90 lines
3.2 KiB
Markdown
90 lines
3.2 KiB
Markdown
# LED Matrix Lighting
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This feature allows you to use LED matrices driven by external drivers. It hooks into the backlight system so you can use the same keycodes as backlighting to control it.
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If you want to use RGB LED's you should use the [RGB Matrix Subsystem](feature_rgb_matrix.md) instead.
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## Driver configuration
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### IS31FL3731
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There is basic support for addressable LED matrix lighting with the I2C IS31FL3731 RGB controller. To enable it, add this to your `rules.mk`:
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LED_MATRIX_ENABLE = IS31FL3731
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You can use between 1 and 4 IS31FL3731 IC's. Do not specify `LED_DRIVER_ADDR_<N>` defines for IC's that are not present on your keyboard. You can define the following items in `config.h`:
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| Variable | Description | Default |
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|----------|-------------|---------|
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| `ISSI_TIMEOUT` | (Optional) How long to wait for i2c messages | 100 |
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| `ISSI_PERSISTENCE` | (Optional) Retry failed messages this many times | 0 |
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| `LED_DRIVER_COUNT` | (Required) How many LED driver IC's are present | |
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| `LED_DRIVER_LED_COUNT` | (Required) How many LED lights are present across all drivers | |
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| `LED_DRIVER_ADDR_1` | (Required) Address for the first LED driver | |
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| `LED_DRIVER_ADDR_2` | (Optional) Address for the second LED driver | |
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| `LED_DRIVER_ADDR_3` | (Optional) Address for the third LED driver | |
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| `LED_DRIVER_ADDR_4` | (Optional) Address for the fourth LED driver | |
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Here is an example using 2 drivers.
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// This is a 7-bit address, that gets left-shifted and bit 0
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// set to 0 for write, 1 for read (as per I2C protocol)
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// The address will vary depending on your wiring:
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// 0b1110100 AD <-> GND
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// 0b1110111 AD <-> VCC
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// 0b1110101 AD <-> SCL
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// 0b1110110 AD <-> SDA
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#define LED_DRIVER_ADDR_1 0b1110100
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#define LED_DRIVER_ADDR_2 0b1110110
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#define LED_DRIVER_COUNT 2
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#define LED_DRIVER_1_LED_COUNT 25
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#define LED_DRIVER_2_LED_COUNT 24
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#define LED_DRIVER_LED_COUNT LED_DRIVER_1_LED_TOTAL + LED_DRIVER_2_LED_TOTAL
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Currently only 2 drivers are supported, but it would be trivial to support all 4 combinations.
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Define these arrays listing all the LEDs in your `<keyboard>.c`:
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const is31_led g_is31_leds[DRIVER_LED_TOTAL] = {
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/* Refer to IS31 manual for these locations
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* driver
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* | LED address
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* | | */
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{0, C3_3},
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....
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}
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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-simple.h`. The `driver` is the index of the driver you defined in your `config.h` (`0`, `1`, `2`, or `3` ).
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## Keycodes
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All LED matrix keycodes are currently shared with the [backlight system](feature_backlight.md).
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## LED Matrix Effects
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Currently no LED matrix effects have been created.
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## Custom layer effects
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Custom layer effects can be done by defining this in your `<keyboard>.c`:
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void led_matrix_indicators_kb(void) {
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led_matrix_set_index_value(index, value);
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}
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A similar function works in the keymap as `led_matrix_indicators_user`.
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## Suspended state
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To use the suspend feature, add this to your `<keyboard>.c`:
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void suspend_power_down_kb(void)
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{
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led_matrix_set_suspend_state(true);
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}
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void suspend_wakeup_init_kb(void)
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{
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led_matrix_set_suspend_state(false);
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}
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