Re: USB mass storage package (slave side).

[John Dallaway <john@dallaway.org.uk>]

Hi Christophe

Christophe Coutand wrote:

> There has been some request for a USB mass storage package (slave side).
> This was tested on AT91 architecture with the AT91 eCos USB device
> driver. Some patches are required to the AT91 USB device driver for this
> package to work properly. If anyone has the possibility to test it with
> other architecture it would be most welcome.

I've been working with Chris Holgate (and Ilija Stanislevik) to get his
STM32 USB slave device driver ready for check-in:

  http://bugs.ecos.sourceware.org/show_bug.cgi?id=1001024

Once this is checked-in, I plan to look at your MSD function driver.

One immediate issue is that the STM32 USB slave device driver uses
dynamic I/O endpoint configuration and does not provide the endpoint
devtab entries which are required by your driver. Looking at your code,
it seems that the endpoint devtab entries are only used to look up the
endpoint structures within usbs_msd_init():

  tab = usbs_msd_lookup( tx_ep_dev_name );
  msd->tx_ep     =  (usbs_tx_endpoint *) tab->priv;

  tab = usbs_msd_lookup( rx_ep_dev_name );
  msd->rx_ep     =  (usbs_rx_endpoint *) tab->priv;

So it seems it should be easy to eliminate the requirement for these
devtab entries. Have I understood correctly?

John Dallaway
eCos maintainer