From 9a8704ed46ff66276a207d30b04b8c40b9b87e52 Mon Sep 17 00:00:00 2001 From: Matt Ettus Date: Mon, 22 Nov 2010 11:39:47 -0800 Subject: packet valve. will drop incoming data if shut off. --- usrp2/fifo/valve36.v | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 usrp2/fifo/valve36.v (limited to 'usrp2/fifo') diff --git a/usrp2/fifo/valve36.v b/usrp2/fifo/valve36.v new file mode 100644 index 000000000..b4b23e5a6 --- /dev/null +++ b/usrp2/fifo/valve36.v @@ -0,0 +1,28 @@ + + +module valve36 + (input clk, input reset, input clear, + input shutoff, + input [35:0] data_i, input src_rdy_i, output dst_rdy_o, + output [35:0] data_o, output src_rdy_o, input dst_rdy_i); + + reg shutoff_int, active; + + assign data_o = data_i; + + assign dst_rdy_o = shutoff_int ? 1'b1 : dst_rdy_i; + assign src_rdy_o = shutoff_int ? 1'b0 : src_rdy_i; + + always @(posedge clk) + if(reset | clear) + active <= 0; + else if(src_rdy_i & dst_rdy_o) + active <= ~data_i[33]; + + always @(posedge clk) + if(reset | clear) + shutoff_int <= 0; + else if(~active) + shutoff_int <= shutoff; + +endmodule // valve36 -- cgit v1.2.3