keypad_test.c

这个是LINUX下的5×5键盘的测试程序

#include <stdio.h>
#include <linux/input.h>
#include <fcntl.h>


typedef struct input_event Myinputevent;

#define DEVICENAME "/dev/input/event0"

int main(int argc, char **argv)
{
	int i;
	int fd;
	int n;
	unsigned char data[8];
	Myinputevent event;
	
	fd = open( DEVICENAME , O_RDONLY, 0);				// ´ò豸
	if (fd < 0)
	{
		perror("Can't open device...\n");
		return 0;
	}
	
	while(1)
	{
			printf("Watting event ...\n\n\n");
		  n = read(fd, &event, sizeof(Myinputevent) );
		  if ( n != 16 )
			{
				perror(" Read data error! ");
				return 0;
			}
			
			if(event.type == EV_KEY)
			{	if((event.code >= BTN_MOUSE)&&(event.code <= BTN_BACK))
					printf("  Mouse key, the code is : %x ",event.code);
				if((event.code >= KEY_ESC)&&(event.code <= KEY_UNKNOWN))
					printf("  Keyboard key, the code is : %d ",event.code);
				if(event.value)
					printf("    Press down.\n");						
				else
					printf("    Press up.\n");
			}
			if(event.type == EV_REL)		// ¹켣ʼþÀÐ
			{
				if(event.code == REL_X)		// XÖÒ¶¯
					printf("  X track moving : %d\n\n",event.value);
				if(event.code == REL_Y)		// YÖÒ¶¯
					printf("  Y track moving : %d\n\n",event.value);
				if(event.code == REL_WHEEL)	// ÖÂÒ¶¯
					printf("  WHEEL track moving : %d\n\n",event.value);	
			}
	}
	return 0;
}