68 lines
2.0 KiB
Python
68 lines
2.0 KiB
Python
|
# buzzer.py
|
||
|
|
from machine import Pin, PWM
|
||
|
|
import time
|
||
|
|
|
||
|
|
# === Global note frequencies (A4 = 440 Hz tuning) ===
|
||
|
|
NOTES = {
|
||
|
|
"C3": 131, "D3": 147, "E3": 165, "F3": 175, "G3": 196, "A3": 220, "B3": 247,
|
||
|
|
"C4": 262, "D4": 294, "E4": 330, "F4": 349, "G4": 392, "A4": 440, "B4": 494,
|
||
|
|
"C5": 523, "D#5": 622, "D5": 587, "E5": 659, "F5": 698, "G5": 784, "G#5": 831, "A5": 880, "B5": 988,
|
||
|
|
"C6": 1047, "D6": 1175, "E6": 1319, "F6": 1397, "G6": 1568, "A6": 1760, "B6": 1976,
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
REST = 0 # constant for silence
|
||
|
|
|
||
|
|
class Buzzer:
|
||
|
|
def __init__(self, pin=29):
|
||
|
|
self.pwm = PWM(Pin(pin))
|
||
|
|
self.pwm.duty_u16(0)
|
||
|
|
|
||
|
|
def _start(self, freq, duty=32768):
|
||
|
|
self.pwm.freq(freq)
|
||
|
|
self.pwm.duty_u16(duty)
|
||
|
|
|
||
|
|
def _stop(self):
|
||
|
|
self.pwm.duty_u16(0)
|
||
|
|
|
||
|
|
def tone(self, freq, duration=200, duty=32768):
|
||
|
|
"""Play a single tone or rest."""
|
||
|
|
if freq == REST:
|
||
|
|
self._stop()
|
||
|
|
time.sleep_ms(duration)
|
||
|
|
else:
|
||
|
|
self._start(freq, duty)
|
||
|
|
time.sleep_ms(duration)
|
||
|
|
self._stop()
|
||
|
|
|
||
|
|
def sequence(self, tones):
|
||
|
|
"""
|
||
|
|
tones: list of (note, duration) where note can be a string ("E4") or int frequency.
|
||
|
|
"""
|
||
|
|
for note, dur in tones:
|
||
|
|
if note == REST:
|
||
|
|
self.tone(REST, dur)
|
||
|
|
elif isinstance(note, str):
|
||
|
|
self.tone(NOTES[note], dur)
|
||
|
|
else:
|
||
|
|
self.tone(note, dur)
|
||
|
|
time.sleep_ms(30)
|
||
|
|
|
||
|
|
def mario_theme(self):
|
||
|
|
notes = [
|
||
|
|
("E4",125), ("E4",125), (REST,125), ("E4",125),
|
||
|
|
(REST,125), ("C4",125), ("E4",125), (REST,125),
|
||
|
|
("G4",125), (REST,375), ("G3",125),
|
||
|
|
(REST,375), ("C4",125), (REST,250), ("G3",125),
|
||
|
|
(REST,250), ("E4",125), (REST,250), ("A5",125),
|
||
|
|
(REST,125), ("B5",125), (REST,125), ("A5",125),
|
||
|
|
("G5",125), ("E5",125), ("G5",125), ("A5",125),
|
||
|
|
]
|
||
|
|
self.sequence(notes)
|
||
|
|
|
||
|
|
|
||
|
|
def wake_up(self):
|
||
|
|
notes = [("E4", 125), ("C4", 125), ("A5", 125)]
|
||
|
|
self.sequence(notes)
|
||
|
|
|