backlight breathing overhaul (#2187)

* add breathing to bananasplit

* backlight breathing overhaul

* fix the backlight_tick thing.

* fix for vision_division backlight

* fix a few keymaps and probably break breathing for some weirdly set-up boards.

* remove BL_x keycodes because they made unreasonable assumptions

* some fixes for BL keycodes

* integer cie lightness scaling

* use cie lightness for non-breathing backlight and make breathing able to reach true max brightness

1 files changed, 4 insertions, 0 deletions

diff --git a/docs/config_options.md b/docs/config_options.md
index a9ff54995..1dd4cdbaa 100644
--- a/docs/config_options.md
+++ b/docs/config_options.md
@@ -70,6 +70,10 @@ This is a C header file that is one of the first things included, and will persi
   * pin of the backlight - B5, B6, B7 use PWM, others use softPWM
 * `#define BACKLIGHT_LEVELS 3`
   * number of levels your backlight will have (not including off)
+* `#define BACKLIGHT_BREATHING`
+  * enables backlight breathing (only works with backlight pins B5, B6 and B7)
+* `#define BREATHING_PERIOD 6`
+  * the length of one backlight "breath" in seconds
 * `#define DEBOUNCING_DELAY 5`
   * the delay when reading the value of the pin (5 is default)
 * `#define LOCKING_SUPPORT_ENABLE`