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Altera_Forum
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13 years ago

uncontrolled SDRAM content change

Hi, I use a code which checks external SDRAM () by writing 0xAAAA and 0x5555 patterns. But the code always return an error code! When I check step by step SDRAM content with NIOSII IDE I can ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Have you tried the memtest or the mini_memtest software examples that come on the ACDS? Those are coded to look for specific problems like stuck/shorted/open data or address bits. Being able to run code out of a memory doesn't necessarily mean it's working, there are all kinds of corner cases that can go unnoticed so I would test that memory with code *and* a DMA to make sure is it behaving properly.