16位分辨率 ad2s1210驱动verilog驱动代码

下是一个16位分辨率的AD2S1210的Verilog驱动代码：

module ad2s1210_driver (
    input clk,
    input rst,
    input [15:0] data_in,
    output [15:0] data_out,
    output cs,
    output sclk,
    output rd
);

reg [15:0] shift_reg;
reg [3:0] state;
wire [15:0] rom_data;
wire [1:0] rom_address;
wire rom_rd;

assign cs = (state == 4);
assign sclk = (state == 1) || (state == 3);
assign rd = (state == 2);

ad2s1210_rom rom (
    .clk(clk),
    .address(rom_address),
    .data(rom_data),
    .rd(rom_rd)
);

always @(posedge clk) begin
    if (rst) begin
        shift_reg <= 16'h0;
        state <= 4'd0;
    end else begin
        case (state)
            4'd0: begin
                shift_reg <= {shift_reg[14:0], data_in[15]};
                state <= 4'd1;
            end
            4'd1: begin
                shift_reg <= {shift_reg[14:0], data_in[15]};
                state <= 4'd2;
            end
            4'd2: begin
                shift_reg <= {shift_reg[14:0], rom_data[15]};
                state <= 4'd3;
            end
            4'd3: begin
                shift_reg <= {shift_reg[14:0], rom_data[15]};
                state <= 4'd0;
            end
            4'd4: begin
                shift_reg <= {shift_reg[14:0], 1'b0};
                state <= 4'd5;
            end
            4'd5: begin
                shift_reg <= {shift_reg[14:0], 1'b0};
                state <= 4'd0;
            end
            default: begin
                shift_reg <= {shift_reg[14:0], 1'b0};
                state <= 4'd0;
            end
        endcase
    end
end

assign rom_address = shift_reg[9:8];
assign data_out = shift_reg;

endmodule

module ad2s1210_rom (
    input clk,
    input [1:0] address,
    output [15:0] data,
    output rd
);

reg [15:0] rom[4];

initial begin
    // 初始化ROM数据
    rom[0] = 16'h0000;
    rom[1] = 16'hFFFF;
    rom[2] = 16'h5555;
    rom[3] = 16'hAAAA;
end

always @(posedge clk) begin
    case (address)
        2'b00: begin
            data <= rom[0];
        end
        2'b01: begin
            data <= rom[1];
        end
        2'b10: begin
            data <= rom[2];
        end
        2'b11: begin
            data <= rom[3];
        end
    endcase

    rd <= 1'b1;
end

endmodule

这个驱动与之前的驱动类似，只是将数据位宽扩展到了16位，并相应地修改了状态机和ROM数据的位宽。控制模块的状态机有5个状态，分别是：等待数据输入、传输数据到芯片、从芯片中读取数据、传输数据到输出端口和空闲状态。ROM模块包含了4个16位的数据，其中的数据可以根据需要进行修改。