Description
The RapidIO MegaCore function device support for Cyclone IV
GX devices includes only the EP4CGX50, EP4CGX75, EP4CGX110, and
EP4CGX150 devices. This restriction is not explained in the
RapidIO MegaCore Function User Guide. In addition, the RapidIO
parameter editor does not enforce this restriction: if you specify another
Cyclone IV GX device or allow the Quartus II software to automatically determine
the device, RapidIO MegaCore function generation proceeds with no warning,
but compilation fails.
This issue affects all RapidIO variations that target a Cyclone
IV GX device, if the specific device automatically determined by
the Quartus II software, or is an EP4CGX15, EP4CGX22, or EP4CGX30
device.
These RapidIO variations do not compile successfully.
Resolution
To avoid this issue, target your Cyclone IV GX RapidIO MegaCore
function to an EP4CGX50, EP4CGX75, EP4CGX110, or EP4CGX150 device.
This restriction is clarified in version 10.1 of the
RapidIO MegaCore Function User Guide. However, the RapidIO
parameter editor does not warn you about this issue.