AVR frequency duty cycle adjustable waveform output sub-function

#ifndef _KPWM_H_
#define _KPWM_H_
/*************avr frequency duty cycle adjustable waveform output sub-function**************/
///Formal parameter: Fclk value sets the frequency (in k) Range: 1K to 256K 
/// rat sets the duty cycle (in percentage) eg:40 then the output square wave duty cycle is 40%
//Frequency error is less than 2%, duty cycle error is less than 5%
//PWM frequency calculation formula is f=fox/N(1+TOP) fox is the crystal frequency N is the frequency division coefficient TOP is the maximum count 
//TOP's inverse calculation formula is TOP=FOX/NFclk-1
//In 15 mode, the maximum count value is OCR1A
//The comparison value is placed in OCR1B
//In 15 mode, when clock 1 reaches OCR1B, the OC1B pin jumps
//And the OC1A pin outputs a 50% duty cycle square wave with twice Fclk
//The default crystal frequency here is 12M, which must be modified according to your own MCU
//
void KPWM(unsigned char fcq,unsigned char rat)
{
 unsigned int f,r;
 DDRD|=0X30; //Set PD4 and PD5 as the second function pins OC1B and OC1A respectively 
 TCCR1A|=(0< TCCR1B|=(1< 
 f=12000/fcq; //Calculate the maximum value, because the output unit is a square wave in KHZ, so 12 000 000 removes the last three 0s
 f=f/1;
 f=f-1;
 r=f;
 r=r/10;  
 r=r*rat; //Calculate the comparison value, which is actually divided by 100 to prevent overflow
 r=r/10;
 
 OCR1A=f;
 OCR1B=r;
}
void KPWM_MODE14(unsigned char fcq,unsigned char rat1,unsigned char rat2)
{
 unsigned int f,r1,r2;
 DDRD|=0X30; //Set PD4 PD5 to the second function pin, OC1B OC1A respectively 
 TCCR1A|=(1< levelTCCR1B|=(1< 
 f=12000/fcq;// Calculate the maximum value, because the output unit is a square wave in KHZ, so 12 000 000 removes the last 3 0s
 f=f/1;
 f=f-1;
 r1=f;
 r1=r1/10;  
 r1=r1*rat1; // Calculate the comparison value, which is actually divided by 100 to prevent overflowr1
 =r1/10;
 
 r2=f;
 r2=r2/10;  
 r2=r2*rat2; // Calculate the comparison value, which is actually divided by 100 to prevent overflowr2
 =r2/10;
 ICR1=f;
 OCR1A=r1;
 OCR1B=r2; //Decide the direction here, remember to verify
}
#endif