External Memory Interfaces Intel® Agilex™ FPGA IP User Guide

ID 683216
Date 10/04/2021
Public

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11.8.3. Changing the Reset Trigger of the Default Traffic Generator

As generated, the design example project responds to an active-high reset pulse on the local_reset_req signal.

If you prefer to have a level-sensitive, typically active-low reset signal as was common with earlier device families, you can invert the design example reset signal by making the following RTL changes to the ed_synth.v file:

  • Add the following two lines in the wire declaration section:
    wire reset_invert;
    assign reset_invert = !local_reset_req;
    
  • Where the reset block is instantiated, change the local_reset_req to connect to the inverted reset signal called reset_invert, as follows:
    ed_synth_local_reset_combiner local_reset_combiner (
    .clk
    (emif_fm0_0_pll_ref_clk_out_clk),
    .reset_n
    (emif_fm0_0_pll_locked_pll_locked),
    .local_reset_req
    (local_reset_req),
    .local_reset_req
    (reset_invert),
    .local_reset_req_out_0
    (local_reset_combiner_local_reset_req_out_0_local_reset_req),
    .local_reset_done
    (local_reset_done),
    .local_reset_done_in_0
    (emif_fm0_0_local_reset_status_local_reset_done)
    );

In addition, it is a good idea — though not mandatory — to also run analysis and elaboration, to help show project structure and verify assignments.