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Fork of RemoteIR by Shinichiro Nakamura

ReceiverIR.cpp@0:ec264f4ce158, 2010-08-17 (annotated)

Committer:: shintamainjp
Date:: Tue Aug 17 08:50:54 2010 +0000
Revision:: 0:ec264f4ce158
Child:: 1:4adf16017a0f

Who changed what in which revision?

User	Revision	Line number	New contents of line
shintamainjp	0:ec264f4ce158	1	/**
shintamainjp	0:ec264f4ce158	2	* IR receiver (Version 0.0.3)
shintamainjp	0:ec264f4ce158	3	*
shintamainjp	0:ec264f4ce158	4	* Copyright (C) 2010 Shinichiro Nakamura (CuBeatSystems)
shintamainjp	0:ec264f4ce158	5	* http://shinta.main.jp/
shintamainjp	0:ec264f4ce158	6	*/
shintamainjp	0:ec264f4ce158	7
shintamainjp	0:ec264f4ce158	8	#include "ReceiverIR.h"
shintamainjp	0:ec264f4ce158	9
shintamainjp	0:ec264f4ce158	10	#define IRQ_ENABLE() sem.release(); __enable_irq()
shintamainjp	0:ec264f4ce158	11	#define IRQ_DISABLE() sem.take(); __disable_irq()
shintamainjp	0:ec264f4ce158	12
shintamainjp	0:ec264f4ce158	13	#define InRange(x,y) ((((y) * 0.7) < (x)) && ((x) < ((y) * 1.3)))
shintamainjp	0:ec264f4ce158	14
shintamainjp	0:ec264f4ce158	15	ReceiverIR::ReceiverIR(PinName rxpin) : evt(rxpin) {
shintamainjp	0:ec264f4ce158	16	}
shintamainjp	0:ec264f4ce158	17
shintamainjp	0:ec264f4ce158	18	ReceiverIR::~ReceiverIR() {}
shintamainjp	0:ec264f4ce158	19
shintamainjp	0:ec264f4ce158	20	void ReceiverIR::init(void) {
shintamainjp	0:ec264f4ce158	21	IRQ_DISABLE();
shintamainjp	0:ec264f4ce158	22	evt.fall(this, &ReceiverIR::isr_fall);
shintamainjp	0:ec264f4ce158	23	evt.rise(this, &ReceiverIR::isr_rise);
shintamainjp	0:ec264f4ce158	24	evt.mode(PullUp);
shintamainjp	0:ec264f4ce158	25	ticker.attach_us(this, &ReceiverIR::isr_wdt, 10 * 1000);
shintamainjp	0:ec264f4ce158	26	init_state();
shintamainjp	0:ec264f4ce158	27	IRQ_ENABLE();
shintamainjp	0:ec264f4ce158	28	}
shintamainjp	0:ec264f4ce158	29
shintamainjp	0:ec264f4ce158	30	ReceiverIR::State ReceiverIR::getState() {
shintamainjp	0:ec264f4ce158	31	IRQ_DISABLE();
shintamainjp	0:ec264f4ce158	32	State s = data.state;
shintamainjp	0:ec264f4ce158	33	IRQ_ENABLE();
shintamainjp	0:ec264f4ce158	34	wait_ms(100);
shintamainjp	0:ec264f4ce158	35	return s;
shintamainjp	0:ec264f4ce158	36	}
shintamainjp	0:ec264f4ce158	37
shintamainjp	0:ec264f4ce158	38	int ReceiverIR::getData(RemoteIR::Format format, uint8_t buf, int bufsiz) {
shintamainjp	0:ec264f4ce158	39	IRQ_DISABLE();
