Hyeonjong Lee / IRremote

IRremote

IRremote.cpp@4:10a04fa41876, 2013-12-31 (annotated)

Committer:
leejong87
Date:
Tue Dec 31 03:57:56 2013 +0000
Revision:
4:10a04fa41876
Parent:
3:1ec19fef8a30 
add function : data clear

Who changed what in which revision?

UserRevisionLine numberNew contents of line
leejong87 0:fe20e27c6295 1 #include "IRremote.h"
leejong87 0:fe20e27c6295 2 #include "mbed.h"
leejong87 0:fe20e27c6295 3
leejong87 0:fe20e27c6295 4 int IR_cnt, IR_state, IR_bit_cnt, IR_temp;
leejong87 4:10a04fa41876 5 char IR_buf[4]={0xFF,0xFF,0xFF,0xFF};
leejong87 2:4f0d37840b59 6 //IR Timer
leejong87 0:fe20e27c6295 7 void IR_check()
leejong87 0:fe20e27c6295 8 {
leejong87 0:fe20e27c6295 9 if(IR_cnt<150) {
leejong87 0:fe20e27c6295 10 IR_cnt++;
leejong87 0:fe20e27c6295 11 }
leejong87 0:fe20e27c6295 12 if(IR_cnt>=150) {
leejong87 0:fe20e27c6295 13 IR_state=1;
leejong87 0:fe20e27c6295 14 }
leejong87 0:fe20e27c6295 15 }
leejong87 0:fe20e27c6295 16
leejong87 2:4f0d37840b59 17 //IR Receive
leejong87 0:fe20e27c6295 18 void IR_start()
leejong87 0:fe20e27c6295 19 {
leejong87 0:fe20e27c6295 20 switch(IR_state) {
leejong87 0:fe20e27c6295 21 case 1:
leejong87 0:fe20e27c6295 22 if((IR_cnt>85)&&(IR_cnt<140)) {
leejong87 0:fe20e27c6295 23 IR_state=2; // Lead
leejong87 0:fe20e27c6295 24 IR_bit_cnt=IR_temp=0;
leejong87 0:fe20e27c6295 25 }
leejong87 0:fe20e27c6295 26 break;
leejong87 0:fe20e27c6295 27 case 2:
leejong87 0:fe20e27c6295 28 if(IR_cnt> 25) {
leejong87 0:fe20e27c6295 29 IR_state=1; // Error
leejong87 0:fe20e27c6295 30 break;
leejong87 0:fe20e27c6295 31 } else if(IR_cnt>=15) {
leejong87 0:fe20e27c6295 32 IR_temp|=0x80; // Data 1 : 2.250ms(22)(0.56ms+1.69ms ) / 2ms
leejong87 0:fe20e27c6295 33 } else if(IR_cnt>= 8) {
leejong87 0:fe20e27c6295 34 IR_temp|=0x00; // Data 0 : 1.125ms(12)(0.56ms+0.565ms) / 1ms
leejong87 0:fe20e27c6295 35 } else {
leejong87 0:fe20e27c6295 36 IR_state=1; // Error
leejong87 0:fe20e27c6295 37 break;
leejong87 0:fe20e27c6295 38 }
leejong87 0:fe20e27c6295 39 if((++IR_bit_cnt%8)==0) {
leejong87 0:fe20e27c6295 40 IR_buf[(IR_bit_cnt/8)-1]=IR_temp;
leejong87 0:fe20e27c6295 41 IR_temp=0;
leejong87 0:fe20e27c6295 42 if(IR_bit_cnt>=32) {
leejong87 0:fe20e27c6295 43 IR_state=1;
leejong87 0:fe20e27c6295 44 IR_bit_cnt=0;
leejong87 0:fe20e27c6295 45 }
leejong87 0:fe20e27c6295 46 }
leejong87 0:fe20e27c6295 47 IR_temp>>=1;
leejong87 0:fe20e27c6295 48 break;
leejong87 0:fe20e27c6295 49 }
leejong87 0:fe20e27c6295 50 IR_cnt=0;
leejong87 0:fe20e27c6295 51 }
leejong87 0:fe20e27c6295 52
leejong87 0:fe20e27c6295 53 IRremote::IRremote(PinName pin) : _pin(pin)
leejong87 0:fe20e27c6295 54 {
leejong87 0:fe20e27c6295 55 _pin.mode(PullUp);
leejong87 0:fe20e27c6295 56 _pin.fall(&IR_start);
leejong87 0:fe20e27c6295 57 IR_timer.attach_us(&IR_check, 100.0);
leejong87 0:fe20e27c6295 58 }
leejong87 0:fe20e27c6295 59
leejong87 0:fe20e27c6295 60 char IRremote::read(int ir_i)
leejong87 0:fe20e27c6295 61 {
leejong87 3:1ec19fef8a30 62 return IR_buf[ir_i];
leejong87 4:10a04fa41876 63 }
leejong87 4:10a04fa41876 64 char IRremote::readclear(int ir_i)
leejong87 4:10a04fa41876 65 {
leejong87 4:10a04fa41876 66 char IR_rx;
leejong87 4:10a04fa41876 67 IR_rx = IR_buf[ir_i];
leejong87 4:10a04fa41876 68 IR_buf[ir_i]=0xFF;
leejong87 4:10a04fa41876 69 return IR_rx;
leejong87 4:10a04fa41876 70 }
leejong87 4:10a04fa41876 71 void IRremote::clear()
leejong87 4:10a04fa41876 72 {
leejong87 4:10a04fa41876 73 for(int i=0; i<4; i++) {
leejong87 4:10a04fa41876 74 IR_buf[i]=0xFF;
leejong87 4:10a04fa41876 75 }
leejong87 4:10a04fa41876 76 }