52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
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#include <avr/io.h>
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#include <util/delay.h>
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#include <base.h>
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#include <sk9822.h>
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uint8_t random_step(uint8_t value, uint8_t min, uint8_t max, rng_t *rng) {
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int8_t step = (rng_sample(rng) % 32) - 16;
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uint16_t new_value = value + step;
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if (new_value > max) {
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return max;
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} else if (new_value < min) {
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return min;
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} else {
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return new_value;
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}
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}
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void flicker(rgb_t *pixel, rng_t *rng) {
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pixel->r = random_step(pixel->r, 180, 255, rng);
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pixel->g = random_step(pixel->g, 10, 40, rng);
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}
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int main (void) {
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DDRB = _BV(2) | _BV(1) | _BV(0);
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PORTB = 0;
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_delay_ms(50);
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io_pin_t data_pin = { .port = &PORTB, .pin = 0 };
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io_pin_t clock_pin = { .port = &PORTB, .pin = 2 };
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rgb_t lamps[2] = { { .brightness = 9, .r = 212, .g = 50, .b = 0 },
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{ .brightness = 1, .r = 0, .g = 0, .b = 0 } };
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int8_t step_1 = 1;
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rng_t rng = rng_new(0);
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while (1) {
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send_pixels(data_pin, clock_pin, lamps, 2);
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flicker(&lamps[0], &rng);
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lamps[1].r += step_1;
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if (lamps[1].r == 255) {
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step_1 = -1;
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} else if (lamps[1].r == 0) {
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step_1 = 1;
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}
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_delay_ms(16);
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}
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}
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