/*****************************************************
	深圳市普泰科技公司 	http://www.pt-star.com
	深圳職業技術學院	http://www.szpt.edu.cn

功能目的:   8段數碼管示例程序

目標系統:   基于ATmega16L單片機

時鐘頻率：  1.000000 MHz

內存模式：  Small

外部存儲器容量：0

數據堆棧容量：256

應用軟件:   CodeWizardAVR V1.24.7e Standard                                               

版    本:   Version 1.0

時    間：  2006-08-01

作者:       LEE

說    明:   若用于商業用途，請保留此段文字或注明代碼來源 

	深 圳 市 普 科 技 公 司 保 留 所 有 的 版 權
*********************************************************************/

#include <mega16.h>
#include <delay.h>    

#define bit3() 	PORTA&=0xef		//PA4
#define bit2() 	PORTA&=0xdf		//PA5
#define bit1() 	PORTA&=0xbf		//PA6
#define bit0() 	PORTA&=0x7f		//PA7

unsigned char num[10]={0xc0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x98};//共陽數碼管譯碼值



void display(unsigned char data[4])
{
      PORTA|=0xf0; 
      bit0() ; 
      PORTB=num[ data[0]];
      delay_ms(2);
      PORTA|=0xf0;   
      bit1() ; 
      PORTB=num[ data[1]];
      delay_ms(2);
      PORTA|=0xf0;
      bit2() ; 
      PORTB=num[data[2]];
      delay_ms(2);
      PORTA|=0xf0;
      bit3() ; 
      PORTB=num[data[3]];
      delay_ms(2);
  }
  
  
void main(void)
{
unsigned char j,buffer[4];    
unsigned int i;

// Input/Output Ports initialization
// Port A initialization
// Func7=Out Func6=Out Func5=Out Func4=Out Func3=In Func2=In Func1=In Func0=In 
// State7=1 State6=1 State5=1 State4=1 State3=T State2=T State1=T State0=T 
PORTA=0xF0;
DDRA=0xF0;

// Port B initialization
// Func7=Out Func6=Out Func5=Out Func4=Out Func3=Out Func2=Out Func1=Out Func0=Out 
// State7=1 State6=1 State5=1 State4=1 State3=1 State2=1 State1=1 State0=1 
PORTB=0xFF;
DDRB=0xFF;

// Port C 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 
PORTC=0x00;
DDRC=0x00;

// Port D 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 
PORTD=0x00;
DDRD=0x00;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=FFh
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer 1 Stopped
// Mode: Normal top=FFFFh
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer 1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
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: Timer 2 Stopped
// 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=0x00;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;
i=0;
while (1)
{
    if (++j==25)
    {
    i++;
    j=0;
    }
    buffer[0]=i%10;
    buffer[1]=(i%100)/10;
    buffer[2]=(i%1000)/100;
    buffer[3]=i/1000;
   display(buffer);
   
  };
}