基于单片机的八路抢答器 21
3.2 程序代码
3.2.1 主程序 void main() {
init();
if(k==0) //主持人按下开始键 {
Timer(); delay(10); while(!k); while(1) {
dis(); m=0; n=0;
if(second==10){beep=1;delay(500);beep=0;} if(second==0) {
TR0=0;n=1; if(k==0)
{beep=1;delay(500);beep=0;second=29;TR0=1;m=1;} } if(n==0) {
if(k1==0) {delay(5);if(k1==0);while(!k1);t=1;} else if(k2==0) {delay(5);if(k2==0);while(!k2);t=2;} else if(k3==0) {delay(5);if(k3==0);while(!k2);t=3;} else if(k4==0) {delay(5);if(k4==0);while(!k2);t=4;} else if(k5==0) {delay(5);if(k5==0);while(!k2);t=5;} else if(k6==0) {delay(5);if(k6==0);while(!k2);t=6;} else if(k7==0) {delay(5);if(k7==0);while(!k2);t=7;} else if(k8==0) {delay(5);if(k8==0);while(!k2);t=8;} else if(k==0) {delay(5);if(k==0);while(!k);t=0;i=0;second=29;beep=1;delay(500);beep=0;TR0=1;}
} while(t) {
if(m==0) //开关，保证程序只执行一次 {
switch(t) {
case 1: {
基于单片机的八路抢答器 22
TR0=0;i=1;second=0;beep=1;delay(500);beep=0;
a1=0;a2=1;a3=1;a4=1;a5=1;a6=1;a7=1;a8=1;m=1;break; } case 2: {
TR0=0;i=2;second=0;beep=1;delay(500);beep=0;
a2=0;a1=1;a3=1;a4=1;a5=1;a6=1;a7=1;a8=1;m=1;break; } case 3: {
TR0=0;i=3;second=0;beep=1;delay(500);beep=0;
a3=0;a1=1;a2=1;a4=1;a5=1;a6=1;a7=1;a8=1;m=1;break; } case 4: {
TR0=0;i=4;second=0;beep=1;delay(500);beep=0;
a4=0;a1=1;a2=1;a3=1;a5=1;a6=1;a7=1;a8=1;m=1;break; } case 5: {
TR0=0;i=5;second=0;beep=1;delay(500);beep=0;
a5=0;a1=1;a2=1;a3=1;a4=1;a6=1;a7=1;a8=1;m=1;break; } case 6: {
TR0=0;i=6;second=0;beep=1;delay(500);beep=0;
a6=0;a1=1;a2=1;a3=1;a4=1;a5=1;a7=1;a8=1;m=1;break; } case 7: {
TR0=0;i=7;second=0;beep=1;delay(500);beep=0;
a7=0;a1=1;a2=1;a3=1;a4=1;a5=1;a6=1;a8=1;m=1;break; } case 8: {
TR0=0;i=8;second=0;beep=1;delay(500);beep=0;
基于单片机的八路抢答器 23
a8=0;a1=1;a2=1;a3=1;a4=1;a5=1;a6=1;a7=1;m=1;break; } } }
if(a1==0) //选手1的分数 { second=score1; dis();
if(m1==0)
{delay(5);if(m1==0);while(!m1);beep=1;delay(100);beep=0;score1+=1;if(score1==99)score1=60;} else if(m2==0) {delay(5);if(m2==0);while(!m2);beep=1;delay(100);beep=0;score1-=1;if(score1==0)score1=60;} dis(); }
else if(a2==0)
{ second=score2; dis();
if(m1==0)
{delay(5);if(m1==0);while(!m1);beep=1;delay(100);beep=0;score2+=1;if(score2==99)score2=60;} else if(m2==0) {delay(5);if(m2==0);while(!m2);beep=1;delay(100);beep=0;score2-=1;if(score2==0)score2=60;}
dis(); }
else if(a3==0)
{ second=score3; dis();
if(m1==0)
{delay(5);if(m1==0);while(!m1);beep=1;delay(100);beep=0;score3+=1;if(score3==99)score3=60;} else if(m2==0) {delay(5);if(m2==0);while(!m2);beep=1;delay(100);beep=0;score3-=1;if(score3==0)score3=60;}
second=score3; dis(); }
else if(a4==0)
基于单片机的八路抢答器 24
{
second=score4; dis();
if(m1==0)
{delay(5);if(m1==0);while(!m1);beep=1;delay(100);beep=0;score4+=1;if(score4==99)score4=60;} else if(m2==0) {delay(5);if(m2==0);while(!m2);beep=1;delay(100);beep=0;score4-=1;if(score4==0)score4=60;}
second=score4; dis(); }
else if(a5==0) {
second=score5; dis();
if(m1==0)
{delay(5);if(m1==0);while(!m1);beep=1;delay(100);beep=0;score5+=1;if(score5==99)score5=60;} else if(m2==0) {delay(5);if(m2==0);while(!m2);beep=1;delay(100);beep=0;score5-=1;if(score5==0)score5=60;}
second=score5; dis(); }
else if(a6==0) {
second=score6; dis();
if(m1==0)
{delay(5);if(m1==0);while(!m1);beep=1;delay(100);beep=0;score6+=1;if(score6==99)score6=60;} else if(m2==0) {delay(5);if(m2==0);while(!m2);beep=1;delay(100);beep=0;score6-=1;if(score6==0)score6=60;}
second=score6; dis(); }
else if(a7==0) {
second=score7;
基于单片机的八路抢答器 25
dis();
if(m1==0)
{delay(5);if(m1==0);while(!m1);beep=1;delay(100);beep=0;score7+=1;if(score7==99)score7=60;} else if(m2==0) {delay(5);if(m2==0);while(!m2);beep=1;delay(100);beep=0;score7-=1;if(score7==0)score7=60;}
second=score7; dis(); }
else if(a8==0) {
second=score8; dis();
if(m1==0)
{delay(5);if(m1==0);while(!m1);beep=1;delay(100);beep=0;score8+=1;if(score8==99)score8=60;} else if(m2==0) {delay(5);if(m2==0);while(!m2);beep=1;delay(100);beep=0;score8-=1;if(score8==0)score8=60;}
second=score8; dis(); }
if(k==0){i=0;t=0;second=29;beep=1;delay(500);beep=0;TR0=1;} while(!k);
} } } }
3.2.2 定时器子程序 void Timer() {
TMOD|=0x01;
TH0=0xd8; //初值55536，计数10000次，每次1US，总计10ms TL0=0xf0;
IE=0x82; //这里是中断优先级控制EA=1（开总中断）,ET0=1（定时器0允许中断)，这里用定时器0来定时 TR0=1; }