shintamainjp	0:ec264f4ce158	40
shintamainjp	0:ec264f4ce158	41	const int bitcount = data.bitcount;
shintamainjp	0:ec264f4ce158	42	const int n = bitcount / 8 + (((bitcount % 8) != 0) ? 1 : 0);
shintamainjp	0:ec264f4ce158	43	if (bufsiz < n) {
shintamainjp	0:ec264f4ce158	44	IRQ_ENABLE();
shintamainjp	0:ec264f4ce158	45	return -1;
shintamainjp	0:ec264f4ce158	46	}
shintamainjp	0:ec264f4ce158	47
shintamainjp	0:ec264f4ce158	48	*format = data.format;
shintamainjp	0:ec264f4ce158	49	for (int i = 0; i < n; i++) {
shintamainjp	0:ec264f4ce158	50	buf[i] = data.buffer[i];
shintamainjp	0:ec264f4ce158	51	}
shintamainjp	0:ec264f4ce158	52
shintamainjp	0:ec264f4ce158	53	init_state();
shintamainjp	0:ec264f4ce158	54
shintamainjp	0:ec264f4ce158	55	IRQ_ENABLE();
shintamainjp	0:ec264f4ce158	56	return bitcount;
shintamainjp	0:ec264f4ce158	57	}
shintamainjp	0:ec264f4ce158	58
shintamainjp	0:ec264f4ce158	59	void ReceiverIR::init_state(void) {
shintamainjp	0:ec264f4ce158	60	work.c1 = -1;
shintamainjp	0:ec264f4ce158	61	work.c2 = -1;
shintamainjp	0:ec264f4ce158	62	work.c3 = -1;
shintamainjp	0:ec264f4ce158	63	work.d1 = -1;
shintamainjp	0:ec264f4ce158	64	work.d2 = -1;
shintamainjp	0:ec264f4ce158	65	data.state = Idle;
shintamainjp	0:ec264f4ce158	66	data.format = RemoteIR::UNKNOWN;
shintamainjp	0:ec264f4ce158	67	data.bitcount = 0;
shintamainjp	0:ec264f4ce158	68	timer.stop();
shintamainjp	0:ec264f4ce158	69	timer.reset();
shintamainjp	0:ec264f4ce158	70	for (int i = 0; i < sizeof(data.buffer); i++) {
shintamainjp	0:ec264f4ce158	71	data.buffer[i] = 0;
shintamainjp	0:ec264f4ce158	72	}
shintamainjp	0:ec264f4ce158	73	}
shintamainjp	0:ec264f4ce158	74
shintamainjp	0:ec264f4ce158	75	void ReceiverIR::isr_wdt(void) {
shintamainjp	0:ec264f4ce158	76	IRQ_DISABLE();
shintamainjp	0:ec264f4ce158	77	static int cnt = 0;
shintamainjp	0:ec264f4ce158	78	if ((Idle != data.state) \|\| ((0 <= work.c1) \|\| (0 <= work.c2) \|\| (0 <= work.c3) \|\| (0 <= work.d1) \|\| (0 <= work.d2))) {
shintamainjp	0:ec264f4ce158	79	cnt++;
shintamainjp	0:ec264f4ce158	80	if (cnt > 50) {
shintamainjp	0:ec264f4ce158	81	#if 0
shintamainjp	0:ec264f4ce158	82	printf("# WDT [c1=%d, c2=%d, c3=%d, d1=%d, d2=%d, state=%d, format=%d, bitcount=%d]\n",
shintamainjp	0:ec264f4ce158	83	work.c1,
shintamainjp	0:ec264f4ce158	84	work.c2,
shintamainjp	0:ec264f4ce158	85	work.c3,
shintamainjp	0:ec264f4ce158	86	work.d1,
shintamainjp	0:ec264f4ce158	87	work.d2,
