{"id":10944,"date":"2023-08-19T00:47:15","date_gmt":"2023-08-18T16:47:15","guid":{"rendered":"https:\/\/blog.iyatt.com\/?p=10944"},"modified":"2024-05-05T12:32:01","modified_gmt":"2024-05-05T04:32:01","slug":"4x4%e7%9f%a9%e9%98%b5%e6%8c%89%e9%94%ae","status":"publish","type":"post","link":"https:\/\/blog.iyatt.com\/?p=10944","title":{"rendered":"Arduino 4&#215;4 \u77e9\u9635\u6309\u952e\u5f00\u53d1"},"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-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/blog.iyatt.com\/?p=10944\/#%E5%89%8D%E8%A8%80\" >\u524d\u8a00<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/blog.iyatt.com\/?p=10944\/#%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=10944\/#%E6%8C%89%E9%94%AE%E6%A3%80%E6%B5%8B%E9%80%BB%E8%BE%91\" >\u6309\u952e\u68c0\u6d4b\u903b\u8f91<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/blog.iyatt.com\/?p=10944\/#%E5%8D%95%E9%94%AE%E6%A3%80%E6%B5%8B\" >\u5355\u952e\u68c0\u6d4b<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/blog.iyatt.com\/?p=10944\/#%E9%80%90%E8%A1%8C%E9%80%90%E5%88%97%E6%89%AB%E6%8F%8F\" >\u9010\u884c\u9010\u5217\u626b\u63cf<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/blog.iyatt.com\/?p=10944\/#%E5%A4%96%E7%BD%AE%E7%94%B5%E8%B7%AF\" >\u5916\u7f6e\u7535\u8def<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/blog.iyatt.com\/?p=10944\/#%E5%8A%A0%E7%94%B5%E9%98%BB\" >\u52a0\u7535\u963b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/blog.iyatt.com\/?p=10944\/#%E5%8A%A0%EF%BC%88%E7%94%B5%E9%98%BB%E6%95%B0%E6%A8%A1%E8%BD%AC%E6%8D%A2%E6%A8%A1%E5%9D%97%EF%BC%89\" >\u52a0\uff08\u7535\u963b+\u6570\u6a21\u8f6c\u6362\u6a21\u5757\uff09<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h1><span class=\"ez-toc-section\" id=\"%E5%89%8D%E8%A8%80\"><\/span>\u524d\u8a00<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/08\/image-1692339362962.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 589px; --smush-placeholder-aspect-ratio: 589\/857;\" \/><br \/>\n<img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/08\/image-1692342699656.