CPU 210MHzIf you run IRQ code from flash you have about 5 times more cpu cycles as needed (7WS)if you switch on ART accelerater and prefetch: for loop gets slower no influence on IRQ latencyyou could not run code from internal SRAM because of missing remap STM32F4xxx can remap to SRAM at 0x00there is no option to speed up IRQ times with this F7 family :thumbs_down:

Associate III

Question

How to speed up IRQ times at STM32F7xxx ?

CPU 210MHz
If you run IRQ code from flash you have about 5 times more cpu cycles as needed (7WS)
if you switch on ART accelerater and prefetch:

for loop gets slower

no influence on IRQ latency

STM32F4xxx can remap to SRAM at 0x00

there is no option to speed up IRQ times with this F7 family :thumbs_down:

This topic has been closed for replies.

Guru

>>you could not run code from internal SRAM because of missing remap

You can still run from Internal SRAMs.

Use ITCMRAM at 0x00000000, or DTCMRAM at 0x20000000

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Associate III

I can run code from internal SRAM too but I need IRQs and working vectortable, thats the problem !

Guru

And why wouldn't a vector table and code placed in ITCMRAM achieve this?

Both ITCM and DTCM RAM should permit instruction fetch.

I'd use ITCMRAM that's what it is explicitly designed and placed to achieve.

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