diff --git a/sdrbase/util/aprs.cpp b/sdrbase/util/aprs.cpp index 44d876501..89762b01c 100644 --- a/sdrbase/util/aprs.cpp +++ b/sdrbase/util/aprs.cpp @@ -16,16 +16,26 @@ /////////////////////////////////////////////////////////////////////////////////// #include +#include #include #include #include "aprs.h" +#include "util/units.h" inline bool inRange(unsigned low, unsigned high, unsigned x) { return (low <= x && x <= high); } +// Required for Mic-E Decoding +inline int charToIntAscii(QString&s, int idx) +{ + char c = s.toLatin1().at(idx); + return int(c); +} + + // See: http://www.aprs.org/doc/APRS101.PDF // Currently we only decode what we want to display on the map @@ -35,9 +45,9 @@ bool APRSPacket::decode(AX25Packet packet) if ((packet.m_type == "UI") && (packet.m_pid == "f0") && (packet.m_dataASCII.length() >= 1)) { // Check destination address - QRegExp re("^(AIR.*|ALL.*|AP.*|BEACON|CQ.*|GPS.*|DF.*|DGPS.*|DRILL.*|DX.*|ID.*|JAVA.*|MAIL.*|MICE.*|QST.*|QTH.*|RTCM.*|SKY.*|SPACE.*|SPC.*|SYM.*|TEL.*|TEST.*|TLM.*|WX.*|ZIP.*)"); - QRegExp re_mice("^[A-LP-Z0-9]{3}[L-Z0-9]{3}.?$"); // Mic-E Encoded Destination, 6-7 bytes - if (re.exactMatch(packet.m_to) || re_mice.exactMatch(packet.m_to)) + QRegularExpression re("^(AIR.*|ALL.*|AP.*|BEACON|CQ.*|GPS.*|DF.*|DGPS.*|DRILL.*|DX.*|ID.*|JAVA.*|MAIL.*|MICE.*|QST.*|QTH.*|RTCM.*|SKY.*|SPACE.*|SPC.*|SYM.*|TEL.*|TEST.*|TLM.*|WX.*|ZIP.*)"); + QRegularExpression re_mice("^[A-LP-Z0-9]{3}[L-Z0-9]{3}.?$"); // Mic-E Encoded Destination, 6-7 bytes + if (re.match(packet.m_to).hasMatch() || re_mice.match(packet.m_to).hasMatch()) { m_from = packet.m_from; m_to = packet.m_to; @@ -1004,17 +1014,21 @@ bool APRSPacket::parseTelemetry(QString& info, int& idx) return false; } +// Mic-E Implementation by Peter Beckman KM4BBB github:ooglek bool APRSPacket::parseMicE(QString& info, int& idx, QString& dest) { + info = info.toLatin1(); // Mic-E Location data is encoded in the AX.25 Destination Address - if (dest.length() < 6) + if (dest.length() < 6) { qDebug() << "APRSPacket::parseMicE: Destination invalid length " << dest; return false; + } // Mic-E Information data is 8 bytes minimum, 13-14 with altitude - if (info.length() < idx+8) + if (info.length() < idx+8) { qDebug() << "APRSPacket::parseMicE: Information Data invalid length " << info; return false; + } QString latDigits = ""; QString messageBits = ""; @@ -1023,18 +1037,29 @@ bool APRSPacket::parseMicE(QString& info, int& idx, QString& dest) float latitudeDirection = -1; // Assume South because North is easier to code float longitudeDirection = 1; - QRegExp re("^[A-LP-Z0-9]{3}[L-Z0-9]{3}.?$"); // 6-7 bytes - if (re.exactMatch(dest)) { + QHash messageTypeLookup; + messageTypeLookup["111"] = "Off Duty"; + messageTypeLookup["110"] = "En Route"; + messageTypeLookup["101"] = "In Service"; + messageTypeLookup["100"] = "Returning"; + messageTypeLookup["011"] = "Committed"; + messageTypeLookup["010"] = "Special"; + messageTypeLookup["001"] = "Priority"; + messageTypeLookup["000"] = "Emergency"; + + QRegularExpression re("^[A-LP-Z0-9]{3}[L-Z0-9]{3}.?$"); // 6-7 bytes + if (re.match(dest).hasMatch()) { + m_comment = "Mic-E"; for (int i = 0; i < 6; i++) { - int charInt = charToInt(dest, i); + int charInt = charToIntAscii(dest, i); if (inRange(48, 57, charInt)) { - latDigits.append(static_cast(charToInt(dest, i) % 48)); + latDigits.append(QString::number(charInt % 48)); } else if (inRange(65, 74, charInt)) { - latDigits.append(static_cast(charToInt(dest, i) % 65)); + latDigits.append(QString::number(charInt % 65)); } else if (inRange(80, 89, charInt)) { - latDigits.append(static_cast(charToInt(dest, i) % 80)); + latDigits.append(QString::number(charInt % 80)); } else { - latDigits.append(' '); + latDigits.append('0'); } // Message Type is encoded in 3 bits @@ -1069,9 +1094,15 @@ bool APRSPacket::parseMicE(QString& info, int& idx, QString& dest) } } + if (messageTypeLookup.find(messageBits) != messageTypeLookup.end()) { + m_status = messageTypeLookup[messageBits]; + if (messageType == 1) { + m_status.append(" (custom)"); + } + m_hasStatus = true; + } m_latitude = (latDigits.mid(0, 2).toFloat() + latDigits.mid(2, 2).toFloat()/60.00 + latDigits.mid(4, 2).toFloat()/60.0/100.0) * latitudeDirection; m_hasPosition = true; - } else { qDebug() << "APRSPacket::parseMicE: Destination invalid regexp match " << dest; return false; @@ -1084,54 +1115,93 @@ bool APRSPacket::parseMicE(QString& info, int& idx, QString& dest) // 3: Speed, units of 10 // 