{"id":4878,"date":"2024-10-08T11:01:01","date_gmt":"2024-10-08T03:01:01","guid":{"rendered":""},"modified":"2024-10-08T11:01:01","modified_gmt":"2024-10-08T03:01:01","slug":"HDLBits(\u516b)\u5b66\u4e60\u7b14\u8bb0\u2014\u2014Counters(\u8ba1\u6570\u5668)","status":"publish","type":"post","link":"https:\/\/mushiming.com\/4878.html","title":{"rendered":"HDLBits(\u516b)\u5b66\u4e60\u7b14\u8bb0\u2014\u2014Counters(\u8ba1\u6570\u5668)"},"content":{"rendered":"<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"display: none;\"> \n <path stroke-linecap=\"round\" d=\"M5,0 0,2.5 5,5z\" id=\"raphael-marker-block\" style=\"-webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"><\/path> \n<\/svg> <\/p>\n<div class=\"toc\">\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>Count15<\/li>\n<li>Count10<\/li>\n<li>Count 1to10<\/li>\n<li>Countslow<\/li>\n<li>Count 1-12<\/li>\n<li>Count 1000<\/li>\n<li>Count bcd<\/li>\n<li>Count clock<\/li>\n<\/ul>\n<\/div>\n<h2>Count15<\/h2>\n<p>\u6784\u5efa\u4e00\u4e2a 4 \u4f4d\u4e8c\u8fdb\u5236\u8ba1\u6570\u5668\uff0c\u8be5\u8ba1\u6570\u5668\u7684\u8ba1\u6570\u8303\u56f4\u4e3a 0 \u5230 15\uff08\u5305\u62ec 15\uff09\uff0c\u5468\u671f\u4e3a 16\u3002\u590d\u4f4d\u8f93\u5165\u662f<strong>\u540c\u6b65<\/strong>\u7684\uff0c\u5e94\u5c06\u8ba1\u6570\u5668\u590d\u4f4d\u81f3<strong>0<\/strong>\u3002<br \/> <img decoding=\"async\" src=\"https:\/\/img-blog.csdnimg.cn\/efb425ab522441f48ea2414ab78c52d6.png\" =\"\" =\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" alt=\"HDLBits(\u516b)\u5b66\u4e60\u7b14\u8bb0\u2014\u2014Counters(\u8ba1\u6570\u5668) (https:\/\/mushiming.com\/)  \u7b2c1\u5f20\" title=\"HDLBits(\u516b)\u5b66\u4e60\u7b14\u8bb0\u2014\u2014Counters(\u8ba1\u6570\u5668)  \u7b2c1\u5f20-\u7a46\u4e16\u660e\u535a\u5ba2\" ><br \/> \u6539\u9898\u76ee\u4e24\u4e2a\u6ce8\u610f\u70b9\uff1a<\/p>\n<ul>\n<li class=\"task-list-item\"><input type=\"checkbox\" class=\"task-list-item-checkbox\" disabled> \u540c\u6b65\u590d\u4f4d<\/li>\n<li class=\"task-list-item\"><input type=\"checkbox\" class=\"task-list-item-checkbox\" disabled> \u56fe\u7247\u53ef\u77e5\u4f4e\u7535\u5e73\u6709\u6548<\/li>\n<\/ul>\n<pre class=\"language-java prettyprint linenums\"><code class=\"prism language-bash\">module top_module <span class=\"token punctuation\">(<\/span> input clk, input reset, \/\/ Synchronous active-high reset output <span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span>:0<span class=\"token punctuation\">]<\/span> q <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> always @ <span class=\"token punctuation\">(<\/span>posedge clk <span class=\"token punctuation\">)<\/span>begin if<span class=\"token punctuation\">(<\/span>reset<span class=\"token punctuation\">)<\/span>begin q <span class=\"token operator\">&lt;=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> end <span class=\"token keyword\">else<\/span> q <span class=\"token operator\">&lt;=<\/span> q+4'b1<span class=\"token punctuation\">;<\/span> end endmodule <\/code><\/pre>\n<h2>Count10<\/h2>\n<p>\u6784\u5efa\u4e00\u4e2a\u4ece 0 \u5230 9\uff08\u542b\uff09\u8ba1\u6570\u7684\u5341\u8fdb\u5236\u8ba1\u6570\u5668\uff0c\u5468\u671f\u4e3a 10\u3002\u590d\u4f4d\u8f93\u5165\u662f\u540c\u6b65\u7684\uff0c\u5e94\u5c06\u8ba1\u6570\u5668\u590d\u4f4d\u81f30\u3002<br \/> <img decoding=\"async\" src=\"https:\/\/img-blog.csdnimg.cn\/89104cbce5de44318eb26f4dfb189c0e.png\" =\"\" =\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" alt=\"HDLBits(\u516b)\u5b66\u4e60\u7b14\u8bb0\u2014\u2014Counters(\u8ba1\u6570\u5668) (https:\/\/mushiming.com\/)  \u7b2c2\u5f20\" title=\"HDLBits(\u516b)\u5b66\u4e60\u7b14\u8bb0\u2014\u2014Counters(\u8ba1\u6570\u5668)  \u7b2c2\u5f20-\u7a46\u4e16\u660e\u535a\u5ba2\" ><br \/> \u6b64\u9898\u4e0e\u4e0a\u9898\u7684\u6ce8\u610f\u70b9\u76f8\u540c\uff0c\u4e0d\u540c\u4e3b\u8981\u5728\u4e8eq\u4e3a4\u4f4d\uff0c\u5982\u679c\u4e0d\u8fdb\u884c\u6e05\u96f6\u64cd\u4f5c\uff0c\u90a3\u4e48\u5c31\u4f1a\u4e00\u76f4\u8ba1\u6570\u523015\uff0c\u56e0\u6b64\u8981\u60f3\u5468\u671f\u4e3a10\uff0c\u5c31\u8981\u8ba1\u6570\u52309\u7684\u65f6\u5019\u6e05\u96f6\u3002<\/p>\n<pre class=\"language-java prettyprint linenums\"><code class=\"prism language-bash\">module top_module <span class=\"token punctuation\">(<\/span> input clk, input reset, \/\/ Synchronous active-high reset output <span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span>:0<span class=\"token punctuation\">]<\/span> q <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> always @ <span class=\"token punctuation\">(<\/span>posedge clk <span class=\"token punctuation\">)<\/span>begin if<span class=\"token punctuation\">(<\/span>reset<span class=\"token punctuation\">)<\/span>begin q <span class=\"token