📄 2改rob.c
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///////////////////////12M
////////////////改为按一次键即可清除并启动
///////加一个开关作为两种抢答模式1不可连续抢答，2可连续抢答
#include<\atmel\AT89X51.h>
#include<intrins.h>
sbit robled1 = P3^1;
sbit robled2 = P3^3;
sbit robled3 = P3^5;
sbit robled4 = P1^7;
sbit startled = P2^0;
sbit speaker = P1^5;
sbit robkey1 = P1^0;
sbit robkey2 = P1^1;
sbit robkey3 = P1^2;
sbit robkey4 = P1^3;
sbit startkey = P1^4;
sbit statuskey = P0^1;
unsigned char th0_f; //在中断中装载的T0的值高8位
unsigned char tl0_f; //在中断中装载的T0的值低8位
void delay_10us(unsigned char delayvalue);
void delay_ms(unsigned int delayvalue);
unsigned char scankey(void);
void dispsub(void);
unsigned char scanrobkey(void);
void alarm(void);
void scankey1(void);
//T0的值,及输出频率对照表
unsigned char code freq[36*2]={
0xA9,0xEF,//00220HZ ,1 //0
0x93,0xF0,//00233HZ ,1#
0x73,0xF1,//00247HZ ,2
0x49,0xF2,//00262HZ ,2#
0x07,0xF3,//00277HZ ,3
0xC8,0xF3,//00294HZ ,4
0x73,0xF4,//00311HZ ,4#
0x1E,0xF5,//00330HZ ,5
0xB6,0xF5,//00349HZ ,5#
0x4C,0xF6,//00370HZ ,6
0xD7,0xF6,//00392HZ ,6#
0x5A,0xF7,//00415HZ ,7
0xD8,0xF7,//00440HZ 1 //12
0x4D,0xF8,//00466HZ 1# //13
0xBD,0xF8,//00494HZ 2 //14
0x24,0xF9,//00523HZ 2# //15
0x87,0xF9,//00554HZ 3 //16
0xE4,0xF9,//00587HZ 4 //17
0x3D,0xFA,//00622HZ 4# //18
0x90,0xFA,//00659HZ 5 //19
0xDE,0xFA,//00698HZ 5# //20
0x29,0xFB,//00740HZ 6 //21
0x6F,0xFB,//00784HZ 6# //22
0xB1,0xFB,//00831HZ 7 //23
0xEF,0xFB,//00880HZ `1
0x2A,0xFC,//00932HZ `1#
0x62,0xFC,//00988HZ `2
0x95,0xFC,//01046HZ `2#
0xC7,0xFC,//01109HZ `3
0xF6,0xFC,//01175HZ `4
0x22,0xFD,//01244HZ `4#
0x4B,0xFD,//01318HZ `5
0x73,0xFD,//01397HZ `5#
0x98,0xFD,//01480HZ `6
0xBB,0xFD,//01568HZ `6#
0xDC,0xFD,//01661HZ `7 //35
};
////////////////////////////////////////////
timer0() interrupt 1
{
TL0=tl0_f;TH0=th0_f; //调入预定时值
speaker=~speaker; //取反音乐输出IO
}
////////////////////
///////////////////////////////////////
void main(){
unsigned char i,j;
i=0;j=0;
speaker=0;
for(;;){
P3=0x0;
P1_5=0;
P1_7=0;
P2_0=1;
P2_2=0;
j=0;
for(;;){
j=scanrobkey();
if(j==0)break;
delay_ms(1);
}
if(statuskey==1){
if(startkey==0){
delay_ms(2);
if(startkey==0)i=scankey();
}
if(i!=0)dispsub();
i=0;
}
if(statuskey==0){
if(startkey==0){
delay_ms(2);
if(startkey==0)scankey1();
}
}
}
}
//////////////////12Mhz
unsigned char scanrobkey(void){
if(robkey1==0)return(1);
if(robkey2==0)return(1);
if(robkey3==0)return(1);
if(robkey4==0)return(1);
return(0);
}
///////////////////////////////////
void scankey1(void){
unsigned char temp;
unsigned char k1,k2,k3,k4;
k1=0;k2=0;k3=0;k4=0;
temp=0;
for(;;){ //testing startkey until startkey have been free
if(startkey==1){delay_ms(1);if(startkey==1)break;}
delay_ms(1);
}
P2_0=0;
P2_2=1;