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 491px; --smush-placeholder-aspect-ratio: 491\/379;\" \/><\/p>\n<p>\u8fd9\u79cd\u77e9\u9635\u952e\u76d8\uff0c\u4ece\u5de6\u5230\u53f3\u56db\u6839\u7ebf\u4f9d\u6b21\u5bf9\u5e94\u4e00\u5230\u56db\u884c\uff0c\u6700\u540e\u56db\u6839\u7ebf\u5bf9\u5e94\u4e00\u81f3\u56db\u5217\uff0c\u6309\u952e\u7684\u65f6\u5019\u67d0\u884c\u548c\u67d0\u5217\u5bfc\u901a\u5c31\u80fd\u786e\u5b9a\u662f\u6309\u4e0b\u7684\u662f\u54ea\u4e2a\u952e\u4e86\u3002\u540e\u9762\u53d9\u8ff0 1-4 \u884c\u5c31\u662f\u5bf9\u5e94 1\u30012\u30013\u30014 \u5f15\u811a\uff0c1-4 \u5217\u5c31\u662f 5\u30016\u30017\u30018 \u5f15\u811a<\/p>\n<h2><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<p>Arduino UNO<br \/>\nArduino IDE 2.1.1<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E6%8C%89%E9%94%AE%E6%A3%80%E6%B5%8B%E9%80%BB%E8%BE%91\"><\/span>\u6309\u952e\u68c0\u6d4b\u903b\u8f91<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<pre><code class=\"language-katex\">\\begin{array}{|c|c|}\n\\hline\n\u77e9\u9635\u6309\u952e &amp; Arduino \\\\\n\\hline\n1 &amp; 6 \\\\\n\\hline\n5 &amp; GND \\\\\n\\hline\n\\end{array}<\/code><\/pre>\n<p>\u8fd9\u6837\u63a5\u7ebf\u662f\u4e3a\u4e86\u68c0\u6d4b\u7b2c\u4e00\u884c\u7b2c\u4e00\u5217\u7684\u6309\u952e\u3002Arduino \u7684\u5f15\u811a 6 \u7528\u6765\u8bfb\u53d6\u6309\u952e\u72b6\u6001\uff0c\u5148\u628a 6 \u8bbe\u7f6e\u4e0a\u62c9\u7535\u963b\u8f93\u5165\u6a21\u5f0f\uff08Arduino UNO \u5185\u7f6e\u4e86 20k\u03a9 \u4e0a\u62c9\u7535\u963b\uff09\uff0c\u6b64\u65f6\u5f15\u811a 6 \u5c31\u4f1a\u4fdd\u6301\u5728\u9ad8\u7535\u4f4d\uff0c\u5f53\u6309\u952e\u6309\u4e0b\u65f6\uff0c\u76f8\u5f53\u4e8e\u628a GND \u548c 6 \u5bfc\u901a\uff0c\u6b64\u65f6 6 \u68c0\u6d4b\u5230\u4f4e\u7535\u5e73\uff0c\u5373\u4ee3\u8868\u6309\u4e0b\u6309\u952e\u3002<\/p>\n<pre><code class=\"language-cpp\">void setup()\n{\n  Serial.begin(9600);\n\n  pinMode(6, INPUT_PULLUP);\n}\n\nvoid loop()\n{\n  Serial.println(digitalRead(6));\n  delay(100);\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/08\/image-1692345478213-e1692345552482.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 1222px; --smush-placeholder-aspect-ratio: 1222\/507;\" \/><\/p>\n<h1><span class=\"ez-toc-section\" id=\"%E5%8D%95%E9%94%AE%E6%A3%80%E6%B5%8B\"><\/span>\u5355\u952e\u68c0\u6d4b<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<h2><span class=\"ez-toc-section\" id=\"%E9%80%90%E8%A1%8C%E9%80%90%E5%88%97%E6%89%AB%E6%8F%8F\"><\/span>\u9010\u884c\u9010\u5217\u626b\u63cf<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u63a5\u7ebf\u5bf9\u7167\u8868<\/p>\n<pre><code class=\"language-katex\">\\begin{array}{|c|c|}\n\\hline\n\u77e9\u9635\u6309\u952e &amp; Arduino \\\\\n\\hline\n1 &amp; 6 \\\\\n\\hline\n2 &amp; 7 \\\\\n\\hline\n3 &amp; 8 \\\\\n\\hline\n4 &amp; 9 \\\\\n\\hline\n5 &amp; 10 \\\\\n\\hline\n6 &amp; 11 \\\\\n\\hline\n7 &amp; 12 \\\\\n\\hline\n8 &amp; 13 \\\\\n\\hline\n\\end{array}<\/code><\/pre>\n<p>\u9996\u5148\u5c06 4 \u4e2a\u884c\u5f15\u811a\u8bbe\u7f6e\u4e3a\u9ad8\u7535\u5e73\u8f93\u51fa\uff0c\u518d\u5c06\u5217\u5f15\u811a\u8bbe\u7f6e\u4e3a\u8f93\u5165\uff0c\u5e76\u4e0a\u62c9\u7535\u963b\u3002\u901a\u8fc7\u8bfb\u53d6\u5217\u5f15\u811a\u6765\u5224\u65ad\u6309\u952e\uff0c\u6ca1\u6709\u6309\u4e0b\u7684\u65f6\u5019\uff0c\u56e0\u4e3a\u4e0a\u62c9\u7535\u963b\u7684\u539f\u56e0\uff0c\u4f1a\u8bfb\u53d6\u5230\u9ad8\u7535\u5e73\uff0c\u5982\u679c\u6709\u6309\u952e\u6309\u4e0b\uff0c\u5bfc\u81f4\u67d0\u884c\u548c\u67d0\u5217\u5bfc\u901a\uff0c\u56e0\u4e3a\u884c\u5f15\u811a\u662f\u9ad8\u7535\u5e73\uff0c\u8bfb\u53d6\u5230\u7684\u4e5f\u8fd8\u662f\u9ad8\u7535\u5e73\u3002\u800c\u5982\u679c\u5728\u540c\u4e00\u65f6\u95f4\u53ea\u6709\u4e00\u884c\u8bbe\u7f6e\u4e3a\u4f4e\u7535\u5e73\uff0c\u518d\u68c0\u6d4b\u5217\u5f15\u811a\uff0c\u4e14\u6309\u4e0b\u7684\u8fd9\u4e2a\u952e\u5c31\u5728\u552f\u4e00\u8bbe\u7f6e\u4e3a\u4f4e\u7535\u5e73\u7684\u884c\uff0c\u90a3\u4e48\u5728\u6309\u4e0b\u952e\u6240\u5728\u7684\u5217\u5c31\u80fd\u68c0\u6d4b\u5230\u4f4e\u7535\u5e73\u3002<br \/>\n\u6839\u636e\u8fd9\u4e2a\u601d\u8def\uff0c\u4f9d\u6b21\u5c06\u4e00\u884c\u8bbe\u7f6e\u4e3a\u4f4e\u7535\u5e73\uff0c\u672b\u5c3e\u4f1a\u6062\u590d\u9ad8\u7535\u5e73\u3002\u5728\u5f53\u524d\u884c\u4f9d\u6b21\u8bfb\u53d6\u6bcf\u5217\u7684\u7535\u5e73\uff0c\u5982\u679c\u51fa\u73b0\u4e86\u4f4e\u7535\u5e73\uff0c\u5219\u8bf4\u660e\u8bbe\u7f6e\u4e3a\u4f4e\u7535\u5e73\u7684\u884c\u548c\u5f53\u524d\u68c0\u6d4b\u7684\u5217\u5bfc\u901a\u4e86\uff0c\u90a3\u4e48\u5c31\u786e\u5b9a\u4e86\u5f53\u524d\u6309\u4e0b\u7684\u884c\u5217\u3002<\/p>\n<pre><code class=\"language-cpp\">const int row_pins[4] = {6, 7, 8, 9}; \/\/ \u884c\u5f15\u811a\nconst int col_pins[4] = {10, 11, 12, 13}; \/\/ \u5217\u5f15\u811a\n\n\/\/ \u77e9\u9635\u6309\u952e\u5b57\u7b26\u6620\u5c04\nconst char keys [4][4] =\n{\n  {&#039;1&#039;, &#039;2&#039;, &#039;3&#039;, &#039;A&#039;},\n  {&#039;4&#039;, &#039;5&#039;, &#039;6&#039;, &#039;B&#039;},\n  {&#039;7&#039;, &#039;8&#039;, &#039;9&#039;, &#039;C&#039;},\n  {&#039;*&#039;, &#039;0&#039;, &#039;#&#039;, &#039;D&#039;}\n};\n\nchar read_key()\n{\n  char key = &#039;\\0&#039;;\n\n  for (int row = 0; row &lt; 4; ++row)\n  {\n    \/\/ \u5c06\u904d\u5386\u5230\u7684\u884c\u5f15\u811a\u8bbe\u7f6e\u4e3a\u4f4e\u7535\u5e73\n    