{"id":71849,"date":"2023-05-01T16:05:45","date_gmt":"2023-05-01T08:05:45","guid":{"rendered":"http:\/\/www.idc.net\/help\/71849\/"},"modified":"2023-05-01T16:05:45","modified_gmt":"2023-05-01T08:05:45","slug":"linux%e4%b8%8b%e4%bd%bf%e7%94%a8i2c%e9%80%9a%e4%bf%a1%e8%bf%9b%e8%a1%8c%e8%af%bb%e5%86%99%e6%93%8d%e4%bd%9c%ef%bc%88linuxi2c%e8%af%bb%e5%86%99%ef%bc%89","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/71849\/","title":{"rendered":"Linux\u4e0b\u4f7f\u7528I2C\u901a\u4fe1\u8fdb\u884c\u8bfb\u5199\u64cd\u4f5c\uff08linuxi2c\u8bfb\u5199\uff09"},"content":{"rendered":"<p>\u501f\u52a9I2C\u901a\u8baf\uff0c\u8bbe\u5907\u53ef\u4ee5\u5b9e\u73b0\u8fdc\u7a0b\u63a7\u5236\uff0c\u6211\u4eec\u7ecf\u5e38\u7528\u6765\u5b9e\u73b0\u4f20\u611f\u5668\u7ec4\u7f51\uff0c\u5982\u4f9b\u6e7f\u3001\u6e29\u63a7\u7684\u5e94\u7528\u573a\u666f\u3002\u5728linux\u7cfb\u7edf\u4e2d\uff0c\u4e5f\u7ecf\u5e38\u7528\u5230I2C\u5916\u8bbe\u8fdb\u884c\u901a\u4fe1\uff0c\u6bd4\u5982LCD\u3001\u89e6\u6478\u5c4f\u3001\u5149\u7167\u5ea6\u4f20\u611f\u5668\u7b49\u7b49\u3002<\/p>\n<\/p>\n<p>\u4e0b\u9762\u7b80\u5355\u4ecb\u7ecdlinuxOS\u4e0b\u4f7f\u7528I2C\u8fdb\u884c\u8bfb\u5199\u64cd\u4f5c\uff1a<\/p>\n<\/p>\n<p>1. \u9996\u5148\uff0c\u5fc5\u987b\u8f7d\u5165I2C\u9a71\u52a8\u6a21\u5757\uff0c\u5728linux\u4e2d\u53ef\u4ee5\u6267\u884c`modprobe i2c-dev`\u547d\u4ee4\uff0c\u5728\u6a21\u5757\u6587\u4ef6\u5939\/lib\/modules\/`version`\/kernel\/drivers\/i2c\/\u4e2d\u641c\u7d22i2c-dev\uff0c\u5982\u679c\u6ca1\u6709\u7684\u8bdd\uff0c\u9700\u8981\u4f7f\u7528 `sudo apt-get install libi2c-dev`\u5b89\u88c5i2c-dev\u4f9d\u8d56\u5e93\uff0c<\/p>\n<\/p>\n<p>2. \u6267\u884c `ls \/dev\/i2c*` \u67e5\u770bI2C\u8bbe\u5907\uff0c\u5e38\u89c1\u7684I2C\u603b\u7ebf\u6709 `\/dev\/i2c-0 ` \u3001`\/dev\/i2c-1` \u3001`\/dev\/i2c-2`\u7b49\uff0c \u6ce8\u610f\u6709\u7684\u7cfb\u7edf\u53ef\u80fd\u540d\u5b57\u4e0d\u4e00\u6837\u3002<\/p>\n<\/p>\n<p>3. \u6253\u5f00I2C\u8bbe\u5907 `fd=open(\u201c\/dev\/i2c-1\u201d,O_RDWR);`<\/p>\n<\/p>\n<p>4. \u521d\u59cb\u5316I2C\u8bbe\u5907\uff0c\u4e5f\u5c31\u662f\u8bbe\u7f6e\u603b\u7ebf\u901f\u7387\uff0c\u4e5f\u53ef\u4ee5\u8bbe\u7f6e\u603b\u7ebf\u5730\u5740\uff0c `ioctl(fd,I2C_SLAVE,0x50);`<\/p>\n<\/p>\n<p>5. \u8fd9\u65f6\u5c31\u53ef\u4ee5\u4f7f\u7528 `write()` \u548c `read()` \u51fd\u6570\u8fdb\u884c\u8bfb\u5199\u64cd\u4f5c\u4e86\uff0c\u5177\u4f53\u51fd\u6570\u53ef\u4ee5\u53c2\u8003\u76f8\u5173\u4e66\u7c4d\u6216\u8005\u9a71\u52a8\u6587\u4ef6\u3002<\/p>\n<\/p>\n<p>\u8981\u60f3\u719f\u7ec3\u638c\u63e1I2C\u8bfb\u5199\u64cd\u4f5c\u6280\u5de7\uff0c\u9700\u8981\u591a\u7ec3\u4e60\uff0c\u4e00\u5b9a\u8981\u5bf9I2C\u539f\u7406\u6bd4\u8f83\u719f\u6089\uff0c\u7136\u540e\u719f\u6089linux\u4e0b\u7684i2c\u9a71\u52a8\u6a21\u5f0f\uff0c\u6700\u540e\u591a\u8c03\u8bd5\u3001\u5c1d\u8bd5\u3002<\/p>\n<\/p>\n<p>\u603b\u7684\u6765\u8bf4\uff0cI2C\u7684\u6838\u5fc3\u601d\u60f3\u662f\u5728\u5668\u4ef6\u4e0a\u6784\u5efa\u5b8c\u6574\u7684\u7f51\u7edc\uff0c\u4ece\u800c\u5b9e\u73b0\u591a\u8bbe\u5907\u7684\u8fdc\u7a0b\u63a7\u5236\uff0c\u5728linux\u4e2d\u4e5f\u662f\u975e\u5e38\u5e38\u7528\u7684\u4e00\u79cd\u8fdc\u7a0b\u63a7\u5236\u901a\u4fe1\u65b9\u5f0f\u3002<\/p>\n<p><a href=\"http:https:\/\/idc.net\/\">\u9999\u6e2f\u670d\u52a1\u5668<\/a>\u9996\u9009\u540e\u6d6a\u4e91\uff0c2H2G\u9996\u670810\u5143\u5f00\u901a\u3002<br \/>\u540e\u6d6a\u4e91\uff08www.IDC.Net\uff09\u63d0\u4f9b\u7b80\u5355\u597d\u7528\uff0c\u4ef7\u683c\u539a\u9053\u7684\u9999\u6e2f\/\u7f8e\u56fd\u4e91\u670d\u52a1\u5668\u548c\u72ec\u7acb\u670d\u52a1\u5668\u3002IDC+ISP+ICP\u8d44\u8d28\u3002ARIN\u548cAPNIC\u4f1a\u5458\u3002\u6210\u719f\u6280\u672f\u56e2\u961f15\u5e74\u884c\u4e1a\u7ecf\u9a8c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u501f\u52a9I2C\u901a\u8baf\uff0c\u8bbe\u5907\u53ef\u4ee5\u5b9e\u73b0\u8fdc\u7a0b\u63a7\u5236\uff0c\u6211\u4eec\u7ecf\u5e38\u7528\u6765\u5b9e\u73b0\u4f20\u611f\u5668\u7ec4\u7f51\uff0c\u5982\u4f9b\u6e7f\u3001\u6e29\u63a7\u7684\u5e94\u7528\u573a\u666f\u3002\u5728linux\u7cfb\u7edf\u4e2d\uff0c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[34],"tags":[],"class_list":["post-71849","post","type-post","status-publish","format-standard","hentry","category-linux"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/71849","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=71849"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/71849\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=71849"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=71849"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=71849"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}