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[/] [spacewiresystemc/] [trunk/] [rtl/] [RTL_VB/] [tx_spw.v] - Blame information for rev 6

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1 5 redbear 
//+FHDR------------------------------------------------------------------------
2 
//Copyright (c) 2013 Latin Group American Integhrated Circuit, Inc. All rights reserved
3 
//GLADIC Open Source RTL
4 
//-----------------------------------------------------------------------------
5 
//FILE NAME      :
6 
//DEPARTMENT     : IC Design / Verification
7 
//AUTHOR         : Felipe Fernandes da Costa
8 
//AUTHOR’S EMAIL :
9 
//-----------------------------------------------------------------------------
10 
//RELEASE HISTORY
11 
//VERSION DATE AUTHOR DESCRIPTION
12 
//1.0 YYYY-MM-DD name
13 
//-----------------------------------------------------------------------------
14 
//KEYWORDS : General file searching keywords, leave blank if none.
15 
//-----------------------------------------------------------------------------
16 
//PURPOSE  : ECSS_E_ST_50_12C_31_july_2008
17 
//-----------------------------------------------------------------------------
18 
//PARAMETERS
19 
//PARAM NAME            RANGE   : DESCRIPTION : DEFAULT : UNITS
20 
//e.g.DATA_WIDTH        [32,16] : width of the DATA : 32:
21 
//-----------------------------------------------------------------------------
22 
//REUSE ISSUES
23 
//Reset Strategy        :
24 
//Clock Domains         :
25 
//Critical Timing       :
26 
//Test Features         :
27 
//Asynchronous I/F      :
28 
//Scan Methodology      :
29 
//Instantiations        :
30 
//Synthesizable (y/n)   :
31 
//Other                 :
32 
//-FHDR------------------------------------------------------------------------
33 
 
34 
`timescale 1ns/1ns
35 
 
36 
module TX_SPW (
37 
                input pclk_tx,
38 
                //
39 
                input [8:0] data_tx_i,
40 
                input txwrite_tx,
41 
                //
42 
                input [7:0] timecode_tx_i,
43 
                input tickin_tx,
44 
                //
45 
                input enable_tx,
46 
                input send_null_tx,
47 
                input send_fct_tx,
48 
 
49 
                //
50 
                input gotfct_tx,
51 
                input send_fct_now,
52 
                //
53 
                output reg tx_dout,
54 
                output reg tx_sout,
55 
                //
56 
                output  ready_tx_data,
57 
                output  ready_tx_timecode
58 
 
59 
                );
60 
 
61 
localparam [2:0] tx_spw_start     = 3'b000,
62 
                 tx_spw_null      = 3'b001,
63 
                 tx_spw_null_fct  = 3'b010,
64 
                 tx_spw_full      = 3'b100;
65 
 
66 
localparam [5:0] NULL     = 6'b000001,
67 
                 FCT      = 6'b000010,
68 
                 EOP      = 6'b000100,
69 
                 EEP      = 6'b001000,
70 
                 DATA     = 6'b010000,
71 
                 TIMEC    = 6'b100000;
72 
 
73 
        reg [2:0] state_tx;
74 
        reg [2:0] next_state_tx;
75 
 
76 
        reg [7:0]  null_s;
77 
        reg [3:0]  fct_s;
78 
        reg [3:0]  eop_s;
79 
        reg [3:0]  eep_s;
80 
        reg [13:0] timecode_s;
81 
 
82 
        reg [5:0]  last_type;
83 
        reg [8:0]  txdata_flagctrl_tx_last;
84 
        reg [7:0]  last_timein_control_flag_tx;
85 
 
86 
        reg first_time;
87 
 
88 
        reg enable_null;
89 
        reg enable_fct;
90 
        reg enable_n_char;
91 
        reg enable_time_code;
92 
 
93 
        reg [2:0] fct_send;
94 6 redbear 
        reg [2:0] fct_send_last;
95 5 redbear 
        reg [2:0] fct_flag;
96 6 redbear 
 
