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[/] [gigabit_udp_mac/] [trunk/] [LAN/] [UDP_KED/] [ARP_RX.vhd] - Blame information for rev 2

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1 2 boa_a_m 
--****************************************************************************************
2 
library IEEE;
3 
use IEEE.STD_LOGIC_1164.all;
4 
use IEEE.NUMERIC_STD.all;
5 
use IEEE.std_logic_unsigned.all;
6 
 
7 
library work;
8 
use work.signal_Package.all;
9 
 
10 
entity ARP_RX is
11 
generic (
12 
                        g_TIME_OUT_LOOKUP_TABLE_ARP                     : std_logic_vector(31 downto 0):= x"9502F900" --20S
13 
                        );
14 
  port (
15 
 
16 
    -- system signals
17 
    i_rx_clk             : in  std_logic;
18 
    i_tx_clk             : in  std_logic;
19 
    i_reset              : in  std_logic;
20 
    i_our_ip_addr        : in  std_logic_vector (31 downto 0);
21 
 
22 
        -- MAC layer RX inputs
23 
    i_mac_data_in        : in  std_logic_vector (7 downto 0);
24 
    i_mac_data_in_valid  : in  std_logic;
25 
    i_mac_data_in_last   : in  std_logic;
26 
 
27 
        -- Outputs to ARP
28 
        o_ip_addr0            : out std_logic_vector(31 downto 0);
29 
        o_mac_addr0           : out std_logic_vector(47 downto 0);
30 
        o_addr_valid0         : out std_logic;
31 
        o_pc_reply            : out std_logic;
32 
        o_pc_req              : out std_logic;
33 
 
34 
        -- Error Out
35 
        o_arp_rx_err_out      : out std_logic_vector (3 downto 0)
36 
    );
37 
end ARP_RX;
38 
 
39 
architecture Behavioral of ARP_RX is
40 
 
41 
--=========================== ARP Lookup Table =========================================
42 
component ARP_Lookup_table is
43 
generic (
44 
                        g_TIME_OUT_LOOKUP_TABLE_ARP                     : std_logic_vector(31 downto 0):= x"9502F900" --20S
45 
                        );
46 
port (
47 
 
48 
    -- system signals
49 
    i_rx_clk              : in  std_logic;
50 
    i_tx_clk              : in  std_logic;
51 
    i_reset               : in  std_logic;
52 
 
53 
         -- Data in
54 
         i_mac_addr_in         : in  std_logic_vector(47 downto 0);
55 
         i_ip_addr_in          : in  std_logic_vector(31 downto 0);
56 
         i_addr_valid_in       : in  std_logic;
57 
 
58 
         i_request_in          : in  std_logic;
59 
         i_reqly_in            : in  std_logic;
60 
         i_trans_data_in       : in  std_logic;
61 
 
62 
         -- Data out
63 
         o_mac_addr_out        : out  std_logic_vector(47 downto 0);
64 
         o_ip_addr_out         : out  std_logic_vector(31 downto 0);
65 
         o_addr_valid_out      : out  std_logic;
66 
 
67 
         o_request_out         : out  std_logic;
68 
         o_reply_out           : out  std_logic
69 
 
70 
         );
71 
end component;
72 
--======================================================================================
73 
--================================= Constant ===========================================================
74 
--Generate Block Conditional Constants
75 
constant c_GENERATE_PING_MODULE             : boolean  := true;                                  --if Ping Block is not Used,Value is False
76 
constant c_GENERATE_ARP_MODULE              : boolean  := true;                                  --if ARP  Block is not Used,Value is False
77 
constant c_DEFAULT_DST_MAC_ADDR             : std_logic_vector (47 downto 0) := x"F46D04962225"; --if ARP Block is not Used,Copy PC MAC Address to This Value
78 
 
79 
 
80 
--Application Layer Data Length
81 
constant c_PACKET_LENGTH                    : std_logic_vector (15 downto 0):= x"05c0";          --1472 (Maximum Application Layer Packet Length)
82 
constant c_udp_tx_src_ip                    : std_logic_vector (31 downto 0):= x"C0A86403";      --192.168.100.3(FPGA IP Adress)
83 
constant c_udp_tx_dst_ip                    : std_logic_vector (31 downto 0):= x"C0A86402";      --192.168.100.2(PC IP Address)
84 
constant c_udp_tx_protocol                  : std_logic_vector (7 downto 0) := x"11";            --UDP Protocol
85 
constant c_udp_tx_src_mac                   : std_logic_vector (47 downto 0):= x"112233445566";  --FPGA MAC Address
86 
constant c_udp_tx_checksum                  : std_logic_vector (15 downto 0):= x"0000";          --UDP Checksum(Value For This Constant is not Importanat)
87 
constant c_udp_tx_src_port                  : std_logic_vector (15 downto 0):= x"0401";          --UDP Src Port(Value For This Constant is not Importanat)
88 
constant c_udp_tx_dst_port                  : std_logic_vector (15 downto 0):= x"0FF5";          --UDP Dst Port(Value For This Constant is not Importanat)
89 
 
90 
 
91 
--ARP Constants
92 
constant c_TIME_OUT_LOOKUP_TABLE_ARP        : std_logic_vector (31 downto 0) := x"9502F900";     --20S(Value/125MHz = 20 )
93 
constant c_TIME_OUT_WAIT_FOR_ARP_REPLY      : std_logic_vector (31 downto 0) := x"07735940";     --1S    (Value/125MHz = 1 )
94 
constant c_RE_SEND_ARP_REQUEST              : std_logic_vector (3 downto 0)  := x"A";            --10
95 
 
