Linux下测试键盘鼠标触摸屏触摸板
Linux下测试键盘鼠标触摸屏触摸板
在Linux或者Android-x86系统下，会用到测试键盘、鼠标、触摸屏、触摸板等各种输入设备的功能，那么下面的这段代码是个好的选择。首先编写了个Linux输入设备的测试小程序来检测问题所在，测试结果发现没有校正，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。如你将代码保存为test.c，那么你可以用gcc -o test test.c来编译连接。然后在目录下使用./test运行文件，www.bkjia.com注意修改生成的可执行文件权限，不想修改权限的用sudo ./test。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。
#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:\n0.KeyBoard\n1.Mouse\n2.TouchScreen\n3.TouchPanel\n\Your choice is:");
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;
}
关于Input设备，说明：
（1）ls -l /dev/input，得到设备名称和属性，注意此处没有input号这种Input层分配的内容，以event为主。如：
# ls -l /dev/input
crw-rw---- root input 13, 66 1970-01-01 00:00 event2
crw-rw---- root input 13, 33 1970-01-01 00:00 mouse1
crwxrwxrwx root input 13, 65 1970-01-01 00:00 event1
crw-rw---- root input 13, 32 1970-01-01 00:00 mouse0
crw-rw---- root input 13, 64 1970-01-01 00:00 event0
crw-rw---- root input 13, 63 1970-01-01 00:00 mice
如果这么些设备中无法确认哪个是目前在用的设备？可以采用这种方式：cat他们，然后操作鼠标或者键盘，哪个输出乱码就是用的哪个。
（2）cat /proc/bus/input/devices，主要信息是：
N: Name="s3c-keypad-rev0000"
P: Phys=s3c-keypad/input0
S: Sysfs=/class/input/input0
H: Handlers=kbd event0
N: Name="S3C TouchScreen"
P: Phys=input(ts)
S: Sysfs=/class/input/input1
U: Uniq=
H: Handlers=kbd mouse0 event1
N: Name="ADXL34x accelerometer"
P: Phys=1-0053/input0
S: Sysfs=/class/input/input2
U: Uniq=
H: Handlers=mouse1 event2
分配的Input节点全在Sysfs上，真正的设备dev在Handlers上。
（3）ls -l /sys/class/input，类设备信息：
drwxr-xr-x root root 1970-01-01 00:00 mice
drwxr-xr-x root root 1970-01-01 00:00 input0
lrwxrwxrwx root root 1970-01-01 00:04 event0 -> input0/event0
drwxr-xr-x root root 1970-01-01 00:00 input1
lrwxrwxrwx root root 1970-01-01 00:04 mouse0 -> input1/mouse0
lrwxrwxrwx root root 1970-01-01 00:04 event1 -> input1/event1
drwxr-xr-x root root 1970-01-01 00:00 input2
lrwxrwxrwx root root 1970-01-01 00:04 mouse1 -> input2/mouse1
lrwxrwxrwx root root 1970-01-01 00:04 event2 -> input2/event2
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