View Full Version : USB Transaction Timeout on Mac OS X 10.5.7

Jul 2, 2009, 01:43 AM
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.