/*===========================================================================*/
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/*===========================================================================*/
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/* Copyright (C) 2001 Authors */
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/* Copyright (C) 2001 Authors */
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/* */
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/* */
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/* This source file may be used and distributed without restriction provided */
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/* This source file may be used and distributed without restriction provided */
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/* that this copyright statement is not removed from the file and that any */
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/* that this copyright statement is not removed from the file and that any */
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/* derivative work contains the original copyright notice and the associated */
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/* derivative work contains the original copyright notice and the associated */
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/* disclaimer. */
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/* disclaimer. */
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/* */
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/* */
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/* This source file is free software; you can redistribute it and/or modify */
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/* This source file is free software; you can redistribute it and/or modify */
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/* it under the terms of the GNU Lesser General Public License as published */
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/* it under the terms of the GNU Lesser General Public License as published */
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/* by the Free Software Foundation; either version 2.1 of the License, or */
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/* by the Free Software Foundation; either version 2.1 of the License, or */
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/* (at your option) any later version. */
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/* (at your option) any later version. */
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/* */
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/* */
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/* This source is distributed in the hope that it will be useful, but WITHOUT*/
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/* This source is distributed in the hope that it will be useful, but WITHOUT*/
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/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
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/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
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/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */
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/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */
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/* License for more details. */
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/* License for more details. */
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/* */
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/* */
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/* You should have received a copy of the GNU Lesser General Public License */
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/* You should have received a copy of the GNU Lesser General Public License */
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/* along with this source; if not, write to the Free Software Foundation, */
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/* along with this source; if not, write to the Free Software Foundation, */
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/* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
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/* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
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/* */
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/* */
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/*===========================================================================*/
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/*===========================================================================*/
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/* CLOCK MODULE */
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/* CLOCK MODULE */
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/*---------------------------------------------------------------------------*/
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/*---------------------------------------------------------------------------*/
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/* Test the clock module: */
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/* Test the clock module: */
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/* - Check the ACLK and SMCLK clock generation. */
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/* - Check the ACLK and SMCLK clock generation. */
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/* */
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/* Author(s): */
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/* - Olivier Girard, olgirard@gmail.com */
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/* */
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/*---------------------------------------------------------------------------*/
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/* $Rev: 17 $ */
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/* $LastChangedBy: olivier.girard $ */
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/* $LastChangedDate: 2009-08-04 23:15:39 +0200 (Tue, 04 Aug 2009) $ */
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/*===========================================================================*/
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/*===========================================================================*/
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`define LONG_TIMEOUT
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`define LONG_TIMEOUT
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integer mclk_counter;
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integer mclk_counter;
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always @ (negedge mclk)
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always @ (negedge mclk)
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mclk_counter <= mclk_counter+1;
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mclk_counter <= mclk_counter+1;
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integer aclk_counter;
