{"id":3207,"date":"2022-02-23T16:37:30","date_gmt":"2022-02-23T08:37:30","guid":{"rendered":"https:\/\/blog.iyatt.com\/?p=3207"},"modified":"2024-05-05T14:19:26","modified_gmt":"2024-05-05T06:19:26","slug":"%e6%a0%91%e8%8e%93%e6%b4%be%e4%bd%bf%e7%94%a8-i2c-lcd1602","status":"publish","type":"post","link":"https:\/\/blog.iyatt.com\/?p=3207","title":{"rendered":"\u6811\u8393\u6d3e\u4f7f\u7528 I2C LCD1602"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 ez-toc-wrap-center counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title ez-toc-toggle\" style=\"cursor:pointer\">\u76ee\u5f55<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/blog.iyatt.com\/?p=3207\/#%E7%AE%80%E4%BB%8B\" >\u7b80\u4ecb<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/blog.iyatt.com\/?p=3207\/#%E6%B5%8B%E8%AF%95%E7%8E%AF%E5%A2%83\" >\u6d4b\u8bd5\u73af\u5883<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/blog.iyatt.com\/?p=3207\/#%E9%A9%B1%E5%8A%A8\" >\u9a71\u52a8<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/blog.iyatt.com\/?p=3207\/#%E4%BD%BF%E7%94%A8%E7%A4%BA%E4%BE%8B\" >\u4f7f\u7528\u793a\u4f8b<\/a><\/li><\/ul><\/nav><\/div>\n\n<p>\u53d1\u5e03\u4e8e: <a href=\"http:\/\/blog.iyatt.com\" target=\"_blank\" rel=\"noreferrer noopener\">blog.iyatt.com<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E7%AE%80%E4%BB%8B\"><\/span>\u7b80\u4ecb<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1000\" height=\"495\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-24.png\" alt=\"\" class=\"wp-image-3212 lazyload\" data-srcset=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-24.png 1000w, https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-24-300x149.png 300w, https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-24-768x380.png 768w\" data-sizes=\"(max-width: 1000px) 100vw, 1000px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1000px; --smush-placeholder-aspect-ratio: 1000\/495;\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1000\" height=\"461\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-25.png\" alt=\"\" class=\"wp-image-3214 lazyload\" data-srcset=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-25.png 1000w, https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-25-300x138.png 300w, https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-25-768x354.png 768w\" data-sizes=\"(max-width: 1000px) 100vw, 1000px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1000px; --smush-placeholder-aspect-ratio: 1000\/461;\" \/><\/figure>\n\n\n\n<p>LCD1602\u6db2\u6676\u663e\u793a\u5668\u662f\u5e7f\u6cdb\u4f7f\u7528\u7684\u4e00\u79cd\u5b57\u7b26\u578b\u6db2\u6676\u663e\u793a\u6a21\u5757\u3002\u5b83\u662f\u7531\u5b57\u7b26\u578b\u6db2\u6676\u663e\u793a\u5c4f\uff08LCD\uff09\u3001\u63a7\u5236\u9a71\u52a8\u4e3b\u7535\u8defHD44780\u53ca\u5176\u6269\u5c55\u9a71\u52a8\u7535\u8defHD44100\uff0c\u4ee5\u53ca\u5c11\u91cf\u7535\u963b\u3001\u7535\u5bb9\u5143\u4ef6\u548c\u7ed3\u6784\u4ef6\u7b49\u88c5\u914d\u5728PCB\u677f\u4e0a\u800c\u7ec4\u6210\u3002\u4e0d\u540c\u5382\u5bb6\u751f\u4ea7\u7684LCD1602\u82af\u7247\u53ef\u80fd\u6709\u6240\u4e0d\u540c\uff0c\u4f46\u4f7f\u7528\u65b9\u6cd5\u90fd\u662f\u4e00\u6837\u7684\u3002\u4e3a\u4e86\u964d\u4f4e\u6210\u672c\uff0c\u7edd\u5927\u591a\u6570\u5236\u9020\u5546\u90fd\u76f4\u63a5\u5c06\u88f8\u7247\u505a\u5230\u677f\u5b50\u4e0a\u3002    &#8212;&#8212; \u6765\u81ea\u767e\u5ea6\u767e\u79d1<\/p>\n\n\n\n<p>\u8be5\u663e\u793a\u5c4f\u5206\u8fa8\u7387\u4e3a 