mirror of
https://github.com/Show-maket/IR-protocol.git
synced 2025-05-04 07:10:16 +00:00
338 lines
11 KiB
C++
338 lines
11 KiB
C++
#include "IR_Decoder.h"
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#include "IR_Encoder.h"
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#define checkAddr(h, l) (\
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((uint16_t)((dataBuffer[h] << 8) | dataBuffer[l]) == addrSelf) || \
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((uint16_t)((dataBuffer[h] << 8) | dataBuffer[l]) >= IR_Broadcast)\
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)
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IR_Decoder::IR_Decoder(uint16_t addr, IR_Encoder* encPair = nullptr) : addrSelf(addr), encoder(encPair) {
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rawBuffer = new uint8_t[bufferRawSize] { 0 };
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prevRise = prevFall = prevPrevFall = prevPrevRise = 0;
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start_RX();
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}
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IR_Decoder::~IR_Decoder() {
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delete rawBuffer;
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}
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void IR_Decoder::writeToBuffer(bool bit) {
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if (!isBufferOverflow && !isPreamb) {
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if (HIGH_FIRST) {
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rawBuffer[(bufBitPos >> 3)] |= bit << (7 - (bufBitPos & ~(~0 << 3)));
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}/* else {
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rawBuffer[(bufBitPos >> 3)] |= bit << (bufBitPos & ~(~0 << 3));
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} */
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#ifdef IRDEBUG
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bit ? infoPulse(writeOp, 2) : infoPulse(writeOp, 1);
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#endif
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if (isBufferOverflow) { //TODO: Буффер переполнен!
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}
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//const auto testval = bufferBitSizeMax;
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if ((bufBitPos >= (8 * msgBytes) - syncBits) && !isMsgAvaliable) {
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switch ((rawBuffer[0] >> 5) & IR_MASK_MSG_TYPE) {
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case IR_MSG_ACCEPT:
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if (bufBitPos >= ((msgBytes + addrBytes + crcBytes) * (8 + 3)) - syncBits) {
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const uint8_t dataSize = msgBytes + addrBytes;
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isRawAvaliable = true;
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isMsgAvaliable = crcCheck(dataSize);
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if (isMsgAvaliable && checkAddr(1, 2)) {
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gotAccept._set(dataBuffer, msgBytes + addrBytes + crcBytes, crcValue, errorCounter);
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gotAccept._isAvaliable = true;
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}
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}
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break;
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case IR_MSG_REQUEST:
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if (bufBitPos >= ((msgBytes + addrBytes + addrBytes + crcBytes) * (8 + 3)) - syncBits) {
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const uint8_t dataSize = msgBytes + addrBytes + addrBytes;
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isRawAvaliable = true;
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isMsgAvaliable = (crcCheck(dataSize));
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if (isMsgAvaliable && checkAddr(3, 4)) {
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gotRequest._isAvaliable = true;
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gotRequest._set(dataBuffer, msgBytes + addrBytes + addrBytes + crcBytes, crcValue, errorCounter);
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}
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}
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break;
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case IR_MSG_DATA_ACCEPT:
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case IR_MSG_DATA_NOACCEPT:
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if (bufBitPos >= ((bitPerByte + syncBits) * ((rawBuffer[0] & IR_MASK_MSG_INFO) + crcBytes)) - syncBits) {
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const uint8_t dataSize = (rawBuffer[0] & IR_MASK_MSG_INFO);
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isRawAvaliable = true;
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isMsgAvaliable = crcCheck(dataSize);
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if (isMsgAvaliable && checkAddr(3, 4)
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) {
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gotData._isAvaliable = true;
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gotData._set(dataBuffer, (dataSize)+crcBytes, crcValue, errorCounter);
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}
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}
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break;
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default:
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break;
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}
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}
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if (bufBitPos >= bufferRawSize * 8 - 1) { isBufferOverflow = true; }
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bufBitPos++;
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}
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}
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uint8_t* IR_Decoder::getDataBuffer(bool reset = false) {
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if (!isRawAvaliable) { return nullptr; }
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if (dataBuffer != nullptr) { delete dataBuffer; dataBuffer = nullptr; } // устранение утечки памяти
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dataBuffer = new uint8_t[dataByteSizeMax] { 0 }; // Буффер по максимуму
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bool isData = true;
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bool controlCheckFirst = true;
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bool controlCheck;
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uint8_t nextControlBit = bitPerByte;
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uint16_t i_dataBuffer = 0;
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for (uint16_t i = 0; i < dataBitSize; i++) {
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if (i == nextControlBit) {
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controlCheckFirst = true;
