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UDP_data_process/UDP_data_process.v

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上传文件至 / 初步完成所有功能，但两个接收解析和接收转发未合并
2025-11-05 14:39:48 +08:00
`timescale 1ns / 1ps
//////////////////////////////////////////////////////////////////////////////////
// Company:
// Engineer:
//
// Create Date: 2025/10/31 16:59:43
// Design Name:
// Module Name: UDP_data_process
// Project Name:
// Target Devices:
// Tool Versions:
// Description:
//
// Dependencies:
//
// Revision:
// Revision 0.01 - File Created
// Additional Comments:
//
//////////////////////////////////////////////////////////////////////////////////
`timescale 1ns / 1ps
module UDP_data_process (
input clk,
input reset,
input eth_linked,
output reg pulse_second,
// input data_fifo_rden,
// UDP接收FIFO接口
output reg udp_app_recv_fifo_rden,
input [7:0] udp_app_recv_fifo_rddata,
input [11:0] udp_app_recv_fifo_rdcnt,
input udp_app_recv_fifo_empty,
// UDP发送FIFO接口
input udp_app_send_fifo_rden,
output [7:0] udp_app_send_fifo_rddata,
output [11:0] udp_app_send_fifo_rdcnt,
output udp_app_send_fifo_empty,
// TOE寄存器接口
output reg TOE_reg_wren,
output reg TOE_reg_rden,
output reg [65:0] TOE_reg_din,
input TOE_reg_out_valid,
input [65:0] TOE_reg_dout,
// 通信板(CMU)状态信息接口
output CMU_Status_Info_ready,
input CMU_Status_Info_valid,
input CMU_Status_Info_last,
input [31:0] CMU_Status_Info_data,
// 调控板(XYZ)状态信息接口
output XYZ_Status_Info_ready,
input XYZ_Status_Info_valid,
input XYZ_Status_Info_last,
input [31:0] XYZ_Status_Info_data,
// 读出板(DAQ)状态信息接口
output DAQ_Status_Info_ready,
input DAQ_Status_Info_valid,
input DAQ_Status_Info_last,
input [31:0] DAQ_Status_Info_data
);
// wire udp_app_recv_fifo_rden_r;
wire udp_app_recv_fifo_ready;
wire udp_recv_data_tvalid;
wire [31:0]udp_recv_data;
// 协议头
parameter [15:0] HDR_DATA = 16'h4d44;
parameter [15:0] HDR_CTRL = 16'h4547;
parameter [15:0] HDR_TOE = 16'h494e;
// 4个状态：空闲、读Header、读Length、读Payload&Check
reg [1:0] parse_state;
localparam P_IDLE = 2'd0;
localparam P_DATA = 2'd1;
reg [2:0] deal_state;
reg deal_busy;
localparam D_IDLE = 3'd0;
localparam D_HEAD = 3'd1;
localparam D_TOE_1 = 3'd2;
localparam D_TOE_2 = 3'd3;
localparam D_EXE = 3'd4;
localparam D_CTRL =3'd5;
reg [3:0]TOE_SFP_ID;
reg TOE_RW_FLAG;
reg [31:0] TOE_ADDR;
reg [31:0] TOE_DATA;
reg [15:0] header_reg;
reg [15:0] length_reg;
reg [31:0] data_reg;
reg [31:0] crc32_calc;
reg [31:0] crc32_recv;
reg [15:0] payload_remain;
reg recv_udp_frame_last;
reg crc_match; // CRC校验匹配标记
wire crc_error;
wire [31:0]udp_recv_data_reorder;
reg cnt;
wire data_fifo_rst ;
reg data_fifo_wren;
reg [31:0] data_fifo_din;
reg data_fifo_rden;