16&#215;2\uff0c\u6bcf\u884c\u53ef\u663e\u793a16\u4e2a\u5b57\u7b26\uff0c\u5171\u4e24\u884c\uff0c\u6bcf\u4e2a\u5b57\u7b26\u7684\u70b9\u9635\u5927\u5c0f 5&#215;8\u3002<\/p>\n\n\n\n<p>\u6839\u636e\u4ece\u7f51\u4e0a\u67e5\u5230\u7684\u4fe1\u606f\uff0cI2C \u63a5\u53e3\u7684 LCD1602 \u5730\u5740\u6709 0x27 \u548c 0x3F \u4e24\u79cd\uff0c\u4e0d\u8fc7\u76ee\u524d\u6211\u53ea\u9047\u5230\u8fc7 0x27 \u7684\uff08\u5982\u4e0b\u56fe\uff0c\u5176\u4e2d 3c \u662f\u6211\u63a5\u7684 OLED\uff0c\u53ef\u5ffd\u7565\uff09\uff0c\u67e5\u770b i2c \u8bbe\u5907\u5730\u5740\u53ef\u4ee5\u4f7f\u7528 i2cdetect<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">sudo apt install -y i2c-tools<\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"488\" height=\"281\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-22.png\" alt=\"\" class=\"wp-image-3209 lazyload\" data-srcset=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-22.png 488w, https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-22-300x173.png 300w\" data-sizes=\"(max-width: 488px) 100vw, 488px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 488px; --smush-placeholder-aspect-ratio: 488\/281;\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%B5%8B%E8%AF%95%E7%8E%AF%E5%A2%83\"><\/span>\u6d4b\u8bd5\u73af\u5883<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u6811\u8393\u6d3e\u5b98\u65b9\u7cfb\u7edf 64\u4f4d \uff08Debian 10\uff09<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E9%A9%B1%E5%8A%A8\"><\/span>\u9a71\u52a8<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u8be5\u9a71\u52a8\u662f\u57fa\u4e8e WiringPi \u5e93\u5bf9 i2c \u8fdb\u884c\u64cd\u4f5c\u7684\uff0c\u5982\u679c\u8981\u4f7f\u7528\u8be5\u5e93\u5219\u9700\u8981\u5148\u5b89\u88c5 WiringPi\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">sudo apt update &amp;&amp; sudo apt install git build-essential make\n\ngit clone https:\/\/github.com\/WiringPi\/WiringPi.git --depth=1\n\nsudo bash WiringPi\/INSTALL<\/pre>\n\n\n\n<p>\u53e6\u5916\u56e0\u4e3a\u6d89\u53ca\u5230 I2C \u7684\u4f7f\u7528\uff0c\u6811\u8393\u6d3e\u9ed8\u8ba4\u662f\u6ca1\u6709\u5f00\u542f I2C \u7684\uff0c\u9700\u8981\u624b\u52a8\u8bbe\u7f6e\u6253\u5f00\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"780\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-23-1024x780.png\" alt=\"\" class=\"wp-image-3210 lazyload\" data-srcset=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-23-1024x780.png 1024w, https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-23-300x229.png 300w, https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-23-768x585.png 768w, https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-23.png 1106w\" data-sizes=\"(max-width: 1024px) 100vw, 1024px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1024px; --smush-placeholder-aspect-ratio: 1024\/780;\" \/><\/figure>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * @file I2C_LCD1602.h\n * @author IYATT-yx\n * @brief I2C LCD1602 \u6811\u6885\u6d3e\u9a71\u52a8\n * @version 0.1\n * @date 2022-02-23\n * \n * @copyright Copyright (C) 2022 IYATT-yx iyatt@iyatt.com\n * Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.\n * This program is free software: you can redistribute it and\/or modify\n * it under the terms of the GNU Affero General Public License as published\n * by the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n * GNU Affero General Public License for more details.