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-rw-r--r--quantum/rgblight.c7
-rw-r--r--quantum/rgblight.h8
2 files changed, 14 insertions, 1 deletions
diff --git a/quantum/rgblight.c b/quantum/rgblight.c
index 0f02b9a64c..78072a61de 100644
--- a/quantum/rgblight.c
+++ b/quantum/rgblight.c
@@ -13,6 +13,7 @@
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+#include <math.h>
#include <avr/eeprom.h>
#include <avr/interrupt.h>
#include <util/delay.h>
@@ -465,13 +466,17 @@ void rgblight_task(void) {
void rgblight_effect_breathing(uint8_t interval) {
static uint8_t pos = 0;
static uint16_t last_timer = 0;
+ float val;
if (timer_elapsed(last_timer) < pgm_read_byte(&RGBLED_BREATHING_INTERVALS[interval])) {
return;
}
last_timer = timer_read();
- rgblight_sethsv_noeeprom(rgblight_config.hue, rgblight_config.sat, pgm_read_byte(&LED_BREATHING_TABLE[pos]));
+
+ // http://sean.voisen.org/blog/2011/10/breathing-led-with-arduino/
+ val = (exp(sin((pos/255.0)*M_PI)) - RGBLIGHT_EFFECT_BREATHE_CENTER/M_E)*(RGBLIGHT_EFFECT_BREATHE_MAX/(M_E-1/M_E));
+ rgblight_sethsv_noeeprom(rgblight_config.hue, rgblight_config.sat, val);
pos = (pos + 1) % 256;
}
void rgblight_effect_rainbow_mood(uint8_t interval) {
diff --git a/quantum/rgblight.h b/quantum/rgblight.h
index c1b3378b33..fb79ce6ded 100644
--- a/quantum/rgblight.h
+++ b/quantum/rgblight.h
@@ -22,6 +22,14 @@
#define RGBLIGHT_MODES 1
#endif
+#ifndef RGBLIGHT_EFFECT_BREATHE_CENTER
+#define RGBLIGHT_EFFECT_BREATHE_CENTER 1.85 // 1-2.7
+#endif
+
+#ifndef RGBLIGHT_EFFECT_BREATHE_MAX
+#define RGBLIGHT_EFFECT_BREATHE_MAX 255 // 0-255
+#endif
+
#ifndef RGBLIGHT_EFFECT_SNAKE_LENGTH
#define RGBLIGHT_EFFECT_SNAKE_LENGTH 4
#endif