EV_REL )
{
printf (“ type = EV_ABS, code = %s, value = %d /n “ ,
data . code == REL_X ? “ABS_X” :
data . code == REL_Y ? “ABS_Y” :
data . code == ABS_WHEEL ? “MOUSE_WHEEL” :
data . code == ABS_PRESSURE ? “ABS_PRESSURE” :
“Unkown” , data . value );
}
}
return 0 ;
}
static int test_touch_screen ()
{
if (init_device (TOUS_DEV ) < 0 )
return - 1 ;
while (1 )
{
read (ts_fd , & data , sizeof (data ));
if (data . type == EV_KEY )
{
printf (“ type: EV_KEY, event = %s, value = %d /n/n “ ,
data . code == BTN_TOUCH ? “BTN_TOUCH” : “Unkown” , data . value );
}
else if (data . type == EV_ABS )
{
printf (“ type: EV_ABS, event = %s, value = %d /n/n “ ,
data . code == ABS_X ? “ABS_X” :
data . code == ABS_Y ? “ABS_Y” :
data . code == ABS_PRESSURE ? “ABS_PRESSURE” :
“Unkown” , data . value );
}
}
return 0 ;
}
static int test_touch_pancel ()
{
if (init_device (TOUP_DEV ) < 0 )
return - 1 ;
while (1 )
{
read (ts_fd , & data , sizeof (data ));
if (data . type == EV_KEY )
{
printf (“ type = EV_KEY, code = %s, value = %d /n “ ,
data . code == BTN_LEFT ? “MOUSE_LEFT” :
data . code == BTN_RIGHT ? “MOUSE_RIGHT” :
data . code == BTN_MIDDLE ? “MOUSE_MIDDLE” :
data . code == BTN_SIDE ? “MOUSE_SIDE” :
“Unkonw” , data . value );
}
else if (data . type == EV_REL )
{
printf (“ type = EV_ABS, code = %s, value = %d /n “ ,
data . code == REL_X ? “ABS_X” :
data . code == REL_Y ? “ABS_Y” :
data . code == ABS_WHEEL ? “MOUSE_WHEEL” :
data . code == ABS_PRESSURE ? “ABS_PRESSURE” :
“Unkown” , data . value );
}
}
return 0 ;
}
int main ()
{
static int i ;
select: printf (“Please select device: /n 0.KeyBoard /n 1.Mouse /n 2.TouchScreen /n 3.TouchPancel /n “ );
scanf (“%d” , & i );
switch (i ){
case 0 :
test_key ();
break ;
case 1 :
test_mouse ();
break ;
case 2 :
test_touch_screen ();
break ;
case 3 :
test_touch_pancel ();
break ;
default :
printf (“Wrong device, Please select again! /n/n “ );
break ;
}
goto select ;
return 0 ;
}