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BrianHG's avatar
BrianHG
Icon for Occasional Contributor rankOccasional Contributor
5 years ago
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How do I make modelsim fwrite/dump an 8 bit array literally in binary.

I'm having trouble finding the right way to dump a memory array from my System Verilog testbench into a file. This is as close as I can get, but, it has 2 problems. Anytime I try to write characte...
  • BrianHG's avatar
    BrianHG
    5 years ago

    Hello SyafieqS, thank you for your reply, but, your link does not cover any binary writing of data. It is ok as I fround out how and finally got my testbench SystemVerilog .bmp picture saver working.

    Source example located here: https://www.eevblog.com/forum/fpga/systemverilog-example-testbench-which-saves-a-bmp-picture-and-executes-a-script/msg3448860/#msg3448860

    Instruction are located in the first post in that thread.

    The relevant code is in the source file 'ellipse_generator_tb.sv' line 203, opening the file for write as a 'wb' for write binary. And when $fwrite data, the two possible in quotes methods are "%c" for a single character, or "%u" for writing a 32bit word located on lines 215, 218 & 225.

  • BrianHG's avatar
    BrianHG
    Icon for Occasional Contributor rankOccasional Contributor
    5 years ago

    Hello SyafieqS, thank you for your reply, but, your link does not cover any binary writing of data. It is ok as I fround out how and finally got my testbench SystemVerilog .bmp picture saver working.

    Source example located here: https://www.eevblog.com/forum/fpga/systemverilog-example-testbench-which-saves-a-bmp-picture-and-executes-a-script/msg3448860/#msg3448860

    Instruction are located in the first post in that thread.

    The relevant code is in the source file 'ellipse_generator_tb.sv' line 203, opening the file for write as a 'wb' for write binary. And when $fwrite data, the two possible in quotes methods are "%c" for a single character, or "%u" for writing a 32bit word located on lines 215, 218 & 225.