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81 lines
3.5 KiB
81 lines
3.5 KiB
/* IRLib_P01_NEC.h
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* Part of IRLib Library for Arduino receiving, decoding, and sending
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* infrared signals. See COPYRIGHT.txt and LICENSE.txt for more information.
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*/
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/*
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* NEC is an extremely common protocol. There are two variations NEC1 and NEC2.
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* They differ only in the way in which they handle repeat codes. If you hold a button
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* using NEC1 it does not repeat the same sequence. Rather it sends a special sequence
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* consisting of the usual header mark, a half-size header space, a normal mark.
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* When IRLib receives one of these special repeat sequences, it returns the
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* value REPEAT_CODE which is defined in IRLibProtocols.h as the value 0xffffffff. If you
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* send REPEAT_CODE, the send routine will create a special sequence for you.
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* NOTE that the timing for this special did sequence is nearly identical to a ditto
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* used by the G.I.Cable protocol and IRLib generally not distinguish between the two.
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* The header timing for G.I. Cable ditto is 8820,1960 and for NEC is 9024,2256
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* If you are using both protocols and you receive an NEC ditto immediately after
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* receiving a G.I.Cable then you should presume it is a G.I.Cable and vice versa.
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* Whether it is a normal code or a repeat code the entire frame has a 108ms extent.
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* The IRP notation for these protocols are:
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* NEC1: {38k,564}<1,-1|1,-3>(16,-8,D:8,S:8,F:8,~F:8,1,^108,(16,-4,1,^108)*)
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* NEC2: {38k,564}<1,-1|1,-3>(16,-8,D:8,S:8,F:8,~F:8,1,^108)+
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* Other protocols use the same timing and 32 bits of data but they interpret the data fields
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* differently. These include Apple and TiVo. Also Pioneer protocol is identical to NEC2
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* however uses 40k rather than 38k modulation. Pioneer sometimes requires a 2 frame
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* sequence of different data for a single pushbutton function. The optional 2nd
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* parameter to the "send" method allows you to change the frequency from the default 38.
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*/
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#ifndef IRLIB_PROTOCOL_01_H
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#define IRLIB_PROTOCOL_01_H
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#define IR_SEND_PROTOCOL_01 case 1: if(data2==0)data2=38;IRsendNEC::send(data,data2); break;
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#define IR_DECODE_PROTOCOL_01 if(IRdecodeNEC::decode()) return true;
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#ifdef IRLIB_HAVE_COMBO
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#define PV_IR_DECODE_PROTOCOL_01 ,public virtual IRdecodeNEC
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#define PV_IR_SEND_PROTOCOL_01 ,public virtual IRsendNEC
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#else
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#define PV_IR_DECODE_PROTOCOL_01 public virtual IRdecodeNEC
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#define PV_IR_SEND_PROTOCOL_01 public virtual IRsendNEC
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#endif
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#ifdef IRLIBSENDBASE_H
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class IRsendNEC: public virtual IRsendBase {
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public:
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void send(uint32_t data, uint8_t kHz=38) {
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if (data==REPEAT_CODE) {
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enableIROut(kHz);
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mark (564* 16); space(564*4); mark(564);space(572);delay(97);//actually 97572us
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} else {
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sendGeneric(data,32, 564*16, 564*8, 564, 564, 564*3, 564, kHz, true,108000);
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}
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};
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};
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#endif //IRLIBSENDBASE_H
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#ifdef IRLIBDECODEBASE_H
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class IRdecodeNEC: public virtual IRdecodeBase {
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public:
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bool decode(void) {
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resetDecoder();//This used to be in the receiver getResults.
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IRLIB_ATTEMPT_MESSAGE(F("NEC repeat"));
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// Check for repeat
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if (recvGlobal.decodeLength == 4 && MATCH(recvGlobal.decodeBuffer[1],564*16) && MATCH(recvGlobal.decodeBuffer[2],564*4)
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&& MATCH(recvGlobal.decodeBuffer[3],564)) {
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bits = 0;
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value = REPEAT_CODE;
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protocolNum = NEC;
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return true;
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}
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IRLIB_ATTEMPT_MESSAGE(F("NEC"));
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if(!decodeGeneric(68, 564*16, 564*8, 564, 564*3, 564)) return false;
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protocolNum = NEC;
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return true;
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}
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};
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#endif //IRLIBDECODEBASE_H
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#define IRLIB_HAVE_COMBO
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#endif //IRLIB_PROTOCOL_01_H
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