yasuyuki onodera
Infrared Rays library
See http://developer.mbed.org/users/yasuyuki/notebook/IRmbed/
Diff: IR.cpp
- Revision:
- 1:71ca050c4d05
- Parent:
- 0:c74b212c3cbf
--- a/IR.cpp Thu Jun 26 13:56:36 2014 +0000
+++ b/IR.cpp Fri Sep 25 17:11:16 2015 +0000
@@ -9,10 +9,10 @@
// logical 0 = on 1T + off 1T
// logical 1 = on 1T + off 3T
// reader=on 16T + off 8T
-// stop=on 1T + 8ms
+// stop=on 1T
// frame=108ms
//
-// (2)Standard IR format
+// (2)AEHA format
// IR carrier=33 - 40KHz
// Time unit=0.35 - 0.50ms
// logical 0 = on 1T + off 1T
@@ -26,18 +26,19 @@
// logical 0 = off 1T + on 1T
// logical 1 = off 1T + on 2T
// reader=on 4T
+// frame=45ms
//
// caution:
// no detecting repeat code, return bits=0;
//
-// (C)Copyright 2014 All rights reserved by Y.Onodera
+// (C)Copyright 2014-2015 All rights reserved by Y.Onodera
// http://einstlab.web.fc2.com
//**********************
#include "mbed.h"
#include "IR.h"
-IR::IR (PinName irin) : _irin(irin){
+IR::IR (PinName irin, PinName irout) : _irin(irin),_irout(irout){
init();
}
@@ -45,9 +46,10 @@
void IR::init()
{
_irin.mode(PullUp);
+ _irout=0;
}
-unsigned char IR::CountHigh(){
+unsigned char IR::countHigh(){
unsigned char i=0;
@@ -57,10 +59,10 @@
++i;
wait_us(26);
wait_us(26);
- if(i==0) return 0;
+ if(i==0) return 0; // timeout
}
// NEC:i=19*8=152, i*2*26.5us=8056us
- // STD:i=19*4=76, i*2*26.5us=4028us
+ // AEHA:i=19*4=76, i*2*26.5us=4028us
// 1T:i=19*1=19
return i;
@@ -68,7 +70,7 @@
}
-unsigned char IR::CountLow(){
+unsigned char IR::countLow(){
unsigned char i=0;
@@ -77,10 +79,10 @@
while(_irin==1){
++i;
wait_us(26);
- if(i==0) return 0;
+ if(i==0) return 0; // timeout
}
// NEC:i=19*8=152, i*26.5us=4028us
- // STD:i=19*4=76, i*26.5us=2014us
+ // AEHA:i=19*4=76, i*26.5us=2014us
// 1T:i=19*1=19
// 3T:i=19*3=57
@@ -89,22 +91,23 @@
}
-void IR::GetIR2(){
+void IR::getIR2(){
- unsigned char i,j;
+ unsigned char i;
+ unsigned short j; // capable 32768 bits = 4096 bytes
unsigned char k;
bits=0;
- for(j=0;j<16;j++){
- for(i=0;i<8;i++){
- k = CountHigh()*2;
+ for(j=0;j<IR_LIMITS;j++){ // buffer bytes LIMITS
+ for(i=0;i<8;i++){ // 8 bits
+ k = countHigh()*2;
if(mode==3){
buf[j]>>=1;
// Threschold = 35, 23 = 1T, 46 = 2T; for SONY
buf[j]+=((k>30) ? 0x80: 0);
++bits;
}
- k = CountLow();
+ k = countLow();
if(k==0){
buf[j]>>=(8-i);
return;
@@ -112,7 +115,7 @@
if(mode!=3){
buf[j]>>=1;
// Threschold = 38, 19 = 1T, 57 = 3T; for NEC
- // Threschold = 30, 15 = 1T, 45 = 3T; for STD
