DP83867IR: About mactest (margin test) result

takafumi toda

Part Number: DP83867IR
Other Parts Discussed in Thread: AM3352

I believe your company is conducting a mactest (margin test) for ethernet,
is it possible for us to receive the results?

Best regards.
Toda.

over 1 year ago

0 Gerome Cacho over 1 year ago

TI__Mastermind 39785 points

Hello,

I have not heard of such a test,

Sincerely,

Gerome

0 takafumi toda over 1 year ago in reply to Gerome Cacho

Prodigy 90 points

Thank you for your reply.

Never heard of mactest?
Does that mean there are no test results?
If you don't have them, do you know the steps on how to do this test?
By the way, mactest is like as the following.

0 Gerome Cacho over 1 year ago in reply to takafumi toda

TI__Mastermind 39785 points

Hello,

What you are describing is throughput test. While you will need to consult with the MAC vendor for how to enable traffic, for external loopback you will need to connect external cable to RJ-45 with RX pins shorted to TX pins. For PHY loopback, MII loopback (Reg 0x0[14]) is only required.

Sincerely,

Gerome

0 takafumi toda over 1 year ago in reply to Gerome Cacho

Prodigy 90 points

Hello,

Thank you for your reply.
Do you have the throughput test results?
If you have them, could you send me?

Best regards.

0 Gerome Cacho over 1 year ago in reply to takafumi toda

TI__Mastermind 39785 points

Hello,

We do not have documented results for tests like these. Have you conducted these tests on your board? If so, are you having issues?

Sincerely,

Gerome

0 takafumi toda over 1 year ago in reply to Gerome Cacho

Prodigy 90 points

Hello,

No, we have never conducted such a test.
Could you give me some advice on how to conduct throughput test?

Best regards.

0 Gerome Cacho over 1 year ago in reply to takafumi toda

TI__Mastermind 39785 points

Hello,

For this test, you will need to consult with the MAC vendor to enable traffic. From a PHY standpoint, the only procedure needed is for PHY loopback, where Reg 0x0[14] = '1' for MII loopback. Otherwise, PHY configuration is default.

Sincerely,

Gerome

0 takafumi toda over 1 year ago in reply to Gerome Cacho

Prodigy 90 points

Hello.

Do you mean that MAC vendor is the microcomputer manufacturer that connects to PHY?
We use AM3352. This is also your product.

Best regards.

0 Gerome Cacho over 1 year ago in reply to takafumi toda

TI__Mastermind 39785 points

Hello,

I can reassign this thread to the appropriate contact to take up further.

Sincerely,

Gerome

0 Kallikuppa Sreenivasa over 1 year ago in reply to Gerome Cacho

TI__Guru**** 189709 points

Hello Takafumi Toda,

Can you help me understand if you are checking if MAC loop back is supported or you are looking for some specific performance?

Is there a use case for the query that you could share for me to check internally.

Regards,

Sreenivasa

0 takafumi toda over 1 year ago in reply to Kallikuppa Sreenivasa

Prodigy 90 points

Hello.

I want to check if MAC loop back is supported for AM3352.
If it is supported, please let me know how to configure it.

Best regards.

0 Kallikuppa Sreenivasa over 1 year ago in reply to takafumi toda

TI__Guru**** 189709 points

Hello Takafumi Toda,

Thank you.

I will have to check internally and assign to an expert.

Any thoughts if you are interested in ICSS or CPSW interface?

Regards,

Sreenivasa

0 takafumi toda over 1 year ago in reply to Kallikuppa Sreenivasa

Prodigy 90 points

Hello,

Sorry for late reply.
Could you check with the CPSW interface?
Is this supported 1000BASE-T?

Best regards.

0 Kallikuppa Sreenivasa over 1 year ago in reply to takafumi toda

TI__Guru**** 189709 points

Hello Takafumi Toda,

Thank you.

I am assigning to the CPSW expert to answer.

Regards,

Sreenivasa

0 Schuyler Patton over 1 year ago in reply to Kallikuppa Sreenivasa

TI__Mastermind 40080 points

Hi,

I am basing my answer on the diagram above discussing u-boot. In my experience I have not heard of mactest in a u-boot context. Doing a brief search I only one instance of mactest in a competitor specific source tree in u-boot.

From a Linux context TI reviews performance during SDK release testing using standard Linux utilities. Ti does not do MAC testing in the u-boot context.

TI does provide MAC loopback testing SW as part of the MCU+ SDK that has source code that the customer can compile. Here is a link to CPSW section of the user guide describing loopback testing. This code is not part of a u-boot/Linux environment.

Best Regards,

Schuyler

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DP83867IR: About mactest (margin test) result