97 5 redbear 
        reg [5:0] fct_counter;
98 6 redbear 
        reg [5:0] fct_counter_last;
99 
        reg [5:0] fct_counter_receive;
100 
 
101 5 redbear 
        reg last_tx_dout;
102 
        reg last_tx_sout;
103 
 
104 
        reg [3:0] global_counter_transfer;
105 
 
106 
assign ready_tx_timecode = (enable_time_code & global_counter_transfer == 14)?1'b1:1'b0;
107 
 
108 
assign ready_tx_data     = (enable_n_char & global_counter_transfer == 4'd10  & !data_tx_i[8])?1'b1:
109 
                           (enable_n_char & global_counter_transfer == 4'd4   &  data_tx_i[8])?1'b1:1'b0;
110 
 
111 
always@(*)
112 
begin
113 
        tx_dout = 1'b0;
114 
 
115 
         if(!enable_tx)
116 
         begin
117 
                tx_dout = 1'b0;
118 
         end
119 
         else if( enable_null & first_time  & global_counter_transfer == 4'd0)
120 
         begin
121 
                tx_dout = null_s[7];
122 
         end
123 
         else if( enable_null & !first_time & last_type == NULL  & global_counter_transfer == 4'd0)
124 
         begin
125 
                tx_dout = !(null_s[6]^null_s[0]^null_s[1]);
126 
         end
127 
         else if( enable_null & !first_time & last_type == FCT   & global_counter_transfer == 4'd0)
128 
         begin
129 
                tx_dout = !(null_s[6]^fct_s[0]^fct_s[1]);
130 
         end
131 
         else if( enable_null & !first_time & last_type == EOP   & global_counter_transfer == 4'd0)
132 
         begin
133 
                tx_dout = !(null_s[6]^eop_s[0]^eop_s[1]);
134 
         end
135 
         else if( enable_null & !first_time & last_type == EEP   & global_counter_transfer == 4'd0)
136 
         begin
137 
                tx_dout = !(null_s[6]^eep_s[0]^eep_s[1]);
138 
         end
139 
         else if( enable_null & !first_time & last_type == DATA  & global_counter_transfer == 4'd0)
140 
         begin
141 
                tx_dout =  !(null_s[6]^txdata_flagctrl_tx_last[0]^txdata_flagctrl_tx_last[1]^txdata_flagctrl_tx_last[2]^txdata_flagctrl_tx_last[3]^ txdata_flagctrl_tx_last[4]^txdata_flagctrl_tx_last[5]^txdata_flagctrl_tx_last[6]^txdata_flagctrl_tx_last[7]);
142 
         end
143 
         else if( enable_null & !first_time & last_type == TIMEC & global_counter_transfer == 4'd0)
144 
         begin
145 
                tx_dout =  !(null_s[6]^last_timein_control_flag_tx[7]^last_timein_control_flag_tx[6]^last_timein_control_flag_tx[5]^last_timein_control_flag_tx[4]^last_timein_control_flag_tx[3]^last_timein_control_flag_tx[2]^last_timein_control_flag_tx[1]^last_timein_control_flag_tx[0]);
146 
         end
147 
         else if( enable_null & !first_time & global_counter_transfer == 4'd1)
148 
         begin
149 
                tx_dout = null_s[6];
150 
         end
151 
         else if( enable_null & !first_time & global_counter_transfer == 4'd2)
152 
         begin
153 
                tx_dout = null_s[5];
154 
         end
155 
         else if( enable_null & !first_time & global_counter_transfer == 4'd3)
156 
         begin
157 
                tx_dout = null_s[4];
158 
         end
159 
         else if( enable_null & !first_time & global_counter_transfer == 4'd4)
160 
         begin
161 
                tx_dout = null_s[3];
162 
         end
163 
         else if( enable_null & !first_time & global_counter_transfer == 4'd5)
164 
         begin
165 
                tx_dout = null_s[2];
166 
         end
167 
         else if( enable_null & !first_time & global_counter_transfer == 4'd6)
168 
         begin
169 
                tx_dout = null_s[1];
170 
         end
171 
         else if( enable_null & !first_time & global_counter_transfer == 4'd7)
