基于单片机8位竞赛抢答器仿真设计-全套资料

Posted 2021-05-15 Mr song song

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#include<reg51.h>

sbit DIN=P3^0;//与max7219接口定义
sbit LOAD=P3^1;
sbit CLK=P3^2;

sbit key0=P1^0;//8路抢答器按键
sbit key1=P1^1;
sbit key2=P1^2;
sbit key3=P1^3;
sbit key4=P1^4;
sbit key5=P1^5;
sbit key6=P1^6;
sbit key7=P1^7;

sbit key_clear=P2^0;//主持人时间设置、清除
sbit begin=P2^1;//主持人开始按键

sbit sounder=P3^7;//蜂鸣器

unsigned char second=30;//秒表计数值
unsigned char counter=0;//counter每100，minite加1
unsigned char people=0;//抢答结果

unsigned char num_add[]={0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08};//max7219读写地址、内容
unsigned char num_dat[]={0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89};

unsigned char keyscan()//键盘扫描函数
{
  unsigned char keyvalue,temp;