Merge pull request #3674 from pavelmachek/m_42_spacer

spacer: Compare GPS with Baido and Glonass

apps/spacer/ChangeLog

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+0.01: attempt to import

apps/spacer/README.md

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+# Space Race
+
+Compare GPS with Baido and Glonass
+
+This turns GNSS receiver into mode with all three systems enabled, and
+displays debug info from all of them. Click into top left corner to
+switch navigation systems.
+

apps/spacer/app-icon.js

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+require("heatshrink").decompress(atob("mEwgIQNgQFEj/gAof+jgECgeAAIIFBgwCBuACBhgCEjAOEAoQ6CmAhCDwItDoEB4AFCsEBFgUEkEDG4XEJYcL8gFCgUP+gxCAoP8DIIFBhfsiEIAoMJAogCBAoYlBiBMBAoUwrA0B////ALECI0QAocgAolgApVADolAHYnAAomAAoqdBAoKVBMoRvCOIQDCRIIFBYwKVBAoKqC4AFBVQVggTRDn0CYgQcBN4LpDV4T7IAooAJA="))
+

apps/spacer/metadata.json

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+{ "id": "spacer",
+  "name": "Space Race",
+  "version": "0.01",
+  "description": "Compare GPS with Baido and Glonass",
+  "icon": "app.png",
+  "readme": "README.md",
+  "supports" : ["BANGLEJS2"],
+  "tags": "tool",
+  "storage": [
+      {"name":"spacer.app.js","url":"spacer.app.js"},
+      {"name":"spacer.img","url":"app-icon.js","evaluate":true}
+  ]
+}

