Sorry about the email signature.
On Sun, Jan 31, 2021 at 1:18 PM Anthony Merlino <anth...@vergeaero.com> wrote: > Awesome Brennan, thanks for the info. That totally makes sense. > > I have updated the following pages to include this information: > > https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=139629543 > https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=139629542 > > Best, > Anthony > [image: photo] > *Anthony Merlino* > CTO & Co-founder, Verge Aero > (609)-319-1399 > > > > On Sun, Jan 31, 2021 at 12:29 PM Brennan Ashton <bash...@brennanashton.com> > wrote: > >> Looks like the inline images dropped try to attach them here. Otherwise >> you can find them in "System Architecture" section of the Reference Manual. >> >> On Sun, Jan 31, 2021, 9:25 AM Brennan Ashton <bash...@brennanashton.com> >> wrote: >> >>> Hey Anthony, >>> The best place is usually just a GitHub ticket or here. The issue with >>> CCM is that at least in some of the STM32F4 series it is directly attached >>> to the D bus so the CPU absolutely cannot execute from it. Also why you >>> cannot do things like DMA. This is not true for all CCM like the STM32F3. >>> See they system architecture diagrams here for the two. >>> >>> >>> >>> >>> >>> --Brennan >>> >>> On Sun, Jan 31, 2021, 9:15 AM Anthony Merlino <anth...@vergeaero.com> >>> wrote: >>> >>>> Hi all, >>>> >>>> I was just reading the documentation on Confluence regarding ELF >>>> programs: >>>> >>>> https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=139629543 >>>> >>>> Here is the relevant excerpt >>>> >>>> Most MCUs based on ARMv7-M family processors support some kind of >>>> Tightly >>>> > Coupled Memory (TCM). These TCMs have somewhat different properties >>>> for >>>> > specialized operations. The STM32 F4 supports similar Core Coupled >>>> Memory >>>> > (CCM). It is important to not that *you cannot execute programs from >>>> CCM!* >>>> > >>>> >>>> My question is - Is it just CCM that cannot be used when ELF loading is >>>> enabled? Or is it all TCM? Also, does anyone have the technical >>>> explanation >>>> for why CCM results in hard-fault? >>>> >>>> Is there a place to raise this type of "issue" for documentation on >>>> Confluence? >>>> >>>> Best, >>>> Anthony >>>> >>>
