Posted on July 01, 2005 at 19:00Hello Sjo and to all of you ot the forum (thank you Smart)
ST gave me ST72651 mass storage firmware, and I studied it to understand how to port it to STR71x...
If you bear with me, I try to summarize what I have understood...
The code implements a device able to interface different kind of mass storage.
It looks like not all the source is available as, for instance, I cound not find the definition of Vec_main (in the main.c module). . Other missing functions are some SCSI functions.
The USB protocol is managed by modules which are mostly written in assembler.. It implements end point 0. plus other 5 end point. It looks like only end point 2 is used for mass storage. At least the BOT_Action function does the necessary interworking between the USB protocol end point 2 and the mass storage drivers, through the SCSI module which contains the RBC commands interpreter.
The SCSI module should interwork with the different mass storage (MAL), but the missing functions do not make clear where and how they interfaces for instance the MMC module.
The MMC module implements interfacing with MMC mass storage through the DTC.
As conclusion these modules cannot be used as they are because or are they written in assembler or are using directly hardware registers and specialized processor as the DTC. However they may help to understand and evaluate the complexity of the implementation and above all to solve any problem wich may arise during design or testing.
So, have you any suggestion?
Is there the possibility to abbreviate the distance?
I hope that it could be possible ...
ciao
DiGi
