// ---------------------------------------------------------------------- // "THE BEER-WARE LICENSE" (Revision 42): // wrote this file. As long as you retain this // notice you can do whatever you want with this stuff. If we meet // some day, and you think this stuff is worth it, you can buy me a // beer in return Yasunori Osana at University of the Ryukyus, // Japan. // ---------------------------------------------------------------------- // OpenFC project: an open FPGA accelerated cluster toolkit // Kyokko project: an open Multi-vendor Aurora 64B/66B-compatible link // // Modules in this file: // gt_rst: reset control for most FPGAs' gigabit transceivers // ---------------------------------------------------------------------- `default_nettype none module gt_rst ( input wire CLK, RST, output wire GT_RST ); reg GT_RSTr = 1; reg [7:0] GT_RST_CNT = 0; always @ (posedge CLK) begin if (RST) GT_RST_CNT <= 0; else GT_RST_CNT <= GT_RST_CNT + ((~>_RST_CNT) ? 1 : 0); GT_RSTr <= (GT_RST_CNT==0) ? 1 : (GT_RST_CNT==200) ? 0 : GT_RSTr; end assign GT_RST = GT_RSTr; endmodule // gt_rst `default_nettype wire