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Shinichiro Nakamura / Mbed 2 deprecated StarBoardOrangeExample2

StarBoard Orange - Example application No.2 (Version 0.0.4)

RemoteIR/ReceiverIR.cpp@1:9370008ac96b, 2010-08-15 (annotated)

Committer:: shintamainjp
Date:: Sun Aug 15 00:27:30 2010 +0000
Revision:: 1:9370008ac96b
Parent:: 0:5d79cd4ac81d
Child:: 2:d4625043c895

Who changed what in which revision?

User	Revision	Line number	New contents of line
shintamainjp	0:5d79cd4ac81d	1	/**
shintamainjp	1:9370008ac96b	2	* IR receiver (Version 0.0.2)
shintamainjp	0:5d79cd4ac81d	3	*
shintamainjp	0:5d79cd4ac81d	4	* Copyright (C) 2010 Shinichiro Nakamura (CuBeatSystems)
shintamainjp	0:5d79cd4ac81d	5	* http://shinta.main.jp/
shintamainjp	0:5d79cd4ac81d	6	*/
shintamainjp	0:5d79cd4ac81d	7
shintamainjp	0:5d79cd4ac81d	8	#include "ReceiverIR.h"
shintamainjp	0:5d79cd4ac81d	9
shintamainjp	0:5d79cd4ac81d	10	#define InRange(x,y) ((((y) * 0.7) < (x)) && ((x) < ((y) * 1.3)))
shintamainjp	0:5d79cd4ac81d	11	#define IRQ_ENABLE() sem.release(); __enable_irq()
shintamainjp	0:5d79cd4ac81d	12	#define IRQ_DISABLE() __disable_irq(); sem.take()
shintamainjp	0:5d79cd4ac81d	13
shintamainjp	0:5d79cd4ac81d	14	ReceiverIR::ReceiverIR(PinName rx) : evt(rx) {
shintamainjp	0:5d79cd4ac81d	15	IRQ_DISABLE();
shintamainjp	0:5d79cd4ac81d	16	evt.fall(this, &ReceiverIR::isr_fall);
shintamainjp	0:5d79cd4ac81d	17	evt.rise(this, &ReceiverIR::isr_rise);
shintamainjp	0:5d79cd4ac81d	18	ticker.attach_us(this, &ReceiverIR::isr_wdt, 1 * 1000);
shintamainjp	0:5d79cd4ac81d	19	init_state();
shintamainjp	0:5d79cd4ac81d	20	IRQ_ENABLE();
shintamainjp	0:5d79cd4ac81d	21	}
shintamainjp	0:5d79cd4ac81d	22
shintamainjp	0:5d79cd4ac81d	23	ReceiverIR::~ReceiverIR() {}
shintamainjp	0:5d79cd4ac81d	24
shintamainjp	0:5d79cd4ac81d	25	ReceiverIR::State ReceiverIR::getState() {
shintamainjp	0:5d79cd4ac81d	26	IRQ_DISABLE();
shintamainjp	0:5d79cd4ac81d	27	State s = data.state;
shintamainjp	0:5d79cd4ac81d	28	IRQ_ENABLE();
shintamainjp	0:5d79cd4ac81d	29	return s;
shintamainjp	0:5d79cd4ac81d	30	}
shintamainjp	0:5d79cd4ac81d	31
shintamainjp	0:5d79cd4ac81d	32	int ReceiverIR::getData(ReceiverIR::Format format, uint8_t buf, int bufsiz) {
shintamainjp	0:5d79cd4ac81d	33	IRQ_DISABLE();
shintamainjp	0:5d79cd4ac81d	34
shintamainjp	0:5d79cd4ac81d	35	const int bc = data.bitcount;
shintamainjp	0:5d79cd4ac81d	36	if (bufsiz < (bc / 8)) {
shintamainjp	0:5d79cd4ac81d	37	IRQ_ENABLE();
shintamainjp	0:5d79cd4ac81d	38	return -1;
shintamainjp	0:5d79cd4ac81d	39	}
shintamainjp	0:5d79cd4ac81d	40
shintamainjp	0:5d79cd4ac81d	41	*format = data.format;
shintamainjp	0:5d79cd4ac81d	42	for (int i = 0; i < (bc / 8); i++) {
shintamainjp	0:5d79cd4ac81d	43	buf[i] = data.buffer[i];
shintamainjp	0:5d79cd4ac81d	44	}
shintamainjp	0:5d79cd4ac81d	45
shintamainjp	0:5d79cd4ac81d	46	init_state();
