USB Transaction Timeout on Mac OS X 10.5.7

Discussion in 'Mac Programming' started by TanushreeD, Jul 1, 2009.

  1. TanushreeD macrumors newbie

    Jul 1, 2009
    Hello All,

    I am newbie to MAC.
    I am writing a Device Firmware Updater for a Bluetooth Headset device on Mac OS X 10.5.7. while downloading the firmware I keep on getting "Transaction Timeout" errors very frequently.
    The application runs successfully for firmwares having size less than 700KB but it gives error "Transaction Timeout" for firmware having size 1.2MB.

    I am writing firmawre on device in block of 1023bytes.
    My program is writing some blocks and after sometime it halts giving error "Transaction Timeout"
    Everytime, number of blocks written successfully differs.

    I am using XCODE, Objective C & COCOA framwork for this.

    I am using funtion DeviceRequestTO() and structure IOUSBDevRequest for the purpose of writing firmware on device.

    Please, can anyone help me.....?

    Thanks in advance.

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