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#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit RS = P2^0;
sbit RW = P2^1;
sbit EN = P2^2;
sbit K0 = P3^0;
sbit K1 = P1^0;
sbit K2 = P1^1;
sbit K3 = P1^2;
sbit K4 = P1^3;
sbit K5 = P3^1;
sbit K6 = P2^3;
sbit K7 = P2^4;
sbit K8 = P3^4;
sbit Buzz = P3^7;
uint cnt = 0;//記錄中斷次數
uint cnt1= 0;
uint sec = 20;//記錄倒計時
uchar num = 0;//記錄搶答選手
uchar flag = 1;//搶答標志
uchar s_flag = 0;//開始標志
uchar e_flag = 0;//結束標志
uchar score[4]={0};
void init1602();
void Lcdshow(uchar x,uchar y,uchar *str);
void KeyScan();
void Keycontrol() ;
void Judge();
uchar IntToString(uchar *str, int dat);
void main()
{
uchar str1[12];
uchar str2[12];
uchar len,len1;
EA = 1;
ET0 = 1;
TMOD = 0x11;//打開定時器T0，T1
TR0 = 0;
TH0 = 0xFC;
TL0 = 0x67;
TR1 = 0;
TH1 = 0xFC;
TL1 = 0x67;
ET1 = 1;
init1602();
Lcdshow(0,0,str1);
while(1)
{
Keycontrol();
KeyScan();
len = IntToString(str1,sec);
len1= IntToString(str2,num);
if(e_flag==0)
{
Lcdshow(0,0,"Time:");
Lcdshow(6,0,str1);
}
if(num!=0&&e_flag==0&&flag==0)//沒有結束且有人按下按鍵
{
Lcdshow(0, 1, "answerer:");
Lcdshow(9, 1, str2);
}
if(e_flag==1)
{
Judge();
}
}
}
/*等待液晶準備*/
void Lcdready()
{
uchar sta;
P0 = 0xFF;
RS = 0;
RW = 1;
do
{
EN = 1;
sta = P0;//讀取狀態字
EN = 0;
}while(sta & 0x80);
}
/* 向 LCD1602 液晶寫入命令，cmd-待寫入命令值 */
void WriteCmd(uchar cmd)
{
Lcdready();
RS = 0;
RW = 0;
P0 = cmd;
EN = 1;
EN = 0;
}
/* 向 LCD1602 液晶寫入數據，dat-待寫入數據 */
void WriteData(uchar dat)
{
Lcdready();
RS = 1;
RW = 0;
P0 = dat;
EN = 1;
EN = 0;
}
/* 設置顯示 RAM 起始地址(x,y)-對應屏幕上的字符坐標 */
void Lcdaddr(uchar x,uchar y)
{
uchar m;
if(y==0)
m = 0x00+x; //第一行字符地址從 0x00 起始
else
m = 0x40+x; //第二行字符地址從 0x40 起始
WriteCmd(m | 0x80);//設置 RAM 地址
}
/* 在液晶上顯示字符串，(x,y)-對應屏幕上的起始坐標，str-字符串指針 */
void Lcdshow(uchar x,uchar y,uchar *str)
{
Lcdaddr(x,y);
while(*str != '\0')
{
WriteData(*str++);
}
}
/* 初始化 1602 液晶 */
void init1602()
{
WriteCmd(0x38);
WriteCmd(0x0C);
WriteCmd(0x06);
WriteCmd(0x01);
}
/* 整型數轉換為字符串，str-字符串指針，dat-待轉換數，返回值-字符串長度 */
unsigned char IntToString(unsigned char *str, int dat)
{
uchar i = 0;
unsigned char len = 0;
unsigned char buf[6];
if (dat < 0) //如果為負數，首先取絕對值，并在指針上添加負號
{
dat = -dat;
*str++ = '-';
len++;
}
do //先轉換為低位在前的十進制數組
{
buf[i++] = dat % 10;
dat /= 10;
} while (dat > 0);
len += i; //i最后的值就是有效字符的個數
while (i-- > 0) //將數組值轉換為ASCII碼反向拷貝到接收指針上
{
*str++ = buf[i] + '0';
}
*str = '\0'; //添加字符串結束符
return len; //返回字符串長度
}
/*簡易延時*/
void delay(uint x)
{
uchar i,j;
for(i=x;i>0;i--)
for(j=110;j>0;j--);
}
/*控制鍵掃描函數，開始結束*/
void Keycontrol()
{
if(K0==0) //開始鍵
{
delay(10);
if(K0==0)
{
while(!K0);
WriteCmd(0x01);
sec=20;
TR0=~TR0;
e_flag=0;
flag=1;
s_flag = 1;//表示已經開始
}
}
if(K5==0)
{
delay(10);
if(K5==0 && flag==0)
{
while(!K5);
e_flag =1;//表示結束
Buzz = 0;
Lcdshow(9,0,"Successed");
}
}
if(K8==0) //查分鍵
{
uchar ch;
delay(10);
if(K8==0 && e_flag==1) //按鍵按下且此時已結束
{
while(!K8);
WriteCmd(0x01);
Lcdshow(0,0,"P1:");
ch=(char) (score[1]+48);
WriteData(ch);
Lcdshow(10,0,"P2:");
ch=(char) (score[2]+48);
WriteData(ch);
Lcdshow(0,1,"P3:");
ch=(char) (score[3]+48);
WriteData(ch);
Lcdshow(10,1,"P4:");
ch=(char) (score[4]+48);
WriteData(ch);
}
}
}
/*四路熱鍵掃描(哪個鍵先按下,哪個優先級最高) */
void KeyScan()
{
if( K1==0 && flag != 0 && s_flag==1)
{
delay(10);
if(K1==0)
{
while(!K1);
num=1; //數碼管顯示1號"1"
TR0=0; //關閉定時器0,時間停止
TR1=1; //按下搶答器，蜂鳴器提醒
flag=0; //關閉開始鍵標志位,使再按其他三個鍵不會響應
}
}
if( K2==0 && flag != 0 && s_flag==1) //以下三個按鍵同一
{
delay(10);
if(K2==0)
{
while(!K1);
num=2;
TR0=0;
TR1=1;
flag=0;
}
}
if( K3==0 && flag != 0 && s_flag==1)
{
delay(10);
if(K3==0)
{
while(!K1);
num=3;
TR0=0;
TR1=1;
flag=0;
}
}
if( K4==0 && flag != 0 && s_flag==1)
{
delay(10);
if(K4==0)
{
while(!K1);
num=4;
TR0=0;
TR1=1;
flag=0;
}
}
}
void Judge()
{
if( K6==0 ) //Yes按鍵
{
delay(10);
if(K6==0)
{
while(!K6);
WriteCmd(0x01);
Lcdshow(0, 0, "Your answer is:");
Lcdshow(0, 1, "Right");
score[num]++;//為選手加分
}
}
if( K7==0 )
{
delay(10);
if(K7==0)
{
while(!K7);
WriteCmd(0x01);
Lcdshow(0, 0, "Your answer is:");
Lcdshow(0, 1, "Worry");
}
}
}
void Time0 () interrupt 1
{
TH0 = 0xFC;
TL0 = 0x67;//重賦值
cnt++;
if(cnt>=1000)
{
cnt = 0;
sec--;
if(sec==0)
TR0 = 0;
}
}
void Time1 () interrupt 3
{
TH1=(65536-2000)/256;
TL1=(65536-2000)%256;
Buzz = ~Buzz;
cnt1++;
if(cnt1==1000)
{
cnt1=0;
TR1=0;
}
}

復制代碼

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