#include <stdlib.h>
#include "picinit.h"
#include "unused.h"
+#include "lfsr.h"
#include "btn.h"
#include "rgb.h"
#include "tmr.h"
#define dbgpin_low() (RA2 = 0)
#define dbgpin_toggle() (RA2 = (LATA2 == 0) ? 1 : 0)
-#define cfg_write(mode, color) do { \
- eeprom_write(CFG_MODE_ADDR, (mode)); \
- eeprom_write(CFG_COLOR_ADDR, (color)); \
- } while (0)
-
-#define cfg_read(mode, color) do { \
- unsigned char tmp; \
- tmp = eeprom_read(CFG_MODE_ADDR); \
- mode = (tmp < MODE_COUNT) ? tmp : MODE_SOLID; \
- tmp = eeprom_read(CFG_COLOR_ADDR); \
- color = (tmp < COLOR_COUNT) ? tmp : 0; \
- } while (0)
-
enum {
/* Operating modes */
MODE_SOLID = 0, /* Cycle through colors[][] before next mode */
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 rand() */
+ PARTY_RANGE = 8, /* Party fade/incolor range mask for lfsr_get() */
/* ... see start_fade() */
- CFG_MODE_ADDR = 0, /* EEPROM address of mode variable */
- CFG_COLOR_ADDR, /* EEPROM address of color variable */
- CFG_DELAY = 92, /* 3 seconds in 32.768 msec units */
+ CFG_ADDR = 0, /* EEPROM address of start of configuration */
+ CFG_DELAY = 183, /* 6 seconds in 32.768 msec units */
};
typedef struct {
unsigned char mode = MODE_SOLID;
unsigned char color = COLOR_WHITE;
+signed char bright = BRIGHT_INIT;
+bit bright_up;
led_t red;
led_t grn;
led_t blu;
led_t wht;
bit on;
int fade_steps;
-signed char bright = BRIGHT_INIT;
-bit bright_up;
signed char pbHeldCount;
-/* Return the constrained brightness level for use in computing RGB values */
-unsigned char bright_get()
+void cfg_write()
{
- if (bright > BRIGHT_MAX)
- return BRIGHT_MAX;
- else if (bright < BRIGHT_MIN)
- return BRIGHT_MIN;
- else
- return bright;
+ 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);
+ }
}
-/* RGB values will not illuminate the LED */
-unsigned char led_get(unsigned value)
+void cfg_read()
{
- value = (value * bright_get()) >> 8;
-#ifdef CEIL256
- if (value && value < 0x26)
- return 0x26;
-#else
- if (value && value < 4)
- return 4;
-#endif
- return value;
+ 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 both color and brightness values. */
+/* Set the LEDs using color values and current brightness. */
void leds_set()
{
- rgb_set(led_get((red).value), led_get((grn).value), led_get((blu).value),
- led_get((wht).value));
+ signed char b;
+
+ if (bright > BRIGHT_MAX)
+ b = BRIGHT_MAX;
+ else if (bright < BRIGHT_MIN)
+ b = BRIGHT_MIN;
+ else
+ b = bright;
+ 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;
/* Select the destination color and fade-to time depending upon mode. */
fade_steps = STD_FADE;
if (mode == MODE_PARTY) {
- color = rand() % COLOR_COUNT;
- fade_steps = PARTY_MIN + (rand() % PARTY_RANGE);
+ color = lfsr_get() % COLOR_COUNT;
+ fade_steps = PARTY_MIN + (lfsr_get() % PARTY_RANGE);
} else if (mode == MODE_CYCLE) {
if (++color == COLOR_COUNT)
color = 0;
void pb_clicked()
{
if (on) {
- unsigned char omode = mode;
-
if (mode == MODE_SOLID) {
if (++color == COLOR_COUNT) {
color = 0;
mode = 0;
color = 0;
}
- if (mode != omode || mode == MODE_SOLID)
- tmr_start(TMR_CFG, CFG_DELAY);
+ tmr_start(TMR_CFG, CFG_DELAY);
start_fade();
}
}
else
bright--;
}
+ tmr_start(TMR_CFG, CFG_DELAY);
leds_set();
}
if (mode == MODE_CYCLE)
tmr_start(TMR_INCOLOR, STD_INCOLOR);
else if (mode == MODE_PARTY)
- tmr_start(TMR_INCOLOR, PARTY_MIN + (rand() % PARTY_RANGE));
+ tmr_start(TMR_INCOLOR, PARTY_MIN + (lfsr_get() % PARTY_RANGE));
}
leds_set();
}
void user_boot()
{
dbgpin_high();
- srand((adc_random() << 8) + adc_random());
- cfg_read(mode, color);
+ lfsr_init((adc_random() << 8) + adc_random());
+ cfg_read();
rs_task();
}
auto_offon_task();
break;
case TASK_CFG: /* Save config to EEPROM event */
- cfg_write(mode, color);
+ cfg_write();
break;
}
}
projects / rgblamp.git / blobdiff