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LED drivers: extract documentation from LED/RGB Matrix pages (#23630)

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186
docs/features/led_matrix.md
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@ -4,176 +4,32 @@ This feature allows you to use LED matrices driven by external drivers. It hooks
If you want to use RGB LED's you should use the [RGB Matrix Subsystem](rgb_matrix) instead.
## Driver configuration {#driver-configuration}
---
### IS31FL3731 {#is31fl3731}
## Driver Configuration {#driver-configuration}
There is basic support for addressable LED matrix lighting with the I2C IS31FL3731 LED controller. To enable it, add this to your `rules.mk`:
LED Matrix is an abstraction layer on top of an underlying LED driver API. The list of supported LED drivers is below; see the respective documentation for information on how to configure the driver.
|Driver |Max LEDs|
|-------------------------------------|--------|
|[IS31FL3218](../drivers/is31fl3218) |18 |
|[IS31FL3236](../drivers/is31fl3236) |36 |
|[IS31FL3729](../drivers/is31fl3729) |135 |
|[IS31FL3731](../drivers/is31fl3731) |144 |
|[IS31FL3733](../drivers/is31fl3733) |192 |
|[IS31FL3736](../drivers/is31fl3736) |96 |
|[IS31FL3737](../drivers/is31fl3737) |144 |
|[IS31FL3741](../drivers/is31fl3741) |351 |
|[IS31FL3742A](../drivers/is31fl3742a)|180 |
|[IS31FL3743A](../drivers/is31fl3743a)|198 |
|[IS31FL3745](../drivers/is31fl3745) |144 |
|[IS31FL3746A](../drivers/is31fl3746a)|72 |
|[SNLED27351](../drivers/snled27351) |192 |
To assign the LED Matrix driver, add the following to your `rules.mk`, for example:
```make
LED_MATRIX_ENABLE = yes
LED_MATRIX_DRIVER = is31fl3731
LED_MATRIX_DRIVER = is31fl3218
```
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`:
| Variable | Description | Default |
|----------|-------------|---------|
| `IS31FL3731_I2C_TIMEOUT` | (Optional) How long to wait for i2c messages, in milliseconds | 100 |
| `IS31FL3731_I2C_PERSISTENCE` | (Optional) Retry failed messages this many times | 0 |
| `LED_MATRIX_LED_COUNT` | (Required) How many LED lights are present across all drivers | |
| `IS31FL3731_I2C_ADDRESS_1` | (Required) Address for the first LED driver | |
| `IS31FL3731_I2C_ADDRESS_2` | (Optional) Address for the second LED driver | |
| `IS31FL3731_I2C_ADDRESS_3` | (Optional) Address for the third LED driver | |
| `IS31FL3731_I2C_ADDRESS_4` | (Optional) Address for the fourth LED driver | |
Here is an example using 2 drivers.
```c
// This is a 7-bit address, that gets left-shifted and bit 0
// set to 0 for write, 1 for read (as per I2C protocol)
// The address will vary depending on your wiring:
// 00 AD <-> GND
// 01 AD <-> SCL
// 10 AD <-> SDA
// 11 AD <-> VCC
// ADDR represents A1:A0 of the 7-bit address.
// The result is: 0b11101(ADDR)
#define IS31FL3731_I2C_ADDRESS_1 IS31FL3731_I2C_ADDRESS_GND
#define IS31FL3731_I2C_ADDRESS_2 IS31FL3731_I2C_ADDRESS_SDA
#define LED_DRIVER_1_LED_TOTAL 25
#define LED_DRIVER_2_LED_TOTAL 24
#define LED_MATRIX_LED_COUNT (LED_DRIVER_1_LED_TOTAL + LED_DRIVER_2_LED_TOTAL)
```
::: warning
Note the parentheses, this is so when `LED_MATRIX_LED_COUNT` is used in code and expanded, the values are added together before any additional math is applied to them. As an example, `rand() % (LED_DRIVER_1_LED_TOTAL + LED_DRIVER_2_LED_TOTAL)` will give very different results than `rand() % LED_DRIVER_1_LED_TOTAL + LED_DRIVER_2_LED_TOTAL`.
