Staars
commented
2 months ago RTTTL play in Berry with hardcoded pin setting for the Ulanzi pixel clock:
#-
- RTTTL driver in Berry using gpio module
-#
class RTTTL
# static song ="HauntedHouse: d=4,o=5,b=108: 2a4, 2e, 2d#, 2b4, 2a4, 2c, 2d, 2a#4, 2e., e, 1f4, 1a4, 1d#, 2e., d, 2c., b4, 1a4, 1p, 2a4, 2e, 2d#, 2b4, 2a4, 2c, 2d, 2a#4, 2e., e, 1f4, 1a4, 1d#, 2e., d, 2c., b4, 1a4"
static song ="dkong:d=4,o=5,b=160:2c,8d.,d#.,c.,16b,16c6,16b,16c6,16b,16c6,16b,16c6,16b,16c6,16b,16c6,16b,2c6"
# static song = "TakeOnMe:d=4,o=4,b=160:8f#5,8f#5,8f#5,8d5,8p,8b,8p,8e5,8p,8e5,8p,8e5,8g#5,8g#5,8a5,8b5,8a5,8a5,8a5,8e5,8p,8d5,8p,8f#5,8p,8f#5,8p,8f#5,8e5,8e5,8f#5,8e5,8f#5,8f#5,8f#5,8d5,8p,8b,8p,8e5,8p,8e5,8p,8e5,8g#5,8g#5,8a5,8b5,8a5,8a5,8a5,8e5,8p,8d5,8p,8f#5,8p,8f#5,8p,8f#5,8e5,8e5"
var name
var duration, octave, bpm, loop_ticks
var track, pos, remaining
var note_val, note_octave, note_left
def init()
import string
import gpio
import math
if global.rtttl_pin == nil # never call this twice after boot
gpio.pin_mode(15,gpio.OUTPUT) # PWM buzzer pin of the Ulanzi clock = 15
global.rtttl_pin = true
end
var parts = string.split(self.song,":")
self.name = parts[0]
print("Loading song:",self.name)
var header = parts[1]
var pos = string.find(header,"d")
if pos>-1 self.duration = int(header[pos+2]) end
pos = string.find(header,"o")
if pos>-1 self.octave = int(header[pos+2]) end
pos = string.find(header,"b")
if pos>-1 self.bpm = int(header[pos+2..]) end # a bit unsafe
self.track = string.split(parts[2],",")
var loop_ticks = (self.bpm/60.0)/self.duration/0.05 # still unsure about
self.loop_ticks = loop_ticks
if loop_ticks%8 > 0
self.loop_ticks = (math.ceil(loop_ticks/8))*8
end
print("Note duration:",self.duration,"Octave:",self.octave,"BPM:",self.bpm,"->loops per note:",self.loop_ticks)
self.pos = 0
self.note_left = 0
print("Track length:",size(self.track))
tasmota.add_driver(self)
end
def note_to_int(note)
# from esp32-hal-led.c - but we return no sharp and no flat
# C C# D Eb E F F# G G# A Bb B
if
note == "c" return 0
elif
note == "d" return 2
elif
note == "e" return 4
elif
note == "f" return 5
elif
note == "g" return 7
elif
note == "a" return 9
else # note == "b"
return 11
end
end
def note_to_freq(note, octave)
# C C# D Eb E F F# G G# A Bb B from esp32-hal-led.c
var freqs = [4186, 4435, 4699, 4978, 5274, 5588, 5920, 6272, 6645, 7040, 7459, 7902]
if (octave > 8 || note > 11)
return 0
end
return freqs[note] / (1 << (8-octave))
end
def is_number(char)
import string
if string.byte(char) > 0x29 && string.byte(char) < 0x3a
return true
end
return false
end
def parse_note(note)
var pos = 0
var length = size(note)
self.note_left = self.loop_ticks / self.duration # default
self.note_octave = self.octave # default
while note[pos] == " " pos+= 1 end # skip white space
if self.is_number(note[pos])
self.note_left = self.loop_ticks / int(note[pos])
print("new length:",self.note_left)
pos += 1
end
if self.is_number(note[pos])
if note[pos] == '6'
self.note_left = self.loop_ticks / 16 # this can only be the 6 of 16
else
self.note_left = self.loop_ticks / 32 # 32 is the fastest we support
end
print("new length:",self.note_left)
pos += 1
end
self.note_val = self.note_to_int(note[pos]) # maybe the only value
pos += 1
if pos == length return end
if note[pos] == "#" # sharp?
self.note_val += 1
if self.note_val > 11
print("Invalid RTTTL !!")
self.note_val = 11
end
pos+= 1
if pos == length return end
end
if note[pos] == "." # punctuated note length
self.note_left = self.note_left + (self.note_left/2)
print("punctuated length:",self.note_left)
pos+= 1
if pos == length return end
end
if self.is_number(note[pos])
self.note_octave = int(note[pos])
pos += 1
end
end
def every_50ms()
import gpio
if self.note_left > 0
self.note_left -= 1 # note still active
return
else
self.pos += 1 # next note
end
if self.pos > size(self.track) - 1
print("Song finished!")
gpio.set_pwm(15,0) # stop
tasmota.remove_driver(self)
return
end
print("Will parse:", self.track[self.pos])
self.parse_note(self.track[self.pos])
print("Note, Octave, Length:",self.note_val,self.note_octave, self.note_left)
var freq = self.note_to_freq(self.note_val,self.note_octave - 1)
gpio.set_pwm_freq(15,freq) # stop
gpio.set_pwm(15,30) # pretty low volume
end
end
return RTTTL()I can add a more refined example to the repo later.
sfromis
Description:
Adds function to set the PWM frequency to Berry's gpio module. Adds ~70 bytes of flash.
Usage:
Can be used to play sounds via a cheap mainboard speaker to signal status, failure and so on.
Complex driver example to play RTTTL ringtones in the comments.
Checklist:
NOTE: The code change must pass CI tests. Your PR cannot be merged unless tests pass