96 
 
97 
--IP Constants
98 
constant c_IP_TTL                           : std_logic_vector (7 downto 0)  := x"80";           -- IP Packet Time to live
99 
constant c_IP_BC_ADDR                       : std_logic_vector (31 downto 0) := x"ffffffff";     -- Broadcast IP  Address
100 
constant c_MAC_BC_ADDR                      : std_logic_vector (47 downto 0) := x"ffffffffffff"; -- Broadcast MAC Address
101 
--======================================================================================================
102 
 
103 
 
104 
 
105 
 
106 
--============================= Top Signals ============================================================
107 
 
108 
--signal   s_udp_tx_data_len      : std_logic_vector (15 downto 0):= c_PACKET_LENGTH;  --1472 (Maximum Application Layer Packet Length)
109 
--signal        s_udp_tx_start         : std_logic:='0';
110 
--signal        s_udp_tx_ready         : std_logic;
111 
--signal   s_udp_tx_din          : std_logic_vector (7 downto 0);
112 
--
113 
--signal        s_udp_rx_dout          : std_logic_vector(7 downto 0);
114 
--signal        s_udp_rx_dout_rdy      : std_logic;
115 
--signal        s_udp_rx_dout_last     : std_logic;
116 
--
117 
--signal        s_udp_rx_src_ip        : std_logic_vector(31 downto 0);
118 
--signal   s_udp_rx_src_port      : std_logic_vector(15 downto 0);
119 
--signal   s_udp_rx_dst_port      : std_logic_vector(15 downto 0);
120 
--signal   s_udp_rx_data_len      : std_logic_vector(15 downto 0);
121 
--signal        s_udp_rx_err_out_top          : std_logic_vector(3 downto 0);
122 
--signal        s_udp_tx_err_out_top       : std_logic_vector(3 downto 0);
123 
--signal        s_arp_rx_err_out_top   : std_logic_vector(3 downto 0);
124 
--signal   s_ip_rx_dst_ip_top         : std_logic_vector(31 downto 0);
125 
--signal   s_ip_rx_err_out_top        : std_logic_vector (3 downto 0);
126 
--signal   s_ip_tx_err_out_top        : std_logic_vector (3 downto 0);
127 
--
128 
--
129 
--signal   s_rx_clk_out           : std_logic;
130 
--signal   s_buff_rx_clk_out      : std_logic;
131 
--signal   s_tx_clk_out           : std_logic;
132 
--signal   s_buff_tx_clk_out      : std_logic;
133 
--signal   s_clk_125              : std_logic;
134 
--signal   s_clk_100              : std_logic;
135 
--signal   s_clk_m                : std_logic;
136 
--
137 
----chip scope
138 
--signal   s_control              : std_logic_vector (35 downto 0);
139 
--signal   s_data_log             : std_logic_vector (15 downto 0);
140 
--
141 
--
142 
----for transmit data
143 
--signal   s_data_test_val        : std_logic:='0';
144 
--signal   s_data_test_last       : std_logic:='0';
145 
--signal   s_data_test            : std_logic_vector (7 downto 0):=(others=>'0');
146 
--signal   s_cnt2                 : std_logic_vector (15 downto 0):=(others=>'0');
147 
--signal   s_global_reset         : std_logic:='1';
148 
--
149 
--
150 
--
151 
--signal   s_gmii_txd           : std_logic_vector(7 downto 0);
152 
--signal   s_gmii_tx_en         : std_logic;
153 
--signal   s_gmii_tx_er         : std_logic;
154 
--======================================================================================================
155 
 
156 
 
157 
 
158 
 
159 
 
160 
 
161 
--===================== Reset_gen Signals ==============================================================
162 
signal   s_cnt_rst     : std_logic_vector(15 downto 0):=(others=>'0');
163 
--======================================================================================================
164 
 
165 
 
166 
 
167 
 
168 
 
169 
 
170 
--================================ Ethernet 1g Signals =================================================
171 
signal   s_gtx_clk                :  std_logic;
172 
signal   s_tx_clk                 :  std_logic;
173 
signal   s_rx_clk                 :  std_logic;
174 
signal   s_rstn                   :  std_logic;
175 
signal   s_rx_reset             :  std_logic;
176 
signal   s_tx_reset             :  std_logic;
177 
 
178 
 
179 
--mac to gmii_if signals
180 
signal   s_mac_gmii_rxd           :  std_logic_vector(7 downto 0);
181 
signal   s_mac_gmii_rx_dv         :  std_logic;
182 
signal   s_mac_gmii_rx_er         :  std_logic;
183 
 
184 
signal   s_mac_gmii_txd           :  std_logic_vector(7 downto 0);
185 
signal   s_mac_gmii_tx_en         :  std_logic;
186 
signal   s_mac_gmii_tx_er         :  std_logic;
187 
 
188 
 
189 
 
190 
--ip to mac signals
191 
signal   s_mac_tx_tready        :  std_logic;
192 
signal  s_mac_tx_tdata         :  std_logic_vector(7 downto 0);
193 
signal   s_mac_tx_tvalid        :  std_logic;
194 
signal   s_mac_tx_tlast         :  std_logic;
195 
 
196 
signal   s_mac_rx_tdata         :  std_logic_vector(7 downto 0);
197 
signal   s_mac_rx_tvalid        :  std_logic;
198 
signal   s_mac_rx_tlast         :  std_logic;
199 
--======================================================================================================
200 
 
