[Asterisk-Users] Re: Open source IP phone, maybe?

[Jose Ildefonso Camargo Tolosa]

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 at unet.edu.ve
ildefonso_camargo at yahoo.com

>Message: 3
>Date: Tue, 19 Aug 2003 13:35:53 -0500 (CDT)
>From: James Sharp <jsharp at psychoses.org>
>To: asterisk-users at lists.digium.com
>Subject: [Asterisk-Users] Oen source IP phone, maybe?
>Reply-To: asterisk-users at 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.
>  
>