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FTM0_Init: Processor Expert

Question asked by Armend Gecaj on Feb 20, 2017
Latest reply on Feb 23, 2017 by Armend Gecaj

Hi all,

 

i am using the TWR_K60F Board with CPU: MK60FN1M0VLQ12.

 

I am trying to create a PWM Signal on a PIN (PTC3). The PWM Signal have to be a rectangle signal.

I used the FTM_Init Component from Processor Expert. 

My configurations are:

Clock

-Clock gate --> enabled

-Clock source --> System Clock

- Prescaler --> divide by 1

- Counter Init --> 0

- Modulo counter --> 4

 

Channel

- Channel 2 --> Enabled

- Channel Mode --> edge-aligned PWM

- channel value register --> 2

- Pin --> Enabled (PTC3)

 

Now i have a PWM signal with a period of 0.104 us (9.6 MHz) and a duty cycle of 50%.

 

If i look at the oscillocop then i see the following signal

 

But it has to be a rectangle signal. If i reduce my frequence (for example to 1MHz) then i will get a rectangle signal like that:

That is what i need because my camera needs a PWM signal that have a rising time maximum of 5 ns.

 

I also tried to add a GPIO_Init Component. I enabled the PTC3 - pin (pin sharing) and for the drive strength i selected high.

But i did not help. So if the frequence is to high then i will get a sinus wave.

 

What can i do?

I need a PWM signal with a frequence of 24 MHz and a duty cycle of 50%. With my configuration i will not get a rectangle signal but almost a sinus wave.

 

Thank you for your help!

 

Best Regards 

Armend Gecaj

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