).
. Viết code thì tôi ok rồi, nhưng không biết cái mạch ráp sao nữa nên mới hỏi xin các bác cái sơ đồ nguyên lý thôi. Bác nào có cho em xin cái 
Tweet
Dùng 8051 tạo ra nhạc ?
#include<AT89S53.h>
unsigned char preloadTH=0xFF,preloadTL=0xFF;
unsigned int pointer=0,ii=0,jj;
//octa: 0
//key C C# D D# E F F# G G# A A# B
code 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};
code unsigned int chuan=200;
code float crystal=11.0592;
//music
code unsigned char music[]=
{
"4d~,4d~,3g~,3a~,4d.,4d~,4g~,4a~,4b~,4a=,4g=,4d.,4e~,3a~,4c~,3g~,3a~,4d~,4d ,4d=,4c=,3a~,4c~,3g~,3a~,4do",
"4g~,4g~,4d~,3a~,4g.,4g~,4a~,4g~,4b=,4a=,4g~,4d.,4g~,4e ,4e~,4d~,4c ,4d~,4d~,3a~,4d~,3b~,3a~,3go,4d ,4go",
"4go,4a ,4b~,4a~,4F~,4g.,4d~,4g~,4a~,4a=,4b=,4a~,4g.,4d~,3a ,3a ,3a~,4d ,4d~,4d ,3a=,3b=,3a~,3g.,4b=,4a=",
"4g~,4d~,4g~,4d~,3a.,4g~,4g ,4F~,4a~,5d.,4a=,4b=,4d ,3a ,4go,4d~,4d~,3g~,3a~,4do,4g~,4g~,4d~,3a~,4go,4g~",
"4d~,4g~,4a~,4A ,4a~,5d~,4b~,4a~,4g~,4F~,4g ,4d ,4d ,4g~,4a~,4A ,4a~,5d~,4b~,4a~,4g~,4F~,4go,s"
};
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 '1' : tanso*=2; break;
case '2' : tanso*=4; break;
case '3' : tanso*=8; break;
case '4' : tanso*=16; break;
case '5' : tanso*=32; break;
case '6' : tanso*=64; break;
case '7' : tanso*=128; break;
case '8' : tanso*=256; 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); break;
case '~' : return trave(chuan*2); break;
case ' ' : return trave(chuan*4); break;
case '.' : return trave(chuan*6); break;
case 'o' : return trave(chuan*8); break;
}
}
unsigned char ngattimer_0() interrupt 1
{
P2_0=!P2_0;
TL0=preloadTL;
TH0=preloadTH;
if(ii==0)
{
if(music[pointer]=='s')
TR0=0;
key(music[pointer],music[pointer+1]);
jj=tempo(music[pointer+2]);
}
ii++;
if(ii==jj)
{
ii=0;
pointer+=4;
}
}
void main(void)
{
TMOD=17;
TL0=0xff;
TH0=0xff;
ET0=1;
EA=1;
TR0=1;
while(1);
}
unsigned char ngattimer_0() interrupt 1
Tìm hiểu thêm về hoainamctin
Comment