shintamainjp	0:5d79cd4ac81d	47
shintamainjp	0:5d79cd4ac81d	48	IRQ_ENABLE();
shintamainjp	0:5d79cd4ac81d	49	return bc;
shintamainjp	0:5d79cd4ac81d	50	}
shintamainjp	0:5d79cd4ac81d	51
shintamainjp	0:5d79cd4ac81d	52	void ReceiverIR::init_state(void) {
shintamainjp	0:5d79cd4ac81d	53	work.c1 = -1;
shintamainjp	0:5d79cd4ac81d	54	work.c2 = -1;
shintamainjp	0:5d79cd4ac81d	55	work.c3 = -1;
shintamainjp	0:5d79cd4ac81d	56	work.d1 = -1;
shintamainjp	0:5d79cd4ac81d	57	work.d2 = -1;
shintamainjp	0:5d79cd4ac81d	58	data.state = Idle;
shintamainjp	0:5d79cd4ac81d	59	data.format = UNKNOWN;
shintamainjp	0:5d79cd4ac81d	60	data.bitcount = 0;
shintamainjp	0:5d79cd4ac81d	61	timer.stop();
shintamainjp	0:5d79cd4ac81d	62	timer.reset();
shintamainjp	0:5d79cd4ac81d	63	for (int i = 0; i < sizeof(data.buffer); i++) {
shintamainjp	0:5d79cd4ac81d	64	data.buffer[i] = 0;
shintamainjp	0:5d79cd4ac81d	65	}
shintamainjp	0:5d79cd4ac81d	66	}
shintamainjp	0:5d79cd4ac81d	67
shintamainjp	0:5d79cd4ac81d	68	void ReceiverIR::isr_wdt(void) {
shintamainjp	0:5d79cd4ac81d	69	IRQ_DISABLE();
shintamainjp	0:5d79cd4ac81d	70	static int cnt = 0;
shintamainjp	0:5d79cd4ac81d	71	if ((Receiving == data.state) \|\| ((0 <= work.c1) \|\| (0 <= work.c2) \|\| (0 <= work.c3))) {
shintamainjp	0:5d79cd4ac81d	72	cnt++;
shintamainjp	0:5d79cd4ac81d	73	if (cnt > 500) {
shintamainjp	0:5d79cd4ac81d	74	printf("# WDT [c1=%d, c2=%d, c3=%d, d1=%d, d2=%d, state=%d, format=%d, bitcount=%d]\n",
shintamainjp	0:5d79cd4ac81d	75	work.c1,
shintamainjp	0:5d79cd4ac81d	76	work.c2,
shintamainjp	0:5d79cd4ac81d	77	work.c3,
shintamainjp	0:5d79cd4ac81d	78	work.d1,
shintamainjp	0:5d79cd4ac81d	79	work.d2,
shintamainjp	0:5d79cd4ac81d	80	data.state,
shintamainjp	0:5d79cd4ac81d	81	data.format,
shintamainjp	0:5d79cd4ac81d	82	data.bitcount);
shintamainjp	0:5d79cd4ac81d	83	init_state();
shintamainjp	0:5d79cd4ac81d	84	cnt = 0;
shintamainjp	0:5d79cd4ac81d	85	}
shintamainjp	0:5d79cd4ac81d	86	} else {
shintamainjp	0:5d79cd4ac81d	87	cnt = 0;
shintamainjp	0:5d79cd4ac81d	88	}
shintamainjp	0:5d79cd4ac81d	89	IRQ_ENABLE();
shintamainjp	0:5d79cd4ac81d	90	}
shintamainjp	0:5d79cd4ac81d	91
shintamainjp	0:5d79cd4ac81d	92	void ReceiverIR::isr_fall(void) {
shintamainjp	0:5d79cd4ac81d	93	IRQ_DISABLE();
shintamainjp	0:5d79cd4ac81d	94	switch (data.state) {
shintamainjp	0:5d79cd4ac81d	95	case Idle:
shintamainjp	0:5d79cd4ac81d	96	if (work.c1 < 0) {
shintamainjp	0:5d79cd4ac81d	97	timer.start();
shintamainjp	0:5d79cd4ac81d	98	work.c1 = timer.read_us();
shintamainjp	0:5d79cd4ac81d	99	} else {
shintamainjp	0:5d79cd4ac81d	100	work.c3 = timer.read_us();
shintamainjp	0:5d79cd4ac81d	101	int a = work.c2 - work.c1;
shintamainjp	0:5d79cd4ac81d	102	int b = work.c3 - work.c2;
shintamainjp	0:5d79cd4ac81d	103	if (InRange(a, TUS_NEC * 16) && InRange(b, TUS_NEC * 8)) {
shintamainjp	0:5d79cd4ac81d	104	/*
shintamainjp	0:5d79cd4ac81d	105	* NEC.
shintamainjp	0:5d79cd4ac81d	106	*/
shintamainjp	0:5d79cd4ac81d	107	data.format = NEC;
shintamainjp	0:5d79cd4ac81d	108	data.state = Receiving;
shintamainjp	0:5d79cd4ac81d	109	data.bitcount = 0;
shintamainjp	0:5d79cd4ac81d	110	} else if (InRange(a, TUS_NEC * 16) && InRange(b, TUS_NEC * 4)) {
shintamainjp	0:5d79cd4ac81d	111	/*
shintamainjp	0:5d79cd4ac81d	112	* NEC Repeat.
shintamainjp	0:5d79cd4ac81d	113	*/
shintamainjp	0:5d79cd4ac81d	114	data.format = NEC;
shintamainjp	0:5d79cd4ac81d	115	data.state = Received;
shintamainjp	0:5d79cd4ac81d	116	data.bitcount = 0;
shintamainjp	0:5d79cd4ac81d	117	} else if (InRange(a, TUS_AEHA * 8) && InRange(b, TUS_AEHA * 4)) {
shintamainjp	0:5d79cd4ac81d	118	/*
shintamainjp	0:5d79cd4ac81d	119	* AEHA.
shintamainjp	0:5d79cd4ac81d	120	*/
shintamainjp	0:5d79cd4ac81d	121	data.format = AEHA;
shintamainjp	0:5d79cd4ac81d	122	data.state = Receiving;
shintamainjp	0:5d79cd4ac81d	123	data.bitcount = 0;
shintamainjp	0:5d79cd4ac81d	124	} else if (InRange(a, TUS_AEHA * 8) && InRange(b, TUS_AEHA * 8)) {
shintamainjp	0:5d79cd4ac81d	125	/*
shintamainjp	0:5d79cd4ac81d	126	* AEHA Repeat.
