def record():
"""Record and return message."""
print("Start typing your Morse Code message! Wait 5 seconds to exit")
pressed_time = 0
delay_time = 0
symbols = ""
msg = ""
x = 0
while True:
if button.value() == 0:
# pushed, light LED, play sound, and count how long its pushed
led.high()
speaker.duty_u16(VOLUME_MAX)
delay_time = 0
pressed_time += 1
elif button.value() == 1:
# not pushed, accum symbol/letter/message after appropriate pauses
speaker.duty_u16(VOLUME_OFF)
led.off()
# if button was just released, capture symbol
if pressed_time > 0:
if pressed_time <= 25:
symbols += "s"
width = 4
else:
symbols += "l"
width = 8
oled.fill_rect(x, 32, width, 4, 1)
oled.show()
x += width + 6
pressed_time = 0
delay_time += 1
# break between symbols (find letter)
if delay_time == 60 and symbols:
letter = lookup_code(symbols)
msg += letter
print(symbols, ":", letter, "=>", msg)
symbols = ""
oled.fill_rect(0, 28, 128, 16, 0)
x = 0
# break between words (find word)
if delay_time == 300:
msg += " "
if delay_time == 500:
print("(Exiting recording mode)")
oled.fill_rect(x, 28, 128, 16, 0)
led.on()
return msg.strip()
sleep(0.01)
def play_note(note, length):
if note.startswith(">"):
length *= 1.5
note = note[1:]
speaker.duty_u16(1500)
speaker.freq(NOTES[note])
sleep(length)
speaker.duty_u16(0)
sleep(0.05)
def play_letter(letter, listen=False):
"""Play single letter, flashing LED and making sound."""
code = LETTER_TO_CODE.get(letter, None)
if code is None:
# space or some other punctuation
sleep(PACE_SEC * 4)
return
if not listen:
print(letter, ":", code)
# Draw symbol on display -- first, clear it
oled_clear()
oled.text(letter.upper(), 0, 29)
x = 16
for c in code:
width = 4 if c == 's' else 8
oled.fill_rect(x, 32, width, 4, 1)
x += width + 6
oled.show()
# Play symbol
for c in code:
pace = PACE_SEC if c == 's' else PACE_SEC * 2
led.high()
speaker.duty_u16(VOLUME_MAX)
sleep(pace)
led.low()
speaker.duty_u16(VOLUME_OFF)
sleep(PACE_SEC)
sleep(PACE_SEC * 3)
oled.fill_rect(0, 28, 128, 16, 0)
def start():
mark("music")
oled_page("Music!")
led.high()
for c in TAKE_ON_ME:
play_note(c, 0.2)
speaker.duty_u16(0)
print("""
A-ha! :-)
I can hum decently well, can't I?
You can learn more at {url}
When you'd like to move on:
>>> import morse
>>> morse.start()
""".format(url=url("pwm")))
# In order for this to work, you'll need a light sensor connected, which wasn't
# in the kit.
from machine import ADC
from common import speaker, button, VOLUME_OFF, VOLUME_OFF, oled_page
import time
import math
light_sensor = ADC(1)
oled_page("Light theramin", "Expose sensor", "to more/less", "light. Press",
"button to stop")
speaker.duty_u16(VOLUME_MAX)
print("""
Raise and lower your hands over the light sensor or shine a light on it
(it's between the Pico and the screen.)
To stop, press the black button.
""")
prev = light_sensor.read_u16()
while button.value() == 1:
light = light_sensor.read_u16()
print(light)
if abs(prev - light) > 200:
speaker.freq(light // 10)
prev = light
time.sleep(0.1)