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uv-k5-v3-emulator/qemu
mckero 4e29d11810 Update the docs now that the BK4819 is modelled
The "what this cannot do" section said the transceiver was not modelled and treated
that as permanent. Half of it is now wrong: the register interface works. The other
half is still true and worth keeping sharp -- analogue behaviour is out of reach
because the chip has no public datasheet, so the driver is the only specification and
it can only say which registers were written.

Rewritten to separate the two: what is modelled and what it fixed (RSSI was hard zero
at 18 call sites), the two constraints the untimed spin loops impose, and then the
line that does not move. Explicitly warns against reading the new test as evidence
about RF.

Also corrects the GPIO comment about idling PB9 low. It described the pin as a
workaround pending a device model; that model now exists, and the idle level only
covers the window between reset and the bus being wired.
2026-08-28 16:46:55 +01:00
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