operator\">&lt;=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> end <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>q <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'d9)begin \/\/q &gt;= 4'<\/span>d9\u4e5f\u53ef q <span class=\"token operator\">&lt;=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> end <span class=\"token keyword\">else<\/span> begin q <span class=\"token operator\">&lt;=<\/span> q+4'b1<span class=\"token punctuation\">;<\/span> end end endmodule <\/code><\/pre>\n<h2>Count 1to10<\/h2>\n<p>\u5236\u4f5c\u4e00\u4e2a\u5341\u8fdb\u5236\u8ba1\u6570\u5668\uff0c\u5305\u62ec 1 \u5230 10\u3002<strong>\u590d\u4f4d\u8f93\u5165\u662f\u540c\u6b65<\/strong>\u7684\uff0c\u5e94\u5c06\u8ba1\u6570\u5668<strong>\u590d\u4f4d\u81f31<\/strong><br \/> <img decoding=\"async\" src=\"https:\/\/img-blog.csdnimg.cn\/3cc7c5c451db4253a7abe041d2baf1ac.png\" =\"\" =\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" alt=\"HDLBits(\u516b)\u5b66\u4e60\u7b14\u8bb0\u2014\u2014Counters(\u8ba1\u6570\u5668) (https:\/\/mushiming.com\/)  \u7b2c3\u5f20\" title=\"HDLBits(\u516b)\u5b66\u4e60\u7b14\u8bb0\u2014\u2014Counters(\u8ba1\u6570\u5668)  \u7b2c3\u5f20-\u7a46\u4e16\u660e\u535a\u5ba2\" ><br \/> \u6b64\u9898\u7684\u533a\u522b\u5728\u4e8e\u8ba1\u6570\u5668\u7684\u521d\u503c\u4ece1\u5f00\u59cb\u3002<\/p>\n<pre class=\"language-java prettyprint linenums\"><code class=\"prism language-bash\">module top_module <span class=\"token punctuation\">(<\/span> input clk, input reset, output <span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span>:0<span class=\"token punctuation\">]<\/span> q <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> always @ <span class=\"token punctuation\">(<\/span>posedge clk <span class=\"token punctuation\">)<\/span>begin if<span class=\"token punctuation\">(<\/span>reset<span class=\"token punctuation\">)<\/span>begin q <span class=\"token operator\">&lt;=<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'b1; end else if(q &gt;= 4'<\/span>d10<span class=\"token punctuation\">)<\/span>begin q <span class=\"token operator\">&lt;=<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'b1; end else q &lt;= q+4'<\/span>b1<span class=\"token punctuation\">;<\/span> end endmodule <\/code><\/pre>\n<h2>Countslow<\/h2>\n<p>\u6784\u5efa\u4e00\u4e2a\u4ece 0 \u5230 9 \u8ba1\u6570\u7684\u5341\u8fdb\u5236\u8ba1\u6570\u5668\uff0c<strong>\u5468\u671f\u4e3a 10<\/strong>\u3002<strong>\u590d\u4f4d\u8f93\u5165\u662f\u540c\u6b65<\/strong>\u7684\uff0c\u5e94\u5c06\u8ba1\u6570\u5668<strong>\u590d\u4f4d\u81f30<\/strong>\u3002\u6211\u4eec\u5e0c\u671b\u80fd\u591f\u6682\u505c\u8ba1\u6570\u5668\uff0c\u800c\u4e0d\u662f\u603b\u662f\u5728\u6bcf\u4e2a\u65f6\u949f\u5468\u671f\u9012\u589e\uff0c\u56e0\u6b64 <strong>slowena<\/strong> \u8f93\u5165\u6307\u793a\u8ba1\u6570\u5668\u4f55\u65f6\u5e94\u8be5\u9012\u589e\u3002<br \/> <img decoding=\"async\" src=\"https:\/\/img-blog.csdnimg.cn\/cfdedfcc010b47aaadef6a35a1943db4.png\" =\"\" =\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" alt=\"HDLBits(\u516b)\u5b66\u4e60\u7b14\u8bb0\u2014\u2014Counters(\u8ba1\u6570\u5668) (https:\/\/mushiming.com\/)  \u7b2c4\u5f20\" title=\"HDLBits(\u516b)\u5b66\u4e60\u7b14\u8bb0\u2014\u2014Counters(\u8ba1\u6570\u5668)  \u7b2c4\u5f20-\u7a46\u4e16\u660e\u535a\u5ba2\" ><br \/> \u6b64\u9898\u76f8\u5f53\u4e8e\u52a0\u5165\u4e86\u4f7f\u80fd\u4fe1\u53f7<\/p>\n<pre class=\"language-java prettyprint linenums\"><code class=\"prism language-bash\">module top_module <span class=\"token punctuation\">(<\/span> input clk, input slowena, input reset, output <span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span>:0<span class=\"token punctuation\">]<\/span> q <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> always @ <span class=\"token punctuation\">(<\/span>posedge clk<span class=\"token punctuation\">)<\/span>begin if<span class=\"token punctuation\">(<\/span>reset<span class=\"token punctuation\">)<\/span> q <span class=\"token operator\">&lt;=<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'b0; else if(slowena)begin if(q == 4'<\/span>d9<span class=\"token punctuation\">)<\/span> q <span class=\"token operator\">&lt;=<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'b0; else q &lt;= q + 4'<\/span>b1<span class=\"token punctuation\">;<\/span> end <span class=\"token keyword\">else<\/span> q <span class=\"token operator\">&lt;=<\/span> q<span class=\"token punctuation\">;<\/span> end endmodule <\/code><\/pre>\n<h2>Count 1-12<\/h2>\n<p>\u8bbe\u8ba1\u5177\u6709\u4ee5\u4e0b\u8f93\u5165\u548c\u8f93\u51fa\u7684 <strong>1-12 \u8ba1\u6570\u5668<\/strong>\uff1a<\/p>\n<ul>\n<li class=\"task-list-item\"><input