SynthModules

My PSIM template code runs with timer interrupts and MIDI input
interrupts.  I've been trying to get MIDI outputs to run with
interrupts instead of polling.  After a couple of days of working
with the AtomPro I've come to the conclusion that the oninterrupt
command is not working for transmit buffer empty.

I've gotten all the buffer code working and I'm streaming CC
messages to my PAiA MIDI2CV by simply executing the transmitter
ISR code on 1 mS timer interrupts.  Since MIDI bytes are ~ 320 uS
this puts a ~680 uS pause between bytes.  At least I know my
code logic executes correctly.

I've measured the ISR routine and it's ~200 uS long which leads me
to believe MIDI output interrupts will never really work since over
60% of the available processing time between interrupts will be spent
in the ISR.

Perhaps leaving it as is with transmiting the data during the timer
interrupts would be best.  I've sent a support ticket into
BasicMicro.  We'll see what they say.  When I wrote the code for
my interrupt MIDI input the oninterrupt for serial input did not
function.  Perhaps they only corrected half ...

Anyone done any work with MIDI output or feel like playing around
with interrupt code?  Send me an email.

Dave