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標題: AT89C2051紅外遙控解碼（C語言）程序文件 Main.C IR.h [打印本頁]

作者: xiaogu 時間: 2014-12-13 22:42
標題: AT89C2051紅外遙控解碼（C語言）程序文件 Main.C IR.h
#include <reg52.h>
#include "IR.h"

sbit led = P3^7;

void main(void){
cpu_init();
led=1;
while(1){
  P1=~IRdata;
  isirinit=1;
  switch (IRdata){
case 0x45:{    //在這里添加代碼
   led=~led;
break;
}
default:{
isirinit=0;
break;
}
  }
  if (isirinit==1) IRdata=0xff;
}
}

作者: xiaogu 時間: 2014-12-13 22:42
IR.h 文件：

#include <reg52.h>
#define msec_12p5  0x2d00  //Fosc=11.0592MHz
#define msec_15  0x3600
#define msec_9  0x2066
#define msec_2p5  0x900 //#define msec_9  0x1066
#define msec_0p9  0x33d
#define msec_1p68  0x610

typedef enum{
         IR_idle,
         IR_waitstart,
         IR_getaddr,
         IR_getaddrinv,
         IR_getdata,
         IR_getdatainv
         }_IRstate;

_IRstate IRstate = IR_idle;

unsigned char IRaddr=0xff;
unsigned char _IRaddr=0xff;
unsigned char IRdata=0xff;
unsigned char _IRdata=0xff;
unsigned char IR_repeat=0;
unsigned char IR_ready=0;
unsigned char  IR_poweron=0;

bit isirinit=0;  //是否刷新，即接到正確碼

//bit ir_done=0;
// time constants
unsigned int IRtimer=0; // IR timeout

//cpu初始化
void cpu_init(void){
TMOD=0X11; // T0 and T1 十六位定時
TH0=0xee;  //fosc=11.0592M,timer=5ms
TL0=0x00;
TR0=1; // run timer 0;
TF0=0;

ET0=1;  // enable tmr 0 overflow interrupt
IT0=1; // int0 edge sensitive
EX0=1; //  enable "int0"
EA=1; // global interupt enable
}
void tmrint() interrupt 1{ //T0中斷
TH0=0xee;
TL0=0x00;
if (IRtimer)    //IR接收超時
      --IRtimer; //
else
{
      IRstate=IR_idle;
//       IR_poweron=0;
}
}
//void IRint() interrupt 0(void)

//When the IR receive pin goes low and interrupt is generated
// IR is collected by starting timer 2 in the first falling edge of the in
// then on every other falling edge, the timer value is saved and the timer restarted .
// the captured time is then used to get the IR data
// a "start of data" is 13.5Msec,a "1" is 2.25Msec,a "0" is 1.12 msec and a "repeat" is 11.25msec.
// the counter increments at 1.085 Usec
// I allow a fairly large tolerance to time jitter but there are no false triggers seen.

void IRint() interrupt 0{
static unsigned char bits;
unsigned short time;

switch(IRstate)
{
      case IR_idle:
         TL1=0;
         TH1=0;
         TR1=1;
         IRstate=IR_waitstart;
         IRtimer=26;
         break;
      case IR_waitstart: //P2_4=!P2_4;
         TR1=0;
         time=TH1;
         time =(time <<8)+TL1;;
         TL1=0;
         TH1=0;
         TR1=1;
         if ((time > msec_12p5)&&(time < msec_15)) // greater than 12.5Msec & less than 15 msec = start code
         {
            IRaddr=0;
            _IRaddr=0;
            IRdata=0;
            _IRdata=0;
            bits=1;
            IRstate=IR_getaddr;
         }
         else if ((time > msec_9)&&(time <  msec_12p5))// less than 12.5Msec  and greater than 9 msec =Repeat code
         {
            IR_repeat=2;
            IRstate=IR_idle;
         }
         else
         {          // to short, bad data just go to idle
            IRstate=IR_idle;
         }
         break;
      case IR_getaddr: // P2_4=!P2_4;
         TR1=0;
         time=TH1;
         time =(time <<8)+TL1;;
         TL1=0;
         TH1=0;
         TR1=1;
         if ((time>msec_2p5)||(time<msec_0p9))// if  > 2.5msec or shorter than .9Msec bad data , go to idle
         {
            IRstate=IR_idle;
            break;
         }
         if (time>msec_1p68)// greater than 1.68Msec is a 1
         {
            IRaddr|= bits;
         }
         bits=bits<<1;
         if (!bits)
         {
            IRstate=IR_getaddrinv;
            bits=1;
         }
         break;
      case IR_getaddrinv:  //P2_4=!P2_4;
         TR1=0;
         time=TH1;
         time =(time <<8)+TL1;;
         TL1=0;
         TH1=0;
         TR1=1;
         if ((time>msec_2p5)||(time<msec_0p9))// if  > 2.5msec or shorter than .9Msec bad data , go to idle
         {
            IRstate=IR_idle;
            break;
         }
         if (time>msec_1p68)// greater than 1.68Msec is a 1
         {
            _IRaddr|= bits;
         }
         bits=bits<<1;
         if (!bits)
         {
            IRstate=IR_getdata;;
            bits=1;
         }
         break;
      case IR_getdata:
         TR1=0;
         time=TH1;
         time =(time <<8)+TL1;;
         TL1=0;
         TH1=0;
         TR1=1;
         if ((time>msec_2p5)||(time<msec_0p9))// if  > 2.5msec or shorter than .9Msec bad data , go to idle
         {
            IRstate=IR_idle;
            break;
         }
         if (time>msec_1p68)// greater than 1.68Msec is a 1
         {
            IRdata|= bits;
         }
         bits=bits<<1;
         if (!bits)
         {
            IRstate=IR_getdatainv;
            bits=1;
         }
         break;
      case IR_getdatainv:
         TR1=0;
         time=TH1;
         time =(time <<8)+TL1;;
         TL1=0;
         TH1=0;
         TR1=1;
         if ((time>msec_2p5)||(time<msec_0p9)) // if  > 2.5msec or shorter than .9Msec bad data , go to idle
         {
            IRstate=IR_idle;
            break;
         }
         if (time>msec_1p68)// greater than 1.68Msec is a 1
         {
            _IRdata|= bits;
         }
         bits=bits<<1;
         if (!bits)       // we have it all , now we make sure it is a NEC code from the CHS IR transmitter
         {                // make sure address,~address are correct , data ,~data are correct and address is 0.
            IR_ready=((IRaddr^_IRaddr)==0xff)&&((IRdata^_IRdata)==0xff)&&(IRaddr==0);
            if(IR_ready)
            {
                  IRstate=IR_idle;
            }
         }
         break;
      default:
         IRstate=IR_idle;
         break;
}
}

作者: 51hei電控2112312 時間: 2014-12-21 04:35
很好，正需要

作者: bhjyqjs 時間: 2015-6-2 10:03
真不錯的東東，頂一個

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