Posted by SyUm75 on 2015-08-14 15:41

I tried to allocate my OS heap in SRAM2 that way:

Source C code:
static uint8_t attribute ((section (“RAM_2”))) ucHeap configTOTAL_HEAP_SIZE ;

Linker script: definiing the section:
RAM_2 (xrw) : ORIGIN = 0x10000000, LENGTH = 32K

But doing this is NOT working: gcc allocate a section RAM_2 in classic RAM section and ucHeap won’t reside in RAM_2 section defined in linker script.

Can you provide the right way to do this ?

thanks and regards,
Sylvain

Posted by SyUm75 on 2015-08-14 16:19

I solved my own issue using a previous post on the forum:

here is a solution:
linker script:

region definitions:

RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 96K
RAM_2 (xrw) : ORIGIN = 0x10000000, LENGTH = 32K

in section definitions:

.ram2_bss :
{
. = ALIGN(4);
*(.ram2_bss)
*(.ram2_bss*)

} >RAM_2

C source code:
static uint8_t attribute ((section (“.ram2_bss”), used)) ucHeap configTOTAL_HEAP_SIZE ;

regards,
Sylvain

Posted by sachingole on 2017-06-19 22:32

Hi ST support,

I’m using STM32L476RG-Nucleo, AC6 IDE generated linker script only offers 96 KB RAM.

My need application more RAM, can I use 32 KB which is SRAM2 as below.

32 Kbyte located at address 0x1000 0000 with hardware parity check (SRAM2)

Best regards,
Sachin