Merge pull request #836 from kattni/cpb-cpx-drum-machine-update

Update drum machine for CPB

Author: kattni

Introducing_CircuitPlaygroundExpress/CircuitPlaygroundExpress_808_Drum_Machine.py

@@ -0,0 +1,54 @@
+# Circuit Playground 808 Drum machine
+import time
+import board
+import touchio
+import digitalio
+
+try:
+    from audiocore import WaveFile
+except ImportError:
+    from audioio import WaveFile
+
+try:
+    from audioio import AudioOut
+except ImportError:
+    try:
+        from audiopwmio import PWMAudioOut as AudioOut
+    except ImportError:
+        pass  # not always supported by every board!
+
+bpm = 120  # Beats per minute, change this to suit your tempo
+
+# Enable the speaker
+speaker_enable = digitalio.DigitalInOut(board.SPEAKER_ENABLE)
+speaker_enable.direction = digitalio.Direction.OUTPUT
+speaker_enable.value = True
+
+# Make the input capacitive touchpads
+capPins = (board.A1, board.A2, board.A3, board.A4, board.A5,
+           board.A6, board.TX)
+
+touchPad = []
+for i in range(7):
+    touchPad.append(touchio.TouchIn(capPins[i]))
+
+# The seven files assigned to the touchpads
+audiofiles = ["bd_tek.wav", "elec_hi_snare.wav", "elec_cymbal.wav",
+              "elec_blip2.wav", "bd_zome.wav", "bass_hit_c.wav",
+              "drum_cowbell.wav"]
+
+audio = AudioOut(board.SPEAKER)
+
+
+def play_file(filename):
+    print("playing file " + filename)
+    file = open(filename, "rb")
+    wave = WaveFile(file)
+    audio.play(wave)
+    time.sleep(bpm / 960)  # Sixteenth note delay
+
+
+while True:
+    for i in range(7):
+        if touchPad[i].value:
+            play_file(audiofiles[i])