March 26, 2025

Black Pill boards - F411 USB -- Setup packets - interface requests

What are these interface requests:
Rx setup (8) 0009010000000000
Setup device request
Configured 1-- addressed
Rx setup (8) 2120000000000700
Setup interface request
Tick 1 -- bytes: 0 -- int, sof, xof = 905 831 96
Tick 2 -- bytes: 0 -- int, sof, xof = 1854 1780 96
Tick 3 -- bytes: 0 -- int, sof, xof = 2803 2729 96
Tick 4 -- bytes: 0 -- int, sof, xof = 3752 3678 96
Tick 5 -- bytes: 0 -- int, sof, xof = 4702 4628 96
Tick 6 -- bytes: 0 -- int, sof, xof = 5651 5577 96
Rx setup (8) 2122030000000000
Setup interface request
Rx setup (8) 2122000000000000
Setup interface request
Tick 7 -- bytes: 512 -- int, sof, xof = 6627 6531 120
The above is a short transcript of my debug log showing the very end of enumeration, then later some activity when I send a 512 byte data packet. Ignore the setup device request at the top. I include that simply because it is the last exchange as part of enumeration.
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Tom's Computer Info / tom@mmto.org