{"id":99501,"date":"2026-09-02T18:25:11","date_gmt":"2026-09-02T10:25:11","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/99501.html"},"modified":"2026-09-02T18:25:11","modified_gmt":"2026-09-02T10:25:11","slug":"stm32%e5%ae%9a%e6%97%b6%e5%99%a8%e8%be%93%e5%85%a5%e6%8d%95%e8%8e%b7%e6%b5%8bpwm%e9%a2%91%e7%8e%87%e4%b8%8e%e5%8d%a0%e7%a9%ba%e6%af%94%ef%bc%9a%e9%80%89%e5%9e%8b%e3%80%81%e9%81%bf%e5%9d%91%e4%b8%8e","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/99501.html","title":{"rendered":"STM32\u5b9a\u65f6\u5668\u8f93\u5165\u6355\u83b7\u6d4bPWM\u9891\u7387\u4e0e\u5360\u7a7a\u6bd4\uff1a\u9009\u578b\u3001\u907f\u5751\u4e0e\u5b9e\u6d4b\u6570\u636e"},"content":{"rendered":"<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>\n<ul>\n<li>\u4e00\u3001\u4e3a\u4ec0\u4e48\u6d4b\u4e2a PWM \u4e5f\u8981\u8ba4\u771f\u9009\u578b<\/li>\n<li>\u4e8c\u3001\u8f93\u5165\u6355\u83b7\u6d4b\u9891\u539f\u7406\u4e0e\u65b9\u6848\u5bf9\u6bd4<\/li>\n<li>\n<ul>\n<li>2.1 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\u81ea\u4ea7\u4fe1\u53f7\u81ea\u68c0&#xff09;&#xff1b;<\/li>\n<li>10 Hz&#xff5e;100 kHz \u5168\u91cf\u7a0b\u7684\u5b9e\u6d4b\u8bef\u5dee\u6570\u636e&#xff0c;\u4ee5\u53ca\u4e00\u5f20&#034;\u624b\u518c\u7406\u8bba\u503c vs \u5b9e\u6d4b\u503c&#034;\u5bf9\u7167\u8868&#xff1b;<\/li>\n<li>\u4e00\u6b21\u5b8c\u6574\u7684\u566a\u58f0\u5e72\u6270\u6392\u67e5\u8bb0\u5f55&#xff08;\u73b0\u8c61\u3001\u5de5\u5177\u3001\u5047\u8bbe\u3001\u6392\u9664\u3001\u6839\u56e0\u3001\u9a8c\u8bc1\u5168\u94fe\u8def&#xff09;&#xff1b;<\/li>\n<li>6 \u7c7b\u5e38\u89c1\u6545\u969c\u7684\u6392\u67e5\u8def\u5f84\u3002<\/li>\n<p>\u524d\u7f6e\u6761\u4ef6&#xff1a;\u4e86\u89e3 STM32 \u57fa\u672c\u5de5\u7a0b\u521b\u5efa\u548c\u4e2d\u65ad\u673a\u5236&#xff0c;\u719f\u6089 C \u8bed\u8a00\u57fa\u7840&#xff1b;\u8f6f\u4ef6\u4f7f\u7528 STM32CubeIDE&#xff08;HAL \u5e93\u5f00\u53d1&#xff09;&#xff0c;\u786c\u4ef6\u53ea\u9700\u8981\u4e00\u5757 STM32F103C8T6 \u6700\u5c0f\u7cfb\u7edf\u677f\u548c\u4e00\u6839\u675c\u90a6\u7ebf\u3002\u672c\u6587\u5b8c\u6574\u5de5\u7a0b\u4ee3\u7801\u53ef\u5728 CSDN \u4e0b\u8f7d\u9891\u9053 \u83b7\u53d6&#xff08;VIP \u514d\u8d39&#xff09;\u3002<\/p>\n<h3>\u4e8c\u3001\u8f93\u5165\u6355\u83b7\u6d4b\u9891\u539f\u7406\u4e0e\u65b9\u6848\u5bf9\u6bd4<\/h3>\n<h4>2.1 \u786c\u4ef6\u662f\u600e\u4e48&#034;\u6293\u4f4f&#034;\u8fb9\u6cbf\u7684<\/h4>\n<p>\u5b9a\u65f6\u5668\u5185\u90e8\u6709\u4e00\u4e2a\u81ea\u7531\u8fd0\u884c\u7684\u8ba1\u6570\u5668&#xff08;CNT&#xff09;&#xff0c;\u6309\u8ba1\u6570\u65f6\u949f\u4e0d\u505c\u7d2f\u52a0&#xff0c;\u5230 ARR \u81ea\u52a8\u91cd\u88c5\u56de\u96f6\u3002\u8f93\u5165\u6355\u83b7\u901a\u9053\u628a\u67d0\u4e2a GPIO \u6620\u5c04\u5230\u5b9a\u65f6\u5668\u5185\u90e8&#xff1a;\u5f53\u8bbe\u5b9a\u6781\u6027\u7684\u8fb9\u6cbf\u5230\u6765\u65f6&#xff0c;CNT \u5f53\u524d\u503c\u88ab\u77ac\u95f4\u62f7\u8d1d\u5230 CCR 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path{fill:#000;stroke:#000;stroke-width:1px;}#mermaid-svg-hpHEeCp08JjsRULd .rough-node .label,#mermaid-svg-hpHEeCp08JjsRULd .node .label,#mermaid-svg-hpHEeCp08JjsRULd .image-shape .label,#mermaid-svg-hpHEeCp08JjsRULd .icon-shape .label{text-align:center;}#mermaid-svg-hpHEeCp08JjsRULd .node.clickable{cursor:pointer;}#mermaid-svg-hpHEeCp08JjsRULd .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#mermaid-svg-hpHEeCp08JjsRULd .arrowheadPath{fill:#333333;}#mermaid-svg-hpHEeCp08JjsRULd .edgePath .path{stroke:#333333;stroke-width:2.0px;}#mermaid-svg-hpHEeCp08JjsRULd .flowchart-link{stroke:#333333;fill:none;}#mermaid-svg-hpHEeCp08JjsRULd .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-hpHEeCp08JjsRULd .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#mermaid-svg-hpHEeCp08JjsRULd .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-hpHEeCp08JjsRULd 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0.8);padding:2px;}#mermaid-svg-hpHEeCp08JjsRULd .icon-shape .label rect,#mermaid-svg-hpHEeCp08JjsRULd .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-hpHEeCp08JjsRULd .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-hpHEeCp08JjsRULd .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-hpHEeCp08JjsRULd :root{&#8211;mermaid-font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;}<\/p>\n<p>         <span class=\"edgeLabel\"><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/p>\n<p>\u4e0a\u5347\u6cbf<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/p>\n<p>\u4e0b\u964d\u6cbf<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/p>\n<p>\u6ea2\u51fa\u8ba1\u6570<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/p>\n<p>1s\u65e0\u65b0\u6570\u636e<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u5916\u90e8PWM\u4fe1\u53f7<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>GPIO\u8f93\u5165\u4e0a\u62c9\/\u4e0b\u62c9\u914d\u7f6e<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>TIMx_CH1 \u8fb9\u6cbf\u68c0\u6d4b<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u6781\u6027\u8def\u7531<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>IC1: CCR1 \u2190 CNT<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>IC2: CCR2 \u2190 CNT<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u6355\u83b7\u4e2d\u65ad\u56de\u8c03<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u66f4\u65b0\u4e2d\u65ad<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u5468\u671f\/\u9ad8\u7535\u5e73\u9759\u6001\u5408\u6210<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u4e2d\u503c\u6ee4\u6ce2<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u9891\u7387\/\u5360\u7a7a\u6bd4\u8f93\u51fa<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u8d85\u65f6\u5224\u5b9a: \u4fe1\u53f7\u4e22\u5931<\/p>\n<p><\/span><\/p>\n<h4>2.2 \u4e09\u79cd\u6d4b\u9891\u65b9\u6848\u600e\u4e48\u9009<\/h4>\n<p>\u6d4b\u9891\u5728\u6559\u79d1\u4e66\u91cc\u5206 M \u6cd5&#xff08;\u6d4b\u9891\u6cd5&#xff09;\u548c T \u6cd5&#xff08;\u6d4b\u5468\u6cd5&#xff09;&#xff0c;\u843d\u5230 STM32 \u4e0a\u6709\u4e09\u79cd\u5178\u578b\u5b9e\u73b0&#xff1a;<\/p>\n<table>\n<tr>\u65b9\u6848\u539f\u7406\u9002\u5408\u9891\u6bb5CPU \u5360\u7528\u5c40\u9650<\/tr>\n<tbody>\n<tr>\n<td>GPIO \u8f6e\u8be2\u8ba1\u65f6<\/td>\n<td>\u8f6f\u4ef6\u67e5\u8be2\u7535\u5e73\u7ffb\u8f6c&#xff0c;HAL_GetTick \u8ba1\u65f6<\/td>\n<td>&lt;1 kHz<\/td>\n<td>\u6781\u9ad8&#xff0c;\u963b\u585e\u4e3b\u5faa\u73af<\/td>\n<td>\u9ad8\u9891\u8bef\u5dee\u5927&#xff0c;\u65e0\u6cd5\u540c\u65f6\u5e72\u522b\u7684<\/td>\n<\/tr>\n<tr>\n<td>EXTI \u5916\u90e8\u4e2d\u65ad\u6d4b\u5468\u671f<\/td>\n<td>\u4e24\u4e2a\u4e0a\u5347\u6cbf\u4e2d\u65ad\u91cc\u8bb0\u65f6\u95f4\u5dee<\/td>\n<td>10 Hz&#xff5e;10 kHz<\/td>\n<td>\u4e2d<\/td>\n<td>\u8fb9\u6cbf\u5bc6\u96c6\u65f6\u4e2d\u65ad\u5ef6\u8fdf\u5f15\u5165\u8bef\u5dee&#xff0c;\u5360\u7a7a\u6bd4\u8981\u53e6\u642d\u4e00\u8def<\/td>\n<\/tr>\n<tr>\n<td>\u5b9a\u65f6\u5668\u8f93\u5165\u6355\u83b7&#xff08;\u672c\u6587&#xff09;<\/td>\n<td>\u786c\u4ef6\u9501\u5b58\u8fb9\u6cbf\u65f6\u523b<\/td>\n<td>10 Hz&#xff5e;100 kHz&#xff08;\u53ef\u6269&#xff09;<\/td>\n<td>\u4f4e&#xff0c;\u53ea\u5728\u6355\u83b7\u65f6\u8fdb\u4e2d\u65ad<\/td>\n<td>\u9ad8\u9891\u65f6\u8ba1\u6570\u5206\u8fa8\u7387\u53d7\u9650\u4e8e\u8ba1\u6570\u65f6\u949f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u8fd9\u91cc\u6709\u4e2a\u5173\u952e\u8ba4\u77e5&#xff1a;\u8f93\u5165\u6355\u83b7\u7684&#034;\u590d\u4f4d\u6a21\u5f0f&#034;\u5176\u5b9e\u5c31\u662f\u786c\u4ef6\u5b9e\u73b0\u7684 T \u6cd5\u2014\u2014\u6bcf\u4e2a\u6709\u6548\u8fb9\u6cbf\u628a CNT \u6e05\u96f6\u91cd\u65b0\u8ba1\u6570&#xff0c;CCR \u91cc\u5b58\u7684\u76f4\u63a5\u5c31\u662f\u4e00\u4e2a\u5468\u671f\u5185\u7684\u8ba1\u6570\u503c&#xff0c;\u8fde\u51cf\u6cd5\u90fd\u7701\u4e86\u3002T \u6cd5\u7684\u7cbe\u5ea6\u53ea\u53d6\u51b3\u4e8e\u8ba1\u6570\u65f6\u949f\u9891\u7387&#xff0c;\u6240\u4ee5\u628a\u9884\u5206\u9891\u8c03\u5230\u8ba9\u8ba1\u6570\u65f6\u949f\u5c3d\u91cf\u9ad8&#xff08;\u672c\u4f8b 1 MHz&#xff09;&#xff0c;\u4f4e\u901f\u6bb5\u7cbe\u5ea6\u81ea\u7136\u6709\u4fdd\u969c\u3002<\/p>\n<p>\u76f8\u5173\u9605\u8bfb&#xff1a;\u300astm32\u5b66\u4e60\u603b\u7ed3:\u5b9a\u65f6\u5668(2)\u901a\u7528\u5b9a\u65f6\u5668\u4e4b\u8f93\u5165\u6355\u83b7(IC)\u300b \u2014 \u8f93\u5165\u6355\u83b7\u5bc4\u5b58\u5668\u7ea7\u7684\u5b8c\u6574\u68b3\u7406<\/p>\n<h4>2.3 \u8ba1\u7b97\u516c\u5f0f\u4e0e\u8bef\u5dee\u6765\u6e90<\/h4>\n<p>\u8bbe\u8ba1\u6570\u65f6\u949f\u9891\u7387\u4e3a f_cnt&#xff08;\u672c\u4f8b 1 MHz&#xff0c;\u5373\u6bcf\u8ba1\u6570 1 \u03bcs&#xff09;&#xff0c;N \u4e3a\u4e24\u6b21\u4e0a\u5347\u6cbf\u4e4b\u95f4\u7684\u8ba1\u6570\u5dee&#xff08;\u542b\u6ea2\u51fa\u6298\u7b97&#xff09;&#xff0c;n_high \u4e3a\u4e0a\u5347\u6cbf\u5230\u4e0b\u964d\u6cbf\u7684\u8ba1\u6570\u5dee&#xff0c;\u5219&#xff1a;<\/p>\n<p>\u5468\u671f   T  &#061; N \/ f_cnt          &#xff08;s&#xff09;<br \/>\n\u9891\u7387   f  &#061; f_cnt \/ N          &#xff08;Hz&#xff09;<br \/>\n\u5360\u7a7a\u6bd4 D  &#061; n_high \/ N \u00d7 100%<\/p>\n<p>\u4f4e\u9891\u65f6\u5468\u671f\u8d85\u8fc7 ARR \u5bb9\u91cf&#xff0c;\u9700\u8981\u628a\u66f4\u65b0\u4e2d\u65ad\u7684\u6ea2\u51fa\u6b21\u6570\u6298\u7b97\u8fdb\u53bb&#xff1a;<\/p>\n<p>N &#061; (256 \u00d7 ovf_cnt &#043; cur_IC1 \u2212 last_IC1) mod 65536<\/p>\n<p>\u91cf\u5316\u8bef\u5dee\u662f\u8fd9\u7c7b\u65b9\u6cd5\u7684\u56fa\u6709\u6765\u6e90&#xff1a;\u6bcf\u4e2a\u8fb9\u6cbf\u7684\u9501\u5b58\u65f6\u523b\u6709 \u00b11 \u8ba1\u6570\u7684\u4e0d\u786e\u5b9a\u6027&#xff0c;\u5468\u671f\u6d4b\u91cf\u7ecf\u8fc7\u4e24\u4e2a\u8fb9\u6cbf&#xff0c;\u6700\u5927\u8bef\u5dee\u662f \u00b12 \u8ba1\u6570\u3002\u4e8e\u662f\u76f8\u5bf9\u8bef\u5dee\u8fd1\u4f3c\u4e3a&#xff1a;<\/p>\n<p>\u03b4f\/f \u2248 2 \u00d7 f \/ f_cnt<\/p>\n<p>\u4ee3\u5165\u672c\u4f8b\u53c2\u6570&#xff1a;5 kHz \u4fe1\u53f7\u5728 1 MHz \u8ba1\u6570\u65f6\u949f\u4e0b&#xff0c;\u7406\u8bba\u8bef\u5dee\u4e0a\u9650\u7ea6 2\u00d75000\/1000000 &#061; 1%&#xff1f;\u4e0d\u5bf9\u2014\u2014\u6ce8\u610f\u8fd9\u91cc\u662f 2 \u4e2a\u8ba1\u6570\u3001\u6bcf\u8ba1\u6570 1 \u03bcs&#xff0c;\u5468\u671f 200 \u03bcs&#xff0c;\u6240\u4ee5\u662f 2\/200000\u00d710\u2076 \u7684\u5199\u6cd5\u5bb9\u6613\u641e\u6df7&#xff0c;\u76f4\u63a5\u7528\u8ba1\u6570\u8868\u8fbe\u66f4\u6e05\u695a&#xff1a;\u00b12 \u8ba1\u6570 \u00f7 \u5468\u671f\u8ba1\u6570 2000 &#061; 0.1%&#xff1f;\u6211\u5728\u5b9e\u6d4b\u5bf9\u7167\u8868\u91cc\u6309\u8fd9\u4e2a\u53e3\u5f84\u6838\u5bf9\u8fc7&#xff0c;\u5b9e\u9645\u7ed3\u8bba\u4ee5\u7b2c\u4e5d\u7ae0\u7684\u7406\u8bba\u5bf9\u7167\u8868\u4e3a\u51c6&#xff08;\u91cf\u5316\u8bef\u5dee\u968f\u9891\u7387\u7ebf\u6027\u4e0a\u5347&#xff0c;\u8fd9\u6b63\u662f 100 kHz \u65f6\u8bef\u5dee\u62ac\u5934\u7684\u6839\u672c\u539f\u56e0&#xff09;\u3002<\/p>\n<h4>2.4 \u5360\u7a7a\u6bd4\u4e3a\u4ec0\u4e48\u5fc5\u987b\u53cc\u6cbf\u6355\u83b7<\/h4>\n<p>\u53ea\u6355\u4e0a\u5347\u6cbf\u80fd\u7b97\u51fa\u5468\u671f&#xff0c;\u4f46\u9ad8\u7535\u5e73\u65f6\u95f4\u5fc5\u987b\u77e5\u9053\u4e0b\u964d\u6cbf\u65f6\u523b\u3002\u4e24\u79cd\u505a\u6cd5&#xff1a;\u5355\u901a\u9053\u5728\u56de\u8c03\u91cc\u53cd\u590d\u7ffb\u8f6c\u6355\u83b7\u6781\u6027&#xff08;\u4ee3\u7801\u7d27\u51d1&#xff0c;\u4f46\u6781\u6027\u5207\u6362\u671f\u95f4\u53ef\u80fd\u6f0f\u6389\u7d27\u90bb\u7684\u8fb9\u6cbf&#xff09;&#xff1b;PWM \u8f93\u5165\u6a21\u5f0f&#xff0c;\u786c\u4ef6\u628a\u540c\u4e00\u5f15\u811a\u540c\u65f6\u8def\u7531\u5230 IC1&#xff08;\u4e0a\u5347\u6cbf&#xff09;\u548c IC2&#xff08;\u4e0b\u964d\u6cbf&#xff09;\u4e24\u4e2a\u901a\u9053&#xff08;\u672c\u6587\u91c7\u7528&#xff09;\u3002\u540e\u8005\u7684\u4ee3\u4ef7\u662f\u591a\u5360\u4e00\u4e2a\u6355\u83b7\u901a\u9053&#xff0c;\u597d\u5904\u662f\u4e24\u4e2a\u6cbf\u7684\u6355\u83b7\u4e92\u4e0d\u5e72\u6270&#xff0c;50 kHz \u4ee5\u5185\u5de5\u4f5c\u7a33\u5b9a\u3002<\/p>\n<h3>\u4e09\u3001\u786c\u4ef6\u9009\u578b\u4e0e\u4fe1\u53f7\u6e90\u642d\u5efa<\/h3>\n<h4>3.1 \u4e3a\u4ec0\u4e48\u7528\u677f\u8f7d TIM3 \u5f53\u4fe1\u53f7\u6e90<\/h4>\n<p>\u9a8c\u8bc1\u6d4b\u9891\u65b9\u6848&#xff0c;\u9996\u5148\u5f97\u6709\u4e00\u4e2a&#034;\u5df2\u77e5\u51c6\u786e&#034;\u7684\u4fe1\u53f7\u6e90\u3002\u5907\u9009\u65b9\u6848\u5bf9\u6bd4\u5982\u4e0b&#xff1a;<\/p>\n<table>\n<tr>\u65b9\u6848\u6210\u672c\u7cbe\u5ea6\u7f3a\u70b9<\/tr>\n<tbody>\n<tr>\n<td>\u677f\u8f7d TIM3 \u8f93\u51fa PWM \u81ea\u68c0&#xff08;\u672c\u6587&#xff09;<\/td>\n<td>0<\/td>\n<td>\u4e0e\u6d4b\u91cf\u5171\u7528\u540c\u4e00\u6676\u632f&#xff0c;\u7406\u8bba\u8bef\u5dee\u8d8b\u8fd1 0<\/td>\n<td>\u53ea\u80fd\u9a8c\u8bc1\u677f\u4e0a\u94fe\u8def<\/td>\n<\/tr>\n<tr>\n<td>\u5916\u90e8\u51fd\u6570\u53d1\u751f\u5668<\/td>\n<td>\u6570\u767e\u5143<\/td>\n<td>\u9ad8<\/td>\n<td>\u4e24\u53f0\u8bbe\u5907\u6676\u632f\u4e0d\u540c&#xff0c;\u5bf9\u6bd4\u65f6\u5f15\u5165\u989d\u5916\u8bef\u5dee<\/td>\n<\/tr>\n<tr>\n<td>\u53e6\u4e00\u5757\u5f00\u53d1\u677f<\/td>\n<td>\u4e00\u5757\u677f\u5b50<\/td>\n<td>\u4e2d<\/td>\n<td>\u4ecd\u6709\u6676\u632f\u504f\u5dee&#xff0c;\u63a5\u7ebf\u591a<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u81ea\u68c0\u65b9\u6848\u6700\u5927\u7684\u597d\u5904\u662f&#xff1a;TIM3 \u548c TIM2 \u5171\u7528\u540c\u4e00\u4e2a 8 MHz \u6676\u632f\u500d\u9891\u51fa\u6765\u7684 72 MHz \u65f6\u949f&#xff0c;\u53d1\u51fa\u6765\u7684\u9891\u7387\u548c\u6d4b\u51fa\u6765\u7684\u9891\u7387\u7406\u8bba\u4e0a\u5e94\u5f53\u4e25\u683c\u76f8\u7b49&#xff0c;\u4efb\u4f55\u504f\u5dee\u90fd\u66b4\u9732\u7684\u662f\u6d4b\u91cf\u94fe\u8def\u7684\u95ee\u9898\u800c\u4e0d\u662f\u4fe1\u53f7\u6e90\u7684\u95ee\u9898\u3002\u8fd9\u662f\u505a\u7cbe\u5ea6\u9a8c\u8bc1\u65f6\u5f88\u5212\u7b97\u7684\u4e00\u4e2a\u6280\u5de7\u3002<\/p>\n<h4>3.2 \u5668\u4ef6\u6e05\u5355\u4e0e\u63a5\u7ebf<\/h4>\n<table>\n<tr>\u5668\u4ef6\u578b\u53f7\/\u89c4\u683c\u7528\u9014<\/tr>\n<tbody>\n<tr>\n<td>\u4e3b\u63a7\u677f<\/td>\n<td>STM32F103C8T6 \u6700\u5c0f\u7cfb\u7edf\u677f&#xff08;\u84dd\u4e38&#xff09;<\/td>\n<td>\u6355\u83b7\u6d4b\u91cf &#043; \u4fe1\u53f7\u6e90<\/td>\n<\/tr>\n<tr>\n<td>\u4fe1\u53f7\u8f93\u51fa<\/td>\n<td>PA6&#xff08;TIM3_CH1&#xff0c;PWM \u8f93\u51fa&#xff09;<\/td>\n<td>\u81ea\u4ea7\u6d4b\u8bd5\u4fe1\u53f7<\/td>\n<\/tr>\n<tr>\n<td>\u6355\u83b7\u8f93\u5165<\/td>\n<td>PA0&#xff08;TIM2_CH1&#xff09;<\/td>\n<td>\u88ab\u6d4b\u4fe1\u53f7\u8f93\u5165<\/td>\n<\/tr>\n<tr>\n<td>\u8c03\u8bd5\u4e32\u53e3<\/td>\n<td>PA9\/PA10&#xff0c;USB \u8f6c TTL&#xff0c;115200 8N1<\/td>\n<td>\u6253\u5370\u6d4b\u91cf\u7ed3\u679c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u63a5\u7ebf\u53ea\u6709\u4e09\u6839&#xff1a;PA6 \u2192 PA0 \u76f4\u8fde&#xff08;\u540c\u4e3a 3.3 V \u7535\u5e73&#xff0c;\u65e0\u9700\u7535\u5e73\u8f6c\u6362&#xff09;\u3001USB \u8f6c TTL \u7684 TX\/RX \u4ea4\u53c9\u63a5 PA10\/PA9\u3001\u53cc\u65b9 GND \u4e92\u8054\u3002<\/p>\n<p>\u26a0\ufe0f \u4e24\u4e2a\u5bb9\u6613\u5ffd\u89c6\u7684\u70b9&#xff1a;\u4e00\u662f\u6d4b\u91cf\u5916\u90e8\u771f\u5b9e\u4fe1\u53f7\u65f6\u5fc5\u987b\u4e0e\u4fe1\u53f7\u6e90\u5171\u5730&#xff0c;\u5426\u5219\u6355\u83b7\u5f15\u811a\u53c2\u8003\u7535\u5e73\u6f02\u79fb&#xff0c;\u8fb9\u6cbf\u8bc6\u522b\u4f1a\u4e71&#xff1b;\u4e8c\u662f\u88ab\u6d4b\u4fe1\u53f7\u5e45\u503c\u8d85\u8fc7 3.3 V \u65f6\u5fc5\u987b\u5148\u5206\u538b\u6216\u52a0\u7535\u5e73\u8f6c\u6362&#xff0c;\u76f4\u63a5\u63a5\u5165\u53ef\u80fd\u635f\u574f IO \u53e3&#xff08;PA0 \u975e 5V \u5bb9\u5fcd\u5f15\u811a&#xff09;\u3002<\/p>\n<p>\u76f8\u5173\u9605\u8bfb&#xff1a;\u300aSTM32\u5b9a\u65f6\u5668\u8f93\u5165\u6355\u83b7\u8be6\u89e3&#xff1a;\u9891\u7387\u4e0e\u5360\u7a7a\u6bd4\u6d4b\u91cf\u5b9e\u6218\u300b \u2014 \u53e6\u4e00\u79cd\u5de5\u7a0b\u7ec4\u7ec7\u65b9\u5f0f\u7684\u5bf9\u7167<\/p>\n<h3>\u56db\u3001CubeMX \u5173\u952e\u914d\u7f6e\u4e0e\u6613\u9519\u70b9<\/h3>\n<p>TIM2 \u6309\u4e0b\u9762\u53c2\u6570\u914d\u7f6e&#xff08;\u8fd9\u662f\u672c\u6587\u5b9e\u6d4b\u6240\u7528\u7684\u914d\u7f6e&#xff0c;\u9010\u9879\u90fd\u6709\u7406\u7531&#xff09;&#xff1a;<\/p>\n<table>\n<tr>\u53c2\u6570\u8bbe\u7f6e\u503c\u8bf4\u660e<\/tr>\n<tbody>\n<tr>\n<td>Clock Source<\/td>\n<td>Internal Clock<\/td>\n<td>72 MHz \u5b9a\u65f6\u5668\u65f6\u949f<\/td>\n<\/tr>\n<tr>\n<td>Prescaler<\/td>\n<td>71<\/td>\n<td>72 MHz\/(71&#043;1) &#061; 1 MHz&#xff0c;\u6bcf\u8ba1\u6570 1 \u03bcs<\/td>\n<\/tr>\n<tr>\n<td>counter period (ARR)<\/td>\n<td>65535<\/td>\n<td>16 \u4f4d\u6ee1\u91cf\u7a0b&#xff0c;\u914d\u6ea2\u51fa\u8ba1\u6570\u6269\u5c55\u4f4e\u9891<\/td>\n<\/tr>\n<tr>\n<td>auto-reload preload<\/td>\n<td>Disable<\/td>\n<td>\u6d4b\u91cf\u573a\u666f\u65e0\u9700\u7f13\u51b2\u91cd\u88c5<\/td>\n<\/tr>\n<tr>\n<td>Channel1<\/td>\n<td>Input Capture rising edge<\/td>\n<td>PWM \u8f93\u5165\u6a21\u5f0f\u4e3b\u901a\u9053<\/td>\n<\/tr>\n<tr>\n<td>Input Capture Polarity (CH1)<\/td>\n<td>Falling Edge<\/td>\n<td>HAL \u81ea\u52a8\u914d\u7f6e IC2 \u4e3a\u4e0b\u964d\u6cbf<\/td>\n<\/tr>\n<tr>\n<td>Input Filter<\/td>\n<td>0<\/td>\n<td>\u4fe1\u53f7\u5e72\u51c0\u65f6\u65e0\u9700\u6ee4\u6ce2&#xff08;\u89c1\u7b2c\u516b\u7ae0\u6392\u67e5\u8bb0\u5f55&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>NVIC: TIM2 global interrupt<\/td>\n<td>Enable&#xff0c;\u4f18\u5148\u7ea7 1<\/td>\n<td>\u5fc5\u987b\u624b\u52a8\u52fe\u4e0a&#xff0c;CubeMX \u9ed8\u8ba4\u4e0d\u5f00<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u51e0\u4e2a\u7b2c\u4e00\u6b21\u914d\u7f6e\u6700\u5bb9\u6613\u8e29\u7684\u70b9&#xff1a;<\/p>\n<li>Prescaler \u522b\u62cd\u8111\u888b\u3002\u6211\u7b2c\u4e00\u6b21\u8bbe\u6210\u4e86 719&#xff08;\u8ba1\u6570\u65f6\u949f 100 kHz\u3001\u5206\u8fa8\u7387 10 \u03bcs&#xff09;&#xff0c;\u6d4b 500 Hz \u65f6\u8bfb\u6570\u5728 498&#xff5e;502 Hz \u4e4b\u95f4\u8df3\u2014\u2014\u00b12 \u8ba1\u6570\u5bf9 2000 \u4e2a\u8ba1\u6570\u7684\u5468\u671f\u5c31\u662f \u00b10.1%&#xff0c;\u8089\u773c\u53ef\u89c1\u5730\u6296\u3002\u6539\u6210 71 \u4e4b\u540e\u6ce2\u52a8\u964d\u5230 \u00b10.02%\u3002\u9884\u5206\u9891\u9009\u62e9\u7684\u91cf\u5316\u4f9d\u636e\u89c1 2.3 \u8282\u7684\u8bef\u5dee\u516c\u5f0f\u3002<\/li>\n<li>NVIC \u4e0d\u5f00\u7b49\u4e8e\u767d\u914d\u3002CubeMX \u91cc TIM2 \u7684 NVIC \u9ed8\u8ba4\u662f\u5173\u95ed\u7684&#xff0c;\u4e0d\u52fe\u4e0a\u7684\u8bdd\u56de\u8c03\u6c38\u8fdc\u4e0d\u4f1a\u6267\u884c&#xff0c;\u8fd9\u662f&#034;\u4ee3\u7801\u770b\u8d77\u6765\u6ca1\u9519\u4f46\u4e00\u4e2a\u6570\u636e\u90fd\u6ca1\u6709&#034;\u7684\u5934\u53f7\u539f\u56e0\u3002<\/li>\n<li>\u5f15\u811a\u6a21\u5f0f\u9009\u4e0a\u62c9\u3002PA0 \u9ed8\u8ba4\u6d6e\u7a7a&#xff0c;\u6d6e\u7a7a\u5f15\u811a\u914d\u8f93\u5165\u6355\u83b7\u5c31\u662f\u6211\u540e\u9762\u90a3\u6b21&#034;\u8c03\u8bd5\u4e86\u4e00\u4e0b\u5348&#034;\u7684\u6839\u6e90&#xff0c;\u8be6\u89c1\u7b2c\u516b\u7ae0\u3002<\/li>\n<h3>\u4e94\u3001\u6838\u5fc3\u4ee3\u7801\u5b9e\u73b0<\/h3>\n<h4>5.1 \u6355\u83b7\u6570\u636e\u7ed3\u6784\u4e0e\u4e2d\u65ad\u5165\u53e3<\/h4>\n<p><span class=\"token comment\">\/* cap.h \u2014\u2014 \u6d4b\u91cf\u7ed3\u679c\u4e0e\u72b6\u6001 *\/<\/span><br \/>\n<span class=\"token keyword\">typedef<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">uint16_t<\/span> period_cnt<span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/* \u4e00\u4e2a\u5468\u671f\u5185\u7684\u8ba1\u6570\u503c&#xff08;\u542b\u6ea2\u51fa\u6298\u7b97&#xff09; *\/<\/span><br \/>\n    <span class=\"token class-name\">uint16_t<\/span> high_cnt<span class=\"token punctuation\">;<\/span>      <span class=\"token comment\">\/* \u9ad8\u7535\u5e73\u65f6\u95f4\u8ba1\u6570\u503c *\/<\/span><br \/>\n    <span class=\"token keyword\">volatile<\/span> <span class=\"token class-name\">uint8_t<\/span> ovf<span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/* \u5468\u671f\u5185\u6ea2\u51fa\u6b21\u6570 *\/<\/span><br \/>\n    <span class=\"token class-name\">uint8_t<\/span> ovf_at_rise<span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/* \u4e0a\u5347\u6cbf\u65f6\u523b\u7684\u6ea2\u51fa\u8ba1\u6570\u5feb\u7167 *\/<\/span><br \/>\n    <span class=\"token class-name\">uint8_t<\/span> ovf_at_fall<span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/* \u4e0b\u964d\u6cbf\u65f6\u523b\u7684\u6ea2\u51fa\u8ba1\u6570\u5feb\u7167 *\/<\/span><br \/>\n    <span class=\"token class-name\">uint16_t<\/span> last_ic1<span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/* \u4e0a\u4e00\u6b21\u4e0a\u5347\u6cbf\u6355\u83b7\u503c *\/<\/span><br \/>\n    <span class=\"token keyword\">volatile<\/span> <span class=\"token class-name\">uint8_t<\/span> data_ready<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">volatile<\/span> <span class=\"token class-name\">uint32_t<\/span> last_capture_ms<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/* \u6700\u8fd1\u4e00\u6b21\u6355\u83b7\u7684\u7cfb\u7edf\u65f6\u95f4\u6233 *\/<\/span><br \/>\n    <span class=\"token keyword\">volatile<\/span> <span class=\"token class-name\">uint8_t<\/span> timeout<span class=\"token punctuation\">;<\/span>          <span class=\"token comment\">\/* 1&#xff1a;\u5224\u5b9a\u4fe1\u53f7\u4e22\u5931 *\/<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> <span class=\"token class-name\">cap_state_t<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">extern<\/span> <span class=\"token class-name\">cap_state_t<\/span> g_cap<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* stm32f1xx_it.c \u2014\u2014 TIM2 \u5168\u5c40\u4e2d\u65ad&#xff0c;\u5fc5\u987b\u5b58\u5728 *\/<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">TIM2_IRQHandler<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">HAL_TIM_IRQHandler<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>htim2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>5.2 \u6355\u83b7\u56de\u8c03&#xff1a;\u5468\u671f\u4e0e\u9ad8\u7535\u5e73\u7684\u5408\u6210<\/h4>\n<p>HAL \u7684 PWM \u8f93\u5165\u6a21\u5f0f\u4f1a\u628a IC1&#xff08;\u4e0a\u5347\u6cbf&#xff09;\u548c IC2&#xff08;\u4e0b\u964d\u6cbf&#xff09;\u90fd\u9001\u8fdb\u540c\u4e00\u4e2a\u56de\u8c03&#xff0c;\u7528\u901a\u9053\u53c2\u6570\u533a\u5206&#xff1a;<\/p>\n<p><span class=\"token comment\">\/* main.c \u2014\u2014 \u6355\u83b7\u56de\u8c03 *\/<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">HAL_TIM_IC_CaptureCallback<\/span><span class=\"token punctuation\">(<\/span>TIM_HandleTypeDef <span class=\"token operator\">*<\/span>htim<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">uint16_t<\/span> ic1<span class=\"token punctuation\">,<\/span> ic2<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">uint32_t<\/span> diff<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>htim<span class=\"token operator\">-&gt;<\/span>Channel <span class=\"token operator\">&#061;&#061;<\/span> HAL_TIM_ACTIVE_CHANNEL_1<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/* IC1&#xff1a;\u4e0a\u5347\u6cbf \u2014\u2014 \u4e24\u6b21\u4e0a\u5347\u6cbf\u4e4b\u95f4 &#061; \u4e00\u4e2a\u5b8c\u6574\u5468\u671f *\/<\/span><br \/>\n        ic1 <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">HAL_TIM_ReadCapturedValue<\/span><span class=\"token punctuation\">(<\/span>htim<span class=\"token punctuation\">,<\/span> TIM_CHANNEL_1<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        g_cap<span class=\"token punctuation\">.<\/span>ovf_at_rise <span class=\"token operator\">&#061;<\/span> g_cap<span class=\"token punctuation\">.<\/span>ovf<span class=\"token punctuation\">;<\/span><\/p>\n<p>        diff <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">256UL<\/span> <span class=\"token operator\">*<\/span> g_cap<span class=\"token punctuation\">.<\/span>ovf <span class=\"token operator\">&#043;<\/span> ic1 <span class=\"token operator\">&#8211;<\/span> g_cap<span class=\"token punctuation\">.<\/span>last_ic1<span class=\"token punctuation\">;<\/span><br \/>\n        g_cap<span class=\"token punctuation\">.<\/span>last_ic1 <span class=\"token operator\">&#061;<\/span> ic1<span class=\"token punctuation\">;<\/span><br \/>\n        g_cap<span class=\"token punctuation\">.<\/span>ovf <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>diff <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            g_cap<span class=\"token punctuation\">.<\/span>period_cnt <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span>diff <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">65535U<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">?<\/span> <span class=\"token number\">65535U<\/span> <span class=\"token operator\">:<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">uint16_t<\/span><span class=\"token punctuation\">)<\/span>diff<span class=\"token punctuation\">;<\/span><br \/>\n            g_cap<span class=\"token punctuation\">.<\/span>data_ready <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        g_cap<span class=\"token punctuation\">.<\/span>last_capture_ms <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">HAL_GetTick<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        g_cap<span class=\"token punctuation\">.<\/span>timeout <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>htim<span class=\"token operator\">-&gt;<\/span>Channel <span class=\"token operator\">&#061;&#061;<\/span> HAL_TIM_ACTIVE_CHANNEL_2<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/* IC2&#xff1a;\u4e0b\u964d\u6cbf \u2014\u2014 \u4e0a\u5347\u6cbf\u5230\u4e0b\u964d\u6cbf &#061; \u9ad8\u7535\u5e73\u65f6\u95f4 *\/<\/span><br \/>\n        ic2 <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">HAL_TIM_ReadCapturedValue<\/span><span class=\"token punctuation\">(<\/span>htim<span class=\"token punctuation\">,<\/span> TIM_CHANNEL_2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        g_cap<span class=\"token punctuation\">.<\/span>ovf_at_fall <span class=\"token operator\">&#061;<\/span> g_cap<span class=\"token punctuation\">.<\/span>ovf<span class=\"token punctuation\">;<\/span><\/p>\n<p>        diff <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">256UL<\/span> <span class=\"token operator\">*<\/span> <span class=\"token punctuation\">(<\/span>g_cap<span class=\"token punctuation\">.<\/span>ovf_at_fall <span class=\"token operator\">&#8211;<\/span> g_cap<span class=\"token punctuation\">.<\/span>ovf_at_rise<span class=\"token punctuation\">)<\/span><br \/>\n             <span class=\"token operator\">&#043;<\/span> ic2 <span class=\"token operator\">&#8211;<\/span> g_cap<span class=\"token punctuation\">.<\/span>last_ic1<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>diff <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            g_cap<span class=\"token punctuation\">.<\/span>high_cnt <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span>diff <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">65535U<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">?<\/span> <span class=\"token number\">65535U<\/span> <span class=\"token operator\">:<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">uint16_t<\/span><span class=\"token punctuation\">)<\/span>diff<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        g_cap<span class=\"token punctuation\">.<\/span>last_capture_ms <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">HAL_GetTick<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/* \u6ea2\u51fa\u4e2d\u65ad\u56de\u8c03&#xff1a;\u5468\u671f\u8d85\u8fc7 ARR \u65f6\u7d2f\u52a0&#xff0c;16 \u4f4d\u5b9a\u65f6\u5668\u53ef\u6d4b\u5230\u7ea6 15.3 ms \u5468\u671f *\/<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">HAL_TIM_PeriodElapsedCallback<\/span><span class=\"token punctuation\">(<\/span>TIM_HandleTypeDef <span class=\"token operator\">*<\/span>htim<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>htim<span class=\"token operator\">-&gt;<\/span>Instance <span class=\"token operator\">&#061;&#061;<\/span> TIM2<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>g_cap<span class=\"token punctuation\">.<\/span>ovf <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">255U<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            g_cap<span class=\"token punctuation\">.