{"id":71,"date":"2024-09-11T21:21:47","date_gmt":"2024-09-11T13:21:47","guid":{"rendered":"https:\/\/www.armfun.cn\/?p=71"},"modified":"2024-10-13T03:22:50","modified_gmt":"2024-10-12T19:22:50","slug":"%e4%ba%8c%e8%bf%9b%e5%88%b6%e4%b8%8e%e5%8d%95%e7%89%87%e6%9c%ba-io-%e7%ab%af%e5%8f%a3","status":"publish","type":"post","link":"https:\/\/www.armfun.cn\/?p=71","title":{"rendered":"\u4e8c\u8fdb\u5236\u4e0e\u5355\u7247\u673a IO \u7aef\u53e3"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u5728\u5d4c\u5165\u5f0f\u7cfb\u7edf\u548c\u5355\u7247\u673a\u5f00\u53d1\u4e2d\uff0c<strong>\u4e8c\u8fdb\u5236\u8fd0\u7b97<\/strong>\u4e0e<strong>IO\u7aef\u53e3\u63a7\u5236<\/strong>\u5bc6\u5207\u76f8\u5173\u3002\u4e8c\u8fdb\u5236\u662f\u8ba1\u7b97\u673a\u4f7f\u7528\u7684\u57fa\u7840\u8fdb\u5236\u7cfb\u7edf\uff0c1bit\u53ea\u6709 0 \u548c 1 \u4e24\u4e2a\u72b6\u6001\uff0c\u6b63\u597d\u4e0e\u5355\u7247\u673a IO \u7aef\u53e3\u7684\u9ad8\u4f4e\u7535\u5e73\u76f8\u5bf9\u5e94\u3002\u901a\u8fc7\u4f4d\u64cd\u4f5c\uff0c\u53ef\u4ee5\u9ad8\u6548\u63a7\u5236\u5355\u7247\u673a\u7684\u8f93\u5165\u8f93\u51fa\u7aef\u53e3\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">1. <strong>\u4e8c\u8fdb\u5236\u539f\u7406<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e8c\u8fdb\u5236\u7531 0 \u548c 1 \u7ec4\u6210\uff0c\u6bcf\u4e2a\u4e8c\u8fdb\u5236\u4f4d\uff08bit\uff09\u4ee3\u8868\u4e00\u4e2a\u5f00\u5173\u72b6\u6001\u3002\u5b83\u662f\u8ba1\u7b97\u673a\u786c\u4ef6\u548c\u5e95\u5c42\u5904\u7406\u7684\u57fa\u7840\u3002\u4e3a\u4e86\u7b80\u5316\u590d\u6742\u7684\u8ba1\u7b97\uff0c\u8ba1\u7b97\u673a\u4f7f\u7528\u4e86\u4e8c\u8fdb\u5236\u6570\u3001\u53cd\u7801\u548c\u8865\u7801\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u53cd\u7801<\/strong>\uff1a\u539f\u7801\u6309\u4f4d\u53d6\u53cd\u3002<\/li>\n\n\n\n<li><strong>\u8865\u7801<\/strong>\uff1a\u8ba1\u7b97\u673a\u5185\u8d1f\u6570\u662f\u6b63\u6570\u7684\u53cd\u7801\u52a0 1\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">2. <strong>\u4e8c\u8fdb\u5236\u8fd0\u7b97\u4e0e\u4f4d\u64cd\u4f5c<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u5355\u7247\u673a\u4e2d\uff0c\u5e38\u7528\u7684\u4f4d\u64cd\u4f5c\u6709\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6309\u4f4d\u4e0e\uff08&amp;\uff09<\/strong>\uff1a\u7528\u4e8e\u8bfb\u53d6\u6307\u5b9a\u7684\u4f4d\u3002<\/li>\n\n\n\n<li><strong>\u6309\u4f4d\u6216\uff08|\uff09<\/strong>\uff1a\u7528\u4e8e\u8bbe\u7f6e\u7279\u5b9a\u7684\u4f4d\u3002<\/li>\n\n\n\n<li><strong>\u6309\u4f4d\u53d6\u53cd\uff08~\uff09<\/strong>\uff1a\u7528\u4e8e\u53cd\u8f6c\u67d0\u4e9b\u4f4d\u3002<\/li>\n\n\n\n<li><strong>\u6309\u4f4d\u5f02\u6216\uff08^\uff09<\/strong>\uff1a\u7528\u4e8e\u5207\u6362\u67d0\u4e9b\u4f4d\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">3. <strong>\u5355\u7247\u673a IO \u7aef\u53e3<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5355\u7247\u673a\u7684 IO \u7aef\u53e3\u901a\u8fc7\u5bc4\u5b58\u5668\u6765\u63a7\u5236\uff0c\u6bcf\u4e2a\u5bc4\u5b58\u5668\u7684\u6bcf\u4e2a\u4f4d\u5bf9\u5e94\u4e00\u4e2a\u5f15\u811a\u7684\u72b6\u6001\uff0c\u53ef\u4ee5\u662f\u9ad8\u7535\u5e73\uff081\uff09\u6216\u4f4e\u7535\u5e73\uff080\uff09\u3002\u4e3a\u4e86\u63a7\u5236\u7279\u5b9a\u7684 IO \u7aef\u53e3\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7<strong>\u4f4d\u64cd\u4f5c<\/strong>\u8fdb\u884c\u8bfb\u5199\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">4. <strong>C \u8bed\u8a00\u4ee3\u7801\u4e3e\u4f8b<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7 C \u8bed\u8a00\u7684\u4f4d\u64cd\u4f5c\u53ef\u4ee5\u8f7b\u677e\u5b9e\u73b0\u5bf9 IO \u7aef\u53e3\u7684\u63a7\u5236\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u7528\u5982\u4e0b\u4ee3\u7801\u63a7\u5236\u67d0\u4e2a\u7aef\u53e3\u7684\u7b2c3\u4f4d\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>#define GPIO_PIN_3 (1 &lt;&lt; 3)<br>volatile int *GPIO_REG = (int *)0x40020000;  \/\/ GPIO\u5bc4\u5b58\u5668\u5730\u5740<br><br>\/\/ \u8bbe\u7f6e\u7aef\u53e3\u7b2c3\u4f4d\u4e3a\u9ad8\u7535\u5e73<br>*GPIO_REG |= GPIO_PIN_3;<br><br>\/\/ \u6e05\u9664\u7aef\u53e3\u7b2c3\u4f4d<br>*GPIO_REG &amp;= ~GPIO_PIN_3;<br><\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u8be5\u4f8b\u5b50\u4e2d\uff0c\u901a\u8fc7\u6309\u4f4d\u64cd\u4f5c\uff0c\u6211\u4eec\u80fd\u591f\u76f4\u63a5\u8bbe\u7f6e\u6216\u6e05\u9664\u67d0\u4e2a GPIO \u5f15\u811a\u7684\u72b6\u6001\uff0c\u800c\u65e0\u9700\u5bf9\u5176\u4ed6\u5f15\u811a\u4ea7\u751f\u5f71\u54cd\u3002\u8fd9\u79cd\u65b9\u6cd5\u7684\u6548\u7387\u6781\u9ad8\uff0c\u5c24\u5176\u9002\u7528\u4e8e\u5d4c\u5165\u5f0f\u7cfb\u7edf\u5f00\u53d1\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">6. <strong>\u603b\u7ed3<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e8c\u8fdb\u5236\u8fd0\u7b97\u5728\u5355\u7247\u673a\u63a7\u5236\u4e2d\u5177\u6709\u6838\u5fc3\u4f5c\u7528\uff0c\u5c24\u5176\u662f\u5728\u5904\u7406 IO \u7aef\u53e3\u65f6\uff0c\u4f4d\u64cd\u4f5c\u4e3a\u76f4\u63a5\u63a7\u5236\u786c\u4ef6\u63d0\u4f9b\u4e86\u9ad8\u6548\u7684\u624b\u6bb5\u3002\u901a\u8fc7\u638c\u63e1\u4e8c\u8fdb\u5236\u7684\u52a0\u51cf\u6cd5\u3001\u8865\u7801\u3001\u53cd\u7801\u4ee5\u53ca C \u8bed\u8a00\u4e2d\u7684\u4f4d\u64cd\u4f5c\uff0c\u6211\u4eec\u53ef\u4ee5\u8f7b\u677e\u5730\u5b9e\u73b0\u5bf9\u5355\u7247\u673a\u7684\u7cbe\u51c6\u63a7\u5236\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u5d4c\u5165\u5f0f\u7cfb\u7edf\u548c\u5355\u7247\u673a\u5f00\u53d1\u4e2d\uff0c\u4e8c\u8fdb\u5236\u8fd0\u7b97\u4e0eIO\u7aef\u53e3\u63a7\u5236\u5bc6\u5207\u76f8\u5173\u3002\u4e8c\u8fdb\u5236\u662f\u8ba1&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-71","post","type-post","status-publish","format-standard","hentry","category-arm"],"views":756,"_links":{"self":[{"href":"https:\/\/www.armfun.cn\/index.php?rest_route=\/wp\/v2\/posts\/71","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.armfun.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.armfun.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.armfun.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.armfun.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=71"}],"version-history":[{"count":1,"href":"https:\/\/www.armfun.cn\/index.php?rest_route=\/wp\/v2\/posts\/71\/revisions"}],"predecessor-version":[{"id":72,"href":"https:\/\/www.armfun.cn\/index.php?rest_route=\/wp\/v2\/posts\/71\/revisions\/72"}],"wp:attachment":[{"href":"https:\/\/www.armfun.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=71"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.armfun.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=71"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.armfun.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=71"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}