LPC MicrocontrollersのトピックRe: Ethernet Transmission Problem

Ethernet Transmission Problem

pankajpatil — Thu, 28 Dec 2017 18:58:37 GMT

Hello, we are using LPC54608J512. While working with ethernet stuck somewhere in transmission of data.

MAC is configured as described in datasheet and as referenced by sample codes in LPCexpresso.

1) Data is receiving as expected. And working fine. Also physical chip communicate correctly.

That gives all events correctly like autonegotiation. PHY8720

2 ) steps following for transmission:

a) Fill buffer for at current descriptor index

b) setup descriptor for transmission. IOC disabled.

c) increment descriptor index

d) set tail pointer = next descriptors start address in ring.

e) poll for own flag to clear by descriptor

f) following steps a to e for each transmission.

Even if we use interrupt for transmission, get interrupt after each transmission.

But frame in not shown at PC side, wireshark

How we can check transmitted out frames by MAC? Is there any configuration wrong?

How to check frame received by Phy8720?

Please help for the same.

Thank you.

Re: Ethernet Transmission Problem

pankajpatil — Fri, 29 Dec 2017 14:14:59 GMT

Hello,

I have checked status of TXEN pin, it seen like some variations while transmission, It not acts as accepted(High while transmission).

So, I any one has faced this issue, please help.

Thanks.

Re: Ethernet Transmission Problem

jeremyzhou — Tue, 02 Jan 2018 02:59:20 GMT

Thank you for your interest in NXP Semiconductor products and 

for the opportunity to serve you.

I'd highly recommend you to refer to the demos in the ~\boards\lpcxpresso54608\driver_examples\enet file of the SDK library.

MCUXpresso SDK|NXP

Have a great day,
TIC

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

Re: Ethernet Transmission Problem

pankajpatil — Tue, 02 Jan 2018 12:25:21 GMT

Hello jeremyzhou,

Yes, I have refered the sample program for implementation.

I have checked the waveform for TXD0, TXD1, and TXEN it looks like correct, while transmission. But I am

using wireshark to see packets transmitted by device. I think I am somewhere wrong at checksum and insertion control.

I am transmitting ARP packet on the network.

Is there any other way or simulation software to see transmitted packets.

Thanks.

Re: Ethernet Transmission Problem

pankajpatil — Wed, 03 Jan 2018 10:38:40 GMT

Hello,

I have checked the transmitted frames at other device, it seen like last 3-4 bytes are corrupted.

Is any one faced this issue in transmission? Please reply for the same.

Re: Ethernet Transmission Problem

jeremyzhou — Thu, 04 Jan 2018 02:47:35 GMT

Hi Pankaj Patil,

Thanks for your reply.

Which demo code you run, and whether you can upload the captured data or wave.

Have a great day,
TIC