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integer aclk_counter;
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always @ (negedge mclk)
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always @ (negedge mclk)
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if (aclk_en) aclk_counter <= aclk_counter+1;
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if (aclk_en) aclk_counter <= aclk_counter+1;
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integer smclk_counter;
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integer smclk_counter;
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always @ (negedge mclk)
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always @ (negedge mclk)
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if (smclk_en) smclk_counter <= smclk_counter+1;
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if (smclk_en) smclk_counter <= smclk_counter+1;
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initial
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initial
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begin
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begin
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$display(" ===============================================");
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$display(" ===============================================");
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$display("| START SIMULATION |");
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$display("| START SIMULATION |");
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$display(" ===============================================");
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$display(" ===============================================");
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repeat(5) @(posedge mclk);
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repeat(5) @(posedge mclk);
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stimulus_done = 0;
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stimulus_done = 0;
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// ACLK GENERATION
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// ACLK GENERATION
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//--------------------------------------------------------
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//--------------------------------------------------------
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// ------- Divider /1 ----------
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// ------- Divider /1 ----------
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@(r15 === 16'h0001);
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@(r15 === 16'h0001);
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@(negedge aclk_en);
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@(negedge aclk_en);
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mclk_counter = 0;
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mclk_counter = 0;
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aclk_counter = 0;
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aclk_counter = 0;
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repeat(735) @(posedge mclk);
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repeat(735) @(posedge mclk);
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if (mclk_counter !== 735) tb_error("====== CLOCK GENERATOR: ACLK (DIV /1) =====");
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if (mclk_counter !== 735) tb_error("====== CLOCK GENERATOR: ACLK (DIV /1) =====");
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if (aclk_counter !== 24) tb_error("====== CLOCK GENERATOR: ACLK (DIV /1) =====");
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if (aclk_counter !== 24) tb_error("====== CLOCK GENERATOR: ACLK (DIV /1) =====");
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// ------- Divider /2 ----------
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// ------- Divider /2 ----------
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@(r15 === 16'h0002);
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@(r15 === 16'h0002);
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@(negedge aclk_en);
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@(negedge aclk_en);
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mclk_counter = 0;
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mclk_counter = 0;
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aclk_counter = 0;
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aclk_counter = 0;
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repeat(735) @(posedge mclk);
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repeat(735) @(posedge mclk);
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if (mclk_counter !== 735) tb_error("====== CLOCK GENERATOR: ACLK (DIV /2) =====");
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if (mclk_counter !== 735) tb_error("====== CLOCK GENERATOR: ACLK (DIV /2) =====");
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if (aclk_counter !== 12) tb_error("====== CLOCK GENERATOR: ACLK (DIV /2) =====");
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if (aclk_counter !== 12) tb_error("====== CLOCK GENERATOR: ACLK (DIV /2) =====");
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// ------- Divider /4 ----------
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// ------- Divider /4 ----------
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@(r15 === 16'h0003);
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@(r15 === 16'h0003);
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@(negedge aclk_en);
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@(negedge aclk_en);
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mclk_counter = 0;
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mclk_counter = 0;
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aclk_counter = 0;
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aclk_counter = 0;
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repeat(735) @(posedge mclk);
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repeat(735) @(posedge mclk);
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if (mclk_counter !== 735) tb_error("====== CLOCK GENERATOR: ACLK (DIV /4) =====");
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if (mclk_counter !== 735) tb_error("====== CLOCK GENERATOR: ACLK (DIV /4) =====");
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if (aclk_counter !== 6) tb_error("====== CLOCK GENERATOR: ACLK (DIV /4) =====");
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if (aclk_counter !== 6) tb_error("====== CLOCK GENERATOR: ACLK (DIV /4) =====");
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// ------- Divider /8 ----------
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// ------- Divider /8 ----------
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@(r15 === 16'h0004);
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@(r15 === 16'h0004);
