PWM PINS Problem

I have a problem with accessing PWM pins. I managed them as PWM2 and PWM5 from Device Tree Editor. But, I can not reach them from udoo terminal. I wrote:

Code:

sudo sh -c "echo 0 > /sys/class/pwm/pwmchip0/export"

Then, I took from terminal "I/0 Error". How can ı fix this problem ?
Thank you.

 

I am not sure but pwm_2 could be exported with echo 1 > /sys/class/pwm/pwmchip0/export

This would result in a pwm1 in /sys/class/pwm/pwmchip0

But it could also be 2 instead of 1 resulting in pwm2. Depends how the count is done.

 

I just have tried, but I got same result. I will try to manage PWMs from IDE. It may work. Thanks for your response walter.

 

Are you sure you did a reboot after using the device tree editor?

 

Yes, I am sure. I rebooted every time after I used it. Firstly I tried it in default positions of pins, that time terminal showed to me no such files or directory. Then I fixed it logically, but I can not handle it with I/O error

 

I just tried it and I was able to create pwm0 ( pwm_2) with

sudo sh -c "echo 0 > /sys/class/pwm/pwmchip0/export

And I got a working flashing led following the pwm instructions.

 

Do you think I should boot my device ? I will start everything simply