This code as below I have used to evaluate my PWM Output with 50% Duty cycle to kick My laser diode. The code explained clearly for beginner like me. I don't want to write bla bla bla just try out.
/*
Prorotype Code for 1-4MHz PWM 50% Duty Cycle
ICR1 as TOP = crystal / (2PrescaleFpwm) in MODE 9
at 16000000MHz 64 Prescale PWM Fmax = 62.5KHz
at 16000000MHz 8 Prescale PWM Fmax = 500KHz
at 16000000MHz 1 Prescale PWM Fmax = 4MHz
*/
void setup(){
pinMode(9, OUTPUT); // OCR1A Output
pinMode(10, OUTPUT); // Just test LED on OCR1B Generally LED
digitalWrite(10, LOW);
delay(1000);
digitalWrite(10, HIGH);
//phase/frequency correct mode.
TCCR1A = _BV(COM1A1); // Enable OCR1A
//TCCR1A = _BV(COM1A1) | _BV(COM1B1) ; // Enable OCR1A and OCAR1B
// TCCR1A = _BV(COM1A1) | _BV(COM1B1) | _BV(COM1A0) | _BV(COM1B0);
//TCCR1B = _BV(WGM13) | _BV(CS11); // Set Prescale Clock 8 and Mode 9
TCCR1B = _BV(WGM13) | _BV(CS10); // Set Prescale Clock 1 and Mode 9
}
void loop(){
//ICR minimum 2 F = 16000000MHz No Change if using 14.7456MHz very close for fucking lazy bitch. and I don't need precision PWM at all.
16.MHz Xtal for PWM Frequency while 14.7456MHz for Precision Baudrate RS232/RS485/RS422
/*make this variable as table.
//ICR1 = 10,000; // 100Hz w/16MHz Prescale 8
//ICR1 = 5,000; // 200Hz w/16MHz Prescale 8
//TEST 500MHZ MAX
//ICR1 = 2; // 500KHz w/16MHz Prescale 8
// Test 4MHZ MAX
ICR1 = 2; // 4MHz w/ 1600000MHz Prescale 1
OCR1A = ICR1 / 2; // 50 Duty of ICR1
}