On Nov 22, 6:37=A0pm, Vladimir Vassilevsky <nos...@nowhere.com> wrote:
> John wrote:
> > On Nov 22, 5:14 pm, Vladimir Vassilevsky <nos...@nowhere.com> wrote:
>
> >>Jason wrote:
>
> >>>On Nov 20, 11:45 am, Vladimir Vassilevsky <nos...@nowhere.com> wrote:
>
> >>>>According to the meager description in the SPRUFL6E datasheet, the EM=
IFA
> >>>>of TMS 674x/OMAP supports hardware ECC for NAND flash pages up to 512=
 bytes.
>
> >>>>Would it be possible to use the hardware ECC facility for larger page=
s
> >>>>by restarting the ECC calculation at every 512 bytes of transfer? Or
> >>>>will I have to do everything in the software?
>
> >>>Sounds like a good question for TI support. They are actually pretty
> >>>responsive and knowledgeable on their forums:http://e2e.ti.com
>
> >>Sounds like insoluble question for TI support. Based on the previous
> >>experience, I doubt there will be anything useful from them.
>
> > How many devices will you be buying?
>
> How many do you think would be enough to get support from real DSP
> engineers? I tried going through regional FAEs, too.
>
> VLV

Less than 100k is what I always say.

Vladimir Vassilevsky wrote:

> 
> According to the meager description in the SPRUFL6E datasheet, the EMIFA 
> of TMS 674x/OMAP supports hardware ECC for NAND flash pages up to 512 
> bytes.
> 
> Would it be possible to use the hardware ECC facility for larger pages 
> by restarting the ECC calculation at every 512 bytes of transfer? Or 
> will I have to do everything in the software?

TI support must be parsing comp.dsp.

A large page should be read or written as several chunks of 512 bytes. 
Each chunk should be arranged as complete data transfer with ECC 
calculation. Daniel Allred from TI pointed me to Linux kernel source as 
an example.

VLV

John wrote:

> On Nov 22, 5:14 pm, Vladimir Vassilevsky <nos...@nowhere.com> wrote:
> 
>>Jason wrote:
>>
>>>On Nov 20, 11:45 am, Vladimir Vassilevsky <nos...@nowhere.com> wrote:
>>
>>>>According to the meager description in the SPRUFL6E datasheet, the EMIFA
>>>>of TMS 674x/OMAP supports hardware ECC for NAND flash pages up to 512 bytes.
>>
>>>>Would it be possible to use the hardware ECC facility for larger pages
>>>>by restarting the ECC calculation at every 512 bytes of transfer? Or
>>>>will I have to do everything in the software?
>>
>>>Sounds like a good question for TI support. They are actually pretty
>>>responsive and knowledgeable on their forums:http://e2e.ti.com
>>
>>Sounds like insoluble question for TI support. Based on the previous
>>experience, I doubt there will be anything useful from them.
>> 
> How many devices will you be buying?

How many do you think would be enough to get support from real DSP 
engineers? I tried going through regional FAEs, too.

VLV

On Nov 22, 5:14=A0pm, Vladimir Vassilevsky <nos...@nowhere.com> wrote:
> Jason wrote:
> > On Nov 20, 11:45 am, Vladimir Vassilevsky <nos...@nowhere.com> wrote:
>
> >>According to the meager description in the SPRUFL6E datasheet, the EMIF=
A
> >>of TMS 674x/OMAP supports hardware ECC for NAND flash pages up to 512 b=
ytes.
>
> >>Would it be possible to use the hardware ECC facility for larger pages
> >>by restarting the ECC calculation at every 512 bytes of transfer? Or
> >>will I have to do everything in the software?
>
> > Sounds like a good question for TI support. They are actually pretty
> > responsive and knowledgeable on their forums:http://e2e.ti.com
>
> Sounds like insoluble question for TI support. Based on the previous
> experience, I doubt there will be anything useful from them.
>
> VLV

How many devices will you be buying?

Jason wrote:

> On Nov 20, 11:45 am, Vladimir Vassilevsky <nos...@nowhere.com> wrote:
> 
>>According to the meager description in the SPRUFL6E datasheet, the EMIFA
>>of TMS 674x/OMAP supports hardware ECC for NAND flash pages up to 512 bytes.
>>
>>Would it be possible to use the hardware ECC facility for larger pages
>>by restarting the ECC calculation at every 512 bytes of transfer? Or
>>will I have to do everything in the software?
>>
> 
> Sounds like a good question for TI support. They are actually pretty
> responsive and knowledgeable on their forums: http://e2e.ti.com

Sounds like insoluble question for TI support. Based on the previous 
experience, I doubt there will be anything useful from them.

VLV

On Nov 20, 11:45=A0am, Vladimir Vassilevsky <nos...@nowhere.com> wrote:
> According to the meager description in the SPRUFL6E datasheet, the EMIFA
> of TMS 674x/OMAP supports hardware ECC for NAND flash pages up to 512 byt=
es.
>
> Would it be possible to use the hardware ECC facility for larger pages
> by restarting the ECC calculation at every 512 bytes of transfer? Or
> will I have to do everything in the software?
>
> Vladimir Vassilevsky
> DSP and Mixed Signal Design Consultanthttp://www.abvolt.com

Sounds like a good question for TI support. They are actually pretty
responsive and knowledgeable on their forums: http://e2e.ti.com

Jason

According to the meager description in the SPRUFL6E datasheet, the EMIFA 
of TMS 674x/OMAP supports hardware ECC for NAND flash pages up to 512 bytes.

Would it be possible to use the hardware ECC facility for larger pages 
by restarting the ECC calculation at every 512 bytes of transfer? Or 
will I have to do everything in the software?


Vladimir Vassilevsky
DSP and Mixed Signal Design Consultant
http://www.abvolt.com