251 lines
6.1 KiB
C
251 lines
6.1 KiB
C
/*
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Copyright 2016 Kai Ryu <kai1103@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <avr/pgmspace.h>
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#include <avr/eeprom.h>
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#include "softpwm_led.h"
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#include "backlight.h"
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#include "rgb.h"
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#include "light_ws2812.h"
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#include "debug.h"
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#ifdef RGB_LED_ENABLE
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volatile static uint8_t rgb_fading_enable = 0;
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static rgb_config_t rgb_config;
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static struct cRGB rgb_color[RGB_LED_COUNT];
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static uint16_t rgb_hue = 0;
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static uint8_t rgb_saturation = 255;
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static uint8_t rgb_brightness = 16;
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static uint8_t rgb_rainbow = 0;
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extern backlight_config_t backlight_config;
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extern uint8_t backlight_brightness;
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static void rgb_write_config(void);
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static void rgb_read_config(void);
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static void rgb_set_level(uint8_t level);
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static void rgb_refresh(void);
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#if 0
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static void hue_to_rgb(uint16_t hue, struct cRGB *rgb);
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#endif
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static void hsb_to_rgb(uint16_t hue, uint8_t saturation, uint8_t brightness, struct cRGB *rgb);
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void rgb_init(void)
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{
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rgb_read_config();
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if (rgb_config.raw == RGB_UNCONFIGURED) {
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rgb_config.enable = 0;
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rgb_config.level = RGB_OFF;
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rgb_write_config();
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}
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if (rgb_config.enable) {
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rgb_set_level(rgb_config.level);
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}
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}
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void rgb_read_config(void)
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{
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rgb_config.raw = eeprom_read_byte(EECONFIG_RGB);
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}
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void rgb_write_config(void)
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{
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eeprom_update_byte(EECONFIG_RGB, rgb_config.raw);
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}
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void rgb_toggle(void)
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{
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if (rgb_config.enable) {
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rgb_off();
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}
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else {
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rgb_on();
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}
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}
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void rgb_on(void)
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{
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rgb_config.enable = 1;
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rgb_set_level(rgb_config.level);
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rgb_write_config();
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}
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void rgb_off(void)
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{
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rgb_config.enable = 0;
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rgb_set_level(RGB_OFF);
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rgb_write_config();
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}
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void rgb_decrease(void)
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{
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if(rgb_config.level > 0) {
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rgb_config.level--;
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rgb_config.enable = (rgb_config.level != 0);
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rgb_write_config();
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}
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rgb_set_level(rgb_config.level);
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}
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void rgb_increase(void)
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{
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if(rgb_config.level < RGB_LEVELS) {
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rgb_config.level++;
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rgb_config.enable = 1;
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rgb_write_config();
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}
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rgb_set_level(rgb_config.level);
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}
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void rgb_step(void)
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{
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rgb_config.level++;
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if(rgb_config.level > RGB_LEVELS)
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{
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rgb_config.level = 0;
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}
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rgb_config.enable = (rgb_config.level != 0);
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rgb_write_config();
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rgb_set_level(rgb_config.level);
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}
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void rgb_set_level(uint8_t level)
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{
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dprintf("RGB Level: %d\n", level);
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if (level == RGB_OFF) {
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rgb_brightness = 0;
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}
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else if (backlight_config.enable) {
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if (backlight_config.level >= 1 && backlight_config.level <= 3) {
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rgb_brightness = backlight_brightness;
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}
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}
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else {
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rgb_brightness = 16;
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}
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if (level <= RGB_WHITE) {
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rgb_fading_enable = 0;
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rgb_rainbow = 0;
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if (level != RGB_OFF) {
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if (level == RGB_WHITE) {
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rgb_saturation = 0;
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}
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else {
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rgb_hue = (level - 1) * 128;
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rgb_saturation = 255;
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}
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if (backlight_config.enable) {
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if (backlight_config.level >= 1 && backlight_config.level <= 3) {
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rgb_brightness = backlight_brightness;
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}
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}
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else {
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rgb_brightness = 16;
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}
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}
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rgb_refresh();
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}
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else {
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rgb_saturation = 255;
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rgb_fading_enable = 1;
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rgb_rainbow = (level >= RGB_RAINBOW) ? 1 : 0;
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}
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}
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void rgb_set_brightness(uint8_t brightness)
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{
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if (rgb_config.enable) {
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rgb_brightness = brightness;
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rgb_refresh();
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}
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}
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void rgb_refresh(void)
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{
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struct cRGB rgb;
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uint16_t hue;
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uint8_t i;
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if (rgb_rainbow) {
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for (i = 0; i < RGB_LED_COUNT; i++) {
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hue = rgb_hue + (768 / RGB_LED_COUNT) * i;
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hsb_to_rgb(hue, rgb_saturation, rgb_brightness, &rgb);
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rgb_color[i] = rgb;
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}
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}
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else {
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hsb_to_rgb(rgb_hue, rgb_saturation, rgb_brightness, &rgb);
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for (i = 0; i < RGB_LED_COUNT; i++) {
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rgb_color[i] = rgb;
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}
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}
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/* xprintf("R%d G%d B%d\n", rgb_color[0].r, rgb_color[0].g, rgb_color[0].b); */
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ws2812_setleds(rgb_color, RGB_LED_COUNT);
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}
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#if 0
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void hue_to_rgb(uint16_t hue, struct cRGB *rgb)
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{
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uint8_t hi = hue / 60;
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uint16_t f = (hue % 60) * 425 / 100;
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uint8_t q = 255 - f;
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switch (hi) {
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case 0: rgb->r = 255; rgb->g = f; rgb->b = 0; break;
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case 1: rgb->r = q; rgb->g = 255; rgb->b = 0; break;
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case 2: rgb->r = 0; rgb->g = 255; rgb->b = f; break;
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case 3: rgb->r = 0; rgb->g = q; rgb->b = 255; break;
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case 4: rgb->r = f; rgb->g = 0; rgb->b = 255; break;
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case 5: rgb->r = 255; rgb->g = 0; rgb->b = q; break;
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}
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}
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#endif
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/*
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* original code: https://blog.adafruit.com/2012/03/14/constant-brightness-hsb-to-rgb-algorithm/
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*/
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void hsb_to_rgb(uint16_t hue, uint8_t saturation, uint8_t brightness, struct cRGB *rgb)
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{
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uint8_t temp[5];
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uint8_t n = (hue >> 8) % 3;
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uint8_t x = ((((hue & 255) * saturation) >> 8) * brightness) >> 8;
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uint8_t s = ((256 - saturation) * brightness) >> 8;
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temp[0] = temp[3] = s;
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temp[1] = temp[4] = x + s;
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temp[2] = brightness - x;
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rgb->r = temp[n + 2];
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rgb->g = temp[n + 1];
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rgb->b = temp[n];
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}
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void rgb_fading(void)
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{
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static uint8_t step = 0;
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static uint16_t hue = 0;
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if (rgb_fading_enable) {
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if (++step > rgb_fading_enable) {
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step = 0;
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rgb_hue = hue;
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rgb_refresh();
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if (++hue >= 768) {
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hue = 0;
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}
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}
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}
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}
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#endif
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