shintamainjp	0:5d79cd4ac81d	127	*/
shintamainjp	0:5d79cd4ac81d	128	data.format = AEHA;
shintamainjp	0:5d79cd4ac81d	129	data.state = Received;
shintamainjp	0:5d79cd4ac81d	130	data.bitcount = 0;
shintamainjp	0:5d79cd4ac81d	131	} else {
shintamainjp	0:5d79cd4ac81d	132	init_state();
shintamainjp	0:5d79cd4ac81d	133	}
shintamainjp	0:5d79cd4ac81d	134	}
shintamainjp	0:5d79cd4ac81d	135	break;
shintamainjp	0:5d79cd4ac81d	136	case Receiving:
shintamainjp	0:5d79cd4ac81d	137	if (NEC == data.format) {
shintamainjp	0:5d79cd4ac81d	138	work.d2 = timer.read_us();
shintamainjp	0:5d79cd4ac81d	139	int a = work.d2 - work.d1;
shintamainjp	0:5d79cd4ac81d	140	if (InRange(a, TUS_NEC * 3)) {
shintamainjp	0:5d79cd4ac81d	141	data.buffer[data.bitcount / 8] \|= (1 << (data.bitcount % 8));
shintamainjp	0:5d79cd4ac81d	142	} else if (InRange(a, TUS_NEC * 1)) {
shintamainjp	0:5d79cd4ac81d	143	data.buffer[data.bitcount / 8] &= ~(1 << (data.bitcount % 8));
shintamainjp	0:5d79cd4ac81d	144	}
shintamainjp	0:5d79cd4ac81d	145	data.bitcount++;
shintamainjp	0:5d79cd4ac81d	146	if (32 <= data.bitcount) {
shintamainjp	0:5d79cd4ac81d	147	data.state = Received;
shintamainjp	0:5d79cd4ac81d	148	}
shintamainjp	0:5d79cd4ac81d	149	} else if (AEHA == data.format) {
shintamainjp	0:5d79cd4ac81d	150	work.d2 = timer.read_us();
shintamainjp	0:5d79cd4ac81d	151	int a = work.d2 - work.d1;
shintamainjp	0:5d79cd4ac81d	152	if (InRange(a, TUS_AEHA * 3)) {
shintamainjp	0:5d79cd4ac81d	153	data.buffer[data.bitcount / 8] \|= (1 << (data.bitcount % 8));
shintamainjp	0:5d79cd4ac81d	154	} else if (InRange(a, TUS_AEHA * 1)) {
shintamainjp	0:5d79cd4ac81d	155	data.buffer[data.bitcount / 8] &= ~(1 << (data.bitcount % 8));
shintamainjp	0:5d79cd4ac81d	156	}
shintamainjp	0:5d79cd4ac81d	157	data.bitcount++;
shintamainjp	0:5d79cd4ac81d	158	/*
shintamainjp	0:5d79cd4ac81d	159	* Typical length of AEHA is 48 bits.
shintamainjp	0:5d79cd4ac81d	160	* Please check a specification of your remote controller if you find a problem.
shintamainjp	1:9370008ac96b	161	*/
shintamainjp	0:5d79cd4ac81d	162	if (48 <= data.bitcount) {
shintamainjp	0:5d79cd4ac81d	163	data.state = Received;
shintamainjp	1:9370008ac96b	164	work.c1 = -1;
shintamainjp	1:9370008ac96b	165	work.c2 = -1;
shintamainjp	1:9370008ac96b	166	work.c3 = -1;
shintamainjp	1:9370008ac96b	167	work.d1 = -1;
shintamainjp	1:9370008ac96b	168	work.d2 = -1;
shintamainjp	0:5d79cd4ac81d	169	}
shintamainjp	0:5d79cd4ac81d	170	} else if (SONY == data.format) {
shintamainjp	0:5d79cd4ac81d	171	work.d1 = timer.read_us();
shintamainjp	0:5d79cd4ac81d	172	}
shintamainjp	0:5d79cd4ac81d	173	break;
shintamainjp	0:5d79cd4ac81d	174	case Received:
shintamainjp	0:5d79cd4ac81d	175	break;
shintamainjp	0:5d79cd4ac81d	176	default:
shintamainjp	0:5d79cd4ac81d	177	break;
shintamainjp	0:5d79cd4ac81d	178	}
shintamainjp	0:5d79cd4ac81d	179	IRQ_ENABLE();
shintamainjp	0:5d79cd4ac81d	180	}
shintamainjp	0:5d79cd4ac81d	181
shintamainjp	0:5d79cd4ac81d	182	void ReceiverIR::isr_rise(void) {
shintamainjp	0:5d79cd4ac81d	183	IRQ_DISABLE();
shintamainjp	0:5d79cd4ac81d	184	switch (data.state) {
shintamainjp	0:5d79cd4ac81d	185	case Idle:
shintamainjp	0:5d79cd4ac81d	186	if (0 <= work.c1) {
shintamainjp	0:5d79cd4ac81d	187	work.c2 = timer.read_us();
shintamainjp	0:5d79cd4ac81d	188	int a = work.c2 - work.c1;
shintamainjp	0:5d79cd4ac81d	189	if (InRange(a, TUS_SONY * 4)) {
shintamainjp	0:5d79cd4ac81d	190	data.format = SONY;
shintamainjp	0:5d79cd4ac81d	191	data.state = Receiving;
shintamainjp	0:5d79cd4ac81d	192	data.bitcount = 0;
shintamainjp	0:5d79cd4ac81d	193	} else {
shintamainjp	0:5d79cd4ac81d	194	static const int MINIMUM_LEADER_WIDTH = 150;
shintamainjp	0:5d79cd4ac81d	195	if (a < MINIMUM_LEADER_WIDTH) {
shintamainjp	0:5d79cd4ac81d	196	init_state();
shintamainjp	0:5d79cd4ac81d	197	}
shintamainjp	0:5d79cd4ac81d	198	}
shintamainjp	0:5d79cd4ac81d	199	} else {
shintamainjp	0:5d79cd4ac81d	200	init_state();
shintamainjp	0:5d79cd4ac81d	201	}
shintamainjp	0:5d79cd4ac81d	202	break;
shintamainjp	0:5d79cd4ac81d	203	case Receiving:
shintamainjp	0:5d79cd4ac81d	204	if (NEC == data.format) {
shintamainjp	0:5d79cd4ac81d	205	work.d1 = timer.read_us();
shintamainjp	0:5d79cd4ac81d	206	} else if (AEHA == data.format) {
shintamainjp	0:5d79cd4ac81d	207	work.d1 = timer.read_us();
shintamainjp	0:5d79cd4ac81d	208	} else if (SONY == data.format) {
shintamainjp	0:5d79cd4ac81d	209	work.d2 = timer.read_us();
shintamainjp	0:5d79cd4ac81d	210	int a = work.d2 - work.d1;
shintamainjp	0:5d79cd4ac81d	211	if (InRange(a, TUS_SONY * 2)) {
shintamainjp	0:5d79cd4ac81d	212	data.buffer[data.bitcount / 8] \|= (1 << (data.bitcount % 8));
shintamainjp	0:5d79cd4ac81d	213	} else if (InRange(a, TUS_SONY * 1)) {
shintamainjp	0:5d79cd4ac81d	214	data.buffer[data.bitcount / 8] &= ~(1 << (data.bitcount % 8));
shintamainjp	0:5d79cd4ac81d	215	}
shintamainjp	0:5d79cd4ac81d	216	data.bitcount++;
shintamainjp	0:5d79cd4ac81d	217	/*
shintamainjp	1:9370008ac96b	218	* How do we get the correct length? (12bits, 15bits, 20bits...)
shintamainjp	0:5d79cd4ac81d	219	* By a model only?
shintamainjp	0:5d79cd4ac81d	220	* Please check a specification of your remote controller if you find a problem.
shintamainjp	0:5d79cd4ac81d	221	*/
shintamainjp	0:5d79cd4ac81d	222	if (12 <= data.bitcount) {
shintamainjp	0:5d79cd4ac81d	223	data.state = Received;
shintamainjp	1:9370008ac96b	224	work.c1 = -1;
shintamainjp	1:9370008ac96b	225	work.c2 = -1;
shintamainjp	1:9370008ac96b	226	work.c3 = -1;
shintamainjp	1:9370008ac96b	227	work.d1 = -1;
shintamainjp	1:9370008ac96b	228	work.d2 = -1;
shintamainjp	0:5d79cd4ac81d	229	}
shintamainjp	0:5d79cd4ac81d	230	}
shintamainjp	0:5d79cd4ac81d	231	break;
shintamainjp	0:5d79cd4ac81d	232	case Received:
shintamainjp	0:5d79cd4ac81d	233	break;
shintamainjp	0:5d79cd4ac81d	234	default:
shintamainjp	0:5d79cd4ac81d	235	break;
shintamainjp	0:5d79cd4ac81d	236	}
shintamainjp	0:5d79cd4ac81d	237	IRQ_ENABLE();
shintamainjp	0:5d79cd4ac81d	238	}

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	13 Aug 2010
Imports:	174
Forks:	0
Commits:	4
Dependents:	0
Dependencies:	3
Followers:	8

RemoteIR/ReceiverIR.cpp@1:9370008ac96b, 2010-08-15 (annotated)

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