[置顶] Ucos-II+ucGUI390+ARM2410+LCD＋触摸屏基本整合成功(更新于2007-3-15)

 

 

ucos-II+ucGUI390+ARM9s3c2410+LCD ＋触摸屏基本整合成功

(最近更新于2007-3-15)

 

环境： ads2.2 ＋ ARM9 ＋ s3c2410

 

注意：由于编译器（ ads1.2 或 2.2 ）对全局变量初始化为 0 的不完全支持，有时必须手动初始化为 0 ，切记！！！

 

一、     ucos-II 移植到 ARM9s3c2410

可从官网下载移植代码，基本无需改动。

在os_cpu_a.s中的函数UCOS_IRQHandler中的bl OSIntEnter和bl C_IRQHandler之间插入如下代码（ 见邵贝贝，第 2 版，第 104 页的说明： L3.18(4) ）：

        ldr r0, =OSIntNesting

        ldrb r0,[r0]

        cmp r0,#1

        bne XX

        ldr r0,=OSTCBCur

        ldr r1,[r0]

        str sp,[r1]                 ; store sp in preempted tasks's TCB       

             

XX 

 

二、     ucGui390 移植到 ARM9s3c2410 ：

1. Lcd 驱动：

1） 画点函数：

对dm2410实验板上的lcd，左上为原点（0，0），函数如下：

void LCD2410_SetPixel(int xp, int yp, U16 color, int dindex)

{

       *(pLCDBuffer565 + SCREEN_WIDTH*yp + xp) = color; 

}

为了达到更快的显示速度，别忘了开启Cache ！！！

2）LCD控制器的初始化，对2410函数如下：

int LCD2410_Init(void)

{

       if(!isLcdInit)

       {

              InitLcdPort();

              InitLcdRegs();             

              isLcdInit = 1;

              return 0;

       }

       return 1;

}

 

void InitLcdPort(void)

{

 

    // LCD port initialize.

    s2410IOP->GPCUP = 0xFFFFFFFF;

    s2410IOP->GPCCON = 0xAAAAAAAA;

    s2410IOP->GPDUP = 0xFFFFFFFF;

    s2410IOP->GPDCON = 0xAAAAAAAA;

    s2410IOP->GPGCON &= ~(3 << 8);                 /* Set LCD_PWREN as output                          */

    s2410IOP->GPGCON |= (1 << 8);

    s2410IOP->GPGDAT |= (1 << 4);                 //* Backlight ON   

}

void InitLcdRegs(void)

{

       s2410LCD->LCDCON1   =   (CLKVAL_TFT << 8) |   //* VCLK = HCLK / ((CLKVAL + 1) * 2) -> About 7 Mhz 

                            (EACH_FRAME << 7) |   //* 0 : Each Frame                                  

                            (3           << 5) |   // TFT LCD Pannel                                  

                            (12          << 1) |   //Y: // 16bpp Mode                                     

                            (0           << 0) ;   // Disable LCD Output                            

    s2410LCD->LCDCON2   =   (VBPD        << 24) |   //* VBPD          : ((32-1)&0xff) = 0x1f                            

                            (LINEVAL_TFT << 14) |   //* LINEVAL_TFT : 480 - 1                          

                            (VFPD        << 6) |   //* VFPD          : ((11-1)&0xff) = 0xa                           

                            (VSPW        << 0) ;   //* VSPW          : ((2-1) &0x3f) = 0x1                          

    s2410LCD->LCDCON3   =   (HBPD        << 19) |   //* HBPD          : ((88-1)&0x7f)                             

