#ifndef __OGN1_H__ #define __OGN1_H__ #include #include #include #include "ognconv.h" #include "intmath.h" #include "bitcount.h" #include "nmea.h" #include "mavlink.h" #include "format.h" // the packet description here is how it look on the little-endian CPU before sending it to the RF chip // nRF905, CC1101, SPIRIT1, RFM69 chips actually reverse the bit order within every byte // thus on the air the bits appear MSbit first for every byte transmitted class OGN1_Packet // Packet structure for the OGN tracker { public: static const int Words = 5; static const int Bytes = 20; union { uint32_t HeaderWord; // ECRR PMTT AAAA AAAA AAAA AAAA AAAA AAAA // E=Emergency, C=enCrypt/Custom, RR=Relay count, P=Parity, M=isMeteo/Other, TT=address Type, AA..=Address:24-bit // When enCrypt/Custom is set the data (position or whatever) can only be decoded by the owner // This option is indented to pass any type of custom data not foreseen otheriwse struct { unsigned int Address :24; // aircraft address unsigned int AddrType : 2; // address type: 0 = random, 1 = ICAO, 2 = FLARM, 3 = OGN unsigned int NonPos : 1; // 0 = position packet, 1 = other information like status unsigned int Parity : 1; // parity takes into account bits 0..27 thus only the 28 lowest bits unsigned int Relay : 2; // 0 = direct packet, 1 = relayed once, 2 = relayed twice, ... unsigned int Encrypted : 1; // packet is encrypted unsigned int Emergency : 1; // aircraft in emergency (not used for now) } Header ; } ; union { uint32_t Data[4]; // 0: QQTT TTTT LLLL LLLL LLLL LLLL LLLL LLLL QQ=fix Quality:2, TTTTTT=time:6, LL..=Latitude:20 // 1: MBDD DDDD LLLL LLLL LLLL LLLL LLLL LLLL F=fixMode:1 B=isBaro:1, DDDDDD=DOP:6, LL..=Longitude:20 // 2: RRRR RRRR SSSS SSSS SSAA AAAA AAAA AAAA RR..=turn Rate:8, SS..=Speed:10, AA..=Alt:14 // 3: BBBB BBBB YYYY PCCC CCCC CCDD DDDD DDDD BB..=Baro altitude:8, YYYY=AcftType:4, P=Stealth:1, CC..=Climb:9, DD..=Heading:10 // meteo/telemetry types: Meteo conditions, Thermal wind/climb, Device status, Precise time, // meteo report: Humidity, Barometric pressure, Temperature, wind Speed/Direction // 2: HHHH HHHH SSSS SSSS SSAA AAAA AAAA AAAA // 3: TTTT TTTT YYYY BBBB BBBB BBDD DDDD DDDD YYYY = report tYpe (meteo, thermal, water level, other telemetry) // Device status: Time, baro pressure+temperature, GPS altitude, supply voltage, TX power, RF noise, software version, software features, hardware features, // 0: UUUU UUUU UUUU UUUU UUUU UUUU UUUU UUUU UU..=Unix time // 1: SSSS SSSS SSSS SSSS TTTT TTTT HHHH HHHH SS..=slot time, TT..=temperature, HH..=humidity // 2: BBBB BBBB BBBB BBBB BBAA AAAA AAAA AAAA Baro pressure[0.5Pa], GPS altitude // 3: VVVV VVVV YYYY HHHH HHHH XXXX VVVV VVVV VV..=firmware version, YYYY = report type, TT..=Temperatature, XX..=TxPower, VV..=battery voltage // Pilot status: // 0: NNNN NNNN NNNN NNNN NNNN NNNN NNNN NNNN Name: 9 char x 7bit or 10 x 6bit or Huffman encoding ? // 1: NNNN NNNN NNNN NNNN NNNN NNNN NNNN NNNN struct { signed int Latitude:24; // // QQTT TTTT LLLL LLLL LLLL LLLL LLLL LLLL QQ=fix Quality:2, TTTTTT=time:6, LL..=Latitude:24 unsigned int Time: 6; // [sec] // time, just second thus ambiguity every every minute unsigned int FixQuality: 2; // // 0 = none, 1 = GPS, 2 = Differential GPS (can be WAAS) signed int Longitude:24; // // MBDD DDDD LLLL LLLL LLLL LLLL LLLL LLLL F=fixMode:1 B=isBaro:1, DDDDDD=DOP:6, LL..=Longitude:24 unsigned int DOP: 6; // // GPS Dilution of Precision unsigned int BaroMSB: 1; // // negated bit #8 of the altitude difference between baro and GPS unsigned int FixMode: 1; // // 0 = 2-D, 1 = 3-D unsigned int Altitude:14; // [m] VR // RRRR RRRR SSSS SSSS SSAA AAAA AAAA AAAA RR..=turn Rate:8, SS..=Speed:10, AA..