#include <reg52.h>
#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int
uchar Song_Index = 0,Tone_Index = 0;
sbit SPK = P3^7;
sbit K10 = P1^0;
sbit K30 = P3^2;
unsigned char k, k1, k2;
unsigned int tab[] = {
64021,64103,64260,64400,64524,64580,64684,
64777,64820,64898,64968,65030,65058,65110};
void keyscan()
{
if(P0 != 0xff) {
k = 14;
if(K30==1){
if(P0 == 0xfe) k = 0;
if(P0 == 0xfd) k = 1;
if(P0 == 0xfb) k = 2;
if(P0 == 0xf7) k = 3;
if(P0 == 0xef) k = 4;
if(P0 == 0xdf) k = 5;
if(P0 == 0xbf) k = 6;}
if(K30==0){
if(P0 == 0xfe) k = 7;
if(P0 == 0xfd) k = 8;
if(P0 == 0xfb) k = 9;
if(P0 == 0xf7) k = 10;
if(P0 == 0xef) k = 11;
if(P0 == 0xdf) k = 12;
if(P0 == 0xbf) k = 13;}
if (k < 14) {
k1 = tab[k] / 256;
k2 = tab[k] % 256;
TR0 = 1;
}
else TR0 = 0;
}
else TR0 = 0;
}
uchar code DSY_CODE[]=
{
0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90
};
uchar code HI_LIST[]=
{
0,266,229,232,233,236,238,240,241,242,244,245,246,247,248
};
uchar code LO_LIST[]=
{
0,4,13,10,20,3,8,6,2,23,5,26,1,4,3
};
uchar code Song[][50]=
{
{1,2,3,1,1,2,3,1,3,4,5,3,4,5,3,4,5,5,6,1,2,3,6,2,6,6,2,3,4,5,2,5,2,3,-1},
{3,3,3,5,6,2,3,4,6,2,6,4,2,1,2,3,6,2,5,6,3,4,5,6,2,3,1,2,3,5,1,2,3,-1},
{3,2,1,3,2,1,1,2,3,1,3,5,1,5,4,6,2,6,3,4,2,3,6,2,3,4,2,1,1,1,2,2,2,3,3,2,6,3,5,3,5,1,2,6,4,5,-1}
};
uchar code Len[][50]=
{
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,2,2,2,2,2,2,2,2,2,2,2,1,1,-1},
{1,1,1,1,1,1,1,1,1,1,1,2,2,1,1,1,2,2,2,2,1,1,1,1,1,1,1,1,-1},
{1,1,2,1,1,2,1,1,1,1,1,1,1,1,2,1,1,1,2,1,1,1,1,1,1,1,2,1,2,1,2,1,2,1,1,1,1,1,2,2,-1}
};
void EX0_INT() interrupt 0
{
TR0 = 0;
Song_Index = (Song_Index+1)%3;
Tone_Index = 0;
P2 = DSY_CODE[Song_Index];
}
void T0_INT() interrupt 1
{
SPK = !SPK;
TH0 = HI_LIST[Song[Song_Index][Tone_Index]];
TL0 = LO_LIST[Song[Song_Index][Tone_Index]];
}
void delay(uint ms)
{
uchar i;
while(ms--)
{
for(i=0;i<120;i++);
}
}
void main()
{
ET0 = 1;
EA = 1;
while(1) keyscan();
P2 = 0xc0;
IE = 0x83;
TMOD = 0x00;
IT0 = 1;
IP = 0x02;
while(1)
{
while(K10==1);
while(K10==0);
TR0 = 1;
Tone_Index = 0;
while(Song[Song_Index][Tone_Index]!=-1&&K10==1&&TR0==1)
{
delay(300*Len[Song_Index][Tone_Index]);
Tone_Index++;
}
TR0 = 0;
while(K10==0);
}
}
void time() interrupt 1
{
TH0 = k1;
TL0 = k2;
SPK = ~SPK;
}
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