Which file format is suitable for Passive Parallel Programming of Cyclone 10?

[ddbug]

Which output file format do I need to create for Passive Parallel loading of Cyclone 10? No encryption, compression, device chaining etc. Just a sequence of bytes (octets) to send to he FPGA by (say) a microcontroller.

I tried a .rpd but it isn't working for some reason.

The FPGA drops nSTATUS in the middle of loading.

Does rpd file have some header to skip or the whole file should be sent as is, from the first to the last byte?

[ddbug · Accepted solution]

The answer: use RBF format. Just send all bytes as is, and add few dummy clock cycles after the last byte,

-- dd