c8051f320 Mass storage Source Code

Howdy All,

I just purchased an Evaluation Board from Silicon Labs. Does anyone
know where I can get example source code for a Mass Storage class for
c8051f320?

I have tried the firmware generator from Jungo, but it keeps create an
"Unknown Device"


Thanks in advance.

Hello !

<steele.pj@gmail.com> wrote in message 
news:1135868117.479218.151680@g44g2000cwa.googlegroups.com...
> Howdy All,
>
> I just purchased an Evaluation Board from Silicon Labs. Does anyone
> know where I can get example source code for a Mass Storage class for
> c8051f320?
>

Unfortunately I cannot assist you here. I mostly write my own firmware. You 
could try requesting a skeleton firmware from Silicon Labs. and then 
modifying it to suit your needs. Afterall, a Mass Storage class device is 
only different from a HID device because the device and interface 
descriptors say they are. The default Windows XP drivers, for example, 
support Mass Storage class devices by default.

>
> I have tried the firmware generator from Jungo, but it keeps create an
> "Unknown Device"
>

The firmware generator might not create the string descriptors required, 
even if it would create a solid skeleton firmware for a Mass Storage class 
device. The Device, Configuration and Interface Descriptors make use of a 
String Descriptor table that presents the human-readable strings which an 
operating system shows during device enumeration. These strings dictate 
manufacturer name, device name and possible device version etc. Make sure 
these strings are correctly initialized and set (they are UNICODE strings).

Greetings,
Antti Keskinen 

Thanks Antti. I will contact SiLabs and see what they say.

Antti is correct, the descriptors indicate that the device is a mass
storage class.  You will probably find, though that the mass storgage
device uses transactions other than control type.  For example, disk
drive devices typically use bulk transport.

If you haven't already, be sure to find a specification for the
protocols that your device is using.  While the spec doesn't usually
provide a code example, it does contain the information necessary to
interpret what is happening.

Also, if you haven't downloaded it yet, usb snoopy is a very helpfull
program for capturing and interpreting working USB transactions to see
how Winhose or Linux does things.  I believe it is available on
Sourceforge.