module ARINC818_FILE(
input clk,
input rst_n,
input [31:0] container_cnt, // 容器计数
input [15:0] advb_frame_cnt, // advb帧计数
input advb_frame_last, // ADVB最后一帧
input [15:0] img_width, // 图像宽度
input [15:0] img_high, // 图像高度
output reg [31:0] sofi, // 首帧起始定界符
output reg [31:0] sofn, // 非首帧起始定界符
output reg [31:0] eofn, // 非最后帧结束定界符
output reg [31:0] eoft, // 最后帧结束定界符
output reg [31:0] advb_idle, // advb帧间隙字符
output reg [31:0] frame_words0_r_ctl,
output reg [31:0] frame_words0_dst_id,
output reg [31:0] frame_words1_cs_ctl,
output reg [31:0] frame_words1_src_id,
output reg [31:0] frame_words2_type,
output reg [31:0] frame_words2_f_ctl,
output reg [31:0] frame_words3_seq_id,
output reg [31:0] frame_words3_df_ctl,
output reg [31:0] frame_words3_seq_cnt,
output reg [31:0] frame_words4_OX_RX_ID,
output reg [31:0] frame_words5_parameter,
output reg [31:0] container_words0_cnt,
output reg [31:0] container_words1_id,
output reg [31:0] container_words2_time,
output reg [31:0] container_words3_time,
output reg [31:0] container_words4_fps,
output reg [31:0] container_words4_rate
);
// K28.5, D21.5, D22.2编码示例（ARINC 818协议定义的字符编码）
localparam [7:0] K28_5 = 8'hBC; // 示例码，真实协议确认
localparam [7:0] D21_5 = 8'h95;
localparam [7:0] D22_2 = 8'hB5;
localparam [31:0] SOFI_VAL = {K28_5, D21_5, D22_2, D22_2};
localparam [31:0] SOFN_VAL = {K28_5, D21_5, D21_5, D22_2};
localparam [31:0] EOFN_VAL = {K28_5, D22_2, D21_5, D21_5};
localparam [31:0] EOFT_VAL = {K28_5, D22_2, D22_2, D21_5};
localparam [31:0] ADVB_IDLE_VAL = 32'hBC95_B5B5; // 休止符
// 初始化和状态更新
always @(posedge clk or negedge rst_n) begin
if (!rst_n) begin
sofi <= SOFI_VAL;
sofn <= SOFN_VAL;
eofn <= EOFN_VAL;
eoft <= EOFT_VAL;
advb_idle <= ADVB_IDLE_VAL;
// 这里frame_words*和container_words*初始化为0或默认值
frame_words0_r_ctl <= 32'd0;
frame_words0_dst_id <= 32'd0;
frame_words1_cs_ctl <= 32'd0;
frame_words1_src_id <= 32'd0;
frame_words2_type <= 32'd0;
frame_words2_f_ctl <= 32'd0;
frame_words3_seq_id <= 32'd0;
frame_words3_df_ctl <= 32'd0;
frame_words3_seq_cnt <= 32'd0;
frame_words4_OX_RX_ID <= 32'd0;
frame_words5_parameter <= 32'd0;
container_words0_cnt <= 32'd0;
container_words1_id <= 32'd0;
container_words2_time <= 32'd0;
container_words3_time <= 32'd0;
container_words4_fps <= 32'd0;
container_words4_rate <= 32'd0;
end else begin
// 根据advb_frame_last控制使用SOFI或SOFN
sofi <= advb_frame_last ? SOFI_VAL : sofi;
sofn <= (!advb_frame_last) ? SOFN_VAL : sofn;
eofn <= (!advb_frame_last) ? EOFN_VAL : eofn;
eoft <= advb_frame_last ? EOFT_VAL : eoft;
// 赋值frame_words，示例根据计数器简单赋值，可根据协议详细填写
frame_words0_r_ctl <= {16'd0, advb_frame_cnt}; // 示例：下16位为帧计数
frame_words0_dst_id <= 32'h0000_0001; // 目的ID示例
frame_words1_cs_ctl <= 32'h0000_0000; // 控制字段示例
frame_words1_src_id <= 32'h0000_0002; // 源ID示例
frame_words2_type <= 32'h0000_0001; // 帧类型示例
frame_words2_f_ctl <= 32'h0000_0000; // 帧控制示例
frame_words3_seq_id <= 32'h0000_0000; // 序列ID示例
frame_words3_df_ctl <= 32'h0000_0000; // DF控制示例
frame_words3_seq_cnt <= {16'd0, advb_frame_cnt}; // 序列计数示例
frame_words4_OX_RX_ID <= 32'h0000_0000; // OX/RX示例
frame_words5_parameter <= {img_width, img_high}; // 图片分辨率打包示例
// 容器相关信息直接赋值
container_words0_cnt <= container_cnt;
container_words1_id <= 32'h0000_0001; // 容器ID示例
container_words2_time <= 32'd0; // 时间戳示例
container_words3_time <= 32'd0; // 时间戳示例
container_words4_fps <= 32'd60; // 帧率示例
container_words4_rate <= 32'd1000; // 码率示例
end
end
endmodule