Phím bấm + led 7 segment

VIDEO DEMO

Chương trình viết bằng C

#include<REGX51.H>

/************khai bao bien*************/

sfr dataP = 0x90;//du lieu la P1

sbit contact = P3^4;

unsigned char dem = 0;

  //ma 7 thanh tu 0 den 9 la P1

 //0xc0h;0xf9h,0xa4h,0xb0h,0x99h,0x92h,0x82h;0xf8h;0x80h;0x90h.

void delay(long time)

{

while (time--);

}

/******************Chuong trinh con kiem tra phim nhan************/

void phim_an(void)

{

if(contact==0)

{

delay(500); //chong rung phim

while(contact==0);//cho nha phim

delay(500);//chong rung phim

dem++; //tang bien dem

if(dem==10)dem=0;

}

}

/***************hien thi so lan nhan phim********/

void solan_an(void)

{

switch(dem)

{

case 0:{dataP=0xc0;break;}

case 1:{dataP=0xf9;break;}

case 2:{dataP=0xa4;break;}

case 3:{dataP=0xb0;break;}

case 4:{dataP=0x99;break;}

case 5:{dataP=0x92;break;}

case 6:{dataP=0x82;break;}

case 7:{dataP=0xf8;break;}

case 8:{dataP=0x80;break;}

case 9:{dataP=0x90;break;}

};

}

 /***********chuong trinh chinh***********/

void main(void)

{

dataP=0xc0;

while(1)

{

phim_an();

solan_an();

}

}

Phạm Văn Ngọc Anh- 01644326695

Phạm Minh Nhật       - 01649679474