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Load FS via MMCSD1

barry mohan
Intellectual 580 points

Hi E2E'rs

Can the Linux Kernel in the eXperimenter load the FS (file system image) from MMCSD1 ?

The default configuration uses MMCSD0. However we also wish to configure EMIFA and this clashes with pins on MMCSD0.

The scenario we are trying to achieve is

1 ; Boot from MMCDS0 (as MMCDS1 boot appears not to be supported - WHY ?)

2: Dynamically after boot we wish to access the FS using MMCSD1 whilst maintaining the use of EMIF A.

BR

Barry

  • 0
    TI__Genius 17355 points

    Barry,

    There are a number of pieces of software at various levels that would need to be modified to support using MMCSD1 in place of MMCSD0, but as the items are software, and source should be available for these components, this effort is certainly possible.

    At the lowest level of the boot process, when the ROM boot loader tries to load and run code, MMCSD1 is not supported, so you would need to use some other interface to start the boot from.  I would recommend a cheap and simple SPI flash in place of a separate MMC or SD memory device attached to MMCSD0.

    Regards, Daniel

  • 0 in reply to Daniel Allred
    Intellectual 580 points

    Hi Daniel

    Funny you should say that ..:)

    At the moment I'm developing an SPI interface.

    Many Thanks for the feedback on the original email Daniel

    BR

    Barry