:::
For split keyboards using `LED_MATRIX_SPLIT` with an LED driver, you can either have the same driver address or different driver addresses. If using different addresses, use `IS31FL3731_I2C_ADDRESS_1` for one and `IS31FL3731_I2C_ADDRESS_2` for the other one. Then, in `g_is31fl3731_leds`, fill out the correct driver index (0 or 1). If using one address, use `IS31FL3731_I2C_ADDRESS_1` for both, and use index 0 for `g_is31fl3731_leds`.
Define these arrays listing all the LEDs in your `<keyboard>.c`:
```c
const is31fl3731_led_t PROGMEM g_is31fl3731_leds[IS31FL3731_LED_COUNT] = {
/* Refer to IS31 manual for these locations
* driver
* | LED address
* | | */
{ 0, C1_1 },
{ 0, C1_15 },
// ...
}
```
Where `Cx_y` is the location of the LED in the matrix defined by [the datasheet](https://www.issi.com/WW/pdf/31FL3731.pdf) and the header file `drivers/led/issi/is31fl3731-mono.h`. The `driver` is the index of the driver you defined in your `config.h` (`0`, `1`, `2`, or `3` ).
---
### IS31FLCOMMON {#is31flcommon}
There is basic support for addressable LED matrix lighting with a selection of I2C ISSI Lumissil LED controllers through a shared common driver. To enable it, add this to your `rules.mk`:
```makefile
LED_MATRIX_ENABLE = yes
LED_MATRIX_DRIVER = <driver name>
```
Where `<driver name>` is the applicable LED driver chip as below
| Driver Name | Data Sheet | Capability |
|-------------|------------|------------|
| `IS31FL3742A` | [datasheet](https://www.lumissil.com/assets/pdf/core/IS31FL3742A_DS.pdf) | 180 LED, 30x6 Matrix |
| `IS31FL3743A` | [datasheet](https://www.lumissil.com/assets/pdf/core/IS31FL3743A_DS.pdf) | 198 LED, 18x11 Matrix |
| `IS31FL3745` | [datasheet](https://www.lumissil.com/assets/pdf/core/IS31FL3745_DS.pdf) | 144 LED, 18x8 Matrix |
| `IS31FL3746A` | [datasheet](https://www.lumissil.com/assets/pdf/core/IS31FL3746A_DS.pdf) | 72 LED, 18x4 Matrix |
You can use between 1 and 4 IC's. Do not specify `DRIVER_ADDR_<N>` define for IC's if not present on your keyboard. The `DRIVER_ADDR_1` default assumes that all Address pins on the controller have been connected to GND. Drivers that have SYNC functionality have the default settings to disable if 1 driver. If more than 1 drivers then `DRIVER_ADDR_1` will be set to Master and the remaiing ones set to Slave.