=Alt:14 unsigned int Speed:10; // [0.1m/s] VR unsigned int TurnRate: 8; // [0.1deg/s] VR unsigned int Heading:10; // [360/1024deg] // BBBB BBBB YYYY PCCC CCCC CCDD DDDD DDDD BB..=Baro altitude:8, YYYY=AcftType:4, P=Stealth:1, CC..=Climb:9, DD..=Heading:10 unsigned int ClimbRate: 9; // [0.1m/s] VR // rate of climb/decent from GPS or from baro sensor unsigned int Stealth: 1; // // not really used till now unsigned int AcftType: 4; // [0..15] // type of aircraft: 1 = glider, 2 = towplane, 3 = helicopter, ... unsigned int BaroAltDiff: 8; // [m] // lower 8 bits of the altitude difference between baro and GPS } Position; struct { unsigned int Pulse : 8; // [bpm] // pilot: heart pulse rate unsigned int Oxygen : 7; // [%] // pilot: oxygen level in the blood unsigned int SatSNR : 5; // [dB] // average SNR of GPS signals // unsigned int FEScurr : 5; // [A] // FES current unsigned int RxRate : 4; // [/min] // log2 of received packet rate unsigned int Time : 6; // [sec] // same as in the position packet unsigned int FixQuality: 2; unsigned int AudioNoise: 8; // [dB] // unsigned int RadioNoise: 8; // [dBm] // noise seen by the RF chip unsigned int Temperature:8; // [0.1degC] VR // temperature by the baro or RF chip unsigned int Humidity : 8; // [0.1%] VR // humidity unsigned int Altitude :14; // [m] VR // same as in the position packet unsigned int Pressure :14; // [0.08hPa] // barometric pressure unsigned int Satellites: 4; // [ ] unsigned int Firmware : 8; // [ ] // firmware version unsigned int Hardware : 8; // [ ] // hardware version unsigned int TxPower : 4; // [dBm] // RF trancmitter power (offset = 4) unsigned int ReportType: 4; // [0] // 0 for the status report unsigned int Voltage : 8; // [1/64V] VR // supply/battery voltage } Status; union { uint8_t Byte[16]; struct { uint8_t Data[14]; // [16x7bit]packed string of 16-char: 7bit/char uint8_t DataChars: 4; // [int] number of characters in the packed string uint8_t ReportType: 4; // [1] // 1 for the Info packets uint8_t Check; // CRC check } ; } Info; struct { signed int Latitude:24; // // Latitude of the measurement unsigned int Time: 6; // [sec] // time, just second thus ambiguity every every minute unsigned int : 2; // // spare signed int Longitude:24; // // Longitude of the measurement unsigned int : 6; // // spare unsigned int BaroMSB: 1; // // negated bit #8 of the altitude difference between baro and GPS unsigned int : 1; // // spare unsigned int Altitude:14; // [m] VR // Altitude of the measurement unsigned int Speed:10; // [0.1m/s] VR // Horizontal wind speed unsigned int : 8; // // spare unsigned int Heading:10; // // Wind direction unsigned int ClimbRate: 9; // [0.1m/s] VR // Vertical wind speed unsigned int : 1; // // spare unsigned int ReportType: 4; // // 2 for wind/thermal report unsigned int BaroAltDiff: 8; // [m] // lower 8 bits of the altitude difference between baro and GPS } Wind; } ; uint8_t *Byte(void) const { return (uint8_t *)&HeaderWord; } // packet as bytes uint32_t *Word(void) const { return (uint32_t *)&HeaderWord; } // packet as words // void recvBytes(const uint8_t *SrcPacket) { memcpy(Byte(), SrcPacket, Bytes); } // load data bytes e.g. from a demodulator static const uint8_t InfoParmNum = 14; // [int] number of info-parameters and their names static const char *InfoParmName(uint8_t Idx) { static const char *Name[InfoParmNum] = { "Pilot", "Manuf", "Model", "Type", "SN", "Reg", "ID", "Class", "Task" , "Base" , "ICE" , "PilotID", "Hard", "Soft" } ; return Idx>6, 3, 2); Out[Len++]='V'; Out[Len++]=' '; Len+=Format_UnsDec(Out+Len, Status.TxPower+4); Out[Len++]='/'; Out[Len++]='-'; Len+=Format_UnsDec(Out+Len, 5*Status.RadioNoise, 2, 