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#include<AT892051.h>
sbit R4 = 0x90;
sbit R3 = 0x91;
sbit R2 = 0x92;
sbit R1 = 0x93;
sbit L1 = 0x94;
sbit L2 = 0x95;
sbit L3 = 0x96;
sbit L4 = 0x97;
sbit L5 = 0xB0;
sbit L6 = 0xB1;
sbit cente = 0xB2;
sbit R6 = 0xB3;
sbit R5 = 0xB5;
unsigned char preloadTH=0xFF,preloadTL=0xFF,mode=0;
unsigned int pointer=0,i=0,j;
//octa: 0
//key : C C# D D# E F F# G G# A A# B
const float key_octa0[]={16.35,17.32,18.35,19.45,20.6,21.83,23.12,24.5,25.96,27.5,29.14,30.87};
const unsigned int chuan=200;
const float crystal=11.0592;
code unsigned char array[]=
{"5a#,5a#,5b$,5a$,6d$,6C% \
5a#,5a#,5b$,5a$,6e$,6d% \
5a#,5a#,6a$,6F$,6d#,6d#,6C$,5b$ \
6g#,6g#,6F$,6d$,6e$,6d% \
6F#,6g#,6d#,6e#,6d#,5b#,5a$,6F$,6e#,6f#,6g$,6g#,6F=,6e#,6d#,6C%,s"
};
void delay_ms( unsigned int ms )
{ unsigned int i,j;
for (i=0;i<ms;i++)
for (j=0;j<120;j++){};
}
void doitanso(float tanso)
{
unsigned int giatrinap;
giatrinap=65536-(unsigned int)((1000000*crystal)/(24*tanso));
preloadTL=(unsigned char)giatrinap;
preloadTH=(unsigned char)(giatrinap>>8);
}
void key(unsigned char octa,unsigned char k)
{
float tanso;
switch (k)
{
case 'c' : tanso=key_octa0[0]; break;
case 'C' : tanso=key_octa0[1]; break;
case 'd' : tanso=key_octa0[2]; break;
case 'D' : tanso=key_octa0[3]; break;
case 'e' : tanso=key_octa0[4]; break;
case 'f' : tanso=key_octa0[5]; break;
case 'F' : tanso=key_octa0[6]; break;
case 'g' : tanso=key_octa0[7]; break;
case 'G' : tanso=key_octa0[8]; break;
case 'a' : tanso=key_octa0[9]; break;
case 'A' : tanso=key_octa0[10]; break;
case 'b' : tanso=key_octa0[11]; break;
}
switch (octa)
{
case '5' : tanso*=32; break;
case '6' : tanso*=64; break;
}
doitanso(tanso);
}
unsigned int trave(unsigned int ms)
{
unsigned int a;
a=preloadTH;
a=a<<8|preloadTL;
return (ms*crystal*1000)/12/(65536-a);
}
unsigned int tempo(unsigned char tem)
{
switch (tem)
{
case '=' : return trave(chuan*3/4); break;
case '#' : return trave(chuan*3/2); break;
case '$' : return trave(chuan*3); break;
case '%' : return trave(chuan*6); break;
}
}
void timer0_ISR() interrupt 1
{
P3_7=!P3_7;
TL0=preloadTL;
TH0=preloadTH;
if(i==0)
{
if(array[pointer]=='s')
{ TR0 = 0;
pointer = 0; // comeback
TR0 = 1;
};
key(array[pointer],array[pointer+1]);
j=tempo(array[pointer+2]);
}
i++;
if(i==j)
{
i=0;
pointer+=4;
}
}
void program1()
{ L1 = R1 = 0 ; delay_ms(500);
L2 = R2 = 0 ; delay_ms(500);
L3 = R3 = 0 ; delay_ms(500);
L4 = R4 = 0 ; delay_ms(500);
L5 = R5 = 0 ; delay_ms(500);
L6 = R6 = 0 ; delay_ms(500);
cente = 0 ; delay_ms(500);
L1 = R1 = 1 ; delay_ms(300);
L2 = R2 = 1 ; delay_ms(300);
L3 = R3 = 1 ; delay_ms(300);
L4 = R4 = 1 ; delay_ms(300);
L5 = R5 = 1 ; delay_ms(300);
L6 = R6 = 1 ; delay_ms(300);
cente = 1 ; delay_ms(300);
}
void program2()
{ L1 = 0 ; delay_ms(100);
L2 = 0 ; delay_ms(100);
L3 = 0 ; delay_ms(100);
L4 = 0 ; delay_ms(100);
L5 = 0 ; delay_ms(100);
L6 = 0 ; delay_ms(100);
cente = 0 ; delay_ms(100);
R1 = 0 ; delay_ms(100);
R2 = 0 ; delay_ms(100);
R3 = 0 ; delay_ms(100);
R4 = 0 ; delay_ms(100);
R5 = 0 ; delay_ms(100);
R6 = 0 ; delay_ms(100);
cente = 1 ; delay_ms(300);
L6 = R6 = 1 ; delay_ms(300);
L5 = R5 = 1 ; delay_ms(300);
L4 = R4 = 1 ; delay_ms(300);
L3 = R3 = 1 ; delay_ms(300);
L2 = R2 = 1 ; delay_ms(300);
L1 = R1 = 1 ; delay_ms(300);
}
void main(void)
{
TMOD =0x01;
TL0 =0xFF;
TH0 =0xFF;
ET0 =1;
EA =1;
TR0 =1;
P1 = 0xFF ;
P3_0 = P3_1 = P3_3 = P3_5 = 1;
while (1)
{ program1() ;
program2() ;
}
}
. Quan trọng là mình có chịu học hỏi hay không thôi 
Tìm hiểu thêm về tallht
...
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