+ // Threschold = 30, 15 = 1T, 45 = 3T; for AEHA
buf[j]+=((k>30) ? 0x80: 0);
++bits;
}
@@ -122,11 +125,11 @@
}
-void IR::GetIR(){
+void IR::getIR(){
unsigned char i;
- i = CountHigh(); // Start
+ i = countHigh(); // Start
mode=0;
if(40<i){
if(i<51){
@@ -135,11 +138,156 @@
if(100<i){
mode=1; // NEC, 173
}else{
- mode=2; // STD, 54-77
+ mode=2; // AEHA, 54-77
}
}
- i = CountLow();
- GetIR2();
+ i = countLow();
+ getIR2();
}
}
+
+
+// out ON with 38KHz
+void IR::outON(char n, char t)
+{
+
+ unsigned char i,j;
+
+ for(j=0;j<t;j++){
+ for(i=0;i<n;i++){
+ // 38KHz, 1/3duty
+ _irout=1; // LED ON=8.6ms
+ wait_us(6);
+ _irout=0; // LED OFF=17.4ms
+ wait_us(15);
+ }
+ }
+
+}
+
+// out OFF without 38KHz
+void IR::outOFF(char n, char t)
+{
+
+ unsigned char i,j;
+
+ for(j=0;j<t;j++){
+ for(i=0;i<n;i++){
+ // 38KHz, 1/3duty
+ _irout=0; // LED OFF
+ wait_us(6);
+ _irout=0; // LED OFF
+ wait_us(15);
+ }
+ }
+
+}
+
+
+void IR::setIR()
+{
+
+ unsigned char j,t;
+ unsigned short i,n;
+
+ if(bits==0)return; // no data
+
+ // reader
+ switch(mode){
+ case 1:
+ if(bits!=32)return;
+ outON(NEC,16); // ON(16T)
+ outOFF(NEC,8); // OFF(8T)
+ t=16+8;
+ break;
+ case 2:
+ if(bits>IR_LIMITS*8)return;
+ outON(AEHA,8); // ON(8T)
+ outOFF(AEHA,4); // OFF(4T)
+ t=8+4;
+ break;
+ case 3:
+ if(!(bits==12 || bits==15 || bits==20))return;
+ outON(SONY,4); // ON(4T)
+ t=4;
+ break;
+ }
+
+ // data
+ switch(mode){
+ case 1:
+ for(i=0;i<4;i++){
+ for(j=0;j<8;j++){
+ if(buf[i] & (0x1<<j)){
+ outON(NEC,1); // ON(1T)
+ outOFF(NEC,3); // OFF(3T)
+ t+=4;
+ }else{
+ outON(NEC,1); // ON(1T)
+ outOFF(NEC,1); // OFF(1T)
+ t+=2;
+ }
+ }
+ }
+ break;
+ case 2:
+ i=0;
+ n=0;
+ do{
+ for(j=0;j<8;j++){
+ if(buf[i] & (0x1<<j)){
+ outON(AEHA,1); // ON(1T)
+ outOFF(AEHA,3); // OFF(3T)
+ t+=4;
+ }else{
+ outON(AEHA,1); // ON(1T)
+ outOFF(AEHA,1); // OFF(1T)
+ t+=2;
+ }
+ if(++n == bits)break;
+ }
+ ++i;
+ }while(n < bits && i<IR_LIMITS);
+ break;
+ case 3:
+ i=0;
+ n=0;
+ do{
+ for(j=0;j<8;j++){
+ if(buf[i] & (0x1<<j)){
+ outOFF(SONY,1); // OFF(1T)
+ outON(SONY,2); // ON(2T)
+ t+=3;
+ }else{
+ outOFF(SONY,1); // OFF(1T)
+ outON(SONY,1); // ON(1T)
+ t+=2;
+ }
+ if(++n == bits)break;
+ }
+ ++i;
+ }while(n < bits && i<IR_LIMITS);
+ break;
+ }
+
+ // stop
+ switch(mode){
+ case 1:
+ t=192-t;
+ outON(NEC,1); // ON(1T)
+ outOFF(NEC,t); // frame=108ms=192T
+ break;
+ case 2:
+ outON(AEHA,1); // ON(1T)
+ outOFF(AEHA,16); // 8ms=16T
+ break;
+ case 3:
+ t=75-t;
+ outOFF(SONY,t); // frame=45ms=75T
+ break;
+ }
+
+}
+
+