avr325.i

avr325用codevisionAvr开发的lcd驱动程序

// CodeVisionAVR C Compiler
// (C) 1998-2005 Pavel Haiduc, HP InfoTech S.R.L.

// I/O registers definitions for the ATmega325


#pragma used+
sfrb PINA=0;
sfrb DDRA=1;
sfrb PORTA=2;
sfrb PINB=3;
sfrb DDRB=4;
sfrb PORTB=5;
sfrb PINC=6;
sfrb DDRC=7;
sfrb PORTC=8;
sfrb PIND=9;
sfrb DDRD=0xa;
sfrb PORTD=0xb;
sfrb PINE=0xc;
sfrb DDRE=0xd;
sfrb PORTE=0xe;
sfrb PINF=0xf;
sfrb DDRF=0x10;
sfrb PORTF=0x11;
sfrb PING=0x12;
sfrb DDRG=0x13;
sfrb PORTG=0x14;
sfrb TIFR0=0x15;
sfrb TIFR1=0x16;
sfrb TIFR2=0x17;
sfrb EIFR=0x1c;
sfrb EIMSK=0x1d;
sfrb GPIOR0=0x1e;
sfrb EECR=0x1f;
sfrb EEDR=0x20;
sfrb EEARL=0x21;
sfrb EEARH=0x22;
sfrw EEAR=0X21;   // 16 bit access
sfrb GTCCR=0x23;
sfrb TCCR0A=0x24;
sfrb TCNT0=0x26;
sfrb OCR0A=0x27;
sfrb GPIOR1=0x2a;
sfrb GPIOR2=0x2b;
sfrb SPCR=0x2c;
sfrb SPSR=0x2d;
sfrb SPDR=0x2e;
sfrb ACSR=0x30;
sfrb OCDR=0x31;
sfrb SMCR=0x33;
sfrb MCUSR=0x34;
sfrb MCUCR=0x35;
sfrb SPMCSR=0x37;
sfrb SPL=0x3d;
sfrb SPH=0x3e;
sfrb SREG=0x3f;
#pragma used-


// Interrupt vectors definitions



//#include <macros1.h>        
/****************************************************
定义管脚名称
*****************************************************/






unsigned char csd;

void delay_39us()    
{                           
   unsigned int i;
   for(i=0;i<300;i++)
   {
      #asm
      nop         
      nop 
      nop 
      nop 
      #endasm
   }
}


void PortIni(void)
{

     PORTB=0xff;
	 PORTD=0xff;
	 PORTC=0xff;
	 PORTG=0xff;
	 
     DDRB=0xff;
     DDRD=0xff;
     DDRC=0xff;
     DDRG=0xff;
}

unsigned char LCD_Busy ( void )
{

unsigned char temp;

PORTG&=~0x02;	   				

DDRC=0x00;			

PORTD&=~0x80;					
PORTG|= 0x01;					

PORTG|= 0x02;	   				 
#asm
nop
#endasm
temp = PINC;				

PORTG&=~0x02;	   				
DDRC=0xFF;
return temp;					
}




/*-----------------------------------------------  LCD  ------------------------------------------*/


void Lcd_start(void) 
{


  PORTD&=~0x80;
  PORTG&=~0x01;
  PORTG|= 0x02;
  PORTC=0x00;
  PORTC=0x30;
  for(csd=0;csd<10;csd++)
  {
      #asm
      nop         
      nop 
      nop 
      nop 
      #endasm
  }
  PORTG&=~0x02;

  
  delay_39us();
}


/*-------------------------------------------------------*/
/*  ???:       Lce_set                                */
/*  ??  :8?????,1???,5