wire [31:0] data_fifo_dout;
wire data_fifo_empty;
wire data_fifo_full;
reg state_report_en;
reg [27:0] second_timer = 'b0;
// ---------------------------
// 读取FIFO逻辑
// ---------------------------
always@(posedge clk)
if(reset)
udp_app_recv_fifo_rden <= 1'b0;
else if((~udp_app_recv_fifo_empty) && udp_app_recv_fifo_ready && (~deal_busy))
udp_app_recv_fifo_rden <= 1'b1;
else if(udp_app_recv_fifo_rdcnt == 12'b0)
udp_app_recv_fifo_rden <= 1'b0;
else
udp_app_recv_fifo_rden <= 1'b0;
//assign udp_app_recv_fifo_rden_r = udp_app_recv_fifo_rden && (~udp_app_recv_fifo_empty); // udp recv data does not delay, so the en needn't delay
axis_dwidth_converter_0 axis_dwidth_converter_udprx(
.aclk (clk), // input
.aresetn (~reset), // input
.s_axis_tvalid(udp_app_recv_fifo_rden), // input
.s_axis_tready(udp_app_recv_fifo_ready), // output
.s_axis_tdata (udp_app_recv_fifo_rddata), // input [7:0]
.m_axis_tvalid(udp_recv_data_tvalid), // output
.m_axis_tready(1'b1), // input
.m_axis_tdata (udp_recv_data) // output [63:0]
);
assign udp_recv_data_reorder = {udp_recv_data[7:0], udp_recv_data[15:8], udp_recv_data[23:16], udp_recv_data[31:24]};
assign crc_error = crc_match ^ recv_udp_frame_last;
always @(posedge clk or posedge reset) begin
if(reset)begin
cnt <=0;
parse_state <= 0;
crc32_recv<=0;
crc_match =1'b0;
payload_remain<=0;
recv_udp_frame_last <=0;
crc32_calc <= 32'hFFFFFFFF;
end
else begin
case (parse_state)
P_IDLE : begin
crc32_calc <= 32'hFFFFFFFF;
recv_udp_frame_last <=1'b0;
crc_match =1'b0;
if (udp_recv_data_tvalid) begin
payload_remain <= udp_recv_data_reorder[15:0];
data_fifo_din <=udp_recv_data_reorder;//存数据,跳到PDATA的时候就存成功了。
data_fifo_wren <=1'b1;
parse_state <= P_DATA;
end
end
P_DATA : begin
data_fifo_wren <=1'b0;
if (udp_recv_data_tvalid) begin
if(payload_remain == 0) begin //判断余量为0的时候的tvalid，crc_rev数据就到了。
parse_state <= P_IDLE;
crc32_recv <= udp_recv_data_reorder;
recv_udp_frame_last <=1'b1; //收到完整一帧
data_fifo_rden <= 1'b1;
if(crc32_calc == udp_recv_data_reorder)
crc_match =1'b1;
else
crc_match =1'b0;
end
else begin
data_reg <= udp_recv_data_reorder;
data_fifo_din <=udp_recv_data_reorder; //存数据,判断payload_remain == 0 ，payload就完整存进去了。
data_fifo_wren <=1'b1;
crc32_calc <= calc_crc32(udp_recv_data_reorder,crc32_calc);
payload_remain <= payload_remain -4;
end
end
end
endcase
end
end
fifo_generator_0 data_cache_fifo (
.clk (clk), // 时钟
.srst (data_fifo_rst), // 同步复位
.din (data_fifo_din), // 写入数据
.wr_en (data_fifo_wren), // 写使能
.rd_en (data_fifo_rden), // 读使能
.dout (data_fifo_dout), // 读出数据
.full (data_fifo_full), // 满标志
.empty (data_fifo_empty) // 空标志
);
//处理状态机
always @(posedge clk or posedge reset) begin
if(reset)begin
