Changed order of rules in TMK. Documented feature.
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# Debounce algorithm
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QMK supports multiple debounce algorithms through its debounce API.
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The underlying debounce algorithm is determined by which matrix.c file you are using.
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The logic for which debounce method called is below. It checks various defines that you have set in rules.mk
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```
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ifeq ($(strip $(SPLIT_KEYBOARD)), yes)
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# Do nothing, debouncing is inside matrix.c inside split_common
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else ifeq ($(strip $(DEBOUNCE_ALGO)), manual)
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# Do nothing. do your debouncing in matrix.c
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else ifeq ($(strip $(DEBOUNCE_ALGO)), sym_g)
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TMK_COMMON_SRC += $(DEBOUNCE)/debounce_sym_g.c
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else ifeq ($(strip $(DEBOUNCE_ALGO)), eager_pk)
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TMK_COMMON_SRC += $(DEBOUNCE)/debounce_eager_pk.c
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else ifeq ($(strip $(CUSTOM_MATRIX)), yes)
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# Do nothing. Custom matrix code.
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else # default algorithm
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TMK_COMMON_SRC += $(DEBOUNCE)/debounce_sym_g.c
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endif
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```
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# Debounce selection
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The following is for keyboards where ```SPLIT_KEYBOARD``` is not defined as ```YES```
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| DEBOUNCE_ALGO | CUSTOM_MATRIX | Description | What to do |
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| ------------- | -------------| --------------------------------------------------- | ----------------------------- |
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| Not defined | Not defined | You are using the included matrix.c and debounce.c | Nothing. Debounce_sym_g used. |
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| manual | Not defined | You are using the included matrix.c but your own debounce.c | ```SRC += debounce.c``` add your own debounce.c and implement necessary functions |
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| sym_g / eager_pk | Not defined | You are using the included matrix.c and debounce.c | Nothing. Chosen debounce method used. |
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| Not defined | YES | You have your own matrix.c, and your own debounce | Write the fully debounced matrix into matrix.c's matrix |
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| manual | YES | Same as above | same as above |
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| sym_g/ eager_pk | YES | You are using your own matrix.c, but included debounce | Write the raw matrix values into matrix.c's matrix |
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Note:
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If ```SPLIT_KEYBOARD = YES``` is defined, the algorithm inside split_common will be used.
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A future pull request will fix this to use the debounce.c code.
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# Use your own debouncing code
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* Set ```DEBOUNCE_ALGO = manual```.
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* Add ```SRC += debounce.c```
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* Add your own ```debounce.c```. Look at included debounce.c's for sample implementations.
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* Debouncing occurs after every raw matrix scan.
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# Changing between included debouncing methods
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You can either use your own code, by including your own debounce.c, or switch to another included one.
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Included debounce methods are:
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* debounce_eager_pk - debouncing per key. On any state change, response is immediate, followed by ```DEBOUNCE_DELAY``` millseconds of no further input for that key
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* debounce_sym_g - debouncing per keyboard. On any state change, a global timer is set. When ```DEBOUNCE_DELAY``` milliseconds of no changes has occured, all input changes are pushed.
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@ -42,9 +42,7 @@ ifeq ($(PLATFORM),TEST)
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endif
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endif
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# Debounce Modules. If implemented in matrix.c, don't use these.
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# Debounce Modules. If implemented in matrix.c, don't use these.
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ifeq ($(strip $(CUSTOM_MATRIX)), yes)
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ifeq ($(strip $(SPLIT_KEYBOARD)), yes)
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# Do nothing. Custom matrix code.
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else ifeq ($(strip $(SPLIT_KEYBOARD)), yes)
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# Do nothing, debouncing is inside matrix.c inside split_common
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# Do nothing, debouncing is inside matrix.c inside split_common
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else ifeq ($(strip $(DEBOUNCE_ALGO)), manual)
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else ifeq ($(strip $(DEBOUNCE_ALGO)), manual)
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# Do nothing. do your debouncing in matrix.c
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# Do nothing. do your debouncing in matrix.c
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@ -52,6 +50,8 @@ else ifeq ($(strip $(DEBOUNCE_ALGO)), sym_g)
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TMK_COMMON_SRC += $(DEBOUNCE)/debounce_sym_g.c
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TMK_COMMON_SRC += $(DEBOUNCE)/debounce_sym_g.c
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else ifeq ($(strip $(DEBOUNCE_ALGO)), eager_pk)
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else ifeq ($(strip $(DEBOUNCE_ALGO)), eager_pk)
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TMK_COMMON_SRC += $(DEBOUNCE)/debounce_eager_pk.c
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TMK_COMMON_SRC += $(DEBOUNCE)/debounce_eager_pk.c
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else ifeq ($(strip $(CUSTOM_MATRIX)), yes)
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# Do nothing. Custom matrix code.
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else # default algorithm
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else # default algorithm
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TMK_COMMON_SRC += $(DEBOUNCE)/debounce_sym_g.c
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TMK_COMMON_SRC += $(DEBOUNCE)/debounce_sym_g.c
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endif
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endif
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