lcd_v16c6448ac.c

2440 开发板的测试程序。包括uart,iic,lcd

/**************************************************************
The initial and control for 640×480 16Bpp TFT LCD----V16C6448AC
**************************************************************/

#include "def.h"
#include "option.h"
#include "2440addr.h"
#include "2440lib.h"
#include "2440slib.h" 

#define CLKVAL_TFT_640480	(1)		
//元太6.4寸TFT液晶屏V16C6448AC时钟频率典型值为25.175MHz
//FCLK = 180MHz, HCLK = PCLK = 90MHz
//VCLK = HCLK / [(CLKVAL+1) * 2]	 ( CLKVAL >= 0 )
//VCLK = 45MHz		//  34MHz < VCLK < 40MHz

#define MVAL		(13)
#define MVAL_USED 	(0)		//0=each frame   1=rate by MVAL
#define BSWP		(0)		//Byte swap control
#define HWSWP		(1)		//Half word swap control

#define M5D(n) ((n) & 0x1fffff)	// To get lower 21bits

//TFT 640480
#define LCD_XSIZE_TFT_640480 	(640)	
#define LCD_YSIZE_TFT_640480 	(480)

//TFT 640480
//#define SCR_XSIZE_TFT_640480 	(640)
//#define SCR_YSIZE_TFT_640480 	(480)
#define SCR_XSIZE_TFT_640480 	(640)
#define SCR_YSIZE_TFT_640480 	(480)

//TFT640480
#define HOZVAL_TFT_640480	(LCD_XSIZE_TFT_640480-1)
#define LINEVAL_TFT_640480	(LCD_YSIZE_TFT_640480-1)

//以下参数只针对元太6.4寸TFT液晶屏V16C6448AC
#define VGA350_MODE		0
#define FREEDOM_MODE		1

#if VGA350_MODE
#define VBPD_640480		(33)	//垂直同步信号的后肩		VGA350模式，都是负极性
#define VFPD_640480		(10)		//垂直同步信号的前肩
#define VSPW_640480		(2)		//垂直同步信号的脉宽

#define HBPD_640480		(48)		//水平同步信号的后肩
#define HFPD_640480		(16)		//水平同步信号的前肩
#define HSPW_640480		(96)		//水平同步信号的脉宽
#elif   FREEDOM_MODE
#define VBPD_640480		(20)	//垂直同步信号的后肩		FREEDOM模式，都是正极性
#define VFPD_640480		(16)		//垂直同步信号的前肩
#define VSPW_640480		(2)		//垂直同步信号的脉宽

#define HBPD_640480		(48)		//水平同步信号的后肩
#define HFPD_640480		(16)		//水平同步信号的前肩
#define HSPW_640480		(96)		//水平同步信号的脉宽
#endif

extern void Uart_Printf( char* f , ... ) ;

//extern unsigned char girl3_640_480[] ;		//宽640，高480

volatile static unsigned short LCD_BUFER[SCR_YSIZE_TFT_640480][SCR_XSIZE_TFT_640480];

/**************************************************************
640×480 16Bpp TFT LCD功能模块初始化
**************************************************************/
static void Lcd_Init( void )
{
	rGPCUP = 0xffffffff; // Disable Pull-up register
	rGPCCON = 0xaaaa56a9; //Initialize VD[7:0],LCDVF[2:0],VM,VFRAME,VLINE,VCLK,LEND 

	rGPDUP = 0xffffffff; // Disable Pull-up register
	rGPDCON = 0xaaaaaaaa; //Initialize VD[15:8]

	rLCDCON1 = ( CLKVAL_TFT_640480 << 8 ) | ( MVAL_USED << 7 ) | ( 3 << 5 ) | ( 12 << 1 ) | 0;
	// TFT LCD panel,12bpp TFT,ENVID=off
	rLCDCON2 = ( VBPD_640480 << 24 ) | ( LINEVAL_TFT_640480 << 14 ) | ( VFPD_640480 << 6 ) | ( VSPW_640480 );
	rLCDCON3 = ( HBPD_640480 << 19 ) | ( HOZVAL_TFT_640480 << 8 ) | ( HFPD_640480 );
	rLCDCON4 = ( MVAL << 8 ) | ( HSPW_640480 );
	rLCDCON5 = ( 1 << 11 ) | ( 0 << 9 ) | ( 0 << 8 ) | ( 0 << 6 ) | ( BSWP << 1 ) | ( HWSWP );	//FRM5:6:5,HSYNC and VSYNC are inverted

	rLCDSADDR1 = ( ( ( U32 ) LCD_BUFER >> 22 ) << 21 ) | M5D( ( U32 ) LCD_BUFER >> 1 );
	rLCDSADDR2 = M5D( ( ( U32 ) LCD_BUFER + ( SCR_XSIZE_TFT_640480 * LCD_YSIZE_TFT_640480 * 2 ) ) >> 1 );
	rLCDSADDR3 = ( ( ( SCR_XSIZE_TFT_640480 - LCD_XSIZE_TFT_640480 ) / 1 ) << 11 ) | ( LCD_XSIZE_TFT_640480 / 1 );
	rLCDINTMSK |= ( 3 ); // MASK LCD Sub Interrupt
	rTCONSEL &= ~( ( 1 << 4 ) | 1 ); // Disable LCC3600, LPC3600
	rTPAL = 0; // Disable Temp Palette
}

