37 lines
1.2 KiB
C
37 lines
1.2 KiB
C
/* Cylon Eyes */
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// ------- Preamble -------- //
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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 85 /* milliseconds */
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#define LED_PORT PORTB
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#define LED_PIN PINB
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#define LED_DDR DDRB
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int main(void) {
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// -------- Inits --------- //
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uint8_t i=0;
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LED_DDR = 0xff; /* Data Direction Register B:
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all set up for output */
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// ------ Event loop ------ //
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while (1) {
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while (i < 7) {
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LED_PORT = (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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LED_PORT = (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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} /* End event loop */
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return 0;
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}
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