Audio: add photon sword example.

examples/tiny_fx/examples/audio/photon_sword.py

@@ -0,0 +1,56 @@
+import time
+import math
+import random
+from tiny_fx import TinyFX
+from audio import WavPlayer
+from machine import Pin, I2C
+from breakout_msa301 import BreakoutMSA301
+
+"""
+Absolutely definitely not a l&%t s&^@*r.
+
+Don't forget to copy the `photon_sword` directory.
+
+Grab yourself an MSA301 and attach it to the Qw/St connector.
+
+Press boot to power up, swing to make do sounds! SWOOSH SWOOOOSH!!!
+"""
+
+TRIGGER_DELTA = 1.0
+
+tiny = TinyFX()
+wav = WavPlayer(0, tiny.I2S_BCLK, tiny.I2S_LRCLK, tiny.I2S_DATA, tiny.AMP_EN_PIN, root="/photon_sword")
+
+i2c = I2C(0, sda=tiny.I2C_SDA_PIN, scl=tiny.I2C_SCL_PIN)
+
+msa = BreakoutMSA301(i2c)
+
+msa.enable_interrupts(BreakoutMSA301.FREEFALL | BreakoutMSA301.ORIENTATION)
+
+last_axes = None
+
+try:
+    while not tiny.boot_pressed():
+        pass
+    wav.play_wav("ps-start.wav")
+    while wav.is_playing():
+        pass
+    while True:
+        if not wav.is_playing():
+            wav.play_wav("ps-idle.wav", True)
+        this_axes = msa.get_x_axis(), msa.get_y_axis(), msa.get_z_axis()
+        if last_axes is not None:
+            deltas = [abs(this_axes[n] - last_axes[n]) for n in range(3)]
+            delta = max(deltas)
+            if delta > TRIGGER_DELTA:
+                swing = deltas.index(delta) + 1
+                file = f"ps-swing{swing}.wav"
+                wav.play_wav(file)
+                print(file)
+        last_axes = this_axes
+        time.sleep(0.05)
+
+finally:
+    wav.deinit()
+
+