type=\"checkbox\" class=\"task-list-item-checkbox\" disabled> \u91cd\u7f6e<strong>\u540c\u6b65****\u9ad8\u7535\u5e73\u6709\u6548\u590d\u4f4d<\/strong>\uff0c\u5f3a\u5236\u8ba1\u6570\u5668\u4e3a <strong>1<\/strong><\/li>\n<li class=\"task-list-item\"><input type=\"checkbox\" class=\"task-list-item-checkbox\" disabled> <strong>enable\u4fe1\u53f7\u8bbe\u7f6e\u4e3a\u9ad8<\/strong>\u7535\u5e73\u4ee5\u4f7f\u8ba1\u6570\u5668\u8fd0\u884c<\/li>\n<li class=\"task-list-item\"><input type=\"checkbox\" class=\"task-list-item-checkbox\" disabled> \u65f6\u949f<strong>\u6b63\u8fb9\u6cbf<\/strong>\u89e6\u53d1\u65f6\u949f\u8f93\u5165 Q[3\uff1a0]\u8ba1\u6570\u5668\u7684<strong>\u8f93\u51fa<\/strong><\/li>\n<li class=\"task-list-item\"><input type=\"checkbox\" class=\"task-list-item-checkbox\" disabled> c_enable\u3001c_load\u3001c_d[3\uff1a0]\u8f93\u51fa\u5206\u522b\u662f\u8fdb\u5165\u5185\u90e8\u8ba1\u6570\u5668\u4f7f\u80fd\u3001\u8d1f\u8f7d\u548cd\u8f93\u5165\u7684\u4fe1\u53f7\u3002\u5b83\u4eec\u7684\u76ee\u7684\u662f\u5141\u8bb8\u68c0\u67e5\u8fd9\u4e9b\u4fe1\u53f7\u7684\u6b63\u786e\u6027\u3002<\/li>\n<\/ul>\n<p>\u60a8\u6709\u4ee5\u4e0b\u53ef\u7528\u7684\u7ec4\u4ef6\uff1a4 \u4f4d\u4e8c\u8fdb\u5236\u8ba1\u6570\u5668 \uff08count4\uff09<br \/> \u5982\u4e0b\uff0c\u5b83\u5177\u6709\u4f7f\u80fdenable\u548c\u540c\u6b65\u5e76\u884c\u52a0\u8f7d\u8f93\u5165load\uff08load\u7684\u4f18\u5148\u7ea7\u9ad8\u4e8eenable\uff09\u3002count4 \u6a21\u5757\u53ef\u5728\u7535\u8def\u4e2d\u5b9e\u4f8b\u5316\u5b83\u3002<\/p>\n<pre class=\"language-java prettyprint linenums\"><code class=\"prism language-bash\">module count4<span class=\"token punctuation\">(<\/span> input clk, input enable, input load, input <span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span>:0<span class=\"token punctuation\">]<\/span> d, output reg <span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span>:0<span class=\"token punctuation\">]<\/span> Q <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <\/code><\/pre>\n<p>\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre class=\"language-java prettyprint linenums\"><code class=\"prism language-bash\">module top_module <span class=\"token punctuation\">(<\/span> input clk, input reset, input enable, output <span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span>:0<span class=\"token punctuation\">]<\/span> Q, output c_enable, output c_load, output <span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span>:0<span class=\"token punctuation\">]<\/span> c_d <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> count4 the_counter <span class=\"token punctuation\">(<\/span>clk, c_enable, c_load, c_d, Q <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> assign c_enable <span class=\"token operator\">=<\/span> <span class=\"token builtin class-name\">enable<\/span><span class=\"token punctuation\">;<\/span> assign c_load <span class=\"token operator\">=<\/span> reset <span class=\"token operator\">|<\/span> <span class=\"token variable\"><span class=\"token punctuation\">((<\/span>Q <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span>'d12<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&amp;&amp;<\/span> <span class=\"token punctuation\">(<\/span>enable <span class=\"token operator\">==<\/span> <span class=\"token number\">1<\/span>'b1<span class=\"token punctuation\">))<\/span><\/span><span class=\"token punctuation\">;<\/span> assign c_d <span class=\"token operator\">=<\/span> c_load ? <span class=\"token number\">4<\/span><span class=\"token string\">'d1 : 4'<\/span>d0<span class=\"token punctuation\">;<\/span> endmodule <\/code><\/pre>\n<h2>Count 1000<\/h2>\n<p>\u4ece 1000 Hz \u65f6\u949f\u6d3e\u751f\u4e00\u4e2a 1 Hz \u4fe1\u53f7\uff08OneHertz\uff09(\u8ba1\u6570\u5230999)\uff0c\u8be5\u4fe1\u53f7\u53ef\u7528\u4e8e\u9a71\u52a8\u4e00\u7ec4\u5c0f\u65f6\/\u5206\u949f\/\u79d2\u8ba1\u6570\u5668\u7684 Enable \u4fe1\u53f7\uff0c\u4ee5\u521b\u5efa\u6570\u5b57\u6302\u949f\u3002<br \/> \u7531\u4e8e\u6211\u4eec\u5e0c\u671b\u65f6\u949f\u6bcf\u79d2\u8ba1\u6570\u4e00\u6b21\uff0c\u56e0\u6b64\u5fc5\u987b\u6bcf\u79d2\u7cbe\u786e\u5730\u7f6e\u4f4d\u4e00\u4e2a\u5468\u671f\u7684\u4e00\u8d6b\u5179\u4fe1\u53f7\u3002\u4f7f\u7528\u6a21 10 \uff08BCD\uff09 \u8ba1\u6570\u5668\u548c\u5c3d\u53ef\u80fd\u5c11\u7684\u5176\u4ed6\u95e8\u6784\u5efa\u5206\u9891\u5668\u3002\u540c\u65f6\u8f93\u51fa\u6765\u81ea\u60a8\u4f7f\u7528\u7684\u6bcf\u4e2aBCD\u8ba1\u6570\u5668\u7684\u4f7f\u80fd\u4fe1\u53f7\uff08c_enable[0]\u8868\u793a\u6700\u5feb\u7684\u8ba1\u6570\u5668\uff0cc_enable[2]\u8868\u793a\u6700\u6162\u7684\u8ba1\u6570\u5668\uff09\u3002<\/p>\n<p>\u4e3a\u60a8\u63d0\u4f9b\u4ee5\u4e0bBCD\u8ba1\u6570\u5668\u3002\u542f\u7528\u5fc5\u987b\u4e3a\u9ad8\u7535\u5e73\uff0c\u8ba1\u6570\u5668\u624d\u80fd\u8fd0\u884c\u3002\u590d\u4f4d\u662f\u540c\u6b65\u7684\uff0c\u5e76\u8bbe\u7f6e\u4e3a\u9ad8\u7535\u5e73\u4ee5\u5f3a\u5236\u8ba1\u6570\u5668\u4e3a\u96f6\u3002\u7535\u8def\u4e2d\u7684\u6240\u6709\u8ba1\u6570\u5668\u5fc5\u987b\u76f4\u63a5\u4f7f\u7528\u76f8\u540c\u7684 