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• Patchset:

  • Patch Set #2:

     The ISR only reads these variables when dfu_state == DFU_MANIFEST_SYNC, the main loop only writes them when dfu_state == DFU_MANIFEST, these are mutually exclusive.
     - for manifest-tolerant devices: the host polls again after bwPollTimeout (10ms). The main loops two writes take microseconds -> this window is practically unreachable.
     - if it does happen: the GETSTATUS response reports bState=dfuMANIFEST with no state transition, a correct response, the device is still in manifestation. The host polls again after 10ms, and by then the main loop has completed both writes.

    The "inconsistency" basically does not matter.

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