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Altera_Forum
Honored Contributor
Honored ContributorDE2-115 and SRAM using SOPC (Qsys)
Hello Everyone,
I need help pleeeeeeeeeeeeeese. I am trying to initlize the SRAM on the DE2 board using a C program, and I thought I will do this using SOPC. I've been told that the name of the SRAM interface on Qsys or SOPC is "Avalon-MM Tristate Bridge" but I have an error when I add it to my simple SOPC system; it says: "Error: tri_state_bridge_0.tristate_master must be connected to An Avalon-MM Tri state slave" The question is: 1) Where do I connect this "tri_state_bridge.tristate_master"? or 2) Does anyone know how to access the SRAM using SOPC or Qsys? Please help11 Replies
Altera_ForumYou need both the component you mentioned: tristate bridge and tristate slave.
Tristate Bridge slave port has to be connected to an Avalon bus master (usually this is the same which is connected to Nios data and/or instruction port). The other bridge port connects to the tristate slave device. In your case you should have a specific component for your sram. Browse the Qsys/sopc components for the one matching your sram. If you don't have it you can use the component wizard to design one. Actually, this is usually a simple *.tcl file defining your sram timing and pin connections.
