Arduino for STM32

The fact that it ever thought it was sending successfully was due to some wiring errors causing multiple devices to use pins that share a line, in reality it hangs permanently trying to switch to transmit mode and never successfully sends. Going to give libmaple a try tonight.

Edit: After all my changes still nothing! :( The exact same issue. I think I will give libmaple a try next thanks. But I will definitely do some more in depth debugging to see exactly where it hangs. I tried every SPI clock speed from 1 to 8mhz.

Edit2: I did some debugging and found the exact line ...

Thanks again for the suggestions, I tried adjusting just the SPI speed but no dice... I think the boards I bought off Amazon are just bunk. I soldered up 2 identical boards and each one has a different weird issue and the 3rd board that came in the pack simply cannot be uploaded to... going to look ...

So now I fixed what was a ground cable I had accidentally broke off and the board gets power properly, the RFM69 still initializes successfully but now it hangs permanently on RFM_69::send() without ever succeeding... at least it's more predictable behaviour. Any suggestions now? :D

Edit: Nevermind ...

Im not printing anything, I will definitely give the priority thing a try thanks.

ill try skipping the Serial.begin call all together given its not needed.
Edit: I guess my Serial.begin idea was silly because I already tested on an empty project haha. Unfortunately neither seemed to work for me ...

I appreciate the suggestion, I will give it a go later today.
Edit: Unfortunately it did not help, I tried lowering the CPU clock to 20mhz and it actually made it so it sends less often.
This really feels like an interrupt problem, however I'm new at this and I don't really know what my next step is ...

I have been working on a project that uses a WeAct Blackpill V2 with a STM32F411CEU6 microcontroller and an Adafruit RFM69HCW breakout board. I had been working on the project on an Arduino Nano but now I've decided I want a faster processor and more memory so I've upgraded to the blackpill ...