AWR2944EVM: [2944 EVM LVDS] unexpected cbuff errror interrupt triggered.

XiangLiping

Prodigy 230 points

Part Number: AWR2944EVM
Other Parts Discussed in Thread: AWR2544, AWR2944

Tool/software:

hw : awr2944evm + dca1000.

sw : sdk <mmwave_mcuplus_sdk_04_04_01_02>

<C:\ti\mmwave_mcuplus_sdk_04_04_01_02\mmwave_mcuplus_sdk_04_04_01_02\ti\demo\awr294x\mmw>

1 : only add these code as picture below.

if(gMmwMssMCB.lvdsStream.swSessionHandle != NULL)

{

MmwDemo_LVDSStreamDeleteSwSession();

}

if (MmwDemo_LVDSStreamSwConfig(0, NULL, NULL) < 0)

{

MmwDemo_debugAssert(0);

}

CacheP_wb((void *)&gMmwMssMCB.lvdsStream.swSessionHSIHeader, sizeof(gMmwMssMCB.lvdsStream.swSessionHSIHeader), CacheP_TYPE_ALL);

if(CBUFF_activateSession(gMmwMssMCB.lvdsStream.swSessionHandle, &errCode) < 0)

{

MmwDemo_debugAssert(0);

}

2 : Run this App.

3 : expected header and data received.

4 : unexpected cbuff error interrupt triggered.

5 : in cbuff error, register STAT_CBUFF_REG1.
.

Q1 : why the cbuff error interrupt triggered.

Q2 : how to solve it.

thansk.

xiang.

11 months ago

0 Saswat Kumar 11 months ago

TI__Mastermind 35265 points

Hello Xiang,

Can you track back, where this interrupt is getting triggered after?
Instead of demo, could you use the cbuff stream test application and try it out there?
Also above which part of the code have you added it and could you check the configurations for the sw configurations?
You can remove the hw streaming activate and debug as well as the configurations might be different.

Regards,
Saswat Kumar

0 XiangLiping 11 months ago in reply to Saswat Kumar

Prodigy 230 points

hi, Kumar

excuse me, <the cbuff stream test application> , where is it? i dont find any sw demo for 2944.

thanks,

xiang.

0 Saswat Kumar 11 months ago in reply to XiangLiping

TI__Mastermind 35265 points

Hello Xiang,

You can find it here: C:\ti\mmwave_mcuplus_sdk_04_04_01_02\mmwave_mcuplus_sdk_04_04_01_02\ti\utils\test\cbuff_stream

Regards,
Saswat Kumar

0 XiangLiping 11 months ago in reply to Saswat Kumar

Prodigy 230 points

hi Kumar,

this path show a hw cbuff session.hw seesion is ok, but i need a sw cbuff session.

thansk,

xiang

0 Saswat Kumar 11 months ago in reply to XiangLiping

TI__Mastermind 35265 points

Hello Xiang,

I am telling you to replace with the sw session here instead of hw.
It is easier to debug a single test case.
Don't call both hw and sw and debug that.

Regards,
Saswat Kumar

0 XiangLiping 11 months ago in reply to Saswat Kumar

Prodigy 230 points

hi Kumar,

1.Can you track back, where this interrupt is getting triggered after?

After CBUFF_activateSession, the interrupt triggered.

2.Instead of demo, could you use the cbuff stream test application and try it out there?

Yes, i did. I modify the <lvds_stream.c>.i changed it from CBUFF_SessionExecuteMode_HW to CBUFF_SessionExecuteMode_SW.

But the cbuff error interrupt is still triggered.

what can i do next?

thansk,

xiang

0 Saswat Kumar 11 months ago in reply to XiangLiping

TI__Mastermind 35265 points

Hello Xiang,

In the entire file have you only modified this?

Regards,
Saswat Kumar

0 XiangLiping 11 months ago in reply to Saswat Kumar

Prodigy 230 points

hi Kumar,

yes.

thansk,

xiang

0 Saswat Kumar 11 months ago in reply to XiangLiping

TI__Mastermind 35265 points

Hello Xiang,

With only this one line change you will not get any result in the application.

CBUFF_SessionCfg is a union structure which has:

Your entire configuration here is based on hwcfg parametrs:

Internal cbuff configurations also change based on what configuration you use.

It is not so straightforward to implement this like you did above.
You need to understand the drivers and implement a similar flow for the sw config.

Regards,
Saswat Kumar

0 XiangLiping 11 months ago in reply to Saswat Kumar

Prodigy 230 points

hi Kumar,

yes, im sorry.i remodify the code.

and i got the result as below.

thansk,

xiang

0 XiangLiping 11 months ago in reply to XiangLiping

Prodigy 230 points

0 Saswat Kumar 11 months ago in reply to XiangLiping

TI__Mastermind 35265 points

Hello Xiang,

And what is your activate session API?

regards,
Saswat Kumar

0 XiangLiping 11 months ago in reply to Saswat Kumar

Prodigy 230 points

hi Kumar,

by calling this.

thansk,

xiang

0 Saswat Kumar 11 months ago in reply to XiangLiping

TI__Mastermind 35265 points

Hello Xiang,

Let me analyze and get back to you early next week as we have holidays in office.

Regards,
Saswat Kumar

0 XiangLiping 11 months ago in reply to Saswat Kumar

Prodigy 230 points

hi Kumar,

Look forward to your reply.:)

thansk,

xiang

0 Saswat Kumar 10 months ago in reply to XiangLiping

TI__Mastermind 35265 points

Hello Xiang,

In your code are you not calling the CBUFF_Activatesession anywhere?

Regards,
Saswat Kumar

0 XiangLiping 10 months ago in reply to Saswat Kumar

Prodigy 230 points

hi Kumar,

yes. CBUFF_Activatesession only be called in <LVDSStream_configLVDSHwData(0);> once.

thansk,

xiang

0 Saswat Kumar 10 months ago in reply to XiangLiping

TI__Mastermind 35265 points

Hello Xiang,

Let me also try this on my end once then.
You are getting chirp error right? Can you confirm by placing a breakpoint in chirperrorisr and seeing in the STAT register which register bit is getting set?
It will take me 2-3 days to get a bench.

Regards,
Saswat Kumar

0 XiangLiping 10 months ago in reply to Saswat Kumar

Prodigy 230 points

hi Kumar,

Yes.I got a chirp error.

The STAT register is shown as below.

thanks,

xiang

0 Saswat Kumar 10 months ago in reply to XiangLiping

TI__Mastermind 35265 points

Hello Xiang,

Okay let me try this once I get the bench and let you know the result, but as far as I have seen these errors, they might be due to session mismanagement (i.e please do go through the bit in the TRM) you are triggering a CBUFF session before another one is complete.

Regards,
Saswat Kumar

0 XiangLiping 10 months ago in reply to Saswat Kumar

Prodigy 230 points

hi Kumar,

Look forward to your reply.:)

thanks,

xiang

0 XiangLiping 10 months ago in reply to XiangLiping

Prodigy 230 points

hi Kumar,

Is there any new progress on this issue.Please tell me.

thanks,

xiang

0 Saswat Kumar 9 months ago in reply to XiangLiping

TI__Mastermind 35265 points

Hello Xiang,

Sorry to give such a delayed response. I was out of office and seems like information was not provided to you.
Currently team tested this with the application present in: C:\ti\mmwave_mcuplus_sdk_04_06_01_02\mcu_plus_sdk_awr2544_09_01_00_05\examples\drivers\cbuff\cbuff_sw_trigger
You can port it to AWR2944 and use it for testing the pure software streaming.

Regards,
Saswat Kumar

0 XiangLiping 9 months ago in reply to Saswat Kumar

Prodigy 230 points

hi Kumar,

sorry, i got the same result on awr2544-evm.yes, i did use the 2544-evm board, but the error interrupt is still tiggered.

thanks,

xiang

0 Saswat Kumar 9 months ago in reply to XiangLiping

TI__Mastermind 35265 points

Hello Xiang,

With this did you receive the data on the DCA?

Regards,
Saswat Kumar

0 XiangLiping 9 months ago in reply to Saswat Kumar

Prodigy 230 points

hi Kumar,

yes, i received the data as the below pic shows.

thanks,

xiang

0 Saswat Kumar 9 months ago in reply to XiangLiping

TI__Mastermind 35265 points

Hello Xiang,

If you are getting the data that should help you move forward with the development, right?

Regards,
Saswat Kumar

0 XiangLiping 9 months ago in reply to Saswat Kumar

Prodigy 230 points

hi Kumar,

yes. i need the lvds interface to transmit real time data to PC. but i got the cbuff error here. maybe this error will affect the accuracy of the data.

So, i need your help.

thanks,

xiang

0 Saswat Kumar 9 months ago in reply to XiangLiping

TI__Mastermind 35265 points

Hello Xiang,

This error does not affect the accuracy of data.
This example is also verified by us, that is why you will see all the packets being sent, are you observing any loss of packets?

Regards,
Saswat Kumar

0 XiangLiping 9 months ago in reply to Saswat Kumar

Prodigy 230 points

hi Kumar,

Does this error have no impact on the data?

Yes, i did receive the whole packets.

But at present, my testing data volume and testing time are limited, and I am worried that there may be data problems with large-scale and long-term data collection in the future.Due to time constraints, it is not possible to verify the data.

If the cbuff error has not effect on data integrity and accuracy, my issue solved.

thanks,

xiang

+1 Saswat Kumar 9 months ago in reply to XiangLiping

TI__Mastermind 35265 points

Hello Xiang,

You can proceed forward with this now as this is what we tested to get the right data.
I will raise internally a ticket to see if this is an actual issue.
If it is then it will be fixed by the software team in the future updates of the software.

Regards,
Saswat Kumar

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AWR2944EVM: [2944 EVM LVDS] unexpected cbuff errror interrupt triggered.