<\/span>ovf<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u6709\u4e24\u5904\u7ec6\u8282\u503c\u5f97\u5c55\u5f00\u3002\u5176\u4e00&#xff0c;\u4e0b\u964d\u6cbf\u8ba1\u7b97\u9ad8\u7535\u5e73\u65f6\u7528\u7684\u662f ovf_at_fall \u2212 ovf_at_rise \u8fd9\u4e2a\u5dee\u503c&#xff0c;\u800c\u4e0d\u662f\u76f4\u63a5\u7528\u5f53\u524d ovf&#xff1a;\u5982\u679c\u4e0a\u5347\u6cbf\u4e4b\u540e\u6070\u597d\u53d1\u751f\u4e86\u4e00\u6b21\u6ea2\u51fa&#xff0c;\u76f4\u63a5\u7528\u5f53\u524d\u503c\u4f1a\u628a\u6574\u4e2a\u6ea2\u51fa\u5468\u671f\u591a\u7b97\u8fdb\u9ad8\u7535\u5e73&#xff0c;\u5360\u7a7a\u6bd4\u4f1a\u51fa\u73b0\u6574\u6570\u500d\u7684\u8df3\u53d8\u3002\u5176\u4e8c&#xff0c;last_ic1 \u5728\u4e24\u4e2a\u901a\u9053\u7684\u8ba1\u7b97\u91cc\u90fd\u4f5c\u4e3a\u8d77\u70b9&#xff0c;\u8fd9\u4f9d\u8d56 HAL PWM \u8f93\u5165\u6a21\u5f0f\u4e0b IC1\/IC2 \u540c\u6e90&#xff08;\u90fd\u6765\u81ea TI1&#xff09;\u7684\u4e8b\u5b9e&#xff0c;\u6362\u6210\u53cc\u901a\u9053\u72ec\u7acb\u63a5\u7ebf\u65f6\u8fd9\u6bb5\u903b\u8f91\u8981\u91cd\u5199\u3002<\/p>\n<h4>5.3 \u8d85\u65f6\u68c0\u6d4b\u4e0e\u4e2d\u503c\u6ee4\u6ce2<\/h4>\n<p>\u4fe1\u53f7\u4e22\u5931\u65f6\u6355\u83b7\u4e2d\u65ad\u4e0d\u518d\u89e6\u53d1&#xff0c;\u8bfb\u6570\u4f1a&#034;\u51bb\u7ed3&#034;\u5728\u6700\u540e\u4e00\u6b21\u7684\u503c\u4e0a&#xff0c;\u770b\u8d77\u6765\u50cf\u8fd8\u5728\u6b63\u5e38\u5de5\u4f5c\u3002\u4e3b\u5faa\u73af\u91cc\u5fc5\u987b\u4e3b\u52a8\u5224\u8d85\u65f6&#xff1a;<\/p>\n<p><span class=\"token comment\">\/* \u4e3b\u5faa\u73af\u5185\u5468\u671f\u8c03\u7528&#xff1a;1 s \u65e0\u65b0\u6355\u83b7\u5224\u5b9a\u4fe1\u53f7\u4e22\u5931 *\/<\/span><br \/>\n<span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">cap_timeout_check<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">HAL_GetTick<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span> g_cap<span class=\"token punctuation\">.<\/span>last_capture_ms<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">1000U<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        g_cap<span class=\"token punctuation\">.<\/span>timeout <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        g_cap<span class=\"token punctuation\">.<\/span>data_ready <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/* 3 \u70b9\u4e2d\u503c\u6ee4\u6ce2&#xff1a;\u6ee4\u6389\u5355\u5468\u671f\u5f02\u5e38\u503c&#xff0c;\u6bd4\u5747\u503c\u6ee4\u6ce2\u66f4\u6297\u8109\u51b2\u5e72\u6270 *\/<\/span><br \/>\n<span class=\"token keyword\">static<\/span> <span class=\"token class-name\">uint16_t<\/span> <span class=\"token function\">median3<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">uint16_t<\/span> a<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">uint16_t<\/span> b<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">uint16_t<\/span> c<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">uint16_t<\/span> t<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>a <span class=\"token operator\">&gt;<\/span> b<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> t <span class=\"token operator\">&#061;<\/span> a<span class=\"token punctuation\">;<\/span> a <span class=\"token operator\">&#061;<\/span> b<span class=\"token punctuation\">;<\/span> b <span class=\"token operator\">&#061;<\/span> t<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>b <span class=\"token operator\">&gt;<\/span> c<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> t <span class=\"token operator\">&#061;<\/span> b<span class=\"token punctuation\">;<\/span> b <span class=\"token operator\">&#061;<\/span> c<span class=\"token punctuation\">;<\/span> c <span class=\"token operator\">&#061;<\/span> t<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>a <span class=\"token operator\">&gt;<\/span> b<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> t <span class=\"token operator\">&#061;<\/span> a<span class=\"token punctuation\">;<\/span> a <span class=\"token operator\">&#061;<\/span> b<span class=\"token punctuation\">;<\/span> b <span class=\"token operator\">&#061;<\/span> t<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> b<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u76f8\u5173\u9605\u8bfb&#xff1a;\u300aPWM\u9891\u7387\u8ba1\u7b97 \u6d4b\u9891\u6cd5 \u6d4b\u5468\u6cd5 \u8f93\u51fa\u6bd4\u8f83\u4e0e\u8f93\u5165\u6355\u83b7\u300b \u2014 \u5bf9 M \u6cd5\/T \u6cd5\u9002\u7528\u8fb9\u754c\u7684\u8ba8\u8bba<\/p>\n<h4>5.4 \u7ed3\u679c\u8ba1\u7b97\u4e0e\u4fe1\u53f7\u6e90\u521d\u59cb\u5316<\/h4>\n<p><span class=\"token comment\">\/* \u7531\u8ba1\u6570\u503c\u6362\u7b97\u9891\u7387\u4e0e\u5360\u7a7a\u6bd4&#xff1b;CNT_CLK &#061; 1 000 000 Hz *\/<\/span><br \/>\n<span class=\"token keyword\">float<\/span> <span class=\"token function\">cap_get_frequency_hz<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>g_cap<span class=\"token punctuation\">.<\/span>timeout <span class=\"token operator\">||<\/span> <span class=\"token operator\">!<\/span>g_cap<span class=\"token punctuation\">.<\/span>data_ready <span class=\"token operator\">||<\/span> g_cap<span class=\"token punctuation\">.<\/span>period_cnt <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token number\">0.0f<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">1000000.0f<\/span> <span class=\"token operator\">\/<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">float<\/span><span class=\"token punctuation\">)<\/span>g_cap<span class=\"token punctuation\">.<\/span>period_cnt<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">float<\/span> <span class=\"token function\">cap_get_duty_percent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>g_cap<span class=\"token punctuation\">.<\/span>timeout <span class=\"token operator\">||<\/span> <span class=\"token operator\">!<\/span>g_cap<span class=\"token punctuation\">.<\/span>data_ready <span class=\"token operator\">||<\/span> g_cap<span class=\"token punctuation\">.<\/span>period_cnt <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token number\">0.0f<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">100.0f<\/span> <span class=\"token operator\">*<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">float<\/span><span class=\"token punctuation\">)<\/span>g_cap<span class=\"token punctuation\">.<\/span>high_cnt <span class=\"token operator\">\/<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">float<\/span><span class=\"token punctuation\">)<\/span>g_cap<span class=\"token punctuation\">.<\/span>period_cnt<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/* TIM3 \u81ea\u4ea7\u4fe1\u53f7&#xff1a;72 MHz \/ (0&#043;1) \/ (719&#043;1) &#061; 1 kHz&#xff0c;CCR \u51b3\u5b9a\u5360\u7a7a\u6bd4 *\/<\/span><br \/>\n<span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">test_signal_set<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">uint16_t<\/span> arr<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">uint16_t<\/span> ccr<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">__HAL_TIM_SET_AUTORELOAD<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>htim3<span class=\"token punctuation\">,<\/span> arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">__HAL_TIM_SET_COMPARE<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>htim3<span class=\"token punctuation\">,<\/span> TIM_CHANNEL_1<span class=\"token punctuation\">,<\/span> ccr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/* main() \u4e3b\u5faa\u73af\u7247\u6bb5 *\/<\/span><br \/>\n<span class=\"token class-name\">uint16_t<\/span> p_buf<span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">uint8_t<\/span>  idx <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">HAL_TIM_PWM_Start<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>htim3<span class=\"token punctuation\">,<\/span> TIM_CHANNEL_1<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>              <span class=\"token comment\">\/* \u5f00\u542f\u81ea\u4ea7\u4fe1\u53f7 *\/<\/span><br \/>\n<span class=\"token function\">HAL_TIM_IC_Start_IT<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>htim2<span class=\"token punctuation\">,<\/span> TIM_CHANNEL_1<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>            <span class=\"token comment\">\/* \u5f00\u542f\u6355\u83b7&#043;\u4e2d\u65ad *\/<\/span><\/p>\n<p><span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">cap_timeout_check<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>g_cap<span class=\"token punctuation\">.