////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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// This sourcecode is released under BSD license.
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// This sourcecode is released under BSD license.
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// Please see http://www.opensource.org/licenses/bsd-license.php for details!
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// Please see http://www.opensource.org/licenses/bsd-license.php for details!
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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//
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//
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// Copyright (c) 2010, Stefan Fischer <Ste.Fis@OpenCores.org>
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// Copyright (c) 2010, Stefan Fischer <Ste.Fis@OpenCores.org>
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// All rights reserved.
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// All rights reserved.
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//
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//
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// Redistribution and use in source and binary forms, with or without
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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// modification, are permitted provided that the following conditions are met:
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//
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//
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// * Redistributions of source code must retain the above copyright notice,
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// and/or other materials provided with the distribution.
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// * Neither the name of the author nor the names of his contributors may be
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// * Neither the name of the author nor the names of his contributors may be
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// used to endorse or promote products derived from this software without
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// used to endorse or promote products derived from this software without
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// specific prior written permission.
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// specific prior written permission.
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//
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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// POSSIBILITY OF SUCH DAMAGE.
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//
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//
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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// filename: picoblaze_wb_gpio.v
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// filename: picoblaze_wb_gpio.v
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// description: synthesizable PicoBlaze (TM) general purpose i/o example using
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// description: synthesizable PicoBlaze (TM) general purpose i/o example using
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// wishbone
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// wishbone
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// todo4user: add other modules as needed
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// todo4user: add other modules as needed
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// version: 0.0.0
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// version: 0.0.0
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// changelog: - 0.0.0, initial release
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// changelog: - 0.0.0, initial release
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// - ...
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// - ...
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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module picoblaze_wb_gpio (
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module picoblaze_wb_gpio (
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p_rst_i,
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p_rst_i,
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p_clk_i,
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p_clk_i,
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p_gpio_io
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p_gpio_io
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);
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);
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input p_rst_i;
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input p_rst_i;
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wire p_rst_i;
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wire p_rst_i;
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input p_clk_i;
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input p_clk_i;
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wire p_clk_i;
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wire p_clk_i;
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inout[7:0] p_gpio_io;
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inout[7:0] p_gpio_io;
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wire [7:0] p_gpio_io;
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wire [7:0] p_gpio_io;
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reg rst;
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reg rst;
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wire clk;
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wire clk;
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wire wb_cyc;
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wire wb_cyc;
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wire wb_stb;
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wire wb_stb;
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wire wb_we;
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wire wb_we;
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wire[7:0] wb_adr;
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wire[7:0] wb_adr;
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wire[7:0] wb_dat_m2s;
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wire[7:0] wb_dat_m2s;
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wire[7:0] wb_dat_s2m;
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wire[7:0] wb_dat_s2m;
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wire wb_ack;
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wire wb_ack;
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wire pb_write_strobe;
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wire pb_write_strobe;
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wire pb_read_strobe;
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wire pb_read_strobe;
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wire[7:0] pb_port_id;
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wire[7:0] pb_port_id;
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wire[7:0] pb_in_port;
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wire[7:0] pb_in_port;
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wire[7:0] pb_out_port;
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wire[7:0] pb_out_port;
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wire[17:0] instruction;
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wire[17:0] instruction;
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wire[9:0] address;
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wire[9:0] address;
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wire interrupt;
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wire interrupt;
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wire interrupt_ack;
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wire interrupt_ack;
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wire[7:0] gpio_in;
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wire[7:0] gpio_in;
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wire[7:0] gpio_out;
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wire[7:0] gpio_out;
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wire[7:0] gpio_oe;
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wire[7:0] gpio_oe;
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reg [7:0] gpio;
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reg [7:0] gpio;
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parameter IS_INPUT = 1'b0;
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parameter IS_INPUT = 1'b0;
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parameter IS_OUTPUT = ! IS_INPUT;
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parameter IS_OUTPUT = ! IS_INPUT;
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integer i;
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integer i;
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// reset synchronisation
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// reset synchronisation
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always@(clk) begin
