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SDRAM cache and benchmarking on K65

Question asked by Peter Ruesch on Aug 11, 2015
Latest reply on Sep 25, 2015 by Peter Ruesch

Hi,

 

Marek Neuzil was kind enough to provide a working SDRAM example for Processor Expert. He posted it here: Re: can't read data back from SDRAM.

 

I modified it slightly to get some time measurement into it for better benchmarking of the SDRAM performance.

 

Unfortunetly, the numbers I get are worse than expected.

I'm getting arround 57 MB/s of memset performance.

I would expect something that is derived from a theoretical value of 240 MB/s (60 MHz bus clock x 32 Bit Buswidth)

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