2410_keyboard.c

有了操作系统、TCP/IP协议栈、文件系统

/*
** $Id: 2410.c,v 1.6 2004/04/01 08:57:13 weiym Exp $
**
** 2410.c: Low Level Input Engine for SMDK2410 Dev Board.
** 
** Copyright (C) 2003 Feynman Software.
*/

/*
** 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
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "common.h"

#ifdef _SMDK2410_IAL

#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/poll.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <linux/kd.h>

#define KBD_DEVICE  "/dev/input/tty0"
#include "ial.h"
#include "2410.h"

/* for data reading from /dev/ts */
/*typedef struct {
     unsigned char  pressure;
     signed char   x;
     signed char   y;
} TS_EVENT;*/

typedef unsigned char TS_EVENT;
static int ts = -1;
static TS_EVENT ts_event;

#undef _DEBUG

/************************  Low Level Input Operations **********************/


#ifdef _LITE_VERSION 
static int wait_event (int which, int maxfd, fd_set *in, fd_set *out, fd_set *except,
                struct timeval *timeout)
#else
static int wait_event (int which, fd_set *in, fd_set *out, fd_set *except,
                struct timeval *timeout)
#endif
{
    fd_set rfds;
    int    retvalue = 0;
    int    e;

    if (!in) {
        in = &rfds;
        FD_ZERO (in);
    }
    
 if ((which & IAL_KEYEVENT) && ts >= 0){
        FD_SET (ts, in);
#ifdef _LITE_VERSION
        if(ts > maxfd) maxfd = ts;
#endif
    }

#ifdef _LITE_VERSION
    e = select (maxfd + 1, in, out, except, timeout) ;
#else
    e = select (FD_SETSIZE, in, out, except, timeout) ;
#endif

    if (e > 0) { 
        if (ts >= 0 && FD_ISSET (ts, in)) {
		    int rs;
            FD_CLR (ts, in);

            printf ("begin to read\n");
            rs = read (ts, &ts_event, sizeof (TS_EVENT));      
			printf ("get char is  %c\n", ts_event);
             retvalue |= IAL_KEYEVENT;
            }

           
        }

    else if (e < 0) {
        return -1;
    }

    return retvalue;
}

BOOL Init2410Input (INPUT* input, const char* mdev, const char* mtype)
{
    /* mdev should be /dev/ts */
    mdev="/dev/input/keybdev0";
    ts = open (mdev, O_RDONLY);
    if (ts < 0) {
        printf ("2410: Can not open keydev: %s!\n", mdev);
        return FALSE;
    }

    printf ("In 2410 engine\n");


    input->wait_event = wait_event;
    
    return TRUE;
}

void Term2410Input(void) 
{
    if (ts >= 0)
        close(ts);    
}

#endif /* _SMDK2410_IAL */