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Altera_Forum's avatar
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

I tried with read and write pointer access but it changes nothing:

During the sequential write loop, each cell is correctly written, but some steps after the same cell is written again (why???) with a random dummy val!

here the original simple code:

for (offset = 0; offset < nWords; offset++) {

IOWR(baseAddress, offset, pattern1);

}