How to enable external RAM using SDRAM on STM32F429?

AKowa.2 · ‎2022-01-20

Hi,

I'm new to STM microcontrollers.

I was wondering if you could help me with running external ram IS42S16400 on STM32F429 using SDRAM interface.

I'm attaching my project.

Thanks a lot for your help :)

Tesla DeLorean · ‎2022-01-20

Perhaps look at the demo/example codes available for the STM32F429-DISCO, looking at the bus timings (clock cycles), and pins, vs the datasheets for the SDRAMs you've designed with.

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AKowa.2 · ‎2022-01-21

Hi,

@Community member thanks for your answer.

I modified my code using STM32F429-DISCO example, and unfortunately it still doesn't work :(

I hope that someone more experienced than me could help me.

I also attach modified project.

mƎALLEm · ‎2022-01-21

Dear @AKowa.2 ,

As said by @Community member STM32F429-DISCO has the same SDRAM part number as yours.

So the first thing to do is to check the clocks: try to have system clock configuration / prescalers / FMC timings for the memory same as the example available in CubeF4 under the path Projects\STM32F429I-Discovery\Examples\FMC\FMC_SDRAM.

Try also to check GPIOs config in relation with the SDRAM.

SofLit

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