The player converts a music string in "Ring Tone Text Transfer Language" code into pitch and duration.
Inspired by the idea of reusing the piezo detectors contained in discarded smoke detectors, the desire to play melodies arose.
The rtttl-player converts the RTTTL melody string into a Tone list. Regular expressions (=> dartino_regexp pkg) is used to analyse the music string.
A user defined tone player (lamdba function) is intented to control your own device.
jag pkg install github.com/kaxori/rtttl-player
import rtttl-player show *
import gpio show Pin
import gpio.pwm show Pwm
GPIO_BUZZER ::= 16
BUZZER ::= Pin GPIO_BUZZER
play-host pitch duration:
print "pitch: $(%5d pitch), duration: $duration ms"
play-buzzer freq length:
if freq > 0: // play tone
melody_pwm := Pwm --frequency=freq
melody_channel := melody_pwm.start BUZZER
melody_channel.set_duty_factor 0.5
sleep --ms=length
melody_pwm.close
else: // pause
sleep --ms=length
main:
SMOKE ::= "smoke:o=5,d=4,b=130:c,d#,f.,c,d#,8f#,f,p,c,d#,f.,d#,c,2p,8p,c,d#,f.,c,d#,8f#,f,p,c,d#,f.,d#,c"
rtttl := rtttl-player (:: | pitch duration | play-buzzer pitch duration )
rtttl.play SMOKE
Wiki RTTTL: https://de.wikipedia.org/wiki/Ring_Tones_Text_Transfer_Language
RTTTL Format Specifications: http://merwin.bespin.org/t4a/specs/nokia_rtttl.txt
To play RTTTL online: https://adamonsoon.github.io/rtttl-play/
Collection of melodies: https://1j01.github.io/rtttl.js/
Toit regexp package: https://pkg.toit.io/package/github.com%2Ferikcorry%[email protected]
Online RegExp tester: https://regex101.com/