test.c

该文件是摩托罗拉嵌入式芯片dragonball MX1在嵌入式linux下的键盘驱动

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Copyright (C) 2002, 2003 Motorola Semiconductors HK Ltd
 *
 */

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>


int main()
{
	int fd;
	char buf[2];
	int size;
	int i;
	
	fd = open("/dev/i2c-keypad",O_RDONLY);
	
	for(i=0;i<2;i++)
		buf[i] = 0;
	
//	printf("open fd=%d\n",fd);
	while(i<102){
		size = read(fd,buf,2);
		{
			//printf("app read okay---\n");
			printf("buf[%d] = %x\n",0,buf[0]);
			printf("buf[%d] = %x\n",1,buf[1]);
			/*switch(buf[0]){
				case 0xEF:
					switch(buf[1]){
						case 0xEF:
							break;
						case 0xF7:
							break;
						case 0xFB:
							break;
						case 0xFD:
							break;
						case 0xFE:
							break;
						default:
					}
					break;
				case 0xF7:
					switch(buf[1]){
						case 0xEF:
							break;
						case 0xF7:
							break;
						case 0xFB:
							break;
						case 0xFD:
							break;
						case 0xFE:
							break;
						default:
					}
					break;
				case 0xFB:
					switch(buf[1]){
						case 0xEF:
							break;
						case 0xF7:
							break;
						case 0xFB:
							break;
						case 0xFD:
							break;
						case 0xFE:
							break;
						default:
					}
					break;
				case 0xFD:
					switch(buf[1]){
						case 0xEF:
							break;
						case 0xF7:
							break;
						case 0xFB:
							break;
						case 0xFD:
							break;
						case 0xFE:
							break;
						default:
					}
					break;
				case 0xFE:
					switch(buf[1]){
						case 0xEF:
							break;
						case 0xF7:
							break;
						case 0xFB:
							break;
						case 0xFD:
							break;
						case 0xFE:
							break;
						default:
					}
					break;
				default:
					switch(buf[1]){
						case 0xEF:
							break;
						case 0xF7:
							break;
						case 0xFB:
							break;
						case 0xFD:
							break;
						case 0xFE:
							break;
						default:
					}
			}
			*/
			/*if ((~buf[0]&0x10) && (~buf[1]&0x10))
				printf("L ");
			if ((~buf[0]&0x10) && (~buf[1]&0x08))
				printf("R ");
			if ((~buf[0]&0x10) && (~buf[1]&0x04))
				printf("D ");
			if ((~buf[0]&0x08) && (~buf[1]&0x02))
				printf("U ");
			if ((~buf[0]&0x04) && (~buf[1]&0x01))
				printf("A ");
			if ((~buf[0]&0x02) && (~buf[1]&0x10))
				printf("B ");
			if ((buf[0]==0xFF) && (buf[1]==0xFF))
				printf("No keys are pressed ");
			printf("\n");
			*/
			//putchar('\r');
	
			//putchar(((~buf[0]&0x10) && (~buf[1]&0x10))?'L':' ');
			//putchar(((~buf[0]&0x10) && (~buf[1]&0x08))?'R':' ');
			//putchar(((~buf[0]&0x10) && (~buf[1]&0x04))?'U':' ');
			//putchar(((~buf[0]&0x08) && (~buf[1]&0x02))?'P':' ');
			//putchar(((~buf[0]&0x04) && (~buf[1]&0x01))?'A':' ');
			//putchar(((~buf[0]&0x02) && (~buf[1]&0x10))?'B':' ');
			//fflush(stdout);
						
		}
		i = i + 1;
	}
	close(fd);

	return 0;
}