201 
 
202 
 
203 
 
204 
 
205 
 
206 
 
207 
 
208 
 
209 
 
210 
--================================ UDP Signals =========================================================
211 
    -------- for transfer Rx data from IP to UDP layer----------------
212 
        signal s_ip_rx_dout           :  std_logic_vector(7 downto 0);
213 
        signal s_ip_rx_dout_rdy       :  std_logic;
214 
        signal s_ip_rx_dout_last      :  std_logic;
215 
 
216 
        -------- for transfer Rx status data from IP to UDP layer---------
217 
        signal s_ip_rx_src_ip         :  std_logic_vector(31 downto 0);
218 
    signal s_ip_rx_dst_ip         :  std_logic_vector(31 downto 0);
219 
    signal s_ip_rx_data_len       :  std_logic_vector(15 downto 0);
220 
    signal s_ip_rx_protocol       :  std_logic_vector(7 downto 0);
221 
    signal s_ip_rx_broadcast      :  std_logic;
222 
    signal s_ip_rx_err_out_udp        :  std_logic_vector (3 downto 0);
223 
    signal s_ip_tx_err_out_udp        :  std_logic_vector (3 downto 0);
224 
    signal s_arp_rx_err_out_udp       :  std_logic_vector (3 downto 0);
225 
 
226 
        -------- for transfer Tx data from UDP to IP layer---------------
227 
        signal s_ip_tx_start          :  std_logic;
228 
        signal s_ip_tx_rdy            :  std_logic;
229 
        signal s_ip_tx_din                :  std_logic_vector(7 downto 0);
230 
 
231 
        -------- for transfer Tx header data from UDP to IP layer--------
232 
        signal s_ip_tx_src_ip         :  std_logic_vector(31 downto 0);
233 
        signal s_ip_tx_dst_ip         :  std_logic_vector(31 downto 0);
234 
        signal s_ip_tx_src_mac        :  std_logic_vector(47 downto 0);
235 
        signal s_ip_tx_data_len       :  std_logic_vector(15 downto 0);
236 
        signal s_ip_tx_protocol       :  std_logic_vector(7 downto 0);
237 
        -----------------------------------------------------------------
238 
--======================================================================================================
239 
 
240 
 
241 
 
242 
 
243 
 
244 
 
245 
 
246 
 
247 
 
248 
 
249 
--============================= IP Signals =============================================================
250 
  signal s_ip_mac_tx_tvalid    : std_logic;
251 
  signal s_ip_mac_tx_tlast     : std_logic;
252 
  signal s_ip_mac_tx_tdata     : std_logic_vector(7 downto 0);
253 
  signal s_ip_mac_tx_req       : std_logic;
254 
  signal s_ip_mac_tx_granted   : std_logic;
255 
 
256 
  signal s_arp_mac_tx_tvalid   : std_logic;
257 
  signal s_arp_mac_tx_tlast    : std_logic;
258 
  signal s_arp_mac_tx_tdata    : std_logic_vector(7 downto 0);
259 
  signal s_arp_mac_tx_req      : std_logic;
260 
  signal s_arp_mac_tx_granted  : std_logic;
261 
 
262 
  signal s_ping_mac_tx_tvalid   : std_logic;
263 
  signal s_ping_mac_tx_tlast    : std_logic;
264 
  signal s_ping_mac_tx_tdata    : std_logic_vector(7 downto 0);
265 
  signal s_ping_mac_tx_req      : std_logic;
266 
  signal s_ping_mac_tx_granted  : std_logic;
267 
 
268 
  signal s_lookup_req          : std_logic;
269 
  signal s_lookup_ip           : std_logic_vector(31 downto 0);
270 
  signal s_lookup_mac_addr     : std_logic_vector(47 downto 0);
271 
  signal s_lookup_mac_got      : std_logic;
272 
  signal s_lookup_mac_err      : std_logic;
273 
 
274 
 
275 
 
276 
  signal s_no_ping_packet      : std_logic;
277 
  signal s_ip_rx_err_out            : std_logic_vector(3 downto 0);
278 
  --======================================================================================================
279 
 
280 
 
281 
 
282 
 
283 
 
284 
 
285 
 
286 
 
287 
 
288 
 
289 
 
290 
 
291 
  --============================= IP4_TX Signals ==========================================================
292 
  type t_tx_ip_state_type   is (IDLE,WAIT_MAC_ADDR,WAIT_CHN,SEND_DATA);
293 
  type t_crc_state_type  is (IDLE, TOT_LEN, ID, FLAGS, TTL, CKS, SAH, SAL, DAH, DAL, ADDOVF, FINAL, WAIT_END);
294 
  signal st_crc_state     : t_crc_state_type:=IDLE;
295 
  signal s_tx_hdr_cks    : std_logic_vector (23 downto 0):=(others=>'0');
296 
  signal s_cal_cheksum   : std_logic:='0';
297 
 
298 
 
299 
  signal st_tx_ip_state      : t_tx_ip_state_type:=IDLE;
300 
  signal s_cnt_ip_tx      : std_logic_vector (15 downto 0):=(others=>'0');
301 
  signal s_dst_mac_addr  : std_logic_vector (47 downto 0); -- arp block updats this signal
302 
  signal s_total_length  : std_logic_vector (15 downto 0); -- s_total_length is i_data_length+20(ip header)
303 
 
304 
  signal s_ip_header     : std_logic_vector (7 downto 0):=(others=>'0');
305 
  --========================================================================================================
306 
 
