Oke I want it to extend the RAM just like FSMC does on the STM429i.. so in boot it has to expand.... and that the framebuffer can use it as if it already was there.. I will look into some examples where I can begin.... the 23LC1024 I will try first.
As Alan mentioned, the serial SRAM driver would be a welcome addition. However, you cannot use it to "To scale up the free memory." It does not support random access and cannot be used to increase the size of the heap you can allocate from.
The STMF429i uses parallel, random access FSMC SRAM, not serial memory. That is how it is able to extend the free memory. SPI SRAM will not cut it.
