Honored Contributor
Honored ContributorI suggest you implement in the fpga configuration a simple monitor signal (e.g. a blinking led or a switching signal connected to a counter) on a spare fpga output.
If the signal starts just after CONF_DONE is active, then you are sure the fpga correctly configures with the updated image, thus the problem is only with Nios boot. In the latter case, I don't think you have a mismatch in the image. From my experience is more probable your build the updated image with a bad bootloader. Do you overwrite the factory programmed image or do you save the image at different epcs addresses? In the first case you can use the standard bootloader while if Nios code is not just after fpga configuration data, you need a special bootloader.
