(testers wanted!) keyboard4-fw: USB report diffing (and reform-next mode)

minuterequested to merge
next-multitouch into master
  • diff and send USB report chain only if needed (should greatly reduce USB traffic)
  • reduce interval for 120Hz+ support (esp. trackpad)
  • port some of @elb's GPIO optimizations done for pocket-reform
  • port strdup memory leak fix from pocket-reform
  • i cleaned up the debouncing code a bit / commented it more. it currently uses 3 bits for debouncing instead of the previous 1 bit, this could be reduced again if testers feel there's too much latency. how could we measure the latency? (osc scoping?)
Edited by minute

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