Mouting/Using SD-Card

    I am trying to mount the bundled 1 GB SD-Card under emlix, but without any success up to this point in time. When I plug in the card on the NetDCU-Board, nothing happens (dmesg doesn´t show any changes). What modules are needed to use the SD-Card, do I need to install additional drivers for the SD-Card-Slot?

    Hello,


    you need the drivers:


    insmod /lib/modules/${kernelver}/kernel/fs/fat/fat.ko
    insmod /lib/modules/${kernelver}/kernel/fs/vfat/vfat.ko
    insmod /lib/modules/${kernelver}/kernel/fs/msdos/msdos.ko
    insmod /lib/modules/${kernelver}/kernel/fs/ext2/ext2.ko


    insmod /lib/modules/${kernelver}/kernel/drivers/mmc/core/mmc_core.ko
    insmod /lib/modules/${kernelver}/kernel/drivers/mmc/card/mmc_block.ko
    insmod /lib/modules/${kernelver}/kernel/drivers/mmc/host/s3cmci.ko


    then you can mount the SD card:


    mount -o rw /dev/mmcblk0p1 /mountpoint


    After that the SD card should be available

    The following drivers are missing in my emlix:


    .../kernel/fs/msdos/msdos.ko
    .../kernel/fs/ext2/ext2.ko
    .../kernel/drivers/mmc/core/mmc_core.ko
    .../kernel/drivers/mmc/card/mmc_block.ko
    .../kernel/drivers/mmc/host/s3cmci.ko


    Do I need to compile a completely new kernel?


    Regards,
    Patrick

    Hello,


    that depends on the kernel you use.
    If you use the default kernel, that is delivered in the BSP, you can find the modules in:


    bsp/sysroot/lib/modules/kernelversion/kernel/drivers...


    If you use a self compiled kernel, you have to compile the kernel modules new!


    Good Luck,


    Gunther

    Hi Gunther,


    I had a look at my BSP and found all the modules you mentioned above. So copying the files to the expected directories on the NetDCU is enough to run a simple modprobe and use the SD-Card?


    Thanks! :)


    Patrick

    Hi Patrick,


    if you use the kernel, emlix delivered with the BSP, this should be enough.
    You can take a look to the file:


    /lib/modules/kernelversionxxx/modules.dep


    on the target filesystem. Here are all dependencies of loadable kernel modules.
    This is the way, the insmod (modprobe) tries to locate and load kernel modules.


    Good luck,


    Gunther