[ECOS] AT45xxxxx support

[ECOS] AT45xxxxx support

[Moussa A. Ba]

I found documentation on support for AT45xxxxx devices in the ecospro 
reference manual.  I cannot find anywhere the necessary drivers for this 
dataflash, am I missing something.  After some digging I came to the 
conclusion that using an spi driver in combination with the dataflash 
driver would allow me to get setup for a fs.  I apologize for these 
simple questions as I am quite new to the eCos universe.
That said, can someone point me to where I can find the drivers for this 
flash device?

Moussa

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Re: [ECOS] AT45xxxxx support

[Gary Thomas]

Moussa A. Ba wrote:
> I found documentation on support for AT45xxxxx devices in the ecospro 
> reference manual.  I cannot find anywhere the necessary drivers for this 
> dataflash, am I missing something.  After some digging I came to the 
> conclusion that using an spi driver in combination with the dataflash 
> driver would allow me to get setup for a fs.  I apologize for these 
> simple questions as I am quite new to the eCos universe.
> That said, can someone point me to where I can find the drivers for this 
> flash device?

Since you saw this in an eCosPro manual, try asking eCosCentric

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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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Re: [ECOS] AT45xxxxx support

[Moussa A. Ba]

I do remember seeing while searching for the driver that the AT45xxxx 
were supported by the AT49xxxx dataflash drivers.  If so where the spi 
dataflash drivers for the AT49 parts.  I have seen references to V2 
flash drivers, but cannot locate them.   Are you implying that they are 
only available from ecoscentric?

Moussa

Gary Thomas wrote:
> Moussa A. Ba wrote:
>> I found documentation on support for AT45xxxxx devices in the ecospro 
>> reference manual.  I cannot find anywhere the necessary drivers for 
>> this dataflash, am I missing something.  After some digging I came to 
>> the conclusion that using an spi driver in combination with the 
>> dataflash driver would allow me to get setup for a fs.  I apologize 
>> for these simple questions as I am quite new to the eCos universe.
>> That said, can someone point me to where I can find the drivers for 
>> this flash device?
>
> Since you saw this in an eCosPro manual, try asking eCosCentric
>


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Re: [ECOS] AT45xxxxx support

[Andrew Lunn]

On Mon, Jul 10, 2006 at 02:09:01PM -0400, Moussa A. Ba wrote:
> I do remember seeing while searching for the driver that the AT45xxxx 
> were supported by the AT49xxxx dataflash drivers.  If so where the spi 
> dataflash drivers for the AT49 parts.  I have seen references to V2 
> flash drivers, but cannot locate them.   Are you implying that they are 
> only available from ecoscentric?

The flash_v2 branch is available to everyone. Look at the
documentation of CVS for using branches.

              Andrew

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Re: [ECOS] AT45xxxxx support

[Moussa Ba]

Thank you, I have since found it and used it, unfortunately it took a 
while to get it right as there are no examples of dataflash 
instantiation anywhere in the CVS, I found some in the mailing list, but 
I think they were incorrect and not up to date, specifically they 
included a #define _FLASH_PRIVATE_ in the file doing the instantiation 
which caused the compiler to complain about not finding CYG_FLASH_WIDTH 
and CYG_FLASH_INTERLEAVE... I have removed it and seem to be doing okay, 
I used the driver successfully directly, now I have integrated it with 
the CYG_IO_FLASH and I am about to test it via the IO_FLASH interface.

Can you recommend a simple file system( it can even be flat) that I 
could use, I now ramfs and JFFS2 are available but I am afraid that the 
part I am using is too low in RAM to support it.

Moussa

Andrew Lunn wrote:
> On Mon, Jul 10, 2006 at 02:09:01PM -0400, Moussa A. Ba wrote:
>   
>> I do remember seeing while searching for the driver that the AT45xxxx 
>> were supported by the AT49xxxx dataflash drivers.  If so where the spi 
>> dataflash drivers for the AT49 parts.  I have seen references to V2 
>> flash drivers, but cannot locate them.   Are you implying that they are 
>> only available from ecoscentric?
>>     
>
> The flash_v2 branch is available to everyone. Look at the
> documentation of CVS for using branches.
>
>               Andrew
>
>   


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