Forum: ARM programming with GCC/GNU tools USB-CDC code not working in KEIL

von Nanju M. (nanjooh)

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Hi friends,

I am working in the KEIL uvision3 (Real view) tool.
Right now i am working in the USB-CDC programming for the AT91SAM7SE512

I have a example source code for AT91SAM7S64 processor in IAR workbench
Downloaded from
.This IAR code is working very well.
I want to  covert  the code from IAR  to keil tool for AT91SAM7SE512

The Problem is

1. when i connect the device to the host ( PC ),  I am getting the
message "USB device is not recognized".

2. can I include any files to this?

I have included the source code for your reference.

Could you please  advice me on this.

With Regards & Thanks,

von Martin T. (mthomas) (Moderator)

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This might be a problem with struct-packaging. Did you check this? AFAIK
the Realview-compiler has a pragma to enable/disable packaging. There
are also USB examples included in the Keil-package (at least in an older
eval-version I have here) where you can see how the packaging can be

von Kris R. (2gatunek)

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Do you resolve your problem ?


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