P2P5meas.txt 15 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643
  1. // `timescale 1ns / 1ns
  2. module S5443TopPMTb;
  3. //=================================================================================================================================================================================================================
  4. //COMMANDS FOR REG_MAP
  5. parameter [31:0] MeasCmd = {8'h11,8'h0,8'h72,8'h0};
  6. parameter [31:0] IfFtwH = {8'h15,16'h0,8'h23};
  7. parameter [31:0] IfFtwL = {8'h16,24'h51eb85};
  8. parameter [31:0] PulseMeasCtrlCmd = {8'h1b,12'h0,4'h0,8'h1};
  9. parameter [31:0] PG12ModeRegCmd = {8'h0b,8'h0,8'h1,8'h1};
  10. parameter [31:0] PG34GModeRegCmd = {8'h0c,8'h0,8'h1,8'h1};
  11. parameter [31:0] GGPnumRegCmd = {8'h0d,24'h1};
  12. //PG1 Cmd
  13. parameter [31:0] PG1P1DelayRegCmd = {8'h28,24'd10};
  14. parameter [31:0] PG1P2DelayRegCmd = {8'h29,24'd50};
  15. parameter [31:0] PG1P3DelayRegCmd = {8'h2a,24'd90};
  16. parameter [31:0] PG1P123DelayRegCmd = {8'h2b,24'd0};
  17. parameter [31:0] PG1P1WidthRegCmd = {8'h2c,24'd30};
  18. parameter [31:0] PG1P2WidthRegCmd = {8'h2d,24'd30};
  19. parameter [31:0] PG1P3WidthRegCmd = {8'h2e,24'd30};
  20. parameter [31:0] PG1P123WidthRegCmd = {8'h2f,24'd0};
  21. //SSG Cmd
  22. parameter [31:0] SSGP1DelayRegCmd = {8'h4e,24'd20};
  23. parameter [31:0] SSGP2DelayRegCmd = {8'h4f,24'd35};
  24. parameter [31:0] SSGP12DelNumRegCmd = {8'h50,24'd0};
  25. parameter [31:0] SSGPNumRegCmd = {8'h51,24'd1};
  26. parameter [31:0] RefSeqPerRegCmd = {8'h52,24'd59};
  27. parameter [31:0] MeasNumRegCmd = {8'h53,24'd5};
  28. parameter [31:0] RefSeqPerMNumRegCmd = {8'h54,24'd0};
  29. //PG1-4 Cmd
  30. parameter [31:0] PG1PNumRegCmd = {8'h48,24'd1};
  31. parameter [31:0] PG2PNumRegCmd = {8'h49,24'd1};
  32. parameter [31:0] PG3PNumRegCmd = {8'h4a,24'd1};
  33. parameter [31:0] PG4PNumRegCmd = {8'h4b,24'd1};
  34. parameter [31:0] PG12PNumRegCmd = {8'h4c,24'd0};
  35. parameter [31:0] PG34GPNumRegCmd = {8'h4d,24'd0};
  36. //Gating Gen Cmd
  37. parameter [31:0] GGP1DelayRegCmd = {8'h1c,24'd6};
  38. parameter [31:0] GGP2DelayRegCmd = {8'h1d,24'd16};
  39. parameter [31:0] GGP3DelayRegCmd = {8'h1e,24'd31};
  40. parameter [31:0] GGP123DelayRegCmd = {8'h1f,24'd0};
  41. parameter [31:0] GGP1WidthRegCmd = {8'h20,24'd45};
  42. parameter [31:0] GGP2WidthRegCmd = {8'h21,24'd5};
  43. parameter [31:0] GGP3WidthRegCmd = {8'h22,24'd6};
  44. parameter [31:0] GGP123WidthRegCmd = {8'h23,24'd0};
  45. parameter [31:0] FilterCorrCmdH = {8'h17,24'hD70A3D};
  46. parameter [31:0] FilterCorrCmdL = {8'h18,24'hD70A3D};
  47. //PG2 Cmd
  48. parameter [31:0] PG2P1DelayRegCmd = {8'h30,24'd5};
  49. parameter [31:0] PG2P2DelayRegCmd = {8'h31,24'd15};
  50. parameter [31:0] PG2P3DelayRegCmd = {8'h32,24'd30};
  51. parameter [31:0] PG2P123DelayRegCmd = {8'h33,24'd0};
  52. parameter [31:0] PG2P1WidthRegCmd = {8'h34,24'd5};
  53. parameter [31:0] PG2P2WidthRegCmd = {8'h35,24'd6};
  54. parameter [31:0] PG2P3WidthRegCmd = {8'h36,24'd7};
  55. parameter [31:0] PG2P123WidthRegCmd = {8'h37,24'd0};
  56. //PG3 Cmd
  57. parameter [31:0] PG3P1DelayRegCmd = {8'h38,24'd5};
  58. parameter [31:0] PG3P2DelayRegCmd = {8'h39,24'd15};
  59. parameter [31:0] PG3P3DelayRegCmd = {8'h3a,24'd30};
  60. parameter [31:0] PG3P123DelayRegCmd = {8'h3b,24'd0};
  61. parameter [31:0] PG3P1WidthRegCmd = {8'h3c,24'd5};
  62. parameter [31:0] PG3P2WidthRegCmd = {8'h3d,24'd6};
  63. parameter [31:0] PG3P3WidthRegCmd = {8'h3e,24'd7};
  64. parameter [31:0] PG3P123WidthRegCmd = {8'h3f,24'd0};
  65. //PG4 Cmd
  66. parameter [31:0] PG4P1DelayRegCmd = {8'h40,24'd5};
  67. parameter [31:0] PG4P2DelayRegCmd = {8'h41,24'd15};
  68. parameter [31:0] PG4P3DelayRegCmd = {8'h42,24'd30};
  69. parameter [31:0] PG4P123DelayRegCmd = {8'h43,24'd0};
  70. parameter [31:0] PG4P1WidthRegCmd = {8'h44,24'd5};
  71. parameter [31:0] PG4P2WidthRegCmd = {8'h45,24'd6};
  72. parameter [31:0] PG4P3WidthRegCmd = {8'h46,24'd7};
  73. parameter [31:0] PG4P123WidthRegCmd = {8'h47,24'd0};
  74. //=================================================================================================================================================================================================================
  75. reg Clk41;
  76. reg Clk82;
  77. reg Clk50;
  78. reg Clk70;
  79. reg Dclk175;
  80. reg Clk350;
  81. reg Clk125;
  82. reg [31:0] tb_cnt=4'd0;
  83. reg rst;
  84. reg mosi_i = 1'b0;
  85. reg Miso_i = 1'b0;
  86. reg ss_i;
  87. reg clk_i = 1'b0;
  88. reg [31:0] DspSpiData;
  89. reg startCalcCmdReg;
  90. wire startCalcCmdRegO;
  91. wire [13:0] cos_value;
  92. wire [17:0] sin_value;
  93. wire ExtDspTrigPos0 = (tb_cnt >= 180 && tb_cnt <= 181)? 1'b1:1'b0;
  94. wire ExtDspTrigNeg0 = (tb_cnt >= 180 && tb_cnt <= 181)? 1'b0:1'b1;
  95. // wire ExtTrigger0 = (tb_cnt <= 150)? ExtDspTrigPos0:ExtDspTrigNeg0;
  96. wire ExtTrigger0 = ExtDspTrigNeg0;
  97. wire TrigFromDsp = (tb_cnt >= 1100 && tb_cnt <= 1101)? 1'b1:1'b0;
  98. wire endMeas;
  99. reg [31:0] cmdCnt;
  100. reg trig0;
  101. reg trig1;
  102. wire trig0R;
  103. wire trig1R;
  104. assign trig0R = trig0;
  105. assign trig1R = trig1;
  106. //==========================================================================================
  107. //clocks gen
  108. always #10 Clk50 = ~Clk50;
  109. always #8 Clk125 = ~Clk125;
  110. always #14.285714285714 Clk70 = ~Clk70;
  111. always #10 clk_i = ~clk_i;
  112. always #(24.390243902439/2) Clk41 = ~Clk41;
  113. reg Dclk175Reg;
  114. wire sck_i;
  115. //==========================================================================================
  116. initial begin
  117. Clk50 = 1'b1;
  118. Clk70 = 1'b1;
  119. Clk125 = 1'b1;
  120. rst = 1'b1;
  121. Clk41 = 1'b0;
  122. startCalcCmdReg = 1'b0;
  123. trig0 = 1'b0;
  124. trig1 = 1'b0;
  125. #100;
  126. rst = 1'b0;
  127. #400;
  128. Clk41 = 1'b0;
  129. end
  130. reg endMeasReg;
  131. always @(posedge Clk41) begin
  132. endMeasReg <= endMeas;
  133. end
  134. wire endMeasNeg = !endMeas&endMeasReg;
  135. always @(posedge Clk70) begin
  136. if (tb_cnt == 3000) begin
  137. startCalcCmdReg <= 1'b1;
  138. end else if (endMeas) begin
  139. startCalcCmdReg <= 1'b0;
  140. end
  141. end
  142. always @(negedge Clk41) begin
  143. if (!rst) begin
  144. tb_cnt <= tb_cnt+1;
  145. end else begin
  146. tb_cnt <= 0;
  147. end
  148. end
  149. reg startMeasSync;
  150. always @(posedge Clk41) begin
  151. startMeasSync <= startCalcCmdRegO;
  152. end
  153. wire Adc1DataDa0P;
  154. wire Adc1DataDa1P;
  155. wire [31:0] test = 32'h2351eb85;
  156. CordicNco
  157. #( .ODatWidth (18),
  158. .PhIncWidth (32),
  159. .IterNum (10),
  160. .EnSinN (0))
  161. ncoInst
  162. (
  163. .Clk_i (Clk50),
  164. .Rst_i (rst),
  165. .Val_i (1'b1),
  166. .PhaseInc_i (test>>1),
  167. .WindVal_i (1'b1),
  168. .WinType_i (),
  169. .Wind_o (),
  170. .Sin_o (sin_value),
  171. .Cos_o (cos_value),
  172. .Val_o ()
  173. );
  174. wire [13:0] TPSK1 = 14'h1;
  175. wire [13:0] TPSKN1 = 14'b11111111111111;
  176. wire [13:0] I = (tb_cnt >= 300 && tb_cnt <= 500)? TPSK1:TPSKN1;
  177. wire [13:0] Q = (tb_cnt >= 200 && tb_cnt <= 500)? TPSKN1:TPSK1;
  178. //----------------------------------------------
  179. // Module generates wind for measurement
  180. wire [17:0] wind;
  181. wire [13:0] adcWind;
  182. CordicNco
  183. #(
  184. .ODatWidth (18),
  185. .PhIncWidth (32),
  186. .IterNum (10),
  187. .EnSinN (0),
  188. .WinTypeW (3)
  189. )
  190. winGenInst
  191. (
  192. .Clk_i (Clk50),
  193. .Rst_i (1'b0),
  194. .Val_i (1'b1),
  195. .PhaseInc_i (32'h45>>1),
  196. .WinType_i (0),
  197. .WindVal_i (1'b1),
  198. .Wind_o (wind),
  199. .Sin_o (),
  200. .Cos_o (),
  201. .Val_o ()
  202. );
  203. SimpleMult
  204. #(
  205. .FactorAWidth (18),
  206. .FactorBWidth (18),
  207. .OutputWidth (14)
  208. )
  209. AdcWindMult
  210. (
  211. .Rst_i (1'b0),
  212. .Clk_i (Clk50),
  213. .Val_i (1'b1),
  214. .FactorA_i (sin_value),
  215. .FactorB_i (wind),
  216. .Result_o (adcWind),
  217. .ResultVal_o()
  218. );
  219. S5443Top uut (
  220. .Clk_i (Clk50),
  221. .Led_o (),
  222. //------------------------------------------
  223. .Adc1FclkP_i (Clk70),
  224. .Adc1FclkN_i (~Clk70),
  225. .Adc1DataDa0P_i (Adc1DataDa0P),
  226. .Adc1DataDa0N_i (~Adc1DataDa0P),
  227. .Adc1DataDa1P_i (Adc1DataDa1P),
  228. .Adc1DataDa1N_i (~Adc1DataDa1P),
  229. .Adc1DataDb0P_i (Adc1DataDa0P),
  230. .Adc1DataDb0N_i (~Adc1DataDa0P),
  231. .Adc1DataDb1P_i (Adc1DataDa1P),
  232. .Adc1DataDb1N_i (~Adc1DataDa1P),
  233. //------------------------------------------
  234. .Adc2FclkP_i (Clk70),
  235. .Adc2FclkN_i (~Clk70),
  236. .Adc2DataDa0P_i (1'b1),
  237. .Adc2DataDa0N_i (1'b0),
  238. .Adc2DataDa1P_i (1'b1),
  239. .Adc2DataDa1N_i (1'b0),
  240. .Adc2DataDb0P_i (1'b1),
  241. .Adc2DataDb0N_i (1'b0),
  242. .Adc2DataDb1P_i (1'b1),
  243. .Adc2DataDb1N_i (1'b0),
  244. //------------------------------------------
  245. .AdcInitMosi_o (),
  246. .AdcInitClk_o (),
  247. .Adc1InitCs_o (),
  248. .Adc2InitCs_o (),
  249. .AdcInitRst_o (),
  250. //------------------------------------------
  251. .Mosi_i (mosi_i),
  252. .Sck_i (~sck_i),
  253. .Ss_i (ss_i),
  254. .LpOutClk_o (),
  255. .LpOutFs_o (),
  256. .LpOutData_o (),
  257. //fpga-dsp signals
  258. .StartMeas_i (startCalcCmdReg),
  259. .StartMeas_o (),
  260. .EndMeas_o (endMeas),
  261. .TimersClk_o (),
  262. .Trig0_io (trig0R), //Trigger0 from/to external device
  263. .Trig0Dir_o (), //Trigger0 direction
  264. .Trig1_io (trig1R), //Trigger0 from/to external device
  265. .Trig1Dir_o (), //Trigger0 direction
  266. .TrigFromDsp_i (), //Trig from DSP
  267. .TrigToDsp_o (), //Trig To DSP
  268. .OverloadS_i (1'b0),
  269. .Overload_o (),
  270. //mod out line
  271. .Mod_o (),
  272. //gain lines
  273. .SensEnS_i (1'b0),
  274. .AmpEn_o (), // 0-adc1ChA 1-adc1ChB 2-adc2ChA 3-adc2ChB
  275. .AdcData_i (adcWind)
  276. );
  277. parameter IDLE = 2'h0;
  278. parameter CMD = 2'h1;
  279. parameter TX = 2'h2;
  280. parameter PAUSE = 2'h3;
  281. reg [1:0] txCurrState;
  282. reg [1:0] txNextState;
  283. wire txWork = tb_cnt >= 23;
  284. wire txStop = cmdCnt >= 62;
  285. reg [6:0] txCnt;
  286. reg [3:0] pauseCnt;
  287. always @(posedge Clk41) begin
  288. if (!rst) begin
  289. if (txCurrState == CMD) begin
  290. if (!txStop) begin
  291. cmdCnt <= cmdCnt+1;
  292. end
  293. end
  294. end else begin
  295. cmdCnt <= 0;
  296. end
  297. end
  298. always @(posedge Clk41) begin
  299. if (!rst) begin
  300. if (txCurrState == TX) begin
  301. txCnt <= txCnt+1;
  302. end else begin
  303. txCnt <= 0;
  304. end
  305. end else begin
  306. txCnt <= 0;
  307. end
  308. end
  309. always @(posedge Clk41) begin
  310. if (!rst) begin
  311. if (txCurrState == PAUSE) begin
  312. pauseCnt <= pauseCnt+1;
  313. end else begin
  314. pauseCnt <= 0;
  315. end
  316. end else begin
  317. pauseCnt <= 0;
  318. end
  319. end
  320. always @(posedge Clk41) begin
  321. if (txCurrState == CMD) begin
  322. if (cmdCnt == 0) begin
  323. DspSpiData <= MeasCmd;
  324. end else if (cmdCnt == 1) begin
  325. DspSpiData <= IfFtwH;
  326. end else if (cmdCnt == 2) begin
  327. DspSpiData <= IfFtwL;
  328. end else if (cmdCnt == 3) begin
  329. DspSpiData <= RefSeqPerMNumRegCmd;
  330. end else if (cmdCnt == 4) begin
  331. DspSpiData <= PG12ModeRegCmd;
  332. end else if (cmdCnt == 5) begin
  333. DspSpiData <= PG34GModeRegCmd;
  334. end else if (cmdCnt == 6) begin
