DRV8316: Improving Graph Resolution for Monitoring PID Speed in Real-Time

Shahar Cohen

Part Number: DRV8316

Tool/software:

Dear TI Experts,

In my project, I am monitoring the health of my PID controller by observing speed changes live using the graph view. I have a variable that updates every 1 millisecond, but when plotting this data on the graph, it appears to have a lower resolution than expected.

Is there an option to improve the resolution of the graph to better match the update rate of my variable? Or should I consider lowering the timer interrupt interval for better synchronization with the graph?

Thank you for your assistance!

* I update the speed in universal_motorcontrol_lab_f28002x (at systemVars.timerBase_1ms case 1) , using CCS 20,board f2800025c

10 days ago

0 Benjamin Collier 9 days ago

TI__Mastermind 30256 points

Hi,

Our expert on this matter is out of office until early January. Please expect a response then.

Best Regards,

Ben Collier

0 Jason Osborn 1 day ago in reply to Benjamin Collier

TI__Expert 8051 points

Hello Shahar,

At a glance, I'd say the first thing to do is to adjust your CCS Debug Continuous Refresh Interval before you adjust anything in the code.

Open the General Settings (File -> Preferences -> General Settings)
Search for 'refresh'
The default refresh interval (shown in my screenshot) seems very low for your purposes.

I hope this helps!

Regards,
Jason Osborn

Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. 25 through Jan. 2. Thank you for your patience.

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DRV8316: Improving Graph Resolution for Monitoring PID Speed in Real-Time