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master
forksand-xd87
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fix/oled_timeout
docs/rgb_matrix_startup
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planck_thk
vuepress
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future_ppdis_none
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arm-dac-work
titmlb
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planck_ez_wdg
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clockworkpi
embedded
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automate_kc_prefix
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peb
clueboard_66hs
pragma_once
olkb-defaults
edez2
muon_light
qwiic_hub
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planck_light_rev2
internal/led_qa
l100
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fywut
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readme-update
clueboard_hotswap
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twi2c
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audio_out
gb_port
clueboard_1
info_json_populate
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travis_phases
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make_autocomplete
hid_api
clueboard_arm
sid
keyboards_json
keyboard_identifiers
pp_definitions
teensy_lc_synth
eeprom_update
process_keycode_update
b6_b7_audio
example_keyboards
preonic-1.0
planck-4.0
0.5.0
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LUFA-111009
LUFA-130901
LUFA-130901-BETA
LUFA-140302
LUFA-140928
LUFA-151115
LUFA-170418
breakpoint_2019_08_30
ergodox_ez-161205
gh60-0.1
planck-4.1
planck-4.2
planck-5.0
planck-6.0
planck-6.1
planck-light-1.0
preonic-2.0
v4.0
${ noResults }
Andrew Pritchard
cd30a60d0e
Empirically, waiting for N consecutive identical scans as a debouncing strategy doesn't work very well for the ErgoDox EZ where scans are very slow compared to most keyboards. Instead, debounce the signals by eagerly reporting a change as soon as one scan observes it, but then ignoring further changes from that key for the next N scans. This is implemented by keeping an extra matrix of uint8 countdowns, such that only keys whose countdown is currently zero are eligible to change. When we do observe a change, we bump that key's countdown to DEBOUNCE. During each scan, every nonzero countdown is decremented. With this approach to debouncing, much higher debounce constants are tolerable, because latency does not increase with the constant, and debounce countdowns on one key do not interfere with events on other keys. The only negative effect of increasing the constant is that the minimum duration of a keypress increases. Perhaps I'm just extremely unlucky w.r.t. key switch quality, but I saw occasional bounces even with DEBOUNCE=10; with 15, I've seen none so far. That's around 47ms, which seems like an absolutely insane amount of time for a key to be bouncy, but at least it works. |
8 years ago | |
|---|---|---|
| .. | ||
| keymaps | Changing keymap name to "profet_80" | 8 years ago |
| util | Initial structure for Ergodox as subprojects | 9 years ago |
| 190hotfix.sh | Initial structure for Ergodox as subprojects | 9 years ago |
| Makefile | Flips off MIDI and API_SYSEX | 8 years ago |
| config.h | Change to per-key eager debouncing for ErgoDox EZ. | 8 years ago |
| ez.c | turn off rgb_midi in ez | 8 years ago |
| ez.h | Removing separate ergodox80 project. | 8 years ago |
| i2cmaster.h | Initial structure for Ergodox as subprojects | 9 years ago |
| matrix.c | Change to per-key eager debouncing for ErgoDox EZ. | 8 years ago |
| rules.mk | Remove unneeded makefile include | 8 years ago |
| twimaster.c | Initial structure for Ergodox as subprojects | 9 years ago |