Linker Script for external SDRAM

[N ORhan]

Hello everyone. Can anynone please explain the steps to configure linker script to use external SDRAM? I'm using Atollic True Studio as IDE and STM32F746GDISCO as evaluation board.

Thank you.

[Tesla DeLorean]

Take a look at this example, likely others in the repository

STM32Cube_FW_F7_V1.12.0\Projects\STM32746G-Discovery\Examples\FMC\FMC_SDRAM_DataMemory\SW4STM32\STM32746G_DISCOVERY\STM32F746NGHx_FLASH.ld

The linker script just describes memory regions, code in your startup file would need to bring the memory up, and copy over the statics, etc.

[N ORhan]

Thanks for your reply but what should i do step by step to have external SDRAM work properly. For example, Atollic TrueStudio can not read the values of variables stored in the address higher than 0xC0000000 which i defined as SDRAM region in the linker script.

It says "Failed to execute MI command:

-data-evaluate-expression RGB565_480x272

Error message from debugger back end:

Cannot access memory at address 0xc0000000".

What configurations should i do to make my defined address range in linker script accessible?

[N ORhan]

I'm not using any HAL driver or library so i want to understand the whole concept to make my project work properly.

Thanks again Clive for your reply.