172 
         begin
173 
                tx_dout = null_s[0];
174 
         end
175 
         else if( enable_fct  & !first_time & last_type == NULL  & global_counter_transfer == 4'd0)
176 
         begin
177 
                tx_dout = !(fct_s[2]^null_s[0]^null_s[1]);
178 
         end
179 
         else if( enable_fct  & !first_time & last_type == FCT   & global_counter_transfer == 4'd0)
180 
         begin
181 
                tx_dout = !(fct_s[2]^fct_s[0]^fct_s[1]);
182 
         end
183 
         else if( enable_fct  & !first_time & last_type == EOP   & global_counter_transfer == 4'd0)
184 
         begin
185 
                tx_dout = !(fct_s[2]^eop_s[0]^eop_s[1]);
186 
         end
187 
         else if( enable_fct  & !first_time & last_type == EEP   & global_counter_transfer == 4'd0)
188 
         begin
189 
                tx_dout = !(fct_s[2]^eep_s[0]^eep_s[1]);
190 
         end
191 
         else if ( enable_fct  & !first_time & last_type == DATA  & global_counter_transfer == 4'd0)
192 
         begin
193 
                tx_dout = !(fct_s[2]^txdata_flagctrl_tx_last[0]^txdata_flagctrl_tx_last[1]^txdata_flagctrl_tx_last[2]^txdata_flagctrl_tx_last[3]^ txdata_flagctrl_tx_last[4]^txdata_flagctrl_tx_last[5]^txdata_flagctrl_tx_last[6]^txdata_flagctrl_tx_last[7]);
194 
         end
195 
         else if( enable_fct  & !first_time & last_type == TIMEC & global_counter_transfer == 4'd0)
196 
         begin
197 
                tx_dout = !(fct_s[2]^last_timein_control_flag_tx[7]^last_timein_control_flag_tx[6]^last_timein_control_flag_tx[5]^last_timein_control_flag_tx[4]^last_timein_control_flag_tx[3]^last_timein_control_flag_tx[2]^last_timein_control_flag_tx[1]^last_timein_control_flag_tx[0]);
198 
         end
199 
         else if( enable_fct  & !first_time & global_counter_transfer == 4'd1)
200 
         begin
201 
                tx_dout = fct_s[2];
202 
         end
203 
         else if( enable_fct  & !first_time & global_counter_transfer == 4'd2)
204 
         begin
205 
                tx_dout = fct_s[1];
206 
         end
207 
         else if( enable_fct  & !first_time & global_counter_transfer == 4'd3)
208 
         begin
209 
                tx_dout = fct_s[0];
210 
         end
211 
         else if( enable_time_code & !first_time & last_type == NULL  & global_counter_transfer == 4'd0)
212 
         begin
213 
                tx_dout = !(timecode_s[12]^null_s[0]^null_s[1]);
214 
         end
215 
         else if( enable_time_code & !first_time & last_type == FCT   & global_counter_transfer == 4'd0)
216 
         begin
217 
                tx_dout = !(timecode_s[12]^fct_s[0]^fct_s[1]);
218 
         end
219 
         else if ( enable_time_code & !first_time & last_type == EOP   & global_counter_transfer == 4'd0)
220 
         begin
221 
                tx_dout = !(timecode_s[12]^eop_s[0]^eop_s[1]);
222 
         end
223 
         else if( enable_time_code & !first_time & last_type == EEP   & global_counter_transfer == 4'd0)
224 
         begin
225 
                tx_dout = !(timecode_s[12]^eep_s[0]^eep_s[1]);
226 
         end
227 
         else if( enable_time_code & !first_time & last_type == DATA  & global_counter_transfer == 4'd0)
228 
         begin
229 
                tx_dout = !(timecode_s[12]^txdata_flagctrl_tx_last[0]^txdata_flagctrl_tx_last[1]^txdata_flagctrl_tx_last[2]^txdata_flagctrl_tx_last[3]^ txdata_flagctrl_tx_last[4]^txdata_flagctrl_tx_last[5]^txdata_flagctrl_tx_last[6]^txdata_flagctrl_tx_last[7]);
230 
         end
231 
         else if( enable_time_code & !first_time & last_type == TIMEC & global_counter_transfer == 4'd0)
