{"id":174863,"date":"2024-11-08T00:23:29","date_gmt":"2024-11-07T16:23:29","guid":{"rendered":"https:\/\/server.hk\/cnblog\/174863\/"},"modified":"2024-11-08T00:23:30","modified_gmt":"2024-11-07T16:23:30","slug":"%e5%a6%82%e4%bd%95%e5%88%a4%e6%96%b7%e4%b8%b2%e5%8f%a3%e6%8e%a5%e6%94%b6%e5%88%b04%e5%80%8b%e5%ad%97%e7%af%80%e7%9a%84%e6%95%b8%e6%93%9a%ef%bc%9f-%e5%88%a4%e6%96%b7%e4%b8%b2%e5%8f%a3%e6%94%b6","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/174863\/","title":{"rendered":"\u5982\u4f55\u5224\u65b7\u4e32\u53e3\u63a5\u6536\u52304\u500b\u5b57\u7bc0\u7684\u6578\u64da\uff1f (\u5224\u65b7\u4e32\u53e3\u6536\u52304\u500b\u5b57\u7bc0\u7684\u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e5%88%a4%e6%96%b7%e4%b8%b2%e5%8f%a3%e6%8e%a5%e6%94%b6%e5%88%b04%e5%80%8b%e5%ad%97%e7%af%80%e7%9a%84%e6%95%b8%e6%93%9a%ef%bc%9f-TTzqaaLpau\">\u5982\u4f55\u5224\u65b7\u4e32\u53e3\u63a5\u6536\u52304\u500b\u5b57\u7bc0\u7684\u6578\u64da\uff1f<\/h1>\n<p>\u5728\u5d4c\u5165\u5f0f\u7cfb\u7d71\u548c\u8a08\u7b97\u6a5f\u901a\u4fe1\u4e2d\uff0c\u4e32\u53e3\u901a\u4fe1\u662f\u4e00\u7a2e\u5e38\u898b\u7684\u6578\u64da\u50b3\u8f38\u65b9\u5f0f\u3002\u7576\u6211\u5011\u4f7f\u7528\u4e32\u53e3\u63a5\u6536\u6578\u64da\u6642\uff0c\u7d93\u5e38\u9700\u8981\u5224\u65b7\u63a5\u6536\u5230\u7684\u6578\u64da\u662f\u5426\u7b26\u5408\u9810\u671f\u7684\u683c\u5f0f\u548c\u9577\u5ea6\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5224\u65b7\u4e32\u53e3\u63a5\u6536\u52304\u500b\u5b57\u7bc0\u7684\u6578\u64da\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e4%b8%b2%e5%8f%a3%e9%80%9a%e4%bf%a1%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-TTzqaaLpau\">\u4e32\u53e3\u901a\u4fe1\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u4e32\u53e3\u901a\u4fe1\u662f\u4e00\u7a2e\u9ede\u5c0d\u9ede\u7684\u6578\u64da\u50b3\u8f38\u65b9\u5f0f\uff0c\u901a\u5e38\u4f7f\u7528RS-232\u3001RS-485\u7b49\u6a19\u6e96\u3002\u6578\u64da\u4ee5\u4e32\u884c\u7684\u65b9\u5f0f\u9010\u4f4d\u50b3\u8f38\uff0c\u9019\u610f\u5473\u8457\u6578\u64da\u5728\u50b3\u8f38\u904e\u7a0b\u4e2d\u662f\u6309\u4f4d\u767c\u9001\u7684\uff0c\u800c\u4e0d\u662f\u6574\u500b\u5b57\u7bc0\u540c\u6642\u767c\u9001\u3002\u9019\u7a2e\u65b9\u5f0f\u7684\u512a\u9ede\u5728\u65bc\u5176\u7c21\u55ae\u6027\u548c\u6210\u672c\u6548\u76ca\uff0c\u7279\u5225\u9069\u5408\u65bc\u77ed\u8ddd\u96e2\u901a\u4fe1\u3002<\/p>\n<h2 id=\"%e6%8e%a5%e6%94%b6%e6%95%b8%e6%93%9a%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%b5%81%e7%a8%8b-TTzqaaLpau\">\u63a5\u6536\u6578\u64da\u7684\u57fa\u672c\u6d41\u7a0b<\/h2>\n<p>\u5728\u4e32\u53e3\u901a\u4fe1\u4e2d\uff0c\u63a5\u6536\u6578\u64da\u7684\u57fa\u672c\u6d41\u7a0b\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u521d\u59cb\u5316\u4e32\u53e3\u8a2d\u7f6e\uff0c\u5305\u62ec\u6ce2\u7279\u7387\u3001\u6578\u64da\u4f4d\u3001\u505c\u6b62\u4f4d\u548c\u6821\u9a57\u4f4d\u3002<\/li>\n<li>\u76e3\u807d\u4e32\u53e3\uff0c\u7b49\u5f85\u6578\u64da\u5230\u9054\u3002<\/li>\n<li>\u7576\u6578\u64da\u5230\u9054\u6642\uff0c\u8b80\u53d6\u6578\u64da\u4e26\u5b58\u5132\u5230\u7de9\u885d\u5340\u3002<\/li>\n<li>\u6839\u64da\u9700\u8981\u5224\u65b7\u6578\u64da\u7684\u9577\u5ea6\u548c\u683c\u5f0f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%88%a4%e6%96%b7%e6%8e%a5%e6%94%b6%e5%88%b0%e7%9a%84%e6%95%b8%e6%93%9a%e9%95%b7%e5%ba%a6-TTzqaaLpau\">\u5224\u65b7\u63a5\u6536\u5230\u7684\u6578\u64da\u9577\u5ea6<\/h2>\n<p>\u5728\u63a5\u6536\u5230\u6578\u64da\u5f8c\uff0c\u9996\u5148\u9700\u8981\u78ba\u8a8d\u6578\u64da\u7684\u9577\u5ea6\u662f\u5426\u70ba4\u500b\u5b57\u7bc0\u3002\u9019\u53ef\u4ee5\u901a\u904e\u6aa2\u67e5\u7de9\u885d\u5340\u4e2d\u7684\u6578\u64da\u9577\u5ea6\u4f86\u5be6\u73fe\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\u4ee3\u78bc\uff0c\u5c55\u793a\u5982\u4f55\u5728C\u8a9e\u8a00\u4e2d\u5224\u65b7\u63a5\u6536\u5230\u7684\u6578\u64da\u9577\u5ea6\uff1a<\/p>\n<pre><code>\n#include &lt;stdio.h&gt;\n#include &lt;string.h&gt;\n\n#define BUFFER_SIZE 256\n\nvoid checkDataLength(char *buffer, int length) {\n    if (length == 4) {\n        printf(\"\u63a5\u6536\u52304\u500b\u5b57\u7bc0\u7684\u6578\u64da\uff1a%sn\", buffer);\n    } else {\n        printf(\"\u63a5\u6536\u5230\u7684\u6578\u64da\u9577\u5ea6\u4e0d\u6b63\u78ba\uff1a%dn\", length);\n    }\n}\n\nint main() {\n    char buffer[BUFFER_SIZE];\n    int receivedLength = 4; \/\/ \u5047\u8a2d\u63a5\u6536\u5230\u7684\u6578\u64da\u9577\u5ea6\u70ba4\n\n    \/\/ \u6a21\u64ec\u63a5\u6536\u5230\u7684\u6578\u64da\n    strncpy(buffer, \"test\", receivedLength);\n    checkDataLength(buffer, receivedLength);\n\n    return 0;\n}\n<\/code><\/pre>\n<h2 id=\"%e6%95%b8%e6%93%9a%e6%a0%bc%e5%bc%8f%e7%9a%84%e9%a9%97%e8%ad%89-TTzqaaLpau\">\u6578\u64da\u683c\u5f0f\u7684\u9a57\u8b49<\/h2>\n<p>\u9664\u4e86\u6aa2\u67e5\u6578\u64da\u7684\u9577\u5ea6\u5916\uff0c\u9084\u9700\u8981\u9a57\u8b49\u6578\u64da\u7684\u683c\u5f0f\u3002\u9019\u901a\u5e38\u6d89\u53ca\u5230\u6aa2\u67e5\u6578\u64da\u7684\u5167\u5bb9\u662f\u5426\u7b26\u5408\u9810\u671f\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u671f\u671b\u63a5\u6536\u5230\u7684\u6578\u64da\u662f\u6574\u6578\u6216\u7279\u5b9a\u7684\u5b57\u7b26\u5e8f\u5217\uff0c\u6211\u5011\u9700\u8981\u9032\u4e00\u6b65\u89e3\u6790\u548c\u9a57\u8b49\u9019\u4e9b\u6578\u64da\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u6aa2\u67e5\u63a5\u6536\u5230\u76844\u500b\u5b57\u7bc0\u662f\u5426\u70ba\u6709\u6548\u7684\u6574\u6578\uff1a<\/p>\n<pre><code>\n#include &lt;stdio.h&gt;\n#include &lt;stdlib.h&gt;\n\nvoid validateData(char *buffer) {\n    int value = *((int *)buffer);\n    printf(\"\u63a5\u6536\u5230\u7684\u6574\u6578\u503c\uff1a%dn\", value);\n}\n\nint main() {\n    char buffer[4];\n    int receivedLength = 4;\n\n    \/\/ \u5047\u8a2d\u63a5\u6536\u5230\u7684\u6578\u64da\u70ba\u6574\u6578\n    int number = 1234;\n    memcpy(buffer, &amp;number, sizeof(number));\n\n    if (receivedLength == 4) {\n        validateData(buffer);\n    } else {\n        printf(\"\u63a5\u6536\u5230\u7684\u6578\u64da\u9577\u5ea6\u4e0d\u6b63\u78ba\u3002n\");\n    }\n\n    return 0;\n}\n<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-TTzqaaLpau\">\u7d50\u8ad6<\/h2>\n<p>\u5728\u4e32\u53e3\u901a\u4fe1\u4e2d\uff0c\u5224\u65b7\u63a5\u6536\u5230\u7684\u6578\u64da\u662f\u5426\u70ba4\u500b\u5b57\u7bc0\u662f\u78ba\u4fdd\u6578\u64da\u6b63\u78ba\u6027\u7684\u91cd\u8981\u6b65\u9a5f\u3002\u901a\u904e\u6aa2\u67e5\u6578\u64da\u9577\u5ea6\u548c\u683c\u5f0f\uff0c\u6211\u5011\u53ef\u4ee5\u6709\u6548\u5730\u8655\u7406\u548c\u89e3\u6790\u63a5\u6536\u5230\u7684\u6578\u64da\u3002\u9019\u4e9b\u57fa\u672c\u7684\u6aa2\u67e5\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u907f\u514d\u6f5b\u5728\u7684\u932f\u8aa4\u548c\u554f\u984c\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u4f3a\u670d\u5668\u548c\u96f2\u670d\u52d9\u6709\u9032\u4e00\u6b65\u7684\u9700\u6c42\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4e86\u89e3\u66f4\u591a\u8cc7\u8a0a\uff0c\u63a2\u7d22\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u70ba\u60a8\u7684\u9805\u76ee\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5224\u65b7\u4e32\u53e3\u63a5\u6536\u5230\u76844\u500b\u5b57\u7bc0\u6578\u64da\uff0c\u638c\u63e1\u6578\u64da\u89e3\u6790\u8207\u8655\u7406\u6280\u5de7\uff0c\u63d0\u5347\u4e32\u53e3\u901a\u4fe1\u6548\u7387\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-174863","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/174863","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=174863"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/174863\/revisions"}],"predecessor-version":[{"id":174864,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/174863\/revisions\/174864"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=174863"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=174863"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=174863"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}