Merge pull request #1052 from jedgarpark/clue-egg-drop

first commit

Author: jedgarpark

CLUE_Egg_Drop/broken_egg.bmp

@@ -0,0 +1,83 @@
+import time
+import math
+import board
+from digitalio import DigitalInOut, Direction, Pull
+import pulseio
+from adafruit_lsm6ds import LSM6DS33, AccelRange, AccelHPF, Rate
+from adafruit_display_text import label
+import displayio
+import terminalio
+
+button_a = DigitalInOut(board.BUTTON_A)
+button_a.direction = Direction.INPUT
+button_a.pull = Pull.UP
+
+splash = displayio.Group(max_size=3)
+
+# draw the bad egg!
+begg_file = open("broken_egg.bmp", "rb")
+begg_bmp = displayio.OnDiskBitmap(begg_file)
+begg_sprite = displayio.TileGrid(begg_bmp,
+                                 pixel_shader=displayio.ColorConverter())
+splash.append(begg_sprite)
+
+# draw the good egg on top
+gegg_file = open("good_egg.bmp", "rb")
+gegg_bmp = displayio.OnDiskBitmap(gegg_file)
+gegg_sprite = displayio.TileGrid(gegg_bmp,
+                                 pixel_shader=displayio.ColorConverter())
+splash.append(gegg_sprite)
+
+# Draw a label
+text_group = displayio.Group(max_size=1, scale=2, x=10, y=220)
+text = "Current & Max Acceleration"
+text_area = label.Label(terminalio.FONT, text=text, color=0x0000FF)
+text_group.append(text_area) # Subgroup for text scaling
+splash.append(text_group)
+
+# display everything so far
+board.DISPLAY.show(splash)
+
+# connect to the accelerometer
+sensor = LSM6DS33(board.I2C())
+# highest range for impacts!
+sensor.accelerometer_range = AccelRange.RANGE_16G
+# we'll read at about 1KHz
+sensor.accelerometer_rate = Rate.RATE_1_66K_HZ
+# Instead of raw accelerometer data, we'll read the *change* in acceleration (shock)
+sensor.high_pass_filter = AccelHPF.SLOPE
+sensor.high_pass_filter_enabled = True
+
+# and make a lil buzzer
+buzzer = pulseio.PWMOut(board.SPEAKER, variable_frequency=True)
+buzzer.frequency = 1000
+
+max_slope = 0
+egg_ok = True
+while True:
+    # This isn't the acceleration but the SLOPE (change!) in acceleration
+    x, y, z = sensor.acceleration
+    # take the vector length by squaring, adding, taking root
+    slope_g = math.sqrt(x*x + y*y + z*z) / 9.8  # take vector, convert to g
+    # we'll track the max delta g
+
+    if max_slope < slope_g:
+        max_slope = slope_g
+        print(slope_g)
+        text_area.text = "Max Slope %0.1fg" % (max_slope)
+        if max_slope >= 9 and egg_ok:
+            gegg_sprite.x = 300
+            time.sleep(0.1)
+            egg_ok = False
+            buzzer.duty_cycle = 2**15
+            time.sleep(2)
+            buzzer.duty_cycle = 0
+            continue
+
+
+    if button_a.value is False and egg_ok is False:
+        print("Reset")
+        time.sleep(0.1)  # debounce
+        max_slope = 0
+        gegg_sprite.x = 0
+        egg_ok = True