48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
#define F_CPU 16000000UL //частота работы микроконтроллера
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#include <util/delay.h>
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#include <avr/io.h>
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#include <avr/interrupt.h>
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void timer1_init(int intfrequency,int fracfrequency,int dutycycle){
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DDRD |= (1 << PORTD6); //OC1A (12)
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DDRD |= (1 << PORTD5); //OC1B (11)
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//Частота
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int frequency = intfrequency + fracfrequency / 10000;
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OCR1A = F_CPU / 1024 / frequency;
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//Скважность
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uint8_t tempOCR1B = OCR1A * dutycycle / 100;
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OCR1B = tempOCR1B;
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TCCR1A = 0;
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TCCR1B = 0;
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TCNT1 = 0;
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// Не инверсный режим работы и OC0B
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uint8_t tempTCCR1A |= (1 << COM1A1) | (0 << COM1A0);
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//Fast PWM (Быстрый ШИМ)
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tempTCCR1A |= (1 << WGM11) | (1 << WGM10);
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uint8_t tempTCCR1B |= (1 << WGM13) | (1 << WGM12);
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//Предделитель - 1024
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tempTCCR1B |= (1 << CS12) | (0 << CS11) | (1 << CS10);
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//Присваивание регистров
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TCCR1A = tempTCCR1A;
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TCCR1B = tempTCCR1B;
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}
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int main(void){
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cli();
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timer1_init(); //после инициализации на выводе OC1B (11) будет ШИМ сигнал
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sei();
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while (1){
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}
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return 0;
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} |