//chuong trinh dem len 00-99 hien thi tren led 7 doan

//portB noi voi cac doan a,b,c..h

//RC0,RC1 lam nhiem vu quet led

#include"16f877a.h"

#include"def_877a.h"

#use delay(clock=4000000)

//dinh nghia ma 7 doan

const char bangma[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};//tich cuc mucthap

//chuong trinh con hien thi

void hienthi(chuc7d,dv7d)

{

PORTB=chuc7d;  

rC1=0;       

delay_ms(50); 

rC1=1;     

PORTB=dv7d;  

rC0=0;     

delay_ms(50);

rC0=1;    

}

//chuong trinh chinh

void main()

{

char j=0;   //khai bao bien tinh

char chuc=0,dv=0;

char chuc7d,dv7d;

int i=0;   // i la bien dem tu 0-99

// xac lap dau ra

trisb=0;

trisc0=0;

trisc1=0;

while (true)

{

while (i<=99)

{

chuc=i/10; 

dv=i%10;      

chuc7d=bangma[chuc];

dv7d=bangma[dv];

/* dung FOR tao mot vong lap de thuc hien chuong trinh hien thi

chuong trinh hien thi duoc thuc hien 20 lan*/

for(j=0;j<=20;j++) hienthi(chuc7d,dv7d);

i=i+1;  //tang bien dem len 1

}

}

}