单片机六路抢答器C语言程序

1、精选优质文档-倾情为你奉上单片机六路数显计时抢答器c语言程序 #include <reg52.h>#define uint unsigned int#define uchar unsigned charunsigned char code table=0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xc0;sbit start=P36;sbit reset=P37;sbit key1=P10;sbit key2=P11;sbit key3=P12;sbit key4=P13;sbit key5=P14;sbit key6=P15

2、;sbit key7=P16;sbit key8=P17;sbit jia=P34;sbit jian=P35;bit action = 0;uchar second=10,a7=0;uchar timer0_count = 0;uchar number=0;uchar number_display = 0;uchar k;void delay(uint z)uint x,y;for(x=z;x>0;x-)for(y=120;y>0;y-);void display(uchar number,uchar second)P2 = 0x01;P0 = tablesecond;delay

3、(1);P2 = 0x02;P0 = tablenumber;delay(1);P2 = 0x04;P0 = tablea0;delay(1);P2 = 0x08;P0 = tablea1;delay(1);P2 = 0x10; P0 = tablea2;delay(1);P2 = 0x20;P0 = tablea3;delay(1);P2 = 0x40;P0 = tablea4;delay(1);P2 = 0x80;P0 = tablea5;delay(1);void start_keyscan() void fengling();while(start = 0) key7=0;displa

4、y(number_display,second);if(start = 1) key7=1;action = 1;TR0 = 1;uchar key_scan8()if(key1 = 0)delay(8);if(key1 = 0)number = 1;number_display = number;if(key2 = 0)delay(8);if(key2 = 0)number = 2;number_display = number;if(key3 = 0)delay(8);if(key3 = 0)number = 3;number_display = number;if(key4 = 0)de

5、lay(8);if(key4 = 0)number = 4;number_display = number;if(key5 = 0)delay(8);if(key5 = 0)number = 5;number_display = number;if(key6 = 0)delay(8);if(key6 = 0)number = 6;number_display = number;if(number_display != 0)return number_display;elsereturn 0;void reset_keyscan()if(reset = 0)delay(8);if(reset =

6、 0)number_display = 0; second=10; void main()TMOD=0x01;TH0=(65536-50000)/256;TL0=(65536-50000)%256;EA=1;ET0=1;TR0=0;P2=0x00;while(1) reset_keyscan();start_keyscan(); if(jia=0&&anumber-1<9) delay(10); while(jia=0) display(number_display,second); anumber-1=anumber-1+1; if(jian=0&&an

7、umber-1>0) delay(10); while (jian=0) display(number_display,second); anumber-1=anumber-1-1; while(action) while(!key_scan8() display(number_display,second);if(second = 0)second = 10;break;TR0 = 0;key7=0;delay(80); display(number_display,second); key7=1;action = 0;break;display(number_display,second); void timer0() interrupt 1TH0=(65536-50000)/256;TL0=(65536-50000)%2