just for fun:
(the real sound is much better than on the video 
)
It is exclusively timer based, so all 4 timers are reserved, configurable channel for each timer in part.
Accurate timing taken from systick.
Source available here: https://github.com/stevstrong/STM32-Tim … ree/master
Can you post a link to the speakers… It looks like they are piezo , but are much bigger than I have.
BTW.
I had a crazy idea because I have Indian Myna birds, in the garden , which are a pest and are noisy.
https://en.wikipedia.org/wiki/Common_myna
They mimic the sounds of other birds, so… I thought perhaps if I put BluePills in the trees, which play some simple tune, then perhaps rather than making the sounds of other birds, they may start makimg the sound of these tunes.
The Wallace and Grommit theme tune was going to be the song I use, e.g. just the first 8 notes
It would be a laugh if all the birds started to sing that at as one of their songs 
Only that the sound of the camera is really miserable.
Yea, it would be fun to learn the birds to sing Mario themes
PS. did you use resistors in series with the speakers?
indestructible…
[stevestrong – Sat Nov 11, 2017 9:05 pm] –
nope, the chip is heating up a bit during playing, but it is still working.
indestructible…
LOL
- 2n2222_amp.jpeg (25.01 KiB) Viewed 987 times
Anyway, I forgot to mention that the sw I posted needs this patch: https://github.com/stevstrong/Arduino_S … 77705acec9
This clears the IRQ flag before enabling the respective IRQ for a timer channel.
Did you try this one.
It’s a five channel synth
But does it have only 1 output?
How does it the 5 channel synth?
Yes, the signals are “analog” like waveforms and are added internally.
It is done here ( line 277 ).
sketch\TimerTone.h:3:23: fatal error: Streaming.h: No such file or directoryhttps://github.com/geneReeves/ArduinoSt … treaming.h
or here (first attachment) http://stm32duino.com/viewtopic.php?f=9&t=2425
Funny, I don’t get any warning/error. Are you using the TonePlayer example from the example folder of the lib?
Did you unpack the files under Arduino/libraries ?
How old is your repo? You should update it, I always update it at least once weekly.
Maybe update the IDE to 1.8.5.
Anyway I updated streaming.h.
Now I have to search for the hardware!
Thanks!