307 
 
308 
 
309 
 
310 
 
311 
 
312 
 
313 
 
314 
 
315 
 
316 
  --============================ IP4_RX  Signals============================================================
317 
  type t_rx_ip_state_type is (IDLE,ETH_H,IP_H,USER_DATA,WAIT_END);
318 
  signal st_RX_IP_STATE         : t_rx_ip_state_type:=IDLE;
319 
  signal s_cnt_ip_rx         : std_logic_vector (15 downto 0):=x"0001";
320 
 
321 
  signal s_src_ip_ip_rx         : std_logic_vector (31 downto 0):=(others=>'0');
322 
  signal s_dst_ip_ip_rx         : std_logic_vector (31 downto 0):=(others=>'0');
323 
  signal s_data_len_ip_rx       : std_logic_vector (15 downto 0):=(others=>'0');
324 
  signal s_protocol_ip_rx       : std_logic_vector (7 downto 0) :=(others=>'0');
325 
  signal s_broadcast_ip_rx      : std_logic;
326 
  --========================================================================================================
327 
 
328 
 
329 
 
330 
 
331 
 
332 
 
333 
 
334 
 
335 
 
336 
 
337 
 
338 
--==================================== ARP Signals ==========================================================
339 
type         t_arp_state_type is     (IDLE,LOOK_UP,WAIT_PC_REPLY);
340 
signal       st_ARP_STATE             : t_arp_state_type:=IDLE;
341 
signal       s_timeout_wait_reply_cnt           : std_logic_vector(31 downto 0):=(others=>'0');
342 
signal       s_error_cnt             : std_logic_vector(3 downto 0):=(others=>'0');
343 
 
344 
--ARP_TX Signals
345 
signal       s_dst_ip_addr_pc      : std_logic_vector(31 downto 0):=(others=>'0');
346 
signal       s_dst_mac_addr_pc     : std_logic_vector(47 downto 0):=(others=>'0');
347 
signal       s_dst_ip_addr_lookup  : std_logic_vector(31 downto 0):=(others=>'0');
348 
signal       s_fpga_req_tx         : std_logic:='0';
349 
signal       s_pc_req_tx           : std_logic:='0';
350 
 
351 
 
352 
--ARP_RX Signals
353 
signal       s_ip_addr0            : std_logic_vector(31 downto 0);
354 
signal       s_mac_addr0           : std_logic_vector(47 downto 0);
355 
signal       s_addr_valid0         : std_logic;
356 
signal       s_pc_reply_rx         : std_logic;
357 
signal       s_pc_req_rx           : std_logic;
358 
--===========================================================================================================
359 
 
360 
 
361 
 
362 
 
363 
 
364 
 
365 
 
366 
 
367 
 
368 
 
369 
 
370 
--=============================== ARP RX Signals ============================================================
371 
type t_rx_arp_state_type is       (IDLE,ETH_H,ARP_DATA,WAIT_END);
372 
signal st_RX_ARP_STATE             : t_rx_arp_state_type:=IDLE;
373 
signal s_cnt_arp_rx             : std_logic_vector (15 downto 0):=x"0001";
374 
 
375 
 
376 
signal s_dst_ip            : std_logic_vector (31 downto 0):=(others=>'0');
377 
signal s_operation         : std_logic_vector (15 downto 0):=(others=>'0');
378 
signal s_addr_valid        : std_logic:='0';
379 
signal s_pc_req            : std_logic:='0';
380 
signal s_pc_reply          : std_logic:='0';
381 
 
382 
 
383 
signal s_src_mac_arp_rx            : std_logic_vector (47 downto 0):=(others=>'0');
384 
signal s_src_ip_arp_rx             : std_logic_vector (31 downto 0):=(others=>'0');
385 
signal s_addr_valid_pulse   : std_logic:='0';
386 
signal s_pc_req_pulse       : std_logic:='0';
387 
signal s_pc_reply_pulse     : std_logic:='0';
388 
signal s_trans_data_pulse   : std_logic:='0';
389 
--===========================================================================================================
390 
 
391 
 
392 
 
393 
 
394 
 
395 
 
396 
 
397 
 
398 
 
399 
 
400 
 
401 
 
402 
--=================================== ARP LOOKUP_TABLE Signals ==============================================
403 
signal   s_timeout_lookup_table_cnt        : std_logic_vector(31 downto 0):=(others=>'0');
404 
 
405 
signal   s_din              : std_logic_vector(82 downto 0):=(others=>'0');
406 
signal   s_wr_en            : std_logic;
407 
signal   s_dout             : std_logic_vector(82 downto 0):=(others=>'0');
408 
signal   s_valid            : std_logic;
409 
signal   s_empty              : std_logic;
410 
signal   s_notempty           : std_logic;
411 
 
412 
 
413 
signal   s_mac_addr_out     : std_logic_vector(47 downto 0):=(others=>'0');
414 
signal   s_ip_addr_out      : std_logic_vector(31 downto 0):=(others=>'0');
415 
signal   s_addr_valid_out   : std_logic:='0';
416 
signal   s_request_out      : std_logic:='0';
417 
signal   s_reply_out        : std_logic:='0';
418 
--============================================================================================================
419 
 
