Andrew Boyson
A GPS disciplined clock
Dependencies: net lpc1768 crypto clock web log
Diff: web-this/nmea/web-nmea-script.js
- Revision:
- 60:7cab896b0fd4
- Parent:
- 59:d2d25c2265f8
--- a/web-this/nmea/web-nmea-script.js Wed May 01 10:14:26 2019 +0000
+++ b/web-this/nmea/web-nmea-script.js Wed May 01 14:08:56 2019 +0000
@@ -1,60 +1,58 @@
+//Nmea script
'use strict';
const NMEA_DEG_UNIT = 10000000;
const NMEA_HGT_UNIT = 1000000;
-var response = '';
-var headers = '';
-var gpsTrace = false;
-var gpsVerbose = false;
-var msgTrace = false;
-var cmdTrace = false;
-var lat = 0;
-var lng = 0;
-var hgt = 0;
-var hgtAboveMsl = 0;
-var mslAboveWgs = 0;
-var dop = 0;
-var satCount = 0;
-var fixQuality = 0;
-var sensorHeight = 0;
-var bucketCount = 0;
-var buckets = '';
+let gpsTrace = false;
+let gpsVerbose = false;
+let msgTrace = false;
+let cmdTrace = false;
+let lat = 0;
+let lng = 0;
+let hgt = 0;
+let hgtAboveMsl = 0;
+let mslAboveWgs = 0;
+let dop = 0;
+let satCount = 0;
+let fixQuality = 0;
+let sensorHeight = 0;
+let bucketCount = 0;
+let buckets = '';
-function hexToBit(iChar, iBit)
-{
- var value = parseInt(response.charAt(iChar), 16);
- value >>= iBit;
- return value & 1;
-}
-function parseSint32fromHex(value)
+function parseVariables(text)
{
- value = parseInt(value, 16);
- if (value > 0x7FFFFFFF) value -= 0xFFFFFFFF;
- return value;
+ let lines = text.split('\n');
+ gpsTrace = Ajax.hexToBit (lines[0], 0);
+ gpsVerbose = Ajax.hexToBit (lines[0], 1);
+ msgTrace = Ajax.hexToBit (lines[0], 2);
+ cmdTrace = Ajax.hexToBit (lines[0], 3);
+ lat = Ajax.hexToSignedInt32(lines[1]);
+ lng = Ajax.hexToSignedInt32(lines[2]);
+ hgt = Ajax.hexToSignedInt32(lines[3]);
+ hgtAboveMsl = Ajax.hexToSignedInt32(lines[4]);
+ mslAboveWgs = Ajax.hexToSignedInt32(lines[5]);
+ dop = Ajax.hexToSignedInt32(lines[6]);
+ satCount = Ajax.hexToSignedInt32(lines[7]);
+ fixQuality = Ajax.hexToSignedInt32(lines[8]);
+ sensorHeight = Ajax.hexToSignedInt32(lines[9]);
}
-function parseAjax()
+function parseBuckets(text)
{
- gpsTrace = hexToBit(0, 0);
- gpsVerbose = hexToBit(0, 1);
- msgTrace = hexToBit(0, 2);
- cmdTrace = hexToBit(0, 3);
- lat = parseSint32fromHex(response.substr( 1, 8));
- lng = parseSint32fromHex(response.substr( 9, 8));
- hgt = parseSint32fromHex(response.substr(17, 8));
- hgtAboveMsl = parseSint32fromHex(response.substr(25, 8));
- mslAboveWgs = parseSint32fromHex(response.substr(33, 8));
- dop = parseSint32fromHex(response.substr(41, 8));
- satCount = parseSint32fromHex(response.substr(49, 8));
- fixQuality = parseSint32fromHex(response.substr(57, 8));
- sensorHeight = parseSint32fromHex(response.substr(65, 8));
- bucketCount = parseSint32fromHex(response.substr(73, 8));
+ let lines = text.split('\n');
+ bucketCount = Ajax.hexToSignedInt32(lines[0]);
buckets = '';
- for (var i = 0; i < bucketCount; i++)
+ for (let i = 0; i < bucketCount; i++)
{
- buckets += (i * 50).toString().padStart(3, '0') + ' ' + parseInt(response.substr(81 + i * 8, 8), 16) + '\r\n';
+ buckets += (i * 50).toString().padStart(3, '0') + ' ' + Ajax.hexToSignedInt32(lines[i + 1]) + '\r\n';
}
}
+function parse()
+{
+ let topics = Ajax.response.split('\f');
+ parseVariables(topics[0]);
+ parseBuckets (topics[1]);
+}
function degToString(plus, minus, deg)
{
deg /= NMEA_DEG_UNIT;
@@ -67,63 +65,31 @@
if (hgt >= 0) return plus + hgt.toFixed(1);
else return minus + (-hgt).toFixed(1);
}
-function displayGeneral()
+function display()
{
- var elem;
- elem = document.getElementById('ajax-trace-gps' ); if (elem) elem.setAttribute('dir', gpsTrace ? 'rtl' : 'ltr');
- elem = document.getElementById('ajax-trace-verbose'); if (elem) elem.setAttribute('dir', gpsVerbose ? 'rtl' : 'ltr');
- elem = document.getElementById('ajax-trace-msg' ); if (elem) elem.setAttribute('dir', msgTrace ? 'rtl' : 'ltr');
- elem = document.getElementById('ajax-trace-cmd' ); if (elem) elem.setAttribute('dir', cmdTrace ? 'rtl' : 'ltr');