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@(negedge aclk_en);
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@(negedge aclk_en);
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mclk_counter = 0;
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mclk_counter = 0;
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aclk_counter = 0;
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aclk_counter = 0;
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repeat(735) @(posedge mclk);
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repeat(735) @(posedge mclk);
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if (mclk_counter !== 735) tb_error("====== CLOCK GENERATOR: ACLK (DIV /8) =====");
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if (mclk_counter !== 735) tb_error("====== CLOCK GENERATOR: ACLK (DIV /8) =====");
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if (aclk_counter !== 3) tb_error("====== CLOCK GENERATOR: ACLK (DIV /8) =====");
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if (aclk_counter !== 3) tb_error("====== CLOCK GENERATOR: ACLK (DIV /8) =====");
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// SMCLK GENERATION - LFXT_CLK INPUT
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// SMCLK GENERATION - LFXT_CLK INPUT
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//--------------------------------------------------------
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//--------------------------------------------------------
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// ------- Divider /1 ----------
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// ------- Divider /1 ----------
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@(r15 === 16'h1001);
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@(r15 === 16'h1001);
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@(negedge smclk_en);
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@(negedge smclk_en);
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mclk_counter = 0;
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mclk_counter = 0;
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smclk_counter = 0;
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smclk_counter = 0;
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repeat(735) @(posedge mclk);
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repeat(735) @(posedge mclk);
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if (mclk_counter !== 735) tb_error("====== CLOCK GENERATOR: SMCLK - LFXT_CLK INPUT (DIV /1) =====");
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if (mclk_counter !== 735) tb_error("====== CLOCK GENERATOR: SMCLK - LFXT_CLK INPUT (DIV /1) =====");
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if (smclk_counter !== 24) tb_error("====== CLOCK GENERATOR: SMCLK - LFXT_CLK INPUT (DIV /1) =====");
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if (smclk_counter !== 24) tb_error("====== CLOCK GENERATOR: SMCLK - LFXT_CLK INPUT (DIV /1) =====");
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// ------- Divider /2 ----------
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// ------- Divider /2 ----------
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@(r15 === 16'h1002);
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@(r15 === 16'h1002);
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@(negedge smclk_en);
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@(negedge smclk_en);
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mclk_counter = 0;
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mclk_counter = 0;
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smclk_counter = 0;
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smclk_counter = 0;
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repeat(735) @(posedge mclk);
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repeat(735) @(posedge mclk);
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if (mclk_counter !== 735) tb_error("====== CLOCK GENERATOR: SMCLK - LFXT_CLK INPUT (DIV /2) =====");
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if (mclk_counter !== 735) tb_error("====== CLOCK GENERATOR: SMCLK - LFXT_CLK INPUT (DIV /2) =====");
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if (smclk_counter !== 12) tb_error("====== CLOCK GENERATOR: SMCLK - LFXT_CLK INPUT (DIV /2) =====");
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if (smclk_counter !== 12) tb_error("====== CLOCK GENERATOR: SMCLK - LFXT_CLK INPUT (DIV /2) =====");
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// ------- Divider /4 ----------
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// ------- Divider /4 ----------
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@(r15 === 16'h1003);
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@(r15 === 16'h1003);
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@(negedge smclk_en);
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@(negedge smclk_en);
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mclk_counter = 0;
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mclk_counter = 0;
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smclk_counter = 0;
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smclk_counter = 0;
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repeat(735) @(posedge mclk);
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repeat(735) @(posedge mclk);
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if (mclk_counter !== 735) tb_error("====== CLOCK GENERATOR: SMCLK - LFXT_CLK INPUT (DIV /4) =====");
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if (mclk_counter !== 735) tb_error("====== CLOCK GENERATOR: SMCLK - LFXT_CLK INPUT (DIV /4) =====");
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if (smclk_counter !== 6) tb_error("====== CLOCK GENERATOR: SMCLK - LFXT_CLK INPUT (DIV /4) =====");
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if (smclk_counter !== 6) tb_error("====== CLOCK GENERATOR: SMCLK - LFXT_CLK INPUT (DIV /4) =====");
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// ------- Divider /8 ----------
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// ------- Divider /8 ----------
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@(r15 === 16'h1004);
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@(r15 === 16'h1004);
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@(negedge smclk_en);
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@(negedge smclk_en);
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mclk_counter = 0;
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mclk_counter = 0;
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smclk_counter = 0;
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smclk_counter = 0;
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repeat(735) @(posedge mclk);
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repeat(735) @(posedge mclk);
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if (mclk_counter !== 735) tb_error("====== CLOCK GENERATOR: SMCLK - LFXT_CLK INPUT (DIV /8) =====");
