Can I combine SRAM1 and SRAM2?

[Clonimus74]

Hi,

I use STM32L476QE.

I want to use the entire RAM (96KB SRAM1 and 32KB SRAM2) as one continuous memory, is that possible?

I use IAR

[Uwe Bonnes]

The memory is continous, so you can combine it. I do not know how IAR linker file work, but in principle remoce the SRAM2 definition and extend the SRAM1 upper limit to the SRAM2 upper limit.

[Clonimus74]

But they are not mapped continuously:

define symbol __ICFEDIT_region_RAM_start__  = 0x20000000;

define symbol __ICFEDIT_region_RAM_end__   = 0x20017FFF;

define symbol __ICFEDIT_region_SRAM2_start__ = 0x10000000;

define symbol __ICFEDIT_region_SRAM2_end__  = 0x10007FFF;

[Clonimus74]

No one has any ideas?

Currently I add variables to SRAM2 manually, which is very inconvenient.

using:

#pragma default_variable_attributes = @ "SRAM2_MEM"

[S.Ma]

For a memory segment there should be some #pragma to put the variables in the right sector.

Read the compiler and especially linker documentation.

Otherwise, put the stack in the 16kbyte region SRAM2 to get started with minimal C coding efforts.

[Clonimus74]

I don't think you read my post and comments.

I already use the pragma, and the SRMA2 is 32KB, too big for just stack.

I was looking for a way to combine them so I wouldn't have to do it manually.

[S.Ma]

What you ask is very specific and should be asked to the compiler toolchain support team or forum. So far I would say such linker mecanics maynot exist as rarely asked.