/**************************************************************
LCD视频和控制信号输出或者停止，1开启视频输出
**************************************************************/
static void Lcd_EnvidOnOff( int onoff )
{
	if ( onoff == 1 )
		rLCDCON1 |= 1; // ENVID=ON
	else
		rLCDCON1 = rLCDCON1 & 0x3fffe; // ENVID Off
}

/**************************************************************
640×480 8Bpp TFT LCD 电源控制引脚使能
**************************************************************/
static void Lcd_PowerEnable( int invpwren , int pwren )
{
	//GPG4 is setted as LCD_PWREN
	rGPGUP = rGPGUP & ( ~( 1 << 4 ) ) | ( 1 << 4 ); // Pull-up disable
	rGPGCON = rGPGCON & ( ~( 3 << 8 ) ) | ( 3 << 8 ); //GPG4=LCD_PWREN
	//Enable LCD POWER ENABLE Function
	rLCDCON5 = rLCDCON5 & ( ~( 1 << 3 ) ) | ( pwren << 3 );   // PWREN
	rLCDCON5 = rLCDCON5 & ( ~( 1 << 5 ) ) | ( invpwren << 5 );   // INVPWREN
}

/**************************************************************
640×480 16Bpp TFT LCD移动观察窗口
**************************************************************/
static void Lcd_MoveViewPort( int vx , int vy )
{
	U32 addr;

	SET_IF(); 
#if (LCD_XSIZE_TFT_640480<32)
	while ( ( rLCDCON1 >> 18 ) <= 1 ); // if x<32
#else	
	while ( ( rLCDCON1 >> 18 ) == 0 ); // if x>32
#endif

	addr = ( U32 ) LCD_BUFER + ( vx * 2 ) + vy * ( SCR_XSIZE_TFT_640480 * 2 );
	rLCDSADDR1 = ( ( addr >> 22 ) << 21 ) | M5D( addr >> 1 );
	rLCDSADDR2 = M5D( ( ( addr + ( SCR_XSIZE_TFT_640480 * LCD_YSIZE_TFT_640480 * 2 ) ) >> 1 ) );
	CLR_IF();
}    

/**************************************************************
640×480 16Bpp TFT LCD移动观察窗口
**************************************************************/
static void MoveViewPort( void )
{
	int vx = 0, vy = 0, vd = 1;

	Uart_Printf( "\n*Move the LCD view windos:\n" );
	Uart_Printf( " press 8 is up\n" );
	Uart_Printf( " press 2 is down\n" );
	Uart_Printf( " press 4 is left\n" );
	Uart_Printf( " press 6 is right\n" );
	Uart_Printf( " press Enter to exit!\n" );

	while ( 1 )
	{
		switch ( Uart_GetKey() )
		{
			case '8':
				if ( vy >= vd )
					vy -= vd;    	   	
				break;

			case '4':
				if ( vx >= vd )
					vx -= vd;
				break;

			case '6':
				if ( vx <= ( SCR_XSIZE_TFT_640480 - LCD_XSIZE_TFT_640480 - vd ) )
					vx += vd;   		
				break;

			case '2':
				if ( vy <= ( SCR_YSIZE_TFT_640480 - LCD_YSIZE_TFT_640480 - vd ) )
					vy += vd;   		
				break;

			case '\r':
				return;

			default:
				break;
		}
		Uart_Printf( "vx=%3d,vy=%3d\n" , vx , vy );
		Lcd_MoveViewPort( vx , vy );
	}
}

/**************************************************************
640×480 16Bpp TFT LCD单个象素的显示数据输出
**************************************************************/
static void PutPixel( U32 x , U32 y , U32 c )
{
	if ( ( x < SCR_XSIZE_TFT_640480 ) && ( y < SCR_YSIZE_TFT_640480 ) )
		LCD_BUFER[( y )][( x )] = c;
}

/**************************************************************
640×480 16Bpp TFT LCD全屏填充特定颜色单元或清屏
**************************************************************/
static void Lcd_ClearScr( U32 c )
{
	unsigned int x,y ;

	for ( y = 0 ; y < SCR_YSIZE_TFT_640480 ; y++ )
	{
		for ( x = 0 ; x < SCR_XSIZE_TFT_640480 ; x++ )
		{
			LCD_BUFER[y][x] = c ;
		}
	}
}

/**************************************************************
LCD屏幕显示垂直翻转
// LCD display is flipped vertically
// But, think the algorithm by mathematics point.
//   3I2
//   4 I 1
//  --+--   <-8 octants  mathematical cordinate
//   5 I 8
//   6I7
**************************************************************/
static void Glib_Line( int x1 , int y1 , int x2 , int y2 , int color )
{
	int dx, dy, e;
	dx = x2 - x1; 
	dy = y2 - y1;

	if ( dx >= 0 )
	{
		if ( dy >= 0 ) // dy>=0
		{
			if ( dx >= dy ) // 1/8 octant
			{
				e = dy - dx / 2;
				while ( x1 <= x2 )
				{
					PutPixel( x1 , y1 , color );
					if ( e > 0 )
					{
						y1 += 1;e -= dx;
					}	
					x1 += 1;
					e += dy;
				}
			}
			else		// 2/8 octant
			{
				e = dx - dy / 2;
				while ( y1 <= y2 )
				{
					PutPixel( x1 , y1 , color );
					if ( e > 0 )
					{
						x1 += 1;e -= dy;
					}	
					y1 += 1;
					e += dx;
				}
			}
		}
		else		   // dy<0
		{
			dy = -dy;   // dy=abs(dy)

			if ( dx >= dy ) // 8/8 octant
			{
				e = dy - dx / 2;