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Problems when using printf

Hi !

My program crashes when using printf(). I use MDK ARM V3.0 together with KEIL-Debugger an ARM STR7-Controller.
When program runs in debugger -> no problem.
When disable interrupts -> no problem
When I change the file scat.scf to start the program from address 0x40000000 -> no problem

But I want to use the IAP-Driver in sector 0 and so my program should be able to start at 0x40002000. Is there something wrong with interrupt vectors ?

My program is based on the KEIL-IAP example.

Has anyone on idea?

best regards

Marc

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