+ let elem;
+ elem = Ajax.getElementOrNull('ajax-trace-gps' ); if (elem) elem.setAttribute('dir', gpsTrace ? 'rtl' : 'ltr');
+ elem = Ajax.getElementOrNull('ajax-trace-verbose'); if (elem) elem.setAttribute('dir', gpsVerbose ? 'rtl' : 'ltr');
+ elem = Ajax.getElementOrNull('ajax-trace-msg' ); if (elem) elem.setAttribute('dir', msgTrace ? 'rtl' : 'ltr');
+ elem = Ajax.getElementOrNull('ajax-trace-cmd' ); if (elem) elem.setAttribute('dir', cmdTrace ? 'rtl' : 'ltr');
- elem = document.getElementById('ajax-position' ); if (elem) elem.textContent = degToString('N', 'S', lat) + ' ' +
- degToString('E', 'W', lng) + ' ' +
- hgtToString('H', 'D', hgt);
- elem = document.getElementById('ajax-msl-above-wgs'); if (elem) elem.textContent = hgtToString('H', 'D', mslAboveWgs);
- elem = document.getElementById('ajax-hgt-above-msl'); if (elem) elem.textContent = hgtToString('H', 'D', hgtAboveMsl);
- elem = document.getElementById('ajax-gnd-above-msl'); if (elem) elem.textContent = hgtToString('H', 'D', hgtAboveMsl - sensorHeight * NMEA_HGT_UNIT);
+ elem = Ajax.getElementOrNull('ajax-position' ); if (elem) elem.textContent = degToString('N', 'S', lat) + ' ' +
+ degToString('E', 'W', lng) + ' ' +
+ hgtToString('H', 'D', hgt);
+ elem = Ajax.getElementOrNull('ajax-msl-above-wgs'); if (elem) elem.textContent = hgtToString('H', 'D', mslAboveWgs);
+ elem = Ajax.getElementOrNull('ajax-hgt-above-msl'); if (elem) elem.textContent = hgtToString('H', 'D', hgtAboveMsl);
+ elem = Ajax.getElementOrNull('ajax-gnd-above-msl'); if (elem) elem.textContent = hgtToString('H', 'D', hgtAboveMsl - sensorHeight * NMEA_HGT_UNIT);
- elem = document.getElementById('ajax-dop' ); if (elem) elem.textContent = dop / 100;
- elem = document.getElementById('ajax-sat-count' ); if (elem) elem.textContent = satCount;
- elem = document.getElementById('ajax-fix-quality' ); if (elem) elem.textContent = fixQuality;
-
- elem = document.getElementById('ajax-sensor-hgt' ); if (elem) elem.value = sensorHeight;
+ elem = Ajax.getElementOrNull('ajax-dop' ); if (elem) elem.textContent = dop / 100;
+ elem = Ajax.getElementOrNull('ajax-sat-count' ); if (elem) elem.textContent = satCount;
+ elem = Ajax.getElementOrNull('ajax-fix-quality' ); if (elem) elem.textContent = fixQuality;
- elem = document.getElementById('ajax-bucket-count' ); if (elem) elem.textContent = bucketCount;
- elem = document.getElementById('ajax-buckets' ); if (elem) elem.textContent = buckets;
-
- elem = document.getElementById('ajax-response' ); if (elem) elem.textContent = response;
- elem = document.getElementById('ajax-headers' ); if (elem) elem.textContent = headers;
+ elem = Ajax.getElementOrNull('ajax-sensor-hgt' ); if (elem) elem.value = sensorHeight;
+
+ elem = Ajax.getElementOrNull('ajax-bucket-count' ); if (elem) elem.textContent = bucketCount;
+ elem = Ajax.getElementOrNull('ajax-buckets' ); if (elem) elem.textContent = buckets;
}
-var ajax;
-function AjaxRequest(request) //Used by this script and from HTML page
-{
- ajax=new XMLHttpRequest();
- ajax.onreadystatechange=handleAjaxResponse;
- if (request) ajax.open('GET', '/nmea-ajax' + '?' + request, true);
- else ajax.open('GET', '/nmea-ajax' , true);
- ajax.send();
-}
-function requestAjax() //Used in this script
-{
- AjaxRequest('');
-}
-
-function handleAjaxResponse()
-{
- if (ajax.readyState==4 && ajax.status==200)
- {
- response = ajax.responseText;
- headers = ajax.getAllResponseHeaders();
- parseAjax();
- displayGeneral();
- }
-}
-
-function init()
-{
- setInterval(requestAjax, 10000);
- requestAjax();
-}
-if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', init ); // Loading hasn't finished yet
-else init(); //`DOMContentLoaded` has already fired
+Ajax.server = '/nmea-ajax';
+Ajax.onResponse = function() { parse(); display(); };
+Ajax.init();
\ No newline at end of file