lcd.c

此例程是基于ARMS3C44B0的经典例程 对于嵌入式开发而言很有用 需要硬件平台

    }
    else
    {
        for( wCurx = usX0, wCury = usY0, wNextx = usX1,
             wNexty = usY1, decision = (usDy >> 1);
             wCury <= wNexty; wCury++, wNexty--, decision += usDx )
        {
            if( decision >= usDy )
            {
                decision -= usDy;
                wCurx += x_sign;
                wNextx -= x_sign;
            }
            for( wpx = wCurx - usWidth / 2;
                 wpx <= wCurx + usWidth / 2; wpx++ )
            {
                LCD_PutPixel(wpx, wCury, ucColor);
            }

            for( wpx = wNextx - usWidth / 2;
                 wpx <= wNextx + usWidth / 2; wpx++ )
            {
                LCD_PutPixel(wpx, wNexty, ucColor);
            }
        }
    }
}

/*********************************************************************************************
* name:		Lcd_Draw_HLine()
* func:		Draw horizontal line with appointed color
* para:		usX0,usY0 -- line's start point coordinate
*			usX1 -- line's end point X-coordinate
*			ucColor -- appointed color value
*			usWidth -- line's width
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void Lcd_Draw_HLine(INT16 usX0, INT16 usX1, INT16 usY0, INT8U ucColor, INT16U usWidth)
{
	INT16 usLen;

    if( usX1 < usX0 )
    {
        GUISWAP (usX1, usX0);
    }

    while( (usWidth--) > 0 )
    {
        usLen = usX1 - usX0 + 1;
        while( (usLen--) > 0 )
        {
        	LCD_PutPixel(usX0 + usLen, usY0, ucColor);
        }
        usY0++;
    }
}

/*********************************************************************************************
* name:		Lcd_Draw_VLine()
* func:		Draw vertical line with appointed color
* para:		usX0,usY0 -- line's start point coordinate
*			usY1 -- line's end point Y-coordinate
*			ucColor -- appointed color value
*			usWidth -- line's width
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void Lcd_Draw_VLine (INT16 usY0, INT16 usY1, INT16 usX0, INT8U ucColor, INT16U usWidth)
{
	INT16 usLen;

    if( usY1 < usY0 )
    {
        GUISWAP (usY1, usY0);
    }

    while( (usWidth--) > 0 )
    {
        usLen = usY1 - usY0 + 1;
        while( (usLen--) > 0 )
        {
        	LCD_PutPixel(usX0, usY0 + usLen, ucColor);
        }
        usX0++;
    }
}

/*********************************************************************************************
* name:		Lcd_DspAscII6x8()
* func:		display 6x8 ASCII character string 
* para:		usX0,usY0 -- ASCII character string's start point coordinate
*			ForeColor -- appointed color value
*			pucChar   -- ASCII character string
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void Lcd_DspAscII6x8(INT16U usX0, INT16U usY0,INT8U ForeColor, INT8U* pucChar)
{
	INT32U i,j;
	INT8U  ucTemp;

	while( *pucChar != 0 )
	{
		for( i=0; i < 8; i++ )
		{
  			ucTemp = g_auc_Ascii6x8[(*pucChar) * 8 + i];
  			for( j = 0; j < 8; j++ )
  			{
  				if( (ucTemp & (0x80 >> j)) != 0 )
  				{
  					LCD_PutPixel(usX0 + i, usY0 + 8 - j, (INT8U)ForeColor);
  				}  				
  			}
		}
		usX0 += XWIDTH;
		pucChar++;
	}
}

/*********************************************************************************************
* name:		ReverseLine()
* func:		Reverse display some lines 
* para:		ulHeight -- line's height
*			ulY -- line's Y-coordinate
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void ReverseLine(INT32U ulHeight, INT32U ulY)
{
	INT32U i, j, temp;
	
	for( i = 0; i < ulHeight; i++ )
	{
		for( j = 0; j < (SCR_XSIZE/4/2) ; j++ )
		{
			temp = *(INT32U*)(LCD_VIRTUAL_BUFFER + (ulY+i)*SCR_XSIZE/2 + j*4);
			temp ^= 0xFFFFFFFF;
			*(INT32U*)(LCD_VIRTUAL_BUFFER + (ulY+i)*SCR_XSIZE/2 + j*4) = temp;
		}
	}
}

/*********************************************************************************************
* name:		Zdma0Done()
* func:		LCD dma interrupt handle function
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
 INT8U ucZdma0Done=1;	//When DMA is finish,ucZdma0Done is cleared to Zero
void __irq Zdma0Done(void)
{
	rI_ISPC|=BIT_ZDMA0;	    //clear pending
	ucZdma0Done=0;
}