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if (mclk_counter !== 735) tb_error("====== CLOCK GENERATOR: SMCLK - LFXT_CLK INPUT (DIV /8) =====");
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if (smclk_counter !== 3) tb_error("====== CLOCK GENERATOR: SMCLK - LFXT_CLK INPUT (DIV /8) =====");
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if (smclk_counter !== 3) tb_error("====== CLOCK GENERATOR: SMCLK - LFXT_CLK INPUT (DIV /8) =====");
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// SMCLK GENERATION - DCO_CLK INPUT
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// SMCLK GENERATION - DCO_CLK INPUT
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//--------------------------------------------------------
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//--------------------------------------------------------
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// ------- Divider /1 ----------
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// ------- Divider /1 ----------
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@(r15 === 16'h2001);
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@(r15 === 16'h2001);
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mclk_counter = 0;
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mclk_counter = 0;
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smclk_counter = 0;
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smclk_counter = 0;
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repeat(600) @(posedge mclk);
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repeat(600) @(posedge mclk);
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if (mclk_counter !== 600) tb_error("====== CLOCK GENERATOR: SMCLK - DCO_CLK INPUT (DIV /1) =====");
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if (mclk_counter !== 600) tb_error("====== CLOCK GENERATOR: SMCLK - DCO_CLK INPUT (DIV /1) =====");
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if (smclk_counter !== 600) tb_error("====== CLOCK GENERATOR: SMCLK - DCO_CLK INPUT (DIV /1) =====");
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if (smclk_counter !== 600) tb_error("====== CLOCK GENERATOR: SMCLK - DCO_CLK INPUT (DIV /1) =====");
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// ------- Divider /2 ----------
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// ------- Divider /2 ----------
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@(r15 === 16'h2002);
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@(r15 === 16'h2002);
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@(negedge smclk_en);
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@(negedge smclk_en);
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mclk_counter = 0;
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mclk_counter = 0;
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smclk_counter = 0;
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smclk_counter = 0;
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repeat(600) @(posedge mclk);
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repeat(600) @(posedge mclk);
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if (mclk_counter !== 600) tb_error("====== CLOCK GENERATOR: SMCLK - DCO_CLK INPUT (DIV /2) =====");
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if (mclk_counter !== 600) tb_error("====== CLOCK GENERATOR: SMCLK - DCO_CLK INPUT (DIV /2) =====");
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if (smclk_counter !== 300) tb_error("====== CLOCK GENERATOR: SMCLK - DCO_CLK INPUT (DIV /2) =====");
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if (smclk_counter !== 300) tb_error("====== CLOCK GENERATOR: SMCLK - DCO_CLK INPUT (DIV /2) =====");
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// ------- Divider /4 ----------
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// ------- Divider /4 ----------
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@(r15 === 16'h2003);
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@(r15 === 16'h2003);
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@(negedge smclk_en);
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@(negedge smclk_en);
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mclk_counter = 0;
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mclk_counter = 0;
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smclk_counter = 0;
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smclk_counter = 0;
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repeat(600) @(posedge mclk);
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repeat(600) @(posedge mclk);
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if (mclk_counter !== 600) tb_error("====== CLOCK GENERATOR: SMCLK - DCO_CLK INPUT (DIV /4) =====");
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if (mclk_counter !== 600) tb_error("====== CLOCK GENERATOR: SMCLK - DCO_CLK INPUT (DIV /4) =====");
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if (smclk_counter !== 150) tb_error("====== CLOCK GENERATOR: SMCLK - DCO_CLK INPUT (DIV /4) =====");
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if (smclk_counter !== 150) tb_error("====== CLOCK GENERATOR: SMCLK - DCO_CLK INPUT (DIV /4) =====");
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// ------- Divider /8 ----------
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// ------- Divider /8 ----------
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@(r15 === 16'h2004);
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@(r15 === 16'h2004);
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@(negedge smclk_en);
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@(negedge smclk_en);
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mclk_counter = 0;
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mclk_counter = 0;
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smclk_counter = 0;
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smclk_counter = 0;
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repeat(600) @(posedge mclk);
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repeat(600) @(posedge mclk);
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if (mclk_counter !== 600) tb_error("====== CLOCK GENERATOR: SMCLK - DCO_CLK INPUT (DIV /8) =====");
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if (mclk_counter !== 600) tb_error("====== CLOCK GENERATOR: SMCLK - DCO_CLK INPUT (DIV /8) =====");
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if (smclk_counter !== 75) tb_error("====== CLOCK GENERATOR: SMCLK - DCO_CLK INPUT (DIV /8) =====");
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if (smclk_counter !== 75) tb_error("====== CLOCK GENERATOR: SMCLK - DCO_CLK INPUT (DIV /8) =====");
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stimulus_done = 1;
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stimulus_done = 1;
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end
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end
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