How do I debug a Nios® II system without downloading the program again?

Description

To open a Nios II debug session without downloading code, perform the following steps:

1. Go to Run->Debug
2. Select the configuration you want to run
3. Select the Debugger tab
4. Choose one of the following under Download and Reset:
• Attach to existing program on target (no download)
• Reset target and execute from reset vector (no download)
5. Click the Debug button.

The first option in step 4 will attach to the current location being executed. The second option will attach and reset the program currently running on the target board.