1); Out[Len++]='d'; Out[Len++]='B'; Out[Len++]='m'; Out[Len++]=' '; Len+=Format_UnsDec(Out+Len, (1<>16)); Len+=Format_Hex(JSON+Len, (uint16_t)(Header.Address)); JSON[Len++]='\"'; JSON[Len++]=','; Len+=Format_String(JSON+Len, "\"addr_type\":"); JSON[Len++] = HexDigit(Header.AddrType); if(!Header.Encrypted && !Header.NonPos) // if non-encrypted position { Len+=Format_String(JSON+Len, ",\"acft_type\":\""); JSON[Len++] = HexDigit(Position.AcftType); JSON[Len++]='\"'; Len+=Format_String(JSON+Len, ",\"acft_cat\":\""); // GDL90 aircraft category // no-info, glider, tow, heli, parachute, drop-plane, hang-glider, para-glider, powered, jet, UFO, balloon, Zeppelin, UAV, ground vehicle, static } ; const uint8_t AcftCat[16] = { 0, 9, 1, 7, 11, 1, 12, 12, 1, 2, 0, 10, 10, 14, 18, 19 } ; Len+=Format_Hex(JSON+Len, AcftCat[Position.AcftType]); JSON[Len++]='\"'; Len+=Format_String(JSON+Len, ",\"stealth\":"); JSON[Len++] = '0'+Position.Stealth; Len+=Format_String(JSON+Len, ",\"lat_deg\":"); Len+=Format_SignDec(JSON+Len, (int32_t)(((int64_t)50*DecodeLatitude()+1)/3), 8, 7, 1); Len+=Format_String(JSON+Len, ",\"lon_deg\":"); Len+=Format_SignDec(JSON+Len, (int32_t)(((int64_t)50*DecodeLongitude()+1)/3), 8, 7, 1); int32_t Altitude=DecodeAltitude(); Len+=Format_String(JSON+Len, ",\"alt_msl_m\":"); Len+=Format_UnsDec(JSON+Len, (uint32_t)Altitude); if(hasBaro()) { Altitude+=getBaroAltDiff(); Len+=Format_String(JSON+Len, ",\"alt_std_m\":"); Len+=Format_SignDec(JSON+Len, Altitude, 1, 0, 1); } Len+=Format_String(JSON+Len, ",\"track_deg\":"); Len+=Format_UnsDec(JSON+Len, DecodeHeading(), 2, 1); Len+=Format_String(JSON+Len, ",\"speed_mps\":"); Len+=Format_UnsDec(JSON+Len, DecodeSpeed(), 2, 1); Len+=Format_String(JSON+Len, ",\"climb_mps\":"); Len+=Format_SignDec(JSON+Len, DecodeClimbRate(), 2, 1, 1); Len+=Format_String(JSON+Len, ",\"turn_dps\":"); Len+=Format_SignDec(JSON+Len, DecodeTurnRate(), 2, 1, 1); Len+=Format_String(JSON+Len, ",\"DOP\":"); Len+=Format_UnsDec(JSON+Len, 10+DecodeDOP(), 2, 1); } if(!Header.Encrypted && Header.NonPos) // non-encrypted status and info { if(Status.ReportType==0) // status { } if(Status.ReportType==1) // info { char Value[16]; uint8_t InfoType; uint8_t Idx=0; for( ; ; ) { uint8_t Chars = readInfo(Value, InfoType, Idx); if(Chars==0) break; if(InfoTypeICAO_address = HeaderWord&0x03FFFFFF; MAV->lat = ((int64_t)50*DecodeLatitude()+1)/3; MAV->lon = ((int64_t)50*DecodeLongitude()+1)/3; MAV->altitude = 1000*DecodeAltitude(); MAV->heading = 10*DecodeHeading(); MAV->hor_velocity = 10*DecodeSpeed(); MAV->ver_velocity = 10*DecodeClimbRate(); MAV->flags = 0x17; MAV->altitude_type = 1; MAV->callsign[0] = 0; MAV->tslc = 0; MAV->emiter_type = 0; } */ void Encode(MAV_ADSB_VEHICLE *MAV) { MAV->ICAO_address = Header.Address; MAV->lat = ((int64_t)50*DecodeLatitude()+1)/3; // convert coordinates to [1e-7deg] MAV->lon = ((int64_t)50*DecodeLongitude()+1)/3; MAV->altitude = 1000*DecodeAltitude(); // convert to [mm[ MAV->heading = 10*DecodeHeading(); // [cdeg/s] MAV->hor_velocity = 10*DecodeSpeed(); // [cm/s] MAV->ver_velocity = 10*DecodeClimbRate(); // [cm/s] MAV->flags = 0x1F; // all valid except for Squawk, not simulated MAV->altitude_type = 1; // GPS altitude const static char Prefix[4] = { 'R', 'I', 'F', 'O' }; // prefix for Random, ICAO, Flarm and OGN address-types MAV->callsign[0] = Prefix[Header.AddrType]; // create a call-sign from address-type and address Format_Hex((char *)MAV->callsign+1, ( uint8_t)(Header.Address>>16)); // highest byte Format_Hex((char *)MAV->callsign+3, (uint16_t)(Header.Address&0xFFFF)); // two lower bytes MAV->callsign[7] = 0; // end-of-string for call-sign MAV->squawk = 0; // what shall we put there for OGN ? MAV->tslc = 1; // 1sec for now