\n * You should have received a copy of the GNU Affero General Public License\n * along with this program.  If not, see &lt;https:\/\/www.gnu.org\/licenses\/>.\n * \n *\/\n\n#include \"wiringPi.h\"\n#include \"wiringPiI2C.h\"\n\n#define ADDR 0x27  \/\/ \u5730\u5740\n\nint fd = 0;  \/\/ \u8bbe\u5907\u63cf\u8ff0\u7b26\nint blen = 1;  \/\/ \u80cc\u5149\u706f\n\nvoid write_word(int data)\n{\n    int tmp = data;\n    if (1 == blen)\n    {\n        tmp |= 0x08;\n    }\n    else\n    {\n        tmp &amp;= 0xf7;\n    }\n    wiringPiI2CWrite(fd, tmp);\n}\n\nvoid command(int cmd)\n{\n    int buf = cmd &amp; 0xF0;\n    buf |= 0x04;\n    write_word(buf);\n    delay(2);\n    buf &amp;= 0xFB;\n    write_word(buf);\n    buf = (cmd &amp; 0x0F) &lt;&lt; 4;\n    buf |= 0x04;\n    write_word(buf);\n    delay(2);\n    buf &amp;= 0xFB;\n    write_word(buf);\n}\n\n\/**\n * @brief \u521d\u59cb\u5316\uff0c\u4f7f\u7528\u524d\u5fc5\u987b\u8c03\u7528\n * \n *\/\nvoid i2c_lcd1602_init()\n{\n    fd = wiringPiI2CSetup(ADDR);\n    command(0x33);\n    delay(5);\n    command(0x32);\n    delay(5);\n    command(0x28);\n    delay(5);\n    command(0x0C);\n    delay(5);\n    command(0x01);\n    wiringPiI2CWrite(fd, 0x08);\n}\n\n\/**\n * @brief LCD \u663e\u793a\u5b57\u7b26\n *      \u6ce8\u610f\u4e0d\u652f\u6301\u81ea\u52a8\u6362\u884c\uff0c\u5047\u5982\u7b2c\u4e00\u884c\u5269\u4e0b\u7684\u4f4d\u7f6e\u4e0d\u591f\u663e\u793a\uff0c\u4e5f\u4e0d\u4f1a\u81ea\u52a8\u6362\u5230\u7b2c\u4e8c\u884c\u663e\u793a\n * @param x \u5f00\u59cb\u5217\uff0c\u53ef 0\uff5e15\n * @param y \u5f00\u59cb\u884c\uff0c\u53ef 0\uff5e1\n * @param s \u8981\u663e\u793a\u7684\u5b57\u7b26\u4e32\n *\/\nvoid write(int x, int y, const char *s)\n{\n    if (x &lt; 0)\n    {\n        x = 0;\n    }\n    if (x > 15)\n    {\n        x = 15;\n    }\n    if (y &lt; 0)\n    {\n        y = 0;\n    }\n    if (y > 1)\n    {\n        y = 1;\n    }\n    command(0x80 + 0x40 * y + x);\n    for (int i = 0; s[i] != '\\0'; ++i)\n    {\n            int buf = s[i] &amp; 0xF0;\n            buf |= 0x05;\n            write_word(buf);\n            delay(2);\n            buf &amp;= 0xFB;\n            write_word(buf);\n            buf = (s[i] &amp; 0x0F) &lt;&lt; 4;\n            buf |= 0x05;\n            write_word(buf);\n            delay(2);\n            buf &amp;= 0xFB;\n            write_word(buf);    \n    }\n}\n\n\/**\n * @brief \u6e05\u7a7a\u5c4f\u5e55\n * \n *\/\nvoid clear()\n{\n    command(0x01);\n}<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E4%BD%BF%E7%94%A8%E7%A4%BA%E4%BE%8B\"><\/span>\u4f7f\u7528\u793a\u4f8b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include \"I2C_LCD1602.h\"\n\nint main()\n{\n    i2c_lcd1602_init();\n    write(0, 0, \"I2C LCD1602\");\n    write(0, 1, \"Test Demo\");\n}<\/pre>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">gcc main.c -o demo -lwiringPi    -std=c17 -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Werror=format-security -Wextra -pedantic -Wimplicit-fallthrough -Wsequence-point -Wswitch-unreachable -Wswitch-enum -Wstringop-truncation -Wbool-compare -Wtautological-compare -Wfloat-equal -Wshadow=global -Wpointer-arith -Wpointer-compare -Wcast-align -Wcast-qual -Wwrite-strings -Wdangling-else -Wlogical-op -Wconversion -g -O0<\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"587\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-27-1024x587.png\" alt=\"\" class=\"wp-image-3220 lazyload\" data-srcset=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-27-1024x587.png 