diff options
Diffstat (limited to 'quantum/rgblight.c')
| -rw-r--r-- | quantum/rgblight.c | 7 |
1 files changed, 6 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) { |