                            (HOZVAL_TFT << 8) |   //* HOZVAL_TFT    : 800 - 1                         

                            (HFPD        << 0) ;   //* HFPD          : ((40-1)&0xff)                             

    s2410LCD->LCDCON4    =   (MVAL        << 8) |   //* MVAL          : 13                             

                            (HSPW        << 0) ;   //* HSPW          : ((128-1)&0xff)                             

    s2410LCD->LCDCON5   =   (0           << 12) |   // BPP24BL       : LSB valid                       

                            (1           << 11) |   // FRM565 MODE   : 5:5:5:1 Format                    

                            (0           << 10) |   // INVVCLK       : VCLK Falling Edge               

                            (1           << 9) |   // INVVLINE      : Inverted Polarity               

                            (1           << 8) |   // INVVFRAME     : Inverted Polarity               

                            (0           << 7) |   // INVVD         : Normal                          

                            (0           << 6) |   // INVVDEN       : Normal                           

                            (0           << 5) |   // INVPWREN      : Normal                         

                            (0           << 4) |   // INVENDLINE    : Normal                          

                            (1           << 3) |   // PWREN         : Disable PWREN                   

                            (0           << 2) |   // ENLEND        : Disable LEND signal             

                            (0           << 1) |   // BSWP          : Swap Disable                    

                            (1           << 0) ;   // HWSWP         : Swap Enable                     

    s2410LCD->LCDSADDR1 = ((FRAMEBUF_DMA_BASE >> 22)     << 21) |

                           ((M5D(FRAMEBUF_DMA_BASE >> 1)) << 0);

    s2410LCD->LCDSADDR2=M5D( (FRAMEBUF_DMA_BASE+(LCD_XSIZE_TFT*LCD_YSIZE_TFT*2))>>1 );

    s2410LCD->LCDSADDR3=(((LCD_XSIZE_TFT-LCD_XSIZE_TFT)/1)<<11)|(LCD_XSIZE_TFT/1);

    s2410LCD->LCDINTMSK|=(3); // MASK LCD Sub Interrupt

    s2410LCD->LPCSEL&=(~7); // Disable LPC3600

    s2410LCD->TPAL=0; // Disable Temp Palette

              s2410LCD->LCDCON1 |= 1;      

}

 

其中，部分变量、常量定义如下：

 

#define LCD_XSIZE_TFT        (800)    

#define LCD_YSIZE_TFT        (480)

#define HOZVAL_TFT           (LCD_XSIZE_TFT-1)

#define LINEVAL_TFT          (LCD_YSIZE_TFT-1)

#define MVAL                 (13)

#define MVAL_USED            (1)

#define EACH_FRAME                 (0)

//STN/CSTN timing parameter for LCBHBT161M(NANYA)

#define WLH                  (3)

#define WDLY                 (3)

#define LINEBLANK            (1 &0xff)

#define VBPD                 ((32-1)&0xff)

#define VFPD                 ((11-1)&0xff)

#define VSPW                 ((2-1) &0x3f)

#define HBPD                 ((88-1)&0x7f)

#define HFPD                 ((40-1)&0xff)

#define HSPW                 ((128-1)&0xff)

#define CLKVAL_TFT           (0)  

#define M5D(n)               ((n) & 0x1fffff)

#define SCREEN_WIDTH 800 //800

#define SCREEN_HEIGHT 480 //480

#define FRAMEBUF_DMA_BASE                (0x35000000)

U16* pLCDBuffer565=(U16*)FRAMEBUF_DMA_BASE;

 

3）填写配置文件 LCDConf.h

       #define LCD_XSIZE      (800)   /* X-resolution of LCD, Logical coor. */

#define LCD_YSIZE       (480)   /* Y-resolution of LCD, Logical coor. */

#define LCD_BITSPERPIXEL (16)

#define LCD_CONTROLLER 1

#define LCD_SWAP_RB_0  1

 

2 ．触摸屏驱动：

       触摸屏驱动计算出触摸屏的坐标（x，y），对dm2410实验板上的触摸屏，左下为原点，但不一定是（0，0）。两个函数：

1） 设置中断向量，开中断：

void SetTSInterrupt(void)

{

    rADCDLY = (50000);

    rADCCON = (1<<14)|(ADCPRS<<6)|(7<<3)|(0<<2)|(0<<1)|(0);

      rADCTSC = (0<<8)|(1<<7)|(1<<6)|(0<<5)|(1<<4)|(0<<3)|(0<<2)|(3);

    pISR_ADC = (U32)TSIrqISR; //¶¨ÒåÖжÏÏìÓ¦º¯Êý

    rINTMSK &= ~(BIT_ADC);

    rINTSUBMSK &= ~(BIT_SUB_TC);

