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楼主 |
发表于 2013-3-19 20:19:07
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- #define ledPin 13
- void setup()
- {
- pinMode(ledPin, OUTPUT);
-
- // initialize timer1
- noInterrupts(); // disable all interrupts
- TCCR1A = 0;
- TCCR1B = 0;
- TCNT1 = 0;
- OCR1A = 31250; // compare match register 16MHz/256/2Hz
- TCCR1B |= (1 << WGM12); // CTC mode
- TCCR1B |= (1 << CS12); // 256 prescaler
- TIMSK1 |= (1 << OCIE1A); // enable timer compare interrupt
- interrupts(); // enable all interrupts
- }
- ISR(TIMER1_COMPA_vect) // timer compare interrupt service routine
- {
- digitalWrite(ledPin, digitalRead(ledPin) ^ 1); // toggle LED pin
- }
- void loop()
- {
- // your program here...
- }
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