USB stick to AVR?

Log in or register to post comments
Go To Last Post
5 posts / 0 new
Author
Message
RES
RES's picture
Level: Resident
Joined: Sat. Dec 31, 2005
Posts: 724 View posts
#1
Posted by RES: Mon. Jul 19, 2010 - 06:19 PM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Is it possible to interface and control a USB stick (for example 1GB USB 2.0) to a USB AVR? (AT90USB162?)

RES

Tags:

AVR Microcontrollers, megaAVR and tinyAVR, AT90USB162
Top
Bronze Markbobgardner
bobgardner's picture
Level: 10k+ Postman
Joined: Wed. Sep 4, 2002
Posts: 26609 View posts
Location: Orlando Florida
Posted by bobgardner: Mon. Jul 19, 2010 - 06:54 PM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

sd and mmc cards are easier... spi interface instead of host usb

Imagecraft compiler user

Top
jayjay1974
jayjay1974's picture
Level: Raving Lunatic
Joined: Wed. Oct 30, 2002
Posts: 5763 View posts
Location: The Netherlands
Posted by jayjay1974: Mon. Jul 19, 2010 - 07:24 PM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

You would need a USB-host capable AVR for that, the USB647 or USB1287.

IIRC, LUFA provides an example.

Top
dak664
dak664's picture
Level: Raving Lunatic
Joined: Sun. Jun 15, 2008
Posts: 2118 View posts
Location: North Carolina USA
Posted by dak664: Mon. Jul 19, 2010 - 07:37 PM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Agree SD is simpler, I have an ATTiny85 logging to 4GB transflash in an SD adapter, using readonly FatFS to position within an existing file for sector rewrites. Swap it to a USB adapter for PC readout.
Another possibility to have the AVR *be* the USB storage device, log to flash if no host detected, else enumerate as mass storage. The AT90USB1287 can allocate 100KB or so for that.

Top
jayjay1974
jayjay1974's picture
Level: Raving Lunatic
Joined: Wed. Oct 30, 2002
Posts: 5763 View posts
Location: The Netherlands
Posted by jayjay1974: Tue. Jul 20, 2010 - 07:21 PM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Quote:
Another possibility to have the AVR *be* the USB storage device, log to flash if no host detected, else enumerate as mass storage

That's what I did with my GPS logger. I wrote a simple single file filing system that uses a DataFlash circularly. When connected to a PC it on the fly emulates FAT16.

Top