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Altera_Forum's avatar
Altera_Forum
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16 years ago

initializing very long vectors

hi

i'm trying to create very long signals in vhdl, and initiate it with 101010101010

is there elegant way to initiate it ??

thanks...

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    A for .. generate construct in the declarative part of the architecture or an initialisation function with a for loop iteration.

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    you can also write literal values in hex (precede the literal with x):

    my_long_slv <= x"123FFFAA";

    another useful tip is you can put underscores in literals to separate groups of 4:

    my_slv <= "0001_0010_0011_1111_1111_1111_1010_1010";

    my_slv <= x"123F_FFAA";