spacer: better docs, compute statistics per-system

apps/spacer/README.md

@@ -4,5 +4,17 @@ 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.
+switch navigation systems. Clicks in bottom half of screen switch info
+pages.
+
+GNSS acquisition has few phases, and this software is assuming you are
+not doing a cold start. GNSS fix needs 4 or 5 satellites with
+reasonable signal strength, and then holding the same place for 40 or
+so seconds.
+
+nil -- no satellites visible
+
+S1..S4 -- not enough satellites being decoded (5 needed)
+
+XXdB -- have enough satellites, but signal is not strong enough
 

apps/spacer/spacer.app.js

@@ -217,10 +217,37 @@ let skys = {
   },
 };
 
+function deepCopy(obj) {
+  if (obj === null || typeof obj !== "object") {
+    return obj; // Return primitive values as-is
+  }
+
+  if (Array.isArray(obj)) {
+    return obj.map(deepCopy); // Handle arrays recursively
+  }
+
+  const copy = {};
+  for (const key in obj) {
+    if (obj.hasOwnProperty(key)) {
+      copy[key] = deepCopy(obj[key]); // Recursively copy properties
+    }
+  }
+  return copy;
+}
+
 let sky = {
   this_usable: 0,
   debug: 0,
   all: skys,  /* Sattelites from all systems */
+  split: 1,
+
+  init: function () {
+    if (this.split) {
+      this.s_gp = deepCopy(skys);
+      this.s_gl = deepCopy(skys);
+      this.s_bd = deepCopy(skys);
+    }
+  },
 
   drawGrid: function() {
     g.setColor(0,0,0);
@@ -272,8 +299,12 @@ let sky = {
   tof: function(v, n) { let i = (1*v); return i.toFixed(n); },
   tof0: function(v) { return this.tof(v, 0); },
   tof1: function(v) { return this.tof(v, 1); },
-  fmtSys: function(sys) {
-    return sys.sent + "." + sys.d23 + "D "+ this.tof(sys.pdop) + " " + this.tof0(sys.vdop) + "\n";
+  fmtSys: function(sys, sats) {
+    let r = sys.sent + " ";
+    // r+= sys.d23 + "D ";
+    if (sats)
+      r +=  sats.sats_used + "/" + sats.snum;
+    return r + "\n";
   },
   drawRace: function() {
     let m = this.old_msg;
@@ -281,9 +312,9 @@ let sky = {
         "q" + m.quality + " S" + m.in_view + " h" + this.tof0(m.hdop) + "m\n" +
         /*        "v" + this.tof0(m.vdop) + "m " + "p" + this.tof0(m.pdop) + "m\n" +  */
         this.all.summary() + "\n" +
-        "gp"+ this.fmtSys(m.gp) +
-        "bd" + this.fmtSys(m.bd)  +
-        "gl" + this.fmtSys(m.gl);
+        "gp"+ this.fmtSys(m.gp, this.s_gp) +
+        "bd" + this.fmtSys(m.bd, this.s_bd)  +
+        "gl" + this.fmtSys(m.gl, this.s_gl);
     if (this.msg.finished != 1)
       msg += "!";
     g.reset().clear().setFont("Vector", 30)
@@ -371,6 +402,8 @@ let sky = {
       if (this.debug > 0)
         print("Have gps sentences", s[1], "/", s[2]);
       this.all.parseSats(s);
+      if (this.split)      
+        this.s_gp.parseSats(s);
       this.msg.gp.sent = ""+s[2];
       return;
     }
@@ -378,6 +411,8 @@ let sky = {
       if (this.debug > 0)
         print("Have baidu sentences", s[1], "/", s[2]);
       this.all.parseSats(s);
+      if (this.split)      
+        this.s_bd.parseSats(s);
       this.msg.bd.sent = ""+s[2];
       return;
     }
@@ -385,6 +420,8 @@ let sky = {
       if (this.debug > 0)
         print("Have glonass sentences", s[1], "/", s[2]);
       this.all.parseSats(s);
+      if (this.split)
+        this.s_gl.parseSats(s);
       this.msg.gl.sent = ""+s[2];
       return;
     }
@@ -442,4 +479,5 @@ ui.init();
 ui.topLeft = () => sky.selectSpace();
 Bangle.on("drag", (b) => ui.touchHandler(b));
 sky.onMessageEnd = onMessage;
+sky.init();
 start();