git.zerfleddert.de Git - fnordlicht-mini/blob - firmware/fnordlicht-firmware/pwm.h

   1 /* vim:ts=4 sts=4 et tw=80
   2  *
   3  *         fnordlicht firmware
   4  *
   5  *    for additional information please
   6  *    see http://lochraster.org/fnordlichtmini
   7  *
   8  * (c) by Alexander Neumann <alexander@bumpern.de>
   9  *     Lars Noschinski <lars@public.noschinski.de>
  10  *
  11  * This program is free software: you can redistribute it and/or modify it
  12  * under the terms of the GNU General Public License version 3 as published by
  13  * the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but WITHOUT
  16  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  17  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  18  * more details.
  19  *
  20  * You should have received a copy of the GNU General Public License along with
  21  * this program.  If not, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24 #ifndef PWM_H
  25 #define PWM_H
  26
  27 #include "timer.h"
  28 #include "color.h"
  29
  30 #if PWM_CHANNELS != 3
  31 #error "PWM_CHANNELS is not 3, this is unsupported!"
  32 #endif
  33
  34 #define PWM_HSV_SIZE sizeof(struct hsv_color_t)
  35
  36 struct global_pwm_t
  37 {
  38     /* current color */
  39     struct rgb_color_t current;
  40
  41     /* target for fading engine */
  42     struct dual_color_t target;
  43
  44     /* delay and step for fading engine */
  45     uint8_t fade_delay[PWM_CHANNELS];
  46     uint8_t fade_step[PWM_CHANNELS];
  47 };
  48
  49 extern struct global_pwm_t global_pwm;
  50
  51 /* prototypes */
  52 void pwm_init(void);
  53 void pwm_poll(void);
  54 void pwm_poll_fading(void);
  55
  56 void pwm_fade_rgb(struct rgb_color_t *color, uint8_t step, uint8_t delay);
  57 void pwm_fade_hsv(struct hsv_color_t *color, uint8_t step, uint8_t delay);
  58
  59 /* return true if fading process is complete */
  60 bool pwm_target_reached(void);
  61
  62 /* convert hsv to rgb color */
  63 void pwm_hsv2rgb(struct dual_color_t *color);
  64 /* convert rgb to hsv color */
  65 void pwm_rgb2hsv(struct dual_color_t *color);
  66
  67 /* stop fading, hold current color */
  68 void pwm_stop_fading(void);
  69
  70 /* modify color */
  71 void pwm_modify_rgb(struct rgb_color_offset_t *color, uint8_t step, uint8_t delay);
  72 void pwm_modify_hsv(struct hsv_color_offset_t *color, uint8_t step, uint8_t delay);
  73
  74 #endif