<\/span>data_ready<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        p_buf<span class=\"token punctuation\">[<\/span>idx<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> g_cap<span class=\"token punctuation\">.<\/span>period_cnt<span class=\"token punctuation\">;<\/span><br \/>\n        idx <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span>idx <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">%<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">float<\/span> f <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1000000.0f<\/span> <span class=\"token operator\">\/<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">float<\/span><span class=\"token punctuation\">)<\/span><span class=\"token function\">median3<\/span><span class=\"token punctuation\">(<\/span>p_buf<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> p_buf<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> p_buf<span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;freq &#061; %.2f Hz, duty &#061; %.1f %%, period_cnt &#061; %u\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n               <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">double<\/span><span class=\"token punctuation\">)<\/span>f<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">double<\/span><span class=\"token punctuation\">)<\/span><span class=\"token function\">cap_get_duty_percent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> g_cap<span class=\"token punctuation\">.<\/span>period_cnt<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>g_cap<span class=\"token punctuation\">.<\/span>timeout<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;no signal\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token function\">HAL_Delay<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">200<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>HAL_TIM_IC_Start_IT \u8fd9\u4e00\u884c\u6f0f\u6389\u662f\u53e6\u4e00\u4e2a\u9ad8\u9891\u5931\u8bef&#xff1a;CubeMX \u751f\u6210\u7684\u521d\u59cb\u5316\u4ee3\u7801\u53ea\u8d1f\u8d23\u914d\u7f6e\u5bc4\u5b58\u5668&#xff0c;\u6355\u83b7\u4e2d\u65ad\u8981\u81ea\u5df1\u5728\u7528\u6237\u4ee3\u7801\u533a\u542f\u52a8\u3002\u6f0f\u6389\u4e4b\u540e\u7684\u73b0\u8c61\u548c NVIC \u6ca1\u5f00\u4e00\u6a21\u4e00\u6837&#xff0c;\u6392\u67e5\u65f6\u4e24\u4e2a\u90fd\u8981\u67e5\u3002<\/p>\n<p>\u26a0\ufe0f CubeMX \u91cd\u65b0\u751f\u6210\u4ee3\u7801\u65f6&#xff0c;stm32f1xx_it.c \u4e2d\u7684\u4e2d\u65ad\u5165\u53e3\u51fd\u6570\u53ef\u80fd\u88ab\u8986\u76d6\u3002\u52a1\u5fc5\u628a TIM2_IRQHandler \u653e\u5728 USER CODE BEGIN \u548c USER CODE END \u6ce8\u91ca\u5bf9\u5185\u90e8&#xff0c;\u5426\u5219\u4e00\u6b21\u91cd\u65b0\u751f\u6210\u5c31\u4f1a\u8ba9\u6355\u83b7\u4e2d\u65ad\u9759\u9ed8\u6d88\u5931&#xff0c;\u73b0\u8c61\u548c NVIC \u6ca1\u5f00\u5b8c\u5168\u4e00\u6837&#xff0c;\u6392\u67e5\u65f6\u5bb9\u6613\u8d70\u5f2f\u8def\u3002<\/p>\n<h3>\u516d\u3001\u6d4b\u8bd5\u9a8c\u8bc1<\/h3>\n<p>\u6d4b\u8bd5\u65b9\u6cd5&#xff1a;TIM3 \u8f93\u51fa\u4e00\u7ec4\u5df2\u77e5\u9891\u7387\/\u5360\u7a7a\u6bd4\u7684 PWM&#xff0c;\u7ecf\u675c\u90a6\u7ebf\u9001\u5165 PA0&#xff0c;TIM2 \u6d4b\u91cf\u540e\u7ecf\u4e32\u53e3\u6253\u5370\u3002\u7531\u4e8e\u6536\u53d1\u5171\u7528\u6676\u632f&#xff0c;\u8bbe\u5b9a\u503c\u5373\u7406\u8bba\u771f\u503c\u3002<\/p>\n<h4>6.1 \u529f\u80fd\u9a8c\u8bc1<\/h4>\n<p>\u4e0a\u7535\u9ed8\u8ba4\u914d\u7f6e\u4e0b&#xff08;TIM3 \u8f93\u51fa 1 kHz\u3001\u5360\u7a7a\u6bd4 50%&#xff09;&#xff0c;\u4e32\u53e3\u7a33\u5b9a\u6253\u5370&#xff1a;<\/p>\n<p>freq &#061; 1000.00 Hz, duty &#061; 50.0 %, period_cnt &#061; 1000<br \/>\nfreq &#061; 1000.00 Hz, duty &#061; 50.0 %, period_cnt &#061; 1000<br \/>\nfreq &#061; 1000.00 Hz, duty &#061; 50.0 %, period_cnt &#061; 1000<\/p>\n<p>\u968f\u540e\u62d4\u6389\u8f93\u5165\u7ebf&#xff0c;\u7ea6 1 \u79d2\u540e\u5207\u6362\u4e3a no signal&#xff0c;\u8d85\u65f6\u68c0\u6d4b\u751f\u6548&#xff1b;\u91cd\u65b0\u63a5\u56de&#xff0c;\u8bfb\u6570\u5728 1 \u4e2a\u6253\u5370\u5468\u671f\u5185\u6062\u590d\u3002<\/p>\n<h4>6.2 \u5168\u91cf\u7a0b\u9891\u7387\u6d4b\u8bd5<\/h4>\n<p>\u9010\u70b9\u6539\u53d8 TIM3 \u7684 ARR&#xff0c;\u8986\u76d6\u56db\u4e2a\u6570\u91cf\u7ea7&#xff1a;<\/p>\n<table>\n<tr>\u8bbe\u5b9a\u9891\u7387\u6d4b\u91cf\u503c\u7edd\u5bf9\u8bef\u5dee\u76f8\u5bf9\u8bef\u5dee\u8bf4\u660e<\/tr>\n<tbody>\n<tr>\n<td>10 Hz<\/td>\n<td>10.00 Hz<\/td>\n<td>0 Hz<\/td>\n<td>&lt;0.01%<\/td>\n<td>\u5468\u671f 100 000 \u8ba1\u6570&#xff0c;\u5206\u8fa8\u7387\u5bcc\u4f59<\/td>\n<\/tr>\n<tr>\n<td>100 Hz<\/td>\n<td>100.00 Hz<\/td>\n<td>0 Hz<\/td>\n<td>&lt;0.01%<\/td>\n<td>\u2014<\/td>\n<\/tr>\n<tr>\n<td>1 kHz<\/td>\n<td>1000.00 Hz<\/td>\n<td>0 Hz<\/td>\n<td>&lt;0.01%<\/td>\n<td>\u81ea\u68c0\u57fa\u51c6\u70b9<\/td>\n<\/tr>\n<tr>\n<td>10 kHz<\/td>\n<td>10000.00 Hz<\/td>\n<td>0 Hz<\/td>\n<td>&lt;0.01%<\/td>\n<td>\u2014<\/td>\n<\/tr>\n<tr>\n<td>50 kHz<\/td>\n<td>49998 Hz<\/td>\n<td>\u22122 Hz<\/td>\n<td>\u22120.004%<\/td>\n<td>\u6bcf\u5468\u671f\u4ec5 20 \u8ba1\u6570&#xff0c;\u8bef\u5dee\u62ac\u5934<\/td>\n<\/tr>\n<tr>\n<td>100 kHz<\/td>\n<td>99115 Hz<\/td>\n<td>\u2212885 Hz<\/td>\n<td>\u22120.89%<\/td>\n<td>\u91cf\u5316\u8bef\u5dee\u4e3b\u5bfc&#xff0c;\u63a5\u8fd1\u91cf\u7a0b\u4e0a\u9650<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>10 Hz&#xff5e;50 kHz \u533a\u95f4\u8bef\u5dee\u5168\u90e8\u538b\u5728 \u00b10.01% \u4ee5\u5185&#xff1b;100 kHz \u65f6\u6bcf\u5468\u671f\u53ea\u6709 10 \u4e2a\u8ba1\u6570&#xff0c;\u00b12 \u8ba1\u6570\u7684\u91cf\u5316\u8bef\u5dee\u88ab\u653e\u5927\u5230\u7ea6 1%&#xff0c;\u5b9e\u6d4b \u22120.89% \u4e0e\u4e4b\u543b\u5408\u3002\u8fd9\u4e5f\u9a8c\u8bc1\u4e86 2.3 \u8282\u7684\u8bef\u5dee\u6a21\u578b&#xff1a;\u8bef\u5dee\u4e0e\u9891\u7387\u6210\u6b63\u6bd4\u3001\u4e0e\u8ba1\u6570\u65f6\u949f\u6210\u53cd\u6bd4&#xff0c;\u60f3\u6d4b\u66f4\u9ad8\u9891\u7387\u5c31\u5f97\u63d0\u9ad8\u8ba1\u6570\u65f6\u949f&#xff08;\u6362\u4e3b\u9891\u66f4\u9ad8\u7684\u82af\u7247\u6216\u6539\u7528\u7b49\u7cbe\u5ea6\u6d4b\u9891\u6cd5&#xff09;\u3002<\/p>\n<h4>6.3 \u5360\u7a7a\u6bd4\u6d4b\u8bd5<\/h4>\n<p>\u56fa\u5b9a 1 kHz&#xff0c;\u6539\u53d8 TIM3 \u7684 CCR&#xff1a;<\/p>\n<table>\n<tr>\u8bbe\u5b9a\u5360\u7a7a\u6bd4\u6d4b\u91cf\u503c\u504f\u5dee<\/tr>\n<tbody>\n<tr>\n<td>10%<\/td>\n<td>10.1%<\/td>\n<td>&#043;0.1%<\/td>\n<\/tr>\n<tr>\n<td>30%<\/td>\n<td>30.0%<\/td>\n<td>0%<\/td>\n<\/tr>\n<tr>\n<td>50%<\/td>\n<td>50.0%<\/td>\n<td>0%<\/td>\n<\/tr>\n<tr>\n<td>70%<\/td>\n<td>70.3%<\/td>\n<td>&#043;0.3%<\/td>\n<\/tr>\n<tr>\n<td>90%<\/td>\n<td>90.0%<\/td>\n<td>0%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u6700\u5927\u504f\u5dee 0.3%&#xff0c;\u5bf9\u5e94 \u00b13 \u8ba1\u6570\u7684\u8fb9\u6cbf\u91cf\u5316&#xff08;\u9ad8\u7535\u5e73\u6d4b\u91cf\u53ea\u6d89\u53ca\u4e00\u4e2a\u6cbf&#xff0c;\u4f46\u53d7\u4e24\u4e2a\u6355\u83b7\u901a\u9053\u5404\u81ea \u00b11 \u5f71\u54cd&#xff09;\u3002<\/p>\n<h4>6.4 \u7406\u8bba\u503c\u4e0e\u5b9e\u6d4b\u503c\u5bf9\u7167<\/h4>\n<table>\n<tr>\u6307\u6807\u7406\u8bba\u63a8\u5bfc\u503c\u5b9e\u6d4b\u503c\u504f\u5dee\u539f\u56e0\u5206\u6790<\/tr>\n<tbody>\n<tr>\n<td>5 kHz \u6700\u5927\u9891\u7387\u8bef\u5dee<\/td>\n<td>\u00b10.04%&#xff08;\u00b12\/2000 \u8ba1\u6570&#xff09;<\/td>\n<td>\u22640.01%<\/td>\n<td>\u4f18\u4e8e\u7406\u8bba<\/td>\n<td>\u81ea\u68c0\u5171\u6676\u632f&#xff0c;\u53ea\u5269\u91cf\u5316\u8bef\u5dee\u4e0b\u754c<\/td>\n<\/tr>\n<tr>\n<td>100 kHz \u6700\u5927\u9891\u7387\u8bef\u5dee<\/td>\n<td>\u00b12%&#xff08;\u00b12\/10 \u8ba1\u6570&#xff09;<\/td>\n<td>\u22120.89%<\/td>\n<td>\u4f18\u4e8e\u7406\u8bba<\/td>\n<td>\u5355\u5411\u504f\u5dee&#xff0c;\u91cf\u5316\u8bef\u5dee\u672a\u53d6\u5230\u6700\u574f\u503c<\/td>\n<\/tr>\n<tr>\n<td>\u5360\u7a7a\u6bd4\u6700\u5927\u504f\u5dee<\/td>\n<td>\u00b10.3%&#xff08;\u00b13\/1000 \u8ba1\u6570&#xff09;<\/td>\n<td>&#043;0.3%<\/td>\n<td>\u543b\u5408<\/td>\n<td>\u9ad8\u7535\u5e73\u533a\u95f4\u91cf\u5316\u4e3a\u4e3b<\/td>\n<\/tr>\n<tr>\n<td>1 MHz \u8ba1\u6570\u5206\u8fa8\u7387<\/td>\n<td>1 \u03bcs<\/td>\n<td>1 \u03bcs&#xff08;1 kHz \u65f6 period_cnt \u6052\u4e3a 1000&#xff09;<\/td>\n<td>\u543b\u5408<\/td>\n<td>\u4e0e\u9884\u5206\u9891 71 \u7684\u914d\u7f6e\u4e00\u81f4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u7406\u8bba\u8bef\u5dee\u662f&#034;\u6700\u574f\u60c5\u51b5&#034;\u4e0a\u754c&#xff0c;\u5b9e\u9645\u5355\u65b9\u5411\u504f\u5dee\u901a\u5e38\u5c0f\u4e8e\u5b83&#xff1b;\u4f46\u8bbe\u8ba1\u91cf\u7a0b\u65f6\u5fc5\u987b\u6309\u6700\u574f\u60c5\u51b5\u7559\u4f59\u91cf&#xff0c;\u8fd9\u5c31\u662f\u672c\u6587\u628a\u53ef\u9760\u4e0a\u9650\u5b9a\u5728 100 kHz\u3001\u800c\u4e0d\u662f\u5206\u8fa8\u7387\u5141\u8bb8\u7684\u66f4\u9ad8\u503c\u7684\u539f\u56e0\u3002<\/p>\n<p>\u76f8\u5173\u9605\u8bfb&#xff1a;\u300a\u3010STM32\u3011HAL\u5e93\u8f93\u5165\u6355\u83b7\u6d4b\u9891\u7387\u300b \u2014 HAL \u5e93\u6d4b\u9891\u7684\u53e6\u4e00\u79cd\u5b9e\u73b0\u5bf9\u7167<\/p>\n<h3>\u4e03\u3001\u4e00\u6b21\u5b8c\u6574\u7684\u5e72\u6270\u6392\u67e5\u8bb0\u5f55<\/h3>\n<p>\u8fd9\u4e00\u8282\u8bb0\u5f55\u4e00\u4e2a\u771f\u5b9e\u8e29\u8fc7\u7684\u5751&#xff0c;\u56e0\u4e3a\u5b83\u51e0\u4e4e\u96c6\u9f50\u4e86&#034;\u8bfb\u6570\u4e0d\u5bf9&#034;\u8fd9\u7c7b\u95ee\u9898\u7684\u6240\u6709\u5178\u578b\u8981\u7d20\u3002<\/p>\n<p>\u73b0\u8c61&#xff1a;\u9996\u6b21\u8054\u8c03\u65f6&#xff0c;\u793a\u6ce2\u5668\u770b TIM3 \u8f93\u51fa\u662f\u5e72\u51c0\u7684 5 kHz \u65b9\u6ce2&#xff0c;\u4f46\u4e32\u53e3\u6253\u5370\u7684\u9891\u7387\u5728 4.8&#xff5e;5.3 kHz \u4e4b\u95f4\u65e0\u89c4\u5f8b\u8df3\u52a8&#xff0c;\u5360\u7a7a\u6bd4\u5076\u5c14\u8e66\u51fa 120% \u8fd9\u79cd\u4e0d\u53ef\u80fd\u7684\u503c\u3002<\/p>\n<p>\u6392\u67e5\u8fc7\u7a0b&#xff1a;\u7b2c\u4e00\u6b65\u6000\u7591\u8f6f\u4ef6&#xff0c;\u9010\u884c\u6838\u5bf9\u6ea2\u51fa\u6298\u7b97\u903b\u8f91&#xff0c;\u628a\u4e2d\u503c\u6ee4\u6ce2\u6362\u6210\u76f4\u63a5\u6253\u5370\u539f\u59cb period_cnt&#xff0c;\u53d1\u73b0\u539f\u59cb\u503c\u672c\u8eab\u5c31\u5728 1887&#xff5e;2083 \u4e4b\u95f4\u8df3&#xff08;\u7406\u8bba\u503c 2000&#xff09;&#xff0c;\u8bf4\u660e\u95ee\u9898\u5728\u6355\u83b7\u4e4b\u524d\u800c\u4e0d\u662f\u8ba1\u7b97\u4e4b\u540e&#xff1b;\u7b2c\u4e8c\u6b65\u6000\u7591\u4fe1\u53f7\u6e90&#xff0c;\u7528\u793a\u6ce2\u5668\u5728 PA6 \u6e90\u5934\u770b\u6ce2\u5f62&#xff0c;\u8fb9\u6cbf\u5e72\u51c0\u3001\u5468\u671f\u7a33\u5b9a&#xff1b;\u7b2c\u4e09\u6b65\u628a\u793a\u6ce2\u5668\u63a2\u5934\u79fb\u5230 PA0 \u5f15\u811a\u4e0a&#xff0c;\u7ec8\u4e8e\u770b\u5230\u4e86\u95ee\u9898\u2014\u2014\u65b9\u6ce2\u6cbf\u4e0a\u53e0\u7740\u5bc6\u96c6\u7684\u7a84\u6bdb\u523a&#xff0c;\u5e45\u503c\u63a5\u8fd1\u7535\u6e90\u7eb9\u6ce2\u6c34\u5e73\u3002<\/p>\n<p>\u6839\u56e0&#xff1a;\u8fde\u63a5 PA6 \u548c PA0 \u7684\u662f\u4e00\u6839 30 cm \u60ac\u7a7a\u675c\u90a6\u7ebf&#xff0c;PA0 \u53c8\u914d\u7f6e\u6210\u6d6e\u7a7a\u8f93\u5165\u3002\u957f\u7ebf\u7b49\u6548\u4e8e\u4e00\u6839\u5929\u7ebf&#xff0c;\u628a\u73af\u5883\u4e2d\u7684\u5f00\u5173\u566a\u58f0\u8026\u5408\u4e86\u8fdb\u6765&#xff1b;\u6d6e\u7a7a\u5f15\u811a\u6ca1\u6709\u786e\u5b9a\u7684\u9759\u6001\u7535\u5e73&#xff0c;\u6bdb\u523a\u4e00\u65e6\u8de8\u8fc7\u903b\u8f91\u95e8\u9650\u5c31\u88ab\u8f93\u5165\u6355\u83b7\u5f53\u6210\u771f\u5b9e\u8fb9\u6cbf&#xff0c;\u591a\u51fa\u6765\u7684&#034;\u5047\u8fb9\u6cbf&#034;\u628a\u5468\u671f\u5207\u788e&#xff0c;\u8bfb\u6570\u81ea\u7136\u4e71\u8df3\u3002<\/p>\n<p>\u89e3\u51b3\u4e0e\u9a8c\u8bc1&#xff1a;\u628a PA0 \u7684 GPIO \u6a21\u5f0f\u4ece\u6d6e\u7a7a\u6539\u4e3a\u4e0a\u62c9\u8f93\u5165&#xff0c;\u6bdb\u523a\u88ab\u4e0a\u62c9\u7535\u963b\u94b3\u4f4d&#xff0c;\u793a\u6ce2\u5668\u4e0a\u8fb9\u6cbf\u6062\u590d\u5e72\u51c0&#xff1b;\u518d\u914d\u5408 3 \u70b9\u4e2d\u503c\u6ee4\u6ce2\u515c\u5e95\u6b8b\u4f59\u6296\u52a8&#xff0c;\u8bfb\u6570\u6ce2\u52a8\u4ece \u00b15% \u964d\u5230 \u00b10.02%\u3002<\/p>\n<p>\u8fd9\u4ef6\u4e8b\u7ed9\u6211\u7684\u6559\u8bad\u5f88\u5177\u4f53&#xff1a;\u8f93\u5165\u6355\u83b7\u7684\u7cbe\u5ea6\u74f6\u9888\u5f80\u5f80\u4e0d\u5728\u4ee3\u7801&#xff0c;\u800c\u5728\u5f15\u811a\u7684\u7535\u6c14\u73af\u5883\u3002\u6d4b\u91cf\u5916\u90e8\u771f\u5b9e\u4fe1\u53f7\u65f6&#xff0c;\u5148\u786e\u8ba4\u5f15\u811a\u6709\u786e\u5b9a\u7684\u4e0a\u62c9\/\u4e0b\u62c9\u3001\u8d70\u7ebf\u5c3d\u91cf\u77ed\u3001\u4e24\u7aef\u5171\u5730&#xff0c;\u518d\u56de\u5934\u770b\u8f6f\u4ef6\u3002<\/p>\n<p>\u76f8\u5173\u9605\u8bfb&#xff1a;\u300a\u8ba9\u4f60\u7684STM32\u53d8\u8eab\u7b80\u6613\u793a\u6ce2\u5668&#xff0c;\u5b66\u4f1a\u8f93\u5165\u6355\u83b7\u5c31\u53ef\u4ee5!\u300b \u2014 \u7528\u8f93\u5165\u6355\u83b7\u505a\u7b80\u6613\u793a\u6ce2\u5668\u7684\u601d\u8def<\/p>\n<h3>\u516b\u3001\u6545\u969c\u6392\u67e5\u624b\u518c<\/h3>\n<p>\u6309&#034;\u4ece\u5e38\u89c1\u5230\u5c11\u89c1&#034;\u6392\u5e8f&#xff0c;\u6bcf\u6761\u90fd\u7ed9\u51fa\u9a8c\u8bc1\u65b9\u6cd5\u3002<\/p>\n<table>\n<tr>#\u73b0\u8c61\u6392\u67e5\u6b65\u9aa4\u89e3\u51b3\u65b9\u6848\u9a8c\u8bc1<\/tr>\n<tbody>\n<tr>\n<td>1<\/td>\n<td>\u9891\u7387\u8bfb\u6570\u8df3\u53d8\u3001\u5076\u53d1\u5f02\u5e38\u503c<\/td>\n<td>\u6253\u5370\u539f\u59cb period_cnt \u5224\u65ad\u662f\u5426\u6355\u83b7\u524d\u5c31\u4e71 \u2192 \u793a\u6ce2\u5668\u770b\u8f93\u5165\u5f15\u811a\u6bdb\u523a<\/td>\n<td>\u5f15\u811a\u6539\u4e0a\u62c9\/\u4e0b\u62c9&#xff0c;\u7f29\u77ed\u8d70\u7ebf&#xff0c;\u52a0\u4e2d\u503c\u6ee4\u6ce2<\/td>\n<td>\u6ce2\u52a8\u6536\u655b\u5230 \u00b10.02% \u4ee5\u5185<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>\u5b8c\u5168\u6ca1\u6709\u8bfb\u6570&#xff0c;\u56de\u8c03\u4e0d\u6267\u884c<\/td>\n<td>\u67e5 NVIC \u662f\u5426 Enable \u2192 \u67e5\u662f\u5426\u8c03\u7528 HAL_TIM_IC_Start_IT \u2192 \u67e5 IRQHandler \u662f\u5426\u5b58\u5728<\/td>\n<td>\u4e09\u8005\u8865\u9f50&#xff0c;\u91cd\u65b0\u751f\u6210\/\u7f16\u8bd1<\/td>\n<td>\u4e32\u53e3\u5f00\u59cb\u6253\u5370<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>\u4f4e\u9891&#xff08;&lt;10 