Re: Embedded Ethernet

From	pozz <pozzugno@gmail.com>
Newsgroups	comp.arch.embedded
Subject	Re: Embedded Ethernet
Date	2017-10-16 17:54 +0200
Organization	A noiseless patient Spider
Message-ID	<os2kn9$gqd$1@dont-email.me> (permalink)
References	<oq3bj1$btg$1@dont-email.me> <os27k4$eq3$1@dont-email.me> <os2b4f$a09$1@dont-email.me>

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Il 16/10/2017 15:10, David Brown ha scritto:
> On 16/10/17 14:10, pozz wrote:
>> Il 22/09/2017 17:52, pozz ha scritto:
>>> There are many MCUs with embedded Ethernet (MAC). It seems most of the
>>> open-source examples are lwip-based.
>>>
>>> I have to design a board with one RS485 port and one Ethernet port. It
>>> could be seen as a serial-to-Ethernet converter, where the protocol on
>>> RS485 is proprietary. On Ethernet side I will contact a server (cloud)
>>> with a protocol that must be defined.
>>>
>>> At the moment, I don't need to implement a server, only a simple client.
>>>
>>> Do you suggest some hw/fw platforms that you think are better than
>>> others?
>>
>> Another question related to embedded Ethernet.
>>
>> If I implement a simple Web Server to remotely control the device from a
>> standard Web Browser, I need some non volatile memory space to store web
>> pages (html, css, images...).
>>
>> It's difficult to estimate the amount of data I will need for "web
>> server filesystem", however I think it's highly probable the internal
>> Flash memory of MCU will not be sufficient.
>>
> 
> That depends entirely on the MCU in question, and the complexity of the
> web page.  I have no problem with webpages in the MCU I am using (512 KB
> flash).

Thanks for sharing your experience.


> Note also that static data, such as images, javascript libraries, html
> files, can easily be taken from an independent webserver as long as the
> client has internet access - maybe you need nothing more than a "loader"
> index.html and dynamic json "files" on your internal webserver.

Good suggestion.


I have other two doubts.

RTOS (Free-RTOS) or not? I usually don't use RTOS and I never found it 
is necessary in my applications. However TCP/IP, HTTP server and a 
filesystem management could be tricky without an OS.

I studied the contrib example httpserver_raw in lwip project (an HTTP 
server without an OS). It uses a script (makefsdata) to create a virtual 
filesystem as a C source code. Is it ok for simple web pages?


The other question. What about dynamic content? The example seems show 
only static content.

Thread

Embedded Ethernet pozz <pozzugno@gmail.com> - 2017-09-22 17:52 +0200
  Re: Embedded Ethernet mmm <m.colandrea@libero.it> - 2017-09-22 18:00 +0200
  Re: Embedded Ethernet David Brown <david.brown@hesbynett.no> - 2017-09-22 20:27 +0200
    Re: Embedded Ethernet pozz <pozzugno@gmail.com> - 2017-11-17 10:25 +0100
      Re: Embedded Ethernet Theo Markettos <theom+news@chiark.greenend.org.uk> - 2017-11-17 10:39 +0000
        Re: Embedded Ethernet pozz <pozzugno@gmail.com> - 2017-11-17 12:25 +0100
      Re: Embedded Ethernet "Boudewijn Dijkstra" <sp4mtr4p.boudewijn@indes.com> - 2017-11-17 11:36 +0100
        Re: Embedded Ethernet pozz <pozzugno@gmail.com> - 2017-11-17 12:54 +0100
      Re: Embedded Ethernet David Brown <david.brown@hesbynett.no> - 2017-11-17 15:23 +0100
      Re: Embedded Ethernet Mikko OH2HVJ <mikko.syrjalahti@nospam.fi> - 2017-11-18 11:29 +0200
  Re: Embedded Ethernet Joe Chisolm <jchisolm6@earthlink.net> - 2017-09-22 13:31 -0500
    Re: Embedded Ethernet pozz <pozzugno@gmail.com> - 2017-09-23 00:01 +0200
      Re: Embedded Ethernet raimond.dragomir@gmail.com - 2017-09-22 22:38 -0700
        Re: Embedded Ethernet raimond.dragomir@gmail.com - 2017-09-22 22:41 -0700
      Re: Embedded Ethernet David Brown <david.brown@hesbynett.no> - 2017-09-23 12:02 +0200
        Re: Embedded Ethernet Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-09-23 06:32 -0400
          Re: Embedded Ethernet Dimiter_Popoff <dp@tgi-sci.com> - 2017-09-23 15:31 +0300
            Re: Embedded Ethernet Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-09-25 13:07 -0400
              Re: Embedded Ethernet Robert Wessel <robertwessel2@yahoo.com> - 2017-09-25 15:31 -0500
                Re: Embedded Ethernet Dimiter_Popoff <dp@tgi-sci.com> - 2017-09-27 01:50 +0300
          Re: Embedded Ethernet Les Cargill <lcargill99@comcast.com> - 2017-09-28 20:07 -0500
        Re: Embedded Ethernet upsidedown@downunder.com - 2017-09-23 14:48 +0300
        Re: Embedded Ethernet Les Cargill <lcargill99@comcast.com> - 2017-09-28 20:06 -0500
          Re: Embedded Ethernet Joe Chisolm <jchisolm6@earthlink.net> - 2017-09-29 09:41 -0500
          Re: Embedded Ethernet upsidedown@downunder.com - 2017-09-30 18:49 +0300
        Re: Embedded Ethernet pozz <pozzugno@gmail.com> - 2017-10-12 11:26 +0200
          Re: Embedded Ethernet David Brown <david.brown@hesbynett.no> - 2017-10-12 12:46 +0200
          Re: Embedded Ethernet Joe Chisolm <jchisolm6@earthlink.net> - 2017-10-12 10:49 -0500
      Re: Embedded Ethernet Grant Edwards <invalid@invalid.invalid> - 2017-09-23 20:40 +0000
        Re: Embedded Ethernet Joe Chisolm <jchisolm6@earthlink.net> - 2017-09-23 19:24 -0500
          Re: Embedded Ethernet David Brown <david.brown@hesbynett.no> - 2017-09-24 13:28 +0200
  Re: Embedded Ethernet Les Cargill <lcargill99@comcast.com> - 2017-09-22 21:12 -0500
  Re: Embedded Ethernet Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2017-09-24 11:01 +0300
  Re: Embedded Ethernet pozz <pozzugno@gmail.com> - 2017-10-16 14:10 +0200
    Re: Embedded Ethernet David Brown <david.brown@hesbynett.no> - 2017-10-16 15:10 +0200
      Re: Embedded Ethernet pozz <pozzugno@gmail.com> - 2017-10-16 17:54 +0200
        Re: Embedded Ethernet David Brown <david.brown@hesbynett.no> - 2017-10-16 23:45 +0200
          lwip/httpd: how to return dynamic data [was Re: Embedded Ethernet] pozz <pozzugno@gmail.com> - 2017-11-13 12:11 +0100
            Re: lwip/httpd: how to return dynamic data [was Re: Embedded Ethernet] David Brown <david.brown@hesbynett.no> - 2017-11-13 14:14 +0100

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