This feature allows you to use RGB LED matrices driven by external drivers. It hooks into the RGBLIGHT system so you can use the same keycodes as RGBLIGHT to control it.
If you want to use single color LED's you should use the [LED Matrix Subsystem](feature_led_matrix.md) instead.
Where `Cx_y` is the location of the LED in the matrix defined by [the datasheet](http://www.issi.com/WW/pdf/31FL3731.pdf) and the header file `drivers/issi/is31fl3731.h`. The `driver` is the index of the driver you defined in your `config.h` (`0` or `1` right now).
Where `X_Y` is the location of the LED in the matrix defined by [the datasheet](http://www.issi.com/WW/pdf/31FL3733.pdf) and the header file `drivers/issi/is31fl3733.h`. The `driver` is the index of the driver you defined in your `config.h` (Only `0` right now).
There is basic support for addressable RGB matrix lighting with a WS2811/WS2812{a,b,c} addressable LED strand. To enable it, add this to your `rules.mk`:
From this point forward the configuration is the same for all the drivers. The struct rgb_led array tells the system for each led, what key electrical matrix it represents, what the physical position is on the board, and if the led is for a modifier key or not. Here is a brief example:
The first part, `{row | col << 4}`, tells the system what key this LED represents by using the key's electrical matrix row & col. The second part, `{x=0..224, y=0..64}` represents the LED's physical position on the keyboard. The `x` is between (inclusive) 0-224, and `y` is between (inclusive) 0-64 as the effects are based on this range. The easiest way to calculate these positions is imagine your keyboard is a grid, and the top left of the keyboard represents x, y coordinate 0, 0 and the bottom right of your keyboard represents 224, 64. Using this as a basis, you can use the following formula to calculate the physical position:
All effects have been configured to support current configuration values (Hue, Saturation, Value, & Speed) unless otherwise noted below. These are the effects that are currently available:
```C
enum rgb_matrix_effects {
RGB_MATRIX_NONE = 0,
RGB_MATRIX_SOLID_COLOR = 1, // Static single hue, no speed support
RGB_MATRIX_ALPHAS_MODS, // Static dual hue, speed is hue for secondary hue
RGB_MATRIX_GRADIENT_UP_DOWN, // Static gradient top to bottom, speed controls how much gradient changes
RGB_MATRIX_BREATHING, // Single hue brightness cycling animation
RGB_MATRIX_CYCLE_ALL, // Full keyboard solid hue cycling through full gradient
RGB_MATRIX_CYCLE_LEFT_RIGHT, // Full gradient scrolling left to right
RGB_MATRIX_CYCLE_UP_DOWN, // Full gradient scrolling top to bottom
RGB_MATRIX_RAINBOW_MOVING_CHEVRON, // Full gradent Chevron shapped scrolling left to right
RGB_MATRIX_DUAL_BEACON, // Full gradient spinning around center of keyboard
RGB_MATRIX_RAINBOW_BEACON, // Full tighter gradient spinning around center of keyboard
RGB_MATRIX_RAINBOW_PINWHEELS, // Full dual gradients spinning two halfs of keyboard
RGB_MATRIX_RAINDROPS, // Randomly changes a single key's hue
RGB_MATRIX_JELLYBEAN_RAINDROPS, // Randomly changes a single key's hue and saturation
RGB_MATRIX_DIGITAL_RAIN, // That famous computer simulation
#define RGB_MATRIX_KEYPRESSES // reacts to keypresses
#define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (instead of keypresses)
#define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
#define RGB_DISABLE_WHEN_USB_SUSPENDED false // turn off effects when suspended
#define RGB_MATRIX_LED_PROCESS_LIMIT (DRIVER_LED_TOTAL + 4) / 5 // limits the number of LEDs to process in an animation per task run (increases keyboard responsiveness)
#define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
#define RGB_MATRIX_MAXIMUM_BRIGHTNESS 200 // limits maximum brightness of LEDs to 200 out of 255. If not defined maximum brightness is set to 255
The EEPROM for it is currently shared with the RGBLIGHT system (it's generally assumed only one RGB would be used at a time), but could be configured to use its own 32bit address with:
