{"id":531,"date":"2025-02-17T15:36:18","date_gmt":"2025-02-17T07:36:18","guid":{"rendered":"http:\/\/www.hanhhsir.cn\/?p=531"},"modified":"2025-02-18T17:04:40","modified_gmt":"2025-02-18T09:04:40","slug":"%e5%8f%8d%e5%90%91%e5%ad%a6%e4%b9%a0uart%e4%b8%b2%e5%8f%a3%e9%80%9a%e4%bf%a1","status":"publish","type":"post","link":"http:\/\/www.hanhhsir.cn\/index.php\/2025\/02\/17\/%e5%8f%8d%e5%90%91%e5%ad%a6%e4%b9%a0uart%e4%b8%b2%e5%8f%a3%e9%80%9a%e4%bf%a1\/","title":{"rendered":"\u53cd\u5411\u5b66\u4e60Uart\u4e32\u53e3\u901a\u4fe1"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"531\" class=\"elementor elementor-531\">\n\t\t\t\t<div data-marvy_enable_drop_animation=\"false\" data-marvy_enable_fancy_rotate=\"false\" data-marvy_enable_flying_object=\"false\" data-marvy_enable_ripples_animation=\"false\" data-marvy_enable_waves_animation=\"false\" data-marvy_enable_rings_animation=\"false\" data-marvy_enable_topology_animation=\"false\" data-marvy_enable_gradient_animation=\"false\" data-marvy_enable_snow_animation=\"false\" data-marvy_enable_firework_animation=\"false\" data-marvy_enable_cloud_animation=\"false\" class=\"elementor-element elementor-element-7e41b39 e-flex e-con-boxed e-con e-parent\" data-id=\"7e41b39\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5af84a9 elementor-widget elementor-widget-text-editor\" data-id=\"5af84a9\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<h3><strong>\u4e00\u3001Uart\u4e32\u53e3\u901a\u4fe1\u7684\u57fa\u672c\u539f\u7406<\/strong><\/h3><div><strong>\u00a0<\/strong><\/div><p data-start=\"190\" data-end=\"326\"><strong data-start=\"190\" data-end=\"198\">\u00a0 \u00a0 \u00a0 \u00a0 \u00a0UART<\/strong>\uff08Universal Asynchronous Receiver\/Transmitter\uff0c\u901a\u7528\u5f02\u6b65\u6536\u53d1\u4f20\u8f93\u5668\uff09\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u4e32\u884c\u901a\u4fe1\u534f\u8bae\uff0c\u7528\u4e8e\u5728\u8bbe\u5907\u4e4b\u95f4\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u3002\u4e0e\u5e76\u884c\u901a\u4fe1\u65b9\u5f0f\u4e0d\u540c\uff0c\u4e32\u53e3\u901a\u4fe1\u901a\u8fc7\u4e00\u4e2a\u4fe1\u53f7\u7ebf\uff08TX\u3001RX\uff09\u4f9d\u6b21\u4f20\u8f93\u6570\u636e\u4f4d\uff0c\u51cf\u5c11\u4e86\u7ebf\u8def\u7684\u6570\u91cf\u3002<\/p><h4 data-start=\"328\" data-end=\"344\">UART\u7684\u57fa\u672c\u5de5\u4f5c\u539f\u7406<\/h4><ol data-start=\"346\" data-end=\"887\"><li data-start=\"346\" data-end=\"435\"><p data-start=\"349\" data-end=\"435\"><strong data-start=\"349\" data-end=\"359\">\u6570\u636e\u4f20\u8f93\u65b9\u5f0f<\/strong><br data-start=\"359\" data-end=\"362\" \/>UART\u662f\u4e00\u79cd<strong data-start=\"372\" data-end=\"378\">\u5f02\u6b65<\/strong>\u901a\u4fe1\u534f\u8bae\u3002\u8fd9\u610f\u5473\u7740\u6570\u636e\u4f20\u8f93\u4e0d\u9700\u8981\u65f6\u949f\u4fe1\u53f7\u7684\u540c\u6b65\uff0c\u800c\u662f\u901a\u8fc7\u6570\u636e\u4f4d\u7684<span style=\"color: #ff6600;\">\u8d77\u59cb\u4f4d\u3001\u6570\u636e\u4f4d\u3001\u505c\u6b62\u4f4d<\/span>\u7b49\u6765\u786e\u4fdd\u4f20\u8f93\u7684\u987a\u5e8f\u548c\u53ef\u9760\u6027\u3002<\/p><\/li><li data-start=\"437\" data-end=\"543\"><p data-start=\"440\" data-end=\"543\"><strong data-start=\"440\" data-end=\"451\">\u4f20\u8f93\u6570\u636e\u7684\u7ec4\u6210<\/strong><br data-start=\"451\" data-end=\"454\" \/>\u6bcf\u6b21\u901a\u8fc7UART\u53d1\u9001\u7684\u6570\u636e\uff0c\u90fd\u4f1a\u88ab\u5206\u4e3a\u82e5\u5e72\u4f4d\uff08\u901a\u5e38\u662f8\u4f4d\uff09\u3002\u8fd98\u4f4d\u6570\u636e\u901a\u8fc7\u4e00\u6761\u6570\u636e\u7ebf\uff08TX\u7ebf\uff09\u53d1\u9001\u5230\u63a5\u6536\u8bbe\u5907\u3002\u63a5\u6536\u7aef\u4f1a\u6309\u7167\u76f8\u540c\u7684\u683c\u5f0f\uff08\u4f4d\u3001\u5f00\u59cb\u4f4d\u3001\u505c\u6b62\u4f4d\uff09\u6765\u63a5\u6536\u548c\u89e3\u6790\u6570\u636e\u3002<\/p><\/li><li data-start=\"545\" data-end=\"770\"><p data-start=\"548\" data-end=\"580\"><strong data-start=\"548\" data-end=\"557\">\u6570\u636e\u5e27\u7ed3\u6784<\/strong><br data-start=\"557\" data-end=\"560\" \/>\u6bcf\u4e2a\u6570\u636e\u5e27\u901a\u5e38\u7531\u4ee5\u4e0b\u51e0\u4e2a\u90e8\u5206\u7ec4\u6210\uff1a<\/p><ul data-start=\"584\" data-end=\"732\"><li data-start=\"584\" data-end=\"616\"><strong data-start=\"586\" data-end=\"593\">\u8d77\u59cb\u4f4d<\/strong>\uff1a\u8868\u793a\u6570\u636e\u4f20\u8f93\u7684\u5f00\u59cb\uff0c\u901a\u5e38\u4e3a\u4e00\u4e2a<span style=\"color: #ff6600;\">\u4f4e\u7535\u5e73<\/span>\u3002<\/li><li data-start=\"620\" data-end=\"647\"><strong data-start=\"622\" data-end=\"629\">\u6570\u636e\u4f4d<\/strong>\uff1a<span style=\"color: #ff6600;\">\u5b9e\u9645\u4f20\u8f93\u7684\u6570\u636e\uff0c\u5e38\u89c1\u4e3a8\u4f4d<\/span>\u3002<\/li><li data-start=\"651\" data-end=\"692\"><strong data-start=\"653\" data-end=\"666\">\u5947\u5076\u6821\u9a8c\u4f4d\uff08\u53ef\u9009\uff09<\/strong>\uff1a\u7528\u4e8e\u9519\u8bef\u68c0\u6d4b\uff0c\u5224\u65ad\u662f\u5426\u63a5\u6536\u5230\u6b63\u786e\u7684\u6570\u636e\u3002<\/li><li data-start=\"696\" data-end=\"732\"><strong data-start=\"698\" data-end=\"705\">\u505c\u6b62\u4f4d<\/strong>\uff1a\u8868\u793a\u6570\u636e\u4f20\u8f93\u7684\u7ed3\u675f\uff0c\u901a\u5e38\u4e3a1\u4f4d<span style=\"color: #ff6600;\">\u9ad8\u7535\u5e73<\/span>\u3002<\/li><li data-start=\"696\" data-end=\"732\"><span style=\"color: #993366;\"><strong>\u4e0b\u56fe\u4e3a\u6ca1\u6709\u5947\u5076\u6821\u9a8c\u4f4d\u7684\u6570\u636e\u5e27\u683c\u5f0f<\/strong><\/span><\/li><\/ul><\/li><\/ol>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-marvy_enable_drop_animation=\"false\" data-marvy_enable_fancy_rotate=\"false\" data-marvy_enable_flying_object=\"false\" data-marvy_enable_ripples_animation=\"false\" data-marvy_enable_waves_animation=\"false\" data-marvy_enable_rings_animation=\"false\" data-marvy_enable_topology_animation=\"false\" data-marvy_enable_gradient_animation=\"false\" data-marvy_enable_snow_animation=\"false\" data-marvy_enable_firework_animation=\"false\" data-marvy_enable_cloud_animation=\"false\" class=\"elementor-element elementor-element-ce1b37d e-flex e-con-boxed e-con e-parent\" data-id=\"ce1b37d\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f442839 elementor-widget