/******************************************************************************
*																			  *
* \brief  Shows the status string on the color STN display.                   *
*																			  *
* \param psContext is a pointer to the graphics context representing the      *
*        display.                                                             *
*																		      *
* \param pcStatus is a pointer to the string to be shown.                     *
*																		      *
* \return none.                                                               *
*                                                                             *
******************************************************************************/
void DisplayStatus(tContext *psContext, char *pcStatus)
{
    tRectangle rectLine;
    int lY;

    /* Calculate the Y coordinate of the top left of the character cell
       for our line of text.
    */
    lY = (GrContextDpyHeightGet(psContext) / 8) -
         (GrFontHeightGet(TEXT_FONT) / 2);

    /* Determine the bounding rectangle for this line of text. We add 4 pixels
       to the height just to ensure that we clear a couple of pixels above and
       below the line of text.
    */
    rectLine.sXMin = 0;
    rectLine.sXMax = GrContextDpyWidthGet(psContext) - 1;
    rectLine.sYMin = lY;
    rectLine.sYMax = lY + GrFontHeightGet(TEXT_FONT) + 3;

    /* Clear the line with black. */
    
    GrContextForegroundSet(&g_sContext, ClrBlack);
    GrRectFill(psContext, &rectLine);
    
    /* Draw the new status string */
    
    GrContextForegroundSet(&g_sContext, ClrWhite);
    GrStringDrawCentered(psContext, pcStatus, -1,
                         GrContextDpyWidthGet(psContext) / 2,
                         GrContextDpyHeightGet(psContext) / 8 , false);
}

//*****************************************************************************
//
// The touch screen driver calls this function to report all state changes.
//
//*****************************************************************************
static long
WatchdogTouchCallback(unsigned long ulMessage, long lX,  long lY)
{
    //
    // If the screen is tapped, we will receive a PTR_DOWN then a PTR_UP
    // message. We pick one (pretty much at random) to use as the trigger to
    // stop feeding the watchdog.
    //
    if(ulMessage == WIDGET_MSG_PTR_UP)
    {
        //
        // Let the user know that the tap has been registered and that the
        // watchdog is being starved.
        //
        GrContextFontSet(&g_sContext, g_pFontCmss20);
        GrStringDrawCentered(&g_sContext, "Watchdog is not being fed!", -1,
                             GrContextDpyWidthGet(&g_sContext) / 2 ,
                             (GrContextDpyHeightGet(&g_sContext) / 2), 1);
        GrContextFontSet(&g_sContext, g_pFontCmss14);
        GrStringDrawCentered(&g_sContext,
                             "           System will reset shortly.           ",
                             -1, GrContextDpyWidthGet(&g_sContext) / 2 ,
                             (GrContextDpyHeightGet(&g_sContext) / 2) + 20, 1);

        //
        // Set the flag that tells the interrupt handler not to clear the
        // watchdog interrupt.
        //
        g_bFeedWatchdog = false;
    }

    return(0);
}

//*****************************************************************************
//
// The touch screen driver calls this function to report all state changes.
//
//*****************************************************************************
static int32_t
WatchdogTouchCallback(uint32_t ui32Message, int32_t i32X, int32_t i32Y)
{
    //
    // If the screen is tapped, we will receive a PTR_DOWN then a PTR_UP
    // message.  Use PTR_UP as the trigger to stop feeding the watchdog.
    //
    if(ui32Message == WIDGET_MSG_PTR_UP)
    {
        //
        // See if the left or right side of the screen was touched.
        //
        if(i32X <= (GrContextDpyWidthGet(&g_sContext) / 2))
        {
            //
            // Let the user know that the tap has been registered and that the
            // watchdog0 is being starved.
            //
            GrContextFontSet(&g_sContext, g_psFontCmss20);
            GrContextForegroundSet(&g_sContext, ClrRed);
            GrStringDrawCentered(&g_sContext,
                                 "Watchdog 0 starved, reset shortly", -1,
                                 GrContextDpyWidthGet(&g_sContext) / 2 ,
                                 (GrContextDpyHeightGet(&g_sContext) / 2) + 40,
                                 1);
            GrContextForegroundSet(&g_sContext, ClrWhite);

