Resolved

CCS/CCSTUDIO-C2000: How to give filtered signal to PID controller as reference ?

Prodigy 90 points

Ananda Hange

Replies: 9

Views: 276

Part Number: CCSTUDIO-C2000

Tool/software: Code Composer Studio

I need to give filtered signal to my pid1 controller as my reference rk. AdcBufFiltered is my filtered signal.i'm using CCSv6.LPF.c

Guru 13315 points

John Westmoreland43
- Feb 14, 2019 9:01 AM
Hello Ananda,

You should take a look at the DCL - Digital Control Library - www.ti.com/.../C2000-DIGITAL-CONTROL-LIBRARY .

HTH,
John W.
- Locked
- Cancel
Do you have another question?

We are glad that we were able to resolve this issue, and will now proceed to close this thread.

If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.

Ask a related question Ask a new question
Prodigy 90 points

Ananda Hange
- Feb 14, 2019 10:05 AM
In reply to John Westmoreland43:

My filtered signal is in the array format of length 50.And i want that signal convert into float rk ,which is my reference to pid. I can't write rk=AdcBufFiltered[index]. then rk is choose any value from the array.how to resolve that problem.
- Locked
- Cancel
Do you have another question?

We are glad that we were able to resolve this issue, and will now proceed to close this thread.

If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.

Ask a related question Ask a new question
Mastermind 23175 points

Richard Poley
- Feb 14, 2019 1:20 PM
In reply to Ananda Hange:

It looks like the filtered signal is in IQ format, so you can use the IQ to float conversion from that library:

rk=_IQtoF(AdcBufFiltered[index]);

You should also typecast the ADC results to float. Your first assignment, the current sensor reading, would look like this:

I_sensor_FC =(float) SampleTable[i] * 7.326007326e-4 - IDC_offset;

On last thing; where you are assigning float constants it's better to place an 'f' at the end to make it unambiguous to the compiler. For example:

float IDC_offset=0.0f, ...

Regards,

Richard
- Locked
- Cancel
Do you have another question?

We are glad that we were able to resolve this issue, and will now proceed to close this thread.

If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.

Ask a related question Ask a new question
Prodigy 90 points

Ananda Hange
- Feb 14, 2019 2:43 PM
In reply to Richard Poley:

Filter.c LPF2.c LPF2.c IQmathLib.hwhen i use this line rk = _IQtoF(AdcBufFilter[index]); i got errors as follows,

Description Resource Path Location Type

unresolved symbol __IQ24toF, first referenced in ./LPF1.obj EV1 C/C++ Problem

Description Resource Path Location Type

<a href="file:/c:/ti/ccsv7/tools/compiler/dmed/HTML/10234.html">#10234-D</a> unresolved symbols remain EV1 C/C++ Problem

Description Resource Path Location Type

#10010 errors encountered during linking; "EV1.out" not built EV1 C/C++ Problem

I attached file LPF2.c which is main file and filter.c and IQmathlib.h file .
- Locked
- Cancel
Do you have another question?

We are glad that we were able to resolve this issue, and will now proceed to close this thread.

If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.

Ask a related question Ask a new question
Mastermind 23175 points

Richard Poley
- Feb 14, 2019 2:58 PM
In reply to Ananda Hange:

It sounds like you haven't linked IQmath.lib. Check section 3.5 of the IQ math Quick Start guide.

Which device are you using?

Regards,

Richard
- Locked
- Cancel
Do you have another question?

We are glad that we were able to resolve this issue, and will now proceed to close this thread.

If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.

Ask a related question Ask a new question
Prodigy 90 points

Ananda Hange
- Feb 15, 2019 5:19 AM
In reply to Richard Poley:

Yeah I hadn't link that IQmath.lib .Even if i link that I got some new error as follows,

Description Resource Path Location Type
<a href="file:/c:/ti/ccsv7/tools/compiler/dmed/HTML/16008.html">#16008-D</a> file "../IQmath.lib<IQ24toF.obj>" specifies ISA revision "C2800", which is not compatible with ISA revision "C28FPU32" specified in a previous file or on the command line EV1 C/C++ Problem.

I'm using Delfino f28335 of c2000 famiy.
- Locked
- Cancel
Do you have another question?

We are glad that we were able to resolve this issue, and will now proceed to close this thread.

If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.

Ask a related question Ask a new question
Mastermind 23175 points

Richard Poley
- Feb 15, 2019 1:44 PM
In reply to Ananda Hange:

I think this is because you've built for the FPU32 but are linking the fixed point version of IQmath. Try linking "IQmath_fpu32.lib" instead of "IQmath.lib". Both are in the \lib sub-directory in C2000Ware.

Regards,

Richard
- Locked
- Cancel
Do you have another question?

We are glad that we were able to resolve this issue, and will now proceed to close this thread.

If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.

Ask a related question Ask a new question
Guru 13315 points

John Westmoreland43
- Mar 5, 2019 3:33 AM
In reply to Richard Poley:

Hello Ananda,

Just wondering - were you able to resolve your issue?

Did Richard's last reply do the trick for you?

Thanks,
John W.
- Locked
- Cancel
Do you have another question?

We are glad that we were able to resolve this issue, and will now proceed to close this thread.

If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.

Ask a related question Ask a new question
Prodigy 90 points

Ananda Hange
- Mar 5, 2019 5:57 AM
In reply to John Westmoreland43:

yeah problem is resolve.

Thanks.
- Locked
- Cancel
Do you have another question?

We are glad that we were able to resolve this issue, and will now proceed to close this thread.

If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.

Ask a related question Ask a new question