elementor-widget-image\" data-id=\"f442839\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"520\" height=\"232\" src=\"http:\/\/www.hanhhsir.cn\/wp-content\/uploads\/2024\/11\/a9848cfb68103f73f9ac5ff3f785ecb9-1-scaled-e1739777901470-1024x457.jpg\" class=\"attachment-large size-large wp-image-483\" alt=\"\" srcset=\"http:\/\/www.hanhhsir.cn\/wp-content\/uploads\/2024\/11\/a9848cfb68103f73f9ac5ff3f785ecb9-1-scaled-e1739777901470-1024x457.jpg 1024w, http:\/\/www.hanhhsir.cn\/wp-content\/uploads\/2024\/11\/a9848cfb68103f73f9ac5ff3f785ecb9-1-scaled-e1739777901470-300x134.jpg 300w, http:\/\/www.hanhhsir.cn\/wp-content\/uploads\/2024\/11\/a9848cfb68103f73f9ac5ff3f785ecb9-1-scaled-e1739777901470-768x343.jpg 768w, http:\/\/www.hanhhsir.cn\/wp-content\/uploads\/2024\/11\/a9848cfb68103f73f9ac5ff3f785ecb9-1-scaled-e1739777901470-1536x685.jpg 1536w, http:\/\/www.hanhhsir.cn\/wp-content\/uploads\/2024\/11\/a9848cfb68103f73f9ac5ff3f785ecb9-1-scaled-e1739777901470-2048x914.jpg 2048w, http:\/\/www.hanhhsir.cn\/wp-content\/uploads\/2024\/11\/a9848cfb68103f73f9ac5ff3f785ecb9-1-scaled-e1739777901470-1140x509.jpg 1140w\" sizes=\"(max-width: 520px) 100vw, 520px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-94de5c7 elementor-widget elementor-widget-text-editor\" data-id=\"94de5c7\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p data-start=\"775\" data-end=\"887\"><strong data-start=\"775\" data-end=\"786\">4. \u5168\u53cc\u5de5\u4e0e\u534a\u53cc\u5de5<\/strong><br data-start=\"786\" data-end=\"789\" \/>\u00a0 \u00a0 \u00a0 \u00a0 UART\u901a\u4fe1\u652f\u6301<strong data-start=\"800\" data-end=\"807\">\u5168\u53cc\u5de5<\/strong>\uff08Full Duplex\uff09\u548c<strong data-start=\"821\" data-end=\"828\">\u534a\u53cc\u5de5<\/strong>\uff08Half Duplex\uff09\u4e24\u79cd\u6a21\u5f0f\u3002\u5728\u5168\u53cc\u5de5\u6a21\u5f0f\u4e0b\uff0c\u53d1\u9001\u548c\u63a5\u6536\u53ef\u4ee5\u540c\u65f6\u8fdb\u884c\uff1b\u800c\u5728\u534a\u53cc\u5de5\u6a21\u5f0f\u4e0b\uff0c\u53d1\u9001\u548c\u63a5\u6536\u662f\u4ea4\u66ff\u8fdb\u884c\u7684\u3002<\/p><h4 data-start=\"889\" data-end=\"903\">UART\u7684\u5de5\u4f5c\u6d41\u7a0b<\/h4><ol data-start=\"905\" data-end=\"1091\"><li data-start=\"905\" data-end=\"988\"><p data-start=\"908\" data-end=\"988\"><strong data-start=\"908\" data-end=\"915\">\u53d1\u9001\u7aef<\/strong><br data-start=\"915\" data-end=\"918\" \/>\u5728\u53d1\u9001\u7aef\uff0c\u6570\u636e\u901a\u8fc7TX\uff08Transmit\uff09\u7ebf\u4ee5\u4e32\u884c\u5f62\u5f0f\u53d1\u9001\u51fa\u53bb\u3002\u6570\u636e\u5728\u4f20\u8f93\u65f6\u4f1a\u88ab\u5207\u5206\u6210\u4f4d\uff0c\u5148\u53d1\u9001\u8d77\u59cb\u4f4d\uff0c\u518d\u53d1\u9001\u6570\u636e\u4f4d\uff0c\u6700\u540e\u53d1\u9001\u505c\u6b62\u4f4d\u3002<\/p><\/li><li data-start=\"990\" data-end=\"1091\"><p data-start=\"993\" data-end=\"1091\"><strong data-start=\"993\" data-end=\"1000\">\u63a5\u6536\u7aef<\/strong><br data-start=\"1000\" data-end=\"1003\" \/>\u63a5\u6536\u7aef\u901a\u8fc7RX\uff08Receive\uff09\u7ebf\u63a5\u6536\u5230\u6570\u636e\u3002\u5f53\u63a5\u6536\u7aef\u63a5\u6536\u5230\u6570\u636e\u65f6\uff0c\u5b83\u4f1a\u9996\u5148\u8bfb\u53d6\u8d77\u59cb\u4f4d\uff0c\u7136\u540e\u9010\u4f4d\u63a5\u6536\u6570\u636e\u4f4d\uff0c\u6700\u540e\u68c0\u67e5\u505c\u6b62\u4f4d\u3002\u63a5\u6536\u7aef\u4f1a\u5bf9\u6570\u636e\u8fdb\u884c\u6821\u9a8c\uff0c\u786e\u4fdd\u6570\u636e\u6ca1\u6709\u53d1\u751f\u9519\u8bef\u3002<\/p><\/li><\/ol><h3><strong>\u4e8c\u3001Uart\u4e32\u53e3\u53d1\u9001<\/strong><\/h3><h5><strong>\uff08\u4e00\uff09\u8bbe\u8ba1\u4ee3\u7801<\/strong><\/h5><div><strong> <img decoding=\"async\" src=\"http:\/\/www.hanhhsir.cn\/wp-content\/uploads\/2025\/02\/3dd2ae48d5b875d35ab48643999be6b9-scaled-e1739868485732-300x216.jpg\" alt=\"\" width=\"300\" height=\"216\" \/><\/strong><\/div><p data-start=\"775\" data-end=\"887\">module uart_byte_tx(<br \/>Clk,<br \/>Reset_n,<br \/>Data,<br \/>Send_Go,<br \/><span style=\"color: #000000;\">Baud_set,<\/span><br \/>uart_tx,<br \/><span style=\"color: #ff6600;\">\/\/Tx_done<\/span><br \/>);<strong><span style=\"color: #993366;\">\u6a21\u5757\u58f0\u660e\u90e8\u5206<\/span><\/strong><\/p><p data-start=\"775\" data-end=\"887\">input Clk;<br \/>input Reset_n;<br \/>input [7:0]Data;<br \/>input Send_Go;<br \/>input [2:0]Baud_set;<br \/>output reg uart_tx;<strong><span style=\"color: #993366;\">\u5916\u90e8\u7aef\u53e3\u58f0\u660e<\/span><\/strong><\/p><p data-start=\"775\" data-end=\"887\">reg Send_en;<br \/>reg Tx_done;<span style=\"color: #999999;\"><span style=\"color: #ff6600;\">\/\/output reg Tx_done;<\/span><strong><span style=\"color: #993366;\">\u5185\u90e8\u4fe1\u53f7\u58f0\u660e<\/span><\/strong><\/span><\/p><p>always@(posedge Clk or negedge Reset_n)<br \/>if(!Reset_n)<br \/>Send_en &lt;= 0;<br \/>else if(Send_Go)<span style=\"color: #999999;\"><span style=\"color: #ff6600;\">\/\/\u5f53\u5916\u90e8\u5e94\u7528\u7ed9\u4e00\u4e2a\u8109\u51b2Send_Go\u4fe1\u53f7\u65f6\uff0c\u5185\u90e8Send_en\u4fe1\u53f7\u5f00\u59cb\u5de5\u4f5c\uff0c\u68c0\u6d4b\u5230Tx_done\u53d1\u9001\u5b8c\u6210\u4fe1\u53f7\uff0c\u5c31\u505c\u6b62\u5de5\u4f5c\u3002<\/span><\/span><br \/>Send_en &lt;= 1;<br \/>else if(Tx_done)<br \/>Send_en &lt;= 0;<\/p><p>reg [7:0]r_Data;<span style=\"color: #ff6600;\">\/\/\u6784\u5efa\u4e00\u4e2a\u5bc4\u5b58\u5668r_Data,\u7528\u6765\u5b58\u50a8\u4fe1\u53f7\uff0c\u5f53Send_Go\u9ad8\u7535\u5e73\u4fe1\u53f7\u6765\u7684\u65f6\u5019\uff0c\u4fdd\u8bc1\u6b64\u523b\u7684\u5916\u90e8Data\u6570\u636e\u80fd\u591f\u4fdd\u7559\u4f4f\u3002<\/span><br \/><span style=\"color: #000000;\">always@(posedge Clk)<\/span><br \/>if(Send_Go)<br \/>r_Data &lt;= Data;<br \/>else<br \/>r_Data &lt;= r_Data;<\/p><p><span style=\"color: #ff6600;\">\/\/Baud_set = 0,\u5c31\u8ba9\u6ce2\u7279\u7387 = 9600\uff1b<\/span><br \/><span style=\"color: #ff6600;\">\/\/Baud_set = 1,\u5c31\u8ba9\u6ce2\u7279\u7387 = 19200\uff1b<\/span><br \/><span style=\"color: #ff6600;\">\/\/Baud_set = 2,\u5c31\u8ba9\u6ce2\u7279\u7387 = 38400\uff1b<\/span><br \/><span style=\"color: #ff6600;\">\/\/Baud_set = 3,\u5c31\u8ba9\u6ce2\u7279\u7387 = 57600\uff1b<\/span><br \/><span style=\"color: #ff6600;\">\/\/Baud_set = 4,\u5c31\u8ba9\u6ce2\u7279\u7387 = 115200\uff1b<\/span><\/p><p>reg [17:0]bps_DR;<br \/>always@(*)<br \/>case(Baud_set)<br \/>0:bps_DR = 1000000000\/9600\/20;<br \/>1:bps_DR = 1000000000\/19200\/20;<br \/>2:bps_DR = 1000000000\/38400\/20;<br \/>3:bps_DR = 1000000000\/57600\/20;<br \/>4:bps_DR = 1000000000\/115200\/20;<br \/>default:bps_DR = 1000000000\/9600\/20;<br \/>endcase<\/p><p>wire bps_clk;<br \/>assign bps_clk = (div_cnt == 1);<\/p><p>reg [17:0]div_cnt;<br \/>always@(posedge Clk or negedge Reset_n)<br \/>if(!Reset_n)<br \/>div_cnt &lt;=0;<br \/>else if(Send_en)begin<br \/>if(div_cnt == bps_DR &#8211; 1)<br \/>div_cnt &lt;= 0; <br \/>else <br \/>div_cnt &lt;= div_cnt + 1&#8217;b1; <br \/>end<br \/>else<br \/>div_cnt &lt;=0;<\/p><p>reg [3:0]bps_cnt;<br \/>always@(posedge Clk or negedge Reset_n)<br \/>if(!Reset_n)<br \/>bps_cnt &lt;=0;<br \/>else if(Send_en)begin<br \/>if(bps_clk)begin<span style=\"color: #ff6600;\">\/\/ if(div_cnt == bps_DR &#8211; 1)begin,bps_DR &#8211; 1\u7684\u8ba1\u6ee1\u5c06\u5bfc\u81f4bps_cnt\u8ba1\u6570\u4e0d\u53ca\u65f6\uff0c\u8fdb\u800c\u5bfc\u81f4uart_tx\u7684\u8d77\u59cb\u4f4d\u53d1\u9001\u4e0d\u53ca\u65f6\u3002<\/span><br \/>if(bps_cnt == 11)<br \/>bps_cnt &lt;= 0;<br \/>else<br \/>bps_cnt &lt;= bps_cnt + 1&#8217;b1;<br \/>end<br \/>end<br \/>else<br \/>bps_cnt &lt;= 0;<\/p><p>always@(posedge Clk or negedge Reset_n)<br \/>if(!Reset_n)begin<br \/>uart_tx &lt;= 1&#8217;b1;<br \/>Tx_done &lt;= 0;<br \/>end <br \/>else begin<br \/>case(bps_cnt)<br \/>1:uart_tx &lt;= 0; <span style=\"color: #ff6600;\">\/\/\u5f53bps_cnt\u4e3a1\u65f6\uff0cuart_tx\u4e00\u76f4\u4fdd\u6301\u4e3a0,\u8fd9\u91cc\u53d1\u9001\u8d77\u59cb\u4f4d\u3002<\/span><br \/>2:uart_tx &lt;= r_Data[0];<br \/>3:uart_tx &lt;= r_Data[1];<br \/>4:uart_tx &lt;= r_Data[2];<br \/>5:uart_tx &lt;= r_Data[3];<br \/>6:uart_tx &lt;= r_Data[4];<br \/>7:uart_tx &lt;= r_Data[5];<br \/>8:uart_tx &lt;= r_Data[6];<br \/>9:uart_tx &lt;= r_Data[7];<br \/>10:uart_tx &lt;= 1;<br \/>11:uart_tx &lt;= 1;<br \/>default:uart_tx &lt;= 1;<br \/>endcase<br \/>end<\/p><p>always@(posedge Clk or negedge Reset_n)<br \/>if(!Reset_n)<br \/>Tx_done &lt;= 0;<br \/>else if((bps_clk ==1) &amp;&amp; (bps_cnt == 11)) <br \/>Tx_done &lt;= 1; <br \/>else <br \/>Tx_done &lt;= 0; <br \/><span style=\"color: #ff6600;\">\/\/ 0:begin uart_tx &lt;= 0;Tx_done &lt;=1&#8217;b0;end \u5f53bps_cnt\u4e3a0\u65f6\uff0cuart_tx\u4e00\u76f4\u4fdd\u6301\u4e3a0\uff08\u8fd9\u4e0d\u662f\u6211\u4eec\u60f3\u8981\u76841\uff09<\/span><br \/><span style=\"color: #ff6600;\">\/\/ 1:uart_tx &lt;= Data[0]; <\/span><br \/><span style=\"color: #ff6600;\">\/\/ 2:uart_tx &lt;= Data[1];<\/span><br \/><span style=\"color: #ff6600;\">\/\/ 3:uart_tx &lt;= Data[2];<\/span><br \/><span style=\"color: #ff6600;\">\/\/ 4:uart_tx &lt;= Data[3];<\/span><br \/><span style=\"color: #ff6600;\">\/\/ 5:uart_tx &lt;= Data[4];<\/span><br \/><span style=\"color: #ff6600;\">\/\/ 6:uart_tx &lt;= Data[5];<\/span><br \/><span style=\"color: #ff6600;\">\/\/ 7:uart_tx &lt;= Data[6];<\/span><br \/><span style=\"color: #ff6600;\">\/\/ 8:uart_tx &lt;= Data[7];<\/span><br \/><span style=\"color: #ff6600;\">\/\/ 9:uart_tx &lt;= 1;<\/span><br \/><span style=\"color: #ff6600;\">\/\/ 10:begin uart_tx &lt;= 1;Tx_done &lt;=1&#8217;b1;end<\/span><br \/><span style=\"color: #ff6600;\">\/\/ default:uart_tx &lt;= 1;<span style=\"color: #993366;\"><strong>\u529f\u80fd\u903b\u8f91\u90e8\u5206<\/strong><\/span><\/span><\/p><div>\u00a0<\/div><h5><strong>\uff08\u4e8c\uff09Testbench\u9a8c\u8bc1<\/strong><\/h5><p>`timescale 1ns \/ 1ps<strong><span style=\"color: #993366;\">\u4eff\u771f\u603b\u65f6\u957f1ps,\u4eff\u771f\u7cbe\u5ea61ns<\/span><\/strong><\/p><p>module uart_byte_tx_tb();<strong style=\"color: #993366; font-family: var( --e-global-typography-text-font-family ), Sans-serif; letter-spacing: 0px; text-align: var(--text-align);\" data-start=\"87\" data-end=\"100\">\u6a21\u5757\u5b9a\u4e49<\/strong><br \/>reg sys_clk;<br \/>reg sys_rst_n;<br \/>reg [7:0]Data;<br \/>reg Send_en;<br \/>wire [2:0]Baud_set;<br \/>wire Rx_Done;<br \/>wire [7:0]Data_all;<span style=\"color: #993366;\"><strong style=\"font-family: var( --e-global-typography-text-font-family ), Sans-serif; text-align: var(--text-align); letter-spacing: 0px;\" data-start=\"87\" data-end=\"100\">\u4fe1\u53f7\u58f0\u660e<\/strong><\/span><\/p><p>uart_loopback uart_loopback(<br \/>.sys_clk(sys_clk),<br \/>.sys_rst_n(sys_rst_n),<br \/>.Send_en(Send_en),<br \/>.Baud_set(Baud_set),<br \/>.Data(Data),<br \/>.Data_all(Data_all),<br \/>.Rx_Done(Rx_Done)<br \/><span style=\"color: #ff6600;\">\/\/ output Tx_done<\/span><br \/><span style=\"color: #ff6600;\">\/\/input uart_rx,<\/span><br \/><span style=\"color: #ff6600;\">\/\/output uart_tx<\/span><br \/>);<strong><span style=\"color: #993366;\">\u88ab\u6d4b\u8bd5\u6a21\u5757\u5b9e\u4f8b\u5316\uff08DUT\uff09<\/span><\/strong><\/p><p><span style=\"color: #ff6600;\">\/\/wire Tx_done;<\/span><br \/>reg uart_rx;<br \/><span style=\"color: #ff6600;\">\/\/wire uart_tx;<\/span><\/p><p>assign Baud_set = 3&#8217;d4;<\/p><p>initial sys_clk = 1;<br \/>always#10 sys_clk = ~sys_clk;<strong><span style=\"color: #993366;\">\u65f6\u949f\u751f\u6210<\/span><\/strong><strong><span style=\"color: #993366;\">\u00a0\u00a0<\/span><\/strong><span style=\"color: #ff6600;\"><span style=\"font-family: var( --e-global-typography-text-font-family ), Sans-serif; font-weight: var( --e-global-typography-text-font-weight ); text-align: var(--text-align); letter-spacing: 0px;\">\u4f7f\u7528<\/span><code style=\"font-weight: var( --e-global-typography-text-font-weight ); text-align: var(--text-align); letter-spacing: 0px;\" data-start=\"1009\" data-end=\"1018\">initial<\/code><span style=\"font-family: var( --e-global-typography-text-font-family ), Sans-serif; font-weight: var( --e-global-typography-text-font-weight ); text-align: var(--text-align); letter-spacing: 0px;\">\u5757\u521d\u59cb\u5316\u7cfb\u7edf\u65f6\u949f\uff0c\u5e76\u901a\u8fc7<\/span><code style=\"font-weight: var( --e-global-typography-text-font-weight ); text-align: var(--text-align); letter-spacing: 0px;\" data-start=\"1030\" data-end=\"1038\">always<\/code><span style=\"font-family: var( --e-global-typography-text-font-family ), Sans-serif; font-weight: var( --e-global-typography-text-font-weight ); text-align: var(--text-align); letter-spacing: 