+/*
+ * Copyright © 2011, 2012, Titanium Mirror, Inc..
+ * All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * - Neither the name of Titanium Mirror, Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
/*
* File: main.c
*
#include <stdlib.h>
#include "picinit.h"
#include "unused.h"
+#include "lfsr.h"
#include "btn.h"
#include "rgb.h"
#include "tmr.h"
#include "task.h"
#include "adc_random.h"
-#if 1
-#define AUTO_OFF_COUNT 1800U /* 1 hr in 2 sec units */
-#define AUTO_ON_COUNT 19800U /* 11 hrs in 2 sec units */
-#else
-#define AUTO_OFF_COUNT 9000U /* 5 hrs in 2 sec units */
-#define AUTO_ON_COUNT 34200U /* 19 hrs in 2 sec units */
-#endif
-#define leds_set(r,g,b,w) rgb_set((r).value >> 7, (g).value >> 7, \
- (b).value >> 7, 0)
-#define dbgpin_init() do { \
- /* Set RA2 as output low */ \
- RA2 = 0; \
- TRISA2 = 0; \
- } while (0)
+#define AUTO_OFF_COUNT 9000U /* 5 hrs in 2 sec units */
+#define AUTO_ON_COUNT 34200U /* 19 hrs in 2 sec units */
+#define dbgpin_init() do { \
+ /* Set RA2 as output low */ \
+ RA2 = 0; \
+ TRISA2 = 0; \
+ } while (0)
#define dbgpin_high() (RA2 = 1)
#define dbgpin_low() (RA2 = 0)
#define dbgpin_toggle() (RA2 = (LATA2 == 0) ? 1 : 0)
+enum {
+ /* Operating modes */
+ MODE_SOLID = 0, /* Cycle through colors[][] before next mode */
+ MODE_CYCLE, /* Auto cycle through colors */
+ MODE_PARTY, /* Random yet fast incolor and fade */
+ MODE_COUNT,
+
+ /* Indexes in colors[][] for LEDs */
+ LED_RED = 0,
+ LED_GRN,
+ LED_BLU,
+ LED_WHT,
+ LED_COUNT,
+
+ HELD_TMR_PERIODS = 1, /* Held timer fires every 32.768 msec */
+ HELD_PERIODS = 16, /* Held this long before held events fire */
+ COLOR_COUNT = 12,
+ COLOR_CANDLE = 0, /* Color index for the candle color */
+ 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, /* Initial value is replaced by value 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 */
+ PARTY_RANGE = 8, /* Party fade/incolor range mask for lfsr_get() */
+ /* ... see start_fade() */
+ CFG_ADDR = 0, /* EEPROM address of start of configuration */
+ CFG_DELAY = 183, /* 6 seconds in 32.768 msec units */
+};
+
typedef struct {
int value;
int increment;
signed char remainder;
} led_t;
-/* The index of all step arrays is the speed variable. min values must be
- * at least one. range values are bit-ANDed with rand() to generate a range, so
- * ensure they are one less than a power of 2 and at least 1.
