Hello guys.
I´ve a code on Nano that works great but I cant figure out how to code on DUE.
I need a PWM (50% duty) sweep from 1hz to 4MHz with 150 to 200 steps.
Any help ?
Thank you
There are numerous example sketches of PWM programming in the DUE forum, e.g. this one, reply #4:
https://forum.arduino.cc/index.php?topic=396125.0
To output a PWM pulse signal (at 50% duty cycle) with a good continuity between 1 Hz and 4 MHz, you would rather want using SysTick Timer Counter for half periods below 1 ms, and the PWM controller for half periods above 1 ms to set/clear a pin with PIO_SODR/PIO_CODR.
Hi ard_newbie
Thank you for your reply.
This is a great example, i'll try today 
Hi again !
I cant make the sketch work.
This is the original Nano code on pin 9 , could you help me a little ?
The code will run on a synthesizer. I´ll give you the credits to the lines
Thank you
void setup(){
TCCR1A = 0b10000010;
TCCR1B = 0b00011001;
ICR1 = 110;
OCR1A = 55;
}
void loop(){
for (unsigned int frequencyIndex = 0 ; frequencyIndex < ENDFREQ ; frequencyIndex++) {
CLR(TCCR1B, 0);
TCNT1 = 0;
ICR1 = frequencyIndex;
OCR1A = frequencyIndex >> 1;
SET(TCCR1B, 0);
}
}
What don't you understand ?
What I have to put inside the loop to update the freqs.
Hi ard_newbie!
Found a solution , now have to search the frquencies I need!
https://forum.arduino.cc/index.php?topic=420674.0
#10
Thank you!!!!!