0px;\">\u5757\u521b\u5efa\u65f6\u949f\u5468\u671f\uff0c\u4f7f\u65f6\u949f\u5468\u671f\u4e3a20ns\uff08\u5373\u9891\u7387\u4e3a50MHz\uff09<\/span><\/span><\/p><p>initial begin\u00a0 \u00a0<br \/>sys_rst_n = 0;<br \/>Data = 0;<br \/>Send_en = 0;<br \/>#201;<br \/>sys_rst_n = 1;<\/p><p>#100;<br \/>uart_rx = 0;<br \/>Data = 8&#8217;h57;<br \/>Send_en = 1;<br \/>#2000;<br \/>@(posedge Rx_Done);<br \/>Send_en = 0;<\/p><p>#100;<br \/>uart_rx = 0;<br \/>Data = 8&#8217;h75;<br \/>Send_en = 1;<br \/>#2000;<br \/>@(posedge Rx_Done);<br \/>Send_en = 0; <br \/>uart_rx = 1;<br \/>$stop;<br \/>end<span style=\"color: #993366;\"><strong>\u8f93\u5165\u6fc0\u52b1\u4fe1\u53f7\u7684\u751f\u6210\u00a0\u00a0<\/strong><\/span><span style=\"font-family: var( --e-global-typography-text-font-family ), Sans-serif; font-weight: var( --e-global-typography-text-font-weight ); text-align: var(--text-align); letter-spacing: 0px; color: #ff6600;\">\u901a\u8fc7<\/span><code style=\"font-weight: var( --e-global-typography-text-font-weight ); text-align: var(--text-align); letter-spacing: 0px; font-size: 12.75px; color: #ff6600;\" data-start=\"1227\" data-end=\"1236\">initial<\/code><span style=\"font-family: var( --e-global-typography-text-font-family ), Sans-serif; font-weight: var( --e-global-typography-text-font-weight ); text-align: var(--text-align); letter-spacing: 0px; color: #ff6600;\">\u5757\u8bbe\u7f6e\u6fc0\u52b1\u4fe1\u53f7\uff0c\u6a21\u62df\u7cfb\u7edf\u7684\u4e0d\u540c\u8f93\u5165\u72b6\u6001\u3002\u8fd9\u91cc\u4e3b\u8981\u5bf9<\/span><code style=\"font-weight: var( --e-global-typography-text-font-weight ); text-align: var(--text-align); letter-spacing: 0px; font-size: 12.75px; color: #ff6600;\" data-start=\"1261\" data-end=\"1272\">sys_rst_n<\/code><span style=\"font-family: var( --e-global-typography-text-font-family ), Sans-serif; font-weight: var( --e-global-typography-text-font-weight ); text-align: var(--text-align); letter-spacing: 0px; color: #ff6600;\">\u3001<\/span><code style=\"font-weight: var( --e-global-typography-text-font-weight ); text-align: var(--text-align); letter-spacing: 0px; font-size: 12.75px; color: #ff6600;\" data-start=\"1273\" data-end=\"1279\">Data<\/code><span style=\"font-family: var( --e-global-typography-text-font-family ), Sans-serif; font-weight: var( --e-global-typography-text-font-weight ); text-align: var(--text-align); letter-spacing: 0px; color: #ff6600;\">\u3001<\/span><code style=\"font-weight: var( --e-global-typography-text-font-weight ); text-align: var(--text-align); letter-spacing: 0px; font-size: 12.75px; color: #ff6600;\" data-start=\"1280\" data-end=\"1289\">Send_en<\/code><span style=\"font-family: var( --e-global-typography-text-font-family ), Sans-serif; font-weight: var( --e-global-typography-text-font-weight ); text-align: var(--text-align); letter-spacing: 0px; color: #ff6600;\">\u3001<\/span><code style=\"font-weight: var( --e-global-typography-text-font-weight ); text-align: var(--text-align); letter-spacing: 0px; font-size: 12.75px; color: #ff6600;\" data-start=\"1290\" data-end=\"1299\">uart_rx<\/code><span style=\"font-family: var( --e-global-typography-text-font-family ), Sans-serif; font-weight: var( --e-global-typography-text-font-weight ); text-align: var(--text-align); letter-spacing: 0px; color: #ff6600;\">\u7b49\u4fe1\u53f7\u8fdb\u884c\u63a7\u5236\uff0c\u4ee5\u6d4b\u8bd5UART\u6a21\u5757\u7684\u4e0d\u540c\u529f\u80fd<\/span><\/p><p>endmodule<\/p><h3><strong>\u4e09\u3001Uart\u4e32\u53e3\u63a5\u6536<\/strong><\/h3><h5><strong>\uff08\u4e00\uff09\u8bbe\u8ba1\u4ee3\u7801<\/strong><\/h5><div><div>`timescale 1ns \/ 1ps<\/div><div>\u00a0<\/div><div>module uart_byte_rx(<\/div><div>\u00a0 \u00a0 Clk,<\/div><div>\u00a0 \u00a0 Reset_n,<\/div><div>\u00a0 \u00a0 Baud_set,<\/div><div>\u00a0 \u00a0 uart_rx,<\/div><div>\u00a0 \u00a0 Data_all,<\/div><div>\u00a0 \u00a0 Rx_Done,<\/div><div>\u00a0 \u00a0 );<strong style=\"color: var( --e-global-color-text ); font-family: var( --e-global-typography-text-font-family ), Sans-serif; text-align: var(--text-align); letter-spacing: 0px;\"><span style=\"color: #993366;\">\u6a21\u5757\u58f0\u660e\u90e8\u5206<\/span><\/strong><\/div><div>\u00a0 \u00a0\u00a0<\/div><div>\u00a0 \u00a0 input\u00a0 Clk;<\/div><div>\u00a0 \u00a0 input\u00a0 Reset_n;<\/div><div>\u00a0 \u00a0 input\u00a0 [2:0]Baud_set;<\/div><div>\u00a0 \u00a0 input\u00a0 uart_rx;<\/div><div>\u00a0 \u00a0 output\u00a0 reg [7:0]Data_all;<\/div><div>\u00a0 \u00a0 output\u00a0 reg Rx_Done;<strong style=\"color: var( --e-global-color-text ); font-family: var( --e-global-typography-text-font-family ), Sans-serif; text-align: var(--text-align); letter-spacing: 0px;\"><span style=\"color: #993366;\">\u5916\u90e8\u7aef\u53e3\u58f0\u660e<\/span><\/strong><\/div><div>\u00a0 \u00a0\u00a0<\/div><div>\u00a0 \u00a0 reg [1:0]uart_rx_r;<\/div><div>\u00a0 \u00a0 always@(posedge Clk)begin<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 uart_rx_r[0] &lt;= uart_rx;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 uart_rx_r[1] &lt;= uart_rx_r[0];<\/div><div>\u00a0 \u00a0 end<\/div><div>\u00a0 \u00a0\u00a0<\/div><div>\u00a0 \u00a0 wire pedge_uart_rx;<\/div><div>\/\/\u00a0 assign pedge_uart_rx = ((uart_rx_r[1]==0) &amp;&amp; (uart_rx_r[0] == 1));<\/div><div>\u00a0 \u00a0 assign pedge_uart_rx = (uart_rx_r == 2&#8217;b01);<\/div><div>\u00a0 \u00a0 wire nedge_uart_rx;<\/div><div>\/\/\u00a0 assign nedge_uart_rx = ((uart_rx_r[1]==1) &amp;&amp; (uart_rx_r[0] == 0));<\/div><div>\u00a0 \u00a0 assign nedge_uart_rx = (uart_rx_r == 2&#8217;b10);<\/div><div>\u00a0 \u00a0\u00a0<\/div><div>\u00a0 \u00a0 reg [8:0] Bps_DR;<\/div><div>\u00a0 \u00a0 always@(*)<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 case(Baud_set)<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 0:Bps_DR = 1000000000\/9600\/16\/20 &#8211; 1;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 1:Bps_DR = 1000000000\/19200\/16\/20 &#8211; 1;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 2:Bps_DR = 1000000000\/38400\/16\/20 &#8211; 1;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 3:Bps_DR = 1000000000\/57600\/16\/20 &#8211; 1;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 4:Bps_DR = 1000000000\/115200\/16\/20 &#8211; 1;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 default:Bps_DR = 