- */
-const static unsigned min_incolor_steps[4] = { 320, 32, 32, 1 };
-const static unsigned range_incolor_steps[4] = { 32767, 127, 31, 7 };
-const static int min_fade_steps[4] = { 64, 32, 32, 8 };
-const static int range_fade_steps[4] = { 511, 127, 31, 7 };
+/* 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 */
+ { 0x20, 0x2c, 0x00, 0x00 }, /* yellow-green */
+ { 0x00, 0x30, 0x00, 0x00 }, /* green */
+ { 0x00, 0x30, 0x18, 0x00 }, /* green-cyan */
+ { 0x00, 0x30, 0x28, 0x00 }, /* cyan */
+ { 0x00, 0x18, 0x30, 0x00 }, /* cyan-blue */
+ { 0x00, 0x00, 0x30, 0x00 }, /* blue */
+ { 0x1c, 0x00, 0x30, 0x00 }, /* magenta */
+ { 0x3f, 0x3f, 0x3f, 0x3f }, /* white */
+};
+
+unsigned char mode = MODE_SOLID;
+unsigned char color = COLOR_CANDLE;
+signed char bright = BRIGHT_INIT;
+bit bright_up;
led_t red;
led_t grn;
led_t blu;
led_t wht;
bit on;
-unsigned char speed;
int fade_steps;
+signed char pbHeldCount;
+signed char cbright;
+
+void cfg_write()
+{
+ unsigned char addr = CFG_ADDR;
+ unsigned char m, c;
+ signed char b;
+
+ m = eeprom_read(addr++);
+ c = eeprom_read(addr++);
+ b = eeprom_read(addr);
+ if (mode != m || color != c || bright != b) {
+ addr = CFG_ADDR;
+ eeprom_write(addr++, mode);
+ eeprom_write(addr++, color);
+ eeprom_write(addr, bright);
+ }
+}
+
+void cfg_read()
+{
+ unsigned char addr = CFG_ADDR;
+ unsigned char tmp;
+
+ tmp = eeprom_read(addr++);
+ if (tmp < MODE_COUNT)
+ mode = tmp;
+
+ tmp = eeprom_read(addr++);
+ if (tmp < COLOR_COUNT)
+ color = tmp;
+
+ tmp = eeprom_read(addr);
+ if ((signed char)tmp >= BRIGHT_BOTTOM && (signed char)tmp <= BRIGHT_TOP)
+ bright = tmp;
+}
+
+/* Combine LED color value and brightness level to generate an RGB value.
+ * bright will be BRIGHT_MIN...BRIGHT_MAX
+ *
+ * @param value 0...1023 (6 bit color, left shifted 4 bits, for 10 bits)
+ * @param b brightness value BRIGHT_MIN...BRIGHT_MAX
+ * @return An RGB drive value, 0...255
+ */
+unsigned char led_get(int value, signed char b)
+{
+ return (unsigned long)value * b / 4 / BRIGHT_MAX;
+}
+
+/* Set the LEDs using color values and current brightness. */
+void leds_set()
+{
+ signed char b;
+
+ /* Use correct brightness value, then constrain it */
+ if (mode != MODE_PARTY && color != COLOR_WHITE)
+ 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));
+}
void start_fade()
{
- /* RGB PWM values are 8 bits, but computations are done in 15
- * (leaving room for a sign bit), so leds_set() uses >>7 to convert
- * to PWM values.
- */
+ /* RGB PWM values are 8 bits. Color values are 12 bits. See led_get()
+ * for the conversion of color values and brightness to RGB values.
+ */
int newr, newg, newb, neww;
- /* New RGB values; all zero is not a valid option */
- do {
- newr = rand();
- newg = rand();
- newb = rand();
- neww = rand();
- } while (newr == 0 && newg == 0 && newb == 0 && neww == 0);
+ /* Select the destination color and fade-to time depending upon mode. */
+ fade_steps = STD_FADE;
+ if (mode == MODE_PARTY) {
+ color = lfsr_get() % COLOR_COUNT;
+ fade_steps = PARTY_MIN + (lfsr_get() % PARTY_RANGE);
+ } else if (mode == MODE_CYCLE) {
+ if (++color == COLOR_COUNT)
+ color = 0;
+ }
- /* Random # of steps to reach the new color */
- fade_steps = min_fade_steps[speed & 3] +
- (rand() & range_fade_steps[speed & 3]);
+ /* Retrieve the destination color */
+ newr = colors[color][LED_RED] << 4;
+ newg = colors[color][LED_GRN] << 4;