232 
         begin
233 
                tx_dout = !(timecode_s[12]^last_timein_control_flag_tx[7]^last_timein_control_flag_tx[6]^last_timein_control_flag_tx[5]^last_timein_control_flag_tx[4]^last_timein_control_flag_tx[3]^last_timein_control_flag_tx[2]^last_timein_control_flag_tx[1]^last_timein_control_flag_tx[0]);
234 
         end
235 
         else if( enable_time_code & !first_time & global_counter_transfer == 4'd1)
236 
         begin
237 
                tx_dout = timecode_s[12];
238 
         end
239 
         else if( enable_time_code & !first_time & global_counter_transfer == 4'd2)
240 
         begin
241 
                tx_dout = timecode_s[11];
242 
         end
243 
         else if( enable_time_code & !first_time & global_counter_transfer == 4'd3)
244 
         begin
245 
                tx_dout = timecode_s[10];
246 
         end
247 
         else if( enable_time_code & !first_time & global_counter_transfer == 4'd4)
248 
         begin
249 
                tx_dout = timecode_s[9];
250 
         end
251 
         else if( enable_time_code & !first_time & global_counter_transfer == 4'd5)
252 
         begin
253 
                tx_dout = timecode_s[8];
254 
         end
255 
         else if( enable_time_code & !first_time & global_counter_transfer == 4'd6)
256 
         begin
257 
                tx_dout = timecode_s[7];
258 
         end
259 
         else if( enable_time_code & !first_time & global_counter_transfer == 4'd7)
260 
         begin
261 
                tx_dout = timecode_s[6];
262 
         end
263 
         else if( enable_time_code & !first_time & global_counter_transfer == 4'd8)
264 
         begin
265 
                tx_dout = timecode_s[5];
266 
         end
267 
         else if( enable_time_code & !first_time & global_counter_transfer == 4'd9)
268 
         begin
269 
                tx_dout = timecode_s[4];
270 
         end
271 
         else if( enable_time_code & !first_time & global_counter_transfer == 4'd10)
272 
         begin
273 
                tx_dout = timecode_s[3];
274 
         end
275 
         else if( enable_time_code & !first_time & global_counter_transfer == 4'd11)
276 
         begin
277 
                tx_dout = timecode_s[2];
278 
         end
279 
         else if( enable_time_code & !first_time & global_counter_transfer == 4'd12)
280 
         begin
281 
                tx_dout = timecode_s[1];
282 
         end
283 
         else if( enable_time_code & !first_time & global_counter_transfer == 4'd13)
284 
         begin
285 
                tx_dout = timecode_s[0];
286 
         end
287 
         else if( enable_n_char    & !first_time & last_type == NULL  & global_counter_transfer == 4'd0)
288 
         begin
289 
                tx_dout = !(data_tx_i[8]^null_s[0]^null_s[1]);
290 
         end
291 
         else if( enable_n_char    & !first_time & last_type == FCT   & global_counter_transfer == 4'd0)
292 
         begin
293 
                tx_dout = !(data_tx_i[8]^fct_s[0]^fct_s[1]);
294 
         end
295 
         else if( enable_n_char    & !first_time & last_type == EOP   & global_counter_transfer == 4'd0)
296 
         begin
297 
                tx_dout = !(data_tx_i[8]^eop_s[0]^eop_s[1]);
298 
         end
299 
         else if( enable_n_char    & !first_time & last_type == EEP   & global_counter_transfer == 4'd0)
300 
         begin
301 
                tx_dout = !(data_tx_i[8]^eep_s[0]^eep_s[1]);
302 
         end
303 
         else if( enable_n_char    & !first_time & last_type == DATA  & global_counter_transfer == 4'd0)
304 
         begin
305 
