SD/Bluetooth Audio Help

[amikulics]

Hi Everyone, I am trying to make a device that can play both audio from bluetooth or audio from an SD card and switch between these sources at the press of a button.

I have been using pschatzmann's library for Bluetooth and this has worked well. I am also using Arduino-Audio-Tools for SD card playback but this has given me some trouble.

Currently I have issues switching between these sources. That is, it starts in BT mode by default and I can switch between BT and SD without issue, but if a BT device is connected then it will crash upon switching. This crash is accompanied by malloc errors in console and a register dump. I am able to start in BT mode and play music, only switching between BT/SD after a BT device is connected causes the crash.

The code uses a basic state machine with a playbackMode variable. This is setup so BT or SD will have an initialization stage before the main loop code runs. The stages are split up in if blocks like "currentState == initBluetooth" in handleBluetooth() and handleSDcard().

I think there is an issue with some of the BT variables not being deinitialized or reinitialized correctly but my experiments have not yielded much. I will include pastebin links to my source and error output. The code I linked is a simplified version and not very polished but includes all the same BT/SD parts.

If anyone has any experience or suggestion for this, please comment!

Thanks for reading!

Error: https://pastebin.com/pvLTvDbW
Source: https://pastebin.com/t3TeA8Uy
Header: https://pastebin.com/AgK4mYjK