Since I'm currently prototyping, and I don't know if the project will go commersial or not (big chance though) I dont want to pay too much for something that might end up in the bin (prices I have seen ranges up to $6000 for a fat-implementation). Currently what I have been seeing of the various FAT-implementations is that they demand quite a lot of RAM, for the sector-buffer, and I don't think I have that much left. It seems that these FATonChips has very short life-span, so I might end up with getting a library and putting it into another 8622 as a co-proc. Anyway as I see it if I'm using a chip like the ALFAT, I don't need to re-design my prototype at the moment, only to do a piggy-back card with the chip on. Also I don't need to bother about finding faults in the code, which means that I can concentrate on the more important stuff at the moment. = With best regards Tomas Larsson Sweden http://www.tlec.se http://www.ktl.mine.nu http://www.naks.mine.nu for downloads etc. ftp://ftp.servage.net for uploads use "naks" as both password and username. Or you can use the free www.yousendit.com service. http://www.servage.net/?coupon=3Dcust23962 Verus Amicus Est Tamquam Alter Idem = > = > -----Original Message----- > From: piclist-bounces@mit.edu = > [mailto:piclist-bounces@mit.edu] On Behalf Of Samuel BOUQUET > Sent: Monday, December 04, 2006 3:54 PM > To: 'Microcontroller discussion list - Public.' > Subject: RE : [PIC] Mass storage > = > Hi!! > = > I've already have a look on the alfat, and don't know DosOnchip. > Those products are quite similar. > The only thing which hurt me is the longevity of those product. > What happen if those one's disapearred in one or two years? > = > That's another reason why I'm quite agree with Matt Pobursky. = > Here is an open project for FAT 16 on Pic (in french), but it's not > finished: > http://www.digitalspirit.org/wiki/projets/fatonpic > There is only a read mode, write mode is not finished > = > Matt> How much rom and ram do you need for this stuff on a = > PIC18? What = > Matt> was > you're PIC18 and wich frequency? > = > SamB > = > -----Message d'origine----- > De : piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] = > De la part de Matt Pobursky Envoy=E9 : dimanche 3 d=E9cembre 2006 = > 17:03 =C0 : Microcontroller discussion list - Public. > Objet : Re: [PIC] Mass storage > = > = > On Sun, 03 Dec 2006 08:47:23 -0500, Victor Fraenckel wrote: > > Tomas, > > > > You might have a look at this: > > > > http://www.sparkfun.com/commerce/product_info.php?products_id=3D7955 > > > > About the same price as the ALFAT unit. > > > > I,too, am looking for a mass storage device and I am = > looking at both = > > the ALFAT and the DOSonCHIP unit. I haven't yet decided = > which one to = > > try so I have no direct experience using either. > > > > HTH, > > > > Vic > > > > > > Tomas Larsson wrote: > >> Looking to implement a mass-storage device into my project. Found = > >> something called ALFAT at http://www.ghielectronics.com Anyone got = > >> any experience of this > >> > = > Another alternative (if you've got a PIC or other MPU with enough > resources) is including the hardware/software interface in = > your own hardware design. > = > I've used this library before on several MPUs and it's a quality > product: > = > http://www.prllc.com/productcart/pc/viewCat_P.asp?idCategory=3D10 > = > It's show as an AVR library [Dave VH ought to like that ;-)] = > but it's easily ported to any MPU with the resources and a = > decent C compiler. I've ported it successfully to the PIC18, = > MSP430, Rabbit and ARM families. > = > At about $30-40 a pop, the hardware based ALFAT or DOSonCHIP = > is probably okay for a one-off but the fairly low cost and = > no-royalties of the PRLLC library starts to look real good at = > just a few units volume. Hmmm, I just checked the site and = > see they've raised the price to $199 since I purchased the = > library a few years ago (I think I paid $139). That said, I'd = > still buy it at $199 as it's very solid code, full featured = > and well documented. > = > Matt Pobursky > Maximum Performance Systems > = > = > -- > http://www.piclist.com PIC/SX FAQ & list archive View/change = > your membership options at = > http://mailman.mit.edu/mailman/listinfo/piclist > = > = > = > = > -- = > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > = -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist