From ad49db8cd2557b6c54531059d4d162623520bd17 Mon Sep 17 00:00:00 2001 From: skullydazed Date: Tue, 17 Oct 2017 16:47:49 -0700 Subject: Address #1689 by using a formula to define the breathing curve (#1692) * Address #1689 by using a formula to define the breathing curve and exposing defines to control the shape of the curve. * Tweak the behavior of breathing for clueboard --- quantum/rgblight.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'quantum/rgblight.c') 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 . */ +#include #include #include #include @@ -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) { -- cgit v1.2.3