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TDA4VM: Can I access data on SD card in the Uboot environment ?

AllenHsu
Intellectual 980 points
Part Number: TDA4VM

Hi,

We want to update the firmware in the Uboot environment, so we need to access ext4 for rootfs partition and vfat partition for BOOT on the SD card.
Is there any relevant information available for reference?

1. ext4 

2. vfat

  • 0
    TI__Mastermind 42515 points

    Hi Allen,

    you can try the following:

    fatwrite mmc 0 <addr> <filename> <size>

    this will write contents from <addr> in the memory with given size to a file <filename> on the FAT partition.

    Basically this is copying from RAM to SD card.

    You can read:

    fatload mmc 0 <loadaddr> <filename>

    this copies contents of the file to RAM.

    There is a similar interface to EXT4 partitions: ext4write/ext4load.

    Regards,

    Yordan

  • 0 in reply to Yordan Kamenov
    Intellectual 980 points

    Hi Yordan,

    mmc list
    sdhci@4f80000: 0 (eMMC)
    sdhci@4fb0000: 1 (SD)

    So I need to change the parameter from 0 to 1, then the command can work correctly.

    fatls mmc 1

    Thank you for your help.