infrared005.rar

//==================================================== //infrared 红外 //==================================================== #include <reg52.h> #define uint unsigned int #define uchar unsigned char void delay10us(unsigned int t); void delay_ms(unsigned int t); sbit IR=P3^2; uchar sys_code,key_code,buf_code,bit_count,buf_T; uchar inf_state;//inf_state:0空闲状态,1引导码,2系统码sys,3过渡码,4功能码key bit inf_new_flg; //------------------------------------------------------ void main() { TMOD=0x21; TH1=0xfd; TL1=0xfd; TR1=1; PCON=PCON&0x7f; SCON=0x50; EX0=1; IT0=1; PX0=1; EA=1; while(1) { if(inf_new_flg==1) { inf_new_flg=0; SBUF=key_code; while(!TI); TI=0; delay10us(60); } } }//------------------------------------------------------ void int0() interrupt 0 using 0 { EX0=0; TR0=0; buf_T=TH0; switch(inf_state) { case 0: inf_state=1; break; case 1: if(buf_T>0x2B && buf_T<0x2F) inf_state=2; break; case 2: if(buf_T>0x01 && buf_T<0x05)//窄脉冲接收 { buf_code>>=1;//接收0 bit_count++; } else if(buf_T>0x05&&buf_T<0x09)//宽脉冲接收 { buf_code>>=1; buf_code|=0x80;//接收1 bit_count++;//数据脉冲数累加,一共有8 个 } if(bit_count>=8)//若收完8位数据脉冲,则进行以下的处理 { inf_state=3;//标志接收系统进入中间过渡态 bit_count=0; sys_code=buf_code; buf_code=0; } break; case 3: if(buf_T>0x0e&&buf_T<0x12) inf_state=4; break; case 4: if(buf_T>0x01&&buf_T<0x05)//窄脉冲接收 { buf_code>>=1;//接收0 bit_count++; } else if(buf_T>0x05&&buf_T<0x09)//宽脉冲接收 { buf_code>>=1; buf_code|=0x80;//接收1 bit_count++;//数据脉冲数累加,一共有8 个 } if(bit_count>=8)//若收完8位数据脉冲,则进行以下的处理 { inf_state=0;//标志进入空闲状态 bit_count=0; key_code=buf_code; buf_code=0; inf_new_flg=1; //delay_ms(10); } } TL0=0; TH0=0; TR0=1; EX0=1; }//------------------------------------------------------ void delay10us(unsigned int t) { while(t--); }//------------------------------------------------------ void delay_ms(uint t) { uint i; uchar j; for(i=0;i<t;i++) for(j=0;j<125;j++); }//------------------------------------------------------