}

2） 中断处理函数：

static void TSIrqISR(void)

{

    int i;

    U32 Pt[6];

    rINTSUBMSK |= (BIT_SUB_ADC|BIT_SUB_TC); 

     if(rADCDAT0 & 0x8000)

    {//抬起

        isDown = 0;

        rADCTSC &= 0xff;    // Set stylus down interrupt

        TX = -1;

        TY = -1; // 抬起触笔时， TX,TY 要值成不大于 0 的数

    }

    else //按下

    {          isDown = 1;

        rADCTSC=(0<<8)|(0<<7)|(0<<6)|(1<<5)|(1<<4)|(1<<3)|(0<<2)|(1);

        for(i=0;i<LOOP;i++);            //delay to set up the next channel

        for(i=0;i<5;i++)                           //5 times

        {

               rADCCON|=0x1;               // Start X-position conversion

            while(rADCCON & 0x1);       // Check if Enable_start is low

            while(!(0x8000&rADCCON));   // Check ECFLG

                     Pt[i]=(0x3ff&rADCDAT0);

        }

        Pt[5]=(Pt[0]+Pt[1]+Pt[2]+Pt[3]+Pt[4])/5;//多次采样取平均值

        TX = Pt[5];

        rADCTSC=(0<<8)|(0<<7)|(1<<6)|(1<<5)|(0<<4)|(1<<3)|(0<<2)|(2);

        for(i=0;i<LOOP;i++);            //delay to set up the next channel

        for(i=0;i<5;i++)                           //5 times

        {

            rADCCON|=0x1;               // Start Y-position conversion

            while(rADCCON & 0x1);       // Check if Enable_start is low

            while(!(0x8000&rADCCON));   // Check ECFLG

            Pt[i]=(0x3ff&rADCDAT1);

        }

        Pt[5]=(Pt[0]+Pt[1]+Pt[2]+Pt[3]+Pt[4])/5;// 多次采样取平均值

 

        TY = Pt[5];

               rADCTSC=(1<<8)|(1<<7)|(1<<6)|(0<<5)|(1<<4)|(0<<3)|(0<<2)|(3);

}

    //cprintf("%d,%d/n",TX,TY);

       OSMboxPost(TouchMbox, 0);//向处理触摸进程发消息

    rSUBSRCPND |= BIT_SUB_TC;

    rINTSUBMSK &= ~(BIT_SUB_TC);         // Unmask sub interrupt (TC)    

    ClearPending(BIT_ADC);    

}

3） 需要的量：

#define LOOP 1

#define ADCPRS 0x27

int TX=0;//触摸坐标x

int TY=0;//触摸坐标y

extern OS_EVENT *TouchMbox;

int isDown;

 

4） 触摸屏校准：

Ucgui390中，带有一校准程序（于 TOUCH_Calibrate.c中），可以改写为我所用（见下文）。

也可设置默认值，测出左下最小坐标minX，minY和右上最大坐标maxX，maxY，注意是触摸坐标，不是lcd坐标，如下填写配置文件 GUITouchConf.h:

#define GUI_TOUCH_AD_LEFT    minX

#define GUI_TOUCH_AD_TOP     maxY

#define GUI_TOUCH_AD_RIGHT maxX

#define GUI_TOUCH_AD_BOTTOM minY   

#define GUI_TOUCH_SWAP_XY    0 

 #define GUI_TOUCH_MIRROR_X    1

#define GUI_TOUCH_MIRROR_Y 1

#define TOUCH_NEED_CALIBRATE 0

 

3 、如下填写 GUIConf.h ：

       #define GUI_OS                    (1) /* Compile with multitasking support */

#define GUI_SUPPORT_TOUCH          (1) /* Support a touch screen (req. win-manager) */

#define GUI_SUPPORT_UNICODE        (1) /* Support mixed ASCII/UNICODE strings */

#define GUI_SUPPORT_CHINESE               (1)

