321 lines
12 KiB
Markdown
321 lines
12 KiB
Markdown
|
# IS31FL3745 Driver {#is31fl3745-driver}
|
||
|
|
|
||
|
|
I²C 18x8 LED matrix driver by Lumissil. Supports a maximum of four drivers, each controlling up to 144 single-color LEDs, or 48 RGB LEDs.
|
||
|
|
|
||
|
|
[IS31FL3745 Datasheet](https://www.lumissil.com/assets/pdf/core/IS31FL3745_DS.pdf)
|
||
|
|
|
||
|
|
## Usage {#usage}
|
||
|
|
|
||
|
|
The IS31FL3745 driver code is automatically included if you are using the [LED Matrix](../features/led_matrix) or [RGB Matrix](../features/rgb_matrix) feature with the `is31fl3745` driver set, and you would use those APIs instead.
|
||
|
|
|
||
|
|
However, if you need to use the driver standalone, add this to your `rules.mk`:
|
||
|
|
|
||
|
|
```make
|
||
|
|
COMMON_VPATH += $(DRIVER_PATH)/led/issi
|
||
|
|
SRC += is31fl3745-mono.c # For single-color
|
||
|
|
SRC += is31fl3745.c # For RGB
|
||
|
|
I2C_DRIVER_REQUIRED = yes
|
||
|
|
```
|
||
|
|
|
||
|
|
## Basic Configuration {#basic-configuration}
|
||
|
|
|
||
|
|
Add the following to your `config.h`:
|
||
|
|
|
||
|
|
|Define |Default |Description |
|
||
|
|
|----------------------------|------------------------------|----------------------------------------------------|
|
||
|
|
|`IS31FL3745_SDB_PIN` |*Not defined* |The GPIO pin connected to the drivers' shutdown pins|
|
||
|
|
|`IS31FL3745_I2C_TIMEOUT` |`100` |The I²C timeout in milliseconds |
|
||
|
|
|`IS31FL3745_I2C_PERSISTENCE`|`0` |The number of times to retry I²C transmissions |
|
||
|
|
|`IS31FL3745_I2C_ADDRESS_1` |*Not defined* |The I²C address of driver 0 |
|
||
|
|
|`IS31FL3745_I2C_ADDRESS_2` |*Not defined* |The I²C address of driver 1 |
|
||
|
|
|`IS31FL3745_I2C_ADDRESS_3` |*Not defined* |The I²C address of driver 2 |
|
||
|
|
|`IS31FL3745_I2C_ADDRESS_4` |*Not defined* |The I²C address of driver 3 |
|
||
|
|
|`IS31FL3745_SYNC_1` |`IS31FL3745_SYNC_NONE` |The sync configuration for driver 0 |
|
||
|
|
|`IS31FL3745_SYNC_2` |`IS31FL3745_SYNC_NONE` |The sync configuration for driver 1 |
|
||
|
|
|`IS31FL3745_SYNC_3` |`IS31FL3745_SYNC_NONE` |The sync configuration for driver 2 |
|
||
|
|
|`IS31FL3745_SYNC_4` |`IS31FL3745_SYNC_NONE` |The sync configuration for driver 3 |
|
||
|
|
|`IS31FL3745_CONFIGURATION` |`0x31` |The value of the configuration register |
|
||
|
|
|`IS31FL3745_SW_PULLDOWN` |`IS31FL3745_PDR_2K_OHM_SW_OFF`|The `SWx` pulldown resistor value |
|
||
|
|
|`IS31FL3745_CS_PULLUP` |`IS31FL3745_PUR_2K_OHM_CS_OFF`|The `CSx` pullup resistor value |
|
||
|
|
|`IS31FL3745_GLOBAL_CURRENT` |`0xFF` |The global current control value |
|
||
|
|
|
||
|
|
### I²C Addressing {#i2c-addressing}
|
||
|
|
|
||
|
|
The IS31FL3745 has 16 possible 7-bit I²C addresses, depending on how the `ADDR1` and `ADDR2` pins are connected.
