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
#include
#include
#include
#include
#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;
}