digitalWrite(row_pins[row], LOW);\n\n    for (int col = 0; col &lt; 4; ++col)\n    {\n      \/\/ \u904d\u5386\u5217\u5f15\u811a\u68c0\u6d4b\u5230\u4f4e\u7535\u5e73\u5219\u786e\u5b9a\u884c\u5217\n      if (digitalRead(col_pins[col]) == LOW)\n      {\n        key = keys[row][col];\n        break;\n      }\n    }\n\n    \/\/ \u884c\u5f15\u811a\u6062\u590d\u9ad8\u7535\u5e73\n    digitalWrite(row_pins[row], HIGH);\n\n    if (key != &#039;\\0&#039;)\n    {\n      break;\n    }\n  }\n\n  return key;\n}\n\nvoid setup()\n{\n  Serial.begin(9600);\n\n  \/\/ \u884c\u5f15\u811a\u8bbe\u7f6e\u4e3a\u8f93\u51fa\u6a21\u5f0f\uff0c\u5e76\u7f6e\u4e3a\u9ad8\u7535\u5e73\n  for (int row = 0; row &lt; 4; ++row)\n  {\n    pinMode(row_pins[row], OUTPUT);\n    digitalWrite(row_pins[row], HIGH);\n  }\n\n  \/\/ \u5217\u5f15\u811a\u8bbe\u7f6e\u4e3a\u8f93\u5165\u6a21\u5f0f\uff08\u4e0a\u62c9\u7535\u963b\uff09\n  for (int col = 0; col &lt; 4; ++col)\n  {\n    pinMode(col_pins[col], INPUT_PULLUP);\n  }\n}\n\nvoid loop()\n{\n  char key = read_key();\n  if (key != &#039;\\0&#039;)\n  {\n    Serial.println(key);\n  }\n  delay(200); \/\/ \u907f\u514d\u6296\u52a8\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/08\/image-1692373360333.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 262px; --smush-placeholder-aspect-ratio: 262\/228;\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E5%A4%96%E7%BD%AE%E7%94%B5%E8%B7%AF\"><\/span>\u5916\u7f6e\u7535\u8def<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u9010\u884c\u9010\u5217\u626b\u63cf\u662f\u6700\u76f4\u63a5\u7684\u65b9\u6cd5\uff0c\u4f46\u7f3a\u70b9\u662f\u5360\u7528\u7684\u5f15\u811a\u592a\u591a\uff0c\u56e0\u6b64\u8003\u8651\u5916\u7f6e\u7279\u6b8a\u7535\u8def\u6765\u51cf\u5c11\u4f7f\u7528\u7684\u5f15\u811a\u3002\u8003\u8651\u5230\u4e24\u79cd\u65b9\u6848\uff1a<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E5%8A%A0%E7%94%B5%E9%98%BB\"><\/span>\u52a0\u7535\u963b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u6b64\u65b9\u6848\u5360\u7528 4 \u4e2a\u6a21\u62df\u5f15\u811a\uff0c\u518d\u52a0\u4e00\u4e2a GND\uff0c\u5b9e\u9645\u7b97\u72ec\u5360 4 \u4e2a\u5f15\u811a\u3002<br \/>\n\u6309\u952e 1-4 \u884c\u5206\u522b\u63a5\u5230 A0-A3\uff0c\u7b2c1\u5217\u63a5\u5230 GND \uff0c\u7b2c2-4\u5217\u5206\u522b\u4e32\u8054\u4e0d\u540c\u963b\u503c\u7684\u7535\u963b\u540e\uff0c\u518d\u63a5\u5230 GND\u3002<br \/>\nA0-A3 \u8d1f\u8d23\u8bfb\u53d6\uff08\u4e0a\u62c9\u7535\u963b\uff09\uff0c\u56e0\u4e3a\u4e0d\u540c\u5217\u4e32\u8054\u4e86\u4e0d\u540c\u963b\u503c\u7684\u7535\u963b\uff0c\u90a3\u4e48\u4e0d\u540c\u5217\u51fa\u73b0\u5bfc\u901a\u65f6\u6a21\u62df\u5f15\u811a\u5c31\u53ef\u4ee5\u8bfb\u53d6\u5230\u4e0d\u540c\u7684\u6570\u503c\u5927\u5c0f\uff0c\u5e76\u548c\u7535\u538b\u6709\u5173\u3002\u56e0\u4e3a Arduino UNO \u7684\u82af\u7247\u4e2d\u5185\u7f6e\u7684\u4e0a\u62c9\u7535\u963b\u662f 20k\u03a9\uff0c\u6240\u4ee5\u6211\u7684\u65b9\u6848\u662f\u5728\u7b2c 2-4 \u5217\u5206\u522b\u63a5 10k\u03a9\u300120k\u03a9 \u548c 30k\u03a9 \u7684\u7535\u963b\u3002<br \/>\n<img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/08\/image-1692634742663.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 577px; --smush-placeholder-aspect-ratio: 577\/773;\" \/><\/p>\n<p>\u63a5\u7ebf\u5982\u8868<\/p>\n<pre><code class=\"language-katex\">\\begin{array}{|c|c|c|}\n\\hline\n\u77e9\u9635\u6309\u952e &amp; \u4e32\u8054\u7535\u963b\uff08k\u03a9\uff09 &amp; Arduino \\\\\n1 &amp; &amp; A0 \\\\\n\\hline\n2 &amp; &amp; A1 \\\\\n\\hline\n3 &amp; &amp; A2 \\\\\n\\hline\n4 &amp; &amp; A3 \\\\\n\\hline\n5 &amp; &amp; GND \\\\\n\\hline\n6 &amp; 10 &amp; GND \\\\\n\\hline\n7 &amp; 20 &amp; GND \\\\\n\\hline\n8 &amp; 30 &amp; GND \\\\\n\\hline\n\\end{array}<\/code><\/pre>\n<p>\u7ecf\u8fc7\u6d4b\u8bd5\uff0c\u7b2c 1 \u5217\u5bfc\u901a\u65f6\uff0c\u8bfb\u53d6\u6570\u503c\u5927\u7ea6\u4e3a 18\uff1b\u7b2c\u4e8c\u5217\u5bfc\u901a\u65f6\uff0c\u8bfb\u53d6\u6570\u503c\u5927\u7ea6\u4e3a 250\uff1b\u7b2c\u4e09\u5217\u5bfc\u901a\u65f6\uff0c\u8bfb\u53d6\u6570\u503c\u5927\u7ea6\u4e3a 400\uff1b\u7b2c 4 \u5217\u5bfc\u901a\u65f6\uff0c\u8bfb\u53d6\u6570\u503c\u5927\u7ea6\u4e3a 500\u3002\u6839\u636e\u6d4b\u8bd5\u7ed3\u679c\u6765\u4f30\u8ba1\uff0cArduino \u5728\u4e0a\u62c9\u7535\u963b\u65f6\uff0c\u5185\u963b\u5b9e\u9645\u5927\u7ea6\u4e3a 30k\u03a9\uff08\u6a21\u62df\u4fe1\u53f7\u6570\u503c\u8303\u56f4\u4e3a 0-1023\uff0c\u5bfc\u901a 30k\u03a9 \u5217\u8bfb\u53d6\u6570\u503c\u5927\u7ea6 500\uff0c\u8bf4\u660e\u7535\u538b\u5206\u4e86\u4e00\u534a\uff0c\u4e5f\u5c31\u662f\u5185\u963b\u4e5f\u662f\u8fd9\u4e48\u591a\uff0c\u7528\u5176\u4ed6\u5217\u7684\u6570\u503c\u7b80\u5355\u8ba1\u7b97\u4e5f\u7b26\u5408\uff09\u3002<\/p>\n<p>\u901a\u8fc7\u8bfb\u53d6\u6a21\u62df\u4fe1\u53f7\u7684\u6570\u503c\u8303\u56f4\u53ef\u4ee5\u786e\u5b9a\u5217\u4e86\uff0c\u800c\u884c\u662f\u72ec\u7acb\u5bf9\u5e94\u4e00\u4e2a\u5f15\u811a\uff0c\u5728\u54ea\u4e2a\u5f15\u811a\u8bfb\u53d6\u5230\u7b26\u5408\u6761\u4ef6\u8303\u56f4\u7684\u503c\u5c31\u80fd\u786e\u5b9a\u6240\u5728\u884c\u4e86\u3002\u65e0\u6309\u952e\u6309\u4e0b\u7684\u65f6\u5019\uff0c\u5f00\u8def\uff0c\u8bfb\u5f15\u811a\u4e0a\u62c9\u7535\u963b\u5c31\u4f1a\u8bfb\u53d6\u5230 