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refactor(backlight): code cleanup

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This commit is contained in:
Alessandro Bortolin
2021-12-20 11:00:22 +01:00
committed by Pete Johanson
parent 5614a8bb80
commit ce843825e8
7 changed files with 67 additions and 133 deletions
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docs/docs/features/backlight.md
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@@ -24,7 +24,7 @@ There are various Kconfig options used to configure the backlight feature. These
| `CONFIG_ZMK_BACKLIGHT_BRT_STEP` | Brightness step in percent | 20 |
| `CONFIG_ZMK_BACKLIGHT_BRT_START` | Default brightness in percent | 40 |
| `CONFIG_ZMK_BACKLIGHT_ON_START` | Default backlight state | y |
| `CONFIG_ZMK_BACKLIGHT_AUTO_OFF_IDLE` | Turn off backlight when keyboard goes into idle state | y |
| `CONFIG_ZMK_BACKLIGHT_AUTO_OFF_IDLE` | Turn off backlight when keyboard goes into idle state | n |
| `CONFIG_ZMK_BACKLIGHT_AUTO_OFF_USB` | Turn off backlight when USB is disconnected | n |
## Adding Backlight to a Board
@@ -43,7 +43,7 @@ First, you need to enable PWM by adding the following lines to your `.overlay` f
};
```
The value `ch0-pin` represents the pin that controls the LEDs. To calculate the value to use, you need a bit of math. You need the hardware port and run it through a function.
The value `ch0-pin` represents the pin that controls the LEDs. With nRF52 boards, you can calculate the value to use in the following way: you need the hardware port and run it through a function.
**32 \* X + Y** = `<Pin number>` where X is first part of the hardware port "PX.01" and Y is the second part of the hardware port "P1.Y".
For example, _P1.13_ would give you _32 \* 1 + 13_ = `<45>` and _P0.15_ would give you _32 \* 0 + 15_ = `<15>`.