comm_drive.c

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/* IAL输入引擎底层驱动。
   本驱动程序是用于SmartARM2200开发板，开发板只有16个按键
   输入，没有鼠标或触摸屏。
*/
#include "common.h"
#include "minigui.h"

/* P0口寄存器定义 */
#define IO0PIN          (*((volatile unsigned long *) 0xE0028000)) 
#define IO0DIR          (*((volatile unsigned long *) 0xE0028008))  
#define PINSEL1         (*((volatile unsigned long *) 0xE002C004))

/* ZLG7290键盘中断引脚信号 */
#define	HAVE_KEY		(1<<30)

extern  int  fd_zlg7290;

/* 注意：要跟据驱动SWAP_XY_EN定义来设置这两个宏 */
#define  GUI_LCM_XMAX		240		/* 定义液晶x轴的点数 */
#define  GUI_LCM_YMAX		320		/* 定义液晶y轴的点数 */

static unsigned char  key_in;   	// 按键值变量

/* (模拟)鼠标左、中、右按键键值定义 */
#define  IAL_MOUSE_LEFTBUTTON    4
#define  IAL_MOUSE_MIDDLEBUTTON  2
#define  IAL_MOUSE_RIGHTBUTTON   1

/* (模拟)鼠标上下左右移动按键键值定义 */
#define  MOUSE_UPMOUVE           80
#define  MOUSE_DOWNMOUVE         81
#define  MOUSE_LEFTMOUVE         82
#define  MOUSE_RIGHTMOUVE        83


/* --------------------- For Common IAL Engine ----------------- */
/* Should be implemented if you use common ial engine in MiniGUI */

#define  COMM_MOUSEINPUT    0x01  /* 鼠标或触摸屏事件 */
#define  COMM_KBINPUT       0x02  /* 按键事件 */


/* 定义按键功能，16个按键安排如下：
   -----------------------------
   | TAB  | ENTER|  ESC | BACK |
   -----------------------------
   |  9   |  0   |  -   | SPACE|
   -----------------------------
   |  5   |  6   |  7   |  8   |
   -----------------------------
   |  1   |  2   |  3   |  4   |
   -----------------------------
*/
typedef struct
{   unsigned char  event;
    unsigned char  value;
}   KEY_MOUSE_EVENT;

KEY_MOUSE_EVENT  EVENT_CHG_TAB[16] = 
{   {COMM_KBINPUT, SCANCODE_1},
    {COMM_KBINPUT, SCANCODE_2},
    {COMM_KBINPUT, SCANCODE_3},
    {COMM_KBINPUT, SCANCODE_4},
    {COMM_KBINPUT, SCANCODE_5},
    {COMM_KBINPUT, SCANCODE_6},
    {COMM_KBINPUT, SCANCODE_7},
    {COMM_KBINPUT, SCANCODE_8},
    {COMM_KBINPUT, SCANCODE_9},
    {COMM_KBINPUT, SCANCODE_0},
    {COMM_KBINPUT, SCANCODE_MINUS},       
    {COMM_KBINPUT, SCANCODE_SPACE},
    {COMM_KBINPUT, SCANCODE_TAB},
    {COMM_KBINPUT, SCANCODE_ENTER},
    {COMM_KBINPUT, SCANCODE_ESCAPE},          
    {COMM_KBINPUT, SCANCODE_BACKSPACE}    
};

/* 判断是否有按键
   有按键返回1，否则返回0 
*/
unsigned char IsKeyIn(void)
{	int  i;
	
	for(i=0; i<50; i++);
	if((IO0PIN&HAVE_KEY) != 0) return(0);
		else return(1);
}


/* 读取键值
   返回值即为按键值，为0时表示无按键。
*/

unsigned char	ZLG7290_GetKey(void)
{   unsigned char temp[2];

    temp[0] = 1;
    temp[1] = 0;
    write(fd_zlg7290, temp, 1);
    read(fd_zlg7290, temp, 2);
    return(temp[0]);
}

	
/*
 * Waits for input for keyboard and touchpanel. 
 * If no data, this function should go into sleep;
 * when data is available, keyboard or touchpanel driver should wake up
 * the task/thread in MiniGUI who call comm_wait_for_input.
 *
 * Normal implementation make this function sleep on a ucosii semaphore.
 * return COMM_MOUSEINPUT or COMM_KBINPUT according to type of the input event.
 */
// 查询键盘或鼠标事件
int comm_wait_for_input (void)
{	static unsigned char  s_key_sta = 0;
	unsigned char  key;
	
