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Added HSV support

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Nick Singer 2014-08-07 17:38:08 +02:00
parent 5806903747
commit 5d0ed0a5e2
2 changed files with 52 additions and 0 deletions
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51
ledcontroller.c
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@ -128,6 +128,57 @@ void led_set(uint8_t lednum, uint16_t red, uint16_t green, uint16_t blue)
}
void led_set_hsv(uint8_t lednum, uint16_t hue, uint8_t saturation, uint8_t value)
{
uint16_t red, green, blue;
//Calculate hue
if ( hue < 61 ) {
red = 255;
green = ( 425UL * hue ) / 100;
blue = 0;
} else if ( hue < 121 ) {
red = 255 - ( ( 425UL * ( hue - 60 ) ) / 100 );
green = 255;
blue = 0;
} else if ( hue < 181 ) {
red = 0;
green = 255;
blue = ( 425UL * ( hue - 120 ) ) / 100;
} else if ( hue < 241 ) {
red = 0;
green = 255 - ( ( 425UL * ( hue - 180 ) ) / 100 );
blue = 255;
} else if ( hue < 301 ) {
red = ( 425UL * ( hue - 240 ) ) / 100;
green = 0;
blue = 255;
} else if ( hue < 360) {
red = 255;
green = 0;
blue = 255 - ( ( 425UL * ( hue - 300 ) ) / 100);
}
//Calculate saturation
uint8_t diff;
saturation = 100 - saturation;
diff = ( ( 255 - red ) * saturation ) / 100;
red += diff;
diff = ( ( 255 - green ) * saturation ) / 100;
green += diff;
diff = ( ( 255 - blue ) * saturation ) / 100;
blue += diff;
//Calculate value
red = ( red * value ) / 100;
green = ( green * value ) / 100;
blue = ( blue * value ) / 100;
led_set(lednum, red<<8, green<<8, blue<<8);
}
/*
* Write the data stored in the LED buffers via led_set().
*/

1
ledcontroller.h
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@ -18,6 +18,7 @@
void led_init(void);
void led_set(uint8_t lednum, uint16_t red, uint16_t green, uint16_t blue);
void led_set_hsv(uint8_t lednum, uint16_t hue, uint8_t saturation, uint8_t value);
void led_flush(void);
void led_clear(void);
void led_turn_all_on(void);