How to use SDRAM instead of SRAM memory in STM32F429I-Eval board.

[ananya]

How to use SDRAM instead of SRAM memory in STM32F429I-Eval board as the touchgfx generated files need more memory , IAR 7.4 IDE is used. 

[Tesla DeLorean]

Add in the BSP files for SDRAM, initialize in SystemInit(), and change the memory mapping passed to the linker.​

[ananya]

Hello Clive,

Can you please elaborate on the changing the memory mapping passed to the linker..

[Martin KJELDSEN]

Hi @ananya​,

All you have to do is pass a pointer to TouchGFX HAL that points to somewhere in external memory. like 0xC0000000, and then pass that pointer to HAL, e.g.

hal.setFrameBufferStartAddress((uint16_t*)frameBuf0, 16);

[Martin KJELDSEN]

Whereas if you wanted to supply the address of a framebuffer in internal ram you would simply allocate that memory statically (array of e.g. uint16_t) and pass a reference to that.

/Martin