53 lines
989 B
C
53 lines
989 B
C
#include <avr/interrupt.h>
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#include <avr/sleep.h>
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#include <dio.h>
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#define FPS 10
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#define FPS_MS 1000 / FPS
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#define MULT 5
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typedef struct {
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uint8_t value;
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int8_t inc;
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} counter_t;
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void counter_update(counter_t *self) {
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int16_t value = self->value;
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value += self->inc;
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if (value >= 255) {
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self->value = 255;
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self->inc = -1;
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} else if (value <= 0) {
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self->value = 0;
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self->inc = 1;
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} else {
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self->value = value;
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}
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}
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int main(void) {
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DDRB = 0xff;
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PORTB = 0;
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GTCCR = 0;
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TCCR0A = _BV(COM0A1) | _BV(COM0B1) | _BV(WGM01) | _BV(WGM00);
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TCCR0B = _BV(CS00);
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counter_t red = (counter_t){ .value = 128, .inc = 1 };
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counter_t blue = (counter_t){ .value = 0, .inc = 1 };
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while(1) {
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OCR0A = red.value;
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OCR0B = blue.value;
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_delay_ms(10);
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counter_update(&red);
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counter_update(&blue);
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}
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return 0;
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}
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