用verilog封装axis接口例程

以下是一个简单的Verilog代码，用于封装AXI Stream接口：

module axis_wrapper (
  input         clk,
  input         rst,
  input         axis_tvalid,
  output        axis_tready,
  input  [DATA_WIDTH-1:0]  axis_tdata,
  input  [DATA_WIDTH/8-1:0]  axis_tkeep,
  input         axis_tlast,
  output        axis_tvalid_out,
  input         axis_tready_out,
  output [DATA_WIDTH-1:0]  axis_tdata_out,
  output [DATA_WIDTH/8-1:0]  axis_tkeep_out,
  output        axis_tlast_out
);

  // AXI Stream接口的信号转发
  assign axis_tvalid_out  = axis_tvalid;
  assign axis_tdata_out   = axis_tdata;
  assign axis_tkeep_out   = axis_tkeep;
  assign axis_tlast_out   = axis_tlast;
  assign axis_tready      = axis_tready_out;

  // 添加时钟和重置信号，以及时序逻辑
  reg [1:0] state = 0;
  always @(posedge clk) begin
    if (rst) begin
      state <= 0;
    end else begin
      case (state)
        0: begin // 空闲状态
          if (axis_tvalid) begin
            state <= 1;
          end
        end
        1: begin // 数据传输状态
          if (axis_tready_out) begin
            state <= 0;
          end
        end
      endcase
    end
  end
endmodule

该代码模块将AXI Stream接口封装成一个带时序逻辑的模块，使其他模块可以使用该模块来进行数据传输。需要注意的是，该代码中的 `DATA_WIDTH` 需要根据具体应用进行修改。