1000000000\/9600\/16\/20 &#8211; 1;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 endcase<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0\u00a0<\/div><div>\u00a0 \u00a0 wire bps_clk_16x;<\/div><div>\u00a0 \u00a0 assign bps_clk_16x = (div_cnt == Bps_DR \/ 2);<\/div><div>\u00a0 \u00a0 reg [2:0]sta_bit;<\/div><div>\u00a0 \u00a0 reg [2:0]sto_bit;<strong style=\"font-family: var( --e-global-typography-text-font-family ), Sans-serif; text-align: var(--text-align); letter-spacing: 0px; color: #999999;\"><span style=\"color: #993366;\">\u5185\u90e8\u4fe1\u53f7\u58f0\u660e<\/span><\/strong><\/div><div>\u00a0 \u00a0\u00a0<\/div><div>\u00a0 \u00a0\u00a0<\/div><div>\u00a0 \u00a0 reg RX_EN;<\/div><div>\u00a0 \u00a0 always@(posedge Clk or negedge Reset_n)<strong style=\"font-family: var( --e-global-typography-text-font-family ), Sans-serif; text-align: var(--text-align); letter-spacing: 0px; color: #993366;\">\u529f\u80fd\u903b\u8f91\u90e8\u5206<\/strong><\/div><div>\u00a0 \u00a0 if(!Reset_n)<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 RX_EN &lt;= 0;<\/div><div>\u00a0 \u00a0 else if(nedge_uart_rx)<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 RX_EN &lt;= 1;<\/div><div>\u00a0 \u00a0 else if (Rx_Done || (sta_bit &gt;= 4))<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 RX_EN &lt;= 0;<\/div><div>\u00a0 \u00a0\u00a0<\/div><div>\u00a0 \u00a0 reg [8:0]div_cnt;<\/div><div>\u00a0 \u00a0\u00a0<\/div><div>\u00a0 \u00a0 always@(posedge Clk or negedge Reset_n)<\/div><div>\u00a0 \u00a0 if(!Reset_n)\u00a0 \u00a0<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 div_cnt &lt;= 0;<\/div><div>\u00a0 \u00a0 else if(RX_EN)begin<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 if(div_cnt == Bps_DR)<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 div_cnt &lt;= 0;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 else<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 div_cnt &lt;= div_cnt+1&#8217;b1;<\/div><div>\u00a0 \u00a0 end<\/div><div>\u00a0 \u00a0 else<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 div_cnt &lt;= 0;<\/div><div>\u00a0 \u00a0\u00a0<\/div><div>\u00a0 \u00a0 reg [7:0]bps_cnt;<\/div><div>\u00a0 \u00a0 always@(posedge Clk or negedge Reset_n)<\/div><div>\u00a0 \u00a0 if(!Reset_n)<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 bps_cnt &lt;= 0;<\/div><div>\u00a0 \u00a0 else if(RX_EN)begin<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if(bps_clk_16x)begin<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if(bps_cnt == 160)<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 bps_cnt &lt;= 0;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 else<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 bps_cnt &lt;= bps_cnt +1&#8217;b1;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 end<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 else<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 bps_cnt &lt;= bps_cnt;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 end<\/div><div>\u00a0 \u00a0 else\u00a0<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 bps_cnt &lt;= 0;<\/div><div>\u00a0 \u00a0\u00a0<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0\u00a0<\/div><div>\u00a0 \u00a0 \/\/\u65b0\u8bed\u6cd5\uff1areg width number\/depth<\/div><div>\u00a0 \u00a0 reg [2:0]r_data[7:0];\/\/\u7528\u4e8e\u6536\u96c6\u6570\u636e\uff1f<\/div><div>\u00a0\u00a0<\/div><div>\u00a0 \u00a0 always@(posedge Clk or negedge Reset_n)<\/div><div>\u00a0 \u00a0 if(!Reset_n)begin<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 sta_bit &lt;= 0;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 sto_bit &lt;= 0;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 r_data[0] &lt;= 0;\u00a0<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 r_data[1] &lt;= 0;\u00a0<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 r_data[2] &lt;= 0;\u00a0<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 r_data[3] &lt;= 0;\u00a0<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 r_data[4] &lt;= 0;\u00a0<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 r_data[5] &lt;= 0;\u00a0<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 r_data[6] &lt;= 0;\u00a0<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 r_data[7] &lt;= 0;\u00a0<\/div><div>\u00a0 \u00a0 \u00a0end<\/div><div>\u00a0 \u00a0 \u00a0else if(bps_clk_16x)begin<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 case(bps_cnt)<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 0:begin<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 sta_bit &lt;= 0;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 sto_bit &lt;= 0;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 r_data[0] &lt;= 0; <span style=\"color: #ff6600;\">\/\/\u7531\u4e8e\u67098\u4f4d\u6570\u636e\uff0c\u56e0\u6b64\u5206\u522b\u5b9a\u4e498\u7ed9\u5bc4\u5b58\u5668r_data0-7\uff0c\u6bcf\u4e2a\u5bc4\u5b58\u5668\u7528\u4e8e\u5bc4\u5b58\u4e00\u4f4d\u6570\u636e\u4e2d\u9ad8\u7535\u5e73\u7684\u6570\u91cf<\/span><\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 r_data[1] &lt;= 0;\u00a0<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 r_data[2] &lt;= 0;\u00a0<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 r_data[3] &lt;= 0;\u00a0<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 r_data[4] &lt;= 0;\u00a0<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 r_data[5] &lt;= 0;\u00a0<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 r_data[6] &lt;= 0;\u00a0<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 r_data[7] &lt;= 0;\u00a0<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 end<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 5,6.7,8,9,10,11:sta_bit &lt;= sta_bit + uart_rx;<span style=\"color: #ff6600;\">\/\/\u7531\u4e8e\u67098\u4f4d\u6570\u636e\u4f4d\uff0c\u6211\u4eec\u5c06\u6bcf\u4e00\u4f4d\u6570\u636e\u4f4d\u5206\u4e3a16\u7ed9\u90e8\u5206\uff0c\u91c7\u6837\u5176\u4e2d\u76847\u4e2a\u90e8\u5206<\/span>\uff0c<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 21,22,23,24,25,26,27:r_data[0] &lt;= r_data[0] + uart_rx;<span style=\"color: #ff6600;\">\/\/\u5c06\u5f97\u5230\u7684\u9ad8\u7535\u5e73\u719f\u7ec3\u5bc4\u5b58\u5728r_data\u5bc4\u5b58\u5668\u4e2d<\/span>\u3002<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 