/*** $Id: comminput.c,v 1.5 2005/02/03 01:06:53 xwyan Exp $**** comminput.c: Common Input Engine for eCos, uC/OS-II, VxWorks, ...** ** Copyright (C) 2004 Feynman Software**** Created by Zhong Shuyi, 2004/02/29*//*** 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 <fcntl.h>#include "common.h"#include "minigui.h"#include "misc.h"#include "ial.h"#include "comminput.h"#include "i2c.h"int  fd_zlg7290 = -1;//////////////////////////////////////////////////////////////////////////////// COMM_IAL相關函數聲明 (在comm_drive.c中實現)extern int comm_ts_getdata (short *x, short *y, short *button);extern int comm_kb_getdata (short *key, short *status);extern int comm_wait_for_input(void);/////////////////////////////////////////////////////////////////////////////// 引擎所所需要的變量static int MOUSEX = 50, MOUSEY = 50, MOUSEBUTTON = 0;		// 鼠標static short KEYCODE = 0, KEYSTATUS = 0;				// 按鍵// 通知底層引擎更新鼠標信息 (返回1)static int mouse_update (void){    return 1;	}// 獲得最新的鼠標(x,y)坐標值static void mouse_getxy (int *x, int* y){    *x = MOUSEX;    *y = MOUSEY;}// 獲取鼠標按鈕狀態// 該函數的返回值可以是IAL_MOUSE_LEFTBUTTON(表示左鍵按下)、// IAL_MOUSE_MIDDLEBUTTON(表示中鍵按下)、IAL_MOUSE_RIGHTBUTTON// (表示右鍵按下)等值"或"的結果。static int mouse_getbutton (void){    return MOUSEBUTTON;}/////////////////////////////////////////////////////////////////////////////static unsigned char kbd_state[NR_KEYS];	// 鍵盤狀態緩沖區// 通知底層引擎更新鍵盤信息 (更改kbd_state數組，表明有按鍵)static int keyboard_update (void){    kbd_state[KEYCODE] = KEYSTATUS;    return KEYCODE + 1;}// 獲取鍵盤狀態，返回一個字符數組(包括多個按鍵的狀態)，其中包含以掃描碼索引的鍵盤按鍵狀態。static const char* keyboard_getstate (void){    return kbd_state;}/////////////////////////////////////////////////////////////////////////////static int wait_event( int which, fd_set *in, fd_set *out, fd_set *except,                       struct timeval *timeout){    int retvalue = 0;       retvalue = comm_wait_for_input ();	// 查詢鍵盤或鼠標事件(需要掛起任務)        if (retvalue & IAL_MOUSEEVENT) 	// 鼠標事件     {        // 如果是觸摸屏，則有button按鍵時才會更新MOUSEX、MOUSEY        comm_ts_getdata (&MOUSEX, &MOUSEY, &MOUSEBUTTON);        retvalue = IAL_MOUSEEVENT;    }    else     {      	if (retvalue & IAL_KEYEVENT) 	// 鍵盤事件       	{           	comm_kb_getdata (&KEYCODE, &KEYSTATUS);        	if (kbd_state[KEYCODE] == KEYSTATUS) return -1;		           	retvalue = IAL_KEYEVENT;       	}       	else        	{     		retvalue = -1;       	}    }            return(retvalue);}/////////////////////////////////////////////////////////////////////////////// 輸入引擎的初始化函數。該函數負責對INPUT結構的其它成員賦值。BOOL InitCOMMInput (INPUT* input, const char* mdev, const char* mtype){	    // 在此函數調用之前必須初始化輸入設備硬件。    // (可以在此調用初始化函數)        fd_zlg7290 = open("/dev/zlg7290", O_RDWR);    if(fd_zlg7290 == -1)    {        fprintf(stderr, "Cann't open file: /dev/zlg7290 !!!\n");        return(FALSE);    }    ioctl(fd_zlg7290, I2C_SET_CLH, ((11059200 / 30000) + 1) / 2);    ioctl(fd_zlg7290, I2C_SET_CLL, (11059200 / 30000) / 2);        input->update_mouse = mouse_update;    input->get_mouse_xy = mouse_getxy;    input->set_mouse_xy = NULL;				// 上層調用該函數可以設置鼠標位置到新的坐標值。    input->get_mouse_button = mouse_getbutton;    input->set_mouse_range = NULL;			// 設置鼠標的活動范圍。    input->suspend_mouse= NULL;    input->resume_mouse = NULL;    input->update_keyboard = keyboard_update;    input->get_keyboard_state = keyboard_getstate;    input->suspend_keyboard = NULL;			// 暫停鍵盤設備的讀取，用于虛擬控制臺切換。    input->resume_keyboard = NULL;			// 繼續鍵盤設備讀取，用于虛擬控制臺切換。    input->set_leds = NULL;					// 設置鍵盤的鎖定LED。    input->wait_event = wait_event;			// 上層調用該函數等待底層引擎上發生輸入事件    return(TRUE);}// 輸入引擎的終止清除函數void TermCOMMInput (void){	if (fd_zlg7290 >= 0) close(fd_zlg7290);}