From bb0572a960edf54486a4be746c681adaac0fa398 Mon Sep 17 00:00:00 2001 From: Josh Blum Date: Tue, 23 Nov 2010 13:36:42 -0800 Subject: fpga: performed a forceful checkout of fpga to overwrite with current fpga code --- fpga/usrp2/top/u2plus/capture_ddrlvds.v | 39 +++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 fpga/usrp2/top/u2plus/capture_ddrlvds.v (limited to 'fpga/usrp2/top/u2plus/capture_ddrlvds.v') diff --git a/fpga/usrp2/top/u2plus/capture_ddrlvds.v b/fpga/usrp2/top/u2plus/capture_ddrlvds.v new file mode 100644 index 000000000..b9f53ff8c --- /dev/null +++ b/fpga/usrp2/top/u2plus/capture_ddrlvds.v @@ -0,0 +1,39 @@ + + +module capture_ddrlvds + #(parameter WIDTH=7) + (input clk, + input ssclk_p, + input ssclk_n, + input [WIDTH-1:0] in_p, + input [WIDTH-1:0] in_n, + output reg [(2*WIDTH)-1:0] out); + + wire [WIDTH-1:0] ddr_dat; + wire ssclk_regional; + wire ssclk_io; + wire ssclk; + wire [(2*WIDTH)-1:0] out_pre1; + reg [(2*WIDTH)-1:0] out_pre2; + + IBUFGDS #(.IOSTANDARD("LVDS_25"),.DIFF_TERM("TRUE")) clkbuf (.O(ssclk), .I(ssclk_p), .IB(ssclk_n)); + + genvar i; + generate + for(i = 0; i < WIDTH; i = i + 1) + begin : gen_lvds_pins + IBUFDS #(.IOSTANDARD("LVDS_25"),.DIFF_TERM("TRUE")) ibufds + (.O(ddr_dat[i]), .I(in_p[i]), .IB(in_n[i]) ); + IDDR2 #(.DDR_ALIGNMENT("C1")) iddr2 + (.Q0(out_pre1[2*i]), .Q1(out_pre1[(2*i)+1]), .C0(ssclk), .C1(~ssclk), + .CE(1'b1), .D(ddr_dat[i]), .R(1'b0), .S(1'b0)); + end + endgenerate + + always @(negedge clk) + out_pre2 <= out_pre1; + + always @(posedge clk) + out <= out_pre2; + +endmodule // capture_ddrlvds -- cgit v1.2.3