420 
 
421 
 
422 
 
423 
 
424 
 
425 
 
426 
 
427 
 
428 
 
429 
 
430 
--============================ ARP TX Signals ================================================================
431 
type t_arp_tx_state_type   is (IDLE,WAIT_CHN,SEND_DATA);
432 
signal st_tx_arp_state          : t_arp_tx_state_type:=IDLE;
433 
signal s_cnt_arp_tx          : std_logic_vector (7 downto 0):=(others=>'0');
434 
signal s_arp_type          : std_logic_vector (15 downto 0):=(others=>'0');
435 
signal s_dst_ip_addr     : std_logic_vector (31 downto 0):=(others=>'0');
436 
signal s_dst_mac_addr1   : std_logic_vector (47 downto 0):=(others=>'0');
437 
signal s_dst_mac_addr2   : std_logic_vector (47 downto 0):=(others=>'0');
438 
--============================================================================================================
439 
 
440 
 
441 
 
442 
 
443 
 
444 
 
445 
 
446 
 
447 
 
448 
 
449 
 
450 
 
451 
--============================== PING Signals =================================================================
452 
--for Delayed Inputs
453 
signal   s_mac_data_in_r        : std_logic_vector (7 downto 0);
454 
signal   s_mac_data_in_valid_r  : std_logic;
455 
signal   s_mac_data_in_last_r   : std_logic;
456 
 
457 
 
458 
--Sync_fifo_ping Signals
459 
signal   s_ip_rx_in          : std_logic_vector(14 downto 0);
460 
signal   s_ip_rx_out         : std_logic_vector(14 downto 0):=(others=>'0');
461 
signal   s_mac_data_in          : std_logic_vector(7 downto 0);
462 
signal   s_mac_data_in_valid  : std_logic;
463 
signal   s_mac_data_in_last   : std_logic;
464 
signal   s_mac_data_in_last_d : std_logic;
465 
signal   s_ip_rx_err_in       : std_logic_vector(3 downto 0);
466 
signal   s_no_ping_data     : std_logic;
467 
signal   s_empty_sync_fifo    : std_logic:='0';
468 
signal   s_not_empty_sync_fifo: std_logic;
469 
 
470 
 
471 
--Data_fifo_ping Signals
472 
signal   s_rst_fifo_ping     : std_logic:='1';
473 
signal   s_wr_en_fifo_ping   : std_logic:='0';
474 
signal   s_din_fifo_ping     : std_logic_vector(7 downto 0):=(others=>'0');
475 
signal   s_rd_en_fifo_ping   : std_logic;
476 
signal   s_dout_fifo_ping    : std_logic_vector(7 downto 0);
477 
 
478 
 
479 
--Checksum Signals
480 
signal   s_checksum_data_out   : std_logic_vector(15 downto 0);
481 
signal   s_checksum_data_in    : std_logic_vector(7 downto 0);
482 
signal   s_checksum_start_calc : std_logic:='0';
483 
signal   s_checksum_stop_calc  : std_logic:='0';
484 
 
485 
 
486 
--st_PING_STATE Machine Process Signals
487 
type     t_ping_state            is (IDLE,ACQUIRE_DATA,WAIT_END,WAIT_CHN,SEND_DATA);
488 
signal   st_PING_STATE               : t_ping_state:=IDLE;
489 
signal   s_wr_cnt              : std_logic_vector(7 downto 0):=(others=>'0');
490 
signal   s_rd_cnt              : std_logic_vector(7 downto 0):=(others=>'0');
491 
signal   s_start_send          : std_logic;
492 
 
493 
 
494 
signal   s_src_mac_ping           : std_logic_vector(47 downto 0):=(others=>'0');
495 
signal   s_dst_mac_ping           : std_logic_vector(47 downto 0):=(others=>'0');
496 
signal   s_src_ip_ping            : std_logic_vector(31 downto 0):=(others=>'0');
497 
signal   s_dst_ip_ping            : std_logic_vector(31 downto 0):=(others=>'0');
498 
--=================================================================================================================
499 
 
500 
 
501 
 
502 
 
503 
 
504 
 
505 
 
506 
 
507 
 
508 
 
509 
 
510 
 
511 
--================================= Ping Checksum Calc Signals ====================================================
512 
type        t_checksum_state   is   (IDLE,CALC);
513 
signal      st_checksum_state      : t_checksum_state:=IDLE;
514 
 
515 
signal      s_flag       : std_logic:='0';
516 
signal      s_din_r      : std_logic_vector(7 downto 0);
517 
signal      s_sum        : std_logic_vector(31 downto 0):=(others=>'0');
518 
--=================================================================================================================
519 
 
520 
 
521 
 
522 
 
523 
 
524 
 
525 
 
526 
 
527 
 
528 
 
529 
 
530 
--============================ TX_Arbitior Signals =====================================================================
531 
type   t_state_type is       (IDLE,DATA_REQ,ARP_REQ,PING_REQ);
532 
signal st_STATE               : t_state_type:=IDLE;
533 
--======================================================================================================================
534 
 
535 
 
536 
 
537 
 
538 
 
539 
 
540 
 
541 
 
542 
 
543 
 
544 
 
545 
 
546 
--============================ UDP RX Signals ===========================================================================
547 
  type t_rx_udp_state_type is  (IDLE, UDP_HDR, USER_DATA, WAIT_END);
548 
  signal st_RX_UDP_STATE         : t_rx_udp_state_type:=IDLE;
549 
  signal s_cnt_udp_rx         : std_logic_vector (15 downto 0):=x"0001";
550 
 
