{"id":103027,"date":"2026-09-09T19:17:18","date_gmt":"2026-09-09T11:17:18","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/103027.html"},"modified":"2026-09-09T19:17:18","modified_gmt":"2026-09-09T11:17:18","slug":"freertos%e6%ad%bb%e9%94%81%e6%98%af%e6%80%8e%e4%b9%88%e4%ba%a7%e7%94%9f%e7%9a%84%ef%bc%9f%e4%b8%80%e6%96%87%e5%bd%bb%e5%ba%95%e7%90%86%e8%a7%a3%e4%bb%bb%e5%8a%a1%e6%ad%bb%e9%94%81%e6%9c%ba%e5%88%b6","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/103027.html","title":{"rendered":"FreeRTOS\u6b7b\u9501\u662f\u600e\u4e48\u4ea7\u751f\u7684\uff1f\u4e00\u6587\u5f7b\u5e95\u7406\u89e3\u4efb\u52a1\u6b7b\u9501\u673a\u5236"},"content":{"rendered":"<h2>FreeRTOS\u6b7b\u9501\u662f\u600e\u4e48\u4ea7\u751f\u7684&#xff1f;\u4e00\u6587\u5f7b\u5e95\u7406\u89e3\u4efb\u52a1\u6b7b\u9501\u673a\u5236<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260909111716-6aa1403cb25cd.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u5728\u5d4c\u5165\u5f0f\u5b9e\u65f6\u7cfb\u7edf\u5f00\u53d1\u4e2d&#xff0c;FreeRTOS\u591a\u4efb\u52a1\u5e76\u53d1\u8fd0\u884c\u63d0\u9ad8\u4e86\u7cfb\u7edf\u6548\u7387&#xff0c;\u4f46\u540c\u65f6\u4e5f\u5f15\u5165\u4e86\u4efb\u52a1\u4e4b\u95f4\u8d44\u6e90\u7ade\u4e89\u7684\u95ee\u9898\u3002\u5176\u4e2d\u6700\u4e25\u91cd\u7684\u95ee\u9898\u4e4b\u4e00\u5c31\u662f\u2014\u2014\u6b7b\u9501&#xff08;Deadlock&#xff09;\u3002<\/p>\n<p>\u5f53\u7cfb\u7edf\u51fa\u73b0\u6b7b\u9501\u65f6&#xff0c;\u4efb\u52a1\u4e0d\u4f1a\u5d29\u6e83&#xff0c;\u4e5f\u4e0d\u4f1a\u62a5\u9519&#xff0c;\u800c\u662f\u8868\u73b0\u4e3a\u201c\u7a0b\u5e8f\u7a81\u7136\u5361\u4f4f&#xff0c;\u67d0\u4e9b\u529f\u80fd\u6c38\u8fdc\u4e0d\u518d\u6267\u884c\u201d\u3002<\/p>\n<p>\u672c\u6587\u901a\u8fc7\u51e0\u4e2a\u5178\u578b\u573a\u666f&#xff0c;\u7ed3\u5408 FreeRTOS \u4e2d Mutex\u3001\u4fe1\u53f7\u91cf\u3001\u961f\u5217\u3001\u4efb\u52a1\u901a\u77e5\u7b49\u673a\u5236&#xff0c;\u5206\u6790\u6b7b\u9501\u4ea7\u751f\u7684\u539f\u56e0\u4ee5\u53ca\u5982\u4f55\u907f\u514d\u3002<\/p>\n<hr \/>\n<h2>\u4e00\u3001\u4ec0\u4e48\u662fFreeRTOS\u6b7b\u9501&#xff1f;<\/h2>\n<p>\u7b80\u5355\u6765\u8bf4&#xff1a;<\/p>\n<p>\u6b7b\u9501\u5c31\u662f\u591a\u4e2a\u4efb\u52a1\u4e92\u76f8\u7b49\u5f85\u5bf9\u65b9\u91ca\u653e\u8d44\u6e90&#xff0c;\u5bfc\u81f4\u6240\u6709\u4efb\u52a1\u90fd\u65e0\u6cd5\u7ee7\u7eed\u8fd0\u884c\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<ul>\n<li>\u4efb\u52a1A\u62ff\u7740\u8d44\u6e901&#xff0c;\u7b49\u5f85\u8d44\u6e902<\/li>\n<li>\u4efb\u52a1B\u62ff\u7740\u8d44\u6e902&#xff0c;\u7b49\u5f85\u8d44\u6e901<\/li>\n<\/ul>\n<p>\u6b64\u65f6&#xff1a;<\/p>\n<p>\u4efb\u52a1A \u2192 \u7b49\u5f85\u4efb\u52a1B\u91ca\u653e\u8d44\u6e902<\/p>\n<p>\u4efb\u52a1B \u2192 \u7b49\u5f85\u4efb\u52a1A\u91ca\u653e\u8d44\u6e901<\/p>\n<p>\u5f62\u6210\u4e00\u4e2a\u95ed\u73af\u3002<\/p>\n<p>\u6700\u7ec8\u7ed3\u679c&#xff1a;<\/p>\n<p>\u4efb\u52a1A\u65e0\u6cd5\u7ee7\u7eed<br \/>\n\u4efb\u52a1B\u65e0\u6cd5\u7ee7\u7eed<\/p>\n<p>\u7cfb\u7edf\u5361\u6b7b<\/p>\n<p>FreeRTOS\u5b98\u65b9\u4e5f\u6307\u51fa&#xff0c;\u6b7b\u9501\u901a\u5e38\u53d1\u751f\u5728\u591a\u4e2a\u4efb\u52a1\u4f7f\u7528 Mutex \u7b49\u4e92\u65a5\u8d44\u6e90\u65f6&#xff0c;\u5982\u679c\u4efb\u52a1\u4e4b\u95f4\u83b7\u53d6\u8d44\u6e90\u7684\u987a\u5e8f\u4e0d\u4e00\u81f4&#xff0c;\u5c31\u53ef\u80fd\u5f62\u6210\u4e92\u76f8\u7b49\u5f85\u3002([GitHub][1])<\/p>\n<hr \/>\n<h2>\u4e8c\u3001\u6b7b\u9501\u4ea7\u751f\u7684\u56db\u4e2a\u5fc5\u8981\u6761\u4ef6<\/h2>\n<p>\u6b7b\u9501\u5e76\u4e0d\u662f\u968f\u673a\u4ea7\u751f\u7684&#xff0c;\u901a\u5e38\u9700\u8981\u540c\u65f6\u6ee1\u8db3\u4ee5\u4e0b4\u4e2a\u6761\u4ef6\u3002<\/p>\n<h3>1. \u4e92\u65a5\u6761\u4ef6&#xff08;Mutual Exclusion&#xff09;<\/h3>\n<p>\u610f\u601d&#xff1a;<\/p>\n<p>\u4e00\u4e2a\u8d44\u6e90\u540c\u4e00\u65f6\u95f4\u53ea\u80fd\u88ab\u4e00\u4e2a\u4efb\u52a1\u5360\u7528\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p><span class=\"token function\">xSemaphoreTake<\/span><span class=\"token punctuation\">(<\/span>Mutex<span class=\"token punctuation\">,<\/span> portMAX_DELAY<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u4efb\u52a1A\u83b7\u53d6Mutex&#xff1a;<\/p>\n<p>\u4efb\u52a1A<br \/>\n |<br \/>\n \u2193<br \/>\n Mutex<\/p>\n<p>\u6b64\u65f6\u4efb\u52a1B\u65e0\u6cd5\u4f7f\u7528\u8be5\u8d44\u6e90\u3002<\/p>\n<p>FreeRTOS\u4e2d\u7684&#xff1a;<\/p>\n<ul>\n<li>Mutex<\/li>\n<li>\u4e8c\u503c\u4fe1\u53f7\u91cf<\/li>\n<\/ul>\n<p>\u90fd\u5177\u6709\u4e92\u65a5\u7279\u6027\u3002([GitHub][1])<\/p>\n<hr \/>\n<h3>2. \u8bf7\u6c42\u5e76\u4fdd\u6301\u6761\u4ef6&#xff08;Hold and Wait&#xff09;<\/h3>\n<p>\u610f\u601d&#xff1a;<\/p>\n<p>\u4e00\u4e2a\u4efb\u52a1\u5df2\u7ecf\u5360\u6709\u8d44\u6e90&#xff0c;\u540c\u65f6\u8fd8\u7ee7\u7eed\u8bf7\u6c42\u5176\u4ed6\u8d44\u6e90\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>\u4efb\u52a1A&#xff1a;<\/p>\n<p><span