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pimoroni-pico/micropython/examples/stellar_unicorn/feature_test_with_audio.py

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import gc
import time
import math
from machine import Timer
from stellar import StellarUnicorn, Channel
from picographics import PicoGraphics, DISPLAY_STELLAR_UNICORN as DISPLAY
'''
Displays some text, gradients and colours and demonstrates button use.
Also demonstrates some of the audio / synth features.
- Button A plays a synth tune
- Button B plays a solo channel of the synth tune
- Button C plays a sinewave (it's frequency can be adjusted with VOL + and -)
- Button D plays a second sinewave (it's frequency can be adjusted with LUX + and -)
- Sleep button stops the sounds
'''
gc.collect()
su = StellarUnicorn()
graphics = PicoGraphics(DISPLAY)
width = StellarUnicorn.WIDTH
height = StellarUnicorn.HEIGHT
SONG_LENGTH = 384
HAT = 20000
BASS = 500
SNARE = 6000
SUB = 50
melody_notes = (
147, 0, 0, 0, 0, 0, 0, 0, 175, 0, 196, 0, 220, 0, 262, 0, 247, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 175, 0, 0, 0, 0, 0, 0, 0, 175, 0, 196, 0, 220, 0, 262, 0, 330, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 349, 0, 0, 0, 0, 0, 0, 0, 349, 0, 330, 0, 294, 0, 220, 0, 262, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 247, 0, 0, 0, 0, 0, 0, 0, 247, 0, 220, 0, 196, 0, 147, 0, 175, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0,
147, 0, 0, 0, 0, 0, 0, 0, 175, 0, 196, 0, 220, 0, 262, 0, 247, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 175, 0, 0, 0, 0, 0, 0, 0, 175, 0, 196, 0, 220, 0, 262, 0, 330, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 349, 0, 0, 0, 0, 0, 0, 0, 349, 0, 330, 0, 294, 0, 220, 0, 262, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 247, 0, 0, 0, 0, 0, 0, 0, 247, 0, 220, 0, 196, 0, 147, 0, 175, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0,
147, 0, 0, 0, 0, 0, 0, 0, 175, 0, 196, 0, 220, 0, 262, 0, 247, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 175, 0, 0, 0, 0, 0, 0, 0, 175, 0, 196, 0, 220, 0, 262, 0, 330, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 349, 0, 0, 0, 0, 0, 0, 0, 349, 0, 330, 0, 294, 0, 220, 0, 262, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 247, 0, 0, 0, 0, 0, 0, 0, 247, 0, 262, 0, 294, 0, 392, 0, 440, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
rhythm_notes = (
294, 0, 440, 0, 587, 0, 440, 0, 294, 0, 440, 0, 587, 0, 440, 0, 294, 0, 440, 0, 587, 0, 440, 0, 294, 0, 440, 0, 587, 0, 440, 0, 294, 0, 440, 0, 587, 0, 440, 0, 294, 0, 440, 0, 587, 0, 440, 0, 392, 0, 523, 0, 659, 0, 523, 0, 392, 0, 523, 0, 659, 0, 523, 0, 698, 0, 587, 0, 440, 0, 587, 0, 698, 0, 587, 0, 440, 0, 587, 0, 523, 0, 440, 0, 330, 0, 440, 0, 523, 0, 440, 0, 330, 0, 440, 0, 349, 0, 294, 0, 220, 0, 294, 0, 349, 0, 294, 0, 220, 0, 294, 0, 262, 0, 247, 0, 220, 0, 175, 0, 165, 0, 147, 0, 131, 0, 98, 0,
294, 0, 440, 0, 587, 0, 440, 0, 294, 0, 440, 0, 587, 0, 440, 0, 294, 0, 440, 0, 587, 0, 440, 0, 294, 0, 440, 0, 587, 0, 440, 0, 294, 0, 440, 0, 587, 0, 440, 0, 294, 0, 440, 0, 587, 0, 440, 0, 392, 0, 523, 0, 659, 0, 523, 0, 392, 0, 523, 0, 659, 0, 523, 0, 698, 0, 587, 0, 440, 0, 587, 0, 698, 0, 587, 0, 440, 0, 587, 0, 523, 0, 440, 0, 330, 0, 440, 0, 523, 0, 440, 0, 330, 0, 440, 0, 349, 0, 294, 0, 220, 0, 294, 0, 349, 0, 294, 0, 220, 0, 294, 0, 262, 0, 247, 0, 220, 0, 175, 0, 165, 0, 147, 0, 131, 0, 98, 0,
294, 0, 440, 0, 587, 0, 440, 0, 294, 0, 440, 0, 587, 0, 440, 0, 294, 0, 440, 0, 587, 0, 440, 0, 294, 0, 440, 0, 587, 0, 440, 0, 294, 0, 440, 0, 587, 0, 440, 0, 294, 0, 440, 0, 587, 0, 440, 0, 392, 0, 523, 0, 659, 0, 523, 0, 392, 0, 523, 0, 659, 0, 523, 0, 698, 0, 587, 0, 440, 0, 587, 0, 698, 0, 587, 0, 440, 0, 587, 0, 523, 0, 440, 0, 330, 0, 440, 0, 523, 0, 440, 0, 330, 0, 440, 0, 349, 0, 294, 0, 220, 0, 294, 0, 349, 0, 294, 0, 220, 0, 294, 0, 262, 0, 247, 0, 220, 0, 175, 0, 165, 0, 147, 0, 131, 0, 98, 0)
drum_beats = (
BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, BASS, -1, BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, 0, 0, BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, BASS, -1, BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, 0, 0, BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, BASS, -1, BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, 0, 0, BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, BASS, -1, BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, 0, 0,
BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, BASS, -1, BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, 0, 0, BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, BASS, -1, BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, 0, 0, BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, BASS, -1, BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, 0, 0, BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, BASS, -1, BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, 0, 0,
BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, BASS, -1, BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, 0, 0, BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, BASS, -1, BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, 0, 0, BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, BASS, -1, BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, 0, 0, BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, BASS, -1, BASS, -1, 0, 0, 0, 0, 0, 0, SNARE, 0, -1, 0, 0, 0, 0, 0)
hi_hat = (
HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1,
HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1,
HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1, HAT, -1)
bass_notes = (
SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, SUB, -1, SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, SUB, -1, SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, SUB, -1, SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, SUB, -1, SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0,
SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, SUB, -1, SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, SUB, -1, SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, SUB, -1, SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, SUB, -1, SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0,
SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, SUB, -1, SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, SUB, -1, SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, SUB, -1, SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, SUB, -1, SUB, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0)
notes = [melody_notes, rhythm_notes, drum_beats, hi_hat, bass_notes]
channels = [su.synth_channel(i) for i in range(len(notes) + 1)] # Extra channel for tones
# Configure the synth to play our notes
channels[0].configure(waveforms=Channel.TRIANGLE + Channel.SQUARE,
attack=0.016,
decay=0.168,
sustain=0xafff / 65535,
release=0.168,
volume=10000 / 65535)
channels[1].configure(waveforms=Channel.SINE + Channel.SQUARE,
attack=0.038,
decay=0.300,
sustain=0,
release=0,
volume=12000 / 65535)
channels[2].configure(waveforms=Channel.NOISE,
attack=0.005,
decay=0.010,
sustain=16000 / 65535,
release=0.100,
volume=18000 / 65535)
channels[3].configure(waveforms=Channel.NOISE,
attack=0.005,
decay=0.005,
sustain=8000 / 65535,
release=0.040,
volume=8000 / 65535)
channels[4].configure(waveforms=Channel.SQUARE,
attack=0.010,
decay=0.100,
sustain=0,
release=0.500,
volume=12000 / 65535)
def gradient(r, g, b):
for y in range(0, height):
for x in range(0, width):
graphics.set_pen(graphics.create_pen(int((r * x) / 52), int((g * x) / 52), int((b * x) / 52)))
graphics.pixel(x, y)
def grid(r, g, b):
for y in range(0, height):
for x in range(0, width):
if (x + y) % 2 == 0:
graphics.set_pen(graphics.create_pen(r, g, b))
else:
graphics.set_pen(0)
graphics.pixel(x, y)
def outline_text(text):
ms = time.ticks_ms()
graphics.set_font("bitmap6")
v = int((math.sin(ms / 100.0) + 1.0) * 127.0)
w = graphics.measure_text(text, 1)
x = int(16 / 2 - w / 2 + 1)
y = 5
graphics.set_pen(0)
graphics.text(text, x - 1, y - 1, -1, 1)
graphics.text(text, x, y - 1, -1, 1)
graphics.text(text, x + 1, y - 1, -1, 1)
graphics.text(text, x - 1, y, -1, 1)
graphics.text(text, x + 1, y, -1, 1)
graphics.text(text, x - 1, y + 1, -1, 1)
graphics.text(text, x, y + 1, -1, 1)
graphics.text(text, x + 1, y + 1, -1, 1)
graphics.set_pen(graphics.create_pen(v, v, v))