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nextControlBit += (isData ? syncBits : bitPerByte);
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isData = !isData;
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}
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if (isData) {
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dataBuffer[i_dataBuffer / 8] |= (rawBuffer[(i / 8)] >> (7 - (i % 8)) & 1) << 7 - (i_dataBuffer % 8);
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i_dataBuffer++;
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} else { // Проверка контрольных sync битов
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if (controlCheckFirst) {
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controlCheck = (rawBuffer[(i / 8)] >> (7 - (i % 8)) & 1);
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controlCheckFirst = false;
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} else {
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controlCheck |= (rawBuffer[(i / 8)] >> (7 - (i % 8)) & 1);
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}
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}
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}
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isFilterBufferAvaliable = controlCheck;
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if (reset) { resetAvaliable(); }
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return dataBuffer;
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}
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bool IR_Decoder::crcCheck(uint8_t len) {
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bool crcOK = false;
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// получить буффер, если нет
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if (!isFilterBufferAvaliable) getDataBuffer();
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if (dataBuffer == nullptr) {
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return false;
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}
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crcValue = 0;
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crcValue = (crc8(dataBuffer, 0, len, poly1) << 8) & ~((crc_t)0xFF);
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crcValue |= crc8(dataBuffer, 0, len + 1, poly2) & (crc_t)0xFF;
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if (
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crcValue &&
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dataBuffer[len] == (crcValue >> 8) & 0xFF &&
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dataBuffer[len + 1] == (crcValue & 0xFF)
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) {
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crcOK = true;
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} else { crcOK = false; }
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return crcOK;
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}
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void IR_Decoder::start_RX() {
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resetAvaliable();
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isBufferOverflow = false;
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memset(rawBuffer, 0x00, bufferRawSize);
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bufBitPos = 0;
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}
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void IR_Decoder::resetAvaliable() {
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isRawAvaliable = false;
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isMsgAvaliable = false;
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isFilterBufferAvaliable = false;
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}
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uint16_t IR_Decoder::ceil_div(uint16_t val, uint16_t divider) {
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int ret = val / divider;
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if ((val << 4) / divider - (ret << 4) >= 8)
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ret++;
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return ret;
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}
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void IR_Decoder::isr() { // в прерывании вызываем isr()
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if (isPairSending) return;
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if (micros() - prevRise > IR_timeout) { // первый
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isPreamb = true;
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frontCounter = preambFronts - 1U;
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errorCounter = 0;
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riseSyncTime = bitTime;
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start_RX();
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}
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if (frontCounter > 0) { // в преамбуле
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uint32_t risePeriod = micros() - prevRise;
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if ((PIND >> 2) & 1 && risePeriod < IR_timeout) { // __/``` ↑ и мы в внутри пакета
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if (freeFrec) { riseSyncTime = (riseSyncTime + risePeriod / 2) / 2; } // tuner
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if (risePeriod < riseTimeMin << 1) { // fix рваной единицы
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frontCounter += 2;
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errorCounter++;
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}
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} else { riseSyncTime = bitTime; } // сброс тюнера
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frontCounter--;
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} else {
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if (isPreamb) {// первый фронт после
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}
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isPreamb = false;
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}
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// определить направление фронта
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if ((PIND >> 2) & 1) { // Если __/``` ↑
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uint16_t risePeriod = micros() - prevRise;
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uint16_t highTime = micros() - prevFall;
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uint16_t lowTime = prevFall - prevRise;
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int8_t highCount = 0;
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int8_t lowCount = 0;
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int8_t allCount = 0;
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if (risePeriod < IR_timeout && !isBufferOverflow && risePeriod > riseTimeMin) {
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// Мы в пределах таймаута и буффер не переполнен и fix дроблёных единиц
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if (aroundRise(risePeriod)) { // тактирование есть, сигнал хороший - без ошибок(?)
