110 lines
3.3 KiB
Python
110 lines
3.3 KiB
Python
# SPDX-FileCopyrightText: 2020 John Park for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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import time
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import math
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import board
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from digitalio import DigitalInOut, Direction, Pull
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import pwmio
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from adafruit_lsm6ds.lsm6ds33 import LSM6DS33
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from adafruit_lsm6ds import AccelRange, AccelHPF, Rate
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from adafruit_display_text import label
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import displayio
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import terminalio
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button_a = DigitalInOut(board.BUTTON_A)
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button_a.direction = Direction.INPUT
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button_a.pull = Pull.UP
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splash = displayio.Group()
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# bad egg
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BAD_EGG_FILENAME = "broken_egg.bmp"
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# CircuitPython 6 & 7 compatible
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begg_file = open(BAD_EGG_FILENAME, "rb")
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begg_bmp = displayio.OnDiskBitmap(begg_file)
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begg_sprite = displayio.TileGrid(
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begg_bmp,
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pixel_shader=getattr(begg_bmp, 'pixel_shader', displayio.ColorConverter())
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)
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# # CircuitPython 7+ compatible
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# begg_bmp = displayio.OnDiskBitmap(BAD_EGG_FILENAME)
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# begg_sprite = displayio.TileGrid(begg_bmp, pixel_shader=begg_bmp.pixel_shader)
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# good egg
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GOOD_EGG_FILENAME = "good_egg.bmp"
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# CircuitPython 6 & 7 compatible
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gegg_file = open(GOOD_EGG_FILENAME, "rb")
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gegg_bmp = displayio.OnDiskBitmap(gegg_file)
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gegg_sprite = displayio.TileGrid(
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gegg_bmp,
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pixel_shader=getattr(gegg_bmp, 'pixel_shader', displayio.ColorConverter())
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)
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# # CircuitPython 7+ compatible
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# gegg_bmp = displayio.OnDiskBitmap(GOOD_EGG_FILENAME)
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# gegg_sprite = displayio.TileGrid(gegg_bmp, pixel_shader=gegg_bmp.pixel_shader)
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# draw the bad egg!
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splash.append(begg_sprite)
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# draw the good egg on top
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splash.append(gegg_sprite)
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# Draw a label
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text_group = displayio.Group(scale=2, x=10, y=220)
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text = "Current & Max Acceleration"
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text_area = label.Label(terminalio.FONT, text=text, color=0x0000FF)
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text_group.append(text_area) # Subgroup for text scaling
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splash.append(text_group)
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# display everything so far
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board.DISPLAY.show(splash)
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# connect to the accelerometer
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i2c = board.I2C() # uses board.SCL and board.SDA
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# i2c = board.STEMMA_I2C() # For using the built-in STEMMA QT connector on a microcontroller
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sensor = LSM6DS33(i2c)
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# highest range for impacts!
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sensor.accelerometer_range = AccelRange.RANGE_16G
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# we'll read at about 1KHz
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sensor.accelerometer_rate = Rate.RATE_1_66K_HZ
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# Instead of raw accelerometer data, we'll read the *change* in acceleration (shock)
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sensor.high_pass_filter = AccelHPF.SLOPE
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sensor.high_pass_filter_enabled = True
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# and make a lil buzzer
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buzzer = pwmio.PWMOut(board.SPEAKER, variable_frequency=True)
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buzzer.frequency = 1000
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max_slope = 0
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egg_ok = True
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while True:
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# This isn't the acceleration but the SLOPE (change!) in acceleration
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x, y, z = sensor.acceleration
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# take the vector length by squaring, adding, taking root
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slope_g = math.sqrt(x*x + y*y + z*z) / 9.8 # take vector, convert to g
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# we'll track the max delta g
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if max_slope < slope_g:
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max_slope = slope_g
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print(slope_g)
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text_area.text = "Max Slope %0.1fg" % max_slope
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if max_slope >= 9 and egg_ok:
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gegg_sprite.x = 300
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time.sleep(0.1)
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egg_ok = False
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buzzer.duty_cycle = 2**15
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time.sleep(2)
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buzzer.duty_cycle = 0
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continue
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if button_a.value is False and egg_ok is False:
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print("Reset")
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time.sleep(0.1) # debounce
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max_slope = 0
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gegg_sprite.x = 0
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egg_ok = True
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