Post by thread:[PIC]: 12C509A web server ????????????

I suspect this is both less than it seems and probably already known about but .... I stumbled across this while on another search. This is simply one slide in a presentation but the claimed capabilities sound interesting. Anyone know more about this ? www-fp.mcs.anl.gov/~stevens/all-presentations/capstone-vis99/tsld024. htm Ah - here we are - IPIC web server http://www-ccs.cs.umass.edu/~shri/iPic.html TCP/IP stack RFC-1122 compliant HTTP 1.0 Direct SLIP connection at 115200 bps -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email spam_OUTlistservTakeThisOuTmitvma.mit.edu with SET PICList DIGEST in the body

The mere fact that he claims to be doing bit-baged serial at 115.2Kbps on a 4MHz 12C509 makes me highly suspicious, to say the least -- as does the fact that the page has been up for a couple of years at least with no further detail, no active demo, no nuthin'. I'd have thought if this were for real we'd have heard more about it. Dale -- Hallo, this is Linus Torvalds and I pronounce Linux as Leennuks. Hallo, this is Bill Gates and I pronounce 'crap' as 'Windows'. On Sat, 17 Nov 2001, Russell McMahon wrote: {Quote hidden}> I suspect this is both less than it seems and probably already known about > but .... > > I stumbled across this while on another search. This is simply one slide in > a presentation but the claimed capabilities sound interesting. > Anyone know more about this ? > > > www-fp.mcs.anl.gov/~stevens/all-presentations/capstone-vis99/tsld024. > htm > > > Ah - here we are - IPIC web server > > http://www-ccs.cs.umass.edu/~shri/iPic.html > > > TCP/IP stack > RFC-1122 compliant > HTTP 1.0 > Direct SLIP connection at 115200 bps -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email .....listservKILLspam@spam@mitvma.mit.edu with SET PICList DIGEST in the body

Funny, there was a post about this on comp.arch.embedded. I had to reply, and similiar to yours except... (from the page - http://www-ccs.cs.umass.edu/~shri/iPic.html) "At 115200bps, the web-server should be able to service about 7200 hits per hour, give or take some. The code itself spends most of its time sitting in the UART which is implemented by bit-banging. Were I to interface it to a PLIP instead of SLIP, and use a Scenix 100MIPS chip in turbo mode..." Now obviously, a 12C509 couldn't do 115.2kbps @ 4Mhz and you couldn't have the bit-bang code AND other stuff fit in 256 bytes. So....keywords here, "Scenix 100MIPs chip.." which might imply that THAT chip is doing all the work. -Tim Hamel In a message dated 11/16/01 7:09:32 AM Pacific Standard Time, daleKILLspamBOTKIN.ORG writes: > The mere fact that he claims to be doing bit-baged serial at 115.2Kbps on > a 4MHz 12C509 makes me highly suspicious, to say the least -- as does the > fact that the page has been up for a couple of years at least with no > further detail, no active demo, no nuthin'. I'd have thought if this were > for real we'd have heard more about it. > > Dale > -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email .....listservKILLspam.....mitvma.mit.edu with SET PICList DIGEST in the body

