c code
 
 
 
/*****************************************************
This program was produced by the
CodeWizardAVR V1.24.8d Professional
Automatic Program Generator
© Copyright 1998-2006 Pavel Haiduc, HP InfoTech s.r.l.
http://www.hpinfotech.com
 
Project : 
Version : 
Date    : 1/10/2008
Author  :Tuan Le ngoc                           
Company : BIA++                          
Comments: 
 
 
Chip type           : ATmega16L
Program type        : Application
Clock frequency     : 4.000000 MHz
Memory model        : Small
External SRAM size  : 0
Data Stack size     : 256
*****************************************************/
 
#include <mega16.h>    
#include <delay.h>
#include<stdio.h>  
 
// Alphanumeric LCD Module functions
#asm
   .equ __lcd_port=0x15 ;PORTC
#endasm
#include <lcd.h>
 
 
#define RXB8 1
#define TXB8 0
#define UPE 2
#define OVR 3
#define FE 4
#define UDRE 5
#define RXC 7
 
#define FRAMING_ERROR (1<<FE)
#define PARITY_ERROR (1<<UPE)
#define DATA_OVERRUN (1<<OVR)
#define DATA_REGISTER_EMPTY (1<<UDRE)
#define RX_COMPLETE (1<<RXC)
 
 
 
 
unsigned char test; 
 
 
 
 
 
 
 
 void init_comm(void )
 {  
 // init che do cong I/O
 DDRD.0=0;PORTD.0=1;
 DDRD.1=1;   
 
 // CHE DO KO DONG BO ,8 BIT , 1 BIT STOP ,U2X=0,ko dung parity  
 
UCSRA=0x00;
UCSRB=0x90;     //E ngat nhan va E cho nhan
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x33;    //  baud =9600     of 8Mhz
 
 } 
////////////   
 
 
 
void main(void)
{
s1=1;s2=s3=s4=0;
// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
 
PORTA=0x00;
DDRA=0x01;
 
// Port B initialization
// Func7=Out Func6=Out Func5=Out Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=1 State6=1 State5=1 State4=P State3=P State2=P State1=P State0=P 
PORTB=0x00;
DDRB=0xFF;
 
// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=Out Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=1 State2=T State1=T State0=T 
PORTC=0xFF;
DDRC=0xFF;
 
// Port D initialization
// Func7=Out Func6=Out Func5=Out Func4=Out Func3=In Func2=In Func1=Out Func0=Out 
// State7=1 State6=1 State5=1 State4=1 State3=P State2=P State1=1 State0=1 
PORTD=0xF3;
DDRD=0xF3;
 
 
// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: 3.906 kHz
// Mode: Normal top=FFh
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;
 
// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: 3.906 kHz
// Mode: Ph. correct PWM top=00FFh
// OC1A output: Inverted
// OC1B output: Inverted
// Noise Canceler: Off
// Input Capture on Falling Edge
//TCCR1A=0xF1;
//TCCR1B=0x05;
TCCR1A=0x00;
TCCR1B=0x04;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;     
 
 // Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: 15.625 kHz
// Mode: Normal top=FFh
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;
 
 
 
// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;
 
// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x04;
 
// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;
 
 
 
//SFIOR&=0x1F;
 
// LCD module initialization
 
// Global enable interrupts
//#asm("sei") 
// LCD module initialization
lcd_init(16); 
  init_comm();
while (1)
      {
      // Place your code here   
    lcd_gotoxy(0,0);
lcd_putsf("Giao tiep :"); 
//test=getchar();
//putchar(test);   
 
 
 lcd_gotoxy(12,1);   
 
test=getchar();  
lcd_putchar(test);
 
 
 
  }      
 
}