HTML files 2kB not served

Question

We use the W5100s chip in our design. I implemented the ioLibrary DHCP and HTTP server, both modules work fine, except that if I make my HTML page > 2kB, it seems that only the first 2kB of the page are sent to the client (browser), so I got to see half a web page. I put debug logging at the lowest level, WIZCHIP_WRITE_BUF() and from there the library says it sends the first 2047 bytes and the second 2047 bytes and then the remaining 294 bytes, however the last 2 parts are not put on the ethernet bus at all. To avoid a TX buffer overrun, the http_server module is called every 200ms. Any idea why the remaining data is not sent?

Eugeny · Answer

My educated guess is that you have some issue with TX buffer management, which, by default, is 2K in size. Impossible to say anything without related portions of code.

Daan · Answer

Yes, I know the default buffer size is 2kB, I see the first 2kB being sent correctly, so the buffer size should not be an issue. I didn’t change ioLibrary in its functionality, I just configured the way of interfacing to the chip, set up an HTML page and let ioLibrary send it on request of the client. What part of the code are you interested in?

Daan · Answer

Thank you Eric. I didn’t call reg_httpServer_webContent() correctly. Now it works great

HTML files > 2kB not served

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