基于ARM触摸屏的实现.doc

ucos II+ucGUI+s3c2410+LCD+触摸屏整合作者:佚名 来源:不详 录入:Admin 更新时间：2008-8-18 14:57:54 点击数：240 【字体： 】环境：ads2.2ARM9 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ARM9 s3c2410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 taskss TCB XX 二、ucGui 390移植到ARM9 s3c24101. 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 GPGCON |= (1 GPGDAT |= (1 LCDCON1 = (CLKVAL_TFT About 7 Mhz (EACH_FRAME 7) | /* 0 : Each Frame (3 5) | / TFT LCD Pannel (12 1) | /Y: / 16bpp Mode (0 LCDCON2=(VBPD24)|/*VBPD:(32-1)&0xff)=0x1f (LINEVAL_TFT 14) | /* LINEVAL_TFT : 480 - 1&bsp; (VFPD 6) | /* VFPD: (11-1)&0xff) = 0xa (VSPW LCDCON3=(HBPD19)|/*HBPD: (88-1)&0x7f) (HOZVAL_TFT 8) | /* HOZVAL_TFT : 800 - 1 (HFPD LCDCON4 = (MVAL 8) |/* MVAL : 13 (HSPWLCDCON5 = (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&bsp; (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 LCDSADDR1 = (FRAMEBUF_DMA_BASE 22) 1) LCDSADDR2=M5D( (FRAMEBUF_DMA_BASE+(LCD_XSIZE_TFT*LCD_YSIZE_TFT*2)1 ); s2410LCD-LCDSADDR3=(LCD_XSIZE_TFT-LCD_XSIZE_TFT)/1)LCDINTMSK|=(3); / MASK LCD Sub Interrupt s2410LCD-LPCSEL&=(7); / Disable LPC3600 s2410LCD-TPAL=0; / Disable Temp Palettes2410LCD-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&nbs; #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 12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 = (114)|(ADCPRS6)|(73)|(02)|(01)|(0); rADCTSC = (08)|(17)|(16)|(05)|(14)|(03)|(02)|(3); pISR_ADC = (U32)TSIrqISR; / rINTMSK &= (BIT_ADC); rINTSUBMSK &= (BIT_SUB_TC);2） 中断处理函数：static void TSIrqISR(void) int i; U32 Pt6; 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=(08)|(07)|(06)|(15)|(14)|(13)|(02)|(1); for(i=0;iLOOP;i+); /delay to set up the next channel for(i=0;i5;i+) /5 times rADCCON|=0x1; / Start X-position conversion while(rADCCON & 0x1); / Check if Enable_start is low while(!(0x8000&rADCCON); / Check ECFLG&nbs; Pti=(0x3ff&rADCDAT0); Pt5=(Pt0+Pt1+Pt2+Pt3+Pt4)/5;/多次采样取平均值 TX = Pt5; rADCTSC=(08)|(07)|(16)|(15)|(04)|(13)|(02)|(2); for(i=0;iLOOP;i+); /delay to set up the next channel for(i=0;i5;i+) /5 times rADCCON|=0x1; / Start Y-position conversion while(rADCCON & 0x1); / Check if Enable_start is low while(!(0x8000&rADCCON); / Check ECFLG Pti=(0x3ff&rADCDAT1); Pt5=(Pt0+Pt1+Pt2+Pt3+Pt4)/5;/ 多次采样取平均值 TY = Pt5;rADCTSC=(18)|(17)|(16)|(05)|(14)|(03)|(0pLCD_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(aBlock0)*GUI_MAXBLOCKS);/self aBlock0.Size = (1OSTCBPrio); 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y2、触摸屏校准任务（进程， 来自示例程序：TOUCH_Calibrate.c）：#if TOUCH_NEED_CALIBRATEstatic 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 screenn 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 hown a touch screen can ben calibrated at run time.n Please press the touchn 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 aPhysX2, aPhysY2, aLogX2, aLogY2, i;GUI_SetBkColor(GUI_WHITE);GUI_Clear();GUI_SetColor(GUI_BLACK);GUI_SetFont(&GUI_Font13B_ASCII);_Explain();/* Set the logical values */aLogX0 = 15;aLogY0 = 15;aLogX1 = LCD_GetXSize() - 20;aLogY1 = LCD_GetYSize() - 20;/* Get the physical values of the AD converter for 2 positions */for (i = 0; i 2; i+) _GetPhysValues(aLogXi, aLogYi, &aPhysXi, &aPhysYi, _acPosi);/* Use the physical values to calibrate the touch screen */GUI_TOUCH_Calibrate(0, aLogX0, aLogX1, aPhysX0, aPhysX1); /* Calibrate X-axis */GUI_TOUCH_Calibrate(1, aLogY0, aLogY1, aPhysY0, aPhysY1); /* 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(aLogX0, 4); GUI_DispNextLine(); GUI_DispString (lcdx1: ); GUI_DispDec(aLogX1, 4); GUI_DispNextLine(); GUI_DispString (lcdy0: ); GUI_DispDec(aLogY0, 4); GUI_DispNextLine(); GUI_DispString (lcdy1: ); GUI_DispDec(aLogY1, 4); GUI_DispNextLine(); GUI_DispString (tscX0: ); GUI_DispDec(aPhysX0, 4); GUI_DispNextLine(); GUI_DispString (tscX1: ); GUI_DispDec(aPhysX1, 4); GUI_DispNextLine(); GUI_DispString (tscY0: ); GUI_DispDec(aPhysY0, 4); GUI_DispNextLine(); GUI_DispString (tscY1: ); GUI_DispDec(aPhysY1, 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 */