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Fix backlight breathing on C6 (#6102)

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* Fix backlight breathing on C6

* Account for ATmega32A's single TIMSK register (MT40)

* Document hardware PWM on D4 for ATmega32A

* Add C6 and D4 to BACKLIGHT_PIN description
This commit is contained in:
fauxpark 2019-06-18 12:37:17 +10:00 • committed by Drashna Jaelre
parent c6850bad74
commit 6bdcbfb25a
3 changed files with 38 additions and 27 deletions
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2
docs/config_options.md
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@ -76,7 +76,7 @@ This is a C header file that is one of the first things included, and will persi
* `#define B7_AUDIO`
* enables audio on pin B7 (duophony is enables if one of B[5-7]\_AUDIO is enabled along with one of C[4-6]\_AUDIO)
* `#define BACKLIGHT_PIN B7`
* pin of the backlight - B5, B6, B7 use PWM, others use softPWM
* pin of the backlight - `B5`, `B6`, `B7` and `C6` (and `D4` on ATmega32A) use hardware PWM, others use software implementation
* `#define BACKLIGHT_LEVELS 3`
* number of levels your backlight will have (maximum 15 excluding off)
* `#define BACKLIGHT_BREATHING`

15
docs/feature_backlight.md
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@ -34,13 +34,14 @@ Hardware PWM is only supported on certain pins of the MCU, so if the backlightin
Hardware PWM is supported according to the following table:
| Backlight Pin | Hardware timer |
|---------------|----------------|
|`B5` | Timer 1 |
|`B6` | Timer 1 |
|`B7` | Timer 1 |
|`C6` | Timer 3 |
| other | Software PWM |
| Backlight Pin | Hardware timer |
|---------------|-------------------------|
|`B5` | Timer 1 |
|`B6` | Timer 1 |
|`B7` | Timer 1 |
|`C6` | Timer 3 |
|`D4` | Timer 1 (ATmega32A only)|
| other | Software PWM |
The [audio feature](feature_audio.md) also uses hardware timers. Please refer to the following table to know what hardware timer the software PWM will use depending on the audio configuration: