/* IAL輸入引擎底層驅(qū)動。
   本驅(qū)動程序是用于MagicARM2200實(shí)驗(yàn)箱，采用16個(gè)按鍵和觸摸屏輸入。
*/
#include "common.h"
#include "minigui.h"
#include "ucos_ii.h"

typedef unsigned char  uint8;                      
typedef unsigned short uint16; 
typedef unsigned int   uint32;

// 定義輸入消息數(shù)據(jù)結(jié)構(gòu)
typedef  struct  TOUCH_KEY
{   uint8  sta;     // 狀態(tài)字，d1位為1時(shí)表示按鍵輸入，d0為1時(shí)表示觸摸屏輸入；
                    // d7為1時(shí)表示按鍵/觸摸屏按下，為0時(shí)表示放開。
    uint8  key;     // 按鍵碼(0--15)
    
    // 觸摸屏輸入的坐標(biāo)
    uint16  x;      
    uint16  y;
}  TouchKey_Sta;


extern OS_EVENT  *TouchKeyMbox;     // 聲明按鍵/觸摸屏消息郵箱 
static TouchKey_Sta  *event_input;

/* (模擬)鼠標(biāo)左、中、右按鍵鍵值定義 */
#define  IAL_MOUSE_LEFTBUTTON    4
#define  IAL_MOUSE_MIDDLEBUTTON  2
#define  IAL_MOUSE_RIGHTBUTTON   1


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

#define  COMM_MOUSEINPUT    0x01  /* 鼠標(biāo)或觸摸屏事件 */
#define  COMM_KBINPUT       0x02  /* 按鍵事件 */


/* 定義按鍵功能，16個(gè)按鍵安排如下：
   -----------------------------
   |  7   |  8   |  9   |  /   |
   -----------------------------
   |  4   |  5   |  6   |  *   |
   -----------------------------
   |  1   |  2   |  3   |  -   |
   -----------------------------
   |  0   |  .   |  +   | Enter|
   -----------------------------
*/
typedef struct
{   unsigned char  event;
    unsigned char  value;
}   KEY_EVENT;

KEY_EVENT  EVENT_CHG_TAB[16] = 
{   {COMM_KBINPUT, SCANCODE_0},
    {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_PERIOD},            // 小數(shù)點(diǎn)       
    {COMM_KBINPUT, SCANCODE_KEYPADPLUS},        // 加號
    {COMM_KBINPUT, SCANCODE_ENTER},             // 回車
    {COMM_KBINPUT, SCANCODE_MINUS},             // 減號
    {COMM_KBINPUT, SCANCODE_KEYPADMULTIPLY},    // 乘法
    {COMM_KBINPUT, SCANCODE_SLASH}              // 減號      
};

	
/*
 * 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.
 */
// 查詢鍵盤或鼠標(biāo)事件
int comm_wait_for_input (void)
{	unsigned char  err;
    
    /* 等待按鍵/觸摸屏消息 */
    event_input = (TouchKey_Sta *) OSMboxPend(TouchKeyMbox, 0, &err);
      
    // 判斷是什么事件，然后返回相應(yīng)的值   
    if(err==OS_NO_ERR)
    {   if((event_input->sta&0x01) != 0)
        {   return(COMM_MOUSEINPUT);
        }        
        if((event_input->sta&0x02) != 0)
        {   return(COMM_KBINPUT);
        }
    }   
    return(0);
}

/*
 * Gets touchpanel position and button data.
 * x, y   : position values
 * button : Non-zero value means pen is down.
 */
// 該函數(shù)的返回值可以是IAL_MOUSE_LEFTBUTTON(表示左鍵按下)、
// IAL_MOUSE_RIGHTBUTTON(表示右鍵按下)等值"或"的結(jié)果。
// 取得鼠標(biāo)/觸摸屏的參數(shù)
int comm_ts_getdata (int *x, int *y, int *button)      
{   /* 根據(jù)觸摸按下或放開進(jìn)行相應(yīng)的處理 */
    if((event_input->sta&0x80) != 0)     // 觸摸按下
    {   *x = event_input->x;
        *y = event_input->y;
        *button = IAL_MOUSE_LEFTBUTTON;
    }       
    else    // 觸摸放開
    {   *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.
 */
// 取得按鍵的參數(shù)
int comm_kb_getdata (short *key, short *key_status)    
{   /* 根據(jù)按鍵按下或放開進(jìn)行相應(yīng)的處理 */
    if((event_input->sta&0x80) != 0)  // 按鍵按下
    {   *key = EVENT_CHG_TAB[event_input->key].value;
		*key_status = 1;                
    }       
    else    // 按鍵放開
    {   *key_status = 0;
    } // end of if((event_input.sta&0x80) != 0)...else... 			
    
    return(0);
}