apps/spacer/spacer.app.js

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+/* Space race */
+
+/* 
+
+Performance Assessment of GNSS Signals in
+terms of Time to First Fix for
+Cold, Warm and Hot Start
+Matteo Paonni, Marco Anghileri, Stefan Wallner, José-Ángel Ávila-Rodríguez, Bernd Eissfeller
+Institute of Geodesy and Navigation, University FAF Munich, Germany
+
+=> 22 to 26 dB -- long time / no fix / ...
+=> 26db + -- basically strength no longer matters
+
+apps/assistedgps/custom.html
+
+https://github.com/espruino/EspruinoDocs/blob/master/info/Bangle.js2%20Technical.md#gps
+
+gsa mi rika 2d/3d fix, a taky pdop/vdop/hdop
+
+CFG-NAVX z CASIC_en -- umoznuje nastavit chodec / auto / letadlo
+
+MON-VER -- vrati version stringy
+
+CFG-PMS z gpssetup to zda se neumi?
+
+2.11.5 CFG-RATE (0x06 0x04)
+*/
+
+/* ui library 0.1.4 */
+let ui = {
+  display: 0,
+  numScreens: 2,
+  drawMsg: function(msg) {
+    g.reset().setFont("Vector", 35)
+      .setColor(1, 1, 1)
+      .fillRect(0, this.wi, this.w, this.y2)
+      .setColor(0, 0, 0)
+      .drawString(msg, 5, 30)
+      .flip();
+  },
+  drawBusy: function() {
+    this.drawMsg("\n.oO busy");
+  },
+  nextScreen: function() {
+    print("nextS");
+    this.display = this.display + 1;
+    if (this.display == this.numScreens)
+      this.display = 0;
+    this.drawBusy();
+  },
+  prevScreen: function() {
+    print("prevS");
+    this.display = this.display - 1;
+    if (this.display < 0)
+      this.display = this.numScreens - 1;
+    this.drawBusy();
+  },
+  onSwipe: function(dir) {
+    this.nextScreen();
+  },
+  wi: 24,
+  y2: 176,
+  h: 152,
+  w: 176,
+  last_b: 0,
+  topLeft: function() { this.drawMsg("Unimpl"); },
+  topRight: function() { this.drawMsg("Unimpl"); },
+  touchHandler: function(d) {
+    let x = Math.floor(d.x);
+    let y = Math.floor(d.y);
+
+    if (d.b != 1 || this.last_b != 0) {
+      this.last_b = d.b;
+      return;
+    }
+
+    print("touch", x, y, this.h, this.w);
+
+    if ((x<this.w/2) && (y<this.y2/2))
+      this.topLeft();
+    if ((x>this.w/2) && (y<this.y2/2))
+      this.topRight();
+    if ((x<this.w/2) && (y>this.y2/2)) {
+      print("prev");
+      this.prevScreen();
+    }
+    if ((x>this.w/2) && (y>this.y2/2)) {
+      print("next");
+      this.nextScreen();
+    }
+  },
+  init: function() {
+    this.h = this.y2 - this.wi;
+    this.drawBusy();
+  },
+  /* radial angle -- convert 0..1 to 0..2pi */
+  radA: function(p) { return p*(Math.PI*2); },
+  /* radial distance -- convert 0..1 to something that fits on screen */
+  radD: function(d) { return d*(ui.h/2); },
+
+  /* given angle/distance, get X coordinate */
+  radX: function(p, d) {
+    let a = this.radA(p);
+    return this.w/2 + Math.sin(a)*this.radD(d);
+  },
+  /* given angle/distance, get Y coordinate */
+  radY: function(p, d) {
+    let a = this.radA(p);
+    return this.h/2 - Math.cos(a)*this.radD(d) + this.wi;
+  },
+  radLine: function(a1, d1, a2, d2) {
+    g.drawLine(this.radX(a1, d1), this.radY(a1, d1), this.radX(a2, d2), this.radY(a2, d2));
+  },
+  radCircle: function(d) {
+    g.drawCircle(this.radX(0, 0), this.radY(0, 0), this.radD(d));
+    if (1)
+      return;
+    let step = 0.05;
+    for (let i = 0; i < 1; i += 0.05) {
+      this.radLine(i - step, d, i, d);
+    }
+  },
+};
+
+let fix = {}; /* Global for sky library */
+
+/* sky library v0.1.0 */
+let sky = {
+  sats: [],
+  snum: 0,
+  sats_used: 0,
+  sky_start: -1,
+  this_usable: 0,
+
+  drawGrid: function() {
+    g.setColor(0,0,0);
+    ui.radLine(0, 1, 0.5, 1);
+    ui.radLine(0.25, 1, 0.75, 1);
+    ui.radCircle(0.5);
+    ui.radCircle(1.0);
+  },
+
+  snrLim: 28,
+  drawSat: function(s) {
+    let a = s.azi / 360;
+    let e = ((90 - s.ele) / 90);
+    let x = ui.radX(a, e);
+    let y = ui.radY(a, e);
+
+    if (s.snr == 0)
+      g.setColor(1, 0.25, 0.25);  
+    else if (s.snr < this.snrLim)
+      g.setColor(0.25, 0.5, 0.25);
+    else
+      g.setColor(0, 0, 0);
+    g.drawString(s.id, x, y);
+  },
+
+  // Should correspond to view from below.
+  // https://in-the-sky.org//satmap_radar.php?year=2023&month=10&day=24&skin=1
+  decorate: function() {},
+  drawSats: function(sats) {
+    if (ui.display != 0)
+      return;
+    g.reset()
+      .setColor(1, 1, 1)
+      .fillRect(0, ui.wi, ui.w, ui.y2)
+      .setFont("Vector", 20)
+      .setFontAlign(0, 0);
+    this.drawGrid();
+    sats.forEach(s => this.drawSat(s));
+
+    if (fix && fix.fix && fix.lat) {
+      g.setColor(0, 0, 0)
+       .setFontAlign(-1, 1);
+      g.drawString(fix.satellites + "/" + fix.hdop, 5, ui.y2);
+    }
+    this.decorate();
+  },
+
+  parseSats: function(s) {
