{"id":647,"date":"2018-07-28T16:15:28","date_gmt":"2018-07-28T08:15:28","guid":{"rendered":"https:\/\/www.dd-home.top:1443\/?p=647"},"modified":"2018-07-28T16:15:28","modified_gmt":"2018-07-28T08:15:28","slug":"crc16-xmodem-%e6%a0%a1%e9%aa%8c%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.dd-home.top\/?p=647","title":{"rendered":"CRC16 XModem \u6821\u9a8c\u65b9\u6cd5"},"content":{"rendered":"<p><!--more--><\/p>\n<p>http:\/\/api.ip33.com\/crc\/c?data=17+00+1C+00+00+00+AC+00+00+00+00+00+00+00&#038;width=16&#038;poly=1021&#038;init=0000&#038;xor=0000&#038;refin=false&#038;refout=true<\/p>\n<p><a href=\"http:\/\/www.ip33.com\/crc.html\">http:\/\/api.ip33.com\/crc.html<\/a><\/p>\n<pre class=\"lang:java decode:true\" title=\"CRC_XModem\">public static int CRC_XModem(byte[] bytes) {\n\t\tint crc = 0x00; \/\/ initial value\n\t\tint polynomial = 0x1021;\n\t\tfor (int index = 0; index &lt; bytes.length; index++) {\n\t\t\tbyte b = bytes[index];\n\t\t\tfor (int i = 0; i &lt; 8; i++) {\n\t\t\t\tboolean bit = ((b &gt;&gt; (7 - i) &amp; 1) == 1);\n\t\t\t\tboolean c15 = ((crc &gt;&gt; 15 &amp; 1) == 1);\n\t\t\t\tcrc &lt;&lt;= 1;\n\t\t\t\tif (c15 ^ bit)\n\t\t\t\t\tcrc ^= polynomial;\n\t\t\t}\n\t\t}\n\t\tcrc &amp;= 0xffff;\n\t\treturn crc;\n\t}<\/pre>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[58],"class_list":["post-647","post","type-post","status-publish","format-standard","hentry","category-java","tag-58"],"_links":{"self":[{"href":"https:\/\/www.dd-home.top\/index.php?rest_route=\/wp\/v2\/posts\/647","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dd-home.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dd-home.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dd-home.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dd-home.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=647"}],"version-history":[{"count":0,"href":"https:\/\/www.dd-home.top\/index.php?rest_route=\/wp\/v2\/posts\/647\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.dd-home.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=647"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dd-home.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=647"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dd-home.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=647"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}