551 
  signal s_src_ip_udp_rx  : std_logic_vector (31 downto 0):=(others=>'0');
552 
  signal s_src_port       : std_logic_vector (15 downto 0):=(others=>'0');
553 
  signal s_dst_port       : std_logic_vector (15 downto 0):=(others=>'0');
554 
  signal s_data_len_udp_rx       : std_logic_vector (15 downto 0):=(others=>'0');
555 
  signal s_err_out        : std_logic_vector (3 downto 0) :=(others=>'0');
556 
 --=======================================================================================================================
557 
 
558 
 
559 
 
560 
 
561 
 
562 
 
563 
 
564 
 
565 
 
566 
 
567 
 
568 
 --============================ UDP TX Signals =============================================================================
569 
  type t_tx_udp_state_type     is (IDLE,SEND_DATA);
570 
  signal st_tx_udp_state        : t_tx_udp_state_type:=IDLE;
571 
 
572 
  signal s_cnt_udp_tx        : std_logic_vector (15 downto 0):=(others=>'0');
573 
  signal s_ip_data_len   : std_logic_vector (15 downto 0);
574 
  signal s_udp_header      : std_logic_vector (7 downto 0):=(others=>'0');
575 
--==========================================================================================================================
576 
 
577 
 
578 
 
579 
 
580 
 
581 
 
582 
 
583 
 
584 
 
585 
 
586 
 
587 
--============================ PHY_Interface Signals =======================================================================
588 
signal s_gmii_col_reg         : std_logic;
589 
signal s_gmii_col_reg_reg     : std_logic;
590 
signal s_gmii_rx_clk          : std_logic;
591 
--==========================================================================================================================
592 
 
593 
 
594 
 
595 
 
596 
 
597 
 
598 
 
599 
 
600 
 
601 
 
602 
 
603 
--=========================== Ping_Pong Fifo Signals =======================================================================
604 
signal s_empty1              : std_logic;
605 
signal s_empty2              : std_logic;
606 
signal s_notempty1           : std_logic;
607 
signal s_notempty2           : std_logic;
608 
 
609 
 
610 
signal s_data_m              : std_logic_vector(7 downto 0);
611 
signal s_valid_m             : std_logic;
612 
signal s_last_m              : std_logic;
613 
 
614 
 
615 
signal s_wr_en_a             : std_logic:='0';
616 
signal s_din_a               : std_logic_vector(7 downto 0):=(others=>'0');
617 
signal s_rd_en_a             : std_logic;
618 
signal s_dout_a              : std_logic_vector(7 downto 0);
619 
signal s_valid_a             : std_logic;
620 
signal s_empty_a             : std_logic;
621 
 
622 
signal s_wr_en_b             : std_logic:='0';
623 
signal s_din_b               : std_logic_vector(7 downto 0):=(others=>'0');
624 
signal s_rd_en_b             : std_logic;
625 
signal s_dout_b              : std_logic_vector(7 downto 0);
626 
signal s_valid_b             : std_logic;
627 
signal s_empty_b             : std_logic;
628 
 
629 
 
630 
signal s_cnt_a               : std_logic_vector(15 downto 0):=(others=>'0');
631 
signal s_cnt_b               : std_logic_vector(15 downto 0):=(others=>'0');
632 
signal s_rd_cnt_a            : std_logic_vector(15 downto 0):=(others=>'0');
633 
signal s_rd_cnt_b            : std_logic_vector(15 downto 0):=(others=>'0');
634 
 
635 
signal s_busy_a              : std_logic:='0';
636 
signal s_busy_b              : std_logic:='0';
637 
 
638 
signal s_last_a              : std_logic:='0';
639 
signal s_last_b              : std_logic:='0';
640 
 
641 
signal s_dout_len          : std_logic_vector(15 downto 0);
642 
 
643 
type        t_pingpong_state     is (wait_data,rd_fifo_a,rd_fifo_b);
644 
signal      st_ping_pong_state          : t_pingpong_state:=wait_data;
645 
--=========================================================================================================================
646 
 
647 
begin
648 
 
649 
--================================= Recieve ARP Data from Mac Layer ===================
650 
p_recieve_arp_data:process(i_rx_clk)
651 
begin
652 
if(rising_edge(i_rx_clk)) then
653 
if (i_reset='1') then
654 
    st_RX_ARP_STATE           <= IDLE;
655 
         s_cnt_arp_rx                   <= x"0001";
656 
 
657 
    -- to Lookup
658 
         s_src_mac_arp_rx          <= (others => '0');
659 
    s_src_ip_arp_rx           <= (others => '0');
660 
         s_addr_valid_pulse                     <= '0';
661 
         s_pc_req_pulse                         <= '0';
662 
         s_pc_reply_pulse                       <= '0';
663 
         s_trans_data_pulse                     <= '0';
664 
 
665 
         -- Internal Signals
666 
         s_addr_valid                           <= '0';
667 
         s_pc_req                               <= '0';
668 
         s_pc_reply                             <= '0';
669 
         s_dst_ip                               <= (others => '0');
670 
         s_operation                            <= (others => '0');
671 
 
672 
        --error status
673 
         o_arp_rx_err_out               <= (others => '0');
674 
 
675 
else
676 
 
677 
         s_addr_valid_pulse             <= '0';
678 
         s_pc_req_pulse                 <= '0';
679 
         s_pc_reply_pulse               <= '0';
680 
         s_trans_data_pulse             <= '0';
681 
 
682 
        CASE st_RX_ARP_STATE IS
683 
      --************************************************************************************************************************************
684 
          WHEN IDLE =>
685 
 