                tx_dout = !(data_tx_i[8]^txdata_flagctrl_tx_last[0]^txdata_flagctrl_tx_last[1]^txdata_flagctrl_tx_last[2]^txdata_flagctrl_tx_last[3]^ txdata_flagctrl_tx_last[4]^txdata_flagctrl_tx_last[5]^txdata_flagctrl_tx_last[6]^txdata_flagctrl_tx_last[7]);
306 
         end
307 
         else if( enable_n_char    & !first_time & last_type == TIMEC & global_counter_transfer == 4'd0)
308 
         begin
309 
                tx_dout = !(data_tx_i[8]^last_timein_control_flag_tx[7]^last_timein_control_flag_tx[6]^last_timein_control_flag_tx[5]^last_timein_control_flag_tx[4]^last_timein_control_flag_tx[3]^last_timein_control_flag_tx[2]^last_timein_control_flag_tx[1]^last_timein_control_flag_tx[0]);
310 
         end
311 
         else if( enable_n_char    & !data_tx_i[8] & !first_time & global_counter_transfer == 4'd1)
312 
         begin
313 
                tx_dout = data_tx_i[8];
314 
         end
315 
         else if( enable_n_char    & !data_tx_i[8] & !first_time & global_counter_transfer == 4'd2)
316 
         begin
317 
                tx_dout = data_tx_i[0];
318 
         end
319 
         else if( enable_n_char    & !data_tx_i[8] & !first_time & global_counter_transfer == 4'd3)
320 
         begin
321 
                tx_dout = data_tx_i[1];
322 
         end
323 
         else if( enable_n_char    & !data_tx_i[8] & !first_time & global_counter_transfer == 4'd4)
324 
         begin
325 
                tx_dout = data_tx_i[2];
326 
         end
327 
         else if( enable_n_char    & !data_tx_i[8] & !first_time & global_counter_transfer == 4'd5)
328 
         begin
329 
                tx_dout = data_tx_i[3];
330 
         end
331 
         else if( enable_n_char    & !data_tx_i[8] & !first_time & global_counter_transfer == 4'd6)
332 
         begin
333 
                tx_dout = data_tx_i[4];
334 
         end
335 
         else if( enable_n_char    & !data_tx_i[8] & !first_time & global_counter_transfer == 4'd7)
336 
         begin
337 
                tx_dout = data_tx_i[5];
338 
         end
339 
         else if( enable_n_char    & !data_tx_i[8] & !first_time & global_counter_transfer == 4'd8)
340 
         begin
341 
                tx_dout = data_tx_i[6];
342 
         end
343 
         else if( enable_n_char    & !data_tx_i[8] & !first_time & global_counter_transfer == 4'd9)
344 
         begin
345 
                tx_dout = data_tx_i[7];
346 
         end
347 
         else if( enable_n_char    &  data_tx_i[8] & data_tx_i[1:0] == 2'b00 & !first_time & global_counter_transfer == 4'd1)
348 
         begin
349 
                tx_dout = eop_s[2];
350 
         end
351 
         else if( enable_n_char    &  data_tx_i[8] & data_tx_i[1:0] == 2'b00 & !first_time & global_counter_transfer == 4'd2)
352 
         begin
353 
                tx_dout = eop_s[1];
354 
         end
355 
         else if( enable_n_char    &  data_tx_i[8] & data_tx_i[1:0] == 2'b00 & !first_time & global_counter_transfer == 4'd3)
356 
         begin
357 
                tx_dout = eop_s[0];
358 
         end
359 
         else if( enable_n_char    &  data_tx_i[8] & data_tx_i[1:0] == 2'b01 & !first_time & global_counter_transfer == 4'd1)
360 
         begin
361 
                tx_dout = eep_s[2];
362 
         end
363 
         else if( enable_n_char    &  data_tx_i[8] & data_tx_i[1:0] == 2'b01 & !first_time & global_counter_transfer == 4'd2)
364 
         begin
365 
                tx_dout = eep_s[1];
366 
         end
367 
         else if( enable_n_char    &  data_tx_i[8] & data_tx_i[1:0] == 2'b01 & !first_time & global_counter_transfer == 4'd3)
368 
         begin
369 
                tx_dout = eep_s[0];
370 
         end
371 
end
372 
 
