PORTS Forum
Ports and Interfaces => USB => Topic started by: jbrady on August 04, 2010, 05:50:37 pm
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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
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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
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Also - Microchip's Applications Library includes a USB mass storage data logger application.
Jan