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IRremote.cpp
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IRremote.cpp
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//******************************************************************************
// IRremote
// Version 2.0.1 June, 2015
// Copyright 2009 Ken Shirriff
// For details, see http://arcfn.com/2009/08/multi-protocol-infrared-remote-library.html
//
// Modified by Paul Stoffregen <[email protected]> to support other boards and timers
// Modified by Mitra Ardron <[email protected]>
// Added Sanyo and Mitsubishi controllers
// Modified Sony to spot the repeat codes that some Sony's send
//
// Interrupt code based on NECIRrcv by Joe Knapp
// http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1210243556
// Also influenced by http://zovirl.com/2008/11/12/building-a-universal-remote-with-an-arduino/
//
// JVC and Panasonic protocol added by Kristian Lauszus (Thanks to zenwheel and other people at the original blog post)
// LG added by Darryl Smith (based on the JVC protocol)
// Whynter A/C ARC-110WD added by Francesco Meschia
//******************************************************************************
#include <avr/interrupt.h>
// Defining IR_GLOBAL here allows us to declare the instantiation of global variables
#define IR_GLOBAL
# include "IRremote.h"
# include "IRremoteInt.h"
#undef IR_GLOBAL
//+=============================================================================
// The match functions were (apparently) originally MACROs to improve code speed
// (although this would have bloated the code) hence the names being CAPS
// A later release implemented debug output and so they needed to be converted
// to functions.
// I tried to implement a dual-compile mode (DEBUG/non-DEBUG) but for some
// reason, no matter what I did I could not get them to function as macros again.
// I have found a *lot* of bugs in the Arduino compiler over the last few weeks,
// and I am currently assuming that one of these bugs is my problem.
// I may revisit this code at a later date and look at the assembler produced
// in a hope of finding out what is going on, but for now they will remain as
// functions even in non-DEBUG mode
//
int MATCH (int measured, int desired)
{
DBG_PRINT(F("Testing: "));
DBG_PRINT(TICKS_LOW(desired), DEC);
DBG_PRINT(F(" <= "));
DBG_PRINT(measured, DEC);
DBG_PRINT(F(" <= "));
DBG_PRINT(TICKS_HIGH(desired), DEC);
bool passed = ((measured >= TICKS_LOW(desired)) && (measured <= TICKS_HIGH(desired)));
if (passed)
DBG_PRINTLN(F("?; passed"));
else
DBG_PRINTLN(F("?; FAILED"));
return passed;
}
//+========================================================
// Due to sensor lag, when received, Marks tend to be 100us too long
//
int MATCH_MARK (int measured_ticks, int desired_us)
{
DBG_PRINT(F("Testing mark (actual vs desired): "));
DBG_PRINT(measured_ticks * USECPERTICK, DEC);
DBG_PRINT(F("us vs "));
DBG_PRINT(desired_us, DEC);
DBG_PRINT("us");
DBG_PRINT(": ");
DBG_PRINT(TICKS_LOW(desired_us + MARK_EXCESS) * USECPERTICK, DEC);
DBG_PRINT(F(" <= "));
DBG_PRINT(measured_ticks * USECPERTICK, DEC);
DBG_PRINT(F(" <= "));
DBG_PRINT(TICKS_HIGH(desired_us + MARK_EXCESS) * USECPERTICK, DEC);
bool passed = ((measured_ticks >= TICKS_LOW (desired_us + MARK_EXCESS))
&& (measured_ticks <= TICKS_HIGH(desired_us + MARK_EXCESS)));
if (passed)
DBG_PRINTLN(F("?; passed"));
else
DBG_PRINTLN(F("?; FAILED"));
return passed;
}
//+========================================================
// Due to sensor lag, when received, Spaces tend to be 100us too short
//
int MATCH_SPACE (int measured_ticks, int desired_us)
{
DBG_PRINT(F("Testing space (actual vs desired): "));
DBG_PRINT(measured_ticks * USECPERTICK, DEC);
DBG_PRINT(F("us vs "));
DBG_PRINT(desired_us, DEC);
DBG_PRINT("us");
DBG_PRINT(": ");
DBG_PRINT(TICKS_LOW(desired_us - MARK_EXCESS) * USECPERTICK, DEC);
DBG_PRINT(F(" <= "));
DBG_PRINT(measured_ticks * USECPERTICK, DEC);
DBG_PRINT(F(" <= "));
DBG_PRINT(TICKS_HIGH(desired_us - MARK_EXCESS) * USECPERTICK, DEC);
bool passed = ((measured_ticks >= TICKS_LOW (desired_us - MARK_EXCESS))
&& (measured_ticks <= TICKS_HIGH(desired_us - MARK_EXCESS)));
if (passed)
DBG_PRINTLN(F("?; passed"));
else
DBG_PRINTLN(F("?; FAILED"));
return passed;
}
//+=============================================================================
// Interrupt Service Routine - Fires every 50uS
// TIMER2 interrupt code to collect raw data.