class=\"token function\">take<\/span><span class=\"token punctuation\">(<\/span>Mutex1<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">take<\/span><span class=\"token punctuation\">(<\/span>Mutex2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u6267\u884c\u8fc7\u7a0b&#xff1a;<\/p>\n<p>\u4efb\u52a1A<\/p>\n<p>\u5df2\u7ecf\u62e5\u6709 Mutex1<\/p>\n<p>\u2193<\/p>\n<p>\u7ee7\u7eed\u7533\u8bf7 Mutex2<\/p>\n<p>\u5982\u679cMutex2\u88ab\u5176\u4ed6\u4efb\u52a1\u5360\u7528&#xff1a;<\/p>\n<p>\u4efb\u52a1A\u7b49\u5f85Mutex2<\/p>\n<p>\u4f46\u662f\u4e0d\u4f1a\u91ca\u653eMutex1<\/p>\n<p>\u8fd9\u5c31\u662f&#xff1a;<\/p>\n<p>\u6301\u6709 &#043; \u7b49\u5f85<\/p>\n<hr \/>\n<h2>\u4e09\u3001\u6700\u7ecf\u5178\u6848\u4f8b&#xff1a;\u4e24\u4e2a\u4efb\u52a1\u4ea4\u53c9\u7533\u8bf7Mutex\u5bfc\u81f4\u6b7b\u9501<\/h2>\n<h3>\u573a\u666f&#xff1a;<\/h3>\n<p>\u7cfb\u7edf\u6709\u4e24\u4e2a\u4e92\u65a5\u8d44\u6e90&#xff1a;<\/p>\n<p>Mutex1<\/p>\n<p>Mutex2<\/p>\n<p>\u4e24\u4e2a\u4efb\u52a1&#xff1a;<\/p>\n<p>\u4efb\u52a1A&#xff1a;<\/p>\n<p><span class=\"token function\">take<\/span><span class=\"token punctuation\">(<\/span>Mutex1<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">take<\/span><span class=\"token punctuation\">(<\/span>Mutex2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u4efb\u52a1B&#xff1a;<\/p>\n<p><span class=\"token function\">take<\/span><span class=\"token punctuation\">(<\/span>Mutex2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">take<\/span><span class=\"token punctuation\">(<\/span>Mutex1<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<hr \/>\n<h3>\u8fd0\u884c\u8fc7\u7a0b<\/h3>\n<h4>\u7b2c\u4e00\u6b65<\/h4>\n<p>\u4efb\u52a1A\u8fd0\u884c&#xff1a;<\/p>\n<p>\u4efb\u52a1A\u83b7\u53d6 Mutex1<\/p>\n<p>\u72b6\u6001&#xff1a;<\/p>\n<p>Mutex1<br \/>\n \u2193<br \/>\n\u4efb\u52a1A\u5360\u7528<\/p>\n<hr \/>\n<h4>\u7b2c\u4e8c\u6b65<\/h4>\n<p>\u4efb\u52a1B\u8fd0\u884c&#xff1a;<\/p>\n<p>\u4efb\u52a1B\u83b7\u53d6 Mutex2<\/p>\n<p>\u72b6\u6001&#xff1a;<\/p>\n<p>Mutex2<br \/>\n \u2193<br \/>\n\u4efb\u52a1B\u5360\u7528<\/p>\n<hr \/>\n<h4>\u7b2c\u4e09\u6b65<\/h4>\n<p>\u4efb\u52a1A\u7ee7\u7eed&#xff1a;<\/p>\n<p>\u7533\u8bf7&#xff1a;<\/p>\n<p>Mutex2<\/p>\n<p>\u4f46\u662f&#xff1a;<\/p>\n<p>Mutex2\u5df2\u7ecf\u88ab\u4efb\u52a1B\u5360\u7528<\/p>\n<p>\u6240\u4ee5&#xff1a;<\/p>\n<p>\u4efb\u52a1A\u8fdb\u5165\u963b\u585e<\/p>\n<hr \/>\n<h4>\u7b2c\u56db\u6b65<\/h4>\n<p>\u4efb\u52a1B\u7ee7\u7eed&#xff1a;<\/p>\n<p>\u7533\u8bf7&#xff1a;<\/p>\n<p>Mutex1<\/p>\n<p>\u4f46\u662f&#xff1a;<\/p>\n<p>Mutex1\u5df2\u7ecf\u88ab\u4efb\u52a1A\u5360\u7528<\/p>\n<p>\u6240\u4ee5&#xff1a;<\/p>\n<p>\u4efb\u52a1B\u8fdb\u5165\u963b\u585e<\/p>\n<p>\u6700\u7ec8&#xff1a;<\/p>\n<p>\u4efb\u52a1A\u7b49\u5f85\u4efb\u52a1B<\/p>\n<p>\u4efb\u52a1B\u7b49\u5f85\u4efb\u52a1A<\/p>\n<p>\u5f62\u6210&#xff1a;<\/p>\n<p>\u73af\u8def\u7b49\u5f85<\/p>\n<p>\u7ed3\u679c&#xff1a;<\/p>\n<p>\u6b7b\u9501<\/p>\n<hr \/>\n<h2>\u56db\u3001\u6301\u9501\u540e\u8fdb\u5165\u963b\u585e&#xff0c;\u4e5f\u53ef\u80fd\u4ea7\u751f\u6b7b\u9501<\/h2>\n<p>\u5f88\u591a\u5f00\u53d1\u8005\u8ba4\u4e3a&#xff1a;<\/p>\n<p>\u201c\u6211\u53ea\u6709\u4e00\u4e2aMutex&#xff0c;\u4e0d\u4f1a\u6b7b\u9501\u3002\u201d<\/p>\n<p>\u5b9e\u9645\u4e0a\u5e76\u4e0d\u4e00\u5b9a\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p><span class=\"token function\">xSemaphoreTake<\/span><span class=\"token punctuation\">(<\/span>Mutex<span class=\"token punctuation\">,<\/span> portMAX_DELAY<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u7b49\u5f85\u6d88\u606f<\/span><br \/>\n<span class=\"token function\">xQueueReceive<\/span><span class=\"token punctuation\">(<\/span>queue<span class=\"token punctuation\">,<\/span><br \/>\n              <span class=\"token operator\">&amp;<\/span>data<span class=\"token punctuation\">,<\/span><br \/>\n              portMAX_DELAY<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">xSemaphoreGive<\/span><span class=\"token punctuation\">(<\/span>Mutex<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u95ee\u9898&#xff1a;<\/p>\n<p>\u4efb\u52a1\u83b7\u53d6Mutex\u4ee5\u540e&#xff1a;<\/p>\n<p>\u8fdb\u5165\u7b49\u5f85\u72b6\u6001\u3002<\/p>\n<p>\u4f46\u662f&#xff1a;<\/p>\n<p>Mutex\u6ca1\u6709\u91ca\u653e\u3002<\/p>\n<hr \/>\n<p>\u6b64\u65f6\u53e6\u4e00\u4e2a\u4efb\u52a1&#xff1a;<\/p>\n<p><span class=\"token function\">xSemaphoreTake<\/span><span class=\"token punctuation\">(<\/span>Mutex<span class=\"token punctuation\">,<\/span><br \/>\n               