shintamainjp	0:ec264f4ce158	88	data.state,
shintamainjp	0:ec264f4ce158	89	data.format,
shintamainjp	0:ec264f4ce158	90	data.bitcount);
shintamainjp	0:ec264f4ce158	91	#endif
shintamainjp	0:ec264f4ce158	92	init_state();
shintamainjp	0:ec264f4ce158	93	cnt = 0;
shintamainjp	0:ec264f4ce158	94	}
shintamainjp	0:ec264f4ce158	95	} else {
shintamainjp	0:ec264f4ce158	96	cnt = 0;
shintamainjp	0:ec264f4ce158	97	}
shintamainjp	0:ec264f4ce158	98	IRQ_ENABLE();
shintamainjp	0:ec264f4ce158	99	}
shintamainjp	0:ec264f4ce158	100
shintamainjp	0:ec264f4ce158	101	void ReceiverIR::isr_fall(void) {
shintamainjp	0:ec264f4ce158	102	IRQ_DISABLE();
shintamainjp	0:ec264f4ce158	103	switch (data.state) {
shintamainjp	0:ec264f4ce158	104	case Idle:
shintamainjp	0:ec264f4ce158	105	if (work.c1 < 0) {
shintamainjp	0:ec264f4ce158	106	timer.start();
shintamainjp	0:ec264f4ce158	107	work.c1 = timer.read_us();
shintamainjp	0:ec264f4ce158	108	} else {
shintamainjp	0:ec264f4ce158	109	work.c3 = timer.read_us();
shintamainjp	0:ec264f4ce158	110	int a = work.c2 - work.c1;
shintamainjp	0:ec264f4ce158	111	int b = work.c3 - work.c2;
shintamainjp	0:ec264f4ce158	112	if (InRange(a, TUS_NEC * 16) && InRange(b, TUS_NEC * 8)) {
shintamainjp	0:ec264f4ce158	113	/*
shintamainjp	0:ec264f4ce158	114	* NEC.
shintamainjp	0:ec264f4ce158	115	*/
shintamainjp	0:ec264f4ce158	116	data.format = RemoteIR::NEC;
shintamainjp	0:ec264f4ce158	117	data.state = Receiving;
shintamainjp	0:ec264f4ce158	118	data.bitcount = 0;
shintamainjp	0:ec264f4ce158	119	} else if (InRange(a, TUS_NEC * 16) && InRange(b, TUS_NEC * 4)) {
shintamainjp	0:ec264f4ce158	120	/*
shintamainjp	0:ec264f4ce158	121	* NEC Repeat.
shintamainjp	0:ec264f4ce158	122	*/
shintamainjp	0:ec264f4ce158	123	data.format = RemoteIR::NEC;
shintamainjp	0:ec264f4ce158	124	data.state = Received;
shintamainjp	0:ec264f4ce158	125	data.bitcount = 0;
shintamainjp	0:ec264f4ce158	126	} else if (InRange(a, TUS_AEHA * 8) && InRange(b, TUS_AEHA * 4)) {
shintamainjp	0:ec264f4ce158	127	/*
shintamainjp	0:ec264f4ce158	128	* AEHA.
shintamainjp	0:ec264f4ce158	129	*/
shintamainjp	0:ec264f4ce158	130	data.format = RemoteIR::AEHA;
shintamainjp	0:ec264f4ce158	131	data.state = Receiving;
shintamainjp	0:ec264f4ce158	132	data.bitcount = 0;
shintamainjp	0:ec264f4ce158	133	} else if (InRange(a, TUS_AEHA * 8) && InRange(b, TUS_AEHA * 8)) {
shintamainjp	0:ec264f4ce158	134	/*
shintamainjp	0:ec264f4ce158	135	* AEHA Repeat.
