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Boot RTOS on C6748 from eMMC and use remainder of eMMC for a file system

karl hoover
Prodigy 40 points
Other Parts Discussed in Thread: OMAPL138

Hello All,

We're running RTOS on a C6748. Non-volatile storage is a Greenliant 4 Gbyte eMMC memory.

I understand that the C6748 supports eMMC 4.2 but not eMMC 4.3 as clarified in this thread:

http://e2e.ti.com/support/dsp/tms320c6000_high_performance_dsps/f/115/t/301732

...and that it can boot only in '1-bit mode' and that furthermore somehow we can reconfigure to access the eMMC in 8-bit mode after booting as briefly described here:

http://e2e.ti.com/support/dsp/omap_applications_processors/f/42/t/289684  (although this refers to omapl, not c6000)

 But how do we do this? Can somebody provide concrete instructions on just what to do to accomplish this?

And once the eMMC has been configured, can the region of the eMMC beyond the boot image be treated as a file system or does that imply we need 'boot partitioning' support of eMMC 4.3?

Best regards,

Karl





  • 0
    TI__Guru** 116100 points
    Hi Karl,

    The OMAPL138's eMMC spec is also applicable to C6748 device.

    http://e2e.ti.com/support/dsp/omap_applications_processors/f/42/p/255685/921628#921628

    http://processors.wiki.ti.com/index.php/Managed_NAND
  • 0
    Genius 3500 points

    Hi Karl,

         I'm facing the same problem with you. Have you solved your problem?

         1.  How to " reconfigure to access the eMMC in 8-bit mode after booting"

    Can somebody provide concrete instructions on just what to do to accomplish this?

         2. And once the eMMC has been configured, can the region of the eMMC beyond the boot image be treated as a file system or does that imply we need 'boot partitioning' support of eMMC 4.3?

         Thank you.

    Frank