37,38,39,40,41,42,43:r_data[1] &lt;= r_data[1] + uart_rx;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 53,54,55,56,57,58,59:r_data[2] &lt;= r_data[2] + uart_rx;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 69,70,71,72,73,74,75:r_data[3] &lt;= r_data[3] + uart_rx;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 85,86,87,88,89,90,91:r_data[4] &lt;= r_data[4] + uart_rx;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 101,102,103,104,105,106,107:r_data[5] &lt;= r_data[5] + uart_rx;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 117,118,119,120,121,122,123:r_data[6] &lt;= r_data[6] + uart_rx;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 133,134,135,136,137,138,139:r_data[7] &lt;= r_data[7] + uart_rx;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 149,150,151,152,153,154,155:sto_bit &lt;= sto_bit + uart_rx;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 default:;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 endcase<\/div><div>\u00a0 \u00a0 \u00a0 end<\/div><div>\u00a0 \u00a0 \u00a0\u00a0<\/div><div>\u00a0 \u00a0 always@(posedge Clk or negedge Reset_n)<\/div><div>\u00a0 \u00a0 if(!Reset_n)<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 Data_all &lt;= 0;<\/div><div>\u00a0 \u00a0 else if(bps_clk_16x &amp;&amp; (bps_cnt ==160))begin<span style=\"color: #ff6600;\">\/\/\u5224\u65ad\u5bc4\u5b58\u5668r_data0-7\uff0c8\u4e2a\u5bc4\u5b58\u5668\u4e2d\u9ad8\u7535\u5e73\u7684\u6570\u91cf\u662f\u5426\u5927\u4e8e\u7b49\u4e8e4<\/span><\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 Data_all[0] &lt;= (r_data[0] &gt;=4)?1&#8217;b1:1&#8217;b0;<span style=\"color: #ff6600;\">\/\/\u5982\u679c\u6ee1\u8db3\u6761\u4ef6\uff0c\u5219\u8be5\u4f4d\u5b9a\u4e49\u4e3a\u9ad8\u7535\u5e73\uff0c\u5426\u5219\u5b9a\u4e49\u4e3a\u4f4e\u7535\u5e73\u3002<\/span><\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 Data_all[1] &lt;= (r_data[1] &gt;=4)?1&#8217;b1:1&#8217;b0;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 Data_all[2] &lt;= (r_data[2] &gt;=4)?1&#8217;b1:1&#8217;b0;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 Data_all[3] &lt;= (r_data[3] &gt;=4)?1&#8217;b1:1&#8217;b0;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 Data_all[4] &lt;= (r_data[4] &gt;=4)?1&#8217;b1:1&#8217;b0;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 Data_all[5] &lt;= (r_data[5] &gt;=4)?1&#8217;b1:1&#8217;b0;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 Data_all[6] &lt;= (r_data[6] &gt;=4)?1&#8217;b1:1&#8217;b0;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 Data_all[7] &lt;= (r_data[7] &gt;=4)?1&#8217;b1:1&#8217;b0;<\/div><div>\u00a0 \u00a0 end<\/div><div>\u00a0 \u00a0\u00a0<\/div><div>\u00a0 \u00a0 always@(posedge Clk or negedge Reset_n)<\/div><div>\u00a0 \u00a0 if(!Reset_n)<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 Rx_Done &lt;= 0;<\/div><div>\u00a0 \u00a0 else if((div_cnt == Bps_DR\/2) &amp;&amp; (bps_cnt == 160))<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 Rx_Done &lt;= 1;<\/div><div>\u00a0 \u00a0 else<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 Rx_Done &lt;= 0;<\/div><div>\u00a0 \u00a0\u00a0<\/div><div>endmodule<\/div><div style=\"font-weight: bold;\">\u00a0<\/div><\/div><h5><strong>\uff08\u4e8c\uff09Testbench\u9a8c\u8bc1<\/strong><\/h5><div><div>`timescale 1ns \/ 1ps<strong style=\"color: var( --e-global-color-text ); font-family: var( --e-global-typography-text-font-family ), Sans-serif; text-align: var(--text-align); letter-spacing: 0px;\"><span style=\"color: #993366;\">\u4eff\u771f\u603b\u65f6\u957f1ps,\u4eff\u771f\u7cbe\u5ea61ns<\/span><\/strong><\/div><div>\u00a0<\/div><div>module uart_byte_rx_tb();<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 reg\u00a0 Clk;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 reg\u00a0 Reset_n;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 wire\u00a0 [2:0]Baud_Set;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 reg\u00a0 uart_rx;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 wire [7:0]Data;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 wire Rx_Done;<strong style=\"font-family: var( --e-global-typography-text-font-family ), Sans-serif; text-align: var(--text-align); letter-spacing: 0px; color: #993366;\" data-start=\"87\" data-end=\"100\">\u6a21\u5757\u5b9a\u4e49<\/strong><\/div><div>\u00a0 \u00a0 \u00a0 \u00a0\u00a0<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 assign Baud_Set = 4;<\/div><div>\u00a0<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0uart_byte_rx uart_byte_rx(<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 .Clk(Clk),<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 .Reset_n(Reset_n),<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 .Baud_Set(Baud_Set),<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 .uart_rx(uart_rx),<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 .Data(Data),<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 .Rx_Done(Rx_Done)<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 );<strong style=\"color: var( --e-global-color-text ); font-family: var( --e-global-typography-text-font-family ), Sans-serif; text-align: var(--text-align); letter-spacing: 0px;\"><span style=\"color: #993366;\">\u88ab\u6d4b\u8bd5\u6a21\u5757\u5b9e\u4f8b\u5316\uff08DUT\uff09<\/span><\/strong><\/div><div>\u00a0 \u00a0 \u00a0 \u00a0\u00a0<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 initial Clk = 1;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 always#10 Clk = ~Clk;<strong style=\"color: var( --e-global-color-text ); font-family: var( --e-global-typography-text-font-family ), Sans-serif; text-align: var(--text-align); letter-spacing: 0px;\"><span style=\"color: #993366;\">\u65f6\u949f\u751f\u6210<\/span><\/strong><span style=\"font-family: var( --e-global-typography-text-font-family ), Sans-serif; font-weight: var( --e-global-typography-text-font-weight ); text-align: var(--text-align); letter-spacing: 0px; color: #ff6600;\"><span style=\"font-family: var( --e-global-typography-text-font-family ), Sans-serif; font-weight: var( --e-global-typography-text-font-weight ); text-align: var(--text-align); letter-spacing: 0px;\">\u4f7f\u7528<\/span><code style=\"font-size: 12.75px; font-weight: var( --e-global-typography-text-font-weight ); text-align: var(--text-align); letter-spacing: 0px;\" data-start=\"1009\" data-end=\"1018\">initial<\/code><span style=\"font-family: var( --e-global-typography-text-font-family ), Sans-serif; font-weight: var( --e-global-typography-text-font-weight ); text-align: var(--text-align); letter-spacing: 0px;\">\u5757\u521d\u59cb\u5316\u7cfb\u7edf\u65f6\u949f\uff0c\u5e76\u901a\u8fc7<\/span><code style=\"font-size: 12.75px; font-weight: var( --e-global-typography-text-font-weight ); text-align: var(--text-align); letter-spacing: 0px;\" data-start=\"1030\" data-end=\"1038\">always<\/code><span style=\"font-family: var( --e-global-typography-text-font-family ), Sans-serif; font-weight: var( --e-global-typography-text-font-weight ); text-align: var(--text-align); letter-spacing: 0px;\">\u5757\u521b\u5efa\u65f6\u949f\u5468\u671f\uff0c\u4f7f\u65f6\u949f\u5468\u671f\u4e3a20ns\uff08\u5373\u9891\u7387\u4e3a50MHz\uff09<\/span><\/span><\/div><div>\u00a0 \u00a0 \u00a0 \u00a0\u00a0<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 initial begin<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 Reset_n = 0;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 uart_rx = 1;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 #201;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 Reset_n = 1;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 #200;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 uart_tx_byte(8&#8217;h5a);<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 #90000;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 uart_tx_byte(8&#8217;ha5);<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 #90000;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 uart_tx_byte(8&#8217;h86);<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 #90000;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 $stop;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 end<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0\u00a0<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 task uart_tx_byte;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 input [7:0]tx_data;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 begin<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 uart_rx = 1;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 #20;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 uart_rx = 0;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 #8680;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 uart_rx = tx_data[0];<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 #8680;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 uart_rx = tx_data[1];<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 #8680;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 uart_rx = tx_data[2];<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 #8680;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 uart_rx = tx_data[3];<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 #8680;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 uart_rx = tx_data[4];<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 #8680;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 uart_rx = tx_data[5];<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 #8680;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 uart_rx = tx_data[6];<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 #8680;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 uart_rx = tx_data[7];<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 #8680;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 uart_rx = 1;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 #8680;<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 end<\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 endtask<span style=\"font-family: var( --e-global-typography-text-font-family ), Sans-serif; font-weight: var( --e-global-typography-text-font-weight ); text-align: var(--text-align); letter-spacing: 0px; color: #993366;\"><strong>\u8f93\u5165\u6fc0\u52b1\u4fe1\u53f7\u7684\u751f\u6210\u00a0\u00a0<\/strong><\/span><\/div><div>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0<\/div><div>endmodule<\/div><\/div><div>\u00a0<\/div><div>\u00a0<\/div><div><ul class=\"wp-block-list\"><li>\u4f5c\u54c1\u5c5e\u4e8e\uff1ahanhhsir.cn<\/li><li>\u672c\u6587\u94fe\u63a5\uff1a<a href=\"http:\/\/www.hanhhsir.cn\/index.php\/2025\/02\/17\/\u53cd\u5411\u5b66\u4e60uart\u4e32\u53e3\u901a\u4fe1\/\"> http:\/\/www.hanhhsir.cn\/index.php\/2025\/02\/17\/\u53cd\u5411\u5b66\u4e60uart\u4e32\u53e3\u901a\u4fe1\/<\/a><\/li><li>\u4f5c\u54c1\u91c7\u7528\uff1a \u300a \u7f72\u540d-\u975e\u5546\u4e1a\u6027\u4f7f\u7528-\u76f8\u540c\u65b9\u5f0f\u5171\u4eab 4.0 \u56fd\u9645 (CC BY-NC-SA 4.0) \u300b\u8bb8\u53ef\u534f\u8bae\u6388\u6743\u3002<\/li><\/ul><\/div><div><div style=\"font-weight: bold;\">\u00a0<\/div><\/div>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-marvy_enable_drop_animation=\"false\" data-marvy_enable_fancy_rotate=\"false\" data-marvy_enable_flying_object=\"false\" data-marvy_enable_ripples_animation=\"false\" data-marvy_enable_waves_animation=\"false\" data-marvy_enable_rings_animation=\"false\" data-marvy_enable_topology_animation=\"false\" data-marvy_enable_gradient_animation=\"false\" data-marvy_enable_snow_animation=\"false\" data-marvy_enable_firework_animation=\"false\" data-marvy_enable_cloud_animation=\"false\" class=\"elementor-element elementor-element-f8c62ca e-flex e-con-boxed e-con e-parent\" data-id=\"f8c62ca\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001Uart\u4e32\u53e3\u901a\u4fe1\u7684\u57fa\u672c\u539f\u7406 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0UART\uff08Universal Asynchronous Receiver\/Transmitter\uff0c\u901a\u7528\u5f02\u6b65\u6536\u53d1\u4f20\u8f93\u5668\uff09\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u4e32\u884c\u901a\u4fe1\u534f\u8bae\uff0c\u7528\u4e8e\u5728\u8bbe\u5907\u4e4b\u95f4\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u3002\u4e0e\u5e76\u884c\u901a\u4fe1\u65b9\u5f0f\u4e0d\u540c\uff0c\u4e32\u53e3\u901a\u4fe1\u901a\u8fc7\u4e00\u4e2a\u4fe1\u53f7\u7ebf\uff08TX\u3001RX\uff09\u4f9d\u6b21\u4f20\u8f93\u6570\u636e\u4f4d\uff0c\u51cf\u5c11\u4e86\u7ebf\u8def\u7684\u6570\u91cf\u3002 