wasp: apps: Step counter application

Currently there's no fancy algorithms to estimate stride length. Just
pure simple step counting directly from the hardware's "intelligence
engine".

Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>

1 files changed, 82 insertions, 0 deletions

diff --git a/wasp/apps/steps.py b/wasp/apps/steps.py
new file mode 100644
index 0000000..d114eff
--- /dev/null
+++ b/wasp/apps/steps.py
@@ -0,0 +1,82 @@
+# SPDX-License-Identifier: LGPL-3.0-or-later
+# Copyright (C) 2020 Daniel Thompson
+
+import wasp
+
+import fonts
+import icons
+import time
+import watch
+
+# 2-bit RLE, generated from res/feet.png, 240 bytes
+feet = (
+    b'\x02'
+    b'00'
+    b'\x13\xc1-\xc4+\xc6*\xc6*\xc6&\xc3\x01\xc6\t\xc2'
+    b'\x1b\xc3\x02\xc5\x08\xc4\x1a\xc4\x01\xc5\x08\xc5\x19\xc4\x02\xc3'
+    b'\x08\xc6\x17\xc1\x02\xc3\x02\xc3\x08\xc6\x16\xc3\x02\xc1\x0e\xc6'
+    b'\x01\xc3\x12\xc3\x11\xc6\x01\xc3\x13\xc2\x05\xc2\n\xc5\x02\xc3'
+    b'\x10\xc2\x01\xc2\x02\xc6\n\xc4\x01\xc4\x10\xc2\x04\xc7\x0b\xc1'
+    b'\x03\xc3\x11\xc3\x02\xc8\x10\xc2\x01\xc3\r\xc2\x02\xc9\x13\xc3'
+    b'\x0b\xc1\x05\xc9\x0c\xc2\x05\xc3\x0b\xc2\x03\xc9\x0c\xc5\x03\xc2'
+    b'\x0c\xc2\x02\xca\x0c\xc6\x05\xc2\t\xc2\x02\xca\x0c\xc7\x03\xc3'
+    b'\r\xca\x0c\xc8\x02\xc3\x0c\xca\r\xc9\x02\xc1\r\xca\r\xc9'
+    b'\x04\xc2\n\xca\x0e\xc9\x02\xc3\n\xca\x0e\xc9\x02\xc2\x0b\xca'
+    b'\x0e\xca\x0e\xca\x0e\xca\x0f\xc9\x0e\xca\x0f\xca\r\xca\x0f\xca'
+    b'\r\xca\x10\xcb\x0b\xca\x10\xcc\n\xca\x10\xcd\t\xca\x11\xcc'
+    b'\x08\xca\x12\xcc\x07\xcb\x13\xcb\x06\xcb\x14\xcb\x05\xcc\x15\xca'
+    b'\x04\xcc\x16\xc9\x05\xcc\x17\xc7\x05\xcd\x17\xc7\x05\xcc\x1a\xc4'
+    b"\x07\xcb%\xca&\xca'\xc8)\xc6+\xc4\x0e"
+)
+
+class StepCounterApp():
+    NAME = 'Steps'
+    ICON = icons.app
+
+    def __init__(self):
+        watch.accel.reset()
+        self._meter = wasp.widgets.BatteryMeter()
+        self._count = 0
+
+    def foreground(self):
+        """Activate the application."""
+        self._last_clock = ( -1, -1, -1, -1, -1, -1 )
+
+        self._draw()
+        wasp.system.request_tick(1000)
+
+    def tick(self, ticks):
+        self._count += 686;
+        self._update()
+
+    def _draw(self):
+        """Draw the display from scratch."""
+        draw = wasp.watch.drawable
+        draw.fill()
+        draw.blit(feet, 12, 132-24)
+
+        self._last_count = -1
+        self._update()
+        self._meter.draw()
+
+    def _update(self):
+        draw = wasp.watch.drawable
+
+        # Lazy update of the clock and battery meter
+        now = wasp.watch.rtc.get_localtime()
+        if now[4] != self._last_clock[4]:
+            t1 = '{:02}:{:02}'.format(now[3], now[4])
+            draw.set_font(fonts.sans24)
+            draw.string(t1, 48, 16, 240-96)
+            self._last_clock = now
+            self._meter.update()
+
+            if now[2] != self._last_clock[2]:
+                watch.accel.steps = 0
+                draw.fill(60, 132-18, 180, 36)
+
+        count = watch.accel.steps
+        t = str(count)
+        w = fonts.width(fonts.sans36, t)
+        draw.set_font(fonts.sans36)
+        draw.string(t, 228-w, 132-18)