/*****************************************************
This program was produced by the
CodeWizardAVR V2.04.3a Evaluation
Automatic Program Generator
© Copyright 1998-2009 Pavel Haiduc, HP InfoTech s.r.l.
http://www.hpinfotech.com

Project :
Version :
Date : 26/09/2009
Author : Freeware, for evaluation and non-commercial use only
Company :
Comments:


Chip type : ATmega8
Program type : Application
AVR Core Clock frequency: 10.240000 MHz
Memory model : Small
External RAM size : 0
Data Stack size : 256
*****************************************************/

#include <mega8.h>

// Alphanumeric LCD Module functions
#asm
.equ __lcd_port=0x12 ;PORTD
#endasm
#include <lcd.h>

typedef unsigned char byte;

// table for the user defined character
// arrow that points to the top right corner
flash byte char0[8]={
0b10000000,
0b10001111,
0b10000011,
0b10000101,
0b10001001,
0b10010000,
0b10100000,
0b11000000};

// function used to define user characters
void define_char(byte flash *pc,byte char_code)
{
byte i,a;
a=(char_code<<3)|0x40;
for (i=0; i<8; i++) lcd_write_byte(a++,*pc++);
}

void main(void)
{
// initialize the LCD for
// 2 lines & 16 columns
lcd_init(16);

// define user character 0
define_char(char0,0);

// switch to writing in Display RAM
lcd_gotoxy(0,0);
// display the user defined characters
lcd_putsf("User defined\nchar 0:");
// display the user defined char 0
lcd_putchar(0);

// stop here
while (1);

ldi temp1,0b11010011; регистр, bits0..3 которого должны отправиться в D0-D3

in temp0,PIND
andi temp0,0b11110000 ;mask bits3..0
andi temp1,0b00001111
or temp0,temp1
out PORTD,temp0