1023 \u5de6\u53f3\u7684\u503c\uff0c\u53ef\u4ee5\u660e\u786e\u533a\u5206\u662f\u5426\u6309\u4e0b\u3002\u6839\u636e\u8fd9\u4e2a\u903b\u8f91\uff0c\u5c31\u53ef\u4ee5\u5199\u4ee3\u7801\u4e86\u3002<\/p>\n<pre><code class=\"language-cpp\">\/\/ \u77e9\u9635\u6309\u952e\u5b57\u7b26\u6620\u5c04\nconst char keys [4][4] =\n{\n    {&#039;1&#039;, &#039;2&#039;, &#039;3&#039;, &#039;A&#039;},\n    {&#039;4&#039;, &#039;5&#039;, &#039;6&#039;, &#039;B&#039;},\n    {&#039;7&#039;, &#039;8&#039;, &#039;9&#039;, &#039;C&#039;},\n    {&#039;*&#039;, &#039;0&#039;, &#039;#&#039;, &#039;D&#039;}\n};\n\n\/\/ \u6839\u636e\u6a21\u62df\u4fe1\u53f7\u503c\u5224\u65ad\u6240\u5728\u5217\nint get_col(const int analog_num)\n{\n    if (analog_num &gt; 450)\n    {\n        return 3; \/\/ \u7b2c 4 \u5217\u6309\u4e0b\n    }\n    else if (analog_num &gt; 350)\n    {\n        return 2; \/\/ \u7b2c 3 \u5217\u6309\u4e0b\n    }\n    else if (analog_num &gt; 150)\n    {\n        return 1; \/\/ \u7b2c 2 \u5217\u6309\u4e0b\n    }\n    else\n    {\n        return 0; \/\/ \u7b2c 1 \u5217\u6309\u4e0b\n    }\n}\n\nchar read_key()\n{\n    int analog_num;\n    if ((analog_num = analogRead(A0)) &lt; 600) \/\/ \u4f4e\u4e8e 600 \u5224\u65ad\u67d0\u884c\u6709\u6309\u952e\u6309\u4e0b\n    {\n        return keys[0][get_col(analog_num)];\n    }\n    else if ((analog_num = analogRead(A1)) &lt; 600)\n    {\n        return keys[1][get_col(analog_num)];\n    }\n    else if ((analog_num = analogRead(A2)) &lt; 600)\n    {\n        return keys[2][get_col(analog_num)];\n    }\n    else if ((analog_num = analogRead(A3)) &lt; 600)\n    {\n        return keys[3][get_col(analog_num)];\n    }\n\n    return &#039;\\0&#039;;\n}\n\nvoid setup()\n{\n    Serial.begin(9600);\n\n    for (int row = A0; row &lt;= A3; ++row)\n    {\n        pinMode(row, INPUT_PULLUP);\n    }\n}\n\nvoid loop()\n{\n    char key = read_key();\n    if (key != &#039;\\0&#039;)\n    {\n    Serial.println(key);\n    }\n    delay(200);\n}<\/code><\/pre>\n<p>\u9a8c\u8bc1\u53ef\u884c<br \/>\n<img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/08\/image-1692637152759.