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Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

how to change the class file for the sram

I wanna use a sram named is61lv25616 in nios system!

so I change the parameters in up3 sram!

the parameters in up3 sram is:

WIZARD_SCRIPT_ARGUMENTS

{

sram_memory_size = "128";

sram_memory_units = "1024";

sram_data_width = "16";

}

SLAVE s1

{

PORT_WIRING

{

PORT data

{

width = "16";

is_shared = "1";

direction = "inout";

type = "data";

}

PORT address

{

width = "16";

is_shared = "1";

direction = "input";

type = "address";

the result I changed is:

WIZARD_SCRIPT_ARGUMENTS

{

sram_memory_size = "512";

sram_memory_units = "2048";

sram_data_width = "16";

}

SLAVE s1

{

PORT_WIRING

{

PORT data

{

width = "16";

is_shared = "1";

direction = "inout";

type = "data";

}

PORT address

{

width = "18";

is_shared = "1";

direction = "input";

type = "address";

}

but after I gererate the system ,the the address in symbol is from 19 to 0, but I think 18 to 0 is right!

who can help me?????

1 Reply

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

    Hi sybase2008,

    That's not a good idea to modify the sram component of up3. You can make that sram component under SOPC component editor, very easy.

    Up3 board has some special feature: besides databus. Its address bus is shared by sram, sdram, flash, etc. A multiplexer is needed in the top design. Up3 board may be different from your board, so just get ride of sram_up3.

    Cheers,