686 
               s_cnt_arp_rx           <= x"0001";
687 
                   --error status
688 
                   o_arp_rx_err_out             <= (others => '0');
689 
                   if ( i_mac_data_in_valid = '1') then
690 
                            s_cnt_arp_rx                <= s_cnt_arp_rx+1;
691 
                                 st_RX_ARP_STATE        <= ETH_H;
692 
                   end if;
693 
 
694 
       --************************************************************************************************************************************
695 
    WHEN ETH_H =>
696 
               if ( i_mac_data_in_valid = '1') then
697 
                        s_cnt_arp_rx            <= s_cnt_arp_rx+1;
698 
                            ---------- Checking Frame Type ------------------------------
699 
             if(s_cnt_arp_rx= 13) then
700 
                if i_mac_data_in /= x"08" then
701 
                   o_arp_rx_err_out     <= x"1";
702 
                                       st_RX_ARP_STATE     <= WAIT_END;
703 
                end if;
704 
                            end if;
705 
            if(s_cnt_arp_rx= 14) then
706 
               st_RX_ARP_STATE                  <= ARP_DATA;
707 
                                   if i_mac_data_in /= x"06" then
708 
                                      o_arp_rx_err_out          <= x"1";
709 
                                      st_RX_ARP_STATE      <= WAIT_END;
710 
               end if;
711 
                           end if;
712 
                                ------------------------------------------------------
713 
            if ( i_mac_data_in_last = '1') then
714 
                 s_cnt_arp_rx           <= x"0001";
715 
                                          --error status
716 
                                          o_arp_rx_err_out              <= x"2";
717 
                                     st_RX_ARP_STATE       <= IDLE;
718 
            end if;
719 
                            ------------------------------------------------------
720 
         end if;
721 
 
722 
       --************************************************************************************************************************************
723 
       WHEN ARP_DATA =>
724 
 
725 
                    if (i_mac_data_in_valid = '1') then
726 
                       s_cnt_arp_rx                             <= s_cnt_arp_rx+1;
727 
                                 ------------- Checking Hardware Type -----------------------------------------------------------------
728 
                                 if(s_cnt_arp_rx= 15) then
729 
                               if i_mac_data_in /= x"00" then
730 
                   o_arp_rx_err_out     <= x"3";
731 
                                            st_RX_ARP_STATE     <= WAIT_END;
732 
                end if;
733 
                            end if;
734 
                                 if(s_cnt_arp_rx= 16) then
735 
                               if i_mac_data_in /= x"01" then
736 
                   o_arp_rx_err_out     <= x"3";
737 
                                            st_RX_ARP_STATE     <= WAIT_END;
738 
                end if;
739 
                            end if;
740 
 
741 
                                ------------- Checking Protocol Type -----------------------------------------------------------------
742 
                                 if(s_cnt_arp_rx= 17) then
743 
                               if i_mac_data_in /= x"08" then
744 
                   o_arp_rx_err_out     <= x"4";
745 
                                            st_RX_ARP_STATE     <= WAIT_END;
746 
                end if;
747 
                            end if;
748 
                                 if(s_cnt_arp_rx= 18) then
749 
                               if i_mac_data_in /= x"00" then
750 
                   o_arp_rx_err_out     <= x"4";
751 
                                            st_RX_ARP_STATE     <= WAIT_END;
752 
                end if;
753 
                            end if;
754 
                                ------------- Checking Address Length -----------------------------------------------------------------
755 
                                if(s_cnt_arp_rx= 19) then
756 
                               if i_mac_data_in /= x"06" then
757 
                   o_arp_rx_err_out     <= x"5";
758 
                                            st_RX_ARP_STATE     <= WAIT_END;
759 
                end if;
760 
                           end if;
761 
                                if(s_cnt_arp_rx= 20) then
762 
                               if i_mac_data_in /= x"04" then
763 
                   o_arp_rx_err_out     <= x"5";
764 
                                            st_RX_ARP_STATE     <= WAIT_END;
765 
                end if;
766 
                           end if;
767 
 
768 
                            ------------- Checking & Loading Operation ----------------------------------------------------------
769 
           if(s_cnt_arp_rx=21) then
770 
                                   s_operation (15 downto 8)    <= i_mac_data_in;
771 
                          end if;
772 
                          if(s_cnt_arp_rx=22) then
773 
               s_operation (7 downto 0)  <= i_mac_data_in;
774 
                                   s_pc_req                                             <= '0';
775 
                                   s_pc_reply                                           <= '0';
776 
 
