{"id":10606,"date":"2025-11-15T09:36:32","date_gmt":"2025-11-15T01:36:32","guid":{"rendered":"http:\/\/www.hellofpga.com\/?p=10606"},"modified":"2025-11-20T22:57:45","modified_gmt":"2025-11-20T14:57:45","slug":"pwm_test-2","status":"publish","type":"post","link":"http:\/\/www.hellofpga.com\/index.php\/2025\/11\/15\/pwm_test-2\/","title":{"rendered":"\u57fa\u4e8eSmart Artix \u7684FPGA\u5b9e\u9a8c\u4e03 FPGA\u8d44\u6e90\u7684PWM\u6f14\u793a"},"content":{"rendered":"\n<p>PWM\u4e5f\u5373\u8109\u51b2\u5bbd\u5ea6\u8c03\u8bd5\u6280\u672f\uff0c\u662f\u7535\u5b50\u9886\u57df\u7684\u91cd\u8981\u6280\u672f\u4e4b\u4e00\uff08\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5f00\u5173\u7535\u6e90\uff0c\u7535\u673a\u901f\u5ea6\u63a7\u5236\uff0cLED\u706f\u4eae\u5ea6\u63a7\u5236\u7b49\u9886\u57df\uff09\uff0c\u7c7b\u4f3cDSP\uff0c\u5355\u7247\u673a\uff0cSTM32\u7b49\u5fae\u5904\u7406\u5668\u4e2d\u90fd\u5e26\u6709\u786c\u4ef6PWM\uff0c\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528VERILOG\u8bed\u8a00\u6765\u5199\u4e00\u4e2aPWM\uff0c\u5e76\u901a\u8fc7\u547c\u5438\u706f\u7684\u65b9\u5f0f\u6765\u8fdb\u884c\u6548\u679c\u7684\u6f14\u793a\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6b64\u7ae0\u8282\u5185\u5bb9\u9002\u7528\u4e8eSmart Artix \u7684\u4e3b\u677f \uff0c\u5982\u662f\u672c\u7ad9\u5176\u4ed6\u677f\u5b50\u8bf7\u770b\u5bf9\u5e94\u677f\u5b50\u76ee\u5f55<\/strong><\/li>\n\n\n\n<li><strong>\u672c\u6587\u5728 vivado2018.3\u7248\u672c\u4e0a\u6f14\u793a<\/strong><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4e00\u3001PWM\u8c03\u6574LED\u4eae\u5ea6\u7684\u7b80\u5355\u539f\u7406\u5206\u6790<\/strong><\/h2>\n\n\n\n<p>\u6211\u4eec\u5148\u6765\u770b\u4e0bPWM\u7684\u6807\u51c6\u6ce2\u5f62\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff0c \u5176\u4e2d\u4e0a\u4e2d\u4e0b\u4e09\u4e2a\u6ce2\u5f62\u7684\u5468\u671fT\u548c\u9891\u7387F\u662f\u76f8\u540c\u7684\uff0c\u7b2c\u4e00\u4e2a\u6ce2\u5f62\u9ad8\u7535\u5e73\u5360\u6574\u4e2a\u5468\u671f\u7684T\u7684\u65f6\u95f4\u662f25%\uff0c\u7b2c\u4e8c\u4e2a\u6ce2\u5f62\u536050%\uff0c\u7b2c\u4e09\u4e2a\u536075%\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"749\" height=\"654\" src=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2022\/10\/image-94.png\" alt=\"\" class=\"wp-image-1231\" srcset=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2022\/10\/image-94.png 749w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2022\/10\/image-94-300x262.png 300w\" sizes=\"auto, (max-width: 706px) 89vw, (max-width: 767px) 82vw, 740px\" \/><\/figure>\n\n\n\n<p>\u56e0\u4e3a\u4e09\u4e2a\u6ce2\u5f62\u7684\u5468\u671fT\u548c\u9891\u7387F\u662f\u76f8\u540c\u7684\uff0c\u6bd4\u65b9\u8bf4 \u4e09\u4e2aPWM\u7684\u6ce2\u5f62\u90fd\u662f1KHZ\uff0c\u90a3\u4e481\u79d2\u949f\u5185\uff0c\u4e09\u4e2aPWM\u6ce2\u5f62\u90fd\u4f1a\u51fa\u73b01000\u4e2a\u5468\u671f\u4e3aT\u7684\u65b9\u6ce2\u3002\u5982\u679c\u6b64\u65f6\u62ff\u8fd93\u4e2a\u6ce2\u5f62\u5206\u522b\u53bb\u70b9\u4eae3\u4e2aLED\u706f\uff0c\u90a33\u4e2aLED\u90fd\u4f1a\u95ea\u70c11000\u6b21\uff08\u53ea\u662f\u56e0\u4e3a\u4eba\u773c\u7684\u89c6\u89c9\u6b8b\u7559\u56e0\u7d20\uff0c\u6240\u4ee5\u611f\u89c9\u4e0d\u5230\u8fd9\u4e2a\u95ea\u70c1\uff09\uff0c\u4f46\u662f\u56e0\u4e3a3\u8005\u7684\u5360\u7a7a\u6bd4\u4e0d\u540c\uff08\u9ad8\u7535\u5e73\u5360\u6574\u4e2a\u5468\u671f\u7684\u767e\u5206\u6bd4\u4e0d\u540c\uff09\u5bfc\u81f4\u6700\u4e0a\u976225%\u5360\u7a7a\u6bd4\u7684\u6ce2\u5f62\u5355\u4f4d\u65f6\u95f4\u5185\u4eae\u7684\u65f6\u95f4\u6700\u5c11\uff0c75%\u5360\u7a7a\u6bd4\u7684\u6ce2\u5f62\u4eae\u7684\u65f6\u95f4\u6700\u4e45\u3002\u53cd\u5e94\u5230\u89c6\u89c9\u4e0a\u7684\u7ed3\u679c\u5c31\u662f \u7b2c\u4e09\u4e2a\u6ce2\u5f62\u70b9\u4eae\u7684LED\u706f\u6700\u4eae\uff0c\u7b2c\u4e00\u4e2a\u6ce2\u5f62\u5bf9\u5e94\u7684LED\u706f\u6700\u6697\uff0c\u8fd9\u4e5f\u5c31\u662fPWM\u8c03\u5149\u7684\u7b80\u5355\u539f\u7406\u3002\u540c\u6837\u7684\u501f\u52a9\u8fd9\u4e2a\u65b9\u6cd5\u540c\u6837\u53ef\u4ee5\u5206\u6790\u7535\u673a\u7b49\u573a\u666f\u3002<\/p>\n\n\n\n<p>\u540c\u6837\u5f53\u5360\u7a7a\u6bd4\u4e3a0%\u65f6\uff0cLED\u706f\u5b8c\u5168\u7184\u706d\uff0c\u5f53\u5360\u7a7a\u6bd4\u4e3a100%\u65f6LED\u706f\u5b8c\u5168\u70b9\u4eae\uff0c\u501f\u52a9\u8fd9\u4e2a\u539f\u7406\uff0c\u6211\u4eec\u53ea\u8981\u5c06\u5360\u7a7a\u6bd4\u4ece0%\u9010\u6e10\u589e\u52a0\u5230100%\uff0c\u518d\u4ece100%\u9010\u6e10\u51cf\u5c11\u52300%\u4e0d\u65ad\u53d8\u5316\uff0c\u5c31\u53ef\u4ee5\u5b9e\u73b0\u547c\u5438\u706f\u7684\u6548\u679c\u4e86\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4e8c\u3001\u4ee3\u7801\u7f16\u5199<\/strong><\/h2>\n\n\n\n<p>\u9996\u5148\u6211\u4eec\u8981\u8bbe\u8ba1\u4e00\u4e2a\u5468\u671f\u6027\u7684\u8ba1\u6570\u5668\u6765\u6765\u8fdb\u884c\u6ce2\u5f62\u5468\u671f\u7684\u8ba1\u6570\uff0c\u6211\u4eec\u5b9a\u4e49\u5360\u7a7a\u6bd4\u7684\u9891\u7387\u4e3a1KHZ\uff0c\u90a3\u6ce2\u5f62\u7684\u4e00\u4e2a\u5468\u671f\u5c31\u662f1ms\uff0c\u572850mhz\u65f6\u949f\u4e0b\uff0c1ms\u76f8\u5f53\u4e8e\u632f\u8361\u4e8650000\u6b21\uff08\u5bf9\u5e94\u4e8c\u8fdb\u52361100001101010000\uff0c\u537316\u4f4d\uff09\uff0c\u6240\u4ee5\u8fd9\u91cc\u5b9a\u4e49\u4e00\u4e2a16\u4f4d\u7684\u5bc4\u5b58\u5668\u4f5c\u8ba1\u6570\u7528<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><strong>reg [15:0] period_cnt;<\/strong><\/pre>\n\n\n\n<p>\u8ba1\u6570\u7684\u4ee3\u7801\u5982\u4e0b<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">reg [15:0] time_count = 16'd0;<br> <br>\/\/ \u4ece0-50000\u7684\u8ba1\u6570\u5668\uff0c\u53731ms\u8ba1\u6570\u5668<br>always @(posedge CLK or negedge RSTn) begin<br>    if (!RSTn) begin<br>        time_count &lt;= 16'd0;<br>    end<br>    else if (time_count == 16'd50_000) begin<br>        time_count &lt;= 16'd0;<br>    end<br>    else begin<br>        time_count &lt;= time_count + 1'b1;<br>    end<\/pre>\n\n\n\n<p>\u5176\u4e2d if(!RSTn)begin time_count &lt;=16\u2019d0; end \u8fd9\u53e5\u662f\u8d1f\u8d23\u590d\u4f4d\u7528\uff0c\u5916\u90e8RSTn\u4fe1\u53f7\u63a5\u5165\u5230\u6309\u952e\u4e0a\uff08\u6309\u4e0b\u662f\u4f4e\u7535\u5e73\uff09<\/p>\n\n\n\n<p>\u4ec5\u4ec5\u6709\u8ba1\u6570\u5668\u4e0d\u80fd\u5b9e\u73b0\u6ce2\u5f62\u7684\u8f93\u51fa\u529f\u80fd\uff0c\u63a5\u4e0b\u6765\u6211\u4eec\u7b80\u5355\u5199\u4e2a \u8f93\u51fa50%\u65b9\u6ce2\u7684\u7a0b\u5e8f\uff0c\u4ec5\u4ec5\u4e00\u53e5\u8bdd\u5c31\u53ef\u4ee5\u4e86<\/p>\n\n\n\n<p>wire LED=(time_count &lt;16\u2019d25_000)?1:0;<\/p>\n\n\n\n<p>\u8fd9\u53e5\u8bdd\u76f8\u5f53\u4e8e\uff0c\u5728time_count\u75310\u8ba1\u6570\u523050_000\u7684\u8fc7\u7a0b\u4e2d\uff0c\u5f53\u5c0f\u4e8e25000\u65f6\uff0c\u8f93\u51fa1\uff0c\u5f53\u5927\u4e8e25000\u65f6\u5019\u8f93\u51fa0\uff0c\u53c8\u56e0\u4e3a\u6574\u4e2a\u5468\u671f\u662f50000\uff0c\u800c25000\u521a\u597d\u662f\u4e00\u534a\uff0c\u90a3\u6837\u5c31\u4ea7\u751f\u4e86\u4e00\u534a\u7684\u9ad8\u7535\u5e73\uff0c\u4e00\u534a\u7684\u4f4e\u7535\u5e73\uff0c\u5373\u6807\u51c6\u768450%\u65b9\u6ce2\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u7684\u76ee\u6807\u662f\u8bbe\u8ba1\u547c\u5438\u706f\uff0c\u90a3\u53ea\u8981\u628a25000\u53d8\u6210\u4e00\u4e2a\u7531\u5c0f\u5230\u5927\u53c8\u4ece\u5927\u53d8\u5230\u5c0f\u7684\u5bc4\u5b58\u5668pwm_perid\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n\n\n\n<p>\u4ee3\u7801\u5982\u4e0b<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">reg [15:0] pwm_perid = 16'd0;<br>reg mode = 0;  \/\/ mode\u4e3a0\u5219\u81ea\u589e\uff0cmode\u4e3a1\u5219\u81ea\u51cf<br>always @(posedge CLK or negedge RSTn) begin<br>    if (!RSTn) begin<br>        pwm_perid &lt;= 16'd0;<br>    end<br>    else if (time_count == 16'd50_000) begin<br>        if (mode == 1'b0) begin<br>            if (pwm_perid &lt; 16'd50_000) pwm_perid &lt;= pwm_perid + 50;<br>            else mode &lt;= 1'b1;<br>        end<br>        else if (mode == 1'b1) begin<br>            if (pwm_perid &gt; 16'd0) pwm_perid &lt;= pwm_perid - 50;<br>            else mode &lt;= 1'b0;<br>        end<br>    end<br>end<\/pre>\n\n\n\n<p>\u589e\u51cf\u7a0b\u5e8f\u7684\u6539\u53d8\u5468\u671f\u4e3a1ms\uff0c\u53731\u79d2\u949f\u6539\u53d81000\u6b21\uff0c\u8fd9\u91cc\u5077\u4e2a\u61d2\uff0c\u76f4\u63a5\u7528\u4e0a\u9762\u7684time_count\u8ba1\u6570\u5668\u6765\u4f5c\u8fd9\u8fb9\u7684\u6539\u53d8\u5468\u671f\u7528if(time_count== 16\u2019d50_000)\uff0c\u5f53\u7136\u4e5f\u53ef\u4ee5\u81ea\u5df1\u91cd\u65b0\u5199\u4e00\u4e2a\uff0c\u90fd\u4e00\u6837\u7684<\/p>\n\n\n\n<p>\u7a0b\u5e8f\u91cc\u6709\u4e00\u4e2areg mode\uff0c\u8fd9\u4e2a\u662f\u7528\u6765\u8bb0\u5f55\u5de5\u4f5c\u6a21\u5f0f\u7684\uff0cmode\u4e3a0\u5219pwm_perid\u81ea\u589e\uff0cmode\u4e3a1pwm_perid\u4e3a\u81ea\u51cf<\/p>\n\n\n\n<p>\u800cmode\u5207\u6362\u7684\u6761\u4ef6\u5c31\u662f \u5360\u7a7a\u6bd4\u8fbe\u5230\u6700\u5927\uff0c\u6216\u8005\u5360\u7a7a\u6bd4\u88ab\u51cf\u5c11\u52300%<\/p>\n\n\n\n<p>\u4ee3\u7801\u5f88\u7b80\u5355\uff0c\u76f4\u63a5\u7f16\u8bd1\u7efc\u5408\u5e76\u4e14\u4e0b\u8f7d\u8fdbFPGA\u89c2\u6d4b\u7ed3\u679c<\/p>\n\n\n\n<p>\u589e\u52a0\u7ea6\u675f\u6587\u4ef6\u5982\u4e0b<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"># Clock Constraints<br>set_property PACKAGE_PIN Y18 [get_ports CLK]<br>set_property IOSTANDARD LVCMOS33 [get_ports CLK]<br><br># Reset Constraints (active-low reset)<br>set_property PACKAGE_PIN T20 [get_ports RSTn]<br>set_property IOSTANDARD LVCMOS33 [get_ports RSTn]<br><br># LED Constraints<br>set_property PACKAGE_PIN R17 [get_ports LED]<br>set_property IOSTANDARD LVCMOS33 [get_ports LED]<br><br># Define the clock period for 50 MHz<br>create_clock -period 20.000 -name CLK -waveform {0.000 10.000} [get_ports CLK]<\/pre>\n\n\n\n<p>\u4e0b\u8f7d\u5b8c\u540e\u5c31\u80fd\u770b\u5230 LED1 \u5728\u4e0d\u505c\u7684\u53d8\u4eae\u53d8\u6697\u53d8\u4eae\u53d8\u6697\u4e86,\u6309\u4e0bRST\u952e\uff0cPWM\u4f1a\u6e05\u96f6\u91cd\u7f6e\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u672c\u7ae0\u8282\u7684\u5de5\u7a0b\uff1a<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u672c\u6587\u7684\u5b8c\u6574\u5de5\u7a0b\u4e0b\u8f7d\uff1a<a href=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2025\/11\/07_PWM_TEST.zip\">07_PWM_TEST<\/a> \uff08Smart Artix 50T\uff09<\/strong><\/li>\n\n\n\n<li><strong>VIVADO\u7684\u7248\u672c\uff1a2018.3<\/strong><\/li>\n\n\n\n<li><strong>\u5de5\u7a0b\u521b\u5efa\u76ee\u5f55\uff1aE:\\Smart_Artix\\4_Code\\07_PWM_TEST<\/strong><\/li>\n<\/ul>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528VERILOG\u8bed\u8a00\u6765\u5199\u4e00\u4e2aPWM\uff0c\u5e76\u901a\u8fc7\u547c\u5438\u706f\u7684\u65b9\u5f0f\u6765\u8fdb\u884c\u6548\u679c\u7684\u6f14\u793a\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[],"class_list":["post-10606","post","type-post","status-publish","format-standard","hentry","category-smart-artix"],"views":270,"_links":{"self":[{"href":"http:\/\/www.hellofpga.com\/index.php\/wp-json\/wp\/v2\/posts\/10606","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.hellofpga.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.hellofpga.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.hellofpga.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.hellofpga.com\/index.php\/wp-json\/wp\/v2\/comments?post=10606"}],"version-history":[{"count":7,"href":"http:\/\/www.hellofpga.com\/index.php\/wp-json\/wp\/v2\/posts\/10606\/revisions"}],"predecessor-version":[{"id":10711,"href":"http:\/\/www.hellofpga.com\/index.php\/wp-json\/wp\/v2\/posts\/10606\/revisions\/10711"}],"wp:attachment":[{"href":"http:\/\/www.hellofpga.com\/index.php\/wp-json\/wp\/v2\/media?parent=10606"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.hellofpga.com\/index.php\/wp-json\/wp\/v2\/categories?post=10606"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.hellofpga.com\/index.php\/wp-json\/wp\/v2\/tags?post=10606"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}