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Processor always jumps to default exception handler

Good day,

My code for configuring the NVIC and peripheral interrupts are already working as expected, but the only problem now is the debugger shows that the processor always jumps to the default handler (__default_handler) and never on my defined interrupt handler whenever I trigger the interrupt source. 

I already added the specific interrupt vector in the vector table from the file vector_table_M.s and included it in my project. Am I missing something else?

Hardware: Tiva C Launchpad from TI

IDE: IAR Embedded Workbench

Thanks for any help,

William

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