2011-07-11 12:15:35 +02:00
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#include <avr/io.h>
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#include <avr/interrupt.h>
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uint8_t state = 0;
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int main ( void ) {
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/* initialize timer */
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TCCR0 |= (1 << CS01) | (1 << CS00) | (1 << WGM01);
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OCR0 = 123;
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TIMSK |= (1 << OCIE0);
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TIFR |= (1 << OCF0);
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2011-07-13 00:42:27 +02:00
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2011-07-11 12:15:35 +02:00
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sei();
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2011-07-13 00:42:27 +02:00
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return 0;
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2011-07-11 12:15:35 +02:00
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}
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ISR(TIMER0_COMP_vect) {
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state ^= 0xff;
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}
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