用verilog写一段代码 实现串口读取bmp图片后发送到FIFO

下面是一个简单的 Verilog 代码片段，可以实现串口读取 BMP 图片并将其发送到 FIFO。

// 定义接收数据的状态
typedef enum logic [2:0] {
  IDLE,
  HEADER,
  SIZE,
  IMAGE_DATA
} state_t;

module bmp_reader (
  input clk,
  input rst,
  input rx,
  output reg [7:0] fifo_data,
  output reg fifo_en
);

// 定义 BMP 头部信息
typedef struct packed {
  logic [15:0] type;
  logic [31:0] size;
  logic [15:0] reserved1;
  logic [15:0] reserved2;
  logic [31:0] offset;
} bmp_header_t;

// 定义状态机变量
state_t state;
bmp_header_t header;
logic [31:0] image_size;
logic [31:0] image_offset;
logic [31:0] byte_cnt;
logic [23:0] pixel_data;

// 状态机
always @ (posedge clk) begin
  if (rst) begin
    state <= IDLE;
    byte_cnt <= 0;
    fifo_en <= 0;
    fifo_data <= 0;
  end else begin
    case (state)
      IDLE:
        if (rx == 0xAA) begin
          state <= HEADER;
        end
      HEADER:
        header.type[15:8] <= rx;
        header.type[7:0] <= #1 rx;
        if (header.type == 0x424D) begin
          state <= SIZE;
        end else begin
          state <= IDLE;
        end
      SIZE:
        header.size[31:24] <= rx;
        header.size[23:16] <= #1 rx;
        header.size[15:8] <= #1 rx;
        header.size[7:0] <= #1 rx;
        header.reserved1[15:8] <= #1 rx;
        header.reserved1[7:0] <= #1 rx;
        header.reserved2[15:8] <= #1 rx;
        header.reserved2[7:0] <= #1 rx;
        header.offset[31:24] <= #1 rx;
        header.offset[23:16] <= #1 rx;
        header.offset[15:8] <= #1 rx;
        header.offset[7:0] <= #1 rx;
        image_size <= header.size - header.offset;
        image_offset <= header.offset;
        byte_cnt <= 0;
        state <= IMAGE_DATA;
      IMAGE_DATA:
        if (byte_cnt < image_size) begin
          pixel_data[23:16] <= rx;
          pixel_data[15:8] <= #1 rx;
          pixel_data[7:0] <= #1 rx;
          byte_cnt <= byte_cnt + 3;
          fifo_data <= pixel_data[23:16];
          fifo_en <= 1;
        end else begin
          state <= IDLE;
          fifo_en <= 0;
        end
    endcase
  end
end

endmodule

注意：这只是一个简单的例子，实际上需要根据具体的 BMP 文件格式进行修改。同时，需要根据具体的 FIFO 模块进行修改。