static void rgb(uint8_t r, uint8_t g, uint8_t b)
{
// Reset.
SET_BIT_LO(PORTB, PIN);
_delay_us(RESET);
// Green
for (uint8_t bit = 0; bit < 8; bit++) {
if (g & 0x80) {
SET_BIT_HI(PORT, PIN);
_delay_ns(ON_HI);
SET_BIT_LO(PORT, PIN);
_delay_ns(ON_LO);
} else {
SET_BIT_HI(PORT, PIN);
_delay_ns(OFF_HI);
SET_BIT_LO(PORT, PIN);
_delay_ns(OFF_LO);
}
g <<= 1;
}
// Red
for (uint8_t bit = 0; bit < 8; bit++) {
if (r & 0x80) {
SET_BIT_HI(PORT, PIN);
_delay_ns(ON_HI);
SET_BIT_LO(PORT, PIN);
_delay_ns(ON_LO);
} else {
SET_BIT_HI(PORT, PIN);
_delay_ns(OFF_HI);
SET_BIT_LO(PORT, PIN);
_delay_ns(OFF_LO);
}
r <<= 1;
}
// Blue
for (uint8_t bit = 0; bit < 8; bit++) {
if (b & 0x80) {
SET_BIT_HI(PORT, PIN);
_delay_ns(ON_HI);
SET_BIT_LO(PORT, PIN);
_delay_ns(ON_LO);
} else {
SET_BIT_HI(PORT, PIN);
_delay_ns(OFF_HI);
SET_BIT_LO(PORT, PIN);
_delay_ns(OFF_LO);
}
b <<= 1;
}
}
// Drive the three pixels in an infinite loop.
void threepixeldemo(void)
{
// Configure pin for output.
SET_BIT_HI(DDR, PIN);
SET_BIT_LO(PORT, PIN);
// off->red, off->green, off->blue
RGB_t rgb[3] = {{0,0,0},{0,0,0},{0,0,0}};
WS2811RGB(rgb, ARRAYLEN(rgb));
_delay_ms(PAUSE);
for (int i = 0; i < 255; i++) {
rgb[0].r += 1;
rgb[1].g += 1;
rgb[2].b += 1;
WS2811RGB(rgb, ARRAYLEN(rgb));
_delay_ms(DELAY);
}
// loop forever.
for (;;) {
// red->yellow, green->cyan, blue->magenta
for (int i = 0; i < 255; i++) {
rgb[0].g += 1;
rgb[1].b += 1;
rgb[2].r += 1;
WS2811RGB(rgb, ARRAYLEN(rgb));
_delay_ms(DELAY);
}
// yellow->green, cyan->blue, magenta->white
for (int i = 0; i < 255; i++) {
rgb[0].r -= 1;
rgb[1].g -= 1;
rgb[2].g += 1;
WS2811RGB(rgb, ARRAYLEN(rgb));
_delay_ms(DELAY);
}
// green->cyan, blue->magenta, white->red
for (int i = 0; i < 255; i++) {
rgb[0].b += 1;
rgb[1].r += 1;
rgb[2].g -= 1;
rgb[2].b -= 1;
WS2811RGB(rgb, ARRAYLEN(rgb));
_delay_ms(DELAY);
}
// cyan->blue, magenta->white, red->yellow
for (int i = 0; i < 255; i++) {
rgb[0].g -= 1;
rgb[1].g += 1;
rgb[2].g += 1;
WS2811RGB(rgb, ARRAYLEN(rgb));
_delay_ms(DELAY);
}
// blue->magenta, white->red, yellow->green
for (int i = 0; i < 255; i++) {
rgb[0].r += 1;
rgb[1].g -= 1;
rgb[1].b -= 1;
rgb[2].r -= 1;
WS2811RGB(rgb, ARRAYLEN(rgb));
_delay_ms(DELAY);
}
// magenta->white, red->yellow, green->cyan
for (int i = 0; i < 255; i++) {
rgb[0].g += 1;
rgb[1].g += 1;
rgb[2].b += 1;
WS2811RGB(rgb, ARRAYLEN(rgb));
_delay_ms(DELAY);
}
// white->red, yellow->green, cyan->blue
for (int i = 0; i < 255; i++) {
rgb[0].b -= 1;
rgb[0].g -= 1;
rgb[1].r -= 1;
rgb[2].g -= 1;
WS2811RGB(rgb, ARRAYLEN(rgb));
_delay_ms(DELAY);
}
}
}
int main(int argc, const char *argv[])
{
// Init system clock, disable WDT...
clock_prescale_set(clock_div_1);
MCUSR &= ~(1 << WDRF);
wdt_disable();
// Configure pin
SET_BIT_HI(DDR, PIN);
// Off
rgb(0, 0, 0);
for (;;) {
// Red
rgb(255, 0, 0);
_delay_ms(PAUSE);
// Yellow
rgb(255, 255, 0);
_delay_ms(PAUSE);
// Green
rgb(0, 255, 0);
_delay_ms(PAUSE);
// Cyan
rgb(0, 255, 255);
_delay_ms(PAUSE);
// Blue
rgb(0, 0, 255);
_delay_ms(PAUSE);
// Magenta
rgb(255, 0, 255);
_delay_ms(PAUSE);
// White
rgb(255, 255, 255);
_delay_ms(PAUSE);
// Off
rgb(0, 0, 0);
_delay_ms(PAUSE);
// Red up
for (int i = 0; i <= 255; i++) {
rgb(i, 0, 0);
_delay_ms(DELAY);
}
// Red -> yellow
for (int i = 0; i <= 255; i++) {
rgb(255, i, 0);
_delay_ms(DELAY);
}
// Yellow -> green
for (int i = 0; i <= 255; i++) {
rgb(255 - i, 255, 0);
_delay_ms(DELAY);
}
// Green -> cyan
for (int i = 0; i <= 255; i++) {
rgb(0, 255, i);
_delay_ms(DELAY);
}
// Cyan -> blue
for (int i = 0; i <= 255; i++) {
rgb(0, 255 - i, 255);
_delay_ms(DELAY);
}
// Blue -> magenta
for (int i = 0; i <= 255; i++) {
rgb(i, 0, 255);
_delay_ms(DELAY);
}
// Magenta -> white
for (int i = 0; i <= 255; i++) {
rgb(255, i, 255);
_delay_ms(DELAY);
}
// White -> Off
for (int i = 0; i <= 255; i++) {
rgb(255 - i, 255 - i, 255 - i);
_delay_ms(DELAY);
}
_delay_ms(PAUSE);
}
}