This came out well over a year ago, and there was quite the discussion on the piclist about it. What it boiled down to was all the links on it were referred to with port numbers, ie http://www.somepicsomewhere.com:1020/somedocument.html The kicker was that it didn't matter what document name you specified. It took the port number, and sent back all the memory from that number to an EOF character in a single packet. A quick and dirty way of serving web pages, but that bit about http compliance may be pushing it. Could be counted as a weakness, though, since you can read every byte from the eeprom, and there are a finite number of port numbers (0-65536, IIRC) so you can only serve a total of 65k data. There are other webservers on PICs, but most are limited to sending only one packet (so each page/image has to be less than 1k). This is the only one that does the port number trick, IIRC. Being based on a slip connection isn't so great for general web apps, either. If you have to have a computer move data from ethernet to slip just to make a pic go, you might as well scrap tcp/ip on the pic and make the computer translate from tcp/ip over ethernet to a simpler protocol and rs485. The pic certianly doesn't need the capabilities of tcp/ip. You could argue that IP alone would still be over doing it. Interesting project though. It encouraged a lot of other people to do the same and better. There are projects floating around out there that hook an f877 to ethernet cards and chips with full tcp/ip stacks. Check out the latest online circuit cellar for an ongoing project in that vein. -Adam Russell McMahon wrote: {Quote hidden}>I suspect this is both less than it seems and probably already known about >but .... > >I stumbled across this while on another search. This is simply one slide in >a presentation but the claimed capabilities sound interesting. >Anyone know more about this ? > > >www-fp.mcs.anl.gov/~stevens/all-presentations/capstone-vis99/tsld024. >htm > > >Ah - here we are - IPIC web server > > http://www-ccs.cs.umass.edu/~shri/iPic.html > > >TCP/IP stack >RFC-1122 compliant >HTTP 1.0 >Direct SLIP connection at 115200 bps > >-- >http://www.piclist.com#nomail Going offline? Don't AutoReply us! >email EraseMElistservspam_OUTTakeThisOuTmitvma.mit.edu with SET PICList DIGEST in the body > > > > > -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listservspam_OUTmitvma.mit.edu with SET PICList DIGEST in the body

>TCP/IP stack LOL >RFC-1122 compliant ROTFLOL >HTTP 1.0 LOLMAO >Direct SLIP connection at 115200 bps ROTFLOLMAO So why these silly peoples around are still useing embedded Linux with at least 1MB RAM to implement TCP/IP stacks? Cheers Tsvetan --- PCB prototypes for $26 at http://run.to/pcb (http://www.olimex.com/pcb) Development boards for PIC, AVR and MSP430 (http://www.olimex.com/dev) -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email @spam@listservKILLspammitvma.mit.edu with SET PICList DIGEST in the body

or that it is simply serving a link to a real website...so all the traffic is just going in and out thru it... {Quote hidden}>From: Tim Hamel <KILLspamTekPhobiaKILLspamAOL.COM> >Reply-To: pic microcontroller discussion list <RemoveMEPICLISTTakeThisOuTMITVMA.MIT.EDU> >To: spamBeGonePICLISTspamBeGoneMITVMA.MIT.EDU >Subject: Re: [PIC]: 12C509A web server ???????????? >Date: Fri, 16 Nov 2001 10:34:30 EST > >Funny, there was a post about this on comp.arch.embedded. I had to reply, >and >similiar to yours except... > >(from the page - http://www-ccs.cs.umass.edu/~shri/iPic.html) >"At 115200bps, the web-server should be able to service about 7200 hits >per hour, give or take some. The code >itself spends most of its time sitting in the UART which is implemented >by bit-banging. Were I to interface it to a >PLIP instead of SLIP, and use a Scenix 100MIPS chip in turbo mode..." > >Now obviously, a 12C509 couldn't do 115.2kbps @ 4Mhz and you couldn't >have the bit-bang code AND other stuff fit in 256 bytes. So....keywords >here, "Scenix 100MIPs chip.." which might imply that THAT chip is doing >all the work. > >-Tim Hamel > >In a message dated 11/16/01 7:09:32 AM Pacific Standard Time, >TakeThisOuTdaleEraseMEspam_OUTBOTKIN.ORG >writes: > > > > The mere fact that he claims to be doing bit-baged serial at 115.2Kbps >on > > a 4MHz 12C509 makes me highly suspicious, to say the least -- as does >the > > fact that the page has been up for a couple of years at least with no > > further detail, no active demo, no nuthin'. I'd have thought if this >were > > for real we'd have heard more about it. > > > > Dale > > > >-- >http://www.piclist.com#nomail Going offline? Don't AutoReply us! >email RemoveMElistservTakeThisOuTmitvma.mit.edu with SET PICList DIGEST in the body > > _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics