Veriloghdl语言中图中这个“・”是什么意思？它是什么运算符？ 在 verilog hdl 语言中 <=表示什么？？比如q<...
\u5728verilog hdl\u4e2d&\u662f\u4ec0\u4e48\u8fd0\u7b97\u7b26\uff081\uff09\u6240\u6709\u7efc\u5408\u5de5\u5177\u90fd\u652f\u6301\u7684\u7ed3\u6784:always\uff0cassign\uff0cbegin\uff0cend\uff0ccase\uff0cwire\uff0ctri\uff0caupply0\uff0csupply1\uff0creg\uff0cinteger\uff0cdefault\uff0cfor\uff0cfunction\uff0cand\uff0cnand\uff0cor\uff0cnor\uff0cxor\uff0cxnor\uff0cbuf\uff0cnot\uff0cbufif0\uff0cbufif1\uff0cnotif0\uff0cnotif1\uff0cif\uff0cinout\uff0cinput\uff0cinstantitation\uff0cmodule\uff0cnegedge\uff0cposedge\uff0coperators\uff0coutput\uff0cparameter\u3002\uff082\uff09\u6240\u6709\u7efc\u5408\u5de5\u5177\u90fd\u4e0d\u652f\u6301\u7684\u7ed3\u6784:time\uff0cdefparam\uff0c$finish\uff0cfork\uff0cjoin\uff0cinitial\uff0cdelays\uff0cUDP\uff0cwait\u3002\uff083\uff09\u6709\u4e9b\u5de5\u5177\u652f\u6301\u6709\u4e9b\u5de5\u5177\u4e0d\u652f\u6301\u7684\u7ed3\u6784:casex\uff0ccasez\uff0cwand\uff0ctriand\uff0cwor\uff0ctrior\uff0creal\uff0cdisable\uff0cforever\uff0carrays\uff0cmemories\uff0crepeat\uff0ctask\uff0cwhile\u3002\u5efa\u7acb\u53ef\u7efc\u5408\u6a21\u578b\u7684\u539f\u5219\u8981\u4fdd\u8bc1VerilogHDL\u8d4b\u503c\u8bed\u53e5\u7684\u53ef\u7efc\u5408\u6027\uff0c\u5728\u5efa\u6a21\u65f6\u5e94\u6ce8\u610f\u4ee5\u4e0b\u8981\u70b9:\uff081\uff09\u4e0d\u4f7f\u7528initial\u3002\uff082\uff09\u4e0d\u4f7f\u7528#10\u3002\uff083\uff09\u4e0d\u4f7f\u7528\u5faa\u73af\u6b21\u6570\u4e0d\u786e\u5b9a\u7684\u5faa\u73af\u8bed\u53e5\uff0c\u5982forever\u3001while\u7b49\u3002\uff084\uff09\u4e0d\u4f7f\u7528\u7528\u6237\u81ea\u5b9a\u4e49\u539f\u8bed\uff08UDP\u5143\u4ef6\uff09\u3002\uff085\uff09\u5c3d\u91cf\u4f7f\u7528\u540c\u6b65\u65b9\u5f0f\u8bbe\u8ba1\u7535\u8def\u3002\uff086\uff09\u9664\u975e\u662f\u5173\u952e\u8def\u5f84\u7684\u8bbe\u8ba1\uff0c\u4e00\u822c\u4e0d\u91c7\u7528\u8c03\u7528\u95e8\u7ea7\u5143\u4ef6\u6765\u63cf\u8ff0\u8bbe\u8ba1\u7684\u65b9\u6cd5\uff0c\u5efa\u8bae\u91c7\u7528\u884c\u4e3a\u8bed\u53e5\u6765\u5b8c\u6210\u8bbe\u8ba1\u3002\uff087\uff09\u7528always\u8fc7\u7a0b\u5757\u63cf\u8ff0\u7ec4\u5408\u903b\u8f91\uff0c\u5e94\u5728\u654f\u611f\u4fe1\u53f7\u5217\u8868\u4e2d\u5217\u51fa\u6240\u6709\u7684\u8f93\u5165\u4fe1\u53f7\u3002\uff088\uff09\u6240\u6709\u7684\u5185\u90e8\u5bc4\u5b58\u5668\u90fd\u5e94\u8be5\u80fd\u591f\u88ab\u590d\u4f4d\uff0c\u5728\u4f7f\u7528FPGA\u5b9e\u73b0\u8bbe\u8ba1\u65f6\uff0c\u5e94\u5c3d\u91cf\u4f7f\u7528\u5668\u4ef6\u7684\u5168\u5c40\u590d\u4f4d\u7aef\u4f5c\u4e3a\u7cfb\u7edf\u603b\u7684\u590d\u4f4d\u3002\uff089\uff09\u5bf9\u65f6\u5e8f\u903b\u8f91\u63cf\u8ff0\u548c\u5efa\u6a21\uff0c\u5e94\u5c3d\u91cf\u4f7f\u7528\u975e\u963b\u585e\u8d4b\u503c\u65b9\u5f0f\u3002\u5bf9\u7ec4\u5408\u903b\u8f91\u63cf\u8ff0\u548c\u5efa\u6a21\uff0c\u65e2\u53ef\u4ee5\u7528\u963b\u585e\u8d4b\u503c\uff0c\u4e5f\u53ef\u4ee5\u7528\u975e\u963b\u585e\u8d4b\u503c\u3002\u4f46\u5728\u540c\u4e00\u4e2a\u8fc7\u7a0b\u5757\u4e2d\uff0c\u6700\u597d\u4e0d\u8981\u540c\u65f6\u7528\u963b\u585e\u8d4b\u503c\u548c\u975e\u963b\u585e\u8d4b\u503c\u3002\uff0810\uff09\u4e0d\u80fd\u5728\u4e00\u4e2a\u4ee5\u4e0a\u7684always\u8fc7\u7a0b\u5757\u4e2d\u5bf9\u540c\u4e00\u4e2a\u53d8\u91cf\u8d4b\u503c\u3002\u800c\u5bf9\u540c\u4e00\u4e2a\u8d4b\u503c\u5bf9\u8c61\u4e0d\u80fd\u65e2\u4f7f\u7528\u963b\u585e\u5f0f\u8d4b\u503c\uff0c\u53c8\u4f7f\u7528\u975e\u963b\u585e\u5f0f\u8d4b\u503c\u3002\uff0811\uff09\u5982\u679c\u4e0d\u6253\u7b97\u628a\u53d8\u91cf\u63a8\u5bfc\u6210\u9501\u5b58\u5668\uff0c\u90a3\u4e48\u5fc5\u987b\u5728if\u8bed\u53e5\u6216case\u8bed\u53e5\u7684\u6240\u6709\u6761\u4ef6\u5206\u652f\u4e2d\u90fd\u5bf9\u53d8\u91cf\u660e\u786e\u5730\u8d4b\u503c\u3002\uff0812\uff09\u907f\u514d\u6df7\u5408\u4f7f\u7528\u4e0a\u5347\u6cbf\u548c\u4e0b\u964d\u6cbf\u89e6\u53d1\u7684\u89e6\u53d1\u5668\u3002\uff0813\uff09\u540c\u4e00\u4e2a\u53d8\u91cf\u7684\u8d4b\u503c\u4e0d\u80fd\u53d7\u591a\u4e2a\u65f6\u949f\u63a7\u5236\uff0c\u4e5f\u4e0d\u80fd\u53d7\u4e24\u79cd\u4e0d\u540c\u7684\u65f6\u949f\u6761\u4ef6\uff08\u6216\u8005\u4e0d\u540c\u7684\u65f6\u949f\u6cbf\uff09\u63a7\u5236\u3002\uff0814\uff09\u907f\u514d\u5728case\u8bed\u53e5\u7684\u5206\u652f\u9879\u4e2d\u4f7f\u7528x\u503c\u6216z\u503c\u3002\u4e0d\u80fd\u7efc\u5408\u7684\u8bed\u53e5:1\u3001initial\u53ea\u80fd\u5728testbench\u4e2d\u4f7f\u7528\uff0c\u4e0d\u80fd\u7efc\u5408\u3002\uff08\u6211\u7528ISE9.1\u7efc\u5408\u65f6\uff0c\u6709\u7684\u7b80\u5355\u7684initial\u4e5f\u53ef\u4ee5\u7efc\u5408\uff0c\u4e0d\u77e5\u9053\u4e3a\u4ec0\u4e48\uff092\u3001eventsevent\u5728\u540c\u6b65testbench\u65f6\u66f4\u6709\u7528\uff0c\u4e0d\u80fd\u7efc\u5408\u30023\u3001real\u4e0d\u652f\u6301real\u6570\u636e\u7c7b\u578b\u7684\u7efc\u5408\u30024\u3001time\u4e0d\u652f\u6301time\u6570\u636e\u7c7b\u578b\u7684\u7efc\u5408\u30025\u3001force\u548crelease\u4e0d\u652f\u6301force\u548crelease\u7684\u7efc\u5408\u30026\u3001assign\u548cdeassign\u4e0d\u652f\u6301\u5bf9reg\u6570\u636e\u7c7b\u578b\u7684assign\u6216deassign\u8fdb\u884c\u7efc\u5408\uff0c\u652f\u6301\u5bf9wire\u6570\u636e\u7c7b\u578b\u7684assign\u6216deassign\u8fdb\u884c\u7efc\u5408\u30027\u3001forkjoin\u4e0d\u53ef\u7efc\u5408\uff0c\u53ef\u4ee5\u4f7f\u7528\u975e\u5757\u8bed\u53e5\u8fbe\u5230\u540c\u6837\u7684\u6548\u679c\u30028\u3001primitives\u652f\u6301\u95e8\u7ea7\u539f\u8bed\u7684\u7efc\u5408\uff0c\u4e0d\u652f\u6301\u975e\u95e8\u7ea7\u539f\u8bed\u7684\u7efc\u5408\u30029\u3001table\u4e0d\u652f\u6301UDP\u548ctable\u7684\u7efc\u5408\u300210\u3001\u654f\u611f\u5217\u8868\u91cc\u540c\u65f6\u5e26\u6709posedge\u548cnegedge\u5982:always@(posedgeclkornegedgeclk)beginend\u8fd9\u4e2aalways\u5757\u4e0d\u53ef\u7efc\u5408\u300211\u3001\u540c\u4e00\u4e2areg\u53d8\u91cf\u88ab\u591a\u4e2aalways\u5757\u9a71\u52a812\u3001\u5ef6\u65f6\u4ee5#\u5f00\u5934\u7684\u5ef6\u65f6\u4e0d\u53ef\u7efc\u5408\u6210\u786c\u4ef6\u7535\u8def\u5ef6\u65f6\uff0c\u7efc\u5408\u5de5\u5177\u4f1a\u5ffd\u7565\u6240\u6709\u5ef6\u65f6\u4ee3\u7801\uff0c\u4f46\u4e0d\u4f1a\u62a5\u9519\u3002\u5982:a=#10b\uff1b\u8fd9\u91cc\u7684#10\u662f\u7528\u4e8e\u4eff\u771f\u65f6\u7684\u5ef6\u65f6\uff0c\u5728\u7efc\u5408\u7684\u65f6\u5019\u7efc\u5408\u5de5\u5177\u4f1a\u5ffd\u7565\u5b83\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5728\u7efc\u5408\u7684\u65f6\u5019\u4e0a\u5f0f\u7b49\u540c\u4e8ea=b\uff1b13\u3001\u4e0eX\u3001Z\u7684\u6bd4\u8f83\u53ef\u80fd\u4f1a\u6709\u4eba\u559c\u6b22\u5728\u6761\u4ef6\u8868\u8fbe\u5f0f\u4e2d\u628a\u6570\u636e\u548cX(\u6216Z)\u8fdb\u884c\u6bd4\u8f83\uff0c\u6b8a\u4e0d\u77e5\u8fd9\u662f\u4e0d\u53ef\u7efc\u5408\u7684\uff0c\u7efc\u5408\u5de5\u5177\u540c\u6837\u4f1a\u5ffd\u7565\u3002\u6240\u4ee5\u8981\u786e\u4fdd\u4fe1\u53f7\u53ea\u6709\u4e24\u4e2a\u72b6\u6001:0\u62161\u3002
\u8fd9\u5c31\u8868\u793aq\u5728\u4e0b\u4e00\u4e2a\u65f6\u949f\u6cbf\u4f1a\u53d8\u62100,4\u4ee3\u88684bit\u4f4d\u5bbd\uff0ch\u4ee3\u886816\u8fdb\u5236\uff0c\u5177\u4f53\u662f\u4e0a\u5347\u6cbf\u8fd8\u662f\u4e0b\u964d\u6cbf\u5c31\u770b\u4f60\u81ea\u5df1\u63a7\u5236\u4e86\uff0c\u4e00\u822c\u662f\u4e0a\u5347\u6cbf\uff0c<=\u5c31\u8868\u793a\u975e\u963b\u585e\u8d4b\u503c\uff0c\u5982\u679c\u4f7f\u7528=\u90a3\u4ee3\u8868\u963b\u585e\u8d4b\u503c\uff0c\u4f7f\u7528\u963b\u585e\u65b9\u5f0f\u5bf9\u4e00\u4e2a\u53d8\u91cf\u8fdb\u884c\u8d4b\u503c\u65f6\uff0c\u6b64\u53d8\u91cf\u7684\u503c\u5728\u5728\u8d4b\u503c\u8bed\u53e5\u6267\u884c\u5b8c\u540e\u5c31\u7acb\u5373\u6539\u53d8\u3002
\u4f7f\u7528\u975e\u963b\u585e\u8d4b\u503c\u65b9\u5f0f\u8fdb\u884c\u8d4b\u503c\u65f6\uff0c\u5404\u4e2a\u8d4b\u503c\u8bed\u53e5\u540c\u6b65\u6267\u884c\uff1b\u56e0\u6b64\uff0c\u901a\u5e38\u5728\u4e00\u4e2a\u65f6\u949f\u6cbf\u5bf9\u4e34\u65f6\u53d8\u91cf\u8fdb\u884c\u8d4b\u503c\uff0c\u800c\u5728\u53e6\u4e00\u4e2a\u65f6\u949f\u6cbf\u5bf9\u5176\u8fdb\u884c\u91c7\u6837\u3002
绛旓細鍦verilog閲岄潰杩欎釜浣嶇疆鐨.澶氬崐鏄笌閫昏緫杩愮畻銆
绛旓細q鍜宷n鏄竴涓弽鍚戠殑鍏崇郴锛屾墍浠ヨ繖鍑犱釜璇彞鍜屼笅闈㈢殑~杩欎釜鍘诲弽杩愮畻鏁堟灉鏄竴鏍风殑銆俼瀵瑰簲涓嬪浘鐨凲锛宷n瀵瑰簲涓嬪浘涓婇潰鏈夋í鏉犵殑Q 鍙傝冭祫鏂欙細http://www.elecfans.com/article/88/131/sz/2009/2009093094569.html
绛旓細verilog鏄‖浠舵弿杩璇█锛HDL锛夌殑涓绉嶏紝鐢ㄤ簬鎻忚堪鏁板瓧鐢佃矾鐨勮涓哄拰缁撴瀯銆傚畠鏄紑鍙戞暟瀛楅泦鎴愮數璺紙IC锛夌殑閲嶈宸ュ叿锛屽湪鑺墖璁捐棰嗗煙琚箍娉涗娇鐢ㄣ備娇鐢╲erilog鍙互鎻忚堪閫昏緫銆佹椂搴忓拰缁撴瀯锛屽寘鎷紑鍏崇數璺佷唬鐮佺粍鍚堥昏緫銆佹椂搴忕數璺瓑绛夈傚畠鏄竴绉嶉珮绾ц瑷锛屽父鐢ㄤ簬鍦ㄨ姱鐗囪璁″懆鏈熺殑鍚勪釜闃舵杩涜璁捐銆佷豢鐪熴侀獙璇併佸畾浣嶉敊璇拰...
绛旓細鏁板瓧绯荤粺璁捐涓Verilog HDL鏁欑▼璇︾粏浠嬬粛浜嗗悇涓柟闈㈢殑鍐呭锛屽寘鎷細绗1绔狅紝EDA鎶鏈笌鏁板瓧绯荤粺璁捐锛岃杩颁簡EDA鎶鏈殑鍙戝睍鍘嗙▼锛屼互鍙婃暟瀛楃郴缁熻璁＄殑涓ょ涓昏鏂规硶鈥斺旇嚜椤跺悜涓嬭璁″拰鑷簳鍚戜笂璁捐锛屽己璋冧簡IP澶嶇敤涓嶴oC鍦ㄨ璁℃祦绋嬩腑鐨勯噸瑕佹с傜珷鑺備腑杩樻秹鍙婁簡璁捐鐨勫畬鏁存祦绋嬶紝鍖呮嫭杈撳叆銆佺患鍚堛侀傞厤銆佷豢鐪熷拰缂栫▼锛屼互鍙...
绛旓細锛坧osedge iclk) 鏄寚褰搃clk涓婂崌娌垮埌鏉ユ椂鍙墽琛屼竴娆°1. Verilog HDL鏄竴绉嶇‖浠舵弿杩璇█锛圚DL:Hardware Description Language锛夛紝浠ユ枃鏈舰寮忔潵鎻忚堪鏁板瓧绯荤粺纭欢鐨勭粨鏋勫拰琛屼负鐨勮瑷锛岀敤瀹冨彲浠ヨ〃绀洪昏緫鐢佃矾鍥俱侀昏緫琛ㄨ揪寮忥紝杩樺彲浠ヨ〃绀烘暟瀛楅昏緫绯荤粺鎵瀹屾垚鐨勯昏緫鍔熻兘銆2. Verilog HDL鍜孷HDL鏄笘鐣屼笂鏈娴佽鐨勪袱绉...
绛旓細闂涓崟璇嶆嫾鍐欐湁璇紝搴旇鏃禿efault銆傚湪case璇彞涓紝default鏄粯璁よ矾寰勶紝涔熷氨鏄锛屽叾浠栨潯浠堕兘涓嶆弧瓒虫椂锛岄夋嫨榛樿璺緞銆備妇涓緥瀛愶紝濡備笅鍥炬墍绀恒傚綋state_q涓嶇瓑浜嶴EQ_IDLE, SEQ_S0, SEQ_S1, SEQ_S2, SEQ_S3鏃讹紝閫夊彇default杩欐潯璺緞锛屾鏃,state_d璁剧疆涓篠EQ_IDLE.
绛旓細fpga寮鍙戠殑璇█鏄Verilog HDL銆俈erilog HDL鏄竴绉嶇‖浠舵弿杩拌瑷锛屼互鏂囨湰褰㈠紡鏉ユ弿杩版暟瀛楃郴缁熺‖浠剁殑缁撴瀯鍜岃涓虹殑璇█锛岀敤瀹冨彲浠ヨ〃绀洪昏緫鐢佃矾鍥俱侀昏緫琛ㄨ揪寮忥紝杩樺彲浠ヨ〃绀烘暟瀛楅昏緫绯荤粺鎵瀹屾垚鐨勯昏緫鍔熻兘銆俈erilog鐨勮璁″垵琛锋槸鎴愪负涓绉嶅熀鏈娉曚笌C璇█鐩歌繎鐨勭‖浠舵弿杩拌瑷銆傝繖鏄洜涓篊璇█鍦╒erilog璁捐涔嬪垵锛屽凡缁忓湪璁稿...
绛旓細Verilog HDL Verilog HDL鏄竴绉嶇‖浠舵弿杩璇█(HDL:Hardware Description Language)锛屼互鏂囨湰褰㈠紡鏉ユ弿杩版暟瀛楃郴缁熺‖浠剁殑缁撴瀯鍜岃涓虹殑璇█锛岀敤瀹冨彲浠ヨ〃绀洪昏緫鐢佃矾鍥俱侀昏緫琛ㄨ揪寮忥紝杩樺彲浠ヨ〃绀烘暟瀛楅昏緫绯荤粺鎵瀹屾垚鐨勯昏緫鍔熻兘銆 Verilog HDL鍜孷HDL鏄笘鐣屼笂鏈娴佽鐨勪袱绉嶇‖浠舵弿杩拌瑷锛岄兘鏄湪20涓栫邯80骞翠唬涓湡寮鍙戝嚭鏉ョ殑銆傚墠...
绛旓細浠lk涓簂ed娴佹按鐏(鍏辫12涓狶ED鐏)鐨勯┍鍔ㄦ椂閽熴愯姹備綆棰戯紝濡1Hz銆戯紝rst涓轰笂鍗囨部澶嶄綅淇″彿锛堝紓姝ワ級銆傚垯鎵瀹炵幇鐨Verilog HDL浠ｇ爜閮ㄥ垎濡備笅锛歮odule led_run(clk,led,rst);input clk;//clk with low frequency like 1Hz input rst;//system reset signal output [11:0] led;//denotes 12 leds,reg [...
绛旓細浣犵湅鍥惧彲浠ョ煡閬撳緢绫讳技SPI鍢涳紝鍍廳atain鏁版嵁浼犺緭鏄椂閽熶笂鍗囨部鏀炬暟鎹紝涓嬮檷娌胯鏁版嵁锛屽儚AD妯″潡锛屽彂鍑哄幓鍛戒护鍚庯紝妯″潡浼氭妸閲囬泦鐨勬暟鎹彂鍥炴潵锛岄偅涔堥氳繃淇″彿绾縟atain鍏堝彂鍑哄幓鍙兘16浣嶇殑鏁版嵁锛屾瘡涓浣嶆槸鍦ㄤ笂鍗囨部鍐欏叆锛屾ā鍧椾細鑷姩鍦ㄤ笅闄嶆部鎻愬彇杩欎笉鐢ㄥ挶鎿嶅績锛屽懡浠ゅ彂閫佽繃绋嬩腑锛宒ataout涓鐩存槸楂樼數骞虫垨鑰呮牴鎹‖浠朵笉鍚...