Configure the hardware via your `config.h`:
| Variable | Description | Default |
|----------|-------------|---------|
| `ISSI_TIMEOUT` | (Optional) How long to wait for i2c messages, in milliseconds | 100 |
| `ISSI_PERSISTENCE` | (Optional) Retry failed messages this many times | 0 |
| `LED_MATRIX_LED_COUNT` | (Required) How many LED lights are present across all drivers | |
| `DRIVER_ADDR_1` | (Optional) Address for the first LED driver | |
| `DRIVER_ADDR_<N>` | (Required) Address for the additional LED drivers | |
| `ISSI_SSR_<N>` | (Optional) Configuration for the Spread Spectrum Register | |
| `ISSI_CONFIGURATION` | (Optional) Configuration for the Configuration Register | |
| `ISSI_GLOBALCURRENT` | (Optional) Configuration for the Global Current Register | 0xFF |
| `ISSI_PULLDOWNUP` | (Optional) Configuration for the Pull Up & Pull Down Register | |
| `ISSI_TEMP` | (Optional) Configuration for the Tempature Register | |
| `ISSI_PWM_ENABLE` | (Optional) Configuration for the PWM Enable Register | |
| `ISSI_PWM_SET` | (Optional) Configuration for the PWM Setting Register | |
| `ISSI_SCAL_LED ` | (Optional) Configuration for the LEDs Scaling Registers | 0xFF |
| `ISSI_MANUAL_SCALING` | (Optional) If you wish to configure the Scaling Registers manually | |
Defaults
| Variable | IS31FL3742A | IS31FL3743A | IS31FL3745 | IS31FL3746 |
|----------|-------------|-------------|------------|------------|
| `DRIVER_ADDR_1` | 0b0110000 | 0b0100000 | 0b0100000 | 0b1100000 |
| `ISSI_SSR_1` | 0x00 | 0x00 / 0x60 | 0x00 / 0xC0 | 0x00 |
| `ISSI_SSR_<2-4>` | 0x00 | 0x40 | 0x80 | 0x00 |
| `ISSI_CONFIGURATION` | 0x31 | 0x01 | 0x31 | 0x01 |
| `ISSI_PULLDOWNUP` | 0x55 | 0x33 | 0x33 | 0x33 |
| `ISSI_TEMP` | N/A | 0x00 | 0x00 | 0x00 |
| `ISSI_PWM_ENABLE` | N/A | N/A | N/A | 0x00 |
| `ISSI_PWM_SET` | 0x00 | N/A | N/A | 0x00 |
Here is an example using 2 drivers.
```c
#define DRIVER_ADDR_2 0b0100001
#define DRIVER_1_LED_TOTAL 66
#define DRIVER_2_LED_TOTAL 42
#define LED_MATRIX_LED_COUNT (DRIVER_1_LED_TOTAL + DRIVER_2_LED_TOTAL)
```
::: warning
Note the parentheses, this is so when `LED_MATRIX_LED_COUNT` is used in code and expanded, the values are added together before any additional math is applied to them. As an example, `rand() % (DRIVER_1_LED_TOTAL + DRIVER_2_LED_TOTAL)` will give very different results than `rand() % DRIVER_1_LED_TOTAL + DRIVER_2_LED_TOTAL`.
:::
Currently only 4 drivers are supported, but it would be trivial to support for more. Note that using a combination of different drivers is not supported. All drivers must be of the same model.
Define these arrays listing all the LEDs in your `<keyboard>.c`:
```c
const is31_led PROGMEM g_is31_leds[LED_MATRIX_LED_COUNT] = {
/* Refer to IS31 manual for these locations
* driver
* | LED address
* | | */
{ 0, SW1_CS1 },
{ 0, SW1_CS2 },
// ...
}
```
Where `CSx_SWx` is the location of the LED in the matrix defined by the datasheet. The `driver` is the index of the driver you defined in your `config.h` (`0`, `1`, `2`, or `3` for now).
`ISSI_MANUAL_SCALING` is used to override the Scaling for individual LED's. By default they will be set as per `ISSI_SCAL_LED`. In `config.h` set how many LED's you want to manually set scaling for.
Eg `#define ISSI_MANUAL_SCALING 3`
Then Define the array listing all the LEDs you want to override in your `<keyboard>.c`:
```c
const is31_led PROGMEM g_is31_scaling[ISSI_MANUAL_SCALING] = {
/* LED Index
* | Scaling
* | | */
{5, 120},
{9, 120},
....
}
```
Where LED Index is the position of the LED in the `g_is31_leds` array. The `scaling` value between 0 and 255 to be written to the Scaling Register.
---
## Common Configuration {#common-configuration}
From this point forward the configuration is the same for all the drivers. The `led_config_t` struct provides a key electrical matrix to led index lookup table, what the physical position of each LED is on the board, and what type of key or usage the LED if the LED represents. Here is a brief example: