Honored Contributor
Honored ContributorLerxt,
Your first error was received because the NIOS IDE attempted to download your application code to the memory that you specified as your program memory in the system library settings. However, after it tried to download, it attempted to verify that the memory was programmed correctly and failed. This probably occurred because your DDR2 interface is not operating correctly. Could you please post a screenshot of your SOPC builder system? Your second error usually occurs for one of two reasons: 1 - Your clock or reset connection to your processor is stuck. 2 - Your clock or reset connection to your DDR2 interface is stuck. This one is less obvious. I assume you are using a clock crossing bridge between your NIOS processor and the DDR2 memory. If the DDR2 interface clock is stuck, the FIFO within the clock crossing bridge never gets emptied which results in a waitrequest signal being permanently asserted to the NIOS' Avalon master. Then the system hangs. The fix for the second error is to just make sure everything is connected properly, your clocks are running as they should be, and your reset signals aren't stuck active. Jake