shintamainjp	0:ec264f4ce158	136	*/
shintamainjp	0:ec264f4ce158	137	data.format = RemoteIR::AEHA;
shintamainjp	0:ec264f4ce158	138	data.state = Received;
shintamainjp	0:ec264f4ce158	139	data.bitcount = 0;
shintamainjp	0:ec264f4ce158	140	} else {
shintamainjp	0:ec264f4ce158	141	init_state();
shintamainjp	0:ec264f4ce158	142	}
shintamainjp	0:ec264f4ce158	143	}
shintamainjp	0:ec264f4ce158	144	break;
shintamainjp	0:ec264f4ce158	145	case Receiving:
shintamainjp	0:ec264f4ce158	146	if (RemoteIR::NEC == data.format) {
shintamainjp	0:ec264f4ce158	147	work.d2 = timer.read_us();
shintamainjp	0:ec264f4ce158	148	int a = work.d2 - work.d1;
shintamainjp	0:ec264f4ce158	149	if (InRange(a, TUS_NEC * 3)) {
shintamainjp	0:ec264f4ce158	150	data.buffer[data.bitcount / 8] \|= (1 << (data.bitcount % 8));
shintamainjp	0:ec264f4ce158	151	} else if (InRange(a, TUS_NEC * 1)) {
shintamainjp	0:ec264f4ce158	152	data.buffer[data.bitcount / 8] &= ~(1 << (data.bitcount % 8));
shintamainjp	0:ec264f4ce158	153	}
shintamainjp	0:ec264f4ce158	154	data.bitcount++;
shintamainjp	0:ec264f4ce158	155	#if 1
shintamainjp	0:ec264f4ce158	156	/*
shintamainjp	0:ec264f4ce158	157	* Length of NEC is always 32 bits.
shintamainjp	0:ec264f4ce158	158	*/
shintamainjp	0:ec264f4ce158	159	if (32 <= data.bitcount) {
shintamainjp	0:ec264f4ce158	160	data.state = Received;
shintamainjp	0:ec264f4ce158	161	work.c1 = -1;
shintamainjp	0:ec264f4ce158	162	work.c2 = -1;
shintamainjp	0:ec264f4ce158	163	work.c3 = -1;
shintamainjp	0:ec264f4ce158	164	work.d1 = -1;
shintamainjp	0:ec264f4ce158	165	work.d2 = -1;
shintamainjp	0:ec264f4ce158	166	}
shintamainjp	0:ec264f4ce158	167	#else
shintamainjp	0:ec264f4ce158	168	/*
shintamainjp	0:ec264f4ce158	169	* Set timeout for tail detection automatically.
shintamainjp	0:ec264f4ce158	170	*/
shintamainjp	0:ec264f4ce158	171	timeout.detach();
shintamainjp	0:ec264f4ce158	172	timeout.attach_us(this, &ReceiverIR::isr_timeout, TUS_NEC * 12);
shintamainjp	0:ec264f4ce158	173	#endif
shintamainjp	0:ec264f4ce158	174	} else if (RemoteIR::AEHA == data.format) {
shintamainjp	0:ec264f4ce158	175	work.d2 = timer.read_us();
shintamainjp	0:ec264f4ce158	176	int a = work.d2 - work.d1;
shintamainjp	0:ec264f4ce158	177	if (InRange(a, TUS_AEHA * 3)) {
shintamainjp	0:ec264f4ce158	178	data.buffer[data.bitcount / 8] \|= (1 << (data.bitcount % 8));
shintamainjp	0:ec264f4ce158	179	} else if (InRange(a, TUS_AEHA * 1)) {
shintamainjp	0:ec264f4ce158	180	data.buffer[data.bitcount / 8] &= ~(1 << (data.bitcount % 8));
shintamainjp	0:ec264f4ce158	181	}
shintamainjp	0:ec264f4ce158	182	data.bitcount++;
shintamainjp	0:ec264f4ce158	183	#if 1
shintamainjp	0:ec264f4ce158	184	/*
shintamainjp	0:ec264f4ce158	185	* Typical length of AEHA is 48 bits.
shintamainjp	0:ec264f4ce158	186	* Please check a specification of your remote controller if you find a problem.
