commit 0d88beea50c79d7739e13bcbdad3ef9143669df6 Author: Pierre Pronchery Date: Sun Apr 30 05:01:47 2017 +0200 Initial import diff --git a/project.conf b/project.conf new file mode 100644 index 0000000..a132cb0 --- /dev/null +++ b/project.conf @@ -0,0 +1,5 @@ +package=libFPGA +version=0.0.0 + +subdirs=src +dist=Makefile diff --git a/src/counter.v b/src/counter.v new file mode 100644 index 0000000..5fa4929 --- /dev/null +++ b/src/counter.v @@ -0,0 +1,57 @@ +/* $Id$ */ +/* Copyright (c) 2017 Pierre Pronchery */ +/* This file is part of DeforaOS libFPGA */ +/* All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ + + + +`ifndef COUNTER_SIZE + `define COUNTER_SIZE 8 +`endif +`define COUNTER_SIZE_REG(width) (width - 1) + + +module counter ( + input wire clk, + input wire rst, + input wire en, + output reg [`COUNTER_SIZE_REG(`COUNTER_SIZE):0] cnt = `COUNTER_SIZE'b0 +); + + +always @(posedge clk) +begin + if(rst) + begin + cnt <= `COUNTER_SIZE'b0; + end + else if(en) + begin + cnt <= cnt + `COUNTER_SIZE'b1; + end +end + +endmodule diff --git a/src/project.conf b/src/project.conf new file mode 100644 index 0000000..f3259d6 --- /dev/null +++ b/src/project.conf @@ -0,0 +1,6 @@ +targets=counter.vvp +dist=Makefile + +[counter.vvp] +type=object +sources=counter.v