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|
# RGB Lighting
QMK has the ability to control RGB LEDs attached to your keyboard. This is commonly called *underglow*, due to the LEDs often being mounted on the bottom of the keyboard, producing a nice diffused effect when combined with a translucent case.
Some keyboards come with RGB LEDs preinstalled. Others must have them installed after the fact. See the [Hardware Modification](#hardware-modification) section for information on adding RGB lighting to your keyboard.
Currently QMK supports the following addressable LEDs (however, the white LED in RGBW variants is not supported):
* WS2811, WS2812, WS2812B, WS2812C, etc.
* SK6812, SK6812MINI, SK6805
These LEDs are called "addressable" because instead of using a wire per color, each LED contains a small microchip that understands a special protocol sent over a single wire. The chip passes on the remaining data to the next LED, allowing them to be chained together. In this way, you can easily control the color of the individual LEDs.
## Usage
On keyboards with onboard RGB LEDs, it is usually enabled by default. If it is not working for you, check that your `rules.mk` includes the following:
```make
RGBLIGHT_ENABLE = yes
```
At minimum you must define the data pin your LED strip is connected to, and the number of LEDs in the strip, in your `config.h`. If your keyboard has onboard RGB LEDs, and you are simply creating a keymap, you usually won't need to modify these.
|Define |Description |
|---------------|---------------------------------------------------------------------------------------------------------|
|`RGB_DI_PIN` |The pin connected to the data pin of the LEDs |
|`RGBLED_NUM` |The number of LEDs connected |
|`RGBLED_SPLIT` |(Optional) For split keyboards, the number of LEDs connected on each half directly wired to `RGB_DI_PIN` |
Then you should be able to use the keycodes below to change the RGB lighting to your liking.
### Color Selection
QMK uses [Hue, Saturation, and Value](https://en.wikipedia.org/wiki/HSL_and_HSV) to select colors rather than RGB. The color wheel below demonstrates how this works.
<img src="gitbook/images/color-wheel.svg" alt="HSV Color Wheel" width="250"/>
Changing the **Hue** cycles around the circle.<br>
Changing the **Saturation** moves between the inner and outer sections of the wheel, affecting the intensity of the color.<br>
Changing the **Value** sets the overall brightness.<br>
## Keycodes
|Key |Aliases |Description |
|-------------------|----------|--------------------------------------------------------------------|
|`RGB_TOG` | |Toggle RGB lighting on or off |
|`RGB_MODE_FORWARD` |`RGB_MOD` |Cycle through modes, reverse direction when Shift is held |
|`RGB_MODE_REVERSE` |`RGB_RMOD`|Cycle through modes in reverse, forward direction when Shift is held|
|`RGB_HUI` | |Increase hue, decrease hue when Shift is held |
|`RGB_HUD` | |Decrease hue, increase hue when Shift is held |
|`RGB_SAI` | |Increase saturation, decrease saturation when Shift is held |
|`RGB_SAD` | |Decrease saturation, increase saturation when Shift is held |
|`RGB_VAI` | |Increase value (brightness), decrease value when Shift is held |
|`RGB_VAD` | |Decrease value (brightness), increase value when Shift is held |
|`RGB_MODE_PLAIN` |`RGB_M_P `|Static (no animation) mode |
|`RGB_MODE_BREATHE` |`RGB_M_B` |Breathing animation mode |
|`RGB_MODE_RAINBOW` |`RGB_M_R` |Rainbow animation mode |
|`RGB_MODE_SWIRL` |`RGB_M_SW`|Swirl animation mode |
|`RGB_MODE_SNAKE` |`RGB_M_SN`|Snake animation mode |
|`RGB_MODE_KNIGHT` |`RGB_M_K` |"Knight Rider" animation mode |
|`RGB_MODE_XMAS` |`RGB_M_X` |Christmas animation mode |
|`RGB_MODE_GRADIENT`|`RGB_M_G` |Static gradient animation mode |
|`RGB_MODE_RGBTEST` |`RGB_M_T` |Red, Green, Blue test animation mode |
!> By default, if you have both the RGB Light and the [RGB Matrix](feature_rgb_matrix.md) feature enabled, these keycodes will work for both features, at the same time. You can disable the keycode functionality by defining the `*_DISABLE_KEYCODES` option for the specific feature.
