#include "buttons.h"
#include "rgb.h"
-#define random_rgb() rand() /* ~ (0...255) << 7 */
-#define random_time() (rand() >> 7) /* 0...255 */
-#define min_incolor_time() 100
-#define min_fade_time() 100
+#define STEP_SIZE 64 /* ms */
+#define MIN_INCOLOR_STEPS 16
+#define MAX_INCOLOR_STEPS 57600
+#define MAX_FADE_STEPS 480
+#define reset_steps() do { incolor_steps = 1; fade_steps = 0; } while (0)
+#define rand_u8() (rand() >> 7)
+#define rand_u16() (rand() << 8 + rand() >> 7)
+#if 1
+#define rand_incolor_steps() MIN_INCOLOR_STEPS * 2
+#define rand_fade_steps() 16
+#else
+#define rand_incolor_steps() (MIN_INCOLOR_STEPS + rand_u16() % \
+ (MAX_INCOLOR_STEPS - MIN_INCOLOR_STEPS))
+#define rand_fade_steps() (1 + rand_u16() % MAX_FADE_STEPS)
+#endif
+#define leds_set(r,g,b,w) rgb_set((r).value >> 8, \
+ (g).value >> 8, \
+ (b).value >> 8, \
+ (w).value >> 8)
+
+typedef struct {
+ unsigned value;
+ unsigned increment;
+ unsigned char remainder;
+} led_t;
+#define INIT_LED { 0, 0, 0 }
int main(void)
{
- int red = 0, grn = 0, blu = 0; //, wht = 0;
- int fadestep_red, fadestep_grn, fadestep_blu; //, fadestep_wht;
- unsigned incolor_time = 0;
- unsigned fade_time = 0;
+ led_t red = INIT_LED;
+ led_t grn = INIT_LED;
+ led_t blu = INIT_LED;
+ led_t wht = INIT_LED;
unsigned char fast = 0;
+ unsigned incolor_steps;
+ unsigned fade_steps;
pic_init();
buttons_init();
rgb_init();
- srand(27);
+ reset_steps();
if (buttons_on())
rgb_on();
if (buttons & IN_PUSHBTN) {
if (!fast) {
fast = 1;
- incolor_time = 0;
- fade_time = 0;
+ reset_steps();
} else
fast = 0;
}
- if (fade_time) {
- red += fadestep_red;
- grn += fadestep_grn;
- blu += fadestep_blu;
- //wht += fadestep_wht;
- rgb_set(red >> 7, grn >> 7, blu >> 7, 0); // wht >> 7);
- fade_time--;
- } else if (incolor_time)
- incolor_time--;
- else /* fade_time == 0 && incolor_time == 0 */ {
- int newr, newg, newb, neww;
-
- /* Determine next color state */
- newr = random_rgb();
- newg = random_rgb();
- newb = random_rgb();
- //neww = random_rgb();
-
- /* Calculate new incolor_time and fade_time */
- if (buttons & IN_ROCKERA) {
- incolor_time = 1 + random_time();
- fade_time = 1;
- } else /* (buttons & IN_ROCKERB) */ {
- incolor_time = min_incolor_time() + random_time() / 2;
- fade_time = min_fade_time() + random_time() / 2;
+ if (fade_steps) {
+ fade_steps--;
+ /* Continue the in-progress fade */
+ red.value += red.increment;
+ grn.value += grn.increment;
+ blu.value += blu.increment;
+ wht.value += wht.increment;
+ if (fade_steps == 0) {
+ red.value += red.remainder;
+ grn.value += grn.remainder;
+ blu.value += blu.remainder;
+ wht.value += wht.remainder;
}
+ leds_set(red, grn, blu, wht);
+ } else if (--incolor_steps == 0) {
+ unsigned newr, newg, newb, neww;
+
+ /* Next led color. All off is not a valid option. */
+ do {
+ newr = rand() << 8;
+ newg = rand() << 8;
+ newb = rand() << 8;
+ neww = rand() << 8;
+ } while (newr == 0 && newg == 0 && newb == 0 && neww == 0);
+ /* Next incolor and fade steps */
+ incolor_steps = rand_incolor_steps();
+ fade_steps = (buttons & IN_ROCKERA) ? 1 : rand_fade_steps();
if (fast) {
- incolor_time = 1 + incolor_time / 8;
- fade_time = 1 + fade_time / 8;
+ incolor_steps = 1 + incolor_steps / 8;
+ if (buttons & IN_ROCKERB)
+ fade_steps = 1 + fade_steps / 8;
}
- fadestep_red = (newr - red) / fade_time;
- fadestep_grn = (newg - red) / fade_time;
- fadestep_blu = (newb - red) / fade_time;
- //fadestep_wht = (neww - red) / fade_time;
+ /* Compute increment and remainder for each led */
+ red.increment = newr / fade_steps;
+ red.remainder = newr - red.increment * fade_steps;
+ grn.increment = newg / fade_steps;
+ grn.remainder = newg - grn.increment * fade_steps;
+ blu.increment = newb / fade_steps;
+ blu.remainder = newb - blu.increment * fade_steps;
+ wht.increment = neww / fade_steps;
+ wht.remainder = neww - wht.increment * fade_steps;
}
- __delay_ms(50);
+ __delay_ms(STEP_SIZE); /* step should be start to start... */
} else {
rgb_off();
buttons_sleep();
- incolor_time = 0;
- fade_time = 0;
+ reset_steps();
rgb_on();
+ red.value = 0;
+ grn.value = 0;
+ blu.value = 0;
+ wht.value = 0;
}
}
return 0;