1000 Hz \u4fe1\u53f7\u3002<\/p>\n<pre class=\"language-java prettyprint linenums\"><code class=\"prism language-bash\">module bcdcount <span class=\"token punctuation\">(<\/span> input clk, input reset, input enable, output reg <span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span>:0<span class=\"token punctuation\">]<\/span> Q <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <\/code><\/pre>\n<pre><code class=\"prism language-bash\">module top_module <span class=\"token punctuation\">(<\/span> input clk, input reset, output OneHertz, output <span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span>:0<span class=\"token punctuation\">]<\/span> c_enable <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> wire<span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span>:0<span class=\"token punctuation\">]<\/span> one<span class=\"token punctuation\">;<\/span> wire<span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span>:0<span class=\"token punctuation\">]<\/span> ten<span class=\"token punctuation\">;<\/span> wire<span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span>:0<span class=\"token punctuation\">]<\/span> hundred<span class=\"token punctuation\">;<\/span> assign c_enable <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>one <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'d9 &amp;&amp; ten == 4'<\/span>d9, one <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'d9, 1'<\/span>b1<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span> assign OneHertz <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span>one <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'d9 &amp;&amp; ten == 4'<\/span>d9 <span class=\"token operator\">&amp;&amp;<\/span> hundred <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span>'d9<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> bcdcount u_counter0 <span class=\"token punctuation\">(<\/span>clk, reset, c_enable<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span>,one <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> bcdcount u_counter1 <span class=\"token punctuation\">(<\/span>clk, reset, c_enable<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span>,ten<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> bcdcount u_counter2 <span class=\"token punctuation\">(<\/span>clk, reset, c_enable<span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span>, hundred<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> endmodule <\/code><\/pre>\n<h2>Count bcd<\/h2>\n<p>\u6784\u5efa\u4e00\u4e2a 4 \u4f4d\u6570\u7684 BCD\uff08\u4e8c\u8fdb\u5236\u7f16\u7801\u7684\u5341\u8fdb\u5236\uff09\u8ba1\u6570\u5668\u3002\u6bcf\u4e2a\u5341\u8fdb\u5236\u6570\u5b57\u4f7f\u75284\u4f4d\u8fdb\u884c\u7f16\u7801\uff1aq[3\uff1a0]\u662f1\u4f4d\uff0cq[7\uff1a4]\u662f\u5341\u4f4d\uff0c\u4f9d\u6b64\u7c7b\u63a8\u3002\u5bf9\u4e8e\u6570\u5b57 [3\uff1a1]\uff0c\u8fd8\u8981\u8f93\u51fa\u4e00\u4e2a<strong>\u4f7f\u80fd\u4fe1\u53f7<\/strong>\uff0c\u6307\u793a\u4e0a\u4e09\u4f4d\u6570\u5b57\u4e2d\u7684\u6bcf\u4e00\u4f4d\u4f55\u65f6\u5e94\u9012\u589e\u3002<img decoding=\"async\" src=\"https:\/\/img-blog.csdnimg.cn\/e9165edeea0c453c888aa1e69720d665.png\" =\"\" =\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" alt=\"HDLBits(\u516b)\u5b66\u4e60\u7b14\u8bb0\u2014\u2014Counters(\u8ba1\u6570\u5668) (https:\/\/mushiming.com\/)  \u7b2c5\u5f20\" title=\"HDLBits(\u516b)\u5b66\u4e60\u7b14\u8bb0\u2014\u2014Counters(\u8ba1\u6570\u5668)  \u7b2c5\u5f20-\u7a46\u4e16\u660e\u535a\u5ba2\" ><br \/> \u5efa\u8bae\u5c06if else\u7684\u6240\u6709\u60c5\u51b5\u7684\u8f93\u51fa\u90fd\u7ed9\u51fa\uff0c\u907f\u514d\u9501\u5b58\u5668\u7684\u751f\u6210<\/p>\n<pre><code class=\"prism language-bash\">module top_module<span class=\"token punctuation\">(<\/span> input clk, input reset, \/\/ Synchronous active-high reset output <span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span>:1<span class=\"token punctuation\">]<\/span> ena, output <span class=\"token punctuation\">[<\/span><span class=\"token number\">15<\/span>:0<span class=\"token punctuation\">]<\/span> q <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> reg <span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span>:0<span class=\"token punctuation\">]<\/span> ones<span class=\"token punctuation\">;<\/span> reg <span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span>:0<span class=\"token punctuation\">]<\/span> tens<span class=\"token punctuation\">;<\/span> reg <span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span>:0<span