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STM32F407 Channel Transmit error problem

Question asked by chandu on Jul 31, 2014
I'm using the STM USB Library version 1.1.0, working on coocox IDE. Here my problem is in the enumeration state i'm trying to get device descriptor for the MSC class device, at the time when i'm writing the setup packet into the FIFO, automatically channel state changed to disable and packet transfer error is occured, but channel interrupt is raising.
I don't understand why it is happening like this, can any one please explain about this, please share your coocox working code for me.

Thanks & regards,