but should be more precise const static uint8_t EmitterType[16] = // conversion table from OGN aircraft-type { 0, 9, 2, 7, // unknown, glider, towplane, helicopter 11, 3, 9, 11, // parachute, drop plane, hang-glider, para-glider 2, 3, 15, 10, // powered aircraft, jet aircraft, UFO, balloon 10, 14, 2, 19 }; // airship, UAV, ground vehiele, fixed object MAV->emiter_type = EmitterType[Position.AcftType]; // convert from the OGN } static const char *getAprsIcon(uint8_t AcftType) { static const char *AprsIcon[16] = // Icons for various FLARM acftType's { "/z", // 0 = ? "/'", // 1 = (moto-)glider (most frequent) "/'", // 2 = tow plane (often) "/X", // 3 = helicopter (often) "/g" , // 4 = parachute (rare but seen - often mixed with drop plane) "\\^", // 5 = drop plane (seen) "/g" , // 6 = hang-glider (rare but seen) "/g" , // 7 = para-glider (rare but seen) "\\^", // 8 = powered aircraft (often) "/^", // 9 = jet aircraft (rare but seen) "/z", // A = UFO (people set for fun) "/O", // B = balloon (seen once) "/O", // C = airship (seen once) "/'", // D = UAV (drones, can become very common) "/z", // E = ground support (ground vehicles at airfields) "\\n" // F = static object (ground relay ?) } ; return AcftType<16 ? AprsIcon[AcftType]:0; } int8_t ReadAPRS(const char *Msg) // read an APRS position message { Clear(); const char *Data = strchr(Msg, ':'); if(Data==0) return -1; // where the time/position data starts Data++; const char *Dest = strchr(Msg, '>'); if(Dest==0) return -1; // where the destination call is Dest++; const char *Comma = strchr(Dest, ','); // the first comma after the destination call Position.AcftType=0xF; uint8_t AddrType; uint32_t Address; if(memcmp(Msg, "RND", 3)==0) AddrType=0; else if(memcmp(Msg, "ICA", 3)==0) AddrType=1; else if(memcmp(Msg, "FLR", 3)==0) AddrType=2; else if(memcmp(Msg, "OGN", 3)==0) AddrType=3; else AddrType=4; if(AddrType<4) { if(Read_Hex(Address, Msg+3)==6) Header.Address=Address; Header.AddrType=AddrType; } if(Comma) { if(memcmp(Comma+1, "RELAY*" , 6)==0) Header.Relay=1; else if(Comma[10]=='*') Header.Relay=1; } if(Data[0]!='/') return -1; int8_t Time; if(Data[7]=='h') // HHMMSS UTC time { Time=Read_Dec2(Data+5); if(Time<0) return -1; } else if(Data[7]=='z') // DDHHMM UTC time { Time=0; } else return -1; Position.Time=Time; Data+=8; Position.FixMode=1; Position.FixQuality=1; EncodeDOP(0xFF); int8_t LatDeg = Read_Dec2(Data); if(LatDeg<0) return -1; int8_t LatMin = Read_Dec2(Data+2); if(LatMin<0) return -1; if(Data[4]!='.') return -1; int8_t LatFrac = Read_Dec2(Data+5); if(LatFrac<0) return -1; int32_t Latitude = (int32_t)LatDeg*600000 + (int32_t)LatMin*10000 + (int32_t)LatFrac*100; char LatSign = Data[7]; Data+=8+1; int16_t LonDeg = Read_Dec3(Data); if(LonDeg<0) return -1; int8_t LonMin = Read_Dec2(Data+3); if(LonMin<0) return -1; if(Data[5]!='.') return -1; int8_t LonFrac = Read_Dec2(Data+6); if(LonFrac<0) return -1; int32_t Longitude = (int32_t)LonDeg*600000 + (int32_t)LonMin*10000 + (int32_t)LonFrac*100; char LonSign = Data[8]; Data+=9+1; int16_t Speed=0; int16_t Heading=0; if(Data[3]=='/') { Heading=Read_Dec3(Data); Speed=Read_Dec3(Data+4); Data+=7; } EncodeHeading(Heading*10); EncodeSpeed(((int32_t)Speed*337146+0x8000)>>16); uint32_t Altitude=0; if( (Data[0]=='/') && (Data[1]=='A') && (Data[2]=='=') && (Read_UnsDec(Altitude, Data+3)==6) ) { Data+=9; } EncodeAltitude(FeetToMeters(Altitude)); for( ; ; ) { if(Data[0]!