#define GUI_DEFAULT_FONT           &GUI_Font6x8

#define GUI_ALLOC_SIZE             12500 /* Size of dynamic memory ... For WM and memory devices*/

#define GUI_WINSUPPORT             1 /* Window manager package available */

#define GUI_SUPPORT_MEMDEV         1 /* Memory devices available */

#define GUI_SUPPORT_AA             1 /* Anti aliasing available */

 

4 、ucgui 与lcd 驱动函数的连接，即修改LCDWin.c 文件：

       在LCDWin.c中，去掉无用的头文件包含。

#define SETPIXEL(x, y, c)   LCD2410_SetPixel(x, y, c, LCD_DISPLAY_INDEX)

#define GETPIXEL(x, y)     LCD2410_GetPixel(x,y, LCD_DISPLAY_INDEX)

即将“LCDSIM_XX”改成“LCD2410_XX”，这两个函数位于lcd驱动文件中。

       ……………………………

 #define SETPIXEL(x, y, c) /

    if (!_CheckBound(c)) { /

      LCD2410_SetPixel(x, y, c, LCD_DISPLAY_INDEX); /

    }

#else

 #define SETPIXEL(x, y, c) LCD2410_SetPixel(x, y, c, LCD_DISPLAY_INDEX)

#endif

#define GETPIXEL(x, y)    LCD2410_GetPixel(x,y,LCD_DISPLAY_INDEX)

……………………………

static void _XorPixel(int x, int y) {

 unsigned int Index = LCD_L0_GetPixelIndex(x,y);

   LCD2410_SetPixel(x, y, LCD_NUM_COLORS-1-Index, LCD_DISPLAY_INDEX);

}

……………………………

int LCD_L0_Init(void) {

    return LCD2410_Init();//调用lcd初始化函数

}

 

5 、某些编译器( 如：ads1.2) 不会初始化全局变量，因此做如下事：

1) 修改如下函数为：（位于 GUICore.c）

static void _InitContext(GUI_CONTEXT* pContext) {

   

    memset(pContext,0,sizeof(GUI_CONTEXT)) ； //add

   

 #if GUI_SUPPORT_MEMDEV

    GUI_SelectLCD();

 #else

    LCD_SetClipRectMax();//LCD_L0_GetRect

 #endif

      pContext->pLCD_HL      = &LCD_HL_APIList;

      pContext->pAFont       = GUI_DEFAULT_FONT;

        pContext->pClipRect_HL = &GUI_Context.ClipRect;

      pContext->PenSize      = 1;

       pContext->DrawMode = GUI_DRAWMODE_NORMAL;//add

     pContext->TextMode = GUI_TEXTMODE_NORMAL;//add

     pContext->TextAlign = GUI_TA_LEFT|GUI_TA_TOP;//add

    pContext->AA_HiResEnable = 0;//add

    /* Variables in WM module */

        #if GUI_WINSUPPORT

           pContext->hAWin    = WM_GetDesktopWindow();

      #endif

      /* Variables in GUI_AA module */

      pContext->AA_Factor = 3;

      LCD_SetBkColor(GUI_DEFAULT_BKCOLOR);

      LCD_SetColor(GUI_DEFAULT_COLOR);

}

 

修改如下函数为：（位于 GUIAlloc.c）

void GUI_ALLOC_Init(void) {

........

      GUI_ALLOC.NumUsedBytes = 0;

    memset(&aBlock,0,sizeof(aBlock[0])*GUI_MAXBLOCKS);/////self

    aBlock[0].Size = (1<<GUI_BLOCK_ALIGN); /* occupy minimum for a block */

.......

}

 

 

修改如下函数为：（位于 WM.c）（―――――――――― New）

void WM_Init(void) {

       if (!_IsInited) {

       ……….

       memset(&_ClipContext,0,sizeof(WM_IVR_CONTEXT));//add

       NextDrawWin = WM__FirstWin = WM_HWIN_NULL;

        ……………….

