2410.c

minigui在mini2440开发板上IAL的移植.包含IAL源代码,在SMDK240的基础上修改成的,包含触摸屏和6个用户按钮的实现.

/*
** $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>

#include "ial.h"
#include "2410.h"

/* for data reading from /dev/ts */



typedef struct {
    unsigned short pressure;
    unsigned short x;
    unsigned short y;
    unsigned short pad;
} TS_EVENT;

static unsigned char state [NR_KEYS];
static int get_state[6];
static int get_flag[6];


static int ts = -1;
static int btn_fd = -1;

static int mousex = 0;
static int mousey = 0;
static TS_EVENT ts_event;

#undef _DEBUG

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


static int keyboard_update(void)
{
	unsigned char i;
	for (i=0; i < 6; i++)
	{
		if (get_flag[i])
		{    //映射键值,K1~K6分别映射为Enter键,B键,Tab键,BackSpace键,A键,Esc键
			switch(i)
			{
				case 0:
					state[SCANCODE_ENTER] = get_state[0]&KEY_RELEASED?0:1;
					break;
				case 1:
					state[SCANCODE_B] = get_state[1]&KEY_RELEASED?0:1;
					break;
				case 2:
					state[SCANCODE_TAB] = get_state[2]&KEY_RELEASED?0:1;
					break;
				case 3:
					state[SCANCODE_A] = get_state[3]&KEY_RELEASED?0:1;
					break;
				case 4:
					state[SCANCODE_BACKSPACE] = get_state[4]&KEY_RELEASED?0:1;
					break;
				case 5:	
					state[SCANCODE_ESCAPE] = get_state[5]&KEY_RELEASED?0:1;
					break;
								
						
			}
		}
	}
	memset(get_flag,0,sizeof(get_flag));
    return NR_KEYS;
}

static const char* keyboard_getstate(void)
{
    return (char *)state;
}


/*
 * Mouse operations -- Event
 */
static int mouse_update(void)
{
    return 1;
}

static void mouse_getxy(int *x, int* y)
{
#ifdef _DEBUG
    printf ("mousex = %d, mousey = %d\n", mousex, mousey);
#endif

    if (mousex < 0) mousex = 0;
    if (mousey < 0) mousey = 0;
    if (mousex > 239) mousex = 239;
    if (mousey > 319) mousey = 319;

    *x = mousex;
    *y = mousey;
}

static int mouse_getbutton(void)
{
    return ts_event.pressure;
}

#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_MOUSEEVENT) && ts >= 0) 
   {
        FD_SET (ts, in);
#ifdef _LITE_VERSION
        if (ts > maxfd) maxfd = ts;
#endif
    }

//----------------------------------------
    if ((which & IAL_KEYEVENT) && btn_fd >= 0)
		{
        FD_SET (btn_fd, in);
#ifdef _LITE_VERSION
        if(btn_fd > maxfd) maxfd = btn_fd;
#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);
            ts_event.x=0;
            ts_event.y=0;

            printf ("begin to read\n");
            rs = read (ts, &ts_event, sizeof (TS_EVENT));      
			printf ("rs = %d\n", rs);
			if (rs != sizeof(TS_EVENT))
			    return -1;
            
            if (ts_event.pressure > 0) 
	    {
                mousex = ts_event.x;
                mousey = 319 - ts_event.y;
            }

#ifdef _DEBUG
            if (ts_event.pressure > 0) {
                printf ("mouse down: ts_event.x = %d, ts_event.y = %d\n", ts_event.x, ts_event.y);
            }
#endif
            ts_event.pressure = ( ts_event.pressure > 0 ? 4:0);
            retvalue |= IAL_MOUSEEVENT;
        }

	//-----------------------------------
	
	 if (btn_fd >= 0 && FD_ISSET(btn_fd, in))
		{			
	        unsigned char key, i;
	        FD_CLR(btn_fd, in);
	        read(btn_fd, &get_state, sizeof(get_state));
			
		/*
			printf("key1 = %d\nkey2 = %d\nkey3 = %d\nkey4 = %d\nkey5 = %d\nkey6 = %d\n\n",
					get_state[0],get_state[1],get_state[2],
					get_state[3],get_state[4],get_state[5]);
		*/
			for(i=0; i < 6; i++)
			{
				if (get_state[i])
					get_flag[i] = 1;
					
			}


			
	        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 */
    ts = open (mdev, O_RDONLY);
    if (ts < 0) {
        fprintf (stderr, "2410: Can not open touch screen: %s!\n", mdev);
        return FALSE;
    }
	/*   KBD_DEVICE为/dev/buttons    */
    btn_fd = open (KBD_DEVICE, O_RDONLY | O_NONBLOCK);
    if (btn_fd < 0 ) {
        fprintf (stderr, "2410:  Can not open keyboard!\n");
        return FALSE;
    }

    printf ("In 2410 engine\n");

    input->update_mouse = mouse_update;
    input->get_mouse_xy = mouse_getxy;
    input->set_mouse_xy = NULL;
    input->get_mouse_button = mouse_getbutton;
    input->set_mouse_range = NULL;
//-----------------------------------

    input->update_keyboard = keyboard_update;
    input->get_keyboard_state = keyboard_getstate;
    input->set_leds = NULL;
    
//-----------------------------------
    input->wait_event = wait_event;
    mousex = 0;
    mousey = 0;
    ts_event.x = ts_event.y = ts_event.pressure = 0;
    
    return TRUE;
}

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

#endif /* _SMDK2410_IAL */