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We create a very simple pcore with a DDS with Sysgen chipscope block. After generating the bitstream in EDK, we got two files, one is download.bit and the other is system.bit.
1) It seems to us that both bit files are the same, so we should download either one. Right?
2) Should we use EDK to download the bitstream or use the Chipscope?
3) We have tried both way in question (2). In either way, however, we couldn't find .cdc file for importing into chipscope. How do use chipscope with compiled bitsteam from EDK?
Thank you very much.
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1) system.bit contains just the hardware platform. download.bit is produced after compiling your source code; it is system.bit with the initial values of the FPGA's block RAMs set to contain your code and data.
2) Doesn't matter; either works. If you download with EDK, you should open ChipScope after downloading. Otherwise ChipScope Analyzer won't see any cores in the un-configured FPGA.
3) If you used sysgen2opb, the CDC file is produced during netlisting. Look in the Sysgen netlist directory for the file <your_design>.cdc. If you use the latest sysgen2opb and OPB Export Tool (get them from the web site), the cdc file will be copied into the pcore's mdlsrc folder along with the source Sysgen models.
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