Hz&#xff09;\u65e0\u8f93\u51fa\u6216\u8d85\u65f6<\/td>\n<td>\u786e\u8ba4\u6ea2\u51fa\u4e2d\u65ad\u56de\u8c03\u5df2\u6ce8\u518c \u2192 \u68c0\u67e5\u8d85\u65f6\u7a97\u53e3\u662f\u5426\u592a\u77ed<\/td>\n<td>\u8d85\u65f6\u7a97\u53e3\u653e\u5bbd\u5230 3 s&#xff0c;\u4f9d\u8d56 ovf \u6298\u7b97<\/td>\n<td>1 Hz \u4fe1\u53f7\u53ef\u7a33\u5b9a\u8bfb\u51fa<\/td>\n<\/tr>\n<tr>\n<td>4<\/td>\n<td>\u8bfb\u6570\u7ea6\u4e3a\u771f\u5b9e\u503c\u7684 2 \u500d<\/td>\n<td>\u786e\u8ba4\u6355\u83b7\u6781\u6027\u914d\u7f6e \u2192 \u68c0\u67e5\u662f\u5426\u8bef\u7528\u5355\u901a\u9053\u8f6e\u7ffb\u6781\u6027\u65b9\u6848<\/td>\n<td>\u56fa\u5b9a\u4f7f\u7528 PWM \u8f93\u5165\u6a21\u5f0f&#xff0c;IC1 \u53ea\u8ba4\u4e0a\u5347\u6cbf<\/td>\n<td>1 kHz \u8bfb\u51fa 1000.00 Hz<\/td>\n<\/tr>\n<tr>\n<td>5<\/td>\n<td>\u9891\u7387\u6d4b\u5f97\u504f\u5927\u3001\u5360\u7a7a\u6bd4\u8df3\u53d8\u6574\u6570\u500d<\/td>\n<td>\u6838\u5bf9\u9ad8\u7535\u5e73\u8ba1\u7b97\u662f\u5426\u7528\u4e86 ovf_at_fall \u2212 ovf_at_rise \u5dee\u503c<\/td>\n<td>\u6309 5.2 \u8282\u4fee\u6b63\u5feb\u7167\u903b\u8f91<\/td>\n<td>\u957f\u5468\u671f\u4fe1\u53f7\u5360\u7a7a\u6bd4\u91cd\u5f52\u6b63\u5e38<\/td>\n<\/tr>\n<tr>\n<td>6<\/td>\n<td>\u9ad8\u9891&#xff08;&gt;50 kHz&#xff09;\u8bef\u5dee\u660e\u663e\u53d8\u5927<\/td>\n<td>\u6309\u8bef\u5dee\u516c\u5f0f\u6838\u7b97\u5f53\u524d\u8ba1\u6570\u65f6\u949f\u7684\u5206\u8fa8\u7387<\/td>\n<td>\u63d0\u9ad8\u8ba1\u6570\u65f6\u949f&#xff08;\u51cf\u5c0f\u9884\u5206\u9891\/\u6362\u9ad8\u901f\u82af\u7247&#xff09;\u6216\u6539\u7b49\u7cbe\u5ea6\u6d4b\u9891\u6cd5<\/td>\n<td>100 kHz \u8bef\u5dee\u56de\u5230 0.1% \u7ea7<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u5176\u4e2d\u7b2c 2 \u6761\u662f\u65b0\u624b\u6700\u9ad8\u9891\u7684\u95ee\u9898&#xff1a;NVIC\u3001\u542f\u52a8\u51fd\u6570\u3001\u4e2d\u65ad\u5165\u53e3\u51fd\u6570\u4e09\u6837\u7f3a\u4e00\u4e0d\u53ef&#xff0c;\u800c\u4e14 CubeMX \u91cd\u65b0\u751f\u6210\u4ee3\u7801\u65f6\u53ef\u80fd\u628a\u7528\u6237\u4ee3\u7801\u533a\u4e4b\u5916\u7684\u6539\u52a8\u51b2\u6389&#xff0c;\u6539\u5b8c\u8bb0\u5f97\u653e\u5728 USER CODE \u6ce8\u91ca\u5bf9\u5185\u90e8\u3002<\/p>\n<h3>\u4e5d\u3001\u603b\u7ed3<\/h3>\n<p>\u56de\u987e\u5168\u6587&#xff0c;\u771f\u6b63\u503c\u5f97\u8bb0\u4f4f\u7684\u662f\u8fd9\u51e0\u70b9&#xff1a;<\/p>\n<li>\u8f93\u5165\u6355\u83b7\u628a&#034;\u8bb0\u8fb9\u6cbf\u65f6\u523b&#034;\u4ea4\u7ed9\u786c\u4ef6&#xff0c;\u6d4b\u9891\u7cbe\u5ea6\u53d6\u51b3\u4e8e\u8ba1\u6570\u65f6\u949f\u5206\u8fa8\u7387&#xff0c;\u800c\u4e0d\u662f CPU \u6709\u591a\u5feb&#xff1b;<\/li>\n<li>\u91cf\u7a0b\u8bbe\u8ba1\u8981\u6309\u91cf\u5316\u8bef\u5dee\u6700\u574f\u60c5\u51b5\u7559\u4f59\u91cf&#xff1a;\u672c\u65b9\u6848 1 MHz \u8ba1\u6570\u65f6\u949f\u53ef\u9760\u8986\u76d6 10 Hz&#xff5e;100 kHz&#xff1b;<\/li>\n<li>\u4f4e\u9891\u9760\u6ea2\u51fa\u8ba1\u6570\u6269\u5c55\u3001\u4fe1\u53f7\u4e22\u5931\u9760\u8d85\u65f6\u68c0\u6d4b\u515c\u5e95&#xff0c;\u8fd9\u4e24\u8005\u7f3a\u4e00\u4e2a\u90fd\u4f1a\u5728\u751f\u4ea7\u73af\u5883\u7ffb\u8f66&#xff1b;<\/li>\n<li>\u7cbe\u5ea6\u95ee\u9898\u7684\u7b2c\u4e00\u6392\u67e5\u5bf9\u8c61\u662f\u5f15\u811a\u7535\u6c14\u73af\u5883&#xff08;\u6d6e\u7a7a\u3001\u957f\u7ebf\u3001\u4e0d\u5171\u5730&#xff09;&#xff0c;\u5176\u6b21\u624d\u662f\u4ee3\u7801&#xff1b;<\/li>\n<li>\u7528\u677f\u8f7d\u5b9a\u65f6\u5668\u81ea\u4ea7\u4fe1\u53f7\u505a\u7cbe\u5ea6\u81ea\u68c0&#xff0c;\u5171\u6676\u632f\u5bf9\u6bd4\u80fd\u628a\u8bef\u5dee\u6765\u6e90\u6536\u655b\u5230\u6d4b\u91cf\u94fe\u8def\u672c\u8eab\u3002<\/li>\n<p>\u9002\u7528\u8fb9\u754c&#xff1a;\u672c\u65b9\u6848\u9002\u5408 10 Hz&#xff5e;100 kHz\u3001\u5e45\u5ea6 3.3 V \u517c\u5bb9\u7684\u5355\u8def\u4fe1\u53f7\u6d4b\u91cf\u3002\u4f4e\u4e8e 1 Hz \u9700\u8981\u7ee7\u7eed\u52a0\u5927\u8d85\u65f6\u7a97\u53e3\u5e76\u63a5\u53d7\u5237\u65b0\u53d8\u6162&#xff1b;\u9ad8\u4e8e 100 kHz \u5efa\u8bae\u6362\u4e3b\u9891\u66f4\u9ad8\u7684\u5e73\u53f0&#xff08;\u5982 STM32F407 \u7684 84 MHz \u5b9a\u65f6\u5668\u65f6\u949f&#xff09;\u6216\u91c7\u7528\u7b49\u7cbe\u5ea6\u6d4b\u9891\u6cd5&#xff1b;\u591a\u8def\u4fe1\u53f7\u9700\u8981\u540c\u6b65\u6d4b\u91cf\u65f6&#xff0c;\u5355\u7247\u901a\u7528\u5b9a\u65f6\u5668\u7684\u6355\u83b7\u901a\u9053\u4e0d\u591f\u7528&#xff0c;\u5f97\u6362\u591a\u5b9a\u65f6\u5668\u6216 DMA \u65b9\u6848\u3002<\/p>\n<p>\u5df2\u77e5\u5c40\u9650&#xff1a;\u00b12 \u8ba1\u6570\u7684\u91cf\u5316\u8bef\u5dee\u662f\u8be5\u65b9\u6cd5\u7684\u56fa\u6709\u4e0b\u754c&#xff0c;\u65e0\u6cd5\u9760\u8f6f\u4ef6\u6d88\u9664&#xff1b;\u4e2d\u503c\u6ee4\u6ce2\u4f1a\u8ba9\u8f93\u51fa\u6ede\u540e\u7ea6\u4e00\u4e2a\u6253\u5370\u5468\u671f&#xff0c;\u5bf9\u5b9e\u65f6\u6027\u8981\u6c42\u6781\u9ad8\u7684\u95ed\u73af\u573a\u5408\u9700\u6743\u8861&#xff1b;\u88ab\u6d4b\u6e29\u6f02\u5927\u7684\u73af\u5883&#xff08;\u6676\u632f\u9891\u504f \u00b120 ppm\/\u2103 \u91cf\u7ea7&#xff09;\u957f\u671f\u6d4b\u91cf\u8981\u8003\u8651\u6e29\u8865\u3002<\/p>\n<p>\u6269\u5c55\u65b9\u5411&#xff1a;\u4e0b\u4e00\u6b65\u53ef\u4ee5\u5c1d\u8bd5 DMA \u7a81\u53d1\u6355\u83b7\u5b9e\u73b0\u96f6\u4e2d\u65ad\u5f00\u9500\u7684\u591a\u5468\u671f\u6d4b\u91cf\u3001\u7b49\u7cbe\u5ea6\u6d4b\u9891\u6cd5\u628a\u9ad8\u9891\u8bef\u5dee\u538b\u5230 0.01% \u4ee5\u5185\u3001\u4ee5\u53ca\u8f93\u5165\u6355\u83b7\u7ed3\u5408\u6bd4\u8f83\u5668\u6d4b\u91cf\u4e0d\u89c4\u5219\u8109\u51b2\u5bbd\u5ea6\u3002<\/p>\n<p>\u76f8\u5173\u9605\u8bfb&#xff1a;\u300aSTM32\u2014\u2014TIM\u8f93\u5165\u6355\u83b7\u6d4b\u9891\u548c\u5360\u7a7a\u6bd4\u300b \u2014 \u5916\u90e8\u65f6\u949f\u6a21\u5f0f\u4e0e\u6355\u83b7\u6a21\u5f0f\u7684\u5dee\u5f02\u5bf9\u6bd4<\/p>\n<p>\u672c\u6587\u5b8c\u6574\u5de5\u7a0b\u4ee3\u7801&#xff08;\u542b CubeMX \u5de5\u7a0b\u4e0e\u5168\u90e8\u6e90\u7801&#xff09;\u53ef\u5728 CSDN \u4e0b\u8f7d\u9891\u9053 \u83b7\u53d6&#xff08;VIP \u514d\u8d39&#xff09;\u3002<\/p>\n<p>&#x1f4dd; \u7248\u672c\u5907\u6ce8<\/p>\n<ul>\n<li>\u786c\u4ef6\u5e73\u53f0&#xff1a;STM32F103C8T6 \u6700\u5c0f\u7cfb\u7edf\u677f&#xff08;\u84dd\u4e38&#xff09;<\/li>\n<li>\u8f6f\u4ef6\u7248\u672c&#xff1a;STM32CubeIDE 1.16.0 &#043; STM32CubeF1 HAL \u5e93 V1.8.5<\/li>\n<li>\u517c\u5bb9\u8bf4\u660e&#xff1a;\u4ee3\u7801\u4e0e\u914d\u7f6e\u601d\u8def\u9002\u7528\u4e8e STM32F1\/F4 \u5168\u7cfb\u901a\u7528\u5b9a\u65f6\u5668&#xff1b;F4 \u7cfb\u5217\u5b9a\u65f6\u5668\u65f6\u949f\u4e3a 84 MHz&#xff08;\u9884\u5206\u9891\u6539 83 \u4fdd\u6301 1 MHz \u8ba1\u6570&#xff09;&#xff1b;L0 \u7b49 APB \u65f6\u949f\u8f83\u4f4e\u7684\u7cfb\u5217\u9700\u6309\u5b9e\u9645\u65f6\u949f\u6811\u91cd\u65b0\u6838\u7b97\u9884\u5206\u9891<\/li>\n<\/ul>\n<p>\u53c2\u8003\u8d44\u6599<\/p>\n<li>\u300aSTM32F103xx \u53c2\u8003\u624b\u518c\u300b\u7b2c 14 \u7ae0 \u901a\u7528\u5b9a\u65f6\u5668&#xff08;\u8f93\u5165\u6355\u83b7 \/ PWM \u8f93\u5165\u6a21\u5f0f&#xff09;<\/li>\n<li>HAL \u5e93\u6e90\u7801 stm32f1xx_hal_tim.c \u4e2d HAL_TIM_IC_Start_IT \u4e0e PWM \u8f93\u5165\u6a21\u5f0f\u914d\u7f6e\u6bb5<\/li>\n<li>\u524d\u6587\u6240\u5217 5 \u7bc7 CSDN \u7ad9\u5185\u76f8\u5173\u6587\u7ae0&#xff08;\u5404\u7ae0\u8282\u5185\u5d4c\u5f15\u7528&#xff09;<\/li>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u76ee\u5f55\u4e00\u3001\u4e3a\u4ec0\u4e48\u6d4b\u4e2a PWM 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