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always@(clk)
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rst <= p_rst_i;
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rst <= p_rst_i;
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end
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assign clk = p_clk_i;
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assign clk = p_clk_i;
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// module instances
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// module instances
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///////////////////
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///////////////////
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kcpsm3 inst_kcpsm3 (
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kcpsm3 inst_kcpsm3 (
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.address(address),
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.address(address),
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.instruction(instruction),
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.instruction(instruction),
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.port_id(pb_port_id),
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.port_id(pb_port_id),
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.write_strobe(pb_write_strobe),
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.write_strobe(pb_write_strobe),
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.out_port(pb_out_port),
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.out_port(pb_out_port),
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.read_strobe(pb_read_strobe),
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.read_strobe(pb_read_strobe),
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.in_port(pb_in_port),
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.in_port(pb_in_port),
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.interrupt(interrupt),
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.interrupt(interrupt),
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.interrupt_ack(interrupt_ack),
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.interrupt_ack(interrupt_ack),
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.reset(rst),
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.reset(rst),
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.clk(clk)
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.clk(clk)
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);
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);
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pbwbgpio inst_pbwbgpio (
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pbwbgpio inst_pbwbgpio (
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.address(address),
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.address(address),
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.instruction(instruction),
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.instruction(instruction),
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.clk(clk)
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.clk(clk)
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);
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);
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wbm_picoblaze inst_wbm_picoblaze (
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wbm_picoblaze inst_wbm_picoblaze (
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.rst(rst),
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.rst(rst),
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.clk(clk),
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.clk(clk),
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.wbm_cyc_o(wb_cyc),
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.wbm_cyc_o(wb_cyc),
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.wbm_stb_o(wb_stb),
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.wbm_stb_o(wb_stb),
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.wbm_we_o(wb_we),
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.wbm_we_o(wb_we),
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.wbm_adr_o(wb_adr),
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.wbm_adr_o(wb_adr),
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.wbm_dat_m2s_o(wb_dat_m2s),
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.wbm_dat_m2s_o(wb_dat_m2s),
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.wbm_dat_s2m_i(wb_dat_s2m),
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.wbm_dat_s2m_i(wb_dat_s2m),
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.wbm_ack_i(wb_ack),
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.wbm_ack_i(wb_ack),
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.pb_port_id_i(pb_port_id),
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.pb_port_id_i(pb_port_id),
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.pb_write_strobe_i(pb_write_strobe),
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.pb_write_strobe_i(pb_write_strobe),
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.pb_out_port_i(pb_out_port),
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.pb_out_port_i(pb_out_port),
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.pb_read_strobe_i(pb_read_strobe),
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.pb_read_strobe_i(pb_read_strobe),
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.pb_in_port_o(pb_in_port)
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.pb_in_port_o(pb_in_port)
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);
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);
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wbs_gpio inst_wbs_gpio (
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wbs_gpio inst_wbs_gpio (
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.rst(rst),
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.rst(rst),
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.clk(clk),
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.clk(clk),
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.wbs_cyc_i(wb_cyc),
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.wbs_cyc_i(wb_cyc),
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.wbs_stb_i(wb_stb),
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.wbs_stb_i(wb_stb),
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.wbs_we_i(wb_we),
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.wbs_we_i(wb_we),
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.wbs_adr_i(wb_adr),
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.wbs_adr_i(wb_adr),
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.wbs_dat_m2s_i(wb_dat_m2s),
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.wbs_dat_m2s_i(wb_dat_m2s),
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.wbs_dat_s2m_o(wb_dat_s2m),
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.wbs_dat_s2m_o(wb_dat_s2m),
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.wbs_ack_o(wb_ack),
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.wbs_ack_o(wb_ack),
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.gpio_in_i(gpio_in),
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.gpio_in_i(gpio_in),
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.gpio_out_o(gpio_out),
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.gpio_out_o(gpio_out),
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.gpio_oe_o(gpio_oe)
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.gpio_oe_o(gpio_oe)
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);
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);
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// i/o buffer generation
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// i/o buffer generation
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assign gpio_in = p_gpio_io;
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assign gpio_in = p_gpio_io;
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always@(gpio_oe or gpio_out) begin
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always@(gpio_oe or gpio_out)
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for (i = 0; i <= 7; i = i + 1) begin
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for (i = 0; i <= 7; i = i + 1)
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if (gpio_oe[i] == IS_OUTPUT)
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if (gpio_oe[i] == IS_OUTPUT)
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gpio[i] = gpio_out[i];
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gpio[i] = gpio_out[i];
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else
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else
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gpio[i] = 1'bZ;
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gpio[i] = 1'bZ;
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end
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end
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assign p_gpio_io = gpio;
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assign p_gpio_io = gpio;
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endmodule
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endmodule
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