Arduino for STM32

You should never try to do "real work" inside an ISR. You should do the absolute minimum possible such as set a global flag (usually marked 'volatile') then get out immediately. You should certainly never try to call anything else that uses or requires interrupts. If you do then, well...y...

ag123 wrote: ↑Wed Jul 08, 2020 10:31 pm my guess if you are simply using serial, the default usb-serial 'driver' may work better,
on stm32f401 with the usb-serial CDC (vcp) 'driver'

I am using USB midi, just using serial for debug.

upon closer investigation it seems I can send some data as long as it's only one packet? this works: CompositeSerial.print("I can send a lot of data as long as it is all sent as one packet like this."); this fails: CompositeSerial.print("two"); CompositeSerial.print("lines&q...

I am making a guitar pedal synchronizing thingamajig and as part of that i want to receive clock pulses from analog sequencers and output a MIDI clock via USB and serial. To get the timing accurate enough I have attached an interrupt to a pin monitoring the clock pulses coming in. Ideally I would se...

What is LSCS ?

Why does the blue pill have 2 crystals?

Would like to see tid happen, can help with testing if necessary

Thanks fredbox! that works like a charm, i was not familiar with the systick interrupts and it took me a minute to realize that STM core was different from Roger Clarks "Arduino STM32" but adding "systick_attach_callback(&encoder1_read);" in setup made it run perfectly on my ...

Any idea where I might find what modifications to make?

Edit: didn't see the above post before posting this

update: It seems the problem is with attaching an interrupt with the argument "CHANGE" : attachInterrupt(digitalPinToInterrupt(PIN_A), encoderISR, CHANGE); //call encoderISR() every high->low or low->high changes the interrupt seems to only trigger on rising edge, I managed to get the enco...