graphics.text(text, x, y, -1, 1)
su.set_brightness(0.5)
# Vars for storing button state
was_a_pressed = False
was_b_pressed = False
was_c_pressed = False
was_d_pressed = False
was_z_pressed = False
# The two frequencies to play
tone_a = 0
tone_b = 0
# The current synth beat
beat = 0
def next_beat():
global beat
for i in range(5):
if notes[i][beat] > 0:
channels[i].frequency(notes[i][beat])
channels[i].trigger_attack()
elif notes[i][beat] == -1:
channels[i].trigger_release()
beat = (beat + 1) % SONG_LENGTH
def tick(timer):
next_beat()
timer = Timer(-1)
synthing = False
while True:
time_ms = time.ticks_ms()
test = (time_ms // 1000) % 5
if su.is_pressed(StellarUnicorn.SWITCH_A):
if not was_a_pressed:
channels[0].volume(10000 / 65535)
channels[1].volume(12000 / 65535)
channels[2].volume(18000 / 65535)
channels[3].volume(8000 / 65535)
channels[4].volume(12000 / 65535)
channels[5].volume(0)
# If the synth is not already playing, init the first beat
if not synthing:
beat = 0
next_beat()
su.play_synth()
synthing = True
timer.init(freq=10, mode=Timer.PERIODIC, callback=tick)
was_a_pressed = True
else:
was_a_pressed = False
if su.is_pressed(StellarUnicorn.SWITCH_B):
if not was_b_pressed:
channels[0].volume(0)
channels[1].volume(12000 / 65535)
channels[2].volume(0)
channels[3].volume(0)
channels[4].volume(0)
channels[5].volume(0)
# If the synth is not already playing, init the first beat
if not synthing:
beat = 0
next_beat()
su.play_synth()
synthing = True
timer.init(freq=10, mode=Timer.PERIODIC, callback=tick)
was_b_pressed = True
else:
was_b_pressed = False
if su.is_pressed(StellarUnicorn.SWITCH_C):
if not was_c_pressed:
# Stop synth (if running) and play Tone A
timer.deinit()
tone_a = 400
channels[5].play_tone(tone_a, 0.06)
channels[5].volume(12000 / 65535)
su.play_synth()
synthing = False
was_c_pressed = True
else:
was_c_pressed = False
if su.is_pressed(StellarUnicorn.SWITCH_D):
if not was_d_pressed:
# Stop synth (if running) and play Tone B
timer.deinit()
tone_b = 600
channels[5].play_tone(tone_b, 0.06, attack=0.5)
channels[5].volume(12000 / 65535)
su.play_synth()
synthing = False
was_d_pressed = True
else:
was_d_pressed = False
if su.is_pressed(StellarUnicorn.SWITCH_BRIGHTNESS_UP):
if tone_b > 0: # Zero means tone not playing
# Increase Tone B
tone_b = min(tone_b + 10, 20000)
channels[5].frequency(tone_b)
if su.is_pressed(StellarUnicorn.SWITCH_BRIGHTNESS_DOWN):
if tone_b > 0: # Zero means tone not playing
# Decrease Tone B
tone_b = max(tone_b - 10, 10)
channels[5].frequency(max(tone_b, 10))
if su.is_pressed(StellarUnicorn.SWITCH_VOLUME_UP):
if tone_a > 0: # Zero means tone not playing
# Increase Tone A
tone_a = min(tone_a + 10, 20000)
channels[5].frequency(tone_a)
if su.is_pressed(StellarUnicorn.SWITCH_VOLUME_DOWN):
if tone_a > 0: # Zero means tone not playing
# Decrease Tone A
tone_a = max(tone_a - 10, 10)
channels[5].frequency(tone_a)
if su.is_pressed(StellarUnicorn.SWITCH_SLEEP):
if not was_z_pressed:
# Stop synth and both tones
tone_a = 0
tone_b = 0
su.stop_playing()
timer.deinit()
synthing = False
was_z_pressed = True
else:
was_z_pressed = False
graphics.set_pen(graphics.create_pen(0, 0, 0))
graphics.clear()
if test == 0:
# print("grid pattern")
grid(255, 255, 255)
elif test == 1:
# print("red gradient")
gradient(255, 0, 0)
elif test == 2:
# print("green gradient")
gradient(0, 255, 0)
elif test == 3:
# print("blue gradient")
gradient(0, 0, 255)
elif test == 4:
# print("white gradient")
gradient(255, 255, 255)
text = ""
if su.is_pressed(StellarUnicorn.SWITCH_A):
text = "PlaySyn"
if su.is_pressed(StellarUnicorn.SWITCH_B):
text = "SoloSyn"
if su.is_pressed(StellarUnicorn.SWITCH_C):
text = "Tone A"
if su.is_pressed(StellarUnicorn.SWITCH_D):
text = "Tone B"
if su.is_pressed(StellarUnicorn.SWITCH_VOLUME_UP):
text = "RaiseA"
if su.is_pressed(StellarUnicorn.SWITCH_VOLUME_DOWN):
text = "LowerA"
if su.is_pressed(StellarUnicorn.SWITCH_BRIGHTNESS_UP):
text = "RaiseB"
if su.is_pressed(StellarUnicorn.SWITCH_BRIGHTNESS_DOWN):
text = "LowerB"
if su.is_pressed(StellarUnicorn.SWITCH_SLEEP):
text = "Stop"
outline_text(text)
su.update(graphics)
# pause for a moment (important or the USB serial device will fail
time.sleep(0.001)
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