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 281px; --smush-placeholder-aspect-ratio: 281\/377;\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E5%8A%A0%EF%BC%88%E7%94%B5%E9%98%BB%E6%95%B0%E6%A8%A1%E8%BD%AC%E6%8D%A2%E6%A8%A1%E5%9D%97%EF%BC%89\"><\/span>\u52a0\uff08\u7535\u963b+\u6570\u6a21\u8f6c\u6362\u6a21\u5757\uff09<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u52a0\u7535\u963b\u7684\u65b9\u6848\u5df2\u7ecf\u51cf\u5c11\u4e86\u4e00\u534a\u7684\u72ec\u5360\u5f15\u811a\uff0c\u4f46\u8fd8\u662f\u6709 4 \u4e2a\u72ec\u5360\u7684\u3002\u8003\u8651\u5230\u4f7f\u7528\u7684\u662f\u6a21\u62df\u5f15\u811a\uff0c\u90a3\u4e48\u5c31\u53ef\u4ee5\u4f7f\u7528\u6570\u6a21\u8f6c\u6362\u6a21\u5757\uff0c\u6bd4\u5982\u8fd9\u91cc\u8ba1\u5212\u4f7f\u7528 PCF8591\uff08\u6811\u8393\u6d3e\u6ca1\u6709\u6a21\u62df\u5f15\u811a\uff0c\u4e4b\u524d\u4e70\u6765\u5728\u6811\u8393\u6d3e\u4e0a\u4f7f\u7528\u7684\uff0c\u540c\u65f6\u8fd9\u4e2a\u65b9\u6848\u5728\u6811\u8393\u6d3e\u4e0a\u4e5f\u53ef\u4ee5\u91c7\u7528\uff09\uff0c\u8fd9\u4e2a\u6a21\u5757\u521a\u597d\u6709 4 \u4e2a\u6a21\u62df\u8bfb\u5f15\u811a\u3002\u800c\u4fe1\u53f7\u8f93\u51fa\u662f\u901a\u8fc7 IIC\uff0c\u90a3\u4e48\u5c31\u53ef\u4ee5\u5171\u7528\u7ebf\u8def\uff0c\u4e0d\u540c\u8bbe\u5907\u662f\u53ef\u4ee5\u901a\u8fc7\u5730\u5740\u533a\u5206\u7684\uff0c\u76f8\u5f53\u4e8e\u5b8c\u5168\u4e0d\u72ec\u81ea\u5360\u7528 Arduino \u5f15\u811a\u3002<\/p>\n<p>\u8fd9\u91cc PCF8591 \u4f7f\u7528\u5e93\u4e3a\uff1a<br \/>\nPCF8591_library 1.1.1\uff1a<a href=\"https:\/\/github.com\/xreef\/PCF8591_library\">https:\/\/github.com\/xreef\/PCF8591_library<\/a><\/p>\n<p>\u6211\u67e5\u4e00\u4e0b\u8d44\u6599\uff0c\u6ca1\u627e\u5230\u8bf4 PCF8591 \u652f\u6301\u4e0a\u62c9\u7535\u963b\u7684\uff0c\u4f7f\u7528\u7684\u5e93\u4e5f\u6ca1\u6709\u63d0\u4f9b\u4e0a\u62c9\u7535\u963b\u7684\u64cd\u4f5c\uff0c\u90a3\u5e94\u8be5\u5c31\u662f\u4e0d\u652f\u6301\u4e86\uff0c\u4e0a\u62c9\u7535\u963b\u5c31\u5f97\u81ea\u5df1\u5b9e\u73b0\u4e86\uff0c\u7535\u8def\u4f1a\u66f4\u590d\u6742\u4e00\u70b9\u3002<br \/>\n<img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/08\/image-1692643057795.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 457px; --smush-placeholder-aspect-ratio: 457\/612;\" \/><\/p>\n<p>\u6211\u6ca1\u4e13\u95e8\u5b66\u8fc7\u7535\u8def\u8fd9\u4e9b\uff0c\u4e0d\u662f\u5f88\u61c2\u600e\u4e48\u753b\u56fe\uff0c\u5c31\u753b\u4e86\u4e00\u4e2a\u63a5\u7ebf\u7684\u8349\u56fe\u3002<br \/>\n<img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/08\/image-1692642087712.