class=\"token punctuation\">]<\/span> hundreds<span class=\"token punctuation\">;<\/span> reg <span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span>:0<span class=\"token punctuation\">]<\/span> thousands<span class=\"token punctuation\">;<\/span> \/\/\u4e2a\u4f4d\u8ba1\u6570\u5668 always @ <span class=\"token punctuation\">(<\/span>posedge clk<span class=\"token punctuation\">)<\/span>begin if<span class=\"token punctuation\">(<\/span>reset<span class=\"token punctuation\">)<\/span> ones <span class=\"token operator\">&lt;=<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'b0; else if(ones == 4'<\/span>d9<span class=\"token punctuation\">)<\/span> ones <span class=\"token operator\">&lt;=<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'b0; else ones &lt;= ones + 4'<\/span>b1<span class=\"token punctuation\">;<\/span> end \/\/\u5341\u4f4d\u8ba1\u6570\u5668 always @ <span class=\"token punctuation\">(<\/span>posedge clk<span class=\"token punctuation\">)<\/span>begin if<span class=\"token punctuation\">(<\/span>reset<span class=\"token punctuation\">)<\/span> tens <span class=\"token operator\">&lt;=<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'b0; else if(ones == 4'<\/span>d9 <span class=\"token operator\">&amp;&amp;<\/span> tens <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'d9 ) tens &lt;= 4'<\/span>b0<span class=\"token punctuation\">;<\/span> <span class=\"token keyword\">else<\/span> if<span class=\"token punctuation\">(<\/span>ones <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'d9) tens &lt;= tens + 4'<\/span>b1<span class=\"token punctuation\">;<\/span> <span class=\"token keyword\">else<\/span> tens <span class=\"token operator\">&lt;=<\/span> tens<span class=\"token punctuation\">;<\/span> end \/\/\u767e\u4f4d\u8ba1\u6570\u5668 always @ <span class=\"token punctuation\">(<\/span>posedge clk<span class=\"token punctuation\">)<\/span>begin if<span class=\"token punctuation\">(<\/span>reset<span class=\"token punctuation\">)<\/span> hundreds <span class=\"token operator\">&lt;=<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'b0; else if(ones == 4'<\/span>d9 <span class=\"token operator\">&amp;&amp;<\/span> tens <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'d9 &amp;&amp; hundreds == 4'<\/span>d9 <span class=\"token punctuation\">)<\/span> hundreds <span class=\"token operator\">&lt;=<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'b0; else if(tens == 4'<\/span>d9 <span class=\"token operator\">&amp;&amp;<\/span> ones <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'d9) hundreds &lt;= hundreds + 4'<\/span>b1<span class=\"token punctuation\">;<\/span> <span class=\"token keyword\">else<\/span> hundreds <span class=\"token operator\">&lt;=<\/span> hundreds <span class=\"token punctuation\">;<\/span> end \/\/\u5343\u4f4d\u8ba1\u6570\u5668 always @ <span class=\"token punctuation\">(<\/span>posedge clk<span class=\"token punctuation\">)<\/span>begin if<span class=\"token punctuation\">(<\/span>reset<span class=\"token punctuation\">)<\/span> thousands <span class=\"token operator\">&lt;=<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'b0; else if(ones == 4'<\/span>d9<span class=\"token operator\">&amp;&amp;<\/span> tens <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'d9 &amp;&amp; hundreds == 4'<\/span>d9 <span class=\"token operator\">&amp;&amp;<\/span> thousands <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'d9 ) thousands &lt;= 4'<\/span>b0<span class=\"token punctuation\">;<\/span> <span class=\"token keyword\">else<\/span> if<span class=\"token punctuation\">(<\/span>hundreds <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'d9 &amp;&amp; tens == 4'<\/span>d9 <span class=\"token operator\">&amp;&amp;<\/span> ones <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'d9) thousands &lt;= thousands + 4'<\/span>b1<span class=\"token punctuation\">;<\/span> <span class=\"token keyword\">else<\/span> thousands <span class=\"token operator\">&lt;=<\/span> thousands<span class=\"token punctuation\">;<\/span> end \/\/\u8f93\u51faq\u4e3a\u56db\u4e2a\u56db\u4f4d\u7684\u4e2a\u4f4d\uff0c\u5341\u4f4d\uff0c\u767e\u4f4d\uff0c\u5343\u4f4d\u62fc\u63a5\uff0c\u4e14\u9898\u76ee\u7ed9\u51fa\u662f\u4ece\u4f4e\u4f4d\u5230\u9ad8\u4f4d assign q <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>thousands,hundreds,tens,ones<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span> \/\/\u4f7f\u80fd\u4fe1\u53f7\u6709\u6548 assign ena<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span>ones <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'d9 ) ? 1'<\/span>b1 <span class=\"token builtin class-name\">:<\/span> <span class=\"token number\">1<\/span><span class=\"token string\">'b0; assign ena[2] = ((ones == 4'<\/span>d9<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&amp;&amp;<\/span> <span class=\"token punctuation\">(<\/span>tens <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'d9 ) ) ? 1'<\/span>b1 <span class=\"token builtin class-name\">:<\/span> <span class=\"token number\">1<\/span><span class=\"token string\">'b0; assign ena[3] = ((ones == 4'<\/span>d9<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&amp;&amp;<\/span> <span class=\"token punctuation\">(<\/span>tens <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'d9) &amp;&amp;( hundreds == 4'<\/span>d9 <span class=\"token punctuation\">))<\/span> ? <span class=\"token number\">1<\/span><span class=\"token string\">'b1 : 1'<\/span>b0<span class=\"token punctuation\">;<\/span> endmodule <\/code><\/pre>\n<h2>Count clock<\/h2>\n<p>\u521b\u5efa\u4e00\u7ec4\u9002\u5408\u7528\u4f5c 12 \u5c0f\u65f6\u65f6\u949f\u4f7f\u7528\u7684\u7684\u8ba1\u6570\u5668\uff08\u5e26 am\/pm \u6307\u793a\u5668\uff09\u3002\u60a8\u7684\u8ba1\u6570\u5668\u7531clk\u9a71\u52a8\uff0c\u65f6\u949fclk\u6bcf\u589e\u52a0\u4e00\u6b21\uff0c\uff08\u5373\u6bcf\u589e\u52a0\u79d2\u4e00\u6b21\uff09\uff0c\u5c31\u4f1a\u5728ena\u4e0a\u53d1\u51fa\u8109\u51b2\uff081\uff09\u3002<\/p>\n<p>\u590d\u4f4d\u4fe1\u53f7\u53ef\u5c06\u65f6\u949f\u91cd\u7f6e\u4e3a \u4e2d\u534812\u65f6\uff0812\uff1a00 AM\uff09\u3002\u4e0a\u5348pm \u4e3a 0\uff08AM\uff09\uff0c\u4e0b\u5348pm \u4e3a 1\u3002hh\u3001mm \u548c ss \u662f\u4e24\u4e2a BCD\uff08\u4e8c\u8fdb\u5236\u7f16\u7801\u5341\u8fdb\u5236\uff09\u6570\u5b57\uff0c\u5206\u522b\u8868\u793a\u5c0f\u65f6 \uff0801-12\uff09\u3001\u5206\u949f \uff0800-59\uff09 \u548c\u79d2 \uff0800-59\uff09\u3002<\/p>\n<p>\u590d\u4f4d\u4fe1\u53f7\u7684\u4f18\u5148\u7ea7\u9ad8\u4e8eena\uff0c\u5373\u4f7fena\u65e0\u6548\uff0c\u4e5f\u53ef\u80fd\u53d1\u751f\u590d\u4f4d\u3002<\/p>\n<p>\u4ee5\u4e0b\u65f6\u5e8f\u56fe\u663e\u793a\u4e86\u4eceAM 11\uff1a59\uff1a59 \u5230PM 12\uff1a00\uff1a00 \u7684\u7ffb\u8f6c\u884c\u4e3a\u4ee5\u53ca<strong>\u540c\u6b65\u590d\u4f4d<\/strong>\u548c\u4f7f\u80fd\u884c\u4e3a\u3002<br \/> <img decoding=\"async\" src=\"https:\/\/img-blog.csdnimg.cn\/f4bc86017285400a850e4ee3107f3e98.png\" =\"\" =\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" alt=\"HDLBits(\u516b)\u5b66\u4e60\u7b14\u8bb0\u2014\u2014Counters(\u8ba1\u6570\u5668) (https:\/\/mushiming.com\/)  \u7b2c6\u5f20\" title=\"HDLBits(\u516b)\u5b66\u4e60\u7b14\u8bb0\u2014\u2014Counters(\u8ba1\u6570\u5668)  \u7b2c6\u5f20-\u7a46\u4e16\u660e\u535a\u5ba2\" ><br \/> \u5176\u4e2d ss mm hh \u5747\u5305\u542b\u4e2a\u4f4d\u548c\u5341\u4f4d\uff0c\u56e0\u6b64\u5bf9\u4e8e\u8fd9\u4e09\u4e2a\u4fe1\u53f7\u6211\u4eec\u8981\u8bbe\u8ba1\u516d\u4e2a\u8ba1\u6570\u5668\u3002<\/p>\n<pre><code class=\"prism language-bash\">module top_module<span class=\"token punctuation\">(<\/span> input clk, input reset, input ena, output pm, output <span class=\"token punctuation\">[<\/span><span class=\"token number\">7<\/span>:0<span class=\"token punctuation\">]<\/span> hh, output <span class=\"token punctuation\">[<\/span><span class=\"token number\">7<\/span>:0<span class=\"token punctuation\">]<\/span> mm, output <span class=\"token punctuation\">[<\/span><span class=\"token number\">7<\/span>:0<span class=\"token punctuation\">]<\/span> ss<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> reg pm_temp<span class=\"token punctuation\">;<\/span> reg <span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span>:0<span class=\"token punctuation\">]<\/span> ss_ones<span class=\"token punctuation\">;<\/span> \/\/ SS\u4e2a\u4f4d\u7684\u6682\u5b58 reg <span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span>:0<span class=\"token punctuation\">]<\/span> ss_tens<span class=\"token punctuation\">;<\/span> \/\/ SS\u5341\u4f4d\u7684\u6682\u5b58 reg <span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span>:0<span class=\"token punctuation\">]<\/span> mm_ones<span class=\"token punctuation\">;<\/span> \/\/ mm\u4e2a\u4f4d\u7684\u6682\u5b58 reg <span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span>:0<span class=\"token punctuation\">]<\/span> mm_tens<span class=\"token punctuation\">;<\/span> \/\/ mm\u5341\u4f4d\u7684\u6682\u5b58 reg <span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span>:0<span class=\"token punctuation\">]<\/span> hh_ones<span class=\"token punctuation\">;<\/span> \/\/ hh\u4e2a\u4f4d\u7684\u6682\u5b58 reg <span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span>:0<span class=\"token punctuation\">]<\/span> hh_tens<span class=\"token punctuation\">;<\/span> \/\/ hh\u5341\u4f4d\u7684\u6682\u5b58 wire add_ss_ones<span class=\"token punctuation\">;<\/span> wire end_ss_ones<span class=\"token