Post by thread:TCP/IP

Of course, you need an Ethernet controller (unless you use SLIP, etc). Does anyone know what's the cheapest, simplest ethernet controller chipset out there? Those cheap network printer controller boxes must have something simple... Are there any reasonable cheap single-board computers with ethernet built in? I have ideas for a couple of projects where a little box needs to drive some relays, etc., and in turn be driven thru Ethernet from "real" PC or Unix boxes. How about getting one of those cheap printer controller boxes and replacing the EPROM code? Doug Braun ---------- > Alessandro Zummo wrote: > > > > Anyone knows where to get a TCP/IP stack with SLIP/PPP/other interface > > for the PIC micros? > > I would like to connect my stereo to my LAN...8-)

Have you considered a inexpensive RS-232 -> Ethernet box? -----Original Message----- From: Douglas Braun <spam_OUTdougbertTakeThisOuTOTENET.GR> To: .....PICLISTKILLspam@spam@MITVMA.MIT.EDU <PICLISTKILLspamMITVMA.MIT.EDU> Date: Tuesday, June 16, 1998 7:31 AM Subject: Re: TCP/IP {Quote hidden}>Of course, you need an Ethernet controller (unless you use SLIP, etc). >Does anyone know what's the cheapest, simplest ethernet controller >chipset out there? Those cheap network printer controller boxes >must have something simple... > >Are there any reasonable cheap single-board computers with ethernet built >in? >I have ideas for a couple of projects where a little box needs to drive >some >relays, etc., and in turn be driven thru Ethernet from "real" PC or Unix >boxes. >How about getting one of those cheap printer controller boxes and replacing >the >EPROM code? > >Doug Braun > >---------- >> Alessandro Zummo wrote: >> > >> > Anyone knows where to get a TCP/IP stack with SLIP/PPP/other interface >> > for the PIC micros? >> > I would like to connect my stereo to my LAN...8-) >

On Tue, 16 Jun 1998, anick wrote: > Have you considered a inexpensive RS-232 -> Ethernet box? > Motorola makes a processor intended for embedded networking called the 68302. There is a version available with built-in ethernet capability, called the 68EN302. The '302 is actually considered a bit outdated, because they have since introduced the QUICC and powerQUICC, cousins of the '302, but I'm not sure if they have built-in eithernet. Basically, the '302 is a 68000 with bus controller and a RISC communications microcontroller built-in to run code to create some virtual peripherals (such as an HDLC controller). Good luck, Sean > {Original Message removed}

At 01:18 PM 16/06/98 -0400, you wrote: >On Tue, 16 Jun 1998, anick wrote: > >> Have you considered a inexpensive RS-232 -> Ethernet box? >> > >Motorola makes a processor intended for embedded networking called the >68302. There is a version available with built-in ethernet capability, >called the 68EN302. The '302 is actually considered a bit outdated, >because they have since introduced the QUICC and powerQUICC, cousins of >the '302, but I'm not sure if they have built-in eithernet. Basically, >the '302 is a 68000 with bus controller and a RISC communications >microcontroller built-in to run code to create some virtual peripherals >(such as an HDLC controller). > >Good luck, > >Sean > > >> {Original Message removed}

the QUICC and PowerQUICC do have an ethernet port (or perhaps "are available in a version that has an ethernet port".) I think it goes sortof along the lines of having support for CSMA/CD and an external interface for an ethernet manchester encoder/collision-detect/etc. I've been thinking along (my) work related lines - just what would constitute a reasonable "network gateway" for embedded gizmos? Certainly some of this is done by current "terminal server" products - boxes that will turn an rs232 async data stream into tcp packets and vis versa. However, perhaps it is time to go further than that. How about something with enough programmability to generate SNMP or web pages based on async data that has arrived through a rs232 port. More explicit control over packetization? ability to generate UDP traffic, multicasts, etc? What cost-per-port is reasonable? As for doing this sort of thing NOW... Used equipment that is a generation or so out-of-date is available for pretty low prices. New equipment is rather cost-constrained by the baggage that now goes with a network-aware box (and we have more baggage than most, and are therefore more expensive :-) The CHEAPEST way to do this probably involves buying 2400bps (or slower) modems for your gizmo, subscribing to an online service of appropriate type ($30/month?) and having your gizmo dial up, transact appropriately, and hang up again. (You can leveage the online service to read this list :-) Don't laugh - how do you think your credit card gets approved from locations ranging from street fairs (on portable phones) to unattended gasoline pumps. BillW cisco

