Memory sharing between M7 and M4 - STM32H745

Hello @Nsg1987, 

You can use the STM32H7 dual-core inter-processor communication feature IPC to define a shared memory region that can be accessible by both cores.

Please check AN5617 and this video 

Hope that helps!

Hello @Sarra.S 

Thanks for sharing. I downloaded the same code but found below errors.

../../Middlewares/Third_Party/OpenAMP/libmetal/lib/include/metal/compiler/mdk-arm/errno.h:19:2: error: #error "Include metal/errno.h instead of metal/mdk-arm/errno.h"
19 | #error "Include metal/errno.h instead of metal/mdk-arm/errno.h"
| ^~~~~
make: *** [Core/Src/subdir.mk:31: Core/Src/sysmem.o] Error 1
make: *** Waiting for unfinished jobs....
In file included from ../Core/Src/syscalls.c:26:
../../Middlewares/Third_Party/OpenAMP/libmetal/lib/include/metal/compiler/mdk-arm/errno.h:19:2: error: #error "Include metal/errno.h instead of metal/mdk-arm/errno.h"
19 | #error "Include metal/errno.h instead of metal/mdk-arm/errno.h"
| ^~~~~
make: *** [Core/Src/subdir.mk:31: Core/Src/syscalls.o] Error 1
"make -j20 all" terminated with exit code 2. Build might be incomplete.

could you please see and help me to resolve the above error.

Nikhil

OpenAMP... :beaming_face_with_smiling_eyes: C'mon, just create a volatile variable/structure at a specific address in a shared memory and it's done! Though on the M7 side you have to configure or maintain the D-cache also. And for a more complex scenarios take a look at this:

https://github.com/MaJerle/stm32h7-dual-core-inter-cpu-async-communication