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[/] [srdydrdy_lib/] [trunk/] [examples/] [bridge/] [rtl/] [sd_tx_gigmac.v] - Diff between revs 8 and 11

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Rev 8 Rev 11
Line 8... Line 8... 
 
 
 
 
module sd_tx_gigmac
 
module sd_tx_gigmac
 
  (
 
  (
 
   input        clk,
 
   input        clk,
 
   input        reset,
 
   input        reset,
 
   output reg        gmii_tx_dv,
 
   output reg        gmii_tx_en,
 
   output reg [7:0]  gmii_txd,
 
   output reg [7:0]  gmii_txd,
 
 
 
 
 
   input       txg_srdy,
 
   input       txg_srdy,
 
   output      txg_drdy,
 
   output      txg_drdy,
 
   input [1:0] txg_code,
 
   input [1:0] txg_code,
Line 24... Line 24... 
  wire [1:0]   ip_code;
 
  wire [1:0]   ip_code;
 
  wire [7:0]   ip_data;
 
  wire [7:0]   ip_data;
 
  reg [3:0]    count, nxt_count;
 
  reg [3:0]    count, nxt_count;
 
 
 
 
 
  reg [7:0]    nxt_gmii_txd;
 
  reg [7:0]    nxt_gmii_txd;
 
  reg          nxt_gmii_tx_dv;
 
  reg          nxt_gmii_tx_en;
 
  reg [3:0]    state, nxt_state;
 
  reg [3:0]    state, nxt_state;
 
 
 
 
 
  localparam s_idle = 0, s_preamble = 1, s_payload = 2, s_ipg = 3;
 
  localparam s_idle = 0, s_preamble = 1, s_payload = 2, s_ipg = 3;
 
  localparam ns_idle = 1, ns_preamble = 2, ns_payload = 4, ns_ipg = 8;
 
  localparam ns_idle = 1, ns_preamble = 2, ns_payload = 4, ns_ipg = 8;
 
 
 
 
Line 47... Line 47... 
 
 
 
 
  always @*
 
  always @*
 
    begin
 
    begin
 
      ip_drdy = 0;
 
      ip_drdy = 0;
 
      nxt_count = count;
 
      nxt_count = count;
 
      nxt_gmii_tx_dv = 0;
 
      nxt_gmii_tx_en = 0;
 
      nxt_gmii_txd = gmii_txd;
 
      nxt_gmii_txd = gmii_txd;
 
 
 
 
 
      case (1'b1)
 
      case (1'b1)
 
        state[s_idle] :
 
        state[s_idle] :
 
          begin
 
          begin
 
            if (ip_srdy & (ip_code == `PCC_SOP))
 
            if (ip_srdy & (ip_code == `PCC_SOP))
 
              begin
 
              begin
 
                nxt_gmii_tx_dv = 1;
 
                nxt_gmii_tx_en = 1;
 
                nxt_gmii_txd = `GMII_PRE;
 
                nxt_gmii_txd = `GMII_PRE;
 
                nxt_count = 1;
 
                nxt_count = 1;
 
                nxt_state = ns_preamble;
 
                nxt_state = ns_preamble;
 
              end
 
              end
 
            else
 
            else
Line 69... Line 69... 
          end // case: state[s_idle]
 
          end // case: state[s_idle]
 
 
 
 
 
        state[s_preamble] :
 
        state[s_preamble] :
 
          begin
 
          begin
 
            nxt_count = count + 1;
 
            nxt_count = count + 1;
 
            nxt_gmii_tx_dv = 1;
 
            nxt_gmii_tx_en = 1;
 
            if (count == 6)
 
            if (count == 6)
 
 
 
              begin
 
              nxt_gmii_txd = `GMII_SFD;
 
              nxt_gmii_txd = `GMII_SFD;
 
 
 
                nxt_state = ns_payload;
 
 
 
              end
 
            else
 
            else
 
              nxt_gmii_txd = `GMII_PRE;
 
              nxt_gmii_txd = `GMII_PRE;
 
 
 
 
 
            if (count == 7)
 
 
 
              nxt_state = ns_payload;
 
 
 
          end // case: state[s_preamble]
 
          end // case: state[s_preamble]
 
 
 
 
 
        state[s_payload] :
 
        state[s_payload] :
 
          begin
 
          begin
 
            ip_drdy = 1;
 
            ip_drdy = 1;
 
 
 
            nxt_gmii_tx_en = 1;
 
 
 
            nxt_gmii_txd = ip_data;
 
 
 
 
 
            if (!ip_srdy | ((ip_code == `PCC_EOP) | (ip_code == `PCC_BADEOP)))
 
            if (!ip_srdy | ((ip_code == `PCC_EOP) | (ip_code == `PCC_BADEOP)))
 
              begin
 
              begin
 
                nxt_gmii_tx_dv = 0;
 
 
 
                nxt_count = 0;
 
                nxt_count = 0;
 
                nxt_state = ns_ipg;
 
                nxt_state = ns_ipg;
 
              end
 
              end
 
          end // case: state[s_payload]
 
          end // case: state[s_payload]
 
 
 
 
 
        state[s_ipg] :
 
        state[s_ipg] :
 
          begin
 
          begin
 
            nxt_gmii_tx_dv = 0;
 
            nxt_gmii_tx_en = 0;
 
            ip_drdy = 0;
 
            ip_drdy = 0;
 
            nxt_count = count + 1;
 
            nxt_count = count + 1;
 
            if (count == 11)
 
            if (count == 11)
 
              nxt_state = ns_idle;
 
              nxt_state = ns_idle;
 
          end
 
          end
Line 112... Line 113... 
        begin
 
        begin
 
          state <= #1 1;
 
          state <= #1 1;
 
          /*AUTORESET*/
 
          /*AUTORESET*/
 
          // Beginning of autoreset for uninitialized flops
 
          // Beginning of autoreset for uninitialized flops
 
          count <= 4'h0;
 
          count <= 4'h0;
 
          gmii_tx_dv <= 1'h0;
 
          gmii_tx_en <= 1'h0;
 
          gmii_txd <= 8'h0;
 
          gmii_txd <= 8'h0;
 
          // End of automatics
 
          // End of automatics
 
        end
 
        end
 
      else
 
      else
 
        begin
 
        begin
 
          state <= #1 nxt_state;
 
          state <= #1 nxt_state;
 
          count <= #1 nxt_count;
 
          count <= #1 nxt_count;
 
          gmii_tx_dv <= #1 nxt_gmii_tx_dv;
 
          gmii_tx_en <= #1 nxt_gmii_tx_en;
 
          gmii_txd   <= #1 nxt_gmii_txd;
 
          gmii_txd   <= #1 nxt_gmii_txd;
 
        end // else: !if(reset)
 
        end // else: !if(reset)
 
    end // always @ (posedge clk)
 
    end // always @ (posedge clk)
 
 
 
 
 
endmodule // sd_rx_gigmac
 
endmodule // sd_rx_gigmac

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