I'm new to microcontroller programming.

I have a "AT91SAM7X256" controller at the "SAM-EX256" Board and try to
access a SD-card. I found the example from Martin Thomas and follow it.
I modified the makefile, included the right header-files for my
controller and adapted the registers as far as I could.

I'm able to compile the main-file without any errors, but nothing
happens after this, there isn't any reaction one the board or the
SD-card. I measure for example the clock pin and there no reaction.

Then I try to debug it, but the debugger doesn't runs properly. There
are some files he cannot jumps into, for example.

Has anyboby an idea what's the mistake?

Please help me out.

Regards,
Thomas