Merge pull request #776 from ladyada/master

initial master sword code

Author: ladyada

Propmaker_Master_Sword/code.py

@@ -0,0 +1,192 @@
+"""
+Prop-Maker based Master Sword
+Adafruit invests time and resources providing this open source code.
+Please support Adafruit and open source hardware by purchasing
+products from Adafruit!
+Written by Kattni Rembor & Limor Fried for Adafruit Industries
+Copyright (c) 2019 Adafruit Industries
+Licensed under the MIT license.
+All text above must be included in any redistribution.
+"""
+
+import time
+import digitalio
+import audioio
+import busio
+import board
+import neopixel
+import adafruit_lis3dh
+
+# CUSTOMISE COLORS HERE:
+COLOR = (0, 120, 120)      # Default idle is light blue
+ALT_COLOR = (255, 255, 255)  # hit color is bright white
+
+# CUSTOMISE IDLE PULSE SPEED HERE: 0 is fast, above 0 slows down
+IDLE_PULSE_SPEED = 0.05  # Default is 0.1 seconds
+SWING_BLAST_SPEED = 0.01
+
+# CUSTOMISE BRIGHTNESS HERE: must be a number between 0 and 1
+IDLE_PULSE_BRIGHTNESS_MIN = 0.3  # Default minimum idle pulse brightness
+IDLE_PULSE_BRIGHTNESS_MAX = 0.6  # Default maximum idle pulse brightness
+
+# CUSTOMISE SENSITIVITY HERE: smaller numbers = more sensitive to motion
+HIT_THRESHOLD = 500
+SWING_THRESHOLD = 125
+
+# Set to the length in seconds of the "on.wav" file
+POWER_ON_SOUND_DURATION = 1.7
+
+NUM_PIXELS = 30  # Number of pixels used in project
+NEOPIXEL_PIN = board.D5
+POWER_PIN = board.D10
+
+enable = digitalio.DigitalInOut(POWER_PIN)
+enable.direction = digitalio.Direction.OUTPUT
+enable.value = False
+
+strip = neopixel.NeoPixel(NEOPIXEL_PIN, NUM_PIXELS, brightness=1, auto_write=False)
+strip.fill(0)  # NeoPixels off ASAP on startup
+strip.show()
+
+audio = audioio.AudioOut(board.A0)  # Speaker
+wave_file = None
+
+# Set up accelerometer on I2C bus, 4G range:
+i2c = busio.I2C(board.SCL, board.SDA)
+accel = adafruit_lis3dh.LIS3DH_I2C(i2c)
+accel.range = adafruit_lis3dh.RANGE_4_G
+
+COLOR_IDLE = COLOR # 'idle' color is the default
+COLOR_HIT = ALT_COLOR  # "hit" color is ALT_COLOR set above
+COLOR_SWING = ALT_COLOR  # "swing" color is ALT_COLOR set above
+
+
+def play_wav(name, loop=False):
+    """
+    Play a WAV file in the 'sounds' directory.
+    :param name: partial file name string, complete name will be built around
+                 this, e.g. passing 'foo' will play file 'sounds/foo.wav'.
+    :param loop: if True, sound will repeat indefinitely (until interrupted
+                 by another sound).
+    """
+    global wave_file  # pylint: disable=global-statement
+    print("playing", name)
+    if wave_file:
+        wave_file.close()
+    try:
+        wave_file = open('sounds/' + name + '.wav', 'rb')
+        wave = audioio.WaveFile(wave_file)
+        audio.play(wave, loop=loop)
+    except OSError:
+        pass # we'll just skip playing then
+
+
+def power_on(sound, duration):
+    """
+    Animate NeoPixels with accompanying sound effect for power on.
+    :param sound: sound name (similar format to play_wav() above)
+    :param duration: estimated duration of sound, in seconds (>0.0)
+    """
+    prev = 0
+    start_time = time.monotonic()  # Save audio start time
+    play_wav(sound)
+    while True:
+        elapsed = time.monotonic() - start_time  # Time spent playing sound
+        if elapsed > duration:  # Past sound duration?
+            break  # Stop animating
+        animation_time = elapsed / duration  # Animation time, 0.0 to 1.0
+        threshold = int(NUM_PIXELS * animation_time + 0.5)
+        num = threshold - prev  # Number of pixels to light on this pass
+        if num != 0:
+            strip[prev:threshold] = [ALT_COLOR] * num
+            strip.show()
+            prev = threshold
+
+
+def mix(color_1, color_2, weight_2):
+    """
+    Blend between two colors with a given ratio.
