{"id":38,"date":"2018-03-10T13:46:34","date_gmt":"2018-03-10T05:46:34","guid":{"rendered":"http:\/\/www.max-shu.com\/blog\/?p=38"},"modified":"2018-03-10T14:35:38","modified_gmt":"2018-03-10T06:35:38","slug":"crc%e6%a0%a1%e9%aa%8c%e7%9a%84%e6%b1%87%e7%bc%96%e4%bb%a3%e7%a0%81","status":"publish","type":"post","link":"http:\/\/www.max-shu.com\/blog\/?p=38","title":{"rendered":"CRC\u6821\u9a8c\u7684\u6c47\u7f16\u4ee3\u7801"},"content":{"rendered":"

\u8fc1\u79fb\u81eahttp:\/\/adaishu.blog.163.com\/blog\/static\/175831286201132693018423\/<\/a><\/p>\n

\/\/C51\u8c03\u7528\u65b9\u6cd5\u5982\u4e0b\uff1a
\nunsigned int crc(unsigned char idata *,unsigned char);<\/p>\n

unsigned char idata buf[130];
\nunsigned int dat;<\/p>\n

\/\/\u6253\u5305
\nvoid pack_crc(void) {
\nbuf[128]=buf[129]=0;
\ndat=crc(buf,128);\u00a0\u00a0 \u00a0\/\/\u6253\u5305\uff0c128\u4e3a\u6570\u636e\u957f\u5ea6
\nbuf[128]=dat\/256;buf[129]=dat;
\n}
\n\/\/\u6821\u9a8c
\nbit check_crc(void) {
\nif (crc(buf,128)) return(1);\u00a0\u00a0 \u00a0\/\/\u6821\u9a8c\u9519
\nelse return(0);\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u6821\u9a8c\u6b63\u786e
\n}<\/p>\n

;2-128\u4f4dCRC\u6253\u5305\u6821\u9a8c\u7a0b\u5e8f
\nCRCP\u00a0\u00a0 \u00a0SEGMENT\u00a0\u00a0 \u00a0CODE
\nPUBLIC\u00a0\u00a0 \u00a0_crc
\nRSEG\u00a0\u00a0 \u00a0CRCP
\n_crc:
\nMOV\u00a0\u00a0 \u00a00,\u00a0\u00a0 \u00a0R7
\nMOV\u00a0\u00a0 \u00a0A,@R0
\nMOV\u00a0\u00a0 \u00a0R2,A
\nINC\u00a0\u00a0 \u00a0R0
\nMOV\u00a0\u00a0 \u00a0A,@R0
\nMOV\u00a0\u00a0 \u00a0R3,A
\nCRC1:
\nINC\u00a0\u00a0 \u00a0R0
\nMOV\u00a0\u00a0 \u00a0A,@R0
\nMOV\u00a0\u00a0 \u00a0R4,A
\nMOV\u00a0\u00a0 \u00a0R6,#8
\nCRC2:
\nMOV\u00a0\u00a0 \u00a0A,R4
\nRLC\u00a0\u00a0 \u00a0A
\nMOV\u00a0\u00a0 \u00a0R4,A
\nMOV\u00a0\u00a0 \u00a0A,R3
\nRLC\u00a0\u00a0 \u00a0A
\nMOV\u00a0\u00a0 \u00a0R3,A
\nMOV\u00a0\u00a0 \u00a0A,R2
\nRLC\u00a0\u00a0 \u00a0A
\nMOV\u00a0\u00a0 \u00a0R2,A
\nJNC\u00a0\u00a0 \u00a0CRC3
\nXRL\u00a0\u00a0 \u00a0A,#10H
\nMOV\u00a0\u00a0 \u00a0R2,A
\nMOV\u00a0\u00a0 \u00a0A,R3
\nXRL\u00a0\u00a0 \u00a0A,#21H
\nMOV\u00a0\u00a0 \u00a0R3,A
\nCRC3:
\nDJNZ\u00a0\u00a0 \u00a0R6,CRC2
\nDJNZ\u00a0\u00a0 \u00a0R5,CRC1
\nMOV\u00a0\u00a0 \u00a0R7,3
\nMOV\u00a0\u00a0 \u00a0R6,2
\nRET
\nEND<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

\u8fc1\u79fb\u81eahttp:\/\/adaishu.blog.163.com\/blog\/static\/175831286201 …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[55,7,57],"class_list":["post-38","post","type-post","status-publish","format-standard","hentry","category-6","tag-crc","tag-7","tag-57"],"views":2157,"_links":{"self":[{"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/38","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=38"}],"version-history":[{"count":1,"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/38\/revisions"}],"predecessor-version":[{"id":39,"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/38\/revisions\/39"}],"wp:attachment":[{"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=38"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=38"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=38"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}