Hello, the cheapest solution is finding a PC, adding a cheap Ethernet card and connect that serial to the PIC. Then get a TCP/IP stack... You'll be in business for about $100. But maybe this is not what you are looking for, a bit bulky ... Douglas Braun wrote: {Quote hidden}> Of course, you need an Ethernet controller (unless you use SLIP, etc). > Does anyone know what's the cheapest, simplest ethernet controller > chipset out there? Those cheap network printer controller boxes > must have something simple... > > Are there any reasonable cheap single-board computers with ethernet built > in? > I have ideas for a couple of projects where a little box needs to drive > some > relays, etc., and in turn be driven thru Ethernet from "real" PC or Unix > boxes. > How about getting one of those cheap printer controller boxes and replacing > the > EPROM code? > > Doug Braun > > ---------- > > Alessandro Zummo wrote: > > > > > > Anyone knows where to get a TCP/IP stack with SLIP/PPP/other interface > > > for the PIC micros? > > > I would like to connect my stereo to my LAN...8-) -- Regards, ------------------------------------------------------------------ Wim E. van Bemmel No Unsollicited Commercial .....bemspanKILLspam.....xs4all.nl Life is about Interfacing .... ------------------------------------------------------------------

Wim E. van Bemmel wrote: > > Hello, > > the cheapest solution is finding a PC, adding a cheap Ethernet card and connec t > that serial to the PIC. Then get a TCP/IP stack... > You'll be in business for about $100. > But maybe this is not what you are looking for, a bit bulky ... This is a justification that i give in my master article, too! MAW

It sounds like you need to define what you want this 'TCP/IP stack" to do. If I remember correctly the IP Appliance in Circuit Cellar just sent one type of packet with different data in the data field. That hardly qualifies as a 'IP Stack' in my opinion. If that is all you need to do, then get a copy of that code and you are done. However if you want to send and receive data as a real IP device, you will need much more code. You will need to do whatever it is you device is designed to do, PLUS you will need to listen to the IP interface. You will need buffers to receive the data from the IP interface. You will need buffers to build your outgoing packets in. and you will need to do all this fast enough to keep up the data rate on you IP interface. Most of this is not too hard if you know how IP works, but if you only have 100 bytes of RAM it will be VERY, VERY, VERY hard to get it to work. Once again I feel I must state that this all depends on what you want your IP stack to do. The Circuit Cellar project has a VERY narrow focus, and they could write code to do only a very small part of the IP stack that fit their purpose. -John Scott EraseMEkd4vhgspam_OUTTakeThisOuTradio.org

In the July 1999 issue of "Embedded Systems Development", there was a small add for a "Low-Power Chip Adds Internet Functionality" by Seiko Instruments USA, Inc. (http://www.seiko-usa-ecd.com <http://www.seiko-usa-ecd.com> <http://www.seiko-usa-ecd.com <http://www.seiko-usa-ecd.com> > ) Unfortunately the web site did not provide any information. According to the release: "the iChip S7600A TCP/IP Protocol Stack allows Web browsing, email, and networking to be added to consumer or commercial devices easily and inexpensively. It permits users to access the Internet, or any network that utilizes the TCP/IP protocol, using their PDAs, organizers, cell phones, or even pagers. Adding Internet functionality to these types of devices is possible by simply selecting any other pre-defined component, such as a resistor or controller. Running at a speed of 256kHz, the iChip consumes less than 3 mW in typical operation. It is available currently at a cost of $8 in 1000-unit quantities." A picture shows the chip to be about 1/4th the size of a stamp and have 12 pins per side (surface mount). David V. Fansler Network Administrator AutoCyte, Inc. 336-222-9707 Ext. 261 dfanslerspam_OUTautocyte.com <@spam@dfanslerKILLspamautocyte.com> Now Showing! http://www.mindspring.com\~dfansler\ <http://www.mindspring.com\~dfansler\> Updated July 13, 1999

Fansler, David wrote: > In the July 1999 issue of "Embedded Systems Development", there was a small > add for a "Low-Power Chip Adds Internet Functionality" by Seiko Instruments > USA, Inc. (http://www.seiko-usa-ecd.com <http://www.seiko-usa-ecd.com> > <http://www.seiko-usa-ecd.com <http://www.seiko-usa-ecd.com> > ) > Unfortunately the web site did not provide any information. According to > the release: > "the iChip S7600A TCP/IP Protocol Stack allows Web browsing, email, and > networking to be added to consumer or commercial devices easily and > inexpensively. It permits users to access the Internet, or any network that > utilizes the TCP/IP protocol, using their PDAs, organizers, cell phones, or > even pagers. Adding Internet functionality to these types of devices is > possible by simply selecting any other pre-defined component, such as a > resistor or controller. Running at a speed of 256kHz, the iChip consumes > less than 3 mW in typical operation. It is available currently at a cost of > $8 in 1000-unit quantities." > A picture shows the chip to be about 1/4th the size of a stamp and have 12 > pins per side (surface mount). > > David V. Fansler > Network Administrator > AutoCyte, Inc. > 336-222-9707 Ext. 261 > RemoveMEdfanslerTakeThisOuTautocyte.com <spamBeGonedfanslerspamBeGoneautocyte.com> > Now Showing! http://www.mindspring.com\~dfansler\ > <http://www.mindspring.com\~dfansler\> Updated July 13, 1999 You might wanna fix your sig. Change those backslashes to FORWARDslashes. =) Tim Hamel