switch from STM32f4 to stm32f7

[ASSAAD.ASSAAD]

Posted on October 06, 2015 at 15:13

Hello All

We have stm32f4 in a product running 168MHZ now switching to stm32f7 running At 168 MHz, the STM32F405/415 deliver 210 DMIPS/566 CoreMark performance executing from Flash memory, for stm32f7 ; At 216 MHz fCPU, the STM32F745 delivers 1082 CoreMark / 462 DMIPS performance executing from Flash I could not understand how much is the M7 is faster from M4 ; for example the same routine for both ; how much is it faster ? for a valid hardware and software ( M4)  ;  can we use  for M7 ? Thank you in advanced

[Nesrine M_O]

Posted on October 06, 2015 at 15:58

Hi,

I could not understand how much is the M7 is faster from M4; for example the same routine for both; how much is it faster? To reply to your question have a look to the 

http://www.st.com/st-web-ui/static/active/en/resource/technical/document/application_note/DM00169764.pdf?s_searchtype=keyword

 application note.For a valid hardware and software ( M4)  ;  can we use  for M7 ?  

http://www.st.com/web/en/resource/technical/document/application_note/DM00164538.pdf

 application note provides guidelines on hardware and software migration.-Syrine-

[Tesla DeLorean]

Posted on October 06, 2015 at 16:22

How long is a piece of string?

Don't know, measure it. All these things are dependent on the code and algorithm in question, and how it interacts with memory, etc. The only benchmark that matters is the one you make on your own code, under conditions that match the expected use cases.