//---------------------------------------------------------------------------------------
//    filename: cmd_line_buffer.sv
// description: command line buffer
//      author: leguoqing@paisat.cn
//---------------------------------------------------------------------------------------

module cmd_line_buffer
#(
    parameter MODULE_FREQ_HZ    = 50,
    parameter BUF_SIZE          = 4096,
    parameter MAX_LINE_LEN      = 256
)(
    input  logic    clk,
    input  logic    resetn,

    // interface to byte stream of CLI
    input  logic        byte_in_valid,
    input  logic [7:0]  byte_in_data,
    output logic        byte_in_ready,

    output logic        byte_out_valid,
    output logic [7:0]  byte_out_data,
    input  logic        byte_out_ready,

    // interface to cli2axil
    input  logic        from_cli_valid,
    input  logic [7:0]  from_cli_data,
    output logic        from_cli_ready,

    output logic        to_cli_valid,
    output logic [7:0]  to_cli_data,
    output logic        to_cli_last,
    input  logic        to_cli_ready

);

    localparam integer MODULE_FREQ_MHZ = MODULE_FREQ_HZ / 1e6;
    localparam integer MAX_LINE_CNT    = BUF_SIZE / MAX_LINE_LEN;
    localparam integer PTR_WIDTH       = $clog2(BUF_SIZE);
    localparam integer LINE_LEN_WIDTH  = $clog2(MAX_LINE_LEN);
    localparam integer LINE_CNT_WIDTH  = $clog2(MAX_LINE_CNT);


    // RX buffer
    logic [7:0] rx_buffer [0:BUF_SIZE-1];

    logic 

    logic [PTR_WIDTH-1:0] wr_ptr;
    logic [PTR_WIDTH-1:0] rd_ptr;

    logic [LINE_CNT_WIDTH:0] wr_idx;
    logic [LINE_CNT_WIDTH:0] rd_idx;
    logic [LINE_CNT_WIDTH:0] history_idx;



endmodule