SD card not detected after software reboot

  • Hello Support Team,


    In our machine with efusA9X module, we are using SD card port connected to SD_B lines of efus QBliss connector. Image used is compiled from BSP. When machine is powered on, SD card is recognised by system and accessed in filesystem at \SDCard. But, if we reset hardware on reset button, or reboot it from ndcucfg (so, power does not get removed), SD card is no more available after reboot. If I reinsert the card, nothing happens, but if I reboot the machine after card reinsertion, SD card shows up.


    That made me think the issue is related with SD_B_CD line handling. So I tried to enable internal pull up on this line (pin 83 on QBliss), using DIGITALIO driver and its PullUpX registry entry. When I enabled this pull up, the situation changed slightly and SD card became plug&play: if I remove it, it disappears from system automatically, and if I insert it back, it shows up. Alas, after reboot, it still does not get detected (and reinsertion does not help now).


    What could be the problem here? Is there some configuration setting I may be missing?


    Thanks in advance.


    Best regards,


    Miodrag Bazdar

  • Dear Support Team,


    I have completely the same problem when using starter kit: SD card (in SD slot) is present in system after power up, but not after reboot of pressing reset button. Reinserting the card makes it appear. Please try it yourself, you should be able to reproduce it quite easily.


    Our efusA9X boards have eMMC onboard, so I could not test micro SD slot on starter kit.


    Can you please check this issue and give me some feedback?


    Best regards,


    Miodrag Bazdar

  • Hello,


    for sure we will check it.

    It is already in the queue!

    But i may take some days.

    F&S Elektronik Systeme GmbH
    As this is an international forum, please try to post in English.
    Da dies ein internationales Forum ist, bitten wir darum, Beiträge möglichst in Englisch zu verfassen.

  • Hello,


    you can download kernel 1.40 Beta, SD is working after soft reset now.

    Please test.

    F&S Elektronik Systeme GmbH
    As this is an international forum, please try to post in English.
    Da dies ein internationales Forum ist, bitten wir darum, Beiträge möglichst in Englisch zu verfassen.

  • Dear Support Team,


    I confirm SD card is working correctly after soft reset with kernel V1.40 Beta. Can you please send us BSP with this correction as well, so we can build image ourselves?


    Thanks in advance,


    Best regards,


    Miodrag Bazdar