|
||
|
|
|
||
|
|
To configure this, set the `IS31FL3745_I2C_ADDRESS_n` defines to one of the following in your `config.h`, where *n* denotes the driver index:
|
||
|
|
|
||
|
|
|Define |Value |
|
||
|
|
|--------------------------------|------|
|
||
|
|
|`IS31FL3745_I2C_ADDRESS_GND_GND`|`0x20`|
|
||
|
|
|`IS31FL3745_I2C_ADDRESS_GND_SCL`|`0x21`|
|
||
|
|
|`IS31FL3745_I2C_ADDRESS_GND_SDA`|`0x22`|
|
||
|
|
|`IS31FL3745_I2C_ADDRESS_GND_VCC`|`0x23`|
|
||
|
|
|`IS31FL3745_I2C_ADDRESS_SCL_GND`|`0x24`|
|
||
|
|
|`IS31FL3745_I2C_ADDRESS_SCL_SCL`|`0x25`|
|
||
|
|
|`IS31FL3745_I2C_ADDRESS_SCL_SDA`|`0x26`|
|
||
|
|
|`IS31FL3745_I2C_ADDRESS_SCL_VCC`|`0x27`|
|
||
|
|
|`IS31FL3745_I2C_ADDRESS_SDA_GND`|`0x28`|
|
||
|
|
|`IS31FL3745_I2C_ADDRESS_SDA_SCL`|`0x29`|
|
||
|
|
|`IS31FL3745_I2C_ADDRESS_SDA_SDA`|`0x2A`|
|
||
|
|
|`IS31FL3745_I2C_ADDRESS_SDA_VCC`|`0x2B`|
|
||
|
|
|`IS31FL3745_I2C_ADDRESS_VCC_GND`|`0x2C`|
|
||
|
|
|`IS31FL3745_I2C_ADDRESS_VCC_SCL`|`0x2D`|
|
||
|
|
|`IS31FL3745_I2C_ADDRESS_VCC_SDA`|`0x2E`|
|
||
|
|
|`IS31FL3745_I2C_ADDRESS_VCC_VCC`|`0x2F`|
|
||
|
|
|
||
|
|
### Multi-Driver Synchronization {#multi-driver-synchronization}
|
||
|
|
|
||
|
|
Multiple IS31FL3745 drivers can be synchronized by connecting the `SYNC` pins together. One driver must be designated as the "master", and the others configured as "slave".
|
||
|
|
|
||
|
|
To do this, set the `IS31FL3745_SYNC_n` defines accordingly in your `config.h`, where *n* denotes the driver index:
|
||
|
|
|
||
|
|
|Define |Value |
|
||
|
|
|------------------------|---------------------------|
|
||
|
|
|`IS31FL3745_SYNC_NONE` |No synchronization |
|
||
|
|
|`IS31FL3745_SYNC_MASTER`|Driver configured as master|
|
||
|
|
|`IS31FL3745_SYNC_SLAVE` |Driver configured as slave |
|
||
|
|
|
||
|
|
### De-Ghosting {#de-ghosting}
|
||
|
|
|
||
|
|
These settings control the pulldown and pullup resistor values on the `SWy` and `CSx` pins respectively, for the purposes of eliminating ghosting. Refer to the datasheet (p. 23) for more information on how and why this occurs.
|
||
|
|
|
||
|
|
To adjust the resistor values, add the following to your `config.h`:
|
||
|
|
|
||
|
|
```c
|
||
|
|
#define IS31FL3745_SW_PULLDOWN IS31FL3745_PDR_2K_OHM_SW_OFF
|
||
|
|
#define IS31FL3745_CS_PULLUP IS31FL3745_PUR_2K_OHM_CS_OFF
|
||
|
|
```
|
||
|
|
|
||
|
|
Valid values for `IS31FL3745_SW_PULLDOWN` are:
|
||
|
|
|
||
|
|
|Define |Resistance |
|
||
|
|
|-------------------------------|------------------------------|
|
||
|
|
|`IS31FL3745_PDR_0_OHM` |None (default) |
|
||
|
|
|`IS31FL3745_PDR_0K5_OHM_SW_OFF`|0.5 kΩ in SWx off time |
|
||
|
|
|`IS31FL3745_PDR_1K_OHM_SW_OFF` |1 kΩ in SWx off time |
|
||
|
|
|`IS31FL3745_PDR_2K_OHM_SW_OFF` |2 kΩ in SWx off time (default)|
|
||
|
|
|`IS31FL3745_PDR_1K_OHM` |1 kΩ |
|
||
|
|
|`IS31FL3745_PDR_2K_OHM` |2 kΩ |
|
||
|
|
|`IS31FL3745_PDR_4K_OHM` |4 kΩ |
|
||
|
|
|`IS31FL3745_PDR_8K_OHM` |8 kΩ |
|
||
|
|
|
||
|
|
Valid values for `IS31FL3745_CS_PULLUP` are:
|
||
|
|
|
||
|
|
|Define |Resistance |
|
||
|
|
|-------------------------------|------------------------------|
|
||
|
|
|`IS31FL3745_PUR_0_OHM` |None (default) |
|
||
|
|
|`IS31FL3745_PUR_0K5_OHM_CS_OFF`|0.5 kΩ in CSy off time |
|
||
|
|
|`IS31FL3745_PUR_1K_OHM_CS_OFF` |1 kΩ in CSy off time |
|
||
|
|
|`IS31FL3745_PUR_2K_OHM_CS_OFF` |2 kΩ in CSy off time (default)|
|
||
|
|
|`IS31FL3745_PUR_1K_OHM` |1 kΩ |
|
||
|
|
|`IS31FL3745_PUR_2K_OHM` |2 kΩ |
|
||
|
|
|`IS31FL3745_PUR_4K_OHM` |4 kΩ |
|
||
|
|
|`IS31FL3745_PUR_8K_OHM` |8 kΩ |
|
||
|
|
|
||
|
|
### Global Current Control {#global-current-control}
|
||
|
|
|
||
|
|
This setting controls the current sunk by the `CSy` pins, from 0 to 255. By default, the value is the maximum (255), but if you need to lower it, add the following to your `config.h`:
|
||
|
|
|
||
|
|
```c
|
||
|
|
#define IS31FL3745_GLOBAL_CURRENT 0xFF
|
||
|
|
```
|
||
|
|
|
||
|
|
## ARM/ChibiOS Configuration {#arm-configuration}
|
||
|
|
|
||
|
|
Depending on the ChibiOS board configuration, you may need to [enable and configure I²C](i2c#arm-configuration) at the keyboard level.
|
||
|
|
|
||
|
|
## LED Mapping {#led-mapping}
|
||
|
|
|
||
|
|
In order to use this driver, each output must be mapped to an LED index, by adding the following to your `<keyboardname>.c`:
|
||
|
|
|
||
|
|
```c
|
||
|
|
const is31fl3745_led_t PROGMEM g_is31fl3745_leds[IS31FL3745_LED_COUNT] = {
|
||
|
|
/* Driver
|
||
|
|
* | R G B */
|
||
|
|
{0, SW1_CS1, SW1_CS2, SW1_CS3},
|
||
|
|
// etc...
|
||
|
|
};
|
||
|
|
```
|
||
|
|
|
||
|
|
In this example, the red, green and blue channels for the first LED index on driver 0 all have their anodes connected to the `SW1` pin, and their cathodes on the `CS1`, `CS2` and `CS3` pins respectively.
|
||
|
|
|
||
|
|
For the single-color driver, the principle is the same, but there is only one channel:
|
||
|
|
|
||
|
|
```c
|
||
|
|
const is31fl3745_led_t PROGMEM g_is31fl3745_leds[IS31FL3745_LED_COUNT] = {
|
||
|
|
/* Driver
|
||
|
|
* | V */
|
||
|
|
{0, SW1_CS1},
|
||
|
|
// etc...
|
||
|
|
};
|
||
|
|
```
|
||
|
|
|
||
|
|
These values correspond to the register indices as shown in the datasheet on page 12, figure 9.
|
||
|
|
|
||
|
|
## API {#api}
|
||
|
|
|
||
|
|
### `struct is31fl3745_led_t` {#api-is31fl3745-led-t}
|
||
|
|
|
||
|
|
Contains the PWM register addresses for a single RGB LED.
