Re: [ECOS] USB MSD stack

[Andrew Lunn <andrew@lunn.ch>]

> So, at that level, I wouldn't have FATFS running locally on eCos (not when
> I'm allowing the host to access the local storage), I will interact directly
> at the block level with the storage device (RAM, flash, SD-Card, etc...).

O.K. That is a simple solution to avoid concurency problems.
 
> As I look at this, I am becoming more concerned about the HID requirements
> for our product because a) I still don't know what I don't know about it; b)
> I've read that it requires "interrupt" transfers; c) I've read that the eCos
> stack in the CVS tree doesn't include "interrupt" transfers; d) I know more
> about SCSI than I do about HID; and e) I don't know very much at all about
> SCSI :-)

You might also want to add to that list f) find out if USB allows a
device to be both MSD and HID at the same time. g) Find out if eCos
allows a device to be both MSD and HID at the same time. h) If not,
find out if eCos allows the device to dynamically change between HID
and MSD.

> All of that being said, I still need to finish the low level driver... off
> to coding land!

What device is this? It seems USB has become popular recently with
eCos. I know of three other device drivers in development at the
moment.

        Andrew

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