+ newb = colors[color][LED_BLU] << 4;
+ neww = colors[color][LED_WHT] << 4;
/* Compute increment per fade step, and remainder, for each led */
red.increment = (newr - red.value) / fade_steps;
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 */
}
{
dbgpin_high();
on = 1;
- red.value = 0;
- grn.value = 0;
- blu.value = 0;
- wht.value = 0;
- leds_set(red, grn, blu, wht);
rgb_on();
start_fade();
btn_pben();
}
+/* Event on to off, either by switch or auto-off timer */
void turnOff()
{
- /* 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();
+ red.value = grn.value = blu.value = wht.value = 0;
+ on = 0;
dbgpin_low();
SLEEP();
- on = 0;
}
-void pb_task()
+void pb_clicked()
{
- /* Is this task running nearly continuously? */
if (on) {
- if (btn_pb() == BTN_PB_UP) {
- speed = (speed + 1) & 3;
- start_fade();
+ if (mode == MODE_SOLID) {
+ if (++color == COLOR_COUNT) {
+ color = 0;
+ if (++mode == MODE_COUNT)
+ mode = 0;
+ }
+ } else if (++mode == MODE_COUNT) {
+ mode = 0;
+ color = 0;
+ }
+ tmr_start(TMR_CFG, CFG_DELAY);
+ start_fade();
+ }
+}
+
+/* The button is being held. Change the color magnitude. */
+void pb_held()
+{
+ if (bright_up) {
+ if (bright == BRIGHT_TOP)
+ bright_up = 0;
+ else
+ bright++;
+ } else {
+ if (bright == BRIGHT_BOTTOM)
+ bright_up = 1;
+ else
+ bright--;
+ }
+ tmr_start(TMR_CFG, CFG_DELAY);
+ leds_set();
+}
+
+void pb_held_task()
+{
+ pbHeldCount++;
+ if (pbHeldCount >= 0) {
+ pbHeldCount = 0;
+ pb_held();
+ }
+}
+
+void pb_task()
+{
+ static unsigned char pbPrev = BTN_PB_UP;
+ unsigned char pb;
+
+ pb = btn_pb();
+ if (pbPrev == BTN_PB_UP) {
+ if (pb == BTN_PB_UP)
+ pb_clicked();
+ else /* (pb == BTN_PB_DOWN) */ {
+ tmr_startPeriodic(TMR_BTN_PB_HELD, HELD_TMR_PERIODS);
+ pbHeldCount = -HELD_PERIODS;
}
- btn_pben();
+ } else /* if (pbPrev == BTN_PB_DOWN) */ {
+ if (pb == BTN_PB_UP) {
+ tmr_stop(TMR_BTN_PB_HELD);
+ if (pbHeldCount < 0)
+ pb_clicked();
+ } /* nothing to do if button is down */
}
+ pbPrev = pb;
+ btn_pben();
}
void rs_task()
}
}
+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);
- tmr_start(TMR_INCOLOR, min_incolor_steps[speed & 3] +
- (rand() & range_incolor_steps[speed & 3]));
+ if (mode == MODE_PARTY)
+ tmr_start(TMR_INCOLOR, PARTY_MIN + (lfsr_get() % PARTY_RANGE));
+ else {
+ if (mode == MODE_CYCLE)
+ tmr_start(TMR_INCOLOR, STD_INCOLOR);
+ if (color != COLOR_WHITE) {
+ cbright = bright - CBRIGHT_VARIANCE / 2;
+ tmr_startPeriodic(TMR_CANDLE, 1);
+ }
+ }
}
- leds_set(red, grn, blu, wht);
+ leds_set();
}
void auto_offon_task()
void user_boot()
{
dbgpin_high();
- srand((adc_random() << 8) + adc_random());
+ lfsr_init((adc_random() << 8) + adc_random());
+ cfg_read();
rs_task();
}
while ((tid = task_get(block)) >= 0) {
switch (tid) {
- case TASK_BTN_PB: /* pushbutton state change */
+ case TASK_BTN_PB:
pb_task();
break;
- case TASK_BTN_RS: /* rocker switch state change */
+ case TASK_BTN_RS:
rs_task();
break;
- case TASK_FADE: /* fade timer has fired */
+ case TASK_BTN_PB_HELD:
+ pb_held_task();
+ break;
+ case TASK_FADE:
fade_task();
break;
- case TASK_INCOLOR: /* in-color timer has fired */
+ case TASK_INCOLOR:
start_fade();
break;
- case TASK_TMR32: /* auto on/off event */
+ case TASK_CANDLE:
+ candle_task();
+ break;
+ case TASK_TMR32:
auto_offon_task();
break;
+ case TASK_CFG:
+ cfg_write();
+ break;
}
}
}
projects / rgblamp.git / blobdiff