CCS 3.3 Graphical Display problem

Bob D.

Hi,

I'm having a problem using the graphical display feature of CCS3.3. As a test to learn this function, I set up a fixed value variable and tried to graph it. No matter what type of value I use (float, int, uint) all I get on the display is garbage. The variable that I'm using is set to a constant value yet the graph shows data all over the place. In the screen shown below, the graphed value (command_Af) is a float set to 1. I verified it's actually 1 at the breakpoint using the watchwindow. I've tried various combinations of Buffer size, sample rate, and Display data size with no luck.

Any ideas of what could be wrong?

Thanks.

over 14 years ago

0 Ki over 14 years ago

TI__Guru**** 472131 points

Hi Bob,

I think you meant to use '&command_Af' as the start address?

0 Bob D. over 14 years ago in reply to Ki

Expert 2430 points

Hi Ki,

I did and I thought that was it when I saw your reply, but when I tried it, I get a slightly different, but still incorrect graphical display. I would expect the value on the display to be a straight line at "1".

Bob

0 Ki over 14 years ago in reply to Bob D.

TI__Guru**** 472131 points

Bob D. said:
I would expect the value on the display to be a straight line at "1".

This is what I see when I try it out. What does your graph look like?

0 Bob D. over 14 years ago in reply to Ki

Expert 2430 points

Here's what I see when I stop at any of the 3 points in the loop where command_Af is set or if I just set command_Af =1. I've also tried putting the actual address in for command_Af but I get the same thing. I've also tried using int's and uint's but get similar results. This is pretty frustrating since it appears so simple. What could be wrong?

0 Bob D. over 14 years ago in reply to Bob D.

Expert 2430 points

I found the problem. Need to set Acquisition buffer size to 1 to plot 1 variable.

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CCS 3.3 Graphical Display problem