777 
                                        if ((s_operation (15 downto 8) & i_mac_data_in) = x"0001") then
778 
                                            s_pc_req                            <= '1';
779 
               elsif ((s_operation (15 downto 8) & i_mac_data_in) = x"0002") then
780 
                                            s_pc_reply                          <= '1';
781 
                                        else
782 
                                       o_arp_rx_err_out <= x"6";
783 
                                                 st_RX_ARP_STATE        <= WAIT_END;
784 
                                   end if;
785 
                          end if;
786 
                           ------------- Loading Source MAC Address ----------------------------------------------------------------------
787 
            if(s_cnt_arp_rx=23) then
788 
                                   s_src_mac_arp_rx(47 downto 40)       <= i_mac_data_in;
789 
                                end if;
790 
            if(s_cnt_arp_rx=24) then
791 
                                   s_src_mac_arp_rx(39 downto 32)       <= i_mac_data_in;
792 
                                end if;
793 
            if(s_cnt_arp_rx=25) then
794 
                                   s_src_mac_arp_rx(31 downto 24)       <= i_mac_data_in;
795 
                                end if;
796 
            if(s_cnt_arp_rx=26) then
797 
                                   s_src_mac_arp_rx(23 downto 16)       <= i_mac_data_in;
798 
                                end if;
799 
                                if(s_cnt_arp_rx=27) then
800 
                                   s_src_mac_arp_rx(15 downto 8)        <= i_mac_data_in;
801 
                                end if;
802 
            if(s_cnt_arp_rx=28) then
803 
                                   s_src_mac_arp_rx(7 downto 0)          <= i_mac_data_in;
804 
                                end if;
805 
            ------------- Loading Source IP Address ----------------------------------------------------------------------
806 
            if(s_cnt_arp_rx=29) then
807 
                                   s_src_ip_arp_rx(31 downto 24)        <= i_mac_data_in;
808 
                                end if;
809 
            if(s_cnt_arp_rx=30) then
810 
                                   s_src_ip_arp_rx(23 downto 16)        <= i_mac_data_in;
811 
                                end if;
812 
            if(s_cnt_arp_rx=31) then
813 
                                   s_src_ip_arp_rx(15 downto 8)         <= i_mac_data_in;
814 
                                end if;
815 
            if(s_cnt_arp_rx=32) then
816 
                                   s_src_ip_arp_rx(7 downto 0)           <= i_mac_data_in;
817 
                                   s_addr_valid                                         <= '1';
818 
                                   if ((s_src_ip_arp_rx(31 downto 8) & i_mac_data_in) = c_IP_BC_ADDR) then
819 
                                             s_addr_valid                               <= '0';
820 
                                             o_arp_rx_err_out                           <= x"7";
821 
                                             st_RX_ARP_STATE            <= WAIT_END;
822 
                                        end if;
823 
                                end if;
824 
                                ------------- Loading Dst IP Address ----------------------------------------------------------------------
825 
            if(s_cnt_arp_rx=39) then
826 
                                   s_dst_ip(31 downto 24)                               <= i_mac_data_in;
827 
                                end if;
828 
            if(s_cnt_arp_rx=40) then
829 
                                   s_dst_ip(23 downto 16)                               <= i_mac_data_in;
830 
                                end if;
831 
            if(s_cnt_arp_rx=41) then
832 
                                   s_dst_ip(15 downto 8)                                <= i_mac_data_in;
833 
                                end if;
834 
            if(s_cnt_arp_rx=42) then -- End of ARP Packet
835 
                                   s_dst_ip(7 downto 0)                                  <= i_mac_data_in;
836 
                                        st_RX_ARP_STATE                 <= WAIT_END;
837 
                                        -- transmit to Lookup
838 
                                        s_trans_data_pulse                              <= '1';
839 
                                   s_addr_valid_pulse                                   <= s_addr_valid;
840 
                                        if ((s_dst_ip(31 downto 8) & i_mac_data_in) = i_our_ip_addr) then
841 
                                             s_pc_req_pulse                             <= s_pc_req;
842 
                                             s_pc_reply_pulse                           <= s_pc_reply;
843 
                                   end if;
844 
 
845 
                           end if;
846 
 
847 
                                ------------------------------------------------
848 
                                if (i_mac_data_in_last = '1') then
849 
                  s_cnt_arp_rx                                          <= x"0001";
850 
                                                st_RX_ARP_STATE                                 <= IDLE;
851 
                                                if (s_cnt_arp_rx < 42) then
852 
                                               o_arp_rx_err_out                 <= x"2";
853 
                  end if;
854 
            end if;
855 
                                ------------------------------------------------
856 
 
857 
                        end if;
858 
 
859 
          --=============================================
860 
                WHEN WAIT_END =>
861 
           if ( i_mac_data_in_valid = '1') then
862 
              if ( i_mac_data_in_last = '1') then
863 
                   s_cnt_arp_rx                                 <= x"0001";
864 
                                       --error status
865 
                                       o_arp_rx_err_out                         <= x"0";
866 
                                  st_RX_ARP_STATE                       <= IDLE;
867 
              end if;
868 
                   end if;
869 
 
870 
                  END CASE;
871 
          --=============================================
872 
end if;
873 
end if;
874 
end process p_recieve_arp_data;
875 
--================================================================================================
876 
 
877 
--===================== ARP_Lookup_table ==========================================================
878 
inst_arp_lookup_table : ARP_Lookup_table
879 
generic map(
880 
                        g_TIME_OUT_LOOKUP_TABLE_ARP     =>      g_TIME_OUT_LOOKUP_TABLE_ARP
881 
                        )
882 
port map (
883 
   -- system signals
884 
    i_rx_clk              => i_rx_clk,
885 
    i_tx_clk              => i_tx_clk,
886 
    i_reset               => i_reset,
887 
 
888 
         -- Data in
889 
         i_mac_addr_in         => s_src_mac_arp_rx,
890 
         i_ip_addr_in          => s_src_ip_arp_rx,
891 
         i_addr_valid_in       => s_addr_valid_pulse,
892 
         i_request_in          => s_pc_req_pulse,
893 
         i_reqly_in            => s_pc_reply_pulse,
894 
         i_trans_data_in       => s_trans_data_pulse,
895 
 
896 
         -- Data out
897 
         o_mac_addr_out        => o_mac_addr0,
898 
         o_ip_addr_out         => o_ip_addr0,
899 
         o_addr_valid_out      => o_addr_valid0,
900 
 
901 
         o_request_out         => o_pc_req,
902 
         o_reply_out           => o_pc_reply
903 
);
904 
--================================================================================================
905 
 
906 
  end Behavioral;

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