#include "buttons.h"
#include "rgb.h"
-#define random_rgb() (rand() >> 7) /* 0...255 */
-#define random_time() (rand() >> 5) /* 0...1024 */
-#define min_incolor_time() 512
-#define min_fade_time() 512
+#define STEP_SIZE 32 /* ms */
+#define reset_steps() do { incolor_steps = 1; fade_steps = 0; } \
+ while (0)
+#define rand_u8() (rand() & 0xff)
+#define rand_u16() ((rand() << 8) + rand_u8())
+#define rand_incolor_steps(f) (min_incolor_steps[f] + \
+ (rand() % range_incolor_steps[f]))
+#define rand_fade_steps(f) (min_fade_steps[f] + \
+ (rand() % range_fade_steps[f]))
+#define leds_set(r,g,b,w) rgb_set((r).value >> 7, \
+ (g).value >> 7, \
+ (b).value >> 7, 0)
+// (w).value >> 7)
+
+typedef struct {
+ int value;
+ int increment;
+ char remainder;
+} led_t;
+#define INIT_LED { 0, 0, 0 }
+
+/* The index of all step arrays is the fast variable, 0=slow, 1=fast. */
+#if 0
+const static unsigned min_incolor_steps[2] = { 320, 32 };
+const static unsigned range_incolor_steps[2] = { 32768, 128 };
+const static int min_fade_steps[2] = { 64, 32 };
+const static int range_fade_steps[2] = { 416, 128 };
+#else
+const static unsigned min_incolor_steps[2] = { 64, 64 };
+const static unsigned range_incolor_steps[2] = { 1, 1 };
+const static int min_fade_steps[2] = { 32, 32 };
+const static int range_fade_steps[2] = { 1, 1 };
+#endif
int main(void)
{
- unsigned char red = 0, grn = 0, blu = 0; //, wht = 0;
- char fadestep_red, fadestep_grn, fadestep_blu; //, fadestep_wht;
- unsigned char incolor_time = 0;
- unsigned char 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;
+ int fade_steps;
pic_init();
buttons_init();
rgb_init();
- srand(27);
+ reset_steps();
if (buttons_on())
rgb_on();
if ((buttons & (IN_ROCKERA | IN_ROCKERB))) {
if (buttons & IN_PUSHBTN) {
if (!fast) {
- incolor_time = 0;
- fade_time = 0;
fast = 1;
+ reset_steps();
} else
fast = 0;
}
- if (fade_time) {
- red += fadestep_red;
- grn += fadestep_grn;
- blu += fadestep_blu;
- //wht += fadestep_wht;
- rgb_set(red, grn, blu, 0); // wht);
- fade_time--;
- } else if (incolor_time)
- incolor_time--;
- else /* fade_time == 0 && incolor_time == 0 */ {
- unsigned char 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) {
+ int newr, newg, newb, neww, tmp;
- if (fast) {
- incolor_time = 1 + incolor_time / 8;
- fade_time = 1 + fade_time / 8;
- }
+ /* Next led color. All off is not a valid option.
+ * RGB values are stored and processed as 15-bit non-negative
+ * integers. Since the RGB pwm values are 8 bits in width,
+ * leds_set() uses >> 7 to convert each color's value.
+ */
+ do {
+ newr = rand();
+ newg = rand();
+ newb = rand();
+ neww = rand();
+ } while (newr == 0 && newg == 0 && newb == 0 && neww == 0);
+
+ /* Next incolor and fade steps */
+ incolor_steps = rand_incolor_steps(fast);
+ fade_steps = (buttons & IN_ROCKERA) ? 1 : rand_fade_steps(fast);
- fadestep_red = ((int)newr - red) / fade_time;
- fadestep_grn = ((int)newg - red) / fade_time;
- fadestep_blu = ((int)newb - red) / fade_time;
- //fadestep_wht = ((int)neww - red) / fade_time;
+ /* Compute increment and remainder for each led */
+ red.increment = (newr - red.value) / fade_steps;
+ red.remainder = newr - (red.value + red.increment * fade_steps);
+ grn.increment = (newg - grn.value) / fade_steps;
+ grn.remainder = newg - (grn.value + grn.increment * fade_steps);
+ blu.increment = (newb - blu.value) / fade_steps;
+ blu.remainder = newb - (blu.value + blu.increment * fade_steps);
+ wht.increment = (neww - wht.value) / fade_steps;
+ wht.remainder = neww - (wht.value + wht.increment * fade_steps);
}
- __delay_ms(10);
+ __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;
projects / rgblamp.git / blobdiff