+    let view = 1 * s[3];
+    let k = Math.min(4, view - this.snum);
+    for (let i = 4, j = 0; j < k; j++) {
+      let sat = { id: s[i++], ele: 1 * s[i++], azi: 1 * s[i++], snr: s[i++] };
+      if (sat.snr === "")
+        sat.snr = 0;
+      if (sat.snr >= this.snrLim) {
+        this.sats_used++;
+        print(sat.id, sat.snr);
+      }
+      this.sats[this.snum++] = sat;
+    }
+  },
+
+  old_msg: {},
+  msg: {},
+  tof: function(v) { let i = (1*v); return i.toFixed(0); },
+  fmtSys: function(sys) {
+    if (sys && sys.sent !== undefined && sys.d23 !== undefined)
+      return sys.sent + "." + sys.d23 + "D "+ this.tof(sys.pdop) + " " + this.tof(sys.vdop) + "\n";
+    else
+      return "(no data)\n";
+  },
+  display: function() {
+    if (ui.display != 1)
+      return;
+    let m = this.old_msg;
+    let msg = "" + this.tof(m.time) + "\n" + 
+        "q" + m.quality + " " + m.in_view + " " + m.hdop + "\n" +
+        "gp"+ this.fmtSys(m.gp) +
+        "bd" + this.fmtSys(m.bd)  +
+        "gl" + this.fmtSys(m.gl);
+    if (this.msg.finished != 1)
+      msg += "!";
+    g.reset().clear().setFont("Vector", 30)
+      .setColor(0, 0, 0)
+      .setFontAlign(-1, -1)
+      .drawString(msg, 0, 0);
+  },
+  parseRaw: function(msg, lost) {
+    if (lost) print("## data lost");
+    let s = msg.split(",");
+    let cmd = s[0].slice(3);
+    //print("cmd", cmd);
+    if (cmd === "GGA") {
+      this.old_msg = this.msg;
+      this.msg = {};
+      this.msg.time = s[1];
+      this.msg.quality = s[6];
+      this.msg.in_view = s[7];
+      this.msg.hdop = s[8];
+      this.msg.gp = {};
+      this.msg.bd = {};
+      this.msg.gl = {};
+      print("-----------------------------------------------");
+      print("GGA Time", s[1], "fix quality", s[4], "sats in view ", s[5]);
+      this.drawSats(this.sats);
+      if (this.sats_used < 5)
+        this.sky_start = getTime();
+      this.snum = 0;
+      this.sats = [];
+      this.sats_used = 0;
+      return;
+    }
+    if (cmd === "GLL") return; /* Position lat/lon */
+    if (cmd === "GSA") {
+      /*
+         $GNGSA,A,1,,,,,,,,,,,,,25.5,25.5,25.5,4*04
+        0      1 2             15   16   17   18     
+        */
+      /* Satelites used, fix type! INTERESTING */
+      let sys = s[18];
+      let add = {};
+      add.d23 = s[2];
+      add.pdop = s[15];
+      add.hdop = s[16];
+      add.vdop = s[17];
+      /* FIXME -- should really add to the sentence */
+      if (sys == 1) { this.msg.gp = add; }
+      else if (sys == 2) { this.msg.gl = add; }
+      else if (sys == 4) { this.msg.bd = add; }
+      else print("GSA Unknown system\n");
+
+      print(msg);
+      return;
+    }
+    if (s[0] === "$GPGSV") {
+      print("Have gps sentences", s[1], "/", s[2]);
+      this.parseSats(s);
+      this.msg.gp.sent = ""+s[2];
+      return;
+    }
+    if (s[0] === "$BDGSV") {
+      print("Have baidu sentences", s[1], "/", s[2]);
+      this.parseSats(s);
+      this.msg.bd.sent = ""+s[2];
+      return;
+    }
+    if (s[0] === "$GLGSV") {
+      print("Have glonass sentences", s[1], "/", s[2]);
+      this.parseSats(s);
+      this.msg.gl.sent = ""+s[2];
+      return;
+    }
+    if (cmd === "RMC") return; /* Repeat of position/speed/course */
+    if (cmd === "VTG") return; /* Speeds in knots/kph */
+    if (cmd === "ZDA") return; /* Time + timezone */
+    if (cmd === "TXT") {
+      this.msg.finished = 1;
+      return; /* Misc text? antena open */    
+    }
+
+    print(msg);
+  },
+  casic_cmd: function (cmd) {
+    var cs = 0;
+    for (var i=1;i<cmd.length;i++)
+      cs = cs ^ cmd.charCodeAt(i);
+    Serial1.println(cmd+"*"+cs.toString(16).toUpperCase().padStart(2, '0'));
+  },
+  sys: 3,
+  selectSpace: function () {
+    this.sys += 1;
+    if (this.sys == 4)
+      this.sys = 0;
+    let val = 7;
+    if (this.sys)
+      val = 1 << (this.sys - 1);
+    this.casic_cmd("$PCAS04,"+val);
+    ui.drawMsg("Sys "+val);
+  }
+};
+
+function start() {
+  Bangle.setGPSPower(1);
+  Bangle.on('GPS-raw', function(a, b) { sky.parseRaw(a, b); });
+  setTimeout(function() {
+    Bangle.removeAllListeners('GPS-raw');
+  }, 1000000);
+  setInterval(function() { sky.display(); }, 1000);
+}
+
+// CASIC_CMD("$PCAS06,0"); /* Query product information */
+setTimeout(() => sky.casic_cmd("$PCAS04,7"), 1000); /* Enable gps + beidou + glonass */
+setTimeout(() => sky.casic_cmd("$PCAS03,1,1,1,1,1,1,1,1"), 1000); /* Enable gps + beidou + glonass */
+
+//setTimeout(() => sky.casic_cmd("$PCAS10,2"), 1200); /* 2: cold start, 1 warm start, 0: hot start */
+
+ui.init();
+ui.topLeft = () => sky.selectSpace();
+Bangle.on("drag", (b) => ui.touchHandler(b));
+start();