shintamainjp	0:ec264f4ce158	187	*/
shintamainjp	0:ec264f4ce158	188	if (48 <= data.bitcount) {
shintamainjp	0:ec264f4ce158	189	data.state = Received;
shintamainjp	0:ec264f4ce158	190	work.c1 = -1;
shintamainjp	0:ec264f4ce158	191	work.c2 = -1;
shintamainjp	0:ec264f4ce158	192	work.c3 = -1;
shintamainjp	0:ec264f4ce158	193	work.d1 = -1;
shintamainjp	0:ec264f4ce158	194	work.d2 = -1;
shintamainjp	0:ec264f4ce158	195	}
shintamainjp	0:ec264f4ce158	196	#else
shintamainjp	0:ec264f4ce158	197	/*
shintamainjp	0:ec264f4ce158	198	* Set timeout for tail detection automatically.
shintamainjp	0:ec264f4ce158	199	*/
shintamainjp	0:ec264f4ce158	200	timeout.detach();
shintamainjp	0:ec264f4ce158	201	timeout.attach_us(this, &ReceiverIR::isr_timeout, TUS_AEHA * 12);
shintamainjp	0:ec264f4ce158	202	#endif
shintamainjp	0:ec264f4ce158	203	} else if (RemoteIR::SONY == data.format) {
shintamainjp	0:ec264f4ce158	204	work.d1 = timer.read_us();
shintamainjp	0:ec264f4ce158	205	}
shintamainjp	0:ec264f4ce158	206	break;
shintamainjp	0:ec264f4ce158	207	case Received:
shintamainjp	0:ec264f4ce158	208	break;
shintamainjp	0:ec264f4ce158	209	default:
shintamainjp	0:ec264f4ce158	210	break;
shintamainjp	0:ec264f4ce158	211	}
shintamainjp	0:ec264f4ce158	212	IRQ_ENABLE();
shintamainjp	0:ec264f4ce158	213	}
shintamainjp	0:ec264f4ce158	214
shintamainjp	0:ec264f4ce158	215	void ReceiverIR::isr_rise(void) {
shintamainjp	0:ec264f4ce158	216	IRQ_DISABLE();
shintamainjp	0:ec264f4ce158	217	switch (data.state) {
shintamainjp	0:ec264f4ce158	218	case Idle:
shintamainjp	0:ec264f4ce158	219	if (0 <= work.c1) {
shintamainjp	0:ec264f4ce158	220	work.c2 = timer.read_us();
shintamainjp	0:ec264f4ce158	221	int a = work.c2 - work.c1;
shintamainjp	0:ec264f4ce158	222	if (InRange(a, TUS_SONY * 4)) {
shintamainjp	0:ec264f4ce158	223	data.format = RemoteIR::SONY;
shintamainjp	0:ec264f4ce158	224	data.state = Receiving;
shintamainjp	0:ec264f4ce158	225	data.bitcount = 0;
shintamainjp	0:ec264f4ce158	226	} else {
shintamainjp	0:ec264f4ce158	227	static const int MINIMUM_LEADER_WIDTH = 150;
shintamainjp	0:ec264f4ce158	228	if (a < MINIMUM_LEADER_WIDTH) {
shintamainjp	0:ec264f4ce158	229	init_state();
shintamainjp	0:ec264f4ce158	230	}
shintamainjp	0:ec264f4ce158	231	}
shintamainjp	0:ec264f4ce158	232	} else {
shintamainjp	0:ec264f4ce158	233	init_state();
shintamainjp	0:ec264f4ce158	234	}
shintamainjp	0:ec264f4ce158	235	break;
shintamainjp	0:ec264f4ce158	236	case Receiving:
shintamainjp	0:ec264f4ce158	237	if (RemoteIR::NEC == data.format) {
shintamainjp	0:ec264f4ce158	238	work.d1 = timer.read_us();
shintamainjp	0:ec264f4ce158	239	} else if (RemoteIR::AEHA == data.format) {
shintamainjp	0:ec264f4ce158	240	work.d1 = timer.read_us();
shintamainjp	0:ec264f4ce158	241	} else if (RemoteIR::SONY == data.format) {
shintamainjp	0:ec264f4ce158	242	work.d2 = timer.read_us();
shintamainjp	0:ec264f4ce158	243	int a = work.d2 - work.d1;
shintamainjp	0:ec264f4ce158	244	if (InRange(a, TUS_SONY * 2)) {
shintamainjp	0:ec264f4ce158	245	data.buffer[data.bitcount / 8] \|= (1 << (data.bitcount % 8));
shintamainjp	0:ec264f4ce158	246	} else if (InRange(a, TUS_SONY * 1)) {
shintamainjp	0:ec264f4ce158	247	data.buffer[data.bitcount / 8] &= ~(1 << (data.bitcount % 8));
shintamainjp	0:ec264f4ce158	248	}
shintamainjp	0:ec264f4ce158	249	data.bitcount++;
shintamainjp	0:ec264f4ce158	250	#if 1
shintamainjp	0:ec264f4ce158	251	/*
shintamainjp	0:ec264f4ce158	252	* How do we get the correct length? (6bits, 12bits, 15bits, 20bits...)