portMAX_DELAY<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u4f1a\u4e00\u76f4\u7b49\u5f85\u3002<\/p>\n<p>\u5982\u679c&#xff1a;<\/p>\n<p>\u8fd9\u4e2a\u4efb\u52a1\u8d1f\u8d23\u53d1\u9001\u961f\u5217\u6d88\u606f&#xff1a;<\/p>\n<p>\u4efb\u52a1A\u7b49\u5f85\u6d88\u606f<\/p>\n<p>\u2193<\/p>\n<p>\u6d88\u606f\u9700\u8981\u4efb\u52a1B\u53d1\u9001<\/p>\n<p>\u2193<\/p>\n<p>\u4efb\u52a1B\u7b49\u5f85Mutex<\/p>\n<p>\u2193<\/p>\n<p>Mutex\u88ab\u4efb\u52a1A\u5360\u7528<\/p>\n<p>\u5f62\u6210&#xff1a;<\/p>\n<p>\u4efb\u52a1A\u7b49\u5f85\u4efb\u52a1B<\/p>\n<p>\u4efb\u52a1B\u7b49\u5f85\u4efb\u52a1A<\/p>\n<p>\u6700\u7ec8\u6b7b\u9501\u3002<\/p>\n<hr \/>\n<h2>\u4e94\u3001\u4efb\u52a1\u4e4b\u95f4\u7b49\u5f85\u4fe1\u53f7\/\u6d88\u606f\u5bfc\u81f4\u6b7b\u9501<\/h2>\n<p>FreeRTOS\u4e2d\u5e38\u89c1\u901a\u4fe1\u65b9\u5f0f&#xff1a;<\/p>\n<ul>\n<li>\u4fe1\u53f7\u91cf<\/li>\n<li>\u961f\u5217<\/li>\n<li>Task Notification<\/li>\n<\/ul>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>\u4efb\u52a1A&#xff1a;<\/p>\n<p>\u7b49\u5f85\u4efb\u52a1B\u901a\u77e5<\/p>\n<p>\u4efb\u52a1B&#xff1a;<\/p>\n<p>\u7b49\u5f85\u4efb\u52a1A\u6d88\u606f<\/p>\n<p>\u72b6\u6001&#xff1a;<\/p>\n<p>\u4efb\u52a1A<br \/>\n \u2193<br \/>\n\u7b49\u5f85B<\/p>\n<p>\u4efb\u52a1B<br \/>\n \u2193<br \/>\n\u7b49\u5f85A<\/p>\n<p>\u6ca1\u6709\u4efb\u4f55\u4efb\u52a1\u4e3b\u52a8\u6267\u884c&#xff1a;<\/p>\n<p>\u53cc\u65b9\u6c38\u4e45\u963b\u585e<\/p>\n<hr \/>\n<h2>\u516d\u3001\u6b7b\u9501\u5f62\u6210\u7684\u6839\u672c\u539f\u56e0\u603b\u7ed3<\/h2>\n<table>\n<tr>\u539f\u56e0\u8bf4\u660e<\/tr>\n<tbody>\n<tr>\n<td>\u8d44\u6e90\u4e92\u65a5<\/td>\n<td>\u4e00\u4e2a\u8d44\u6e90\u53ea\u80fd\u4e00\u4e2a\u4efb\u52a1\u4f7f\u7528<\/td>\n<\/tr>\n<tr>\n<td>\u8bf7\u6c42\u5e76\u4fdd\u6301<\/td>\n<td>\u62ff\u7740\u8d44\u6e90\u7ee7\u7eed\u7b49\u5f85\u5176\u4ed6\u8d44\u6e90<\/td>\n<\/tr>\n<tr>\n<td>\u4e0d\u53ef\u5265\u593a<\/td>\n<td>\u8d44\u6e90\u53ea\u80fd\u4e3b\u52a8\u91ca\u653e<\/td>\n<\/tr>\n<tr>\n<td>\u73af\u8def\u7b49\u5f85<\/td>\n<td>\u4efb\u52a1\u4e4b\u95f4\u5f62\u6210\u7b49\u5f85\u95ed\u73af<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u56db\u4e2a\u6761\u4ef6\u540c\u65f6\u6ee1\u8db3&#xff1a;<\/p>\n<p>\u2193<\/p>\n<p>\u4ea7\u751f\u6b7b\u9501<\/p>\n<hr \/>\n<h2>\u4e03\u3001FreeRTOS\u4e2d\u5e38\u89c1\u6b7b\u9501\u4ee3\u7801\u95ee\u9898<\/h2>\n<h3>1. Mutex\u5d4c\u5957\u987a\u5e8f\u4e0d\u4e00\u81f4<\/h3>\n<p>\u9519\u8bef&#xff1a;<\/p>\n<p>\u4efb\u52a1A&#xff1a;<\/p>\n<p>Mutex1<\/p>\n<p>Mutex2<\/p>\n<p>\u4efb\u52a1B&#xff1a;<\/p>\n<p>Mutex2<\/p>\n<p>Mutex1<\/p>\n<hr \/>\n<p>\u6b63\u786e&#xff1a;<\/p>\n<p>\u6240\u6709\u4efb\u52a1\u7edf\u4e00\u987a\u5e8f&#xff1a;<\/p>\n<p>Mutex1<\/p>\n<p>\u2193<\/p>\n<p>Mutex2<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>\u6240\u6709\u4efb\u52a1\u89c4\u5b9a&#xff1a;<\/p>\n<p>\u5148\u7533\u8bf7\u5916\u8bbe\u9501<\/p>\n<p>\u518d\u7533\u8bf7\u6570\u636e\u9501<\/p>\n<hr \/>\n<h3>2. \u6301\u9501\u72b6\u6001\u8c03\u7528\u963b\u585e\u51fd\u6570<\/h3>\n<p>\u9519\u8bef&#xff1a;<\/p>\n<p>Take Mutex<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">vTaskDelay<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">QueueReceive<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>Give Mutex<span class=\"token punctuation\">;<\/span><\/p>\n<p>\u95ee\u9898&#xff1a;<\/p>\n<p>\u963b\u585e\u671f\u95f4&#xff1a;<\/p>\n<p>Mutex\u4e00\u76f4\u5360\u7528\u3002<\/p>\n<hr \/>\n<p>\u6b63\u786e&#xff1a;<\/p>\n<p>Take Mutex<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u5feb\u901f\u8bbf\u95ee\u8d44\u6e90<\/span><\/p>\n<p>Give Mutex<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">QueueReceive<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u539f\u5219&#xff1a;<\/p>\n<p>\u4e0d\u8981\u6301\u6709\u9501\u7b49\u5f85\u4e8b\u4ef6\u3002<\/p>\n<hr \/>\n<h3>3. \u65e0\u9650\u7b49\u5f85<\/h3>\n<p>\u9519\u8bef&#xff1a;<\/p>\n<p><span class=\"token function\">xSemaphoreTake<\/span><span class=\"token punctuation\">(<\/span><br \/>\nMutex<span class=\"token punctuation\">,<\/span><br \/>\nportMAX_DELAY<br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u5982\u679c\u51fa\u73b0\u5f02\u5e38&#xff1a;<\/p>\n<p>\u4efb\u52a1\u6c38\u4e45\u7b49\u5f85\u3002<\/p>\n<p>\u5efa\u8bae&#xff1a;<\/p>\n<p><span class=\"token function\">xSemaphoreTake<\/span><span class=\"token punctuation\">(<\/span><br \/>\nMutex<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token number\">100<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4\u3002<\/p>\n<hr \/>\n<h2>\u516b\u3001\u5982\u4f55\u907f\u514dFreeRTOS\u6b7b\u9501&#xff1f;<\/h2>\n<h3>\u65b9\u6cd51&#xff1a;\u7edf\u4e00\u8d44\u6e90\u7533\u8bf7\u987a\u5e8f<\/h3>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>\u89c4\u5b9a&#xff1a;<\/p>\n<p>\u6240\u6709\u4efb\u52a1<\/p>\n<p>Mutex A<\/p>\n<p>\u2193<\/p>\n<p>Mutex B<\/p>\n<p>\u2193<\/p>\n<p>Mutex C<\/p>\n<p>\u7981\u6b62&#xff1a;<\/p>\n<p>B \u2192 A<\/p>\n<hr \/>\n<h3>\u65b9\u6cd52&#xff1a;\u7f29\u77edMutex\u5360\u7528\u65f6\u95f4<\/h3>\n<p>\u4e0d\u8981&#xff1a;<\/p>\n<p>\u83b7\u53d6Mutex<\/p>\n<p>\u2193<\/p>\n<p>\u5927\u91cf\u8ba1\u7b97<\/p>\n<p>\u2193<\/p>\n<p>\u7b49\u5f85\u6d88\u606f<\/p>\n<p>\u2193<\/p>\n<p>\u91ca\u653e<\/p>\n<p>\u5e94\u8be5&#xff1a;<\/p>\n<p>\u83b7\u53d6Mutex<\/p>\n<p>\u2193<\/p>\n<p>\u5feb\u901f\u64cd\u4f5c<\/p>\n<p>\u2193<\/p>\n<p>\u91ca\u653eMutex<\/p>\n<hr \/>\n<h3>\u65b9\u6cd53&#xff1a;\u907f\u514d\u4e0d\u5fc5\u8981\u5171\u4eab\u8d44\u6e90<\/h3>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>\u4e0d\u8981&#xff1a;<\/p>\n<p>\u591a\u4e2a\u4efb\u52a1\u76f4\u63a5\u64cd\u4f5cLCD<\/p>\n<p>\u53ef\u4ee5&#xff1a;<\/p>\n<p>\u4efb\u52a1A<\/p>\n<p>\u2193<\/p>\n<p>\u6d88\u606f\u961f\u5217<\/p>\n<p>\u2193<\/p>\n<p>LCD\u4efb\u52a1<\/p>\n<p>\u7531\u4e00\u4e2a\u4efb\u52a1\u7ba1\u7406\u8d44\u6e90\u3002<\/p>\n<hr \/>\n<h3>\u65b9\u6cd54&#xff1a;\u7b49\u5f85\u589e\u52a0\u8d85\u65f6\u673a\u5236<\/h3>\n<p>\u4e0d\u8981&#xff1a;<\/p>\n<p>portMAX_DELAY<\/p>\n<p>\u63a8\u8350&#xff1a;<\/p>\n<p><span class=\"token function\">xSemaphoreTake<\/span><span class=\"token punctuation\">(<\/span><br \/>\nmutex<span class=\"token punctuation\">,<\/span><br \/>\ntimeout<br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u53d1\u751f\u5f02\u5e38\u65f6&#xff1a;<\/p>\n<p>\u4e3b\u52a8\u6062\u590d\u3002<\/p>\n<hr \/>\n<h2>\u4e5d\u3001\u603b\u7ed3<\/h2>\n<p>FreeRTOS\u6b7b\u9501\u672c\u8d28\u4e0d\u662f\u7cfb\u7edf\u9519\u8bef&#xff0c;\u800c\u662f&#xff1a;<\/p>\n<p>\u4efb\u52a1\u4e4b\u95f4\u8d44\u6e90\u7ba1\u7406\u8bbe\u8ba1\u4e0d\u5408\u7406\u5bfc\u81f4\u7684\u4e92\u76f8\u7b49\u5f85\u3002<\/p>\n<p>\u6700\u5e38\u89c1\u7684\u4e09\u79cd\u60c5\u51b5&#xff1a;<\/p>\n<h4>\u2460 Mutex\u4ea4\u53c9\u7533\u8bf7<\/h4>\n<p>\u4efb\u52a1A\u62ff1\u7b492<\/p>\n<p>\u4efb\u52a1B\u62ff2\u7b491<\/p>\n<h4>\u2461 \u6301\u9501\u7b49\u5f85\u4e8b\u4ef6<\/h4>\n<p>\u62ff\u9501<\/p>\n<p>\u2193<\/p>\n<p>\u7b49\u5f85\u6d88\u606f<\/p>\n<p>\u2193<\/p>\n<p>\u522b\u4eba\u65e0\u6cd5\u83b7\u5f97\u9501<\/p>\n<h4>\u2462 \u4efb\u52a1\u4e92\u76f8\u7b49\u5f85\u901a\u77e5<\/h4>\n<p>A\u7b49B<\/p>\n<p>B\u7b49A<\/p>\n<p>\u5728\u5b9e\u9645\u5d4c\u5165\u5f0f\u9879\u76ee\u4e2d&#xff0c;\u907f\u514d\u6b7b\u9501\u6700\u91cd\u8981\u7684\u539f\u5219&#xff1a;<\/p>\n<p>\u7edf\u4e00\u8d44\u6e90\u7533\u8bf7\u987a\u5e8f&#xff0c;\u51cf\u5c11\u6301\u9501\u65f6\u95f4&#xff0c;\u4e0d\u8981\u6301\u9501\u963b\u585e\u7b49\u5f85\u3002<\/p>\n<hr \/>\n","protected":false},"excerpt":{"rendered":"<p>FreeRTOS\u6b7b\u9501\u662f\u600e\u4e48\u4ea7\u751f\u7684&#xff1f;\u4e00\u6587\u5f7b\u5e95\u7406\u89e3\u4efb\u52a1\u6b7b\u9501\u673a\u5236\u5728\u5d4c\u5165\u5f0f\u5b9e\u65f6\u7cfb\u7edf\u5f00\u53d1\u4e2d&#xff0c;FreeRTOS\u591a\u4efb\u52a1\u5e76\u53d1\u8fd0\u884c\u63d0\u9ad8\u4e86\u7cfb\u7edf\u6548\u7387&#xff0c;\u4f46\u540c\u65f6\u4e5f\u5f15\u5165\u4e86\u4efb\u52a1\u4e4b\u95f4\u8d44\u6e90\u7ade\u4e89\u7684\u95ee\u9898\u3002\u5176\u4e2d\u6700\u4e25\u91cd\u7684\u95ee\u9898\u4e4b\u4e00\u5c31\u662f\u2014\u2014\u6b7b\u9501&#xff08;Deadlock&#xff09;\u3002<br \/>\n\u5f53\u7cfb\u7edf\u51fa\u73b0\u6b7b\u9501\u65f6&#xff0c;\u4efb\u52a1\u4e0d\u4f1a\u5d29\u6e83&#xff0c;\u4e5f\u4e0d\u4f1a\u62a5\u9519&#xff0c;\u800c\u662f\u8868\u73b0\u4e3a\u201c\u7a0b\u5e8f\u7a81\u7136\u5361\u4f4f&#xff0c;\u67d0\u4e9b\u529f\u80fd\u6c38\u8fdc\u4e0d\u518d\u6267\u884c\u201d\u3002\u672c\u6587\u901a\u8fc7\u51e0\u4e2a\u5178\u578b\u573a\u666f&#xff0c;\u7ed3<\/p>\n","protected":false},"author":2,"featured_media":103026,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[5078,2896,16,1363],"topic":[],"class_list":["post-103027","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-freertos","tag-2896","tag-16","tag-1363"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ 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content=\"FreeRTOS\u6b7b\u9501\u662f\u600e\u4e48\u4ea7\u751f\u7684&#xff1f;\u4e00\u6587\u5f7b\u5e95\u7406\u89e3\u4efb\u52a1\u6b7b\u9501\u673a\u5236\u5728\u5d4c\u5165\u5f0f\u5b9e\u65f6\u7cfb\u7edf\u5f00\u53d1\u4e2d&#xff0c;FreeRTOS\u591a\u4efb\u52a1\u5e76\u53d1\u8fd0\u884c\u63d0\u9ad8\u4e86\u7cfb\u7edf\u6548\u7387&#xff0c;\u4f46\u540c\u65f6\u4e5f\u5f15\u5165\u4e86\u4efb\u52a1\u4e4b\u95f4\u8d44\u6e90\u7ade\u4e89\u7684\u95ee\u9898\u3002\u5176\u4e2d\u6700\u4e25\u91cd\u7684\u95ee\u9898\u4e4b\u4e00\u5c31\u662f\u2014\u2014\u6b7b\u9501&#xff08;Deadlock&#xff09;\u3002 \u5f53\u7cfb\u7edf\u51fa\u73b0\u6b7b\u9501\u65f6&#xff0c;\u4efb\u52a1\u4e0d\u4f1a\u5d29\u6e83&#xff0c;\u4e5f\u4e0d\u4f1a\u62a5\u9519&#xff0c;\u800c\u662f\u8868\u73b0\u4e3a\u201c\u7a0b\u5e8f\u7a81\u7136\u5361\u4f4f&#xff0c;\u67d0\u4e9b\u529f\u80fd\u6c38\u8fdc\u4e0d\u518d\u6267\u884c\u201d\u3002\u672c\u6587\u901a\u8fc7\u51e0\u4e2a\u5178\u578b\u573a\u666f&#xff0c;\u7ed3\" \/>\n<meta property=\"og:url\" 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