Jose Ildefonso Camargo Tolosa
2003-Aug-19 14:06 UTC
[Asterisk-Users] Re: Open source IP phone, maybe?
Hi! I think it is a great idea. The DS80C400 needs external memory, and/or flash. It have the Ethernet integrated, but it is really slow (it is 8051 architecture), and yes, I know it can go up ti 75Mhz, but only gives 18MIPS max. I would use ATmega128 from atmel (16MIPS at only 16Mhz), take a look at: http://www.ethernut.de (project using mega128 with Ethernet, includes schematics). It can, in fact (personal experience) give about 0.7 instructions per clock cycle (media). About 11MIPS @ 16Mhz, or at 14.7456Mhz (for RS-232 standard speeds) 10.3MIPS. There is a free C compiler (very good, I must add). See: http://winavr.sf.net OR http://www.nongnu.org/avr-libc/ Also see: http://www.atmel.com and go the the products -> Microcontrollers -> AVR 8-bit RISC and take a look around. Or: http://www.avrfreaks.net/ (a users web site) If you like FPGAs and/or ASICs, you could go to: http://www.opencores.org Hope this may help you, I would take the project, but I have no time righ now. Maybe in about 1.5 months, when my degree work is done. c-ya! Ildefonso Camargo icamargo@unet.edu.ve ildefonso_camargo@yahoo.com>Message: 3 >Date: Tue, 19 Aug 2003 13:35:53 -0500 (CDT) >From: James Sharp <jsharp@psychoses.org> >To: asterisk-users@lists.digium.com >Subject: [Asterisk-Users] Oen source IP phone, maybe? >Reply-To: asterisk-users@lists.digium.com > > >Its another one of my "If I only had time...damn this sleep thing" ideas, >but I really wonder how hard/cost effective it would be to build an open >source IP phone or phone adapter (ala ATA). > >In about 20 minutes of mulling and research, I figure you could do it for >about $40 in parts plus coding time... > >1 DS80C400 Ethernet enabled microcontroller with built in IPV4/V6 stack >$10 >1 DSP56K hardware DSP (you may even be able to dispense with this if the >C400 is fast enough to do the codecing...then you just need a 8 or 16 bit >DAC/ADC) $10 >Misc parts/case/whatnot $20. > >
Steven Critchfield
2003-Aug-19 14:29 UTC
[Asterisk-Users] Re: Open source IP phone, maybe?
On Tue, 2003-08-19 at 16:06, Jose Ildefonso Camargo Tolosa wrote:> Hi! > > I think it is a great idea. > > The DS80C400 needs external memory, and/or flash. It have the Ethernet > integrated, but it is really slow (it is 8051 architecture), and yes, I > know it can go up ti 75Mhz, but only gives 18MIPS max. I would use > ATmega128 from atmel (16MIPS at only 16Mhz), take a look at: > http://www.ethernut.de (project using mega128 with Ethernet, includes > schematics).hmmm, The ATmega128 is one of the CPUs used in the MegaSquirt project to do fuel injection for cars. The other chip they used had to be programmed in assembly, while the ATmega128 allowed them to change to C and still be fast enough to control the fuel injectors on a car. -- Steven Critchfield <critch@basesys.com>
Ubicom's Scenix IP2K. Sxdesign has an SIP phone platform using that chip http://www.sxdesign.com/index.php?page=solutions&submnu=voip Jose Ildefonso Camargo Tolosa wrote:> Hi! > > I think it is a great idea. > > The DS80C400 needs external memory, and/or flash. It have the > Ethernet integrated, but it is really slow (it is 8051 architecture), > and yes, I know it can go up ti 75Mhz, but only gives 18MIPS max. I > would use ATmega128 from atmel (16MIPS at only 16Mhz), take a look at: > http://www.ethernut.de (project using mega128 with Ethernet, includes > schematics). > > It can, in fact (personal experience) give about 0.7 instructions per > clock cycle (media). About 11MIPS @ 16Mhz, or at 14.7456Mhz (for > RS-232 standard speeds) 10.3MIPS. > > There is a free C compiler (very good, I must add). See: > http://winavr.sf.net OR http://www.nongnu.org/avr-libc/ Also see: > http://www.atmel.com and go the the products -> Microcontrollers -> > AVR 8-bit RISC and take a look around. > > Or: http://www.avrfreaks.net/ (a users web site) > > If you like FPGAs and/or ASICs, you could go to: http://www.opencores.org > > Hope this may help you, I would take the project, but I have no time > righ now. Maybe in about 1.5 months, when my degree work is done. > > c-ya! > > Ildefonso Camargo > icamargo@unet.edu.ve > ildefonso_camargo@yahoo.com > >> Message: 3 >> Date: Tue, 19 Aug 2003 13:35:53 -0500 (CDT) >> From: James Sharp <jsharp@psychoses.org> >> To: asterisk-users@lists.digium.com >> Subject: [Asterisk-Users] Oen source IP phone, maybe? >> Reply-To: asterisk-users@lists.digium.com >> >> >> Its another one of my "If I only had time...damn this sleep thing" >> ideas, but I really wonder how hard/cost effective it would be to >> build an open source IP phone or phone adapter (ala ATA). >> >> In about 20 minutes of mulling and research, I figure you could do it >> for about $40 in parts plus coding time... >> >> 1 DS80C400 Ethernet enabled microcontroller with built in IPV4/V6 >> stack $10 >> 1 DSP56K hardware DSP (you may even be able to dispense with this if >> the C400 is fast enough to do the codecing...then you just need a 8 >> or 16 bit DAC/ADC) $10 >> Misc parts/case/whatnot $20. >> >> > > > > > _______________________________________________ > Asterisk-Users mailing list > Asterisk-Users@lists.digium.com > http://lists.digium.com/mailman/listinfo/asterisk-users >