Is it possible to use external SRAM as data memory without using MicroLib?

pipiluxixi1 · ‎2009-03-30

Posted on March 31, 2009 at 06:06

pipiluxixi1 · ‎2011-05-17

Posted on May 17, 2011 at 13:08

Hi,

I have a problem with Keil MDK and STM32E_EVAL board. I want to use external SRAM as data memory and internal SRAM for Stack. In MDK IDE->Project->Option, I checked Off-Chip RAM1(Start:0x68000000,Size:0x100000) and uncheked On-Chip IRAM1. According to stm32f10x_vector.s, set DATA_IN_ExtSRAM EQU 1. In order to make my application to run correctly, I must check use MicroLib in Project->Option. Only by this mean, the SP can be set in internal RAM.

But I don't want to use MicroLib.

Is it possible to use two seperate RAM described above without using MicroLib?

I want to let MDK Linker to locate variables automatically. That is to say, set options in IDE instead of locating variables manually.

Must I make some changes to stm32f10x_vector.s?

Can anyone give me some advice? Thanks a lot.

jilisegiar · ‎2011-05-17

Posted on May 17, 2011 at 13:08

in the provided stm32f10x_vect.s comment ''Stack_Mem SPACE Stack_Size'' and add the following line:

Stack_Mem EQU 0x20000000