=' ') break; Data++; if( (Data[0]=='!') && (Data[1]=='W') && (Data[4]=='!') ) { Latitude += (Data[2]-'0')*10; Longitude += (Data[3]-'0')*10; Data+=5; continue; } if( (Data[0]=='i') && (Data[1]=='d') ) { uint32_t ID; Read_Hex(ID, Data+2); Header.Address = ID&0x00FFFFFF; Header.AddrType = (ID>>24)&0x03; Position.AcftType = (ID>>26)&0x0F; Position.Stealth = ID>>31; Data+=10; continue; } if( (Data[0]=='F') && (Data[1]=='L') && (Data[5]=='.') ) { int16_t FLdec=Read_Dec3(Data+2); int16_t FLfrac=Read_Dec2(Data+6); if( (FLdec>=0) && (FLfrac>=0) ) { uint32_t StdAlt = FLdec*100+FLfrac; EncodeStdAltitude(FeetToMeters(StdAlt)); } Data+=8; continue; } if( (Data[0]=='+') || (Data[0]=='-') ) { int32_t Value; int8_t Len=Read_Float1(Value, Data); if(Len>0) { Data+=Len; if(memcmp(Data, "fpm", 3)==0) { EncodeClimbRate((333*Value+0x8000)>>16); Data+=3; continue; } if(memcmp(Data, "rot", 3)==0) { EncodeTurnRate(3*Value); Data+=3; continue; } } } if( (Data[0]=='g') && (Data[1]=='p') && (Data[2]=='s') ) { int16_t HorPrec=Read_Dec2(Data+3); if(HorPrec<0) HorPrec=Read_Dec1(Data[3]); if(HorPrec>=0) { uint16_t DOP=HorPrec*5; if(DOP<10) DOP=10; else if(DOP>230) DOP=230; EncodeDOP(DOP-10); Data+=5; } } while(Data[0]>' ') Data++; } if(LatSign=='S') Latitude=(-Latitude); else if(LatSign!='N') return -1; EncodeLatitude(Latitude); if(LonSign=='W') Longitude=(-Longitude); else if(LonSign!='E') return -1; EncodeLongitude(Longitude); return 0; } uint8_t WriteAPRS(char *Msg, uint32_t Time, const char *ProtName="APRS") // write an APRS position message { uint8_t Len=0; static const char *AddrTypeName[4] = { "RND", "ICA", "FLR", "OGN" } ; memcpy(Msg+Len, AddrTypeName[Header.AddrType], 3); Len+=3; Len+=Format_Hex(Msg+Len, (uint8_t)(Header.Address>>16)); Len+=Format_Hex(Msg+Len, (uint16_t)(Header.Address)); Msg[Len++] = '>'; uint8_t ProtLen = strlen(ProtName); memcpy(Msg+Len, ProtName, ProtLen); Len+=ProtLen; if(Header.Relay) { memcpy(Msg+Len, ",RELAY*", 7); Len+=7; } Msg[Len++] = ':'; if(Header.NonPos && Status.ReportType!=0) return 0; // give up if neither position nor status if(Position.Time<60) { uint32_t DayTime=Time%86400; int Sec=DayTime%60; // second of the time the packet was recevied int DiffSec=Position.Time-Sec; if(DiffSec>4) DiffSec-=60; // difference should always be zero or negative, but can be small positive for predicted positions Time+=DiffSec; } // get out the correct position time Msg[Len++] = Header.NonPos?'>':'/'; Len+=Format_HHMMSS(Msg+Len, Time); Msg[Len++] = 'h'; if(Header.NonPos) { Len+=WriteStatus(Msg+Len); Msg[Len++]='\n'; Msg[Len]=0; return Len; } const char *Icon = getAprsIcon(Position.AcftType); int32_t Lat = DecodeLatitude(); bool NegLat = Lat<0; if(NegLat) Lat=(-Lat); uint32_t LatDeg = Lat/600000; Len+=Format_UnsDec(Msg+Len, LatDeg, 2); Lat -= LatDeg*600000; uint32_t LatMin = Lat/100; Len+=Format_UnsDec(Msg+Len, LatMin, 4, 2); Lat -= LatMin*100; Msg[Len++] = NegLat ? 'S':'N'; Msg[Len++] = Icon[0]; int32_t Lon = DecodeLongitude(); bool NegLon = Lon<0; if(NegLon) Lon=(-Lon); uint32_t LonDeg = Lon/600000; Len+=Format_UnsDec(Msg+Len, LonDeg, 3); Lon -= LonDeg*600000; uint32_t LonMin = Lon/100; Len+=Format_UnsDec(Msg+Len, LonMin, 4, 2); Lon -= LonMin*100; Msg[Len++] = NegLon ? 'W':'E'; Msg[Len++] = Icon[1]; Len+=Format_UnsDec(Msg+Len, (DecodeHeading()+5)/10, 3); Msg[Len++] = '/'; Len+=Format_UnsDec(Msg+Len, ((uint32_t)DecodeSpeed()*199+512)>>10, 3); Msg[Len++] = '/'; Msg[Len++] = 'A'; Msg[Len++] = '='; Len+=Format_UnsDec(Msg+Len, MetersToFeet(DecodeAltitude()), 6); Msg[Len++] = ' '; Msg[Len++] = '!'; Msg[Len++] = 'W'; Msg[Len++] = '0'+Lat/10; Msg[Len++] = '0'+Lon/10; Msg[Len++] = '!'; Msg[Len++] = ' '; Msg[Len++] = 'i'; Msg[Len++] = 'd'; Len+=Format_Hex(Msg+Len, ((uint32_t)Position.AcftType<<26) | ((uint32_t)Header.AddrType<<24) | Header.Address); Msg[Len++] = ' '; Len+=Format_SignDec(Msg+Len, ((int32_t)DecodeClimbRate()*10079+256)>>9, 3); Msg[Len++] = 'f'; Msg[Len++] = 'p'; Msg[Len++] = 