shintamainjp	0:ec264f4ce158	253	* By a model only?
shintamainjp	0:ec264f4ce158	254	* Please check a specification of your remote controller if you find a problem.
shintamainjp	0:ec264f4ce158	255	*/
shintamainjp	0:ec264f4ce158	256	if (12 <= data.bitcount) {
shintamainjp	0:ec264f4ce158	257	data.state = Received;
shintamainjp	0:ec264f4ce158	258	work.c1 = -1;
shintamainjp	0:ec264f4ce158	259	work.c2 = -1;
shintamainjp	0:ec264f4ce158	260	work.c3 = -1;
shintamainjp	0:ec264f4ce158	261	work.d1 = -1;
shintamainjp	0:ec264f4ce158	262	work.d2 = -1;
shintamainjp	0:ec264f4ce158	263	}
shintamainjp	0:ec264f4ce158	264	#else
shintamainjp	0:ec264f4ce158	265	/*
shintamainjp	0:ec264f4ce158	266	* Set timeout for tail detection automatically.
shintamainjp	0:ec264f4ce158	267	*/
shintamainjp	0:ec264f4ce158	268	timeout.detach();
shintamainjp	0:ec264f4ce158	269	timeout.attach_us(this, &ReceiverIR::isr_timeout, TUS_SONY * 10);
shintamainjp	0:ec264f4ce158	270	#endif
shintamainjp	0:ec264f4ce158	271	}
shintamainjp	0:ec264f4ce158	272	break;
shintamainjp	0:ec264f4ce158	273	case Received:
shintamainjp	0:ec264f4ce158	274	break;
shintamainjp	0:ec264f4ce158	275	default:
shintamainjp	0:ec264f4ce158	276	break;
shintamainjp	0:ec264f4ce158	277	}
shintamainjp	0:ec264f4ce158	278	IRQ_ENABLE();
shintamainjp	0:ec264f4ce158	279	}
shintamainjp	0:ec264f4ce158	280
shintamainjp	0:ec264f4ce158	281	void ReceiverIR::isr_timeout(void) {
shintamainjp	0:ec264f4ce158	282	IRQ_DISABLE();
shintamainjp	0:ec264f4ce158	283	if (data.state == Receiving) {
shintamainjp	0:ec264f4ce158	284	data.state = Received;
shintamainjp	0:ec264f4ce158	285	work.c1 = -1;
shintamainjp	0:ec264f4ce158	286	work.c2 = -1;
shintamainjp	0:ec264f4ce158	287	work.c3 = -1;
shintamainjp	0:ec264f4ce158	288	work.d1 = -1;
shintamainjp	0:ec264f4ce158	289	work.d2 = -1;
shintamainjp	0:ec264f4ce158	290	}
shintamainjp	0:ec264f4ce158	291	IRQ_ENABLE();
shintamainjp	0:ec264f4ce158	292	}

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Type:	Library
Created:	30 Jan 2017
Imports:	1
Forks:	0
Commits:	13
Dependents:	0
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ReceiverIR.cpp@0:ec264f4ce158, 2010-08-17 (annotated)

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