/*********************************************************************************************
* name:		Lcd_Dma_Trans()
* func:		dma transport virtual LCD screen to LCD actual screen
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void Lcd_Dma_Trans(void)
{
//	INT8U err;
	
	ucZdma0Done=1;
	//#define LCD_VIRTUAL_BUFFER	(0xc400000)
	//#define LCD_ACTIVE_BUFFER	(LCD_VIRTUAL_BUFFER+(SCR_XSIZE*SCR_YSIZE/2))	//DMA ON
	//#define LCD_ACTIVE_BUFFER	LCD_VIRTUAL_BUFFER								//DMA OFF
	//#define LCD_BUF_SIZE		(SCR_XSIZE*SCR_YSIZE/2)
	//So the Lcd Buffer Low area is from LCD_VIRTUAL_BUFFER to (LCD_ACTIVE_BUFFER+(SCR_XSIZE*SCR_YSIZE/2))
	rNCACHBE1=(((unsigned)(LCD_ACTIVE_BUFFER)>>12) <<16 )|((unsigned)(LCD_VIRTUAL_BUFFER)>>12);
  	rZDISRC0=((unsigned)DW<<30)|(1<<28)|LCD_VIRTUAL_BUFFER; // inc
  	rZDIDES0=((unsigned)2<<30)|(1<<28)|LCD_ACTIVE_BUFFER; // inc
        
        rZDICNT0=          ( 2<<28)  |   (1<<26)  | (LCD_BUF_SIZE) | (3<<22)  |  (0<<20);
        
        //                      |            |            |             |            |---->0 = Disable DMA
        //                      |            |            |             |------------>Int. whenever transferred
        //                      |            |            |-------------------->Write time on the fly
        //                      |            |---------------------------->Block(4-word) transfer mode
        //                      |------------------------------------>whole service
	//reEnable ZDMA transfer
  	rZDICNT0 |= (1<<20);		//after ES3
    rZDCON0=0x1; // start!!!  

	delay(500);
	//while(ucZdma0Done);		//wait for DMA finish
}

/*********************************************************************************************
* name:		Lcd_Test()
* func:		LCD test function
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void Lcd_Test(void)
{
	/* initial LCD controller */
	Lcd_Init();
	/* clear screen */
	Lcd_Clr();
	Lcd_Active_Clr();
	/* draw rectangle pattern */ 
	Lcd_Draw_Box(0,0,80,60,15);
	Lcd_Draw_Box(80,0,160,60,15);
	Lcd_Draw_Box(160,0,240,60,15);
	Lcd_Draw_Box(240,0,320,60,15);
	Lcd_Draw_Box(0,60,80,120,15);
	Lcd_Draw_Box(80,60,160,120,15);
	Lcd_Draw_Box(160,60,240,120,15);
	Lcd_Draw_Box(240,60,320,120,15);
	Lcd_Draw_Box(0,120,80,180,15);
	Lcd_Draw_Box(80,120,160,180,15);
	Lcd_Draw_Box(160,120,240,180,15);
	Lcd_Draw_Box(240,120,320,180,15);
	Lcd_Draw_Box(0,180,80,240,15);
	Lcd_Draw_Box(80,180,160,240,15);
	Lcd_Draw_Box(160,180,240,240,15);
	Lcd_Draw_Box(240,180,320,240,15);
	/* output ASCII symbol */
	Lcd_DspAscII6x8(37,26,BLACK,"0");
	Lcd_DspAscII6x8(117,26,BLACK,"1");
	Lcd_DspAscII6x8(197,26,BLACK,"2");
	Lcd_DspAscII6x8(277,26,BLACK,"3");
	Lcd_DspAscII6x8(37,86,BLACK,"4");
	Lcd_DspAscII6x8(117,86,BLACK,"5");
	Lcd_DspAscII6x8(197,86,BLACK,"6");
	Lcd_DspAscII6x8(277,86,BLACK,"7");
	Lcd_DspAscII6x8(37,146,BLACK,"8");
	Lcd_DspAscII6x8(117,146,BLACK,"9");
	Lcd_DspAscII6x8(197,146,BLACK,"A");
	Lcd_DspAscII6x8(277,146,BLACK,"B");
	Lcd_DspAscII6x8(37,206,BLACK,"C");
	Lcd_DspAscII6x8(117,206,BLACK,"D");
	Lcd_DspAscII6x8(197,206,BLACK,"E");
	Lcd_DspAscII6x8(277,206,BLACK,"F");
	Lcd_Dma_Trans();
	delay(100);
}