I was trying to build a datalogger which writes data into a USB thumb drive, are there any 8bit micros out there that can directly write to a FAT formatted thumbdrive? The only other chip I know of is the VNC1L from ftdi, which is great except that I can't write custom firmware for it and will need yet another micro to control it. (also a micro that has a free compiler toolchain would be great)
writing to a thumbdrive from a 8bit micro
Started by ●June 18, 2007
Reply by ●June 18, 20072007-06-18
shinystartrek@gmail.com wrote:> I was trying to build a datalogger which writes data into a USB thumb > drive, are there any 8bit micros out there that can directly write to > a FAT formatted thumbdrive? > > The only other chip I know of is the VNC1L from ftdi, which is great > except that I can't write custom firmware for it and will need yet > another micro to control it. > > (also a micro that has a free compiler toolchain would be great)Have a look at: USB Flash Drive interface for existing products. http://www.dontronics-shop.com/product.php?productid=16654 Don... -- Don McKenzie Site Map: http://www.dontronics.com/sitemap E-Mail Contact Page: http://www.dontronics.com/email No More Damn Spam: http://www.wizard-of-oz.com
Reply by ●June 19, 20072007-06-19
<shinystartrek@gmail.com> skrev i meddelandet news:1182186736.765692.166540@q69g2000hsb.googlegroups.com...>I was trying to build a datalogger which writes data into a USB thumb > drive, are there any 8bit micros out there that can directly write to > a FAT formatted thumbdrive? > > The only other chip I know of is the VNC1L from ftdi, which is great > except that I can't write custom firmware for it and will need yet > another micro to control it. > > (also a micro that has a free compiler toolchain would be great) >AT90USB1287 has an USB Host w Software (actually an OTG) -- Best Regards, Ulf Samuelsson This is intended to be my personal opinion which may, or may not be shared by my employer Atmel Nordic AB
Reply by ●June 19, 20072007-06-19
Don McKenzie wrote:> shinystartrek@gmail.com wrote: > >> I was trying to build a datalogger which writes data into a USB thumb >> drive, are there any 8bit micros out there that can directly write to >> a FAT formatted thumbdrive? >> >> The only other chip I know of is the VNC1L from ftdi, which is great >> except that I can't write custom firmware for it and will need yet >> another micro to control it. >> >> (also a micro that has a free compiler toolchain would be great) > > > Have a look at: > USB Flash Drive interface for existing products. > http://www.dontronics-shop.com/product.php?productid=16654 > > Don...That's a nice product. One question, can it sustain a write speed of about 35 KiByte per sec to a USB flash drive? That would help me out in the future for adding a log-device to a product. Best Regards, Edwin van den Oetelaar
Reply by ●June 19, 20072007-06-19
Edwin van den Oetelaar wrote:> Don McKenzie wrote: > >> shinystartrek@gmail.com wrote: >> >>> I was trying to build a datalogger which writes data into a USB thumb >>> drive, are there any 8bit micros out there that can directly write to >>> a FAT formatted thumbdrive? >>> >>> The only other chip I know of is the VNC1L from ftdi, which is great >>> except that I can't write custom firmware for it and will need yet >>> another micro to control it. >>> >>> (also a micro that has a free compiler toolchain would be great) >> >> >> >> Have a look at: >> USB Flash Drive interface for existing products. >> http://www.dontronics-shop.com/product.php?productid=16654 >> >> Don... > > > That's a nice product. > One question, can it sustain a write speed of about 35 KiByte per sec to > a USB flash drive? > That would help me out in the future for adding a log-device to a product. > Best Regards, > Edwin van den OetelaarHi Edwin, you would need to chack the data sheets All Documents can be found at: http://www.vinculum.com/documents.html if you can't find what you need there, the manufactureres have good support, so ask directly. Cheers Don... -- Don McKenzie Site Map: http://www.dontronics.com/sitemap E-Mail Contact Page: http://www.dontronics.com/email No More Damn Spam: http://www.wizard-of-oz.com USB Flash Drive interface for existing products. http://www.dontronics-shop.com/product.php?productid=16654
Reply by ●June 19, 20072007-06-19
I was looking for an alternative to VNC1L, not a product that has VNC1L inside!! On Jun 18, 1:17 pm, Don McKenzie <l...@mysig.com> wrote:> shinystart...@gmail.com wrote: > > I was trying to build a datalogger which writes data into a USB thumb > > drive, are there any 8bit micros out there that can directly write to > > a FAT formatted thumbdrive? > > > The only other chip I know of is the VNC1L from ftdi, which is great > > except that I can't write custom firmware for it and will need yet > > another micro to control it. > > > (also a micro that has a free compiler toolchain would be great) > > Have a look at: > USB Flash Drive interface for existing products.http://www.dontronics-shop.com/product.php?productid=16654 > > Don... > > -- > Don McKenzie > > Site Map: http://www.dontronics.com/sitemap > E-Mail Contact Page:http://www.dontronics.com/email > No More Damn Spam: http://www.wizard-of-oz.com
Reply by ●June 19, 20072007-06-19
On Jun 19, 3:15 pm, shinystart...@gmail.com wrote:> I was looking for an alternative to VNC1L, not a product that has > VNC1L inside!!Well okay then. How about replacing the thumb drive with a plain flash memory card of similar price, that you can then read with a $5 USB reader or directly in many laptopts and even some desktops. Research the card formats, some talk SPI. A degeneate FAT file system isn't too bad if the micro always does the writing and formatting and windows only reads it. But if you let windows write to it, then life gets hard for the micro as you have to implement the full file system with fragmentation.
Reply by ●June 19, 20072007-06-19
shinystartrek@gmail.com wrote:>I was looking for an alternative to VNC1L, not a product that has >VNC1L inside!!If you aren't willing to use a VNC1L, your choices are: Find a chip that you *do* like. AT89C5131 perhaps. Google is your friend: http://www.google.com/search?q=microcontroller+%22onboard+usb%22 Use an embedded PC-on-a chip system. Write bit banging code to do it on the micro of your choice -- a lot of work and the result will be slow.
Reply by ●June 19, 20072007-06-19
shinystartrek@gmail.com wrote:>I was looking for an alternative to VNC1L, not a product that has >VNC1L inside!!Please don't top-post. Quoting Style in Newsgroup Postings http://www.xs4all.nl/%7ewijnands/nnq/nquote.html How do I quote correctly in usenet? http://www.netmeister.org/news/learn2quote2.html Common Mistakes in Usenet Postings and How to Avoid Them http://www.complang.tuwien.ac.at/anton/mail-news-errors.html#quoting Bottom vs. top posting and quotation style on Usenet http://www.cs.tut.fi/~jkorpela/usenet/brox.html Why bottom-posting is better than top-posting http://www.caliburn.nl/topposting.html +What do you mean "my reply is upside-down"? http://www.i-hate-computers.demon.co.uk/quote.html
Reply by ●June 19, 20072007-06-19
