2009-07-01 04:02:30     Problems wirh MBW in spi_mmc_core.c

2009-07-01 04:02:30     Problems wirh MBW in spi_mmc_core.c

Patrick Hotz (GERMANY)

Message: 76563   

Hi,

i have a running uClinux2008R1 with a 2GB SD-Card over SPI.

If i run a program which is using much time to read and write data to RAM and want to save a file simultaneously to the SD-Card i get a failure "MBW FALIED!!!!!!!!!!!".

I have searched this error and found in "spi_mmc_core.c" a falue "MBW_ALLOWED".

Can i turn of this feature to write only one block after another to solve this problem? Or can i do anything else?

Regards,

Patrick

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2009-07-01 09:16:12     Re: Problems wirh MBW in spi_mmc_core.c

Mike Frysinger (UNITED STATES)

Message: 76594   

what exactly do you mean by "2008R1" ?  are you talking about the svn branch or an actual release ?  the SPI/MMC is known to have a lot of problems in the actual releases.

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2009-07-01 10:45:56     Re: Problems wirh MBW in spi_mmc_core.c

Patrick Hotz (GERMANY)

Message: 76597   

Hi Mike,

it is the 2008R1 release.

I have currently set the "MBW_ALLOWED" to "0" it seems to work better with my application.

Patrick