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195 lines
6.3 KiB
Markdown
195 lines
6.3 KiB
Markdown
# IS31FL3218 Driver {#is31fl3218-driver}
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I²C LED driver by Lumissil. Supports up to 18 single-color LEDs, or 6 RGB LEDs.
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[IS31FL3218 Datasheet](https://www.lumissil.com/assets/pdf/core/IS31FL3218_DS.pdf)
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## Usage {#usage}
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The IS31FL3218 driver code is automatically included if you are using the [LED Matrix](../features/led_matrix) or [RGB Matrix](../features/rgb_matrix) feature with the `is31fl3218` driver set, and you would use those APIs instead.
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However, if you need to use the driver standalone, add this to your `rules.mk`:
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```make
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COMMON_VPATH += $(DRIVER_PATH)/led/issi
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SRC += is31fl3218-mono.c # For single-color
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SRC += is31fl3218.c # For RGB
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I2C_DRIVER_REQUIRED = yes
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```
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## Basic Configuration {#basic-configuration}
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Add the following to your `config.h`:
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|Define |Default |Description |
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|----------------------------|-------------|---------------------------------------------------|
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|`IS31FL3218_SDB_PIN` |*Not defined*|The GPIO pin connected to the driver's shutdown pin|
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|`IS31FL3218_I2C_TIMEOUT` |`100` |The I²C timeout in milliseconds |
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|`IS31FL3218_I2C_PERSISTENCE`|`0` |The number of times to retry I²C transmissions |
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### I²C Addressing {#i2c-addressing}
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The IS31FL3218's 7-bit I²C address is `0x54`, available as `IS31FL3218_I2C_ADDRESS`.
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## ARM/ChibiOS Configuration {#arm-configuration}
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Depending on the ChibiOS board configuration, you may need to [enable and configure I²C](i2c#arm-configuration) at the keyboard level.
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## LED Mapping {#led-mapping}
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In order to use this driver, each output must be mapped to an LED index, by adding the following to your `<keyboardname>.c`:
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```c
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const is31fl3218_led_t PROGMEM g_is31fl3218_leds[IS31FL3218_LED_COUNT] = {
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/* R G B */
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{OUT1, OUT2, OUT3},
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// etc...
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};
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```
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In this example, the red, green and blue channels for the first LED index all have their anodes connected to `VCC`, and their cathodes on the `OUT1`, `OUT2` and `OUT3` pins respectively.
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For the single-color driver, the principle is the same, but there is only one channel:
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```c
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const is31fl3218_led_t PROGMEM g_is31fl3218_leds[IS31FL3218_LED_COUNT] = {
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/* V */
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{OUT1},
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// etc...
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};
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```
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## API {#api}
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### `struct is31fl3218_led_t` {#api-is31fl3218-led-t}
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Contains the PWM register addresses for a single RGB LED.
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#### Members {#api-is31fl3218-led-t-members}
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- `uint8_t r`
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The output PWM register address for the LED's red channel (RGB driver only).
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- `uint8_t g`
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The output PWM register address for the LED's green channel (RGB driver only).
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- `uint8_t b`
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The output PWM register address for the LED's blue channel (RGB driver only).
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- `uint8_t v`
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The output PWM register address for the LED (single-color driver only).
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---
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### `void is31fl3218_init(void)` {#api-is31fl3218-init}
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Initialize the LED driver. This function should be called first.
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---
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### `void is31fl3218_write_register(uint8_t reg, uint8_t data)` {#api-is31fl3218-write-register}
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Set the value of the given register.
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#### Arguments {#api-is31fl3218-write-register-arguments}
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- `uint8_t reg`
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The register address.
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- `uint8_t data`
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The value to set.
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---
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### `void is31fl3218_set_color(int index, uint8_t red, uint8_t green, uint8_t blue)` {#api-is31fl3218-set-color}
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Set the color of a single LED (RGB driver only). This function does not immediately update the LEDs; call `is31fl3218_update_pwm_buffers()` after you are finished.
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#### Arguments {#api-is31fl3218-set-color-arguments}
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- `int index`
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The LED index (ie. the index into the `g_is31fl3218_leds` array).
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- `uint8_t red`
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The red value to set.
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- `uint8_t green`
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The green value to set.
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- `uint8_t blue`
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The blue value to set.
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---
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### `void is31fl3218_set_color_all(uint8_t red, uint8_t green, uint8_t blue)` {#api-is31fl3218-set-color-all}
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Set the color of all LEDs (RGB driver only).
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#### Arguments {#api-is31fl3218-set-color-all-arguments}
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- `uint8_t red`
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The red value to set.
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- `uint8_t green`
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The green value to set.
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- `uint8_t blue`
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The blue value to set.
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---
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### `void is31fl3218_set_value(int index, uint8_t value)` {#api-is31fl3218-set-value}
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Set the brightness of a single LED (single-color driver only). This function does not immediately update the LEDs; call `is31fl3218_update_pwm_buffers()` after you are finished.
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#### Arguments {#api-is31fl3218-set-value-arguments}
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- `int index`
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The LED index (ie. the index into the `g_is31fl3218_leds` array).
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- `uint8_t value`
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The brightness value to set.
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---
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### `void is31fl3218_set_value_all(uint8_t value)` {#api-is31fl3218-set-value-all}
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Set the brightness of all LEDs (single-color driver only).
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#### Arguments {#api-is31fl3218-set-value-all-arguments}
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- `uint8_t value`
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The brightness value to set.
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---
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### `void is31fl3218_set_led_control_register(uint8_t index, bool red, bool green, bool blue)` {#api-is31fl3218-set-led-control-register-rgb}
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Configure the LED control registers for a single LED (RGB driver only). This function does not immediately update the LEDs; call `is31fl3218_update_led_control_registers()` after you are finished.
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#### Arguments {#api-is31fl3218-set-led-control-register-rgb-arguments}
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- `uint8_t index`
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The LED index (ie. the index into the `g_is31fl3218_leds` array).
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- `bool red`
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Enable or disable the red channel.
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- `bool green`
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Enable or disable the green channel.
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- `bool blue`
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Enable or disable the blue channel.
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---
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### `void is31fl3218_set_led_control_register(uint8_t index, bool value)` {#api-is31fl3218-set-led-control-register-mono}
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Configure the LED control registers for a single LED (single-color driver only). This function does not immediately update the LEDs; call `is31fl3218_update_led_control_registers()` after you are finished.
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#### Arguments {#api-is31fl3218-set-led-control-register-mono-arguments}
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- `uint8_t index`
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The LED index (ie. the index into the `g_is31fl3218_leds` array).
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- `bool value`
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Enable or disable the LED.
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---
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### `void is31fl3218_update_pwm_buffers(void)` {#api-is31fl3218-update-pwm-buffers}
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Flush the PWM values to the LED driver.
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---
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### `void is31fl3218_update_led_control_registers(void)` {#api-is31fl3218-update-led-control-registers}
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Flush the LED control register values to the LED driver.
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