#include
Reference address：AVR MCU 4-channel adjustable PWM
#include
int main(void)
{
DDRA=0XFF;
DDRB=0XFF;
PORTA=0XFF;
PORTB=0X00;
TIMSK=0X00;
TCNT0=0;
OCR0=25;
TCCR0=0B01101001;
//Timer 1, output 7.81220kHz square waveTCNT1H
=0x00; //Counter
clearTCNT1L=0x00;
TCCR1A=0xa9; //8-bit fast PWM, 8-division;
TCCR1B=0x0a;
TCCR1C=0x00;
OCR1A=0x40; //OC1A outputs 25% duty
cycleOCR1B=0x80; //OC1B outputs 50% duty
cycleOCR1C=0xc0; //OC1C outputs 75% duty cycle
while(1);
}
Note that I am using ATMEGA128A, other models may not work, for example, ATMEGA16 is not written like this.
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