	/* 设置P0.30口为输入模式 */
	PINSEL1 = PINSEL1 & 0xCFFFFFFF;
	IO0DIR = IO0DIR & 0xBFFFFFFF;
	
    while(1)        
    {	if(s_key_sta==0)		// 上次没有按键
    	{	if(IsKeyIn())
    		{	key = ZLG7290_GetKey();	// 读取按键
    		} 
    	   	else
    	   	{	key = 0;
    	   	}	
    	}
    	else
    	{	if(!IsKeyIn())
    		{	key = ZLG7290_GetKey();	// 读取按键
    		}     	   	
    	}
    	
    	
    	if(key)          		// 如果有按键，则判断是单击还是连击
	    {   if(s_key_sta==0)    // 按键单击	          	        
	        {   /* 设置消息中的按键值。d7位表示按键状态，按下为1，
                   放开为0；d3--d0为相应的按键值。 */
                    key_in = (key-1)&0x0F;     	// 原按键值为1-16，所以要减1变为0-15
	            key_in |= 0x80;
	            s_key_sta = 1;
	            return(EVENT_CHG_TAB[(key_in&0x0F)].event);   	              
	        }
	        else                	// 按键连击
	        {  	// 不处理连击 
	        } 	        	    
	    }
	    else    // 如果是没有按键，则判断是否按键放开	       
	    {   if(s_key_sta != 0)  // 按键放开
	        {   key_in &= 0x0F;
	            s_key_sta = 0; 
	            return(EVENT_CHG_TAB[(key_in&0x0F)].event);               	            
	        }	               
	    } // end of if(key)...else...    	
	    
	    usleep(15 * 1000);
    } // end of while(1)...

    return(0);       
}



/*
 * Gets touchpanel position and button data.
 * x, y   : position values
 * button : Non-zero value means pen is down.
 */
// 该函数的返回值可以是IAL_MOUSE_LEFTBUTTON(表示左键按下)、
// IAL_MOUSE_RIGHTBUTTON(表示右键按下)等值"或"的结果。
// 取得鼠标/触摸屏的参数
int comm_ts_getdata (int *x, int *y, int *button)      
{   /* 根据按键按下或放开进行相应的处理 */
    if((key_in&0x80) != 0)     // 按键按下
    {   switch(EVENT_CHG_TAB[(key_in&0x0F)].value)
        {   case MOUSE_DOWNMOUVE:           // 鼠标下移
                *y = (*y) + 5;
	            if((*y) > (GUI_LCM_YMAX-1))
	            {	*y = GUI_LCM_YMAX - 1;
	            }
                break;
            
            case MOUSE_UPMOUVE:             // 鼠标上移
                *y = (*y) - 5;
    		    if((*y) < 0)
		        {	*y = 0;
		        }
                break;
                
            case MOUSE_RIGHTMOUVE:          // 鼠标右移
                *x = (*x) + 5;
		        if((*x) > (GUI_LCM_XMAX-1))
		        {	*x = GUI_LCM_XMAX-1;
		        }
                break;
               
            case MOUSE_LEFTMOUVE:          // 鼠标左移
                *x = (*x) - 5;
		        if((*x) < 0)
		        {	*x = 0;
		        }                
                break;
            
            case IAL_MOUSE_LEFTBUTTON:      // 鼠标左键                              
            case IAL_MOUSE_RIGHTBUTTON:     // 鼠标右键
                *button = EVENT_CHG_TAB[(key_in&0x0F)].value;
                break;
                
            default:
                return(-1);
                
        } // end of switch(EVENT_CHG_TAB[(key&0x0F)].value) 
    }       
    else    // 按键放开
    {   *button = 0;
    } // end of if((key&0x80) != 0)...else...
    
    return(0);
}


/*
 * Gets keyboard key data.
 * key        : return MiniGUI scancode of the key.
 * key_status : key down or up, non-zero value means down.
 */
// 取得按键的参数
int comm_kb_getdata (short *key, short *key_status)    
{   /* 根据按键按下或放开进行相应的处理 */
    if((key_in&0x80) != 0)     // 按键按下
    {    *key = EVENT_CHG_TAB[(key_in&0x0F)].value;
	 *key_status = 1;                
    }       
    else    // 按键放开
    {   *key_status = 0;
    } // end of if((key&0x80) != 0)...else... 			
    
    return(0);
}