Cyclone V: switching between application images using altremote_update

Hi all,

in case someone is experiencing the same problem: I found a solution that works for me:

In contrast to what Altera advices in the Cyclone 5 Handbook, I now do not set the AnF (Application / Not Factory) bit to 1 when I reconfigure to an application image. This allows the application images to write the Remote System Upgrade control registers, so the application images can directly switch to another application image, without going via the factory image (this is also different from the Cyclone V Handbook, Figure 7-22). In the case that an application image becomes corrupted, the remote_update circuitry reconfigures to address 0x0, which is the factory image. So this is the behavior I was looking for.