373 
//strobe
374 
always@(*)
375 
begin
376 
        tx_sout = 1'b0;
377 
 
378 
        if(!enable_tx)
379 
        begin
380 
                tx_sout = 1'b0;
381 
        end
382 
        else if((enable_null | enable_fct) && tx_dout == last_tx_dout)
383 
        begin
384 
                tx_sout = !last_tx_sout;
385 
        end
386 
        else if((enable_null | enable_fct) && tx_dout != last_tx_dout)
387 
        begin
388 
                tx_sout = last_tx_sout;
389 
        end
390 
end
391 
 
392 
//slots open in another side
393 6 redbear 
always@(posedge gotfct_tx or negedge enable_tx)
394 5 redbear 
begin
395 
 
396 
        if(!enable_tx)
397 
        begin
398 
                fct_counter <= {6{1'b0}};
399 
        end
400 6 redbear 
        else
401 5 redbear 
        begin
402 6 redbear 
                if(fct_counter == 6'd56)
403 
                        fct_counter <= 6'd8;
404 
                else
405 
                        fct_counter <= fct_counter + 6'd8;
406 5 redbear 
        end
407 
end
408 
 
409 
 
410 
//slots open in our side
411 
always@(posedge send_fct_now or negedge enable_tx)
412 
begin
413 
 
414 
        if(!enable_tx)
415 
        begin
416 
                fct_send <= {3{1'b1}};
417 
        end
418 
        else
419 
        begin
420 6 redbear 
 
421 
                if(fct_send == 3'd7)
422 
                begin
423 
                        fct_send <= 3'd1;
424 
                end
425 
                else
426 
                begin
427 
                        fct_send <= fct_send + 3'd1;
428 
                end
429 5 redbear 
        end
430 
 
431 
end
432 
 
433 
 
434 
always@(*)
435 
begin
436 
 
437 
        next_state_tx = state_tx;
438 
 
439 
        enable_null      = 1'b0;
440 
        enable_fct       = 1'b0;
441 
        enable_n_char    = 1'b0;
442 
        enable_time_code = 1'b0;
443 
 
444 
        case(state_tx)
445 
        tx_spw_start:
446 
        begin
447 
                if(send_null_tx && enable_tx)
448 
                begin
449 
                        if(global_counter_transfer == 4'd7)
450 
                                next_state_tx = tx_spw_null;
451 
 
452 
                        enable_null = 1'b1;
453 
                end
454 
                else
455 
                begin
456 
                        next_state_tx = tx_spw_start;
457 
                end
458 
        end
459 
        tx_spw_null:
460 
        begin
461 
                enable_null = 1'b1;
462 
 
463 
                if(global_counter_transfer == 4'd7)
464 
                begin
465 
                        if(send_null_tx && send_fct_tx && enable_tx)
466 
                                next_state_tx = tx_spw_null_fct;
467 
                        else
468 
                                next_state_tx = tx_spw_null;
469 
                end
470 
 
471 
        end
472 
        tx_spw_null_fct:
473 
        begin
474 
 
475 
                enable_null   = 1'b1;
476 
                next_state_tx = tx_spw_null_fct;
477 
 
478 6 redbear 
                if(send_fct_tx && fct_flag > 0)
479 5 redbear 
                begin
480 
                        enable_null = 1'b0;
481 
                        enable_fct = 1'b1;
482 
                end
483 
                else
484 
                begin
485 
                        enable_fct = 1'b0;
486 
 
487 
                        if(send_fct_tx && gotfct_tx)
488 
                        begin
489 
                                if(global_counter_transfer == 4'd7)
490 
                                        next_state_tx =  tx_spw_full;
491 
                        end
492 
 
493 
                end
494 
        end
495 
        tx_spw_full:
496 
        begin
497 
 