+    :param color_1:  first color, as an (r,g,b) tuple
+    :param color_2:  second color, as an (r,g,b) tuple
+    :param weight_2: Blend weight (ratio) of second color, 0.0 to 1.0
+    :return (r,g,b) tuple, blended color
+    """
+    if weight_2 < 0.0:
+        weight_2 = 0.0
+    elif weight_2 > 1.0:
+        weight_2 = 1.0
+    weight_1 = 1.0 - weight_2
+    return (int(color_1[0] * weight_1 + color_2[0] * weight_2),
+            int(color_1[1] * weight_1 + color_2[1] * weight_2),
+            int(color_1[2] * weight_1 + color_2[2] * weight_2))
+
+
+mode = 0  # Initial mode = OFF
+
+# Setup idle pulse
+idle_brightness = IDLE_PULSE_BRIGHTNESS_MIN  # current brightness of idle pulse
+idle_increment = 0.01  # Initial idle pulse direction
+
+# Main loop
+while True:
+
+    if mode == 0:  # If currently off...
+        enable.value = True
+        power_on('on', POWER_ON_SOUND_DURATION)  # Power up!
+        play_wav('idle', loop=True)  # Play idle sound now
+        mode = 1  # Idle mode
+
+        # Setup for idle pulse
+        idle_brightness = IDLE_PULSE_BRIGHTNESS_MIN
+        idle_increment = 0.01
+        strip.fill([int(c*idle_brightness) for c in COLOR])
+        strip.show()
+
+    elif mode >= 1:  # If not OFF mode...
+        x, y, z = accel.acceleration  # Read accelerometer
+        accel_total = x * x + z * z
+        # (Y axis isn't needed, due to the orientation that the Prop-Maker
+        # Wing is mounted.  Also, square root isn't needed, since we're
+        # comparing thresholds...use squared values instead.)
+        if accel_total > HIT_THRESHOLD:  # Large acceleration = HIT
+            TRIGGER_TIME = time.monotonic()  # Save initial time of hit
+            play_wav('hit')  # Start playing 'hit' sound
+            COLOR_ACTIVE = COLOR_HIT  # Set color to fade from
+            mode = 3  # HIT mode
+        elif mode == 1 and accel_total > SWING_THRESHOLD:  # Mild = SWING
+            TRIGGER_TIME = time.monotonic()  # Save initial time of swing
+            play_wav('swing')  # Start playing 'swing' sound
+            # make a larson scanner animation_time
+            strip_backup = strip[0:-1]
+            for p in range(-1, len(strip)):
+                for i in range (p-1, p+2): # shoot a 'ray' of 3 pixels
+                    if 0 <= i < len(strip):
+                        strip[i] = COLOR_SWING
+                strip.show()
+                time.sleep(SWING_BLAST_SPEED)
+                if 0 <= (p-1) < len(strip):
+                    strip[p-1] = strip_backup[p-1]  # restore previous color at the tail
+                strip.show()
+            while audio.playing:
+                pass # wait till we're done
+            mode = 2  # we'll go back to idle mode
+
+        elif mode == 1:
+            # Idle pulse
+            idle_brightness += idle_increment  # Pulse up
+            if idle_brightness > IDLE_PULSE_BRIGHTNESS_MAX or \
+               idle_brightness < IDLE_PULSE_BRIGHTNESS_MIN:  # Then...
+                idle_increment *= -1  # Pulse direction flip
+            strip.fill([int(c*idle_brightness) for c in COLOR_IDLE])
+            strip.show()
+            time.sleep(IDLE_PULSE_SPEED)  # Idle pulse speed set above
+        elif mode > 1:  # If in SWING or HIT mode...
+            if audio.playing:  # And sound currently playing...
+                blend = time.monotonic() - TRIGGER_TIME  # Time since triggered
+                if mode == 2:  # If SWING,
+                    blend = abs(0.5 - blend) * 2.0  # ramp up, down
+                strip.fill(mix(COLOR_ACTIVE, COLOR, blend))  # Fade from hit/swing to base color
+                strip.show()
+            else:  # No sound now, but still SWING or HIT modes
+                play_wav('idle', loop=True)  # Resume idle sound
+                mode = 1  # Return to idle mode