## Configuration
Your RGB lighting can be configured by placing these `#define`s in your `config.h`:
|Define |Default |Description |
|---------------------|-------------|-----------------------------------------------------------------------------|
|`RGBLIGHT_HUE_STEP` |`10` |The number of steps to cycle through the hue by |
|`RGBLIGHT_SAT_STEP` |`17` |The number of steps to increment the saturation by |
|`RGBLIGHT_VAL_STEP` |`17` |The number of steps to increment the brightness by |
|`RGBLIGHT_LIMIT_VAL` |`255` |The maximum brightness level |
|`RGBLIGHT_SLEEP` |*Not defined*|If defined, the RGB lighting will be switched off when the host goes to sleep|
|`RGBLIGHT_SPLIT` |*Not defined*|If defined, synchronization functionality for split keyboards is added|
|`RGBLIGHT_DISABLE_KEYCODES`|*not defined*|If defined, disables the ability to control RGB Light from the keycodes. You must use code functions to control the feature|
## Effects and Animations
Not only can this lighting be whatever color you want,
if `RGBLIGHT_EFFECT_xxxx` or `RGBLIGHT_ANIMATIONS` is defined, you also have a number of animation modes at your disposal:
|Mode number symbol |Additional number |Description |
|-----------------------------|-------------------|---------------------------------------|
|`RGBLIGHT_MODE_STATIC_LIGHT` | *None* |Solid color (this mode is always enabled) |
|`RGBLIGHT_MODE_BREATHING` | 0,1,2,3 |Solid color breathing |
|`RGBLIGHT_MODE_RAINBOW_MOOD` | 0,1,2 |Cycling rainbow |
|`RGBLIGHT_MODE_RAINBOW_SWIRL`| 0,1,2,3,4,5 |Swirling rainbow |
|`RGBLIGHT_MODE_SNAKE` | 0,1,2,3,4,5 |Snake |
|`RGBLIGHT_MODE_KNIGHT` | 0,1,2 |Knight |
|`RGBLIGHT_MODE_CHRISTMAS` | *None* |Christmas |
|`RGBLIGHT_MODE_STATIC_GRADIENT`| 0,1,..,9 |Static gradient |
|`RGBLIGHT_MODE_RGB_TEST` | *None* |RGB Test |
|`RGBLIGHT_MODE_ALTERNATING` | *None* |Alternating |
|`RGBLIGHT_MODE_TWINKLE` | 0,1,2,3,4,5 |Twinkle |
Check out [this video](https://youtube.com/watch?v=VKrpPAHlisY) for a demonstration.
Note: For versions older than 0.6.117, The mode numbers were written directly. In `quantum/rgblight.h` there is a contrast table between the old mode number and the current symbol.
### Effect and Animation Toggles
Use these defines to add or remove animations from the firmware. When you are running low on flash space, it can be helpful to disable animations you are not using.
|Define |Default |Description |
|------------------------------------|-------------|-------------------------------------------------------------------------|
|`RGBLIGHT_ANIMATIONS` |*Not defined*|Enable all additional animation modes. |
|`RGBLIGHT_EFFECT_ALTERNATING` |*Not defined*|Enable alternating animation mode. |
|`RGBLIGHT_EFFECT_BREATHING` |*Not defined*|Enable breathing animation mode. |
|`RGBLIGHT_EFFECT_CHRISTMAS` |*Not defined*|Enable christmas animation mode. |
|`RGBLIGHT_EFFECT_KNIGHT` |*Not defined*|Enable knight animation mode. |
|`RGBLIGHT_EFFECT_RAINBOW_MOOD` |*Not defined*|Enable rainbow mood animation mode. |
|`RGBLIGHT_EFFECT_RAINBOW_SWIRL` |*Not defined*|Enable rainbow swirl animation mode. |
|`RGBLIGHT_EFFECT_RGB_TEST` |*Not defined*|Enable RGB test animation mode. |
|`RGBLIGHT_EFFECT_SNAKE` |*Not defined*|Enable snake animation mode. |
|`RGBLIGHT_EFFECT_STATIC_GRADIENT` |*Not defined*|Enable static gradient mode. |
|`RGBLIGHT_EFFECT_TWINKLE` |*Not defined*|Enable twinkle animation mode. |
