35 lines
969 B
C
35 lines
969 B
C
/*
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Cylon eyes actually turns out to be a decent POV routine.
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The only change here is in DELAYTIME.
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*/
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#include <avr/io.h> /* Defines pins, ports, etc */
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#include <util/delay.h> /* Functions to waste time */
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#define DELAYTIME 2 /* milliseconds */
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int main(void) {
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uint8_t i=0;
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DDRB = 0b11111111; /* Data Direction Register B: all on */
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while (1) {
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while (i < 7) {
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PORTB = (1 << i); /* illuminate only i'th pin */
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_delay_ms(DELAYTIME); /* wait */
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i = i + 1; /* move to the next LED */
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}
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while (i > 0) {
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PORTB = (1 << i); /* illuminate only i'th pin */
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_delay_ms(DELAYTIME); /* wait */
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i = i - 1; /* move to the previous LED */
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}
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}
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return 0;
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}
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