punctuation\">;<\/span> wire add_ss_tens<span class=\"token punctuation\">;<\/span> wire end_ss_tens<span class=\"token punctuation\">;<\/span> wire add_mm_ones<span class=\"token punctuation\">;<\/span> wire end_mm_ones<span class=\"token punctuation\">;<\/span> wire add_mm_tens<span class=\"token punctuation\">;<\/span> wire end_mm_tens<span class=\"token punctuation\">;<\/span> wire add_hh_ones<span class=\"token punctuation\">;<\/span> wire end_hh_ones_0<span class=\"token punctuation\">;<\/span> wire end_hh_ones_1<span class=\"token punctuation\">;<\/span> wire add_hh_tens<span class=\"token punctuation\">;<\/span> wire end_hh_tens_0<span class=\"token punctuation\">;<\/span> wire end_hh_tens_1<span class=\"token punctuation\">;<\/span> wire pm_ding<span class=\"token punctuation\">;<\/span> assign add_ss_ones <span class=\"token operator\">=<\/span> ena<span class=\"token punctuation\">;<\/span> assign end_ss_ones <span class=\"token operator\">=<\/span> add_ss_ones <span class=\"token operator\">&amp;&amp;<\/span> <span class=\"token punctuation\">(<\/span>ss_ones <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'d9); always @(posedge clk)begin if(reset)begin ss_ones &lt;= 4'<\/span>b0<span class=\"token punctuation\">;<\/span> end <span class=\"token keyword\">else<\/span> if<span class=\"token punctuation\">(<\/span>add_ss_ones<span class=\"token punctuation\">)<\/span>begin if<span class=\"token punctuation\">(<\/span>end_ss_ones<span class=\"token punctuation\">)<\/span>begin ss_ones <span class=\"token operator\">&lt;=<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'b0; end else begin ss_ones &lt;= ss_ones + 4'<\/span>b1<span class=\"token punctuation\">;<\/span> end end <span class=\"token keyword\">else<\/span> ss_ones <span class=\"token operator\">&lt;=<\/span> ss_ones<span class=\"token punctuation\">;<\/span> end assign add_ss_tens <span class=\"token operator\">=<\/span> end_ss_ones<span class=\"token punctuation\">;<\/span> assign end_ss_tens <span class=\"token operator\">=<\/span> add_ss_tens <span class=\"token operator\">&amp;&amp;<\/span> <span class=\"token punctuation\">(<\/span>ss_tens <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'d5); always @(posedge clk)begin if(reset)begin ss_tens &lt;= 4'<\/span>b0<span class=\"token punctuation\">;<\/span> end <span class=\"token keyword\">else<\/span> if<span class=\"token punctuation\">(<\/span>add_ss_tens<span class=\"token punctuation\">)<\/span>begin if<span class=\"token punctuation\">(<\/span>end_ss_tens<span class=\"token punctuation\">)<\/span>begin ss_tens <span class=\"token operator\">&lt;=<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'b0; end else begin ss_tens &lt;= ss_tens + 4'<\/span>b1<span class=\"token punctuation\">;<\/span> end end <span class=\"token keyword\">else<\/span> ss_tens <span class=\"token operator\">&lt;=<\/span> ss_tens<span class=\"token punctuation\">;<\/span> end assign add_mm_ones <span class=\"token operator\">=<\/span> end_ss_tens<span class=\"token punctuation\">;<\/span> assign end_mm_ones <span class=\"token operator\">=<\/span> add_mm_ones <span class=\"token operator\">&amp;&amp;<\/span> <span class=\"token punctuation\">(<\/span>mm_ones <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'d9); always @(posedge clk)begin if(reset)begin mm_ones &lt;= 4'<\/span>b0<span class=\"token punctuation\">;<\/span> end <span class=\"token keyword\">else<\/span> if<span class=\"token punctuation\">(<\/span>add_mm_ones<span class=\"token punctuation\">)<\/span>begin if<span class=\"token punctuation\">(<\/span>end_mm_ones<span class=\"token punctuation\">)<\/span>begin mm_ones <span class=\"token operator\">&lt;=<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'b0; end else begin mm_ones &lt;= mm_ones + 4'<\/span>b1<span class=\"token punctuation\">;<\/span> end end <span class=\"token keyword\">else<\/span> mm_ones <span class=\"token operator\">&lt;=<\/span> mm_ones<span class=\"token punctuation\">;<\/span> end assign add_mm_tens <span class=\"token operator\">=<\/span> end_mm_ones<span class=\"token punctuation\">;<\/span> assign end_mm_tens <span class=\"token operator\">=<\/span> add_mm_tens <span class=\"token operator\">&amp;&amp;<\/span> <span class=\"token punctuation\">(<\/span>mm_tens <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'d5); always @(posedge clk)begin if(reset)begin mm_tens &lt;= 4'<\/span>b0<span class=\"token punctuation\">;<\/span> end <span class=\"token keyword\">else<\/span> if<span class=\"token punctuation\">(<\/span>add_mm_tens<span class=\"token punctuation\">)<\/span>begin if<span class=\"token punctuation\">(<\/span>end_mm_tens<span class=\"token punctuation\">)<\/span>begin mm_tens <span class=\"token operator\">&lt;=<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'b0; end else begin mm_tens &lt;= mm_tens + 4'<\/span>b1<span class=\"token punctuation\">;<\/span> end end <span class=\"token keyword\">else<\/span> mm_tens <span class=\"token operator\">&lt;=<\/span> mm_tens<span class=\"token punctuation\">;<\/span> end assign add_hh_ones <span class=\"token operator\">=<\/span> end_mm_tens<span class=\"token punctuation\">;<\/span> assign end_hh_ones_0 <span class=\"token operator\">=<\/span> add_hh_ones <span class=\"token operator\">&amp;&amp;<\/span> <span class=\"token punctuation\">(<\/span>hh_ones <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'d9); assign end_hh_ones_1 = add_hh_ones &amp;&amp; ((hh_ones == 4'<\/span>d2<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&amp;&amp;<\/span> <span class=\"token punctuation\">(<\/span>hh_tens <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'d1)); always @(posedge clk)begin if(reset)begin hh_ones &lt;= 4'<\/span>d2<span class=\"token punctuation\">;<\/span> end <span class=\"token keyword\">else<\/span> if<span class=\"token punctuation\">(<\/span>add_hh_ones<span class=\"token punctuation\">)<\/span>begin if<span class=\"token punctuation\">(<\/span>end_hh_ones_0<span class=\"token punctuation\">)<\/span>begin hh_ones <span class=\"token operator\">&lt;=<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'b0; end else if(end_hh_ones_1)begin hh_ones &lt;= 4'<\/span>b1<span class=\"token punctuation\">;<\/span> end <span class=\"token keyword\">else<\/span> begin hh_ones <span class=\"token operator\">&lt;=<\/span> hh_ones+4<span class=\"token string\">'b1; end end else hh_ones &lt;= hh_ones ; end assign add_hh_tens = end_mm_tens; assign end_hh_tens_0 = add_hh_tens &amp;&amp; end_hh_ones_1; assign end_hh_tens_1 = add_hh_tens &amp;&amp; end_hh_ones_0; always @(posedge clk)begin if(reset)begin hh_tens &lt;= 4'<\/span>b1<span class=\"token punctuation\">;<\/span> end <span class=\"token keyword\">else<\/span> if<span class=\"token punctuation\">(<\/span>add_hh_tens<span class=\"token punctuation\">)<\/span>begin if<span class=\"token punctuation\">(<\/span>end_hh_tens_0<span class=\"token punctuation\">)<\/span>begin hh_tens <span class=\"token operator\">&lt;=<\/span> <span class=\"token number\">4<\/span><span class=\"token string\">'b0; end else if(end_hh_tens_1)begin hh_tens &lt;= hh_tens + 4'<\/span>b1<span class=\"token punctuation\">;<\/span> end end <span class=\"token keyword\">else<\/span> hh_tens <span class=\"token operator\">&lt;=<\/span> hh_tens <span class=\"token punctuation\">;<\/span> end always@<span class=\"token punctuation\">(<\/span>posedge clk<span class=\"token punctuation\">)<\/span>begin if<span class=\"token punctuation\">(<\/span>reset<span class=\"token punctuation\">)<\/span>begin pm_temp <span class=\"token operator\">&lt;=<\/span> <span class=\"token number\">1<\/span><span class=\"token string\">'b0; end else if(pm_ding)begin pm_temp &lt;= ~pm_temp; end else pm_temp &lt;= pm_temp ; end assign pm_ding = hh_tens == 4'<\/span>d1 <span class=\"token operator\">&amp;&amp;<\/span> hh_ones <span class=\"token operator\">==<\/span> <span class=\"token number\">4<\/span>'d1 <span class=\"token operator\">&amp;&amp;<\/span> end_mm_tens<span class=\"token punctuation\">;<\/span> assign ss <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>ss_tens, ss_ones<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span> assign mm <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>mm_tens, mm_ones<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span> assign hh <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>hh_tens, hh_ones<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span> assign pm <span class=\"token operator\">=<\/span> pm_temp<span class=\"token punctuation\">;<\/span> endmodule <\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"HDLBits(\u516b)\u5b66\u4e60\u7b14\u8bb0\u2014\u2014Counters(\u8ba1\u6570\u5668)\u6587\u7ae0\u76ee\u5f55Count15Count10Count1to10CountslowCount1-12Count1000CountbcdCountclockCou...","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"_links":{"self":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts\/4878"}],"collection":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/comments?post=4878"}],"version-history":[{"count":0,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts\/4878\/revisions"}],"wp:attachment":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/media?parent=4878"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/categories?post=4878"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/tags?post=4878"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}