Author Topic: Mass storage chip  (Read 7883 times)

jbrady

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Mass storage chip
« on: August 04, 2010, 05:50:37 pm »
Hello -----

I am thinking about designing a small data-logger with USB that appears like a flash drive when you plug it into a PC.  For simplicity, I do not want to make users install a USB driver on the PC, but rather use the standard Windows mass storage driver, I think it is usbstor.sys

I have used FTDI parts like the FT232 before but don't think they can work like this - you need to install one of their drivers. So does anyone know of a fairly low cost solution, like a chip or chip+stack to do this ?

Jim

Jan Axelson

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Re: Mass storage chip
« Reply #1 on: August 04, 2010, 10:37:01 pm »
My mass storage page has links to chips, reference designs, and firmware stacks:

http://www.lvr.com/mass_storage.htm#Devices

I can't think of anything offhand that isolates you from the protocols as FTDI's chips do.

To prevent problems, disable data logging when the drive is attached to a USB host.

Another option would be to use a host module like the USBwiz or Vinculum with a flash drive that users move between the logger and the PC.

Jan
« Last Edit: August 04, 2010, 11:12:03 pm by Jan Axelson »

Jan Axelson

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Re: Mass storage chip
« Reply #2 on: August 05, 2010, 10:50:51 am »
Also - Microchip's Applications Library includes a USB mass storage data logger application.

Jan