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-rw-r--r--docs/feature_backlight.md2
-rw-r--r--tmk_core/common/backlight.h7
2 files changed, 5 insertions, 4 deletions
diff --git a/docs/feature_backlight.md b/docs/feature_backlight.md
index b06db89e4d..26a5078ca0 100644
--- a/docs/feature_backlight.md
+++ b/docs/feature_backlight.md
@@ -65,7 +65,7 @@ To change the behaviour of the backlighting, `#define` these in your `config.h`:
|---------------------|-------------|-------------------------------------------------------------------------------------------------------------|
|`BACKLIGHT_PIN` |`B7` |The pin that controls the LEDs. Unless you are designing your own keyboard, you shouldn't need to change this|
|`BACKLIGHT_PINS` |*Not defined*|experimental: see below for more information |
-|`BACKLIGHT_LEVELS` |`3` |The number of brightness levels (maximum 15 excluding off) |
+|`BACKLIGHT_LEVELS` |`3` |The number of brightness levels (maximum 31 excluding off) |
|`BACKLIGHT_CAPS_LOCK`|*Not defined*|Enable Caps Lock indicator using backlight (for keyboards without dedicated LED) |
|`BACKLIGHT_BREATHING`|*Not defined*|Enable backlight breathing, if supported |
|`BREATHING_PERIOD` |`6` |The length of one backlight "breath" in seconds |
diff --git a/tmk_core/common/backlight.h b/tmk_core/common/backlight.h
index cc56fb9af0..0a38771206 100644
--- a/tmk_core/common/backlight.h
+++ b/tmk_core/common/backlight.h
@@ -22,8 +22,8 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#ifndef BACKLIGHT_LEVELS
#define BACKLIGHT_LEVELS 3
-#elif BACKLIGHT_LEVELS > 15
- #error "Maximum value of BACKLIGHT_LEVELS is 15"
+#elif BACKLIGHT_LEVELS > 31
+ #error "Maximum value of BACKLIGHT_LEVELS is 31"
#endif
typedef union {
@@ -31,7 +31,8 @@ typedef union {
struct {
bool enable :1;
bool breathing :1;
- uint8_t level :4;
+ uint8_t reserved :1; // Reserved for possible future backlight modes
+ uint8_t level :5;
};
} backlight_config_t;