// Widths of alternating SPACE, MARK are recorded in rawbuf.
// Recorded in ticks of 50uS [microseconds, 0.000050 seconds]
// 'rawlen' counts the number of entries recorded so far.
// First entry is the SPACE between transmissions.
// As soon as a the first [SPACE] entry gets long:
// Ready is set; State switches to IDLE; Timing of SPACE continues.
// As soon as first MARK arrives:
// Gap width is recorded; Ready is cleared; New logging starts
//
ISR (TIMER_INTR_NAME)
{
TIMER_RESET;
// Read if IR Receiver -> SPACE [xmt LED off] or a MARK [xmt LED on]
// digitalRead() is very slow. Optimisation is possible, but makes the code unportable
uint8_t irdata = (uint8_t)digitalRead(irparams.recvpin);
irparams.timer++; // One more 50uS tick
if (irparams.rawlen >= RAWBUF) irparams.rcvstate = STATE_OVERFLOW ; // Buffer overflow
switch(irparams.rcvstate) {
//......................................................................
case STATE_IDLE: // In the middle of a gap
if (irdata == MARK) {
if (irparams.timer < GAP_TICKS) { // Not big enough to be a gap.
irparams.timer = 0;
} else {
// Gap just ended; Record duration; Start recording transmission
irparams.overflow = false;
irparams.rawlen = 0;
irparams.rawbuf[irparams.rawlen++] = irparams.timer;
irparams.timer = 0;
irparams.rcvstate = STATE_MARK;
}
}
break;
//......................................................................
case STATE_MARK: // Timing Mark
if (irdata == SPACE) { // Mark ended; Record time
irparams.rawbuf[irparams.rawlen++] = irparams.timer;
irparams.timer = 0;
irparams.rcvstate = STATE_SPACE;
}
break;
//......................................................................
case STATE_SPACE: // Timing Space
if (irdata == MARK) { // Space just ended; Record time
irparams.rawbuf[irparams.rawlen++] = irparams.timer;
irparams.timer = 0;
irparams.rcvstate = STATE_MARK;
} else if (irparams.timer > GAP_TICKS) { // Space
// A long Space, indicates gap between codes
// Flag the current code as ready for processing
// Switch to STOP
// Don't reset timer; keep counting Space width
irparams.rcvstate = STATE_STOP;
}
break;
//......................................................................
case STATE_STOP: // Waiting; Measuring Gap
if (irdata == MARK) irparams.timer = 0 ; // Reset gap timer
break;
//......................................................................
case STATE_OVERFLOW: // Flag up a read overflow; Stop the State Machine
irparams.overflow = true;
irparams.rcvstate = STATE_STOP;
break;
}
// If requested, flash LED while receiving IR data
if (irparams.blinkflag) {
if (irdata == MARK)
if (irparams.blinkpin) digitalWrite(irparams.blinkpin, HIGH); // Turn user defined pin LED on
else BLINKLED_ON() ; // if no user defined LED pin, turn default LED pin for the hardware on
else if (irparams.blinkpin) digitalWrite(irparams.blinkpin, LOW); // Turn user defined pin LED on
else BLINKLED_OFF() ; // if no user defined LED pin, turn default LED pin for the hardware on
}
}