  335. DspSpiData <= GGPnumRegCmd;
  336. end else if (cmdCnt == 7) begin
  337. DspSpiData <= PG1P1DelayRegCmd;
  338. end else if (cmdCnt == 8) begin
  339. DspSpiData <= PG1P2DelayRegCmd;
  340. end else if (cmdCnt == 9) begin
  341. DspSpiData <= PG1P3DelayRegCmd;
  342. end else if (cmdCnt == 10) begin
  343. DspSpiData <= PG1P123DelayRegCmd;
  344. end else if (cmdCnt == 11) begin
  345. DspSpiData <= PG1P1WidthRegCmd;
  346. end else if (cmdCnt == 12) begin
  347. DspSpiData <= PG1P2WidthRegCmd;
  348. end else if (cmdCnt == 13) begin
  349. DspSpiData <= PG1P3WidthRegCmd;
  350. end else if (cmdCnt == 14) begin
  351. DspSpiData <= PG1P123WidthRegCmd;
  352. end else if (cmdCnt == 15) begin
  353. DspSpiData <= PG2P1DelayRegCmd;
  354. end else if (cmdCnt == 16) begin
  355. DspSpiData <= PG2P2DelayRegCmd;
  356. end else if (cmdCnt == 17) begin
  357. DspSpiData <= PG2P3DelayRegCmd;
  358. end else if (cmdCnt == 18) begin
  359. DspSpiData <= PG2P123DelayRegCmd;
  360. end else if (cmdCnt == 19) begin
  361. DspSpiData <= PG2P1WidthRegCmd;
  362. end else if (cmdCnt == 20) begin
  363. DspSpiData <= PG2P2WidthRegCmd;
  364. end else if (cmdCnt == 21) begin
  365. DspSpiData <= PG2P3WidthRegCmd;
  366. end else if (cmdCnt == 22) begin
  367. DspSpiData <= PG2P123WidthRegCmd;
  368. end else if (cmdCnt == 23) begin
  369. DspSpiData <= PG3P1DelayRegCmd;
  370. end else if (cmdCnt == 24) begin
  371. DspSpiData <= PG3P2DelayRegCmd;
  372. end else if (cmdCnt == 25) begin
  373. DspSpiData <= PG3P3DelayRegCmd;
  374. end else if (cmdCnt == 26) begin
  375. DspSpiData <= PG3P123DelayRegCmd;
  376. end else if (cmdCnt == 27) begin
  377. DspSpiData <= PG3P1WidthRegCmd;
  378. end else if (cmdCnt == 28) begin
  379. DspSpiData <= PG3P2WidthRegCmd;
  380. end else if (cmdCnt == 29) begin
  381. DspSpiData <= PG3P3WidthRegCmd;
  382. end else if (cmdCnt == 30) begin
  383. DspSpiData <= PG3P123WidthRegCmd;
  384. end else if (cmdCnt == 31) begin
  385. DspSpiData <= PG4P1DelayRegCmd;
  386. end else if (cmdCnt == 32) begin
  387. DspSpiData <= PG4P2DelayRegCmd;
  388. end else if (cmdCnt == 33) begin
  389. DspSpiData <= PG4P3DelayRegCmd;
  390. end else if (cmdCnt == 34) begin
  391. DspSpiData <= PG4P123DelayRegCmd;
  392. end else if (cmdCnt == 35) begin
  393. DspSpiData <= PG4P1WidthRegCmd;
  394. end else if (cmdCnt == 36) begin
  395. DspSpiData <= PG4P2WidthRegCmd;
  396. end else if (cmdCnt == 37) begin
  397. DspSpiData <= PG4P3WidthRegCmd;
  398. end else if (cmdCnt == 38) begin
  399. DspSpiData <= PG4P123WidthRegCmd;
  400. end else if (cmdCnt == 39) begin
  401. DspSpiData <= PG1PNumRegCmd;
  402. end else if (cmdCnt == 40) begin
  403. DspSpiData <= PG2PNumRegCmd;
  404. end else if (cmdCnt == 41) begin
  405. DspSpiData <= PG3PNumRegCmd;
  406. end else if (cmdCnt == 42) begin
  407. DspSpiData <= PG4PNumRegCmd;
  408. end else if (cmdCnt == 43) begin
  409. DspSpiData <= PG12PNumRegCmd;
  410. end else if (cmdCnt == 44) begin
  411. DspSpiData <= PG34GPNumRegCmd;
  412. end else if (cmdCnt == 45) begin
  413. DspSpiData <= GGP1DelayRegCmd;
  414. end else if (cmdCnt == 46) begin
  415. DspSpiData <= GGP2DelayRegCmd;
  416. end else if (cmdCnt == 47) begin
  417. DspSpiData <= GGP3DelayRegCmd;
  418. end else if (cmdCnt == 48) begin
  419. DspSpiData <= GGP123DelayRegCmd;
  420. end else if (cmdCnt == 49) begin
  421. DspSpiData <= GGP1WidthRegCmd;
  422. end else if (cmdCnt == 50) begin
  423. DspSpiData <= GGP2WidthRegCmd;
  424. end else if (cmdCnt == 51) begin
  425. DspSpiData <= GGP3WidthRegCmd;
  426. end else if (cmdCnt == 52) begin
  427. DspSpiData <= GGP123WidthRegCmd;
  428. end else if (cmdCnt == 53) begin
  429. DspSpiData <= SSGP1DelayRegCmd;
  430. end else if (cmdCnt == 54) begin
  431. DspSpiData <= SSGP2DelayRegCmd;
  432. end else if (cmdCnt == 55) begin
  433. DspSpiData <= SSGP12DelNumRegCmd;
  434. end else if (cmdCnt == 56) begin
  435. DspSpiData <= SSGPNumRegCmd;
  436. end else if (cmdCnt == 57) begin
  437. DspSpiData <= RefSeqPerRegCmd;
  438. end else if (cmdCnt == 58) begin
  439. DspSpiData <= MeasNumRegCmd;
  440. end else if (cmdCnt == 59) begin
  441. DspSpiData <= PulseMeasCtrlCmd;
  442. end else if (cmdCnt == 60) begin
  443. DspSpiData <= FilterCorrCmdH;
  444. end else if (cmdCnt == 61) begin
  445. DspSpiData <= FilterCorrCmdL;
  446. end
  447. end else if (txCurrState == TX) begin
  448. DspSpiData <= DspSpiData<<1;
  449. end
  450. end
  451. always @(posedge Clk41) begin
  452. if (txCurrState == TX) begin
  453. if (txCnt >= 7'd0) begin
  454. mosi_i <= DspSpiData[31];
  455. end else begin
  456. mosi_i <= 1'b1;
  457. end
  458. end else begin
  459. mosi_i <= 1'b1;
  460. end
  461. end
  462. always @(posedge Clk41) begin
  463. if (txCurrState == TX) begin
  464. ss_i <= 1'b0;
  465. end else begin
  466. ss_i <= 1'b1;
  467. end
  468. end
  469. assign sck_i = Clk41;
  470. always @(posedge Clk41) begin
  471. if (rst) begin
  472. txCurrState <= IDLE;
  473. end else begin
  474. txCurrState <= txNextState;
  475. end
  476. end
  477. always @(*) begin
  478. txNextState = IDLE;
  479. case(txCurrState)
  480. IDLE : begin
  481. if (txWork) begin
  482. txNextState = CMD;
  483. end else begin
  484. txNextState = IDLE;
  485. end
  486. end
  487. CMD : begin
  488. if (!txStop) begin
  489. txNextState = TX;
  490. end else begin
  491. txNextState = IDLE;
  492. end
  493. end
  494. TX : begin
  495. if (txCnt==6'd31) begin
  496. txNextState = PAUSE;
  497. end else begin
  498. txNextState = TX;
  499. end
  500. end
  501. PAUSE : begin
  502. if (pauseCnt==4'd10) begin
  503. txNextState = CMD;
  504. end else begin
  505. txNextState = PAUSE;
  506. end
  507. end
  508. endcase
  509. end
  510. endmodule