mình cũng thấy rất thú vị với đồ án của bạn! mình sẽ thử code xem nhé! 
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/*****************************************************
This program was produced by the
CodeWizardAVR V1.25.9 Professional
Automatic Program Generator
© Copyright 1998-2008 Pavel Haiduc, HP InfoTech s.r.l.
http://www.hpinfotech.com
Project :
Version :
Date : 10/18/2009
Author : fiuzu
Company : psg
Comments:
Chip type : ATmega48
Clock frequency : 4.000000 MHz
Memory model : Small
External SRAM size : 0
Data Stack size : 128
*****************************************************/
#include <mega48.h>
#include <delay.h>
#define button PINC.0
// Declare your global variables here
unsigned int i,a,b,t,num,k;
unsigned int led[10]={0x3F,0x06,0x5B,0x4F,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
void hienthi(unsigned int num)
{
if(num<10)
{
PORTD=led[0];
PORTB=led[num];
}
else
{
b=num%10;
a=num/10;
PORTD=led[a];
PORTB=led[b];
}
}
void main(void)
{
// Declare your local variables here
// Crystal Oscillator division factor: 1
#pragma optsize-
CLKPR=0x80;
CLKPR=0x00;
#ifdef _OPTIMIZE_SIZE_
#pragma optsize+
#endif
// Input/Output Ports initialization
// Port B initialization
// Func7=Out Func6=Out Func5=Out Func4=Out Func3=Out Func2=Out Func1=Out Func0=Out
// State7=0 State6=0 State5=0 State4=0 State3=0 State2=0 State1=0 State0=0
PORTB=0x00;
DDRB=0xFF;
// Port C initialization
// Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTC=0x01;
DDRC=0x00;
// Port D initialization
// Func7=Out Func6=Out Func5=Out Func4=Out Func3=Out Func2=Out Func1=Out Func0=Out
// State7=0 State6=0 State5=0 State4=0 State3=0 State2=0 State1=0 State0=0
PORTD=0x00;
DDRD=0xFF;
ACSR=0x80;
ADCSRB=0x00;
i=0;
t=0;
num=0;
k=0;
hienthi(0);
while (1)
{
//start:
while(!button)
{
k=0;
i++;
t=1;
delay_ms(20);
if(i==5&&t==1);
{
num++;
hienthi(num);
t=0;
i=0;
}
while(!button)
{delay_ms(20);}
}
while(button)
{
k++;
delay_ms(20);
if(k==150)
{
k=0;
t=0;
i=0;
num=0;
hienthi(num);
}
}
}
}
chắc em mà bấm phím trong 8051 thì phải nối module ADC ngoài mất
dạ! em viết thêm đây ạ!
/*****************************************************
This program was produced by the
CodeWizardAVR V1.25.9 Professional
Automatic Program Generator
© Copyright 1998-2008 Pavel Haiduc, HP InfoTech s.r.l.
http://www.hpinfotech.com
Project :
Version :
Date : 10/18/2009
Author : fiuzu
Company : psg
Comments:
Chip type : ATmega48
Clock frequency : 4.000000 MHz
Memory model : Small
External SRAM size : 0
Data Stack size : 128
*****************************************************/
#include <mega48.h>
#include <delay.h>
#define button PINC.0
// Declare your global variables here
unsigned int i,a,b,t,num,k;
unsigned int led[10]={0x3F,0x06,0x5B,0x4F,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
void hienthi(unsigned int num)
{
if(num<10)
{
PORTD=led[0];
PORTB=led[num];
}
else
{
b=num%10;
a=num/10;
PORTD=led[a];
PORTB=led[b];
}
}
void main(void)
{
// Declare your local variables here
// Crystal Oscillator division factor: 1
#pragma optsize-
CLKPR=0x80;
CLKPR=0x00;
#ifdef _OPTIMIZE_SIZE_
#pragma optsize+
#endif
// Input/Output Ports initialization
// Port B initialization
// Func7=Out Func6=Out Func5=Out Func4=Out Func3=Out Func2=Out Func1=Out Func0=Out
// State7=0 State6=0 State5=0 State4=0 State3=0 State2=0 State1=0 State0=0
PORTB=0x00;
DDRB=0xFF;
// Port C initialization
// Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTC=0x01;
DDRC=0x00;
// Port D initialization
// Func7=Out Func6=Out Func5=Out Func4=Out Func3=Out Func2=Out Func1=Out Func0=Out
// State7=0 State6=0 State5=0 State4=0 State3=0 State2=0 State1=0 State0=0
PORTD=0x00;
DDRD=0xFF;
ACSR=0x80;
ADCSRB=0x00;
i=0;
t=0;
num=0;
k=0;
hienthi(0);
while (1)
{
//start:
while(!button)
{
k=0;
i++;
t=1;
delay_ms(20);
if(i==5&&t==1);
{
num++;
if(num==100){num=0;}
hienthi(num);
t=0;
i=0;
}
while(!button)
{delay_ms(20);}
}
while(button)
{
k++;
delay_ms(20);
if(k==150)
{
k=0;
t=0;
i=0;
num=0;
hienthi(num);
}
}
}
}
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