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 533px; --smush-placeholder-aspect-ratio: 533\/556;\" \/><\/p>\n<p>AIN0\u3001AIN1\u3001AIN2\u3001AIN3 \u56db\u4e2a\u6a21\u62df\u8bfb\u5f15\u811a\u65c1\u8fb9\u90fd\u63a5\u4e86\u4e00\u4e2a\u7535\u963b\uff0c\u7535\u963b\u7684\u53e6\u4e00\u7aef\u63a5\u5230 5V \u5f15\u811a\uff0c\u8fd9\u4e2a\u5c31\u662f\u4e0a\u62c9\u7535\u963b\uff0c\u628a\u8bfb\u5f15\u811a\u6302\u5230\u9ad8\u7535\u4f4d\uff0c\u63d0\u9ad8\u7a33\u5b9a\u6027\uff0c\u4e0d\u7136\u6ca1\u6709\u6309\u952e\u7684\u65f6\u5019\u8bfb\u503c\u5f88\u5bb9\u6613\u6ce2\u52a8\u3002<\/p>\n<p>PCF8591 \u7684\u6a21\u62df\u6570\u503c\u8303\u56f4\u548c Arduino \u7684\u6a21\u62df\u5f15\u811a\u4e0d\u540c\uff0c\u53d6\u503c\u8303\u56f4\u662f 0-255\u3002\u6839\u636e\u6d4b\u8bd5\u7ed3\u679c\uff0c\u7b2c\u4e00\u5217\u5bfc\u901a\u65f6\uff0c\u6570\u503c\u5927\u7ea6\u4e3a 1\uff1b\u7b2c\u4e8c\u5217\u5bfc\u901a\u65f6\uff0c\u6570\u503c\u5927\u7ea6\u4e3a 86\uff1b\u7b2c\u4e09\u5217\u5bfc\u901a\u65f6\uff0c\u6570\u503c\u5927\u7ea6\u4e3a 128\uff1b\u7b2c\u56db\u5217\u5bfc\u901a\u65f6\uff0c\u6570\u503c\u5927\u7ea6\u4e3a 155\u3002<\/p>\n<p>\u4ee3\u7801\u5b9e\u73b0\u903b\u8f91\u8fd8\u662f\u548c\u524d\u9762\u4e00\u79cd\u65b9\u6848\u4e00\u6837<\/p>\n<pre><code class=\"language-cpp\">#include &quot;PCF8591.h&quot;\n\n#define PCF8591_I2C_ADDRESS     0x48 \/\/ I2C \u5730\u5740\n\nPCF8591 pcf8591(PCF8591_I2C_ADDRESS);\n\nconst char keys [4][4] =\n{\n    {&#039;1&#039;, &#039;2&#039;, &#039;3&#039;, &#039;A&#039;},\n    {&#039;4&#039;, &#039;5&#039;, &#039;6&#039;, &#039;B&#039;},\n    {&#039;7&#039;, &#039;8&#039;, &#039;9&#039;, &#039;C&#039;},\n    {&#039;*&#039;, &#039;0&#039;, &#039;#&#039;, &#039;D&#039;}\n};\n\n\/\/ \u6839\u636e\u6a21\u62df\u4fe1\u53f7\u503c\u5224\u65ad\u6240\u5728\u5217\nint get_col(const int analog_num)\n{\n    if (analog_num &gt; 140)\n    {\n        return 3; \/\/ \u7b2c 4 \u5217\u6309\u4e0b\n    }\n    else if (analog_num &gt; 110)\n    {\n        return 2; \/\/ \u7b2c 3 \u5217\u6309\u4e0b\n    }\n    else if (analog_num &gt; 50)\n    {\n        return 1; \/\/ \u7b2c 2 \u5217\u6309\u4e0b\n    }\n    else\n    {\n        return 0; \/\/ \u7b2c 1 \u5217\u6309\u4e0b\n    }\n}\n\nchar read_key()\n{\n    PCF8591::AnalogInput ai = pcf8591.analogReadAll();\n    if (ai.ain0 &lt; 180) \/\/ \u4f4e\u4e8e 180 \u5224\u65ad\u67d0\u884c\u6709\u6309\u952e