NEC.rar_NEC遥控解码

#include <AT89X52.H> #define uchar unsigned char sbit check=P2^2; sbit beep=P2^1; uchar irdata[2],irtype,ircount; uchar code table[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xbf}; bit endflag; void init() { irdata[0]=0; irdata[1]=0; irtype=0; ircount=0; endflag=0; check=1; P3=0xfe; } void delay_50ms(unsigned int t) { unsigned int j; for(;t>0;t--) for(j=6245;j>0;j--) {;} } void tim0() interrupt 1 using 0 { bit in=~check; TH0=(65536-1688)/256; TL0=(65536-1688)%256; irdata[irtype]=irdata[irtype]|in; ircount++; if(ircount==3) { irtype=1; } else if(ircount==12) { irtype=2; } else if(irtype==2) { endflag=1; ircount=0; irtype=0; TR0=0; return; } else { irdata[irtype]=irdata[irtype]<<1; } } void delay() { uchar a,b; for(a=20;a!=0;a--) for(b=248;b!=0;b--); } void display() { uchar i; switch(irdata[1]) { case 0x20:i=0;break; case 0x10:i=1;break; case 0x08:i=2;break; case 0x04:i=3;break; case 0x02:i=4;break; case 0x01:i=5;break; case 0xa0:i=6;break; case 0x90:i=7;break; case 0x88:i=8;break; case 0x82:i=9;break; } P0=table[i]; delay(); } void main() { TMOD=0x81; IE=0x82; P0=table[0]; check=1; while(1) { init(); TH0=(65536-844)/256; TL0=(65536-844)%256; while(check); TR0=1; while(!endflag); display(); beep=0; delay_50ms(1); beep=1; } }