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https://opencores.org/ocsvn/srdydrdy_lib/srdydrdy_lib/trunk
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| Rev 18 |
Rev 19 |
| Line 22... |
Line 22... |
output reg p_drdy,
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output reg p_drdy,
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input [txid_sz-1:0] p_txid,
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input [txid_sz-1:0] p_txid,
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input [width-1:0] p_data
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input [width-1:0] p_data
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);
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);
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localparam pat_dep = 8;
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reg [width-1:0] sbmem [0:items-1];
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reg [width-1:0] sbmem [0:items-1];
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reg [7:0] drdy_pat;
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integer dpp;
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reg nxt_p_drdy;
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reg [width-1:0] outbuf[0:items-1];
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initial
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begin
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drdy_pat = {pat_dep{1'b1}};
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dpp = 0;
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end
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always @*
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begin
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nxt_p_drdy = p_drdy;
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if (p_srdy & p_drdy)
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begin
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if (drdy_pat[dpp])
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begin
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nxt_p_drdy = 1;
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end
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else
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nxt_p_drdy = 0;
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end
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else if (!p_drdy)
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begin
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if (drdy_pat[dpp])
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begin
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nxt_p_drdy = 1;
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end
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else
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nxt_p_drdy = 0;
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end
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end // always @ *
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always @(posedge clk)
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begin
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if ((c_srdy & p_drdy) | !p_drdy)
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dpp = (dpp + 1) % pat_dep;
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p_drdy <= #1 nxt_p_drdy;
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end
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always @(posedge clk)
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always @(posedge clk)
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begin
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begin
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if (c_srdy & c_drdy & (c_req_type == 1))
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if (c_srdy & c_drdy & (c_req_type == 1))
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begin
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begin
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sbmem[c_itemid] <= #20 (sbmem[c_itemid] & ~c_mask) | (c_data & c_mask);
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sbmem[c_itemid] <= #18 (sbmem[c_itemid] & ~c_mask) | (c_data & c_mask);
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end
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else if (c_srdy & c_drdy & (c_req_type == 0))
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begin
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outbuf[c_itemid] = sbmem[c_itemid];
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end
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end
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if (p_srdy & p_drdy)
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if (p_srdy & p_drdy)
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begin
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begin
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if (p_data != sbmem[p_txid])
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if (p_data != outbuf[p_txid])
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begin
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begin
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$display ("%t: ERROR: sb returned %x, expected %x",
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$display ("%t: ERROR: sb returned %x, expected %x",
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$time, p_data, sbmem[p_txid]);
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$time, p_data, outbuf[p_txid]);
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end
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end
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end
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end
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end
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end
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initial
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initial
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