OMOTE/Platformio/hardware/ESP32/infrared_receiver_hal_esp32.cpp

/*
  Mainly based on IRrecvDumpV2 from IRremoteESP8266
  Slightly changed to run with OMOTE hardware.
*/

/*
 * IRremoteESP8266: IRrecvDumpV2 - dump details of IR codes with IRrecv
 * An IR detector/demodulator must be connected to the input kRecvPin.
 *
 * Copyright 2009 Ken Shirriff, http://arcfn.com
 * Copyright 2017-2019 David Conran
 *
 * Example circuit diagram:
 *  https://github.com/crankyoldgit/IRremoteESP8266/wiki#ir-receiving
 *
 * Changes:
 *   Version 1.2 October, 2020
 *     - Enable easy setting of the decoding tolerance value.
 *   Version 1.0 October, 2019
 *     - Internationalisation (i18n) support.
 *     - Stop displaying the legacy raw timing info.
 *   Version 0.5 June, 2019
 *     - Move A/C description to IRac.cpp.
 *   Version 0.4 July, 2018
 *     - Minor improvements and more A/C unit support.
 *   Version 0.3 November, 2017
 *     - Support for A/C decoding for some protocols.
 *   Version 0.2 April, 2017
 *     - Decode from a copy of the data so we can start capturing faster thus
 *       reduce the likelihood of miscaptures.
 * Based on Ken Shirriff's IrsendDemo Version 0.1 July, 2009,
 */

//#include <Arduino.h>
#include <assert.h>
#include <IRrecv.h>
#include <IRremoteESP8266.h>
#include <IRac.h>
#include <IRtext.h>
#include <IRutils.h>

#include "infrared_receiver_hal_esp32.h"

uint8_t IR_RX_GPIO  = 15; // IR receiver input
uint8_t IR_VCC_GPIO = 25; // IR receiver power

bool irReceiverEnabled = false;

tAnnounceNewIRmessage_cb thisAnnounceNewIRmessage_cb = NULL;
void set_announceNewIRmessage_cb_HAL(tAnnounceNewIRmessage_cb pAnnounceNewIRmessage_cb) {
  thisAnnounceNewIRmessage_cb = pAnnounceNewIRmessage_cb;  
}

// The Serial connection baud rate.
// i.e. Status message will be sent to the PC at this baud rate.
// Try to avoid slow speeds like 9600, as you will miss messages and
// cause other problems. 115200 (or faster) is recommended.
// NOTE: Make sure you set your Serial Monitor to the same speed.
const uint32_t kBaudRate = 115200;

// As this program is a special purpose capture/decoder, let us use a larger
// than normal buffer so we can handle Air Conditioner remote codes.
const uint16_t kCaptureBufferSize = 1024;

// kTimeout is the Nr. of milli-Seconds of no-more-data before we consider a
// message ended.
// This parameter is an interesting trade-off. The longer the timeout, the more
// complex a message it can capture. e.g. Some device protocols will send
// multiple message packets in quick succession, like Air Conditioner remotes.
// Air Coniditioner protocols often have a considerable gap (20-40+ms) between
// packets.
// The downside of a large timeout value is a lot of less complex protocols
// send multiple messages when the remote's button is held down. The gap between
// them is often also around 20+ms. This can result in the raw data be 2-3+
// times larger than needed as it has captured 2-3+ messages in a single
// capture. Setting a low timeout value can resolve this.
// So, choosing the best kTimeout value for your use particular case is
// quite nuanced. Good luck and happy hunting.
// NOTE: Don't exceed kMaxTimeoutMs. Typically 130ms.
#if DECODE_AC
// Some A/C units have gaps in their protocols of ~40ms. e.g. Kelvinator
// A value this large may swallow repeats of some protocols
const uint8_t kTimeout = 50;
#else   // DECODE_AC
// Suits most messages, while not swallowing many repeats.
const uint8_t kTimeout = 15;
#endif  // DECODE_AC
// Alternatives:
// const uint8_t kTimeout = 90;
// Suits messages with big gaps like XMP-1 & some aircon units, but can
// accidentally swallow repeated messages in the rawData[] output.
//
// const uint8_t kTimeout = kMaxTimeoutMs;
// This will set it to our currently allowed maximum.
// Values this high are problematic because it is roughly the typical boundary
// where most messages repeat.
// e.g. It will stop decoding a message and start sending it to serial at
//      precisely the time when the next message is likely to be transmitted,
//      and may miss it.