498 
                enable_null = 1'b1;
499 
 
500 6 redbear 
                if(tickin_tx & (global_counter_transfer == 4'd7 || global_counter_transfer == 4'd9 || global_counter_transfer == 4'd13 || global_counter_transfer == 4'd3))
501 5 redbear 
                begin
502 6 redbear 
                        enable_time_code = 1'b1;
503 5 redbear 
                        enable_null = 1'b0;
504 
                end
505 6 redbear 
                else if(fct_flag > 3'd0 & (global_counter_transfer == 4'd7 || global_counter_transfer == 4'd9 || global_counter_transfer == 4'd13 || global_counter_transfer == 4'd3))
506 5 redbear 
                begin
507 6 redbear 
                        enable_fct  = 1'b1;
508 5 redbear 
                        enable_null = 1'b0;
509 
                end
510 6 redbear 
                else if(txwrite_tx && fct_counter_receive > 6'd0 & (global_counter_transfer == 4'd7 || global_counter_transfer == 4'd9 || global_counter_transfer == 4'd13 || global_counter_transfer == 4'd3))
511 5 redbear 
                begin
512 6 redbear 
                        enable_n_char = 1'b1;
513 5 redbear 
                        enable_null = 1'b0;
514 
                end
515 
 
516 
        end
517 
        endcase
518 
 
519 
end
520 
 
521 
always@(posedge pclk_tx)
522 
begin
523 
        if(!enable_tx)
524 
        begin
525 
                null_s <= 8'h74;
526 
                fct_s  <= 4'h4;
527 
                eop_s  <= 4'h5;
528 
                eep_s  <= 4'h6;
529 
                timecode_s <= 14'h1e00;
530 
 
531 
                fct_flag <= 3'd0;
532 6 redbear 
                fct_send_last <= 3'd0;
533 
 
534 5 redbear 
                first_time <= 1'b1;
535 
                last_type  <= NULL;
536 
 
537 
                global_counter_transfer <= 4'd0;
538 
                txdata_flagctrl_tx_last <= 9'd0;
539 
                last_timein_control_flag_tx <= 8'd0;
540 6 redbear 
 
541 
                fct_counter_receive <= 6'd0;
542 
                fct_counter_last <= 6'd0;
543 
 
544 5 redbear 
                last_tx_dout      <= 1'b0;
545 
                last_tx_sout      <= 1'b0;
546 
                state_tx <= tx_spw_start;
547 
        end
548 
        else
549 
        begin
550 
 
551 
                state_tx <= next_state_tx;
552 
                last_tx_dout <= tx_dout;
553 
                last_tx_sout <= tx_sout;
554 
 
555 
                if(enable_null)
556 
                begin
557 6 redbear 
 
558 
                        //
559 
                        if(fct_send_last != fct_send)
560 
                        begin
561 
                                if(fct_send == 3'd1 && fct_send_last == 3'd7)
562 
                                begin
563 
                                        fct_flag <= fct_flag + 3'd1;
564 
                                end
565 
                                else
566 
                                begin
567 
                                        fct_flag <= fct_flag + (fct_send - fct_send_last);
568 
                                end
569 
 
570 
                                fct_send_last <= fct_send;
571 
                        end
572 
 
573 
                        //
574 
                        if(fct_counter_last != fct_counter)
575 
                        begin
576 
                                if(fct_counter == 6'd8 && fct_counter_last == 6'd56)
577 
                                begin
578 
                                        fct_counter_receive <= fct_counter_receive + 6'd8;
579 
                                end
580 
                                else
581 
                                begin
582 
                                        fct_counter_receive <= fct_counter_receive + (fct_counter - fct_counter_last);
583 
                                end
584 
 
585 
                                fct_counter_last <= fct_counter;
586 
                        end
587 
 
588 5 redbear 
                        if(first_time)
589 
                        begin
590 
                                first_time <= 1'b0;
591 
 
