lcd.c

mp3播放器软件

#define WriteData(data)			XBYTE[LCD_DATA] = data
#define WriteCmd(cmd)			XBYTE[LCD_CMDH] = CMD_MODLE;XBYTE[LCD_CMDL] = cmd
extern xdata unsigned char buffer[];


bit	LcdBusy()
{
	unsigned char	ucstatus;
	unsigned char   uccount;
	ucstatus = 0X80;             
	uccount = 10;
	while(ucstatus)    
	{
		XBYTE[LCD_CMDH] = 0x41;
		ucstatus = XBYTE[LCD_STATUS]&0x80;
		if(uccount--==0)return 0;
	}			
	return 0;
}		


bit		LcdInital(void)
{
	
	WriteCmd(0xe2);
	if(LcdBusy())return 1;
	WriteCmd(0xa1);
	if(LcdBusy())return 1;
	WriteCmd(0xc8);
	if(LcdBusy())return 1;
	WriteCmd(0xa9);
	if(LcdBusy())return 1;
//	WriteCmd(0xc0);
//	if(LcdBusy())return 1;
	WriteCmd(0xa3);
	if(LcdBusy())return 1;
	WriteCmd(0xa8);
	if(LcdBusy())return 1;
	WriteCmd(0x3f);
	if(LcdBusy())return 1;
	WriteCmd(0xad);
	if(LcdBusy())return 1;
	WriteCmd(0x01);
	if(LcdBusy())return 1;
	WriteCmd(0x2f);
	if(LcdBusy())return 1;
	WriteCmd(0x22);
	if(LcdBusy())return 1;
	//WriteCmd(0x74);
	//if(LcdBusy())return 1;
	if(LcdBusy())return 1;
	WriteCmd(0x40);
	if(LcdBusy())return 1;
	WriteCmd(0xaf);  
	if(LcdBusy())return 1;
	//jack 0827
	WriteCmd(0xa9);  
	if(LcdBusy())return 1;
//	WriteCmd(0xc1);  
//	if(LcdBusy())return 1;
	WriteCmd(0xa2);  
	if(LcdBusy())return 1;
	WriteCmd(0x81);  
	if(LcdBusy())return 1;
	WriteCmd(0x33);  
	if(LcdBusy())return 1;
	  
	return 0;
}

bit	ClearLcdRam(unsigned char Line)
{
	xdata unsigned char page;
	xdata unsigned char pageend;
	xdata unsigned char i;
	page = 0xb0 +(Line&0x0f);
	pageend = 0xb0+((Line>>4)&0x0f);
	do
	{
		WriteCmd(page);     
		if(LcdBusy())return 1;
		WriteCmd(0x10);
		if(LcdBusy())return 1;
		WriteCmd(0x00);
		if(LcdBusy())return 1;
		XBYTE[LCD_CMDH] = DATA_MODLE;
		for(i = 0;i < 112;i ++)
		{
			 WriteData(0x00);
		}
		page++;
	}while(page<=pageend);
	return 0;
}