1024w, https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-27-300x172.png 300w, https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-27-768x440.png 768w, https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-27.png 1360w\" data-sizes=\"(max-width: 1024px) 100vw, 1024px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1024px; --smush-placeholder-aspect-ratio: 1024\/587;\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"900\" height=\"400\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-26.png\" alt=\"\" class=\"wp-image-3217 lazyload\" data-srcset=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-26.png 900w, https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-26-300x133.png 300w, https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-26-768x341.png 768w\" data-sizes=\"(max-width: 900px) 100vw, 900px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 900px; --smush-placeholder-aspect-ratio: 900\/400;\" \/><\/figure>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include \"I2C_LCD1602.h\"\n#include \"wiringPi.h\"\n\n#include &lt;stdio.h>\n#include &lt;string.h>\n#include &lt;time.h>\n\n\/**\n * @brief \u83b7\u53d6 CPU \u6e29\u5ea6\n * \n * @return int CPU \u6e29\u5ea6\u503c\n *\/\nint get_cpu_temperature()\n{\n    FILE *temperature_file = fopen(\"\/sys\/class\/thermal\/thermal_zone0\/temp\", \"r\");\n    int temperature;\n    fscanf(temperature_file, \"%i\", &amp;temperature);\n    fclose(temperature_file);\n    return temperature \/ 1000;\n}\n\n\/**\n * @brief \u83b7\u53d6\u65f6\u95f4\u5b57\u7b26\u4e32\n * \n * @param time_string \u4f20\u5165\u4e00\u4e2a\u957f\u5ea6\u4e3a 15 \u7684\u5b57\u7b26\u6570\u7ec4\uff0c\u6267\u884c\u540e\u5f97\u5230\u5f53\u524d\u65f6\u95f4\n *\/\nvoid get_time(char *time_string)\n{\n    time_t total_sec;\n    time(&amp;total_sec);\n    struct tm *time_struct = localtime(&amp;total_sec);\n    sprintf(time_string, \"%i.%i %i:%i:%i\",\n            time_struct->tm_mon,\n            time_struct->tm_mday,\n            time_struct->tm_hour,\n            time_struct->tm_min,\n            time_struct->tm_sec);\n}\n\nint main()\n{\n    i2c_lcd1602_init();\n    char temperature[16];\n    char time_string[15];\n    while (1)\n    {\n        clear();\n        memset(time_string, '\\0', sizeof(time_string));\n        get_time(time_string);\n        write(0, 0, time_string);\n        memset(temperature, '\\0', sizeof(temperature));\n        sprintf(temperature, \"temperature: %d\", get_cpu_temperature());\n        write(0, 1, temperature);\n        delay(800);\n    }\n}<\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"756\" height=\"263\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-21.png\" alt=\"\" class=\"wp-image-3223 lazyload\" data-srcset=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-21.png 756w, https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-21-300x104.png 300w\" data-sizes=\"(max-width: 756px) 100vw, 756px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 756px; --smush-placeholder-aspect-ratio: 756\/263;\" \/><\/figure>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include \"I2C_LCD1602.h\"\n#include \"wiringPi.h\"\n\n#include &lt;stdio.h>\n#include &lt;string.h>\n#include &lt;arpa\/inet.h>\n#include &lt;ifaddrs.h>\n#include &lt;netinet\/in.h>\n\n\/**\n * @brief \u83b7\u53d6 IP\n * \n * @param ip \u4f20\u5165\u4e00\u4e2a\u5927\u5c0f\u4e3a 16 \u7684\u5b57\u7b26\u6570\u7ec4\uff0c\u6267\u884c\u540e\u5f97\u5230\u672c\u673a