    _IsInited =1;

       }

}

2)自己编写如下函数(ads1.2)：

void MyInit()

{

        IsInitialized = 0;//MemDev

      _IsInited = 0;//Win

      WM__CreateFlags = 0;

   GUI_CURSOR_pfTempHide = NULL;

 GUI_Context.hDevData = 0;

   WM__hCapture=0;

 WM__hWinFocus=0;

   WM_pfPollPID = 0;

 WM_pfHandlePID = 0;

   GUI_pfTimerExec = 0;

   _KeyMsgCnt = 0;

}

该函数应在 GUI_Init() 调用之前调用。

 

6 、改写GUI_Init() 函数：

int GUI_Init(void) {

 int r;

 GUI_DEBUG_LOG("/nGUI_Init()");

 /* Init system wide globals first */

 GUI_DecChar = '.';

 

 /* Init context */

 _InitContext(&GUI_Context);

 GUITASK_INIT();

 r = LCD_Init();

 #if GUI_WINSUPPORT

    WM_Init();

 #endif

 GUITASK_COPY_CONTEXT();

 GUI_Clear();

   GUI_X_Init();

 GUI_CURSOR_Show();// 启动即显示鼠标

 return r;

}

 

三、 ucGUI 与 ucOS 的整合，主要修改 GUI_X.c 文件：

       1 、定义信号量及全局量：

              static OS_EVENT *DispSem;

static OS_EVENT *EventMbox;

static OS_EVENT *KeySem;

static int         KeyPressed;

static char        KeyIsInited;

       2 、实现结合函数：

              int GUI_X_GetTime(void)

{

 return ((int)OSTimeGet());

}

void GUI_X_Delay(int period)

{

    INT32U ticks;

    ticks = (period * 1000) / OS_TICKS_PER_SEC;

    OSTimeDly((INT16U)ticks);

}

void GUI_X_Unlock(void)

{

    OSSemPost(DispSem);

}

void GUI_X_Lock(void)

{

     U8 err;

     OSSemPend(DispSem, 0, &err);

}

U32 GUI_X_GetTaskId(void)

{

  return ((U32)(OSTCBCur->OSTCBPrio));

}

void GUI_X_WaitEvent (void)

{

    INT8U err;

    (void)OSMboxPend(EventMbox, 0, &err);

}

void GUI_X_SignalEvent (void)

{

    (void)OSMboxPost(EventMbox, (void *)1);

}

void GUI_X_InitOS(void)

{

    DispSem   = OSSemCreate(1);

    EventMbox = OSMboxCreate((void *)0);

}

void GUI_X_ExecIdle(void) {GUI_X_Delay(1);}

 

void GUI_X_Init(void) {

    SetTSInterrupt();// 此处接入触摸屏的中断设置

    GUI_TOUCH_SetDefaultCalibration();// 用默认值校准触摸屏

}

 

四、     与触摸屏有关的函数：

1 、4 个功能函数：

void GUI_TOUCH_X_ActivateX(void) {//空}   

void GUI_TOUCH_X_ActivateY(void) {//空}

int  GUI_TOUCH_X_MeasureX(void) {

    return TX;//返回触摸坐标x

}   

int  GUI_TOUCH_X_MeasureY(void){

    return TY; //返回触摸坐标y

}

 

2 、触摸屏校准任务（进程， 来自示例程序：TOUCH_Calibrate.c ）：

#if TOUCH_NEED_CALIBRATE

static const char * _acPos[] = {

 "(upper left position)",

 "(lower right position)"

};

static void _WaitForPressedState(int Pressed) {

 GUI_PID_STATE State;

 /* Wait until touch is pressed */

 do {

    GUI_TOUCH_GetState(&State);

    if (State.Pressed == Pressed) {

      break;

    }

    GUI_Delay (100);

 } while (1);

}

static void _DispStringCentered(const char * pString) {

 GUI_RECT Rect;

 Rect.x0 = Rect.y0 = 0;

 Rect.x1 = LCD_GetXSize() - 1;

 Rect.y1 = LCD_GetYSize() - 1;

 GUI_DispStringInRect(pString, &Rect, GUI_TA_HCENTER | GUI_TA_VCENTER);

