main.c

单片机直接驱动TFT液晶显示320x240图像不需要lcd驱动IC

//*************************************************************************
//                 Camera Module Controler 
//   Writed By Holmestang
//   编译环境 : ICCAVR    支持器件 : ATMEGA8515
//   Use extern CRYSTAL 11.0592MHz fusebit 0xD9DE, lockbit 0x00FF
// 	 COPYRIGHT (C) 2007
//   EXTRAM: 32K (Max Address 0x260~0xFFFF)                       
//   Crystal: 16.000Mhz
//
//*************************************************************************

#include "Main.h"
#include "TFTdriver.h"
#include "Serinit.h"
#include "Delay.h"

unsigned char *Bmp_Buffer=(unsigned char *)0x0260;

///////////////////////////////////////////////////////////
void main(void)
{
	CLI(); 			              //Disable all interrupts

    PORTA = 0x00;
    DDRA  = 0x00;
    PORTB = 0x00;
    DDRB  = 0x00;
    PORTC = 0x00;
    DDRC  = 0x00;
    PORTD = 0x00;
    DDRD  = 0x00; 
    PORTE = 0x00;
    DDRE  = 0x00; 

	MCUCR = 0x80; 	  		  	  //Enable ExtRam
    EMCUCR = 0x00;				  //Ext Ram 0x0260~0xFFFF,Low 0 wait,High 0 wait
    GICR = 0x00;  				  //No interrupt		   
	TIMSK = 0x00;		          //Disable T/C1,T/C0
	SFIOR = BIT(XMBK)|BIT(PUD);	  //XM break keeper, Pull up disable

    delayms(100);
 	serinit(); 
	SEI(); 	  		              //Enable all interrupts
    send_string("Test TFT V02\x0D\x0A\x00");

    if ( !check_extram() )
		send_string("Ram fail!\x0D\x0A\x00");
	else
	{
		send_string("Ram pass!\x0D\x0A\x00");
		load_bmp_to_ram();
    	Test_TFT_Lcd();
	}
	while(1);
}

void load_bmp_to_ram(void)
{
    unsigned char value;
    unsigned int i,length,chksum=0;
	
	send_string("Please load bmp data to ram!\x0D\x0A\x00");
	length=get_data();
	length=length*0x100+get_data();
	send_num( MSB(length) );
	send_num( LSB(length) );
	send_data(0x0D);
	send_data(0x0A);

	for (i=0;i<length;i++)
	{
		value=get_data();
		*(Bmp_Buffer+i)=value;
		chksum+=value;
	}
 	send_num( MSB(chksum) );
	send_num( LSB(chksum) );
	send_data(0x0D);
	send_data(0x0A);
	send_string("Receive bmp data finish!\x0D\x0A\x00");
}

/////////////////////////////////////////////////////////////////////
BOOL check_extram(void)
{
 	unsigned int i,j;
	unsigned char value;

	send_string("Write extram ...\x0D\x0A\x00");
	for( i=0; i<0x8000; i++)
	    *(Bmp_Buffer+i)=i&0xFF;
	send_string("finish!\x0D\x0AVerify extram ...\x0D\x0A\x00");
	for( i=0; i<0x8000; i++)
	{
	    value = *(Bmp_Buffer+i); 
		if(  value != (i&0xFF) )
		{
		    send_data('@');
		    send_num(MSB(i));
		    send_num(LSB(i));
			send_data('=');
		    send_num(value);
			send_data(0x0D);
			send_data(0x0A);
			return FALSE;
		}
		if ((i%1024)==0)
		{
			j=BinBcd(MSB(i));
			send_num(MSB(j));
			send_num(LSB(j));
			send_data(0x0D);
			send_data(0x0A);
		}
	}
	return TRUE;
}

//; ---------------------------------------------------------------------------
//; Convert a byte Bin to Bcd code 
//; ---------------------------------------------------------------------------
unsigned int BinBcd(unsigned char a)
{
	unsigned int i;
	unsigned char b1,b2,b3;

	b1=a/100;
	b2=(a-b1*100)/10;
	b3=a-b1*100-b2*10;
	i=b1*0x100+b2*0x10+b3;
	return i;
}