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, 23 insertions, 0 deletions

diff --git a/wasp/boards/simulator/watch.py b/wasp/boards/simulator/watch.py
index 178b1eb..b9de73d 100644
--- a/wasp/boards/simulator/watch.py
+++ b/wasp/boards/simulator/watch.py
@@ -22,6 +22,28 @@ from drivers.cst816s import CST816S
 from drivers.st7789 import ST7789_SPI
 from drivers.vibrator import Vibrator
 
+class Accelerometer:
+    """Simulated accelerometer.
+
+    Accelerometers such as BMA421 are complex and most of the driver
+    is written in C. For that reason we simulate the accelerometer
+    rather than emulate (by comparison we emulate the ST7789).
+    """
+    def reset(self):
+        self._steps = 3
+
+    @property
+    def steps(self):
+        """Report the number of steps counted."""
+        if self._steps < 10000:
+            self._steps = int(self._steps * 1.34)
+        else:
+            self._steps += 1
+        return self._steps
+
+    @steps.setter
+    def steps(self, value):
+        self.reset()
 
 class Backlight(object):
     def __init__(self, level=1):
@@ -105,6 +127,7 @@ display = ST7789_SPI(240, 240, spi,
         res=Pin("DISP_RST", Pin.OUT, quiet=True))
 drawable = draw565.Draw565(display)
 
+accel = Accelerometer()
 battery = Battery()
 button = Pin('BUTTON', Pin.IN, quiet=True)
 rtc = RTC()