}

static void _GetPhysValues(int LogX, int LogY, int * pPhysX, int * pPhysY, const char * pString) {

 char acText[] = "Press here";

 GUI_RECT Rect;

 int FontSizeY, Align;

 FontSizeY = GUI_GetFontSizeY();

 GUI_Clear();

 GUI_SetColor(GUI_BLACK);

 _DispStringCentered("Runtime calibration,/n"

                      "please touch the screen/n"

                      "at the center of the ring."); /* Ask user to press the touch */

 /* Calculate the rectangle for the string */

 Rect.y0 = LogY - FontSizeY;

 Rect.y1 = LogY + FontSizeY;

 if (LogX < LCD_GetXSize() / 2) {

    Rect.x0 = LogX + 15;

    Rect.x1 = LCD_GetXSize();

    Align = GUI_TA_LEFT;

 } else {

    Rect.x0 = 0;

    Rect.x1 = LogX - 15;

    Align = GUI_TA_RIGHT;

 }

 /* Show the text nearby the ring */

 GUI_DispStringInRect(acText, &Rect, Align | GUI_TA_TOP);

 GUI_DispStringInRect(pString, &Rect, Align | GUI_TA_BOTTOM);

 /* Draw the ring */

 GUI_FillCircle(LogX, LogY, 10);

 GUI_SetColor(GUI_WHITE);

 GUI_FillCircle(LogX, LogY, 5);

 GUI_SetColor(GUI_BLACK);

 /* Wait until touch is pressed */

 _WaitForPressedState(1);

 *pPhysX = GUI_TOUCH_GetxPhys();

 *pPhysY = GUI_TOUCH_GetyPhys();

 /* Wait until touch is released */

 _WaitForPressedState(0);

}

 

static void _Explain(void) {

 _DispStringCentered("This sample shows how/n"

                      "a touch screen can be/n"

                      "calibrated at run time./n"

                      "Please press the touch/n"

                      "screen to continue...");

 GUI_DispStringHCenterAt("TOUCH_Calibrate", LCD_GetXSize() / 2, 5);

 _WaitForPressedState(1);

 _WaitForPressedState(0);

}

 

void CalibrateTask(void* pdata) { // 触摸屏校准任务入口

 int aPhysX[2], aPhysY[2], aLogX[2], aLogY[2], i;

 GUI_SetBkColor(GUI_WHITE);

 GUI_Clear();

 GUI_SetColor(GUI_BLACK);

 GUI_SetFont(&GUI_Font13B_ASCII);

 _Explain();

 /* Set the logical values */

 aLogX[0] = 15;

 aLogY[0] = 15;

 aLogX[1] = LCD_GetXSize() - 20;

 aLogY[1] = LCD_GetYSize() - 20;

 /* Get the physical values of the AD converter for 2 positions */

 for (i = 0; i < 2; i++) {

    _GetPhysValues(aLogX[i], aLogY[i], &aPhysX[i], &aPhysY[i], _acPos[i]);

 }

 /* Use the physical values to calibrate the touch screen */

 GUI_TOUCH_Calibrate(0, aLogX[0], aLogX[1], aPhysX[0], aPhysX[1]); /* Calibrate X-axis */

 GUI_TOUCH_Calibrate(1, aLogY[0], aLogY[1], aPhysY[0], aPhysY[1]); /* Calibrate Y-axis */

 

 { /* calculate and display values for configuration file */

    int calX0, calX1;

    int calY0, calY1;

    GUI_Clear();

   

    GUI_TOUCH_GetCalData(GUI_COORD_X, &calX0, &calX1);

    GUI_TOUCH_GetCalData(GUI_COORD_Y, &calY0, &calY1);

   

    GUI_DispStringAt("calX0: ", 0, 0); GUI_DispDec(calX0, 4); GUI_DispNextLine();

    GUI_DispString ("calX1: ");       GUI_DispDec(calX1, 4); GUI_DispNextLine();

    GUI_DispString ("calY0: ");       GUI_DispDec(calY0, 4); GUI_DispNextLine();

    GUI_DispString ("calY1: ");       GUI_DispDec(calY1, 4);

