application: Visualize GPS fix state using the satellite icons.

[gps-watch.git] / src / application / main.rs

diff --git a/src/application/main.rs b/src/application/main.rs
index 74f199906853468fd5c6ac22fd41f25bc333480d..7eb180cbfa0bf42fcde3b8c9f45aceb9a822e4a0 100644 (file)
--- a/src/application/main.rs
+++ b/src/application/main.rs
@@ -128,12 +128,48 @@ pub unsafe extern "C" fn _start() -> ! {
 
     let mut gps = gps::Gps::new();
 
+    let mut gps_has_fix = false;
+    let mut gps_has_fix_ticks = 0;
+
     let mut heart_icon_timer = Timer::new(1000);
+    let mut gps_icon_timer = Timer::new(500);
 
     loop {
         let mut tap = gps::TimeAndPos::new();
+        let old_gps_has_fix = gps_has_fix;
 
         while gps.update(&mut tap) {
+            gps_has_fix = true;
+            gps_has_fix_ticks = systick::now();
+        }
+
+        // Did GPS fix information expire?
+        if gps_has_fix && systick::has_timeout_ms(gps_has_fix_ticks, 1500) {
+            gps_has_fix = false;
+        }
+
+        if gps_has_fix && !old_gps_has_fix {
+            display.show_icon(display::Icon::SatelliteBody);
+            display.show_icon(display::Icon::SatelliteWave1);
+            display.show_icon(display::Icon::SatelliteWave2);
+        } else if !gps_has_fix {
+            gps_icon_timer.update(|state| {
+                if state == 1 {
+                    display.show_icon(display::Icon::SatelliteWave1);
+                    2
+                } else if state == 2 {
+                    display.show_icon(display::Icon::SatelliteWave2);
+                    3
+                } else if state == 3 {
+                    display.hide_icon(display::Icon::SatelliteBody);
+                    display.hide_icon(display::Icon::SatelliteWave1);
+                    display.hide_icon(display::Icon::SatelliteWave2);
+                    0
+                } else {
+                    display.show_icon(display::Icon::SatelliteBody);
+                    1
+                }
+            });
         }
 
         heart_icon_timer.update(|state| {