UART\u7684\u57fa\u672c\u5de5\u4f5c\u539f\u7406 \u6570\u636e\u4f20\u8f93\u65b9\u5f0fUART\u662f\u4e00\u79cd\u5f02\u6b65\u901a\u4fe1\u534f\u8bae\u3002\u8fd9\u610f\u5473\u7740\u6570\u636e\u4f20\u8f93\u4e0d\u9700\u8981\u65f6\u949f\u4fe1\u53f7\u7684\u540c\u6b65\uff0c\u800c\u662f\u901a\u8fc7\u6570\u636e\u4f4d\u7684\u8d77\u59cb\u4f4d\u3001\u6570\u636e\u4f4d\u3001\u505c\u6b62\u4f4d\u7b49\u6765\u786e\u4fdd\u4f20\u8f93\u7684\u987a\u5e8f\u548c\u53ef\u9760\u6027\u3002 \u4f20\u8f93\u6570\u636e\u7684\u7ec4\u6210\u6bcf\u6b21\u901a\u8fc7UART\u53d1\u9001\u7684\u6570\u636e\uff0c\u90fd\u4f1a\u88ab\u5206\u4e3a\u82e5\u5e72\u4f4d\uff08\u901a\u5e38\u662f8\u4f4d\uff09\u3002\u8fd98\u4f4d\u6570\u636e\u901a\u8fc7\u4e00\u6761\u6570\u636e\u7ebf\uff08TX\u7ebf\uff09\u53d1\u9001\u5230\u63a5\u6536\u8bbe\u5907\u3002\u63a5\u6536\u7aef\u4f1a\u6309\u7167\u76f8\u540c\u7684\u683c\u5f0f\uff08\u4f4d\u3001\u5f00\u59cb\u4f4d\u3001\u505c\u6b62\u4f4d\uff09\u6765\u63a5\u6536\u548c\u89e3\u6790\u6570\u636e\u3002 \u6570\u636e\u5e27\u7ed3\u6784\u6bcf\u4e2a\u6570\u636e\u5e27\u901a\u5e38\u7531\u4ee5\u4e0b\u51e0\u4e2a\u90e8\u5206\u7ec4\u6210\uff1a \u8d77\u59cb\u4f4d\uff1a\u8868\u793a\u6570\u636e\u4f20\u8f93\u7684\u5f00\u59cb\uff0c\u901a\u5e38\u4e3a\u4e00\u4e2a\u4f4e\u7535\u5e73\u3002 \u6570\u636e\u4f4d\uff1a\u5b9e\u9645\u4f20\u8f93\u7684\u6570\u636e\uff0c\u5e38\u89c1\u4e3a8\u4f4d\u3002 \u5947\u5076\u6821\u9a8c\u4f4d\uff08\u53ef\u9009\uff09\uff1a\u7528\u4e8e\u9519\u8bef\u68c0\u6d4b\uff0c\u5224\u65ad\u662f\u5426\u63a5\u6536\u5230\u6b63\u786e\u7684\u6570\u636e\u3002 \u505c\u6b62\u4f4d\uff1a\u8868\u793a\u6570\u636e\u4f20\u8f93\u7684\u7ed3\u675f\uff0c\u901a\u5e38\u4e3a1\u4f4d\u9ad8\u7535\u5e73\u3002 \u4e0b\u56fe\u4e3a\u6ca1\u6709\u5947\u5076\u6821\u9a8c\u4f4d\u7684\u6570\u636e\u5e27\u683c\u5f0f 4. \u5168\u53cc\u5de5\u4e0e\u534a\u53cc\u5de5\u00a0 \u00a0 \u00a0 \u00a0 UART\u901a\u4fe1\u652f\u6301\u5168\u53cc\u5de5\uff08Full Duplex\uff09\u548c\u534a\u53cc\u5de5\uff08Half Duplex\uff09\u4e24\u79cd\u6a21\u5f0f\u3002\u5728\u5168\u53cc\u5de5\u6a21\u5f0f\u4e0b\uff0c\u53d1\u9001\u548c\u63a5\u6536\u53ef\u4ee5\u540c\u65f6\u8fdb\u884c\uff1b\u800c\u5728\u534a\u53cc\u5de5\u6a21\u5f0f\u4e0b\uff0c\u53d1\u9001\u548c\u63a5\u6536\u662f\u4ea4\u66ff\u8fdb\u884c\u7684\u3002 UART\u7684\u5de5\u4f5c\u6d41\u7a0b \u53d1\u9001\u7aef\u5728\u53d1\u9001\u7aef\uff0c\u6570\u636e\u901a\u8fc7TX\uff08Transmit\uff09\u7ebf\u4ee5\u4e32\u884c\u5f62\u5f0f\u53d1\u9001\u51fa\u53bb\u3002\u6570\u636e\u5728\u4f20\u8f93\u65f6\u4f1a\u88ab\u5207\u5206\u6210\u4f4d\uff0c\u5148\u53d1\u9001\u8d77\u59cb\u4f4d\uff0c\u518d\u53d1\u9001\u6570\u636e\u4f4d\uff0c\u6700\u540e\u53d1\u9001\u505c\u6b62\u4f4d\u3002 \u63a5\u6536\u7aef\u63a5\u6536\u7aef\u901a\u8fc7RX\uff08Receive\uff09\u7ebf\u63a5\u6536\u5230\u6570\u636e\u3002\u5f53\u63a5\u6536\u7aef\u63a5\u6536\u5230\u6570\u636e\u65f6\uff0c\u5b83\u4f1a\u9996\u5148\u8bfb\u53d6\u8d77\u59cb\u4f4d\uff0c\u7136\u540e\u9010\u4f4d\u63a5\u6536\u6570\u636e\u4f4d\uff0c\u6700\u540e\u68c0\u67e5\u505c\u6b62\u4f4d\u3002\u63a5\u6536\u7aef\u4f1a\u5bf9\u6570\u636e\u8fdb\u884c\u6821\u9a8c\uff0c\u786e\u4fdd\u6570\u636e\u6ca1\u6709\u53d1\u751f\u9519\u8bef\u3002 \u4e8c\u3001Uart\u4e32\u53e3\u53d1\u9001 \uff08\u4e00\uff09\u8bbe\u8ba1\u4ee3\u7801 module uart_byte_tx(Clk,Reset_n,Data,Send_Go,Baud_set,uart_tx,\/\/Tx_done);\u6a21\u5757\u58f0\u660e\u90e8\u5206 input Clk;input Reset_n;input [7:0]Data;input Send_Go;input [2:0]Baud_set;output reg uart_tx;\u5916\u90e8\u7aef\u53e3\u58f0\u660e reg Send_en;reg Tx_done;\/\/output reg Tx_done;\u5185\u90e8\u4fe1\u53f7\u58f0\u660e always@(posedge Clk or negedge Reset_n)if(!Reset_n)Send_en &lt;= 0;else if(Send_Go)\/\/\u5f53\u5916\u90e8\u5e94\u7528\u7ed9\u4e00\u4e2a\u8109\u51b2Send_Go\u4fe1\u53f7\u65f6\uff0c\u5185\u90e8Send_en\u4fe1\u53f7\u5f00\u59cb\u5de5\u4f5c\uff0c\u68c0\u6d4b\u5230Tx_done\u53d1\u9001\u5b8c\u6210\u4fe1\u53f7\uff0c\u5c31\u505c\u6b62\u5de5\u4f5c\u3002Send_en &lt;= 1;else if(Tx_done)Send_en &lt;= 0; reg [7:0]r_Data;\/\/\u6784\u5efa\u4e00\u4e2a\u5bc4\u5b58\u5668r_Data,\u7528\u6765\u5b58\u50a8\u4fe1\u53f7\uff0c\u5f53Send_Go\u9ad8\u7535\u5e73\u4fe1\u53f7\u6765\u7684\u65f6\u5019\uff0c\u4fdd\u8bc1\u6b64\u523b\u7684\u5916\u90e8Data\u6570\u636e\u80fd\u591f\u4fdd\u7559\u4f4f\u3002always@(posedge Clk)if(Send_Go)r_Data &lt;= Data;elser_Data &lt;= r_Data; \/\/Baud_set = 0,\u5c31\u8ba9\u6ce2\u7279\u7387 = 9600\uff1b\/\/Baud_set = 1,\u5c31\u8ba9\u6ce2\u7279\u7387 = 19200\uff1b\/\/Baud_set = 2,\u5c31\u8ba9\u6ce2\u7279\u7387 = 38400\uff1b\/\/Baud_set = 3,\u5c31\u8ba9\u6ce2\u7279\u7387 = 57600\uff1b\/\/Baud_set = 4,\u5c31\u8ba9\u6ce2\u7279\u7387 = 115200\uff1b reg [17:0]bps_DR;always@(*)case(Baud_set)0:bps_DR = 1000000000\/9600\/20;1:bps_DR = 1000000000\/19200\/20;2:bps_DR = 1000000000\/38400\/20;3:bps_DR = 1000000000\/57600\/20;4:bps_DR = 1000000000\/115200\/20;default:bps_DR = 1000000000\/9600\/20;endcase wire bps_clk;assign bps_clk = (div_cnt == 1); reg [17:0]div_cnt;always@(posedge Clk or negedge Reset_n)if(!Reset_n)div_cnt &lt;=0;else if(Send_en)beginif(div_cnt == bps_DR &#8211; 1)div_cnt &lt;= 0; else div_cnt &lt;= div_cnt + 1&#8217;b1; endelsediv_cnt &lt;=0; reg&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-531","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"http:\/\/www.hanhhsir.cn\/index.php\/wp-json\/wp\/v2\/posts\/531","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.hanhhsir.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.hanhhsir.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.hanhhsir.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.hanhhsir.cn\/index.php\/wp-json\/wp\/v2\/comments?post=531"}],"version-history":[{"count":77,"href":"http:\/\/www.hanhhsir.cn\/index.php\/wp-json\/wp\/v2\/posts\/531\/revisions"}],"predecessor-version":[{"id":791,"href":"http:\/\/www.hanhhsir.cn\/index.php\/wp-json\/wp\/v2\/posts\/531\/revisions\/791"}],"wp:attachment":[{"href":"http:\/\/www.hanhhsir.cn\/index.php\/wp-json\/wp\/v2\/media?parent=531"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.hanhhsir.cn\/index.php\/wp-json\/wp\/v2\/categories?post=531"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.hanhhsir.cn\/index.php\/wp-json\/wp\/v2\/tags?post=531"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}