pattern.c

   1 #include "lights.h"
   2
   3 typedef struct {
   4         unsigned char mode: 3;
   5         unsigned char duration: 5;
   6 } pattern_t;
   7
   8 static unsigned char led_counters[N_LEDS];
   9 static pattern_t *led_patterns[N_LEDS];
  10
  11 #define PATTERN_END { 0, 0 }
  12 pattern_t off_pattern[] = {
  13         { 0, 5 },
  14         PATTERN_END
  15 };
  16
  17 pattern_t blink_pattern[] = {
  18         { 1, 5 },
  19         { 0, 5 },
  20         PATTERN_END
  21 };
  22
  23 void pattern_init()
  24 {
  25         unsigned char i;
  26
  27         for (i = 0; i < N_LEDS; i++) {
  28                 led_counters[i] = 0;
  29                 led_patterns[i] = off_pattern;
  30         }
  31 }
  32
  33 void patterns_next_tick()
  34 {
  35         unsigned char i;
  36
  37         for (i = 0; i < N_LEDS; i++) {
  38                 if (led_counters[i] == 0) {
  39                         led_patterns[i]++;
  40                         if (led_patterns[i]->duration == 0) { // END
  41                                 led_patterns[i] = pattern_select(i);
  42                         }
  43                         led_counters[i] = led_patterns[i]->duration;
  44                         if (led_patterns[i]->mode == 0) {
  45                                 led_off(i);
  46                         } else {
  47                                 led_set_level(i, led_patterns[i]->mode - 1);
  48                         }
  49                 }
  50
  51                 led_counters[i]--;
  52         }
  53 }
  54