tft_driver.c

凌阳SPCE3200多媒体开发板自带源程序。共安排了32个子目录

//====================================================================================
//文 件 名：TFT_Driver.c
//功能描述: TFT驱动程序(底层驱动)
//维护记录: 2007年1月17日
//====================================================================================
#include "TFT_Driver.h"

STR_TFT TFT_Settings;
STR_TFT *pTFT_Settings = &TFT_Settings;	
unsigned short *pTFT_WorkBuf;
unsigned short *pTFT_DispBuf;

//=============================================================
//语法格式：	void TFT_SetSettings(void);
//实现功能：	更新TFT缓冲格式和缓冲地址设定
//参数：		无
//返回值：		无
//=============================================================
void TFT_SetSettings(void)
{
	*P_TFT_FRAME_FMT1 = pTFT_Settings->Buf_Format1;
	*P_TFT_FRAME_FMT2 = pTFT_Settings->Buf_Format2;
	*P_LCD_BUFFER_SA1 = (unsigned int)pTFT_Settings->Buf0;
	*P_LCD_BUFFER_SA2 = (unsigned int)pTFT_Settings->Buf1;
	*P_LCD_BUFFER_SA3 = (unsigned int)pTFT_Settings->Buf2;
}

//=============================================================
//语法格式：	unsigned short *TFT_SelDispBuf(unsigned char Buf_Cursor);
//实现功能：	选择一个缓冲区作为显示缓冲区
//参数：		Buf_Cursor - 作为显示输出的缓冲区序号(0~2)
//返回值：		作为显示输出的缓冲区起始地址
//=============================================================
unsigned short *TFT_SelDispBuf(unsigned char Buf_Cursor)
{
	*P_LCD_BUFFER_SEL = Buf_Cursor;
	switch(Buf_Cursor)
	{
		case 0:
			pTFT_DispBuf = pTFT_Settings->Buf0;
			break;
		case 1:
			pTFT_DispBuf = pTFT_Settings->Buf1;
			break;
		case 2:
			pTFT_DispBuf = pTFT_Settings->Buf2;
			break;
		default:
			break;		
	}
	return pTFT_DispBuf;
}

//=============================================================
//语法格式：	unsigned short *TFT_SelWorkBuf(unsigned char Buf_Cursor);
//实现功能：	选择一个缓冲区作为工作缓冲区(TFT_API中的函数都是对工作缓冲区操作的)
//参数：		Buf_Cursor - 作为工作缓冲区的序号(0~2)
//返回值：		作为工作缓冲区的起始地址
//=============================================================
unsigned short *TFT_SelWorkBuf(unsigned char Buf_Cursor)
{
	switch(Buf_Cursor)
	{
		case 0:
			pTFT_WorkBuf = pTFT_Settings->Buf0;
			break;
		case 1:
			pTFT_WorkBuf = pTFT_Settings->Buf1;
			break;
		case 2:
			pTFT_WorkBuf = pTFT_Settings->Buf2;
			break;
		default:
			break;		
	}
	return pTFT_WorkBuf;
}

//=============================================================
//语法格式：	void TFT_InitHardware(void);
//实现功能：	初始化TFT相关硬件寄存器
//参数：		无
//返回值：		无
//=============================================================
void TFT_InitHardware(void)
{
	int i;

 	*P_LCD_INTERFACE_SEL |= TFT_INTERFACE;					// 管脚复用，选择TFT_AUO模式
	*P_LCD_CLK_CONF = C_LCD_RST_DIS | C_LCD_CLK_EN;			// LCD模式时钟使能
	if(clksel==24)
		*P_LCD_CLK_SEL|=0x08;
	// 设置TFT-LCD数据模式
	*P_TFT_DATA_SEQ = TFT_DATA_SEQ;							// TFT-LCD输出数据顺序
	*P_TFT_DATA_FMT = TFT_DATA_FMT;							// TFT-LCD管脚输出数据格式

	// 设置TFT-LCD的行信号
	*P_TFT_HOR_ACT = TFT_HOR_ACT;
	*P_TFT_HOR_FRONT = TFT_HOR_FRONT;
	*P_TFT_HOR_BACK = TFT_HOR_BACK;
	*P_TFT_HOR_SYNC = TFT_HOR_SYNC;
	
	// 设置TFT-LCD的场信号
	*P_TFT_VER_ACT = TFT_VER_ACT;
	*P_TFT_VER_FRONT = TFT_VER_FRONT;
	*P_TFT_VER_BACK = TFT_VER_BACK;
	*P_TFT_VER_SYNC = TFT_VER_SYNC;

	// 设置TFT-LCD显示的起始位置
	*P_TFT_ROW_START = TFT_ROW_START;
	*P_TFT_COL_START = TFT_COL_START;
	*P_TFT_COL_WIDTH = TFT_COL_WIDTH;
	*P_TFT_DUMMY_WIDTH = TFT_DUMMY_WIDTH;
	
	pTFT_Settings->Buf_Format1 = C_TFT_BUF_RGB565 ;//C_TFT_BUF_4Y4U4Y4V;
	pTFT_Settings->Buf_Format2 = C_TFT_BUF_YUV;// signC_TFT_BUF_YCBCR
	pTFT_Settings->Buf0 = (unsigned short*)TFT_BUFFER0_SA;
	pTFT_Settings->Buf1 = (unsigned short*)TFT_BUFFER1_SA;
	pTFT_Settings->Buf2 = (unsigned short*)TFT_BUFFER2_SA;
	
	TFT_SetSettings();

	for(i=0; i<TFT_WIDTH*TFT_HEIGHT; i++)
	{
		pTFT_Settings->Buf0[i] = 0x0000;
		pTFT_Settings->Buf1[i] = 0x0000;
		pTFT_Settings->Buf2[i] = 0x0000;
	}
	TFT_SelWorkBuf(0);
	TFT_SelDispBuf(0);
	
	// 设置TFT-LCD的控制寄存器
	*P_TFT_INT_STATUS = ~C_TFT_INT_EN;			// 中断不使能
	// 使能TFT模块，图像不放大，选择6.75MHz时钟
	*P_TFT_MODE_CTRL = C_TFT_CTRL_EN | TFT_CLK_SET;
}