'm'; Msg[Len++] = ' '; Len+=Format_SignDec(Msg+Len, DecodeTurnRate()/3, 2, 1); Msg[Len++] = 'r'; Msg[Len++] = 'o'; Msg[Len++] = 't'; if(hasBaro()) { int32_t Alt = DecodeStdAltitude(); if(Alt<0) Alt=0; Msg[Len++] = ' '; Msg[Len++] = 'F'; Msg[Len++] = 'L'; Len+=Format_UnsDec(Msg+Len, MetersToFeet((uint32_t)Alt), 5, 2); } uint16_t DOP=10+DecodeDOP(); uint16_t HorPrec=(DOP*2+5)/10; if(HorPrec>63) HorPrec=63; uint16_t VerPrec=(DOP*3+5)/10; if(VerPrec>63) VerPrec=63; Msg[Len++] = ' '; Msg[Len++] = 'g'; Msg[Len++] = 'p'; Msg[Len++] = 's'; Len+=Format_UnsDec(Msg+Len, HorPrec); Msg[Len++] = 'x'; Len+=Format_UnsDec(Msg+Len, VerPrec); Msg[Len++]='\n'; Msg[Len]=0; return Len; } #endif // __AVR__ // calculate distance vector [LatDist, LonDist] from a given reference [RefLat, Reflon] int calcDistanceVector(int32_t &LatDist, int32_t &LonDist, int32_t RefLat, int32_t RefLon, uint16_t LatCos=3000, int32_t MaxDist=0x7FFF) { LatDist = ((DecodeLatitude()-RefLat)*1517+0x1000)>>13; // convert from 1/600000deg to meters (40000000m = 360deg) => x 5/27 = 1517/(1<<13) if(abs(LatDist)>MaxDist) return -1; LonDist = ((DecodeLongitude()-RefLon)*1517+0x1000)>>13; if(abs(LonDist)>(4*MaxDist)) return -1; LonDist = (LonDist*LatCos+0x800)>>12; if(abs(LonDist)>MaxDist) return -1; return 1; } // sets position [Lat, Lon] according to given distance vector [LatDist, LonDist] from a reference point [RefLat, RefLon] void setDistanceVector(int32_t LatDist, int32_t LonDist, int32_t RefLat, int32_t RefLon, uint16_t LatCos=3000) { EncodeLatitude(RefLat+(LatDist*27)/5); LonDist = (LonDist<<12)/LatCos; // LonDist/=cosine(Latitude) EncodeLongitude(RefLon+(LonDist*27)/5); } // Centripetal acceleration static int16_t calcCPaccel(int16_t Speed, int16_t TurnRate) { return ((int32_t)TurnRate*Speed*229+0x10000)>>17; } // [0.1m/s^2] int16_t calcCPaccel(void) { return calcCPaccel(DecodeSpeed(), DecodeTurnRate()); } // Turn radius static int16_t calcTurnRadius(int16_t Speed, int16_t TurnRate, int16_t MaxRadius=0x7FFF) // [m] ([0.1m/s], [], [m]) { if(TurnRate==0) return 0; int32_t Radius = 14675*Speed; Radius /= TurnRate; Radius = (Radius+128)>>8; if(abs(Radius)>MaxRadius) return 0; return Radius; } int16_t calcTurnRadius(int16_t MaxRadius=0x7FFF) { return calcTurnRadius(DecodeSpeed(), DecodeTurnRate(), MaxRadius); } uint8_t Print(char *Out) const { uint8_t Len=0; Out[Len++]=HexDigit(Position.AcftType); Out[Len++]=':'; Out[Len++]='0'+Header.AddrType; Out[Len++]=':'; uint32_t Addr = Header.Address; Len+=Format_Hex(Out+Len, (uint8_t)(Addr>>16)); Len+=Format_Hex(Out+Len, (uint16_t)Addr); Out[Len++]=' '; // Len+=Format_SignDec(Out+Len, -(int16_t)RxRSSI/2); Out[Len++]='d'; Out[Len++]='B'; Out[Len++]='m'; // Out[Len++]=' '; Len+=Format_UnsDec(Out+Len, (uint16_t)Position.Time, 2); Out[Len++]=' '; Len+=Format_Latitude(Out+Len, DecodeLatitude()); Out[Len++]=' '; Len+=Format_Longitude(Out+Len, DecodeLongitude()); Out[Len++]=' '; Len+=Format_UnsDec(Out+Len, (uint32_t)DecodeAltitude()); Out[Len++]='m'; Out[Len++]=' '; Len+=Format_UnsDec(Out+Len, DecodeSpeed(), 2, 1); Out[Len++]='m'; Out[Len++]='/'; Out[Len++]='s'; Out[Len++]=' '; Len+=Format_SignDec(Out+Len, DecodeClimbRate(), 2, 1); Out[Len++]='m'; Out[Len++]='/'; Out[Len++]='s'; Out[Len++]='\n'; Out[Len]=0; return Len; } // OGN1_Packet() { Clear(); } void Clear(void) { HeaderWord=0; Data[0]=0; Data[1]=0; Data[2]=0; Data[3]=0; } uint32_t getAddressAndType(void) const { return HeaderWord&0x03FFFFFF; } // Address with address-type: 26-bit void setAddressAndType(uint32_t AddrAndType) { HeaderWord = (HeaderWord&0xFC000000) | (AddrAndType&0x03FFFFFF); } bool goodAddrParity(void) const { return ((Count1s(HeaderWord&0x0FFFFFFF)&1)==0); } // Address parity should be EVEN void