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https://opencores.org/ocsvn/versatile_library/versatile_library/trunk
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wire [1:0] wbm_bte_o;
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wire [1:0] wbm_bte_o;
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wire [2:0] wbm_cti_o;
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wire [2:0] wbm_cti_o;
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wire wbm_we_o, wbm_cyc_o, wbm_stb_o, wbm_ack_i;
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wire wbm_we_o, wbm_cyc_o, wbm_stb_o, wbm_ack_i;
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reg last_cyc;
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reg last_cyc;
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reg [3:0] counter;
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reg [3:0] counter;
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reg read_busy;
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always @ (posedge clk or posedge rst)
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always @ (posedge clk or posedge rst)
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if (rst)
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if (rst)
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last_cyc <= 1'b0;
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last_cyc <= 1'b0;
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else
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else
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last_cyc <= wbm_cyc_o;
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last_cyc <= wbm_cyc_o;
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/*
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always @ (posedge clk or posedge rst)
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always @ (posedge clk or posedge rst)
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if (rst)
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if (rst)
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read_busy <= 1'b0;
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read <= 1'b0;
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else
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else
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if (read & !waitrequest)
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if (!last_cyc & wbm_cyc_o & !wbm_we_o)
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read_busy <= 1'b1;
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read <= 1'b1;
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else if (wbm_ack_i & wbm_cti_o!=3'b010)
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else if (!waitrequest)
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read_busy <= 1'b0;
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read <= 1'b0;
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assign read = wbm_cyc_o & wbm_stb_o & !wbm_we_o & !read_busy;
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*/
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assign read = wbm_cyc_o & wbm_stb_o & !wbm_we_o & counter!=4'd0;
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assign beginbursttransfer = (!last_cyc & wbm_cyc_o) & wbm_cti_o==3'b010;
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assign beginbursttransfer = (!last_cyc & wbm_cyc_o) & wbm_cti_o==3'b010;
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assign burstcount = (wbm_bte_o==2'b01) ? 4'd4 :
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assign burstcount = (wbm_bte_o==2'b01) ? 4'd4 :
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(wbm_bte_o==2'b10) ? 4'd8 :
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(wbm_bte_o==2'b10) ? 4'd8 :
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(wbm_bte_o==2'b11) ? 4'd16:
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(wbm_bte_o==2'b11) ? 4'd16:
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4'd1;
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4'd1;
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assign wbm_ack_i = (readdatavalid & !waitrequest) | (write & !waitrequest);
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assign wbm_ack_i = (readdatavalid) | (write & !waitrequest);
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always @ (posedge clk or posedge rst)
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always @ (posedge clk or posedge rst)
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if (rst) begin
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if (rst) begin
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counter <= 4'd0;
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counter <= 4'd0;
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end else
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end else
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if (wbm_we_o) begin
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if (wbm_we_o) begin
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