| [59] | 1 | #include "nmea0183.h"
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| 2 | #pragma hdrstop
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| 3 |
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| 4 | /*
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| 5 | ** Author: Samuel R. Blackburn
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| 6 | ** Internet: sam_blackburn@pobox.com
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| 7 | **
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| 8 | ** You can use it any way you like as long as you don't try to sell it.
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| 9 | **
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| 10 | ** Copyright, 1996, Samuel R. Blackburn
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| 11 | **
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| 12 | ** $Workfile: xte.cpp $
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| 13 | ** $Revision: 4 $
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| 14 | ** $Modtime: 10/10/98 2:39p $
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| 15 | */
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| 16 |
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| 17 |
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| 18 | XTE::XTE()
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| 19 | {
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| 20 | Mnemonic = "XTE";
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| 21 | Empty();
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| 22 | }
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| 23 |
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| 24 | XTE::~XTE()
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| 25 | {
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| 26 | //Mnemonic.Empty();
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| 27 | Empty();
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| 28 | }
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| 29 |
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| 30 | void XTE::Empty( void )
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| 31 | {
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| 32 | CrossTrackErrorMagnitude = 0.0;
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| 33 | DirectionToSteer = LR_Unknown;
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| 34 | //CrossTrackUnits.Empty();
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| 35 | }
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| 36 |
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| 37 | BOOL XTE::Parse( const SENTENCE& sentence )
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| 38 | {
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| 39 | QString field_data;
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| 40 |
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| 41 | /*
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| 42 | ** XTE - Cross-Track Error, Measured
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| 43 | **
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| 44 | ** 1 2 3 4 5 6
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| 45 | ** | | | | | |
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| 46 | ** $--XTE,A,A,x.x,a,N,*hh<CR><LF>
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| 47 | **
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| 48 | ** 1) Status
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| 49 | ** V = LORAN-C Blink or SNR warning
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| 50 | ** V = general warning flag or other navigation systems when a reliable
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| 51 | ** fix is not available
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| 52 | ** 2) Status
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| 53 | ** V = Loran-C Cycle Lock warning flag
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| 54 | ** A = OK or not used
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| 55 | ** 3) Cross Track Error Magnitude
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| 56 | ** 4) Direction to steer, L or R
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| 57 | ** 5) Cross Track Units, N = Nautical Miles
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| 58 | ** 6) Checksum
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| 59 | */
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| 60 |
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| 61 | /*
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| 62 | ** First we check the checksum...
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| 63 | */
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| 64 |
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| 65 | if ( sentence.IsChecksumBad( 6 ) == True )
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| 66 | {
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| 67 | SetErrorMessage( "Invalid Checksum" );
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| 68 | return( FALSE );
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| 69 | }
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| 70 |
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| 71 | /*
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| 72 | ** Line has already been checked for checksum validity
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| 73 | */
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| 74 |
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| 75 | IsLoranBlinkOK = sentence.Boolean( 1 );
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| 76 | IsLoranCCycleLockOK = sentence.Boolean( 2 );
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| 77 | CrossTrackErrorMagnitude = sentence.Double( 3 );
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| 78 | DirectionToSteer = sentence.LeftOrRight( 4 );
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| 79 | CrossTrackUnits = sentence.Field( 5 );
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| 80 |
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| 81 | return( TRUE );
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| 82 | }
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| 83 |
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| 84 | BOOL XTE::Write( SENTENCE& sentence )
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| 85 | {
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| 86 | /*
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| 87 | ** Let the parent do its thing
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| 88 | */
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| 89 |
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| 90 | RESPONSE::Write( sentence );
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| 91 |
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| 92 | sentence += IsLoranBlinkOK;
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| 93 | sentence += IsLoranCCycleLockOK;
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| 94 | sentence += CrossTrackErrorMagnitude;
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| 95 | sentence += DirectionToSteer;
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| 96 | sentence += CrossTrackUnits;
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| 97 |
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| 98 | sentence.Finish();
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| 99 |
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| 100 | return( TRUE );
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| 101 | }
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| 102 |
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| 103 | const XTE& XTE::operator = ( const XTE& source )
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| 104 | {
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| 105 | IsLoranBlinkOK = source.IsLoranBlinkOK;
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| 106 | IsLoranCCycleLockOK = source.IsLoranCCycleLockOK;
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| 107 | CrossTrackErrorMagnitude = source.CrossTrackErrorMagnitude;
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| 108 | DirectionToSteer = source.DirectionToSteer;
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| 109 | CrossTrackUnits = source.CrossTrackUnits;
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| 110 |
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| 111 | return( *this );
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| 112 | }
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