Good morning,
I need to create a shared memory space between two applications (Bootloader and Application).
I am working with STM32F303RET6 MCU.
I want to do this inside flash memory and not SRAM.
For that reason I found many examples and codes where functions are created to Erase Memory and Write it again.
Everything works fine if I use addresses from 0x8000000 to 0x803FFFF, while errors occurs if I try to share memory addresses from 0x8040000 to 0x8080000.
Just to be sure the problem are not related to those functions, I tried to write my Application from a specific flash memory address modifying linker file (.ld). I tried writing the application from address 0x8040000 like in the example. When I download the code, it fails.
/* Memories definition */
MEMORY
{
CCMRAM (xrw) : ORIGIN = 0x10000000, LENGTH = 16K
RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 64K
FLASH (rx) : ORIGIN = 0x8040000, LENGTH = 80K
}
MCU STM32F303RET6 should have 512Kb of Flash, so I should be able to write into this range. Then I discovered some disaligning information between Datasheet and Reference Manual.
I also found this post in the community where is written that Datasheet has a typo mistake (and it is still present inside datasheet!)
ttps://community.st.com/s/question/0D53W00000wxBndSAE/memory-map-issues-of-stm32f303re
So, which is the correct flash memory size of STM32F303RET6 MCU?
Because, again, everywhere is written 512 Kb but I am not able to write flashing addresses between 0x8040000 and 0x8080000.
So it seems to be 256 Kb.
Thanks.
