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Altera_Forum's avatar
Altera_Forum
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13 years ago

Compressed Bit Stream (EP3C40F484C7)

I have been trying to program a Cyclone III (EP3C40F484C7) in Passive Serial mode, driven by a CPLD, using the RBF file. When I program the part with a compressed RBF file(1,289KB), the part programs as expected. This RBF file is created by selecting "generate compressed bitstream" in the configuration settings in Quartus. However if I program the part with an uncompressed RBF file(3,488KB) I never receive a done back from the part and it does not program.

Has anyone else encountered this issue?

What might be a reason for the bitstream requiring compression?

Thank you.

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    13 years ago

    actually you only need the compression if your program memory (flash EPCS group) is less than your program created.

    Simply adjusting the compression of.
  • Altera_Forum's avatar
    Altera_Forum
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    13 years ago

    Thanks, but I am not programming a flash, I am programing the FPGA directly with the RBF file.

  • Altera_Forum's avatar
    Altera_Forum
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    12 years ago

    Hi, cprillo

    Did you fix the problem of umcompressed RBF file? I have come to this problem too, on stratix II fpga.