592 
                                global_counter_transfer <= global_counter_transfer + 4'd1;
593 
                        end
594 
                        else if(global_counter_transfer != 4'd7)
595 
                        begin
596 
                                global_counter_transfer <= global_counter_transfer + 4'd1;
597 
                        end
598 
                        else
599 
                        begin
600 
                                global_counter_transfer <= 4'd0;
601 
                        end
602 
                end
603 
                else if(enable_fct)
604 
                begin
605 6 redbear 
                        //
606 
                        if(fct_counter_last != fct_counter)
607 
                        begin
608 
                                if(fct_counter == 6'd8 && fct_counter_last == 6'd56)
609 
                                begin
610 
                                        fct_counter_receive <= fct_counter_receive + 6'd8;
611 
                                end
612 
                                else
613 
                                begin
614 
                                        fct_counter_receive <= fct_counter_receive + (fct_counter - fct_counter_last);
615 
                                end
616 
 
617 
                                fct_counter_last <= fct_counter;
618 
                        end
619 
 
620 5 redbear 
                        if(global_counter_transfer != 4'd3)
621 
                        begin
622 
                                global_counter_transfer <= global_counter_transfer + 4'd1;
623 
                        end
624 
                        else
625 
                        begin
626 
                                global_counter_transfer <= 4'd0;
627 6 redbear 
                                fct_flag <= fct_flag - 3'd1;
628 5 redbear 
                        end
629 
                end
630 
                else if(enable_time_code)
631 
                begin
632 6 redbear 
                        //
633 
                        if(fct_counter_last != fct_counter)
634 
                        begin
635 
                                if(fct_counter == 6'd8 && fct_counter_last == 6'd56)
636 
                                begin
637 
                                        fct_counter_receive <= fct_counter_receive + 6'd8;
638 
                                end
639 
                                else
640 
                                begin
641 
                                        fct_counter_receive <= fct_counter_receive + (fct_counter - fct_counter_last);
642 
                                end
643 
 
644 
                                fct_counter_last <= fct_counter;
645 
                        end
646 
 
647 
                        //
648 
                        if(fct_send_last != fct_send)
649 
                        begin
650 
                                if(fct_send == 3'd1 && fct_send_last == 3'd7)
651 
                                begin
652 
                                        fct_flag <= fct_flag + 3'd1;
653 
                                end
654 
                                else
655 
                                begin
656 
                                        fct_flag <= fct_flag + (fct_send - fct_send_last);
657 
                                end
658 
 
659 
                                fct_send_last <= fct_send;
660 
                        end
661 
 
662 5 redbear 
                        if(global_counter_transfer < 4'd13)
663 
                        begin
664 
                                global_counter_transfer <= global_counter_transfer + 4'd1;
665 
                                last_timein_control_flag_tx <= timecode_tx_i;
666 
                        end
667 
                        else
668 
                        begin
669 
                                global_counter_transfer <= 4'd0;
670 
                        end
671 
                end
672 
                else if(enable_n_char)
673 
                begin
674 6 redbear 
                        //
675 
                        if(fct_send_last != fct_send)
676 
                        begin
677 
                                if(fct_send == 3'd1 && fct_send_last == 3'd7)
678 
                                begin
679 
                                        fct_flag <= fct_flag + 3'd1;
680 
                                end
681 
                                else
682 
                                begin
683 
                                        fct_flag <= fct_flag + (fct_send - fct_send_last);
684 
                                end
685 
 
686 
                                fct_send_last <= fct_send;
687 
                        end
688 
 
689 5 redbear 
                        if(global_counter_transfer < 4'd9 && !data_tx_i[8])
690 
                        begin
691 
                                global_counter_transfer <= global_counter_transfer + 4'd1;
692 
                                txdata_flagctrl_tx_last <= data_tx_i;
693 
                        end
694 
                        else if(global_counter_transfer < 4'd3 && data_tx_i[8])
695 
                        begin
696 
                                global_counter_transfer <= global_counter_transfer + 4'd1;
697 
                                txdata_flagctrl_tx_last <= data_tx_i;
698 
                        end
699 
                        else
700 
                        begin
701 
                                global_counter_transfer <= 4'd0;
702 6 redbear 
                                fct_counter_receive <= fct_counter_receive - 6'd1;
703 5 redbear 
                        end
704 
                end
705 
 
706 
        end
707 
end
708 
 
709 
endmodule

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