using Barkley API, missing recv packets?

TCP/IP Chip W5100S
1

I am trying to use W5100S with Barkley API, which seems to start working OK, connection is established, and data transfer begins. However after a short time my device (server) waits for a response from client, but it looks like client already sent it, but the W5100S missed it. How can I check it?
I also fine cases that I call recv(sn, buf,len), but it reads more then len bytes from the chip RX buffer (looks like it reads all pending bytes).
This is incorrect behavior, I wonder if it should be like so (it should retrive only len bytes, even if the buffer has more)
Thanks
Johanan

2

Hi~ johanan

Could you check the socket buf size about opened socket?
Please attach the wireshark capture file(*.pcap) and I think I can solve the problem more quickly.

thanks
BR
irina

3

Hello Irina,

I didn’t make any initialization to socket buffer size as I assume it is the default 2K after reset.

I never send or recv buffer larger then 1K, so I think this is not the issue.

I will do wireshark capture and send you on separate mail.

Thanks and regards,

Johanan

4

Hi~ Johanan

Did you send me an email with the package capture file attached?
I don’t receive your email.

thanks,
BR
irina

5

Hi Irina,
Thanks for the followup, but I had an urgent bug in another project and didn’t make it.
Will do it on Monday.
Best regards
Johanan.


irina_kim

      WIZnet Team




    April 11

johanan:
I will do wireshark capture and send you on separate mail.

Thanks and regards,

Johanan

Hi~ Johanan

Did you send me an email with the package capture file attached?

I don’t receive your email.

thanks,

BR

irina

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In Reply To


johanan

    April 10

Hello Irina, I didn’t make any initialization to socket buffer size as I assume it is the default 2K after reset. I never send or recv buffer larger then 1K, so I think this is not the issue. I will do wireshark capture and send you on separate mail. Thanks and regards, Johanan

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missing recv packets?
CC:

6

Hello Irina,

Well I used Wireshark, found my problem.

(It was enough to suggest using it, :slight_smile: )

All working now.

Thanks.

Johanan

7

Hi Irina,
Now I have my system is working quite well,

I would like to speed it up by using SPI DMA (using the Barkley API).

I found this document in Korean, do you have in English? (I couldn’t find).

https://wizwiki.net/wiki/lib/exe/fetch.php?media=products:w5100s:w5100s_evb:w5100s_an_dma_v100k.pdf

Thanks,
Johanan

8

Hi~ Johanan

Currently, I didn’t write the document in English version yet.
I think you can’t need to see the document of English version when DMA mode use.
If you need to see the document of English version, I will send email you after write the document as soon as possible.

thanks,
irina

9

Hi~ Johana

I uploaded the W5100S DMA document in English version.
You can download it by clicking the link below.
Download link : W5100S DMA Datasheet(En)

thanks,
BR
irina

10

Thank you very much.
I have one question about optimal 25 MHz crystal for W6100 (we are making a pcb for it), can you advice suitable crystal part number?

Regards

Johanan

11

Hi~ johanan

You have to use 25MHz crystal when you make the pcb using the W6100.
We have used the crystal part(82J0626-25.000MHz) and Tech.Characteristic is X-tal 25MHz,3.2x2.5 SMD, CL=27pF,Industrial,ITTI .

For detailed information, you visit the web site : W6100 EVB Schematic

thanks,
BR
irina

12

Hi, as we are preparing to make our own PCB with your module, I am confused which module is best for us, and which one is the most updated.
Please let me know difference between W5100S, W5500, and W6100.

I need to make sure that I select right chip for me which means:

  1. Stable user library.

  2. Availability (in stock)

  3. Price.

Please let me know what is the recommended chip for new design.

Best Regards

Johanan

13

Hi irina_kim

Can you post link where to find those crystals? I’ve been through all webshops with crystals and couldnt find any that’s as near as those specifications