|
||
|
|
|
||
|
|
#### Members {#api-is31fl3745-led-t-members}
|
||
|
|
|
||
|
|
- `uint8_t driver`
|
||
|
|
The driver index of the LED, from 0 to 3.
|
||
|
|
- `uint8_t r`
|
||
|
|
The output PWM register address for the LED's red channel (RGB driver only).
|
||
|
|
- `uint8_t g`
|
||
|
|
The output PWM register address for the LED's green channel (RGB driver only).
|
||
|
|
- `uint8_t b`
|
||
|
|
The output PWM register address for the LED's blue channel (RGB driver only).
|
||
|
|
- `uint8_t v`
|
||
|
|
The output PWM register address for the LED (single-color driver only).
|
||
|
|
|
||
|
|
---
|
||
|
|
|
||
|
|
### `void is31fl3745_init(uint8_t index)` {#api-is31fl3745-init}
|
||
|
|
|
||
|
|
Initialize the LED driver. This function should be called first.
|
||
|
|
|
||
|
|
#### Arguments {#api-is31fl3745-init-arguments}
|
||
|
|
|
||
|
|
- `uint8_t index`
|
||
|
|
The driver index.
|
||
|
|
|
||
|
|
---
|
||
|
|
|
||
|
|
### `void is31fl3745_write_register(uint8_t index, uint8_t reg, uint8_t data)` {#api-is31fl3745-write-register}
|
||
|
|
|
||
|
|
Set the value of the given register.
|
||
|
|
|
||
|
|
#### Arguments {#api-is31fl3745-write-register-arguments}
|
||
|
|
|
||
|
|
- `uint8_t index`
|
||
|
|
The driver index.
|
||
|
|
- `uint8_t reg`
|
||
|
|
The register address.
|
||
|
|
- `uint8_t data`
|
||
|
|
The value to set.
|
||
|
|
|
||
|
|
---
|
||
|
|
|
||
|
|
### `void is31fl3745_select_page(uint8_t index, uint8_t page)` {#api-is31fl3745-select-page}
|
||
|
|
|
||
|
|
Change the current page for configuring the LED driver.
|
||
|
|
|
||
|
|
#### Arguments {#api-is31fl3745-select-page-arguments}
|
||
|
|
|
||
|
|
- `uint8_t index`
|
||
|
|
The driver index.
|
||
|
|
- `uint8_t page`
|
||
|
|
The page number to select.
|
||
|
|
|
||
|
|
---
|
||
|
|
|
||
|
|
### `void is31fl3745_set_color(int index, uint8_t red, uint8_t green, uint8_t blue)` {#api-is31fl3745-set-color}
|
||
|
|
|
||
|
|
Set the color of a single LED (RGB driver only). This function does not immediately update the LEDs; call `is31fl3745_update_pwm_buffers()` after you are finished.
|
||
|
|
|
||
|
|
#### Arguments {#api-is31fl3745-set-color-arguments}
|
||
|
|
|
||
|
|
- `int index`
|
||
|
|
The LED index (ie. the index into the `g_is31fl3745_leds` array).
|
||
|
|
- `uint8_t red`
|
||
|
|
The red value to set.
|
||
|
|
- `uint8_t green`
|
||
|
|
The green value to set.
|
||
|
|
- `uint8_t blue`
|
||
|
|
The blue value to set.
|
||
|
|
|
||
|
|
---
|
||
|
|
|
||
|
|
### `void is31fl3745_set_color_all(uint8_t red, uint8_t green, uint8_t blue)` {#api-is31fl3745-set-color-all}
|
||
|
|
|
||
|
|
Set the color of all LEDs (RGB driver only).
|
||
|
|
|
||
|
|
#### Arguments {#api-is31fl3745-set-color-all-arguments}
|
||
|
|
|
||
|
|
- `uint8_t red`
|
||
|
|
The red value to set.
|
||
|
|
- `uint8_t green`
|
||
|
|
The green value to set.
|
||
|
|
- `uint8_t blue`
|
||
|
|
The blue value to set.
|
||
|
|
|
||
|
|
---
|
||
|
|
|
||
|
|
### `void is31fl3745_set_value(int index, uint8_t value)` {#api-is31fl3745-set-value}
|
||
|
|
|
||
|
|
Set the brightness of a single LED (single-color driver only). This function does not immediately update the LEDs; call `is31fl3745_update_pwm_buffers()` after you are finished.
|
||
|
|
|
||
|
|
#### Arguments {#api-is31fl3745-set-value-arguments}
|
||
|
|
|
||
|
|
- `int index`
|
||
|
|
The LED index (ie. the index into the `g_is31fl3745_leds` array).
|
||
|
|
- `uint8_t value`
|
||
|
|
The brightness value to set.
|
||
|
|
|
||
|
|
---
|
||
|
|
|
||
|
|
### `void is31fl3745_set_value_all(uint8_t value)` {#api-is31fl3745-set-value-all}
|
||
|
|
|
||
|
|
Set the brightness of all LEDs (single-color driver only).
|
||
|
|
|
||
|
|
#### Arguments {#api-is31fl3745-set-value-all-arguments}
|
||
|
|
|
||
|
|
- `uint8_t value`
|
||
|
|
The brightness value to set.
|
||
|
|
|
||
|
|
---
|
||
|
|
|
||
|
|
### `void is31fl3745_set_scaling_register(uint8_t index, uint8_t red, uint8_t green, uint8_t blue)` {#api-is31fl3745-set-scaling-register-rgb}
|
||
|
|
|
||
|
|
Configure the scaling registers for a single LED (RGB driver only). This function does not immediately update the LEDs; call `is31fl3745_update_scaling_registers()` after you are finished.
|
||
|
|
|
||
|
|
#### Arguments {#api-is31fl3745-set-scaling-register-rgb-arguments}
|
||
|
|
|
||
|
|
- `uint8_t index`
|
||
|
|
The LED index (ie. the index into the `g_is31fl3745_leds` array).
|
||
|
|
- `uint8_t red`
|
||
|
|
The scaling value for the red channel.
|
||
|
|
- `uint8_t green`
|
||
|
|
The scaling value for the green channel.
|
||
|
|
- `uint8_t blue`
|
||
|
|
The scaling value for the blue channel.
|
||
|
|
|
||
|
|
---
|
||
|
|
|
||
|
|
### `void is31fl3745_set_scaling_register(uint8_t index, uint8_t value)` {#api-is31fl3745-set-scaling-register-mono}
|
||
|
|
|
||
|
|
Configure the scaling register for a single LED (single-color driver only). This function does not immediately update the LEDs; call `is31fl3745_update_scaling_registers()` after you are finished.
|
||
|
|
|
||
|
|
#### Arguments {#api-is31fl3745-set-scaling-register-mono-arguments}
|
||
|
|
|
||
|
|
- `uint8_t index`
|
||
|
|
The LED index (ie. the index into the `g_is31fl3745_leds` array).
|
||
|
|
- `uint8_t value`
|
||
|
|
The scaling value for the LED.
|
||
|
|
|
||
|
|
---
|
||
|
|
|
||
|
|
### `void is31fl3745_update_pwm_buffers(uint8_t index)` {#api-is31fl3745-update-pwm-buffers}
|
||
|
|
|
||
|
|
Flush the PWM values to the LED driver.
|
||
|
|
|
||
|
|
#### Arguments {#api-is31fl3745-update-pwm-buffers-arguments}
|
||
|
|
|
||
|
|
- `uint8_t index`
|
||
|
|
The driver index.
|
||
|
|
|
||
|
|
---
|
||
|
|
|
||
|
|
### `void is31fl3745_update_scaling_registers(uint8_t index)` {#api-is31fl3745-update-scaling-registers}
|
||
|
|
|
||
|
|
Flush the scaling register values to the LED driver.
|
||
|
|
|
||
|
|
#### Arguments {#api-is31fl3745-update-scaling-registers-arguments}
|
||
|
|
|
||
|
|
- `uint8_t index`
|
||
|
|
The driver index.
|