            //
            // Set the flag that tells the interrupt handler not to clear the
            // watchdog0 interrupt.
            //
            g_bFeedWatchdog0 = false;
        }
        else
        {
            //
            // Let the user know that the tap has been registered and that the
            // watchdog1 is being starved.
            //
            GrContextFontSet(&g_sContext, g_psFontCmss20);
            GrContextForegroundSet(&g_sContext, ClrRed);
            GrStringDrawCentered(&g_sContext,
                                 "Watchdog 1 starved, reset shortly", -1,
                                 GrContextDpyWidthGet(&g_sContext) / 2 ,
                                 (GrContextDpyHeightGet(&g_sContext) / 2) + 60,
                                 1);
            GrContextForegroundSet(&g_sContext, ClrWhite);

            //
            // Set the flag that tells the interrupt handler not to clear the
            // watchdog1 interrupt.
            //
            g_bFeedWatchdog1 = false;
        }
    }

    return(0);
}

//*****************************************************************************
//
// Shows the status string on the color STN display.
//
// \param psContext is a pointer to the graphics context representing the
// display.
// \param pcStatus is a pointer to the string to be shown.
//
// This implementation assumes we are using a 6 pixel wide font, giving us
// space for 16 characters across the display.
//
//*****************************************************************************
void
DisplayStatus(tContext *psContext, char *pcStatus)
{
    tRectangle sRectLine;

    //
    // Determine the bounding rectangle for this line of text.
    //
    sRectLine.i16XMin = 0;
    sRectLine.i16XMax = GrContextDpyWidthGet(psContext) - 1;
    sRectLine.i16YMin = GrContextDpyHeightGet(psContext) - (TEXT_HEIGHT + 2);
    sRectLine.i16YMax = sRectLine.i16YMin + GrFontHeightGet(TEXT_FONT) + 1;

    //
    // Clear the line with black.
    //
    GrContextForegroundSet(&g_sContext, ClrBlack);
    GrRectFill(psContext, &sRectLine);

    //
    // Draw the new status string
    //
    GrContextForegroundSet(&g_sContext, ClrWhite);
    GrStringDrawCentered(psContext, pcStatus, -1,
                         GrContextDpyWidthGet(psContext) / 2,
                         sRectLine.i16YMin + (TEXT_HEIGHT / 2), false);
}

//*****************************************************************************
//
// This hook is called by FreeRTOS when an stack overflow error is detected.
//
//*****************************************************************************
void
vApplicationStackOverflowHook(xTaskHandle *pxTask, signed char *pcTaskName)
{
    tContext sContext;

    //
    // A fatal FreeRTOS error was detected, so display an error message.
    //
    GrContextInit(&sContext, &g_sKentec320x240x16_SSD2119);
    GrContextForegroundSet(&sContext, ClrRed);
    GrContextBackgroundSet(&sContext, ClrBlack);
    GrContextFontSet(&sContext, g_psFontCm20);
    GrStringDrawCentered(&sContext, "Fatal FreeRTOS error!", -1,
                         GrContextDpyWidthGet(&sContext) / 2,
                         (((GrContextDpyHeightGet(&sContext) - 24) / 2) +
                          24), 1);

    //
    // This function can not return, so loop forever.  Interrupts are disabled
    // on entry to this function, so no processor interrupts will interrupt
    // this loop.
    //
    while(1)
    {
    }
}

//*****************************************************************************
//
// This hook is called by SafeRTOS when an error is detected.
//
//*****************************************************************************
static void
SafeRTOSErrorHook(xTaskHandle xHandleOfTaskWithError,
                  signed portCHAR *pcNameOfTaskWithError,
                  portBASE_TYPE xErrorCode)
{
    tContext sContext;

    //
    // A fatal SafeRTOS error was detected, so display an error message.
    //
    GrContextInit(&sContext, &g_sKitronix320x240x16_SSD2119);
    GrContextForegroundSet(&sContext, ClrRed);
    GrContextBackgroundSet(&sContext, ClrBlack);
    GrContextFontSet(&sContext, g_pFontCm20);
    GrStringDrawCentered(&sContext, "Fatal SafeRTOS error!", -1,
                         GrContextDpyWidthGet(&sContext) / 2,
                         (((GrContextDpyHeightGet(&sContext) - 24) / 2) +
                          24), 1);

    //
    // This function can not return, so loop forever.  Interrupts are disabled
    // on entry to this function, so no processor interrupts will interrupt
    // this loop.
    //
    while(1)
    {
    }
}

void Timer1IntHandler(void)
{
	//debugled(10);
    ROM_TimerIntClear(TIMER1_BASE, TIMER_TIMA_TIMEOUT);

    //debugled(3);
    int angle=0;
    if(max2>0 && max1>0 && abs(maxi1-maxi2)<PULSE_SAMPLE)
    {
    //float dt=abs(maxi1-maxi2)/SAMPLING_FREQUENCY;
    //angle=asin(dt*lambda/distance)*180/3.1412;
    angle=abs(maxi1-maxi2);
    }
    //debugled(3);
    acount++;
    //rcount=0;
    //ROM_IntMasterDisable();

	snprintf(text,sizeof(text),"%3ld,%3ld",rcount,g_ulADCCount);


    GrContextForegroundSet(&sDisplayContext, ClrDarkBlue);
    GrRectFill(&sDisplayContext, &sRect1);
    GrContextForegroundSet(&sDisplayContext, ClrWhite);
    //GrRectDraw(&sDisplayContext, &sRect1);
    GrContextFontSet(&sDisplayContext, g_pFontCm12);
    GrStringDrawCentered(&sDisplayContext,text, -1,
                         GrContextDpyWidthGet(&sDisplayContext) / 2, 10, 0);

    GrContextForegroundSet(&sDisplayContext, ClrDarkBlue);
    GrRectFill(&sDisplayContext, &sRect2);
    GrContextForegroundSet(&sDisplayContext, ClrWhite);
    sprintf(text,"%4d,%4d",buffer_increment,rem);
    GrContextFontSet(&sDisplayContext, g_pFontCm12/*g_pFontFixed6x8*/);
    GrStringDrawCentered(&sDisplayContext, text, -1,
                         GrContextDpyWidthGet(&sDisplayContext) / 2,
                         ((GrContextDpyHeightGet(&sDisplayContext) - 24) / 2) + 24,
                         0);
//    GrFlush(&sDisplayContext);
    max1=0;
    max2=0;
    res=0;
    res1=0;
    maxi1=0;
    maxi2=0;
    buffer_index=0;
    for(i=0;i<buffer_size;i++)
    {
    	buffer[0][i]=0;
    	buffer[1][i]=0;
    }
    i=0;
    j=0;
    ind2=buffer_index-buffer_increment+1;




}

//*****************************************************************************
//
// This is the main loop that runs the application.
//
//*****************************************************************************
void
HostMain(void)
{
    switch(iUSBState)
    {
        //
        // This state is entered when the mouse is first detected.
        //
        case eStateMouseInit:
        {
            //
            // Initialize the newly connected mouse.
            //
            USBHMouseInit(g_psMouseInstance);

            //
            // Proceed to the mouse connected state.
            //
            iUSBState = eStateMouseConnected;

            //
            // Update the status on the screen.
            //
            UpdateStatus(0, 0, true);

            //
            // Update the cursor on the screen.
            //
            UpdateCursor(GrContextDpyWidthGet(&g_sContext) / 2,
                         GrContextDpyHeightGet(&g_sContext)/ 2);

            break;
        }
        case eStateMouseConnected:
        {
            //
            // Nothing is currently done in the main loop when the mouse
            // is connected.
            //
            break;
        }
        case eStateNoDevice:
        {
            //
            // The mouse is not connected so nothing needs to be done here.
            //
            break;
        }
        default:
        {
            break;
        }
    }

    //
    // Periodically call the main loop for the Host controller driver.
    //
    USBHCDMain();
}

//*****************************************************************************
//
// Initialize the application interface.
//
//*****************************************************************************
void
UIInit(uint32_t ui32SysClock)
{
    //
    // Initialize the display driver.
    //
    Kentec320x240x16_SSD2119Init(ui32SysClock);

    //
    // Initialize the graphics context.
    //
    GrContextInit(&g_sContext, &g_sKentec320x240x16_SSD2119);

    //
    // Draw the application frame.
    //
    FrameDraw(&g_sContext, "usb-host-keyboard");

    //
    // Set the font for the application.
    //
    GrContextFontSet(&g_sContext, g_psFontFixed6x8);

    //
    // Calculate the number of characters that will fit on a line.
    // Make sure to leave a small border for the text box.
    //
    g_ui32CharsPerLine = (GrContextDpyWidthGet(&g_sContext) - 16) /
                         GrFontMaxWidthGet(g_psFontFixed6x8);

    //
    // Calculate the number of lines per usable text screen.  This requires
    // taking off space for the top and bottom banners and adding a small bit
    // for a border.
    //
    g_ui32LinesPerScreen = (GrContextDpyHeightGet(&g_sContext) -
                            (2*(DISPLAY_BANNER_HEIGHT + 1)) -
                            BUTTON_HEIGHT) / GrFontHeightGet(g_psFontFixed6x8);

    //
    // Set up the text scrolling variables.
    //
    g_ui32CurrentLine = 0;
    g_ui32EntryLine = 0;

    //
    // Draw the initial prompt on the screen.
    //
    DrawPrompt();

    //
    // Initial update of the screen.
    //
    UIUpdateStatus();
}

//*****************************************************************************
//
// This function will update the small mouse button indicators in the status
// bar area of the screen.  This can be called on its own or it will be called
// whenever UpdateStatus() is called as well.
//
//*****************************************************************************
void
UpdateButtons(void)
{
    tRectangle sRect, sRectInner;
    int iButton;

    //
    // Initialize the button indicator position.
    //
    sRect.i16XMin = GrContextDpyWidthGet(&g_sContext) - 36;
    sRect.i16YMin = GrContextDpyHeightGet(&g_sContext) - 18;
    sRect.i16XMax = sRect.i16XMin + 6;
    sRect.i16YMax = sRect.i16YMin + 8;
    sRectInner.i16XMin = sRect.i16XMin + 1;
    sRectInner.i16YMin = sRect.i16YMin + 1;
    sRectInner.i16XMax = sRect.i16XMax - 1;
    sRectInner.i16YMax = sRect.i16YMax - 1;

    //
    // Check all three buttons.
    //
    for(iButton = 0; iButton < 3; iButton++)
    {
        //
        // Draw the button indicator red if pressed and black if not pressed.
        //
        if(g_ui32Buttons & (1 << iButton))
        {
            GrContextForegroundSet(&g_sContext, ClrRed);
        }
        else
        {
            GrContextForegroundSet(&g_sContext, ClrBlack);
        }

        //
        // Draw the back of the  button indicator.
        //
        GrRectFill(&g_sContext, &sRectInner);

        //
        // Draw the border on the button indicator.
        //
        GrContextForegroundSet(&g_sContext, ClrWhite);
        GrRectDraw(&g_sContext, &sRect);

        //
        // Move to the next button indicator position.
        //
        sRect.i16XMin += 8;
        sRect.i16XMax += 8;
        sRectInner.i16XMin += 8;
        sRectInner.i16XMax += 8;
    }
}

//*****************************************************************************
//
// Print "Hello World!" to the display on the Intelligent Display Module.
//
//*****************************************************************************
int
main(void)
{
    tContext sContext;
    uint32_t ui32SysClock;

    //
    // Run from the PLL at 120 MHz.
    //
    ui32SysClock = MAP_SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |
                                           SYSCTL_OSC_MAIN | SYSCTL_USE_PLL |
                                           SYSCTL_CFG_VCO_480), 120000000);

    //
    // Configure the device pins.
    //
    PinoutSet();

    //
    // Initialize the display driver.
    //
    Kentec320x240x16_SSD2119Init(ui32SysClock);

    //
    // Initialize the graphics context.
    //
    GrContextInit(&sContext, &g_sKentec320x240x16_SSD2119);

    //
    // Draw the application frame.
    //
    FrameDraw(&sContext, "hello");

    //
    // Say hello using the Computer Modern 40 point font.
    //
    GrContextFontSet(&sContext, g_psFontCm40);
    GrStringDrawCentered(&sContext, "Hello World!", -1,
                         GrContextDpyWidthGet(&sContext) / 2,
                         ((GrContextDpyHeightGet(&sContext) - 32) / 2) + 24,
                         0);

    //
    // Flush any cached drawing operations.
    //
    GrFlush(&sContext);

    //
    // We are finished. Hang around doing nothing.
    //
    while(1)
    {
    }
}

//*****************************************************************************
//
// Shows the status string on the color STN display.
//
// \param psContext is a pointer to the graphics context representing the
// display.
// \param pcStatus is a pointer to the string to be shown.
//
//*****************************************************************************
void
DisplayStatus(tContext *psContext, char *pcStatus)
{
    tRectangle rectLine;
    int32_t i32Y;

    //
    // Calculate the Y coordinate of the top left of the character cell
    // for our line of text.
    //
    i32Y = (GrContextDpyHeightGet(psContext) / 4) -
           (GrFontHeightGet(TEXT_FONT) / 2);

