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robfinch |
`timescale 1ns / 1ps
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// ============================================================================
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// __
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// \\__/ o\ (C) 2015-2022 Robert Finch, Waterloo
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// \ __ / All rights reserved.
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// \/_// robfinch@finitron.ca
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// ||
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//
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// BSD 3-Clause License
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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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//
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// 1. Redistributions of source code must retain the above copyright notice, this
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// list of conditions and the following disclaimer.
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//
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// 2. 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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// and/or other materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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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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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// ============================================================================
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//
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import mpmc8_pkg::*;
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module mpmc8_set_num_strips(clk, state, ch,
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we0, we1, we2, we3, we4, we5, we6, we7, num_strips);
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parameter S0 = 3'd7;
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parameter S1 = 3'd1;
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parameter S2 = 3'd0;
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parameter S3 = 3'd0;
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parameter S4 = 3'd0;
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parameter S5 = 3'd3;
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parameter S6 = 3'd0;
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parameter S7 = 3'd3;
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input clk;
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input [3:0] state;
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input [3:0] ch;
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input we0;
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input we1;
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input we2;
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input we3;
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input we4;
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input we5;
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input we6;
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input we7;
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output reg [2:0] num_strips;
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// Setting burst length
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always_ff @(posedge clk)
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if (state==IDLE) begin
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num_strips <= 3'd0;
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case(ch)
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4'd0: if (!we0) num_strips <= S0; //7
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4'd1: if (!we1) num_strips <= S1; //1
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4'd2: if (!we2) num_strips <= S2;
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4'd3: if (!we3) num_strips <= S3;
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4'd4: if (!we4) num_strips <= S4;
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4'd5: if (!we5) num_strips <= S5; //3
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4'd6: if (!we6) num_strips <= S6;
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4'd7: if (!we7) num_strips <= S7;
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default: ;
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endcase
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end
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endmodule
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