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remove my notes

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peepeetee 2025-06-22 19:16:45 +08:00
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keyboards/momokai/tap_trio_pro/psudocode
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matrix scanning:
scan values
put values in SMA filter:
for each key, there is a sma filter instance
the filter takes in a 2^4=16 values in a circular buffer
3 variables: 4 -> 2^4 -> uint16_t[2^4]
state variable: is filter initialized for this key?
pointer: where in the circular buffer are we?
sum: sum of values in the circular buffer, so that we don't have to access the whole buffer, just 2 elements.
special case: initialization
return unfiltered value if the buffer is not filled yet
get value out, update sensor boundaries only if sma initialized
on minipad, TRAVEL_DISTANCE_IN_0_01MM is set to 400, which is the range of motion switches have.
i.e. at rest - bottomed out = 4mm
sensor calibration logic:
on rephlex, the sensors are updated only when they are at their highest, at the start and in a maintaince task that runs periodically:
on minipad, the sensors are updated dynamically when they are actuated on an ougoing basis:
There is an up deadzone and a down deadzone
calebrate key if this is first pass
run algos on the key:
regular(look at the methods already implemented)
rapid trigger:
1.
default boundaries are hysteresis values, reset state once reached
(if continuous rapid trigger, reset state only if fully released)
2.
when rapid trigger state is false
if value is in rapid trigger zone, press and set rapid trigger state
if state is false && lower than lower hysteresis, press key and set rapid trigger state
3.
when rapid trigger state is true
if pressed && left rt zone or value is 'sensitivity' above peak, release
if not pressed and key is in trigger zone and value is sensitivity below peak, press
4. if a new peak is observed, update it in the key structure
peak here is a up or down, since keeping track of both doesn't make sense
https://www.desmos.com/calculator/qtbbjbsyvi