IP \u5730\u5740\n * @return int 1 \u6709\u7ebf\u8fde\u63a5\uff1b 2 \u65e0\u7ebf\u8fde\u63a5\n *\/\nint get_ip(char *ip)\n{\n    struct ifaddrs *ifAddrStruct = NULL;\n    void *tmpAddrPtr = NULL;\n\n    getifaddrs(&amp;ifAddrStruct);\n    while (ifAddrStruct != NULL)    \n    {\n        if (ifAddrStruct->ifa_addr->sa_family == AF_INET)\n        {\n            tmpAddrPtr = &amp;((struct sockaddr_in *)ifAddrStruct->ifa_addr)->sin_addr;\n            char addressBuffer[INET_ADDRSTRLEN];\n            inet_ntop(AF_INET, tmpAddrPtr, addressBuffer, INET_ADDRSTRLEN);\n\n            if (strcmp(ifAddrStruct->ifa_name, \"eth0\") == 0)\n            {\n                strcpy(ip, addressBuffer);\n                return 1;\n            }\n            else if (strcmp(ifAddrStruct->ifa_name, \"wlan0\") == 0)\n            {\n                strcpy(ip, addressBuffer);\n                return 2;\n            }\n        }\n        ifAddrStruct = ifAddrStruct->ifa_next;\n    }\n    return -1;\n}\n\nint main()\n{\n    i2c_lcd1602_init();\n    char ip[16];\n    while (1)\n    {\n        clear();\n        memset(ip, '\\0', sizeof(ip));\n        int ret = get_ip(ip);\n        if (ret == 1)\n        {\n            write(0, 0, \"eth0:\");\n        }\n        else if (ret == 2)\n        {\n            write(0, 0, \"wlan0:\");\n        }\n        write(0, 1, ip);\n        delay(1000);\n    }\n}<\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"358\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-28-1024x358.png\" alt=\"\" class=\"wp-image-3226 lazyload\" data-srcset=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-28-1024x358.png 1024w, https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-28-300x105.png 300w, https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-28-768x269.png 768w, https:\/\/blog.iyatt.com\/wp-content\/uploads\/2022\/02\/image-28.png 1040w\" data-sizes=\"(max-width: 1024px) 100vw, 1024px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1024px; --smush-placeholder-aspect-ratio: 1024\/358;\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>\u53d1\u5e03\u4e8e: blog.iyatt.com \u7b80\u4ecb LCD1602\u6db2\u6676\u663e\u793a\u5668\u662f\u5e7f\u6cdb\u4f7f\u7528\u7684\u4e00\u79cd\u5b57\u7b26\u578b\u6db2\u6676\u663e\u793a\u6a21\u5757\u3002\u5b83\u662f [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"zakra_page_container_layout":"customizer","zakra_page_sidebar_layout":"customizer","zakra_remove_content_margin":false,"zakra_sidebar":"customizer","zakra_transparent_header":"customizer","zakra_logo":0,"zakra_main_header_style":"default","zakra_menu_item_color":"","zakra_menu_item_hover_color":"","zakra_menu_item_active_color":"","zakra_menu_active_style":"","zakra_page_header":true,"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[1,600],"tags":[],"class_list":["post-3207","post","type-post","status-publish","format-standard","hentry","category-all","category-600"],"modified_by":"IYATT-yx","_links":{"self":[{"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=\/wp\/v2\/posts\/3207","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3207"}],"version-history":[{"count":0,"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=\/wp\/v2\/posts\/3207\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3207"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3207"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3207"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}