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Altera_Forum
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11 years ago

Problem reading a big txt file using system console and loading it to a SDRAM

Hi forum, I'm trying to load a txt file containing 1350000 32 bits words to the SDRAM of a DE0 nano dev board but system console is freezing or crashing. I've tried to read the whole file and l...
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Altera_Forum
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11 years ago

I analyzed the JTAG-to-Avalon-ST/MM protocol

http://www.ovro.caltech.edu/~dwh/correlator/pdf/altera_jtag_to_avalon_analysis.pdf

and found that master_read/write_memory work significantly faster than master_read/write_32. If you are using an older version of Quartus, you can use master_read/write_memory to improve your performance.

If you are using the latest version of Quartus, look in the latest version of the handbook

http://www.altera.com/literature/hb/qts/qts_qii53028.pdf

master_write_from_file and master_read_to_file (see p38 of this PDF).

I suspect they will be optimized for file transfers too.

Cheers,

Dave