    //
    // Determine the bounding rectangle for this line of text. We add 4 pixels
    // to the height just to ensure that we clear a couple of pixels above and
    // below the line of text.
    //
    rectLine.i16XMin = 0;
    rectLine.i16XMax = GrContextDpyWidthGet(psContext) - 1;
    rectLine.i16YMin = i32Y;
    rectLine.i16YMax = i32Y + GrFontHeightGet(TEXT_FONT) + 3;

    //
    // Clear the line with black.
    //
    GrContextForegroundSet(&g_sContext, ClrBlack);
    GrRectFill(psContext, &rectLine);

    //
    // Draw the new status string
    //
    GrContextForegroundSet(&g_sContext, ClrWhite);
    GrStringDrawCentered(psContext, pcStatus, -1,
                         GrContextDpyWidthGet(psContext) / 2,
                         GrContextDpyHeightGet(psContext) / 4 , false);
}

/**
 * Show the Text for the Bootscreen
 */
void vShowBootText(char* text)
{

	/* Header Rectangle */
	tRectangle sRect;

	if (g_sContext.pDisplay == 0)
	{
		GrContextInit(&g_sContext, DISPLAY_DRIVER);
	}

	//
	// Fill the top 24 rows of the screen with blue to create the banner.
	//
	sRect.sXMin = 0;
	sRect.sYMin = 0;
	sRect.sXMax = GrContextDpyWidthGet(&g_sContext);
	sRect.sYMax = GrContextDpyHeightGet(&g_sContext);

	GrContextForegroundSet(&g_sContext, DISPLAY_BOOT_SCREEN_BACKGROUND_COLOR);
	GrContextBackgroundSet(&g_sContext, DISPLAY_BOOT_SCREEN_BACKGROUND_COLOR);
	GrRectFill(&g_sContext, &sRect);

	//
	// Put a white box around the banner.
	//
	GrRectDraw(&g_sContext, &sRect);

	GrContextForegroundSet(&g_sContext, DISPLAY_BOOT_SCREEN_COLOR);
	//
	// Put the application name in the middle of the banner.
	//
	GrContextFontSet(&g_sContext, DISPLAY_BOOT_SCREEN_FONT);
	GrStringDrawCentered(&g_sContext, text, -1,
			GrContextDpyWidthGet(&g_sContext) / 2, GrContextDpyHeightGet(&g_sContext) / 2, 0);
}

//*****************************************************************************
//
// Shows the status string on the color STN display.
//
// \param psContext is a pointer to the graphics context representing the
// display.
// \param pcStatus is a pointer to the string to be shown.
//
//*****************************************************************************
void
DisplayStatus(tContext *psContext, char *pcStatus)
{
    tRectangle rectLine;
    long lY;

    //
    // Calculate the Y coordinate of the top left of the character cell
    // for our line of text.
    //
    lY = (GrContextDpyHeightGet(psContext) / 4) -
         (GrFontHeightGet(TEXT_FONT) / 2);

    //
    // Determine the bounding rectangle for this line of text.
    //
    rectLine.sXMin = 0;
    rectLine.sXMax = GrContextDpyWidthGet(psContext) - 1;
    rectLine.sYMin = lY;
    rectLine.sYMax = lY + GrFontHeightGet(TEXT_FONT) - 1;

    //
    // Clear the line with black.
    //
    GrContextForegroundSet(&g_sContext, ClrBlack);
    GrRectFill(psContext, &rectLine);

    //
    // Draw the new status string
    //
    DEBUG_PRINT("%s\n", pcStatus);
    GrContextForegroundSet(&g_sContext, ClrWhite);
    GrStringDrawCentered(psContext, pcStatus, -1,
                         GrContextDpyWidthGet(psContext) / 2,
                         GrContextDpyHeightGet(psContext) / 4 , false);
}

//*****************************************************************************
//
// This function updates the status area of the screen.  It uses the current
// state of the application to print the status bar.
//
//*****************************************************************************
void
UpdateStatus(char *pcString, tBoolean bClrBackground)
{
    tRectangle sRect;

