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Line 36... |
//
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//
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//
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//
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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//
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//
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//
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//
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module rxemin(i_clk, i_ce, i_en, i_cancel, i_v, i_d, o_v, o_d, o_err);
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module rxemin(i_clk, i_ce, i_en, i_cancel, i_v, i_d, o_err);
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parameter MINNIBBLES=120;
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parameter MINNIBBLES=120;
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localparam LGNCOUNT=(MINNIBBLES<63)? 6
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localparam LGNCOUNT=(MINNIBBLES<63)? 6
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:((MINNIBBLES<127)? 7:((MINNIBBLES<255)? 8:9));
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:((MINNIBBLES<127)? 7:((MINNIBBLES<255)? 8:9));
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input i_clk, i_ce, i_en, i_cancel;
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input i_clk, i_ce, i_en, i_cancel;
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input i_v; // Valid
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input i_v; // Valid
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input [3:0] i_d; // Data nibble
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input [3:0] i_d; // Data nibble
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output reg o_err;
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output reg o_err;
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reg last_v;
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reg last_v;
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reg [(LGNCOUNT-1):0] r_ncnt;
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reg [(LGNCOUNT-1):0] r_ncnt;
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initial o_v = 1'b0;
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initial last_v = 1'b0;
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initial last_v = 1'b0;
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always @(posedge i_clk)
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always @(posedge i_clk)
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if (i_ce)
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if (i_ce)
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begin
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begin
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last_v <= i_v;
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last_v <= i_v;
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if (((!i_v)&&(!o_v))||(i_cancel))
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if ((!i_v)||(i_cancel))
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begin
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begin
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// Here's our reset. If th input isn't valid (i.e., no
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// packet present), or if we are cancelling the packet,
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// then we come in here and reset our interface.
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r_ncnt <= 0;
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r_ncnt <= 0;
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o_err <= 0;
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o_err <= 0;
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end else if (i_v)
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end else if (i_v)
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begin
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begin
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r_ncnt <= (r_ncnt<MINNIBBLES) ? r_ncnt+1'b1 : r_ncnt;
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r_ncnt <= (r_ncnt<MINNIBBLES) ? r_ncnt+1'b1 : r_ncnt;
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