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nedseb
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STM32WB's SHCI_C2_FUS_GetState swaps CPU2 from the wireless stack to the FUS on the first call and only returns the real state on the second — confirmed against the operator firmware sources. So sending STATUS twice is intentional, both round-trips need to succeed. The previous flag was hoisted across both passes: if the first pass succeeded on attempt #1 but the second pass exhausted all 3 retries, the function still returned Ok and the flow proceeded with the FUS half-locked. Reset success per pass and bail out as soon as one pass exhausts its retries. Also add a doc comment so the "double" name isn't a mystery for the next reader.
nedseb
added a commit
that referenced
this pull request
Apr 28, 2026
STM32WB's SHCI_C2_FUS_GetState swaps CPU2 from the wireless stack to the FUS on the first call and only returns the real state on the second — confirmed against the operator firmware sources. So sending STATUS twice is intentional, both round-trips need to succeed. The previous flag was hoisted across both passes: if the first pass succeeded on attempt #1 but the second pass exhausted all 3 retries, the function still returned Ok and the flow proceeded with the FUS half-locked. Reset success per pass and bail out as soon as one pass exhausts its retries. Also add a doc comment so the "double" name isn't a mystery for the next reader.
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