    //
    // Fill the bottom rows of the screen with blue to create the status area.
    //
    sRect.sXMin = 0;
    sRect.sYMin = GrContextDpyHeightGet(&g_sContext) -
                  DISPLAY_BANNER_HEIGHT - 1;
    sRect.sXMax = GrContextDpyWidthGet(&g_sContext) - 1;
    sRect.sYMax = sRect.sYMin + DISPLAY_BANNER_HEIGHT;

    //
    //
    //
    GrContextBackgroundSet(&g_sContext, DISPLAY_BANNER_BG);

    if(bClrBackground)
    {
        //
        // Draw the background of the banner.
        //
        GrContextForegroundSet(&g_sContext, DISPLAY_BANNER_BG);
        GrRectFill(&g_sContext, &sRect);

        //
        // Put a white box around the banner.
        //
        GrContextForegroundSet(&g_sContext, DISPLAY_BANNER_FG);
        GrRectDraw(&g_sContext, &sRect);
    }

    //
    // Write the current state to the left of the status area.
    //
    GrContextFontSet(&g_sContext, g_pFontFixed6x8);

    //
    // Update the status on the screen.
    //
    if(pcString != 0)
    {
        GrStringDraw(&g_sContext, pcString, -1, 4, sRect.sYMin + 4, 1);
    }
}

//*****************************************************************************
//
// This function clears the main application screen area.
//
//*****************************************************************************
void
ClearMainWindow(void)
{
    tRectangle sRect;

    //
    // Initialize the button indicator.
    //
    sRect.i16XMin = 0;
    sRect.i16YMin = DISPLAY_BANNER_HEIGHT + 1;
    sRect.i16XMax = GrContextDpyWidthGet(&g_sContext) - 1;
    sRect.i16YMax = GrContextDpyHeightGet(&g_sContext) - DISPLAY_BANNER_HEIGHT;

    GrContextForegroundSet(&g_sContext, DISPLAY_MOUSE_BG);
    GrRectFill(&g_sContext, &sRect);
    GrContextForegroundSet(&g_sContext, DISPLAY_MOUSE_FG);
}

//*****************************************************************************
//
// Fill either the whole screen (psRect == NULL) or a subrectangle (psRect !=
// NULL) with the supplied color.
//
//*****************************************************************************
void
GraphicsDemoCls(tRectangle *psRect, unsigned long ulColor)
{
    tContext sContext;
    tRectangle sRect;

    //
    // Initialize a drawing context.
    //
    GrContextInit(&sContext, &g_sFormike240x320x16_ILI9320);

    //
    // Are we being asked to fill the whole screen or a subrectangle?
    //
    if(!psRect)
    {
        //
        // Get the full screen dimensions.
        //
        sRect.sXMin = 0;
        sRect.sYMin = 0;
        sRect.sXMax = GrContextDpyWidthGet(&sContext) - 1;
        sRect.sYMax = GrContextDpyHeightGet(&sContext) - 1;
    }
    else
    {
        //
        // Filling a subrectangle so just copy the rectangle passed.
        //
        sRect = *psRect;
    }

    //
    // Set the foreground color.
    //
    GrContextForegroundSet(&sContext, ulColor);

    //
    // Fill the screen with the required background color.
    //
    GrRectFill(&sContext, &sRect);

}

/**
 * Initialize the ParentWidget (=root for Drawing) with the Definitions of displayStyle.h
 */
void vInitializeParentWidget(void)
{
	xParentWidget.pFont = NULL;
	xParentWidget.pcText = NULL;
	xParentWidget.pucImage = NULL;
	xParentWidget.sBase.lSize = sizeof(tPushButtonWidget);
	xParentWidget.sBase.pChild = NULL;
	xParentWidget.sBase.pDisplay = DISPLAY_DRIVER;
	xParentWidget.sBase.pNext = NULL;
	xParentWidget.sBase.pParent = NULL;
	xParentWidget.sBase.pfnMsgProc = CanvasMsgProc;
	xParentWidget.sBase.sPosition.sXMax = GrContextDpyWidthGet(&g_sContext);
	xParentWidget.sBase.sPosition.sXMin = 0;
	xParentWidget.sBase.sPosition.sYMax = GrContextDpyHeightGet(&g_sContext);
	xParentWidget.sBase.sPosition.sYMin = 0;
	xParentWidget.ulFillColor = ClrBlack;
	xParentWidget.ulOutlineColor = ClrBlack;
	xParentWidget.ulStyle = CANVAS_STYLE_FILL;
	xParentWidget.ulTextColor = ClrBlack;
}

//.........这里部分代码省略.........