### Effect and Animation Settings
The following options are used to tweak the various animations:
|Define |Default |Description |
|------------------------------------|-------------|-------------------------------------------------------------------------------------|
|`RGBLIGHT_EFFECT_BREATHE_CENTER` |*Not defined*|If defined, used to calculate the curve for the breathing animation. Valid values are 1.0 to 2.7 |
|`RGBLIGHT_EFFECT_BREATHE_MAX` |`255` |The maximum brightness for the breathing mode. Valid values are 1 to 255 |
|`RGBLIGHT_EFFECT_CHRISTMAS_INTERVAL`|`1000` |How long to wait between light changes for the "Christmas" animation, in milliseconds|
|`RGBLIGHT_EFFECT_CHRISTMAS_STEP` |`2` |The number of LEDs to group the red/green colors by for the "Christmas" animation |
|`RGBLIGHT_EFFECT_KNIGHT_LED_NUM` |`RGBLED_NUM` |The number of LEDs to have the "Knight" animation travel |
|`RGBLIGHT_EFFECT_KNIGHT_LENGTH` |`3` |The number of LEDs to light up for the "Knight" animation |
|`RGBLIGHT_EFFECT_KNIGHT_OFFSET` |`0` |The number of LEDs to start the "Knight" animation from the start of the strip by |
|`RGBLIGHT_RAINBOW_SWIRL_RANGE` |`255` |Range adjustment for the rainbow swirl effect to get different swirls |
|`RGBLIGHT_EFFECT_SNAKE_LENGTH` |`4` |The number of LEDs to light up for the "Snake" animation |
|`RGBLIGHT_EFFECT_TWINKLE_LIFE` |`75` |Adjusts how quickly each LED brightens and dims when twinkling (in animation steps) |
|`RGBLIGHT_EFFECT_TWINKLE_PROBABILITY`|`1/127` |Adjusts how likely each LED is to twinkle (on each animation step) |
### Example Usage to Reduce Memory Footprint
1. Remove `RGBLIGHT_ANIMATIONS` from `config.h`.
1. Selectively add the animations you want to enable. The following would enable two animations and save about 4KiB:
```diff
#undef RGBLED_NUM
-#define RGBLIGHT_ANIMATIONS
+#define RGBLIGHT_EFFECT_STATIC_GRADIENT
+#define RGBLIGHT_EFFECT_RAINBOW_SWIRL
#define RGBLED_NUM 12
#define RGBLIGHT_HUE_STEP 8
#define RGBLIGHT_SAT_STEP 8
```
### Animation Speed
You can also modify the speeds that the different modes animate at:
Here is a quick demo on Youtube (with NPKC KC60) (https://www.youtube.com/watch?v=VKrpPAHlisY).
```c
// How long (in milliseconds) to wait between animation steps for each of the "Solid color breathing" animations
const uint8_t RGBLED_BREATHING_INTERVALS[] PROGMEM = {30, 20, 10, 5};
// How long (in milliseconds) to wait between animation steps for each of the "Cycling rainbow" animations
const uint8_t RGBLED_RAINBOW_MOOD_INTERVALS[] PROGMEM = {120, 60, 30};
// How long (in milliseconds) to wait between animation steps for each of the "Swirling rainbow" animations
const uint8_t RGBLED_RAINBOW_SWIRL_INTERVALS[] PROGMEM = {100, 50, 20};
// How long (in milliseconds) to wait between animation steps for each of the "Snake" animations
const uint8_t RGBLED_SNAKE_INTERVALS[] PROGMEM = {100, 50, 20};
// How long (in milliseconds) to wait between animation steps for each of the "Knight" animations
const uint8_t RGBLED_KNIGHT_INTERVALS[] PROGMEM = {127, 63, 31};
// How long (in milliseconds) to wait between animation steps for each of the "Twinkle" animations
const uint8_t RGBLED_TWINKLE_INTERVALS[] PROGMEM = {50, 25, 10};
// These control which hues are selected for each of the "Static gradient" modes
const uint8_t RGBLED_GRADIENT_RANGES[] PROGMEM = {255, 170, 127, 85, 64};
|
