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>peter
Daniel Thompson
3 years ago
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dea2ba8d65
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ccaf12750b
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After Width: | Height: | Size: 388 B |
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# SPDX-License-Identifier: LGPL-3.0-or-later
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# Copyright (C) 2020 Daniel Thompson
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import wasp
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import fonts
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import icons
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import time
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import watch
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# 2-bit RLE, generated from res/feet.png, 240 bytes
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feet = (
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b'\x02'
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b'00'
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b'\x13\xc1-\xc4+\xc6*\xc6*\xc6&\xc3\x01\xc6\t\xc2'
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b'\x1b\xc3\x02\xc5\x08\xc4\x1a\xc4\x01\xc5\x08\xc5\x19\xc4\x02\xc3'
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b'\x08\xc6\x17\xc1\x02\xc3\x02\xc3\x08\xc6\x16\xc3\x02\xc1\x0e\xc6'
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b'\x01\xc3\x12\xc3\x11\xc6\x01\xc3\x13\xc2\x05\xc2\n\xc5\x02\xc3'
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b'\x10\xc2\x01\xc2\x02\xc6\n\xc4\x01\xc4\x10\xc2\x04\xc7\x0b\xc1'
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b'\x03\xc3\x11\xc3\x02\xc8\x10\xc2\x01\xc3\r\xc2\x02\xc9\x13\xc3'
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b'\x0b\xc1\x05\xc9\x0c\xc2\x05\xc3\x0b\xc2\x03\xc9\x0c\xc5\x03\xc2'
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b'\x0c\xc2\x02\xca\x0c\xc6\x05\xc2\t\xc2\x02\xca\x0c\xc7\x03\xc3'
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b'\r\xca\x0c\xc8\x02\xc3\x0c\xca\r\xc9\x02\xc1\r\xca\r\xc9'
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b'\x04\xc2\n\xca\x0e\xc9\x02\xc3\n\xca\x0e\xc9\x02\xc2\x0b\xca'
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b'\x0e\xca\x0e\xca\x0e\xca\x0f\xc9\x0e\xca\x0f\xca\r\xca\x0f\xca'
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b'\r\xca\x10\xcb\x0b\xca\x10\xcc\n\xca\x10\xcd\t\xca\x11\xcc'
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b'\x08\xca\x12\xcc\x07\xcb\x13\xcb\x06\xcb\x14\xcb\x05\xcc\x15\xca'
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b'\x04\xcc\x16\xc9\x05\xcc\x17\xc7\x05\xcd\x17\xc7\x05\xcc\x1a\xc4'
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b"\x07\xcb%\xca&\xca'\xc8)\xc6+\xc4\x0e"
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)
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class StepCounterApp():
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NAME = 'Steps'
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ICON = icons.app
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def __init__(self):
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watch.accel.reset()
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self._meter = wasp.widgets.BatteryMeter()
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self._count = 0
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def foreground(self):
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"""Activate the application."""
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self._last_clock = ( -1, -1, -1, -1, -1, -1 )
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self._draw()
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wasp.system.request_tick(1000)
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def tick(self, ticks):
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self._count += 686;
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self._update()
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def _draw(self):
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"""Draw the display from scratch."""
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draw = wasp.watch.drawable
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draw.fill()
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draw.blit(feet, 12, 132-24)
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self._last_count = -1
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self._update()
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self._meter.draw()
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def _update(self):
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draw = wasp.watch.drawable
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# Lazy update of the clock and battery meter
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now = wasp.watch.rtc.get_localtime()
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if now[4] != self._last_clock[4]:
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t1 = '{:02}:{:02}'.format(now[3], now[4])
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draw.set_font(fonts.sans24)
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draw.string(t1, 48, 16, 240-96)
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self._last_clock = now
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self._meter.update()
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if now[2] != self._last_clock[2]:
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watch.accel.steps = 0
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draw.fill(60, 132-18, 180, 36)
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count = watch.accel.steps
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t = str(count)
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w = fonts.width(fonts.sans36, t)
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draw.set_font(fonts.sans36)
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draw.string(t, 228-w, 132-18)
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# SPDX-License-Identifier: LGPL-3.0-or-later
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# Copyright (C) 2020 Daniel Thompson
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"""Bosch BMA421 accelerometer driver
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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"""
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import bma42x
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import time
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class BMA421:
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"""BMA421 driver
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.. automethod:: __init__
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"""
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def __init__(self, i2c):
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"""Configure the driver.
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:param machine.I2C i2c: I2C bus used to access the sensor.
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"""
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self._dev = bma42x.BMA42X(i2c)
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def reset(self):
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"""Reset and reinitialize the sensor."""
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dev = self._dev
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# Init, reset, wait for reset, enable I2C watchdog
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dev.init()
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dev.set_command_register(0xb6)
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time.sleep(0.20)
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dev.set_reg(bma42x.NV_CONFIG_ADDR, 6);
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# Configure the sensor for basic step counting
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dev.write_config_file()
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dev.set_accel_enable(True)
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dev.set_accel_config(odr=bma42x.OUTPUT_DATA_RATE_100HZ,
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range=bma42x.ACCEL_RANGE_2G,
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bandwidth=bma42x.ACCEL_NORMAL_AVG4,
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perf_mode=bma42x.CIC_AVG_MODE)
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dev.feature_enable(bma42x.STEP_CNTR, True)
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@property
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def steps(self):
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"""Report the number of steps counted."""
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return self._dev.step_counter_output()
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@steps.setter
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def steps(self, value):
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if value != 0:
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raise ValueError()
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# TODO: There is a more efficient way to reset the step counter
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# but I haven't looked it up yet!
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self.reset()
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@ -0,0 +1 @@
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Subproject commit 55c16a0d0407b1f15efe0d2118a4cca13102fe7e
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