    //
    // Put the application name in the middle of the banner.
    //
    GrContextFontSet(&g_sContext, &g_sFontCm20);
    GrStringDrawCentered(&g_sContext, "usb host keyboard", -1,
                         GrContextDpyWidthGet(&g_sContext) / 2, 10, 0);

    //
    //Setup the interrupt controller
    //
#ifdef _TMS320C6X
    SetupDSPINTCInt();
    ConfigureDSPINTCIntUSB();
#else
    SetupAINTCInt(); 
    ConfigureAINTCIntUSB();
#endif
    
    DelayTimerSetup();
    
    //
    // Calculate the number of characters that will fit on a line.
    // Make sure to leave a small border for the text box.
    //
    g_ulCharsPerLine = (GrContextDpyWidthGet(&g_sContext) - 4) /
                        GrFontMaxWidthGet(&g_sFontCm20);

    //
    // Calculate the number of lines per usable text screen.  This requires
    // taking off space for the top and bottom banners and adding a small bit
    // for a border.
    //
    g_ulLinesPerScreen = (GrContextDpyHeightGet(&g_sContext) -
                          (2*(DISPLAY_BANNER_HEIGHT + 1)))/
                          GrFontHeightGet(&g_sFontCm20);


    //
    // Register the host class drivers.
    //
    USBHCDRegisterDrivers(0, g_ppHostClassDrivers, g_ulNumHostClassDrivers);

    // Open an instance of the keyboard driver.  The keyboard does not need
    // to be present at this time, this just save a place for it and allows
    // the applications to be notified when a keyboard is present.
    //
    g_ulKeyboardInstance = USBHKeyboardOpen(KeyboardCallback, g_pucBuffer,
                                            KEYBOARD_MEMORY_SIZE);

    //
    // Initialize the power configuration. This sets the power enable signal
    // to be active high and does not enable the power fault.
    //
    USBHCDPowerConfigInit(0, USBHCD_VBUS_AUTO_HIGH);

    //
    // Initialize the host controller stack.
    //
    USBHCDInit(0, g_pHCDPool, HCD_MEMORY_SIZE);

    //
    // Call the main loop for the Host controller driver.
    //
    USBHCDMain();

//.........这里部分代码省略.........
    sRect.sYMin = 0;
    sRect.sXMax = GrContextDpyWidthGet(&g_sContext) - 1;
    sRect.sYMax = (2 * DISPLAY_BANNER_HEIGHT) - 1;
    GrContextForegroundSet(&g_sContext, DISPLAY_BANNER_BG);
    GrRectFill(&g_sContext, &sRect);

    //
    // Change foreground for white text.
    //
    GrContextForegroundSet(&g_sContext, DISPLAY_TEXT_FG);

    //
    // Put the application name in the middle of the banner.
    //
    GrContextFontSet(&g_sContext, g_pFontFixed6x8);
    GrStringDrawCentered(&g_sContext, "usb-host-", -1,
                         GrContextDpyWidthGet(&g_sContext) / 2, 4, 0);
    GrStringDrawCentered(&g_sContext, "keyboard", -1,
                             GrContextDpyWidthGet(&g_sContext) / 2, 14, 0);


    //
    // Calculate the number of characters that will fit on a line.
    // Make sure to leave a small border for the text box.
    //
    g_ulCharsPerLine = (GrContextDpyWidthGet(&g_sContext) - 4) /
                        GrFontMaxWidthGet(g_pFontFixed6x8);

    //
    // Calculate the number of lines per usable text screen.  This requires
    // taking off space for the top and bottom banners and adding a small bit
    // for a border.
    //
    g_ulLinesPerScreen = (GrContextDpyHeightGet(&g_sContext) -
                          (3*(DISPLAY_BANNER_HEIGHT + 1)))/
                          GrFontHeightGet(g_pFontFixed6x8);

    //
    // Open and instance of the keyboard class driver.
    //
    UARTprintf("Host Keyboard Application\n");

    //
    // Initial update of the screen.
    //
    UpdateStatus();

    //
    // The main loop for the application.
    //
    while(1)
    {
        //
        // Tell the OTG library code how much time has passed in
        // milliseconds since the last call.
        //
        USBOTGMain(GetTickms());

        //
        // Has the USB mode changed since last time we checked?
        //
        if(g_eCurrentUSBMode != eLastMode)
        {
            //
            // Remember the new mode.
            //