// Set the smallest sized "UNKNOWN" message packets we actually care about.
// This value helps reduce the false-positive detection rate of IR background
// noise as real messages. The chances of background IR noise getting detected
// as a message increases with the length of the kTimeout value. (See above)
// The downside of setting this message too large is you can miss some valid
// short messages for protocols that this library doesn't yet decode.
//
// Set higher if you get lots of random short UNKNOWN messages when nothing
// should be sending a message.
// Set lower if you are sure your setup is working, but it doesn't see messages
// from your device. (e.g. Other IR remotes work.)
// NOTE: Set this value very high to effectively turn off UNKNOWN detection.
const uint16_t kMinUnknownSize = 12;

// How much percentage lee way do we give to incoming signals in order to match
// it?
// e.g. +/- 25% (default) to an expected value of 500 would mean matching a
//      value between 375 & 625 inclusive.
// Note: Default is 25(%). Going to a value >= 50(%) will cause some protocols
//       to no longer match correctly. In normal situations you probably do not
//       need to adjust this value. Typically that's when the library detects
//       your remote's message some of the time, but not all of the time.
const uint8_t kTolerancePercentage = kTolerance;  // kTolerance is normally 25%

// Legacy (No longer supported!)
//
// Change to `true` if you miss/need the old "Raw Timing[]" display.
#define LEGACY_TIMING_INFO false
// ==================== end of TUNEABLE PARAMETERS ====================

// Use turn on the save buffer feature for more complete capture coverage.
IRrecv irrecv(IR_RX_GPIO, kCaptureBufferSize, kTimeout, true);
decode_results results;  // Somewhere to store the results

// This section of code runs only once at start-up.
void start_infraredReceiver_HAL() {
  pinMode(IR_RX_GPIO, INPUT);
  pinMode(IR_VCC_GPIO, OUTPUT);
  digitalWrite(IR_VCC_GPIO, HIGH); // Turn on IR receiver

  // Perform a low level sanity checks that the compiler performs bit field
  // packing as we expect and Endianness is as we expect.
  assert(irutils::lowLevelSanityCheck() == 0);

  Serial.printf("\n" D_STR_IRRECVDUMP_STARTUP "\n", IR_RX_GPIO);
#if DECODE_HASH
  // Ignore messages with less than minimum on or off pulses.
  irrecv.setUnknownThreshold(kMinUnknownSize);
#endif  // DECODE_HASH
  irrecv.setTolerance(kTolerancePercentage);  // Override the default tolerance.
  irrecv.enableIRIn();  // Start the receiver
}

void shutdown_infraredReceiver_HAL() {
  irrecv.disableIRIn();
  digitalWrite(IR_VCC_GPIO, LOW); // IR Receiver off
}

// The repeating section of the code
void infraredReceiver_loop_HAL() {
  // Check if the IR code has been received.
  if (irrecv.decode(&results)) {
    // Display a crude timestamp.
    uint32_t now = millis();
    Serial.printf(D_STR_TIMESTAMP " : %06u.%03u\n", now / 1000, now % 1000);
    // Check if we got an IR message that was to big for our capture buffer.
    if (results.overflow)
      Serial.printf(D_WARN_BUFFERFULL "\n", kCaptureBufferSize);
    // Display the library version the message was captured with.
    Serial.println(D_STR_LIBRARY "   : v" _IRREMOTEESP8266_VERSION_STR "\n");
    // Display the tolerance percentage if it has been change from the default.
    if (kTolerancePercentage != kTolerance)
      Serial.printf(D_STR_TOLERANCE " : %d%%\n", kTolerancePercentage);
    // Display the basic output of what we found.
    Serial.print(resultToHumanReadableBasic(&results));
    // Display any extra A/C info if we have it.
    String description = IRAcUtils::resultAcToString(&results);
    if (description.length()) Serial.println(D_STR_MESGDESC ": " + description);
    yield();  // Feed the WDT as the text output can take a while to print.
#if LEGACY_TIMING_INFO
    // Output legacy RAW timing info of the result.
    Serial.println(resultToTimingInfo(&results));
    yield();  // Feed the WDT (again)
#endif  // LEGACY_TIMING_INFO
    // Output the results as source code
    Serial.println(resultToSourceCode(&results));
    Serial.println();    // Blank line between entries

    String message = "";
    message += typeToString((&results)->decode_type, (&results)->repeat);
    message += " ";
    message += resultToHexidecimal(&results);
    if (thisAnnounceNewIRmessage_cb != NULL) {
      thisAnnounceNewIRmessage_cb(std::string(message.c_str()));
    }

    yield();             // Feed the WDT (again)

    // if message repeats infinitely, you can try one of these two workarounds. Don't know why this is needed.
    // irrecv.resume();
    // another workaround could be:
    // irrecv.disableIRIn();
    // irrecv.enableIRIn();

  }
}

bool get_irReceiverEnabled_HAL() {
  return irReceiverEnabled;
}
void set_irReceiverEnabled_HAL(bool aIrReceiverEnabled) {
  irReceiverEnabled = aIrReceiverEnabled;
}