4: Speed, units of 1, Course, Units of 100 // 5: Course, 0-99 degrees - // 6: Symbol Code - // 7: Symbol Table ID, / = standard, \ = alternate - if (inRange(38, 127, charToInt(info, idx)) - && inRange(38, 97, charToInt(info, idx+1)) - && inRange(28, 127, charToInt(info, idx+2)) - && inRange(48, 127, charToInt(info, idx+3)) - && inRange(28, 125, charToInt(info, idx+4)) - && inRange(28, 127, charToInt(info, idx+5)) - && inRange(33, 126, charToInt(info, idx+6)) - && (charToInt(info, idx+7) == 47 || charToInt(info, idx+7) == 92) + if (inRange(38, 127, charToIntAscii(info, idx)) + && inRange(38, 97, charToIntAscii(info, idx+1)) + && inRange(28, 127, charToIntAscii(info, idx+2)) + && inRange(48, 127, charToIntAscii(info, idx+3)) + && inRange(28, 125, charToIntAscii(info, idx+4)) + && inRange(28, 127, charToIntAscii(info, idx+5)) ) { // Longitude, plus offset encoded in the AX.25 Destination - int deg = (charToInt(info, idx) - 28) + longitudeOffset; - // Destination Byte 5, ASCII P through Z is offset of +100 + // Destination Byte 5, ASCII P through Z indicates an offset of +100 + int deg = (charToIntAscii(info, idx) - 28) + longitudeOffset; if (inRange(180, 189, deg)) deg -= 80; if (inRange(190, 199, deg)) deg -= 190; - // Crap. You need the Longitude Offset from the Destination Address. - // How do I get that here??? - - int min = (charToInt(info, idx+1) - 28) % 60; - int hundreths = charToInt(info, idx+2); + int min = (charToIntAscii(info, idx+1) - 28) % 60; + int hundreths = charToIntAscii(info, idx+2); // Course and Speed - int speed = ((charToInt(info, idx+3) - 28) * 10) % 800; // Speed in 10 kts units - float decoded_speed_course = (float)(charToInt(info, idx+4) - 28) / 10.0; + int speed = ((charToIntAscii(info, idx+3) - 28) * 10) % 800; // Speed in 10 kts units + float decoded_speed_course = (float)(charToIntAscii(info, idx+4) - 28) / 10.0; speed += floor(decoded_speed_course); // Speed in 1 kt units, added to above - int course = (((charToInt(info, idx+4) - 28) % 10) * 100) % 400; - course += charToInt(info, idx+5) - 28; + int course = (((charToIntAscii(info, idx+4) - 28) % 10) * 100) % 400; + course += charToIntAscii(info, idx+5) - 28; m_longitude = (((float)deg) + min/60.00 + hundreths/60.0/100.0) * longitudeDirection; m_hasPosition = true; - m_symbolTable = info[idx+7].toLatin1(); - m_symbolCode = info[idx+6].toLatin1(); - m_hasSymbol = true; + m_course = course; + m_speed = speed; + m_hasCourseAndSpeed = true; } else { qDebug() << "APRSPacket::parseMicE: Information Data invalid ASCII range " << info; return false; } - // Altitude - // #TODO + // 6: Symbol Code + // 7: Symbol Table ID, / = standard, \ = alternate, "," = Telemetry + if (inRange(33, 126, charToIntAscii(info, idx+6)) + && (charToIntAscii(info, idx+7) == 47 || charToIntAscii(info, idx+7) == 92) + ) + { + m_symbolTable = info[idx+7].toLatin1(); + m_symbolCode = info[idx+6].toLatin1(); + m_hasSymbol = true; + } - qDebug() << "APRSPacket::parseMicE: Successfully Decoded Maybe"; + // Altitude, encoded in Status Message + float altitude = -10000; + QRegularExpression re_mice_altitude("[\]>]?(.{3})}"); // 4-5 bytes, we only need the 3 to get altitude, e.g. "4T} + QRegularExpressionMatch altitude_str = re_mice_altitude.match(info); + if (altitude_str.hasMatch()) { + QHash micEAltitudeMultipliers; + micEAltitudeMultipliers[0] = 91 * 91; + micEAltitudeMultipliers[1] = 91; + micEAltitudeMultipliers[2] = 1; + + for (int i = 0; i < 3; i++) { + QString altmatch = altitude_str.captured(1); + int charInt = charToIntAscii(altmatch, i); + if (!inRange(33, 127, charInt)) { + qDebug() << "APRSPacket::parseMicE: Invalid Altitude Byte Found pos:" << QString::number(i) << " ascii int:" << QString::number(charInt); + break; + } + altitude += micEAltitudeMultipliers[i] * (float)(charInt - 33); + } + + if (altitude >= 0) { + m_altitudeFt = std::round(Units::metresToFeet(altitude)); + m_hasAltitude = true; + } + } + + // Mic-E Text Format + if (info.length() >= 9) { + QString mice_status = info.mid(9); + if (altitude_str.hasMatch() && mice_status.indexOf(altitude_str.captured(0)) != -1) { + mice_status.replace(altitude_str.captured(0), ""); + } + + m_comment += " " + mice_status; + // TODO Implement the APRS 1.2 Mic-E Text Format http://www.aprs.org/aprs12/mic-e-types.txt + // Consider the Kenwood leading characters + } + + // TODO Implement Mic-E Telemetry Data -- need to modify regexp for the Symbol Table Identifier to include comma (,) return true; }