#L8c - Program generare sunete pentu notele muzicale
# din octava de baza
# 
# Difuzor conectat la pin21 (GP16)
from machine import Pin, Timer, PWM

import utime

song=PWM(Pin(16)) #
do=440      # frecventele pentru gama 
re=494
mi=523
fa=587
sol=659
la=698
si=784

lp = Pin(25, Pin.OUT) # LED pentru ritm
sys = Timer()

def blink(timer):     #ritm
	global lp
	lp.toggle()
	
sys.init(freq=4, mode=Timer.PERIODIC, callback=blink)

while True:   
	for i in [do, do, re, mi, do, mi, do, sol, sol]: # partitura
		song.freq(i)
		song.duty_u16(32000) # 50%
		utime.sleep(0.25)
		song.deinit()        # stop PWM
		utime.sleep(0.25)