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Altera_Forum
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12 years ago

.rbf / .jic file problem when changing from Cyclone IV to Cyclone V

Hi, We changed our design from a Cyclone IV (configured via an EPCS64) to a design with a Cyclone V (also configured via an EPCS64). The main parts of the rest of design remained the same. Wi...
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Altera_Forum
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11 years ago

I encountered the same problem on our new design and found the same problem. I've used the .rbf file in the past to configure an EPCS128 and everything was fine. Switching to Cyclone V I found the same issue as above.

The resolution to this is to generate the .rpd file instead. It is also a raw binary file. What I found is that .rbf is for parallel configuration modes and .rpd is for serial configuration modes. The files have slightly different options for the FPGA since the configuration modes are different. Certain options are available in parallel configuration modes and vice versa. This accounts for the nibble differences that was seen.

Hope that helped

/Boris