enum {
/* Operating modes */
MODE_SOLID = 0, /* Cycle through colors[][] before next mode */
- //MODE_CANDLE,
MODE_CYCLE, /* Auto cycle through colors */
MODE_PARTY, /* Random yet fast incolor and fade */
MODE_COUNT,
HELD_TMR_PERIODS = 1, /* Held timer fires every 32.768 msec */
HELD_PERIODS = 16, /* Held this long before held events fire */
- COLOR_WHITE = 0, /* Color index for white */
- COLOR_COUNT = 11,
+ COLOR_COUNT = 12,
+ COLOR_CANDLE = 0, /* Color index for white */
+ COLOR_WHITE = 11, /* Color index for white */
BRIGHT_TOP = 100, /* Bright ramps up to top ... */
BRIGHT_BOTTOM = -5, /* ... then down to bottom */
BRIGHT_MAX = 85, /* Bright values are constrained for computations */
BRIGHT_MIN = 1, /* ... by min and max. */
BRIGHT_INIT = 42, /* later, get from eeprom */
+ CBRIGHT_VARIANCE = 20, /* brightness range for candle flicker */
STD_FADE = 16, /* Fade time in 32.768 ms units */
STD_INCOLOR = 29491, /* Time in color when MODE_CYCLE, in 32.768 ms units */
PARTY_MIN = 8, /* Min party fade and incolor units */
signed char remainder;
} led_t;
+/* Offsets to brightness used for candle color */
+const signed char offsets[4] = { -1, -1, 1, 1 };
+
/* Available colors, 6 bits per color (no values above 0x3f) */
const unsigned char colors[COLOR_COUNT][LED_COUNT] = {
+ { 0x2c, 0x20, 0x00, 0x18 }, /* candle */
{ 0x28, 0x00, 0x00, 0x00 }, /* red */
{ 0x30, 0x20, 0x00, 0x00 }, /* orange */
{ 0x2c, 0x2c, 0x00, 0x00 }, /* yellow */
};
unsigned char mode = MODE_SOLID;
-unsigned char color = COLOR_WHITE;
+unsigned char color = COLOR_CANDLE;
signed char bright = BRIGHT_INIT;
bit bright_up;
led_t red;
bit on;
int fade_steps;
signed char pbHeldCount;
+signed char cbright;
void cfg_write()
{
{
signed char b;
- if (bright > BRIGHT_MAX)
- b = BRIGHT_MAX;
- else if (bright < BRIGHT_MIN)
- b = BRIGHT_MIN;
+ /* Use correct brightness value, then constrain it */
+ if (mode == MODE_SOLID && color == COLOR_CANDLE)
+ b = cbright;
else
b = bright;
+ if (b > BRIGHT_MAX)
+ b = BRIGHT_MAX;
+ else if (b < BRIGHT_MIN)
+ b = BRIGHT_MIN;
+
rgb_set(led_get((red).value, b), led_get((grn).value, b),
led_get((blu).value, b), led_get((wht).value, b));
}
wht.remainder = neww - (wht.value + wht.increment * fade_steps);
/* Start the fade timer */
+ tmr_stop(TMR_CANDLE);
tmr_stop(TMR_INCOLOR);
tmr_startPeriodic(TMR_FADE, 1); /* 32.768 msec */
}
{
/* Event on to off, either by switch or auto-off timer */
tmr_stop(TMR_CFG);
+ tmr_stop(TMR_CANDLE);
tmr_stop(TMR_INCOLOR);
tmr_stop(TMR_FADE);
rgb_off();
}
}
+void candle_task()
+{
+ /* Flicker by using the brightness value */
+ cbright += offsets[lfsr_get() & 0x03];
+
+ /* Constraight cbright to a range about bright */
+ if (cbright > bright)
+ cbright = bright;
+ else if (cbright < bright - CBRIGHT_VARIANCE)
+ cbright = bright - CBRIGHT_VARIANCE;
+
+ /* Adjust the LEDs */
+ leds_set();
+}
+
void fade_task()
{
red.value += red.increment;
grn.value += grn.remainder;
blu.value += blu.remainder;
wht.value += wht.remainder;
+ tmr_stop(TMR_CANDLE);
tmr_stop(TMR_FADE);
if (mode == MODE_CYCLE)
tmr_start(TMR_INCOLOR, STD_INCOLOR);
else if (mode == MODE_PARTY)
tmr_start(TMR_INCOLOR, PARTY_MIN + (lfsr_get() % PARTY_RANGE));
+ else if (mode == MODE_SOLID && color == COLOR_CANDLE) {
+ cbright = bright - CBRIGHT_VARIANCE / 2;
+ tmr_startPeriodic(TMR_CANDLE, 1);
+ }
}
leds_set();
}
case TASK_INCOLOR: /* in-color timer has fired */
start_fade();
break;
+ case TASK_CANDLE: /* periodic adjustment for candle flicker */
+ candle_task();
+ break;
case TASK_TMR32: /* auto on/off event */
auto_offon_task();
break;