data_fifo_rden <= 0;
deal_state <=0;
deal_busy <=0;
TOE_SFP_ID <=0;
TOE_RW_FLAG <=0;
TOE_ADDR <= 0;
TOE_DATA <= 0;
header_reg <=0;
TOE_reg_wren <= 0;
TOE_reg_rden <= 0;
TOE_reg_din <= 0;
state_report_en <= 0;
end
else begin
case(deal_state)
D_IDLE : begin
TOE_reg_wren <= 0;
TOE_reg_rden <= 0;
TOE_reg_din <= 0;
if(recv_udp_frame_last)begin //last拉高的同时 ，也把data_fifo_rden拉高了
deal_busy <= 1'b1;
data_fifo_rden <= 1; // 这个拉高其实没用。如果这时候拉高，下个时钟数据处来，下下个时钟才能触发。所以这个时钟数据就要出来。
deal_state <= D_HEAD;
end
end
D_HEAD :begin //判断是头的类型，执行对应操作
header_reg <= data_fifo_dout[31:16]; // Header高字节 data_fifo_dout出来的操作，和被赋值的操作是同时进行的，默认赋值前一个数。
if( data_fifo_dout[31:16]== HDR_TOE )begin
deal_state<= D_TOE_1;
data_fifo_rden <= 1;
end
else if(data_fifo_dout[31:16] == HDR_CTRL)begin
deal_state <= D_CTRL;
data_fifo_rden <= 0; //如果现在拉低了，
end
else
deal_state <= D_IDLE;
end
D_TOE_1 :begin
TOE_reg_wren <= 0;
TOE_reg_rden <= 0;
TOE_reg_din <= 0; //TOE控制清除。
TOE_SFP_ID <= data_fifo_dout[23:20]; //TOE是64比特的数据，此时获得的是高32bit
TOE_RW_FLAG <= data_fifo_dout[16] ;
TOE_ADDR <= data_fifo_dout[15:0] ; //虽然是32比特的寄存器，但地址就是16位。
deal_state <= D_TOE_2;
data_fifo_rden <= 1;
end
D_TOE_2 : begin
TOE_DATA <= data_fifo_dout;
deal_state <= D_EXE;
data_fifo_rden <= 0;
end
D_EXE : begin
if(header_reg == HDR_TOE)begin
//开始TOE命令处理
if(TOE_RW_FLAG) TOE_reg_rden <= 1'b1;
else TOE_reg_wren <= 1'b1;
TOE_reg_din <= {TOE_SFP_ID[1:0],TOE_ADDR,TOE_DATA};
//处理结束
if(data_fifo_empty) begin deal_state <=D_IDLE; deal_busy = 1'b0; end
else begin deal_state <= D_TOE_1; data_fifo_rden <= 1; end
end
end
D_CTRL : begin
if(data_fifo_dout ==32'h1000_0001)begin
state_report_en <= 1;
end
else if (data_fifo_dout ==32'h1000_0000)begin
state_report_en <= 0;
end
else begin
state_report_en <= 0;
end
deal_busy = 1'b0;
deal_state <= D_IDLE;
end
endcase
end
end
//CRC32计算函数（生成多项式G(x) = x^32 + x^26 + x^23 + x^22 + x^16 + x^12 + x^11 + x^10 + x^8 + x^7 + x^5 + x^4 + x^2 + x + 1）初始值0xffffffff。
function [31:0] calc_crc32;
input [31:0] data;
input [31:0] crc;
reg [31:0] new_crc;
integer i;
localparam [31:0] POLY = 32'h04C11DB7;
begin
new_crc = crc ^ data;
for (i = 0; i < 32; i = i + 1) begin
if (new_crc[31]) begin
new_crc = (new_crc << 1) ^ POLY;
end else begin
new_crc = new_crc << 1;
end
end
calc_crc32 = new_crc;
end
endfunction
// 1 second timer
always@(posedge clk)
if(reset)
second_timer <= 'b0;
else if((second_timer < 28'd125 - 1) && state_report_en) //状态上报开启，秒计数器才开始工作 实际为：28'd125000000
second_timer <= second_timer + 1'b1;
else
second_timer <= 28'd0;
always@(posedge clk)
if(reset)
pulse_second <= 1'b0;
else if( (second_timer >28'd125 - 1 -16))begin
pulse_second <= 1'b1;
end
else
pulse_second <= 1'b0;
endmodule