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Altera_Forum's avatar
Altera_Forum
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17 years ago

about verify failed in sdram

hi,when i debug my program in niosII, i select the option Download program to Ram in Debugger page, but it always tips in the Console "Verifying 01000020 ( 0%) Verify failed between address 0x1...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

It means your SDRAM interface isn't working for some reason (probably timing). I don't know what chip you are using but my approach is usually to create a piece of onchip memory in your SOPC system and run the NIOS out of the onchip memory. Then write a tiny piece of test code that exercises your SDRAM interface. You can also use the mem_test example application.

Jake