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ARM7: PROBLEM RELATED TO USB HOST

chandrakant PAL


hi,
Actually i m using lpc2468 controller.i m trying to write data in pen drive using USB through lpc2468.but the problem thet i m facing is that,when i format my pendrive using FAT16 through PC and try to write the data in pendrive through LPC 2468,the controller is not able to write the data.
but if after formatting my pendrive if i create a .txt file in pendrive and delete it immediately and then when i connect the pendrive to controller, the controller is able to write the data.
What can be the problem????
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  • 0

    Maybe the controller isn't reading the boot sector information and is only supporting FAT12?

    It has been a good rule for a good many years to format memory cards in the MP3 players, cameras etc that are intended to use them, just to solve these kinds of problems.

    Why?

    If there is something wrong in the file system code, the developers have most certainly tested their product on it's own - and have verified that memory formatted in the device can be read in a PC.

    But the developers have not been able to test all combinations where the memory card has been formatted by a PC, Mac, Linux, ... and then used in a device.

    You may of course contact Keil support and complain.

    By the way - exactly why did you think it was a good idea to write your text in bold? Cooler? Easier to read? Bigger chance to get an answer? Sorry, but wrong on all accounts. Harder to read, and people hates it so they are likely to ignore you.

  • 0 in reply to edPer Westermark

    its LPC2468
    the controller is reading the boot sector and it supports FAT16. i m able to write in pendrive through controller after creating a .txt file in it through PC but cant write when i format the pendrive through PC and directly connect it to the controller

  • 0 in reply to chandrakant PAL

    what did you do to debug this?
    tell everything you did and did not do.
    do you really believe complaining "it does not work" and stating the obvious can help us help you?