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zcash-fpga
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add code for random backpressure

This commit is contained in:
bsdevlin 2019-04-07 14:18:05 -04:00
parent 6dc098c0e9
commit d35d61f89b
1 changed files with 5 additions and 3 deletions
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8
ip_cores/common/src/rtl/common_if.sv
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@ -126,12 +126,12 @@ interface if_axi_stream # (
endtask;
// Task used in simulation to get data from a sink interface
task automatic get_stream(ref logic [common_pkg::MAX_SIM_BYTS*8-1:0] data, ref integer signed len, input integer bp = 0);
task automatic get_stream(ref logic [common_pkg::MAX_SIM_BYTS*8-1:0] data, ref integer signed len, input integer unsigned bp = 50);
logic sop_l = 0;
rdy = ($random % 100) >= bp;
len = 0;
data = 0;
@(posedge i_clk);
@(negedge i_clk);
while (1) begin
if (val && rdy) begin
@ -144,9 +144,11 @@ interface if_axi_stream # (
len = len + (eop ? (mod == 0 ? DAT_BYTS : mod) : DAT_BYTS);
if (eop) break;
end
@(posedge i_clk);
@(negedge i_clk);
rdy = ($random % 100) >= bp;
end
@(posedge i_clk);
rdy = 1;
endtask