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if (highTime > riseTimeMin >> 1) { // 1
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#ifdef IRDEBUG
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digitalWrite(wrHigh, 1);
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#endif
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writeToBuffer(HIGH);
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} else { // 0
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#ifdef IRDEBUG
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digitalWrite(wrLow, 1);
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#endif
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writeToBuffer(LOW);
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}
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} else { // пропущены такты! сигнал средний // ошибка пропуска
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highCount = ceil_div(highTime, riseTime); // предполагаемое колличество HIGH битов
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lowCount = ceil_div(lowTime, riseTime); // предполагаемое колличество LOW битов
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allCount = ceil_div(risePeriod, riseTime); // предполагаемое колличество всего битов
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if (highCount == 0 && highTime > riseTime / 3) { // fix короткой единицы (?)после пропуска нулей(?)
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highCount++;
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errorCounter++;
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#ifdef IRDEBUG
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errPulse(errOut, 2);
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#endif
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}
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if (lowCount + highCount > allCount) { // fix ошибочных сдвигов
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if (lowCount > highCount) { // Лишние нули
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lowCount = allCount - highCount;
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#ifdef IRDEBUG
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errPulse(errOut, 3);
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#endif
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} else if (lowCount < highCount) { // Лишние единицы
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highCount = allCount - lowCount;
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#ifdef IRDEBUG
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errPulse(errOut, 4);
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#endif
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} else if (lowCount == highCount) {} // неизвестный случай
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errorCounter += allCount;
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}
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errorCounter += allCount;
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#ifdef IRDEBUG
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errPulse(errOut, 1);
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#endif
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for (int8_t i = 0; i < lowCount && 8 - i; i++) { // отправка LOW битов, если есть
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#ifdef IRDEBUG
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digitalWrite(wrLow, 1);
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#endif
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writeToBuffer(LOW);
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}
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for (int8_t i = 0; i < highCount && 8 - i; i++) { // отправка HIGH битов, если есть
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#ifdef IRDEBUG
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digitalWrite(wrHigh, 1);
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#endif
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writeToBuffer(HIGH);
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}
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}
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#ifdef IRDEBUG
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digitalWrite(wrHigh, 0);
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digitalWrite(wrLow, 0);
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#endif
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}
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if (risePeriod > riseTimeMax >> 1 || highCount || lowCount) { // комплексный фикс рваной единицы
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prevPrevRise = prevRise;
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prevRise = micros();
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} else {
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errorCounter++;
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#ifdef IRDEBUG
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errPulse(errOut, 5);
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#endif
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}
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} else { // Если ```\__ ↓
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if (micros() - prevFall > riseTimeMin) {
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prevPrevFall = prevFall;
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prevFall = micros();
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} else {
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#ifdef IRDEBUG
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//errPulse(errOut, 5);
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#endif
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}
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}
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if (isPreamb && frontCounter <= 0) {
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prevRise = micros() + riseTime;
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}
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#ifdef IRDEBUG
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digitalWrite(writeOp, isPreamb);
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#endif
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}
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// IRDEBUG FUNC
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#ifdef IRDEBUG
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inline void IR_Decoder::errPulse(uint8_t pin, uint8_t count) {
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for (size_t i = 0; i < count; i++) {
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digitalWrite(pin, 1);
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digitalWrite(pin, 0);
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}
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digitalWrite(pin, 0);
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}
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inline void IR_Decoder::infoPulse(uint8_t pin, uint8_t count) {
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for (size_t i = 0; i < count; i++) {
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digitalWrite(pin, 1);
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digitalWrite(pin, 0);
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}
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}
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#endif
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