     

    GUI_DispStringAt("lcdx0: ", 0, 200); GUI_DispDec(aLogX[0], 4); GUI_DispNextLine();

    GUI_DispString ("lcdx1: ");       GUI_DispDec(aLogX[1], 4); GUI_DispNextLine();

    GUI_DispString ("lcdy0: ");       GUI_DispDec(aLogY[0], 4); GUI_DispNextLine();

    GUI_DispString ("lcdy1: ");       GUI_DispDec(aLogY[1], 4); GUI_DispNextLine();

   

    GUI_DispString ("tscX0: ");       GUI_DispDec(aPhysX[0], 4); GUI_DispNextLine();

    GUI_DispString ("tscX1: ");       GUI_DispDec(aPhysX[1], 4); GUI_DispNextLine();

    GUI_DispString ("tscY0: ");       GUI_DispDec(aPhysY[0], 4); GUI_DispNextLine();

    GUI_DispString ("tscY1: ");       GUI_DispDec(aPhysY[1], 4); GUI_DispNextLine();

   

    GUI_DispString ("Please touch display to continue...");

    GUI_Delay(1000);

   

    _WaitForPressedState(1);

    _WaitForPressedState(0);

 } 

 GUI_Clear();      

 SystemOn();

 OSTaskSuspend(OS_PRIO_SELF);

 

}

3 、为了响应触摸屏，做如下事：

       1）创建进程处理触摸事件，形式如下：

              void TouchTask(void* data) {

              INT8U err;

              while(1)

              {

                     CONSOL_Printf("Waiting for Touch....../n");

OSMboxPend(TouchMbox, 0, &err); /* Acquire semaphore to perform random numbers */

                     CONSOL_Printf("Got a message/n");

                     GUI_TOUCH_Exec();//

                     }

}

2) 如下修改函数 GUI_TOUCH_Exec()：

void GUI_TOUCH_Exec(void) {

 #ifndef WIN32

 static U8 ReadState;

 int x,y;

 /* calculate Min / Max values */

 if (xyMinMax[GUI_COORD_X].Min < xyMinMax[GUI_COORD_X].Max) {

    xMin = xyMinMax[GUI_COORD_X].Min;

    xMax = xyMinMax[GUI_COORD_X].Max;

 } else {

    xMax = xyMinMax[GUI_COORD_X].Min;

    xMin = xyMinMax[GUI_COORD_X].Max;

 }

 if (xyMinMax[GUI_COORD_Y].Min < xyMinMax[GUI_COORD_Y].Max) {

    yMin = xyMinMax[GUI_COORD_Y].Min;

    yMax = xyMinMax[GUI_COORD_Y].Max;

 } else {

    yMax = xyMinMax[GUI_COORD_Y].Min;

    yMin = xyMinMax[GUI_COORD_Y].Max;

 }

  /* Execute the state machine which reads the touch */

  // switch (ReadState) {

 //case 0:

    yPhys = TOUCH_X_MeasureY();

   // TOUCH_X_ActivateY(); /* Prepare X- measurement */

 // ReadState++;

 // break;

 //default:

    xPhys = TOUCH_X_MeasureX();

  // TOUCH_X_ActivateX(); /* Prepare Y- measurement */

    /* Convert values into logical values */

      #if !GUI_TOUCH_SWAP_XY   /* Is X/Y swapped ? */

        x = xPhys;

        y = yPhys;

      #else

        x = yPhys;

        y = xPhys;

      #endif

 

    if ((x <xMin) | (x>xMax) | (y <yMin) | (y>yMax)) {

      GUI_TOUCH_StoreUnstable(-1,-1);

    } else {

      x = AD2X(x);

      y = AD2Y(y);

      GUI_TOUCH_StoreUnstable(x,y);

    }

    /* Reset state machine */

    //ReadState=0;

  // break;

 //}

 #endif /* WIN32 */

}

 

五、     GUI 多任务测试：

测试程序：MT_MultiTasking.c

 

程序下载：http://album.hi.csdn.net/App_Uploads/yhmhappy2006/20080918/085541387.jpg

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