for(;;){ //every key haved press will setup disabel
for(;;){
if((robkey1==0)&&(k1==0)){
k1=1;
robled1=1;
robled2=0;
robled3=0;
robled4=0;
break;
}
if((robkey2==0)&&(k2==0)){
k2=1;
robled1=0;
robled2=1;
robled3=0;
robled4=0;
break;
}
if((robkey3==0)&&(k3==0)){
k3=1;
robled1=0;
robled2=0;
robled3=1;
robled4=0;
break;
}
if((robkey4==0)&&(k4==0)){
k4=1;
robled1=0;
robled2=0;
robled3=0;
robled4=1;
break;
}
if(startkey==0){
delay_ms(2);
if(startkey==0){
P3=0x0;
P1_5=0;
P1_7=0;
return;
}
}
}
P2_0=1;
P2_2=1;
alarm();
for(temp=0;temp<100;temp++){ //delay 2second exact startkey active other key disabel
delay_ms(20);
if(startkey==0){
delay_ms(2);
if(startkey==0){
P3=0x0;
P1_5=0;
P1_7=0;
return;
}
}
}
}
return;
}
//////////////////////
unsigned char scankey(void){
unsigned char key;
key=0;
for(;;){
if(startkey==1){delay_ms(1);if(startkey==1)break;}
delay_ms(1);
}
P2_0=0;
P2_2=1;
for(;;){
if(robkey1==0){key=1;robled1=1;break;}
if(robkey2==0){key=2;robled2=1;break;}
if(robkey3==0){key=3;robled3=1;break;}
if(robkey4==0){key=4;robled4=1;break;}
if(startkey==0){
delay_ms(2);
if(startkey==0){key=0;break;}
}
}
//if(key==0){
// for(;;){
// if(startkey==1){delay_ms(1);if(startkey==1)break;}
// delay_ms(1);
// }
// }
//if(key!=0)speaker=1;
return(key);
}
///////////////////
void dispsub(void){
P2_0=1;
P2_2=1;
alarm();
delay_10us(10);
for(;;){
speaker=0;
//switch(k){
// case 1:robled1=1;break;
// case 2:robled2=1;break;
// case 3:robled3=1;break;
// case 4:robled4=1;break;
// default: break;
// }
if(startkey==0){
delay_ms(2);
if(startkey==0)break;
}
}
//for(;;){
// if(startkey==1){delay_ms(1);if(startkey==1)break;}
// delay_ms(1);
// }
P3=0x0;
P1_5=0;
P1_7=0;
}
///////////////////
void delay_10us(unsigned char delayvalue){
while(--delayvalue!=0){
_nop_();
_nop_();
_nop_();
_nop_();
continue;
}
}
//////////////////////////12Mhz
void delay_ms(unsigned int delayvalue){
unsigned int i,j;
for(i=0;i<delayvalue;i++)
for(j=0;j<123;j++);
}
////////////////////////////////
void alarm(void){
unsigned long n;
unsigned char i,j=0;
unsigned char code jie8[8]={12,14,16,17,19,21,23,24};//1234567`1八个音符在频率表中的位置
unsigned char code Led[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
TMOD = 0x01; //使用定时器0的16位工作模式
TR0 = 1;
ET0 = 1;
EA = 1;
for(i=7;i<8;i++) //循环播放8个音符
{
P0=Led[j];
j++;
if(j==8)
j=0;
tl0_f=freq[jie8[i]*2]; //置一个音符的值
th0_f=freq[jie8[i]*2+1];
for(n=0;n<15000;n++); //延时1秒左右
}
speaker=0;
EA = 0;
TR0 = 0;
ET0 = 0;
}
/*
void alarm(void){
signed char i,j;
signed stone;
//stone=
for(i=1;i<10;i++){
for(j=1;j<20;j++){
speaker=0;
delay_10us(i*30);
speaker=1;
delay_10us((50-i)*30);
}
delay_ms(j);
}
}
*/
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