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sym_defer_g and sym_eager_pr (#21667)
Co-authored-by: Nebuleon <2391500+Nebuleon@users.noreply.github.com>
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The `matrix_need_update` variable needs to be reset to `false` in
`transfer_matrix_values()`, otherwise that function continues to be
invoked for every scanning loop (forever with `sym_eager_pk` and
`sym_eager_pk`, or until some key gets released with
`asym_eager_defer_pk`), and the scanning rate gets much lower because of
all that useless work.
Co-authored-by: Sergey Vlasov <sigprof@gmail.com>
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* Add fast_timer_t that is 16-bit or 32-bit based on architecture
A 16-bit timer will overflow sooner but be faster to compare on AVR.
* Avoid 8-bit timer overflows in debounce algorithms
Count down remaining elapsed time instead of trying to do 8-bit timer
comparisons.
Add a "none" implementation that is automatically used if DEBOUNCE is
0 otherwise it will break the _pk/_pr count down.
* Avoid unnecessary polling of the entire matrix in sym_eager_pk
The matrix only needs to be updated when a debounce timer expires.
* Avoid unnecessary polling of the entire matrix in sym_eager_pr
The matrix only needs to be updated when a debounce timer expires.
The use of the "needed_update" variable is trying to do what
"matrix_need_update" was added to fix but didn't work because it only
applied when all keys finished debouncing.
* Fix sym_defer_g timing inconsistency compared to other debounce algorithms
DEBOUNCE=5 should process the key after 5ms, not 6ms
* Add debounce tests
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algorithms (#11630)
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* quantum/debounce: rename debouncing algorithms according to Issue 8763
This is the second attempt at implementation, with no ts_ and cy_ prefixes, since those will be implemented with macros.
* Debouncing documentation: Refactor, add some generic info, and merge into a single document
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