PWM and DC Brushless

[paramesium]

Hi all,

I wanted to create a pwm signal from my arduino mega 2560 to my DC brushless by using the attached code but something goes wrong, I kept getting error message from labview.

Please help me if anyone knows the solution.

Thank you!

Regards,

Loo

[hrh1818]

I claim you need two "digital write" sub vis in your block diagram.  One "digtal write" to write the pin direction information.  A second "digital write" to wtrite the PWM siganl to the pin .  Try this modification and let us know if it works.

hrh1818

[Nathan_B.]

What error messages are you getting?  What are you using for a motor controller?

Tip:  Never use the "Set Digital Pin Mode.vi" inside of a repeating loop (unless you are changing the mode mid-execution), it will just slow down the Arduino.  Put it outside of the loop after "Init.vi".

[hrh1818]

My comment about needing two digital write sub VIs is bad advice.  I need a lot more time to come up with a better solution  Most llkely others will beat me to a solution.

hrh1818

[hrh1818]

Attached is a version of your PWM that works.   Two comments:

One.  In this version Run the VI, Enter a PWM value and then click on Send.  Repeat the Enter a PWM value and Send sequence as manry times as required.  Click on Stop to quit.

Two.  This version was modifeid to work with COM port 3 on my computer.  You may  need to change the COM port to work with your computer.

hrh1818

[paramesium]

thanks guys for your suggestions.

I am using ESP for the speed control

everything is ok when I put "Set digital pin mode" outside the loop!

Cheers,

Loo