Add note function

Author: maxpromer

ports/esp32/boards/KidBright32/modules/buzzer.py

@@ -3,17 +3,68 @@
 from machine import Pin, PWM
 from time import sleep
 
-buzzer = PWM(Pin(13), freq=2000, duty=0)
+note_map = {
+    "C4": 261,
+	"C#4": 277,
+	"D4": 293,
+	"Eb4": 311,
+	"E4": 329,
+	"F4": 349,
+	"F#4": 369,
+	"G4": 391,
+	"G#4": 415,
+	"A4": 440,
+	"Bb4": 466,
+	"B4": 493,
+	"C5": 523,
+	"C#5": 554,
+	"D5": 587,
+	"Eb5": 622,
+	"E5": 659,
+	"F5": 698,
+	"F#5": 740,
+	"G5": 784,
+	"G#5": 831,
+	"A5": 880,
+	"Bb5": 932,
+	"B5": 988,
+	"C6": 1046,
+	"C#6": 1109,
+	"D6": 1175,
+	"Eb6": 1244,
+	"E6": 1318, 
+	"F6": 1396,
+	"F#6": 1480,
+	"G6": 1568,
+	"G#6": 1661,
+	"A6": 1760,
+	"Bb6": 1865,
+	"B6": 1976,
+	"C7": 2093,
+    "SIL": 0
+}
 
-def tone(freq=2093, duration=0.5, duty=50):
-    buzzer.freq(freq)
-    buzzer.duty(duty)
+__buzzer = PWM(Pin(13), freq=2000, duty=0)
+volume = 50
+bpm = 120
+
+def tone(freq=2093, duration=0.5):
+    __buzzer.freq(int(freq))
+    __buzzer.duty(int(volume / 100 * 512))
     sleep(duration)
-    buzzer.duty(0)
+    __buzzer.duty(0)
 
-def on(freq=2000, duty=50):
-    buzzer.freq(freq)
-    buzzer.duty(duty)
+def on(freq=2000):
+    __buzzer.freq(int(freq))
+    __buzzer.duty(int(volume / 100 * 512))
 
 def off():
-    buzzer.duty(0)
+    __buzzer.duty(0)
+
+def note(notes, duration=4):
+    quarter_delay = (60 * 1000) / bpm
+    delay = quarter_delay * duration
+    delay = delay / 1000 # mS -> S
+    for note in notes.split(" "):
+        tone(note_map[note], delay)
+