Interrupt Vector Table

[Alex_reynold]

Hello,
As per CM4 guide and TRM of Nucleo f446re,interruot vector table is array of function pointers and each pointer holds the entry address(initial address) of each IRQ_handler, Where interrupt IRQ_number is used for indexing.

While debugging I failed to observe the intial address of teh reset handler and USART2_Handler at location 0x0000 0004 and 0x0000 00DC respectively.Please find the samething in attachments.Address fo the IRQ_handlers are available in expressions window snapshot and actuall value stored at location 0x0000 0004 and 0x0000 00DC is not matching.
Am I missing something here?
I am just verifying my understanding -->"At each location in IVTable,address oif IRQ handlers should be ther (&<IRQ_Handler_Name>

"

[Alex_reynold]

Hi,

I got it.as youa re asking to use same function names declared in startup file.I tried it si working .But  I am looking for soltion where I have define some function funcHandler() and It need to attach this on interruptVectorTable.for example at 0x000000DC(Loc at IVT) i,e, &funcHandler needs to be placed at 0x000000DC.
How to Achive this.
I tried to use pointer also.
uint32_t *p;

p=(uint32_t *)(0x000000DC);

*p=(uint32_t)&funcHandler;

while debugging,value didnt change

[KnarfB]

this area is flash memory and you cannot write to it like writing to RAM. You may however relocate the entire vector table to SRAM using SCB->VTOR.

[Alex_reynold]

Thanks knarfb, I git the answer.thanks for the support an precise answer.

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