calcAddrParity(void) { if(!goodAddrParity()) HeaderWord ^= 0x08000000; } // if not correct parity, flip the parity bit void EncodeLatitude(int32_t Latitude) // encode Latitude: units are 0.0001/60 degrees { Position.Latitude = Latitude>>3; } int32_t DecodeLatitude(void) const { int32_t Latitude = Position.Latitude; // if(Latitude&0x00800000) Latitude|=0xFF000000; Latitude = (Latitude<<3)+4; return Latitude; } void EncodeLongitude(int32_t Longitude) // encode Longitude: units are 0.0001/60 degrees { Position.Longitude = Longitude>>=4; } int32_t DecodeLongitude(void) const { int32_t Longitude = Position.Longitude; Longitude = (Longitude<<4)+8; return Longitude; } bool hasBaro(void) const { return Position.BaroMSB || Position.BaroAltDiff; } void clrBaro(void) { Position.BaroMSB=0; Position.BaroAltDiff=0; } int16_t getBaroAltDiff(void) const { int16_t AltDiff=Position.BaroAltDiff; if(Position.BaroMSB==0) AltDiff|=0xFF00; return AltDiff; } void setBaroAltDiff(int32_t AltDiff) { if(AltDiff<(-255)) AltDiff=(-255); else if(AltDiff>255) AltDiff=255; Position.BaroMSB = (AltDiff&0xFF00)==0; Position.BaroAltDiff=AltDiff&0xFF; } void EncodeStdAltitude(int32_t StdAlt) { setBaroAltDiff((StdAlt-DecodeAltitude())); } int32_t DecodeStdAltitude(void) const { return (DecodeAltitude()+getBaroAltDiff()); } void EncodeAltitude(int32_t Altitude) // encode altitude in meters { if(Altitude<0) Altitude=0; Position.Altitude = UnsVRencode((uint16_t)Altitude); } // Position.Altitude = EncodeUR2V12((uint16_t)Altitude); } int32_t DecodeAltitude(void) const // return Altitude in meters { return UnsVRdecode(Position.Altitude); } // { return DecodeUR2V12(Position.Altitude); } void EncodeDOP(uint8_t DOP) { Position.DOP = UnsVRencode(DOP); } // { Position.DOP = EncodeUR2V4(DOP); } uint8_t DecodeDOP(void) const { return UnsVRdecode(Position.DOP); } // { return DecodeUR2V4(Position.DOP); } void EncodeSpeed(int16_t Speed) // speed in 0.2 knots (or 0.1m/s) { if(Speed<0) Speed=0; else Speed = UnsVRencode(Speed); // EncodeUR2V8(Speed); Position.Speed = Speed; } int16_t DecodeSpeed(void) const // return speed in 0.2 knots or 0.1m/s units { return UnsVRdecode(Position.Speed); } // { return DecodeUR2V8(Position.Speed); } // => max. speed: 3832*0.2 = 766 knots int16_t DecodeHeading(void) const // return Heading in 0.1 degree units 0..359.9 deg { int32_t Heading = Position.Heading; return (Heading*3600+512)>>10; } void EncodeHeading(int16_t Heading) { Position.Heading = (((int32_t)Heading<<10)+180)/3600; } void setHeadingAngle(uint16_t HeadingAngle) { Position.Heading = (((HeadingAngle+32)>>6)); } uint16_t getHeadingAngle(void) const { return (uint16_t)Position.Heading<<6; } void clrTurnRate(void) { Position.TurnRate=0x80; } bool hasTurnRate(void) const { return Position.TurnRate==0x80; } void EncodeTurnRate(int16_t Turn) // [0.1 deg/sec] { Position.TurnRate = EncodeSR2V5(Turn); } int16_t DecodeTurnRate(void) const { return DecodeSR2V5(Position.TurnRate); } void clrClimbRate(void) { Position.ClimbRate=0x100; } bool hasClimbRate(void) const { return Position.ClimbRate==0x100; } void EncodeClimbRate(int16_t Climb) { Position.ClimbRate = EncodeSR2V6(Climb); } int16_t DecodeClimbRate(void) const { return DecodeSR2V6(Position.ClimbRate); } // -------------------------------------------------------------------------------------------------------------- // Status fields void clrTemperature(void) { Status.Temperature=0x80; } bool hasTemperature(void) const { return Status.Temperature!=0x80; } void EncodeTemperature(int16_t Temp) { Status.Temperature=EncodeSR2V5(Temp-200); } // [0.1degC] int16_t DecodeTemperature(void) const { return 200+DecodeSR2V5(Status.Temperature); } void EncodeVoltage(uint16_t Voltage) { Status.Voltage=EncodeUR2V6(Voltage); } // [1/64V] uint16_t DecodeVoltage(void) const { return DecodeUR2V6(Status.Voltage); } void clrHumidity(void) { Status.Humidity=0x80; } bool hasHumidity(void) const { return Status.Humidity!=0x80; } void EncodeHumidity(uint16_t Hum) { Status.Humidity=EncodeSR2V5((int16_t)(Hum-520)); } // [0.1%] uint16_t DecodeHumidity(void) const { return 520+DecodeSR2V5(Status.Humidity); } // -------------------------------------------------------------------------------------------------------------- // Info fields: pack and unpack 7-bit char into the Info packets void setInfoChar(uint8_t Char, uint8_t Idx) // put 7-bit Char onto give position { if(Idx>=16) return; // Idx = 0..15 Char&=0x7F; uint8_t BitIdx = Idx*7; // [bits] bit index to the target field Idx = BitIdx>>3; // [bytes] index of the first byte to change uint8_t Ofs = BitIdx&0x07; if(Ofs==0) { Info.Data[Idx] = (Info.Data[Idx]&0x80) | Char ; return; } if(Ofs==1) { Info.Data[Idx] = (Info.Data[Idx]&0x01) | (Char<<1) ; return; } uint8_t Len1 = 8-Ofs; uint8_t Len2 = Ofs-1; uint8_t Msk1 = 0xFF; Msk1<<=Ofs; uint8_t Msk2 = 0x01; Msk2 = (Msk2<>Len1); } uint8_t getInfoChar(uint8_t Idx) const // get 7-bit Char from given position { if(Idx>=16) return 0; // Idx = 0..15 uint8_t BitIdx = Idx*7; // [bits] bit index to the target field Idx = BitIdx>>3; // [bytes] index of the first byte to change uint8_t Ofs = BitIdx&0x07; if(Ofs==0) return Info.Data[Idx]&0x7F; if(Ofs==1) return Info.Data[Idx]>>1; uint8_t Len = 8-Ofs; return (Info.Data[Idx]>>Ofs) | ((Info.Data[Idx+1]<=15) return 0; uint8_t Len=0; for( ; ; ) { uint8_t Char = Value[Len]; if(Char==0) break; if(Idx>=15) return 0; setInfoChar(Char, Idx++); Len++; } setInfoChar(InfoType, Idx); // terminating character Info.DataChars=Idx; // update number of characters return Len+1; } // return number of added Value characters uint8_t readInfo(char *Value, uint8_t &InfoType, uint8_t ValueIdx=0) const { uint8_t Len=0; // count characters in the info-string uint8_t Chars = Info.DataChars; // total number of characters in the record char Char=0; for( ; ; ) // loop over characters { if((ValueIdx+Len)>Chars) return 0; // return failure if overrun the data Char = getInfoChar(ValueIdx+Len); // get the character if(Char<0x20) break; // if less than 0x20 (space) then this is the terminator Value[Len++]=Char; } Value[Len]=0; // null-terminate the infor string InfoType=Char; // get the info-type: Pilot, Type, etc. return Len+1; } // return number of character taken thus info length + terminator uint8_t InfoCheck(void) const { uint8_t Check=0; for( uint8_t Idx=0; Idx<15; Idx++) { Check ^= Info.Byte[Idx]; } // printf("Check = %02X\n", Check); return Check; } void setInfoCheck(void) { Info.Check = InfoCheck(); // printf("Check = %02X\n", Info.Check); } uint8_t goodInfoCheck(void) const { return Info.Check == InfoCheck(); } // -------------------------------------------------------------------------------------------------------------- void Encrypt (const uint32_t Key[4]) { XXTEA_Encrypt(Data, 4, Key, 8); } // encrypt with given Key void Decrypt (const uint32_t Key[4]) { XXTEA_Decrypt(Data, 4, Key, 8); } // decrypt with given Key void Whiten (void) { TEA_Encrypt_Key0(Data, 8); TEA_Encrypt_Key0(Data+2, 8); } // whiten the position void Dewhiten(void) { TEA_Decrypt_Key0(Data, 8); TEA_Decrypt_Key0(Data+2, 8); } // de-whiten the position uint8_t getTxSlot(uint8_t Idx) const // Idx=0..15 { const uint32_t *DataPtr = Data; uint32_t Mask=1; Mask<<=Idx; uint8_t Slot=0; for(uint8_t Bit=0; Bit<6; Bit++) { Slot>>=1; if(DataPtr[Bit]&Mask) Slot|=0x20; Mask<<=1; Slot>>=1; } return EncodeGray(Slot); } } ; #endif // of __OGN1_H__