How to move ISRs to ITCM RAM

[jakob.brunhart]

Hello,

I try to run an ISR (void TIM3_IRQHandler(void)) in the ITCM RAM area.

I'm new with scatter-files. Anybody has an example?

(NUCLEO-H743ZI, Keil uVision)

Regards

Jakob

[After Forever · Accepted solution]

Check out AN4296 at https://www.st.com/resource/en/application_note/dm00083249.pdf

[jakob.brunhart]

Thank you

[Tesla DeLorean]

One could call out the stm32h7xx_it.o (the object) in the scatter file and direct it into a RAM Region

Real problem is everything you might call, or library code.

[jakob.brunhart]

Thank you for your help. First test was succesful.

Regards

[SF??r]

With help of the AppNote I put the HAL lib and the FreeRTOS files (*.o) successful to the ITCM RAM region (gcc). But if I add the *_it.o file like in the example it will rise hardfault ISR after a while (interestingly successful). What could be the reason for this? Some interrupts seems to work without problem...