b0a1993169
NMEA-0183 语句解析器，含 21 个语句类型 codec 与配套单元测试。 - codecs/：APB/BWC/DBT/GGA/GLL/GRMT/GSA/GSV/HDG/HDM/HDT/MWV/RDID/ RMB/RMC/ROT/RSA/TXT/VTG/VWR/ZDA - test/：各 codec 对应的 mocha 用例 - .github/workflows/：node与 npm-publish 流水线 许可证：MIT（原作者 James Penn）
45 lines
1.1 KiB
JavaScript
45 lines
1.1 KiB
JavaScript
var helpers = require("../helpers.js")
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/*
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=== DBT - Depth below transducer ===
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------------------------------------------------------------------------------
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*******1 2 3 4 5 6 7
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*******| | | | | | |
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$--DBT,x.x,f,x.x,M,x.x,F*hh<CR><LF>
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------------------------------------------------------------------------------
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Field Number:
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1. Depth, feet
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2. f = feet
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3. Depth, meters
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4. M = meters
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5. Depth, Fathoms
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6. F = Fathoms
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7. Checksum
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*/
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exports.TYPE = 'depth-transducer';
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exports.ID = 'DBT';
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exports.decode = function(fields) {
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return {
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sentence: exports.ID,
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type: exports.TYPE,
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depthMeters: +fields[3],
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depthFeet: +fields[1]
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}
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}
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exports.encode = function (talker, msg) {
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var result = ['$' + talker + exports.ID];
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result.push(helpers.encodeFixed(msg.depthFeet,2));
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result.push('f');
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result.push(helpers.encodeFixed(msg.depthMeters, 2));
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result.push('M');
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result.push(helpers.encodeFixed(msg.depthFathoms, 2));
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result.push('F');
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var resultMsg = result.join(',');
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return resultMsg + helpers.computeChecksum(resultMsg);
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} |