Date: Mon, 1 Oct 2001 01:24:23 +0200 From: "Karsten W. Rohrbach" <karsten@rohrbach.de> To: Devin Butterfield <dbutter@wireless.net> Cc: Bart Kus <bsd@shell-server.com>, Bakul Shah <bakul@bitblocks.com>, hackers@FreeBSD.ORG Subject: Re: precise timing Message-ID: <20011001012423.B74962@mail.webmonster.de> In-Reply-To: <200109301933.f8UJXQl74336@db.wireless.net>; from dbutter@wireless.net on Sun, Sep 30, 2001 at 12:33:26PM -0700 References: <200109301730.NAA29134@thunderer.cnchost.com> <200109301311.5635@EO> <200109301933.f8UJXQl74336@db.wireless.net>
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--A6N2fC+uXW/VQSAv Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Devin Butterfield(dbutter@wireless.net)@2001.09.30 12:33:26 +0000: > [...] > > > was suggested you may want to consider a dedicated cpu based > > > controller. Thre are a number of solutions for hobbyists > > > (such as the handyboard, see www.handyboard.com). > > > > Unfortunately, money is a big factor. So that's not an option. :/ > > >=20 > Atmel AVR microcontrollers are < $10 from distributors like Digikey (and= =20 > Digikey usually has high prices). They're very slick and VERY FAST. You c= an=20 > do 12 MIPS with one of their chips. i can second that. a good friend of mine is implementing particle accelerator control units on the avr series and is very content with features, performance and overall development/deployment cost. basically they seem to be standard 16bit arm thumb platforms, with=20 memory and interface configurations being the only varying features. > Of course you'd need to spend some time learning their instruction=20 > sets/learning how to code in C for them. There is a C compiler in the por= ts=20 > named avr-gcc to do just that. what i have seen from the development environment under win32 (yes, yes, i know...) the gcc generates code with a quite good quality and performance, some bugs included but well documented, and the in system programmer frontend 'pony prog' being pretty good as well. i also find it appealing that the avr series has onchip flash/eeprom and can be programmed via the isp bus even if one managed to screw up the boot code completely -- this reduces development costs and time dramatically ;-) /k --=20 > "Her figure described a set of parabolas that could cause cardiac arrest > in a yak." --Woody Allen KR433/KR11-RIPE -- WebMonster Community Founder -- nGENn GmbH Senior Techie http://www.webmonster.de/ -- ftp://ftp.webmonster.de/ -- http://www.ngenn.n= et/ karsten&rohrbach.de -- alpha&ngenn.net -- alpha&scene.org -- catch@spam.de GnuPG 0x2964BF46 2001-03-15 42F9 9FFF 50D4 2F38 DBEE DF22 3340 4F4E 2964 B= F46 Please do not remove my address from To: and Cc: fields in mailing lists. 1= 0x --A6N2fC+uXW/VQSAv Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (FreeBSD) Comment: For info see http://www.gnupg.org iD8DBQE7t6mnM0BPTilkv0YRAnywAJ9y5/gw5ZUzh+C69ohchimtyNahfwCgjs6c vgdFwheuUVKLsNwUxQDmLKQ= =PYPa -----END PGP SIGNATURE----- --A6N2fC+uXW/VQSAv-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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