PPBHX: harness start (production ppb_1284.c + ppb_base.c)
PPBHX: --- DF-5418 ppb_peripheral_negotiate spin off-by-one ---
PPBHX: DF-5418 T1 host-answers-poll-10: ret=0 state=12 error=0 rstr=11 (correct: ret=0/state=PPB_PERIPHERAL_IDLE; buggy: ret=ENODEV(19))
PPBHX: DF-5418 T2 host-answers-poll-5 : ret=0 state=12 error=0 rstr=6 (control: expect ret=0, state=12)
PPBHX: DF-5418 T3 host-silent-timeout : ret=19 state=1 error=0 (correct: ret=ENODEV(19); buggy: ret=EINVAL(22) + error=PPB_MODE_UNSUPPORTED(1))
PPBHX: --- DF-5419 ppb_1284_read_id *read uninitialized ---
PPBHX: DF-5419 T4 read_id-negotiate-fail: ret=19 read=0x5a5a5a5a state=0 error=2 (correct: read=0; buggy: read=sentinel 0x5A5A5A5A untouched)
PPBHX: harness done