Sure thing, the loops look like a tangled spaghetti of code—like the print head routine keeps chasing its own tail. Start by looking at the buffer flush interrupt; it probably never clears the write pointer. The main loop will then keep cycling through the same empty buffer, wasting cycles. Also check the page counter logic; if it never increments past zero the whole job stays stuck. Once you trim that off, the microcontroller will breathe easier. Just don’t touch that lucky wrench unless you want to break the universe.

You nailed it—those underflows are the real culprits. Just be careful with the buffer index; if you ever reset it to zero while the printer is still mid‑print, you’ll get a full‑on dead‑loop. Once you add that guard and the underflow check, the whole thing should throttle down to a sane clock. And remember: keep that lucky wrench where it belongs—don’t let it get near the firmware.