CCS/EVM430-FR6047: DToF errors

Thank you for your question,

An assigned MSP member will assist you shortly with this issue.

Hi Divya,

Inside the USS_userConfig.h file for your project, you'll find this line of code:

#define USS_ALG_MAX_SAMPLE_SHIFT 20

Your upstream verses downstream deltaToF is greater than 20 samples, you'll get this error when you're flow rate exceeds this max. For larger flow rates, you should increase this value.

BR,

Leo

Hi Leo,

I got a couple of questions:

1) We got this error when we changed the acoustic length from 70 to 62. Is there any relation between acoustic length and "USS_ALG_MAX_SAMPLE_SHIFT"?

2) Is there any limit to increasing "USS_ALG_MAX_SAMPLE_SHIFT " ?

3) Will increasing this also solve DToF correlation error?

Best regards,

Divya Harikumar

Hi Divya,

These two parameters should not be related. Which version of the software are you using?

@Leo,

Do you have any comments on this question?

Best regards,

Cash Hao

Hi Cash,

I am using USS 02_20_00_18 application along with firmware version USS 2_20_00_08 .

Regards,

Divya Harikumar

Hi Divya,

Can you post a screen shot of your configuration and advanced configuration tabs along with a screen shot of an ADC capture when you're seeing this error?

BR,

Leo

Hi Leo,

Sorry for the delay in response!

Best Regards,

Divya Harikumar

Hi Divya,

Can you post a picture of your ADC capture for this configuration?

BR,
Leo

Leo,

Best Regards,

Divya Harikumar

Hi leo,

Even after changing the threshold,it still seems to exist.

Regards,

Divya Harikumar

Hi Divya,

We'll need to look at some continuous captures.  Can you confirm whether this is the same issue being discussed in the below thread?

https://e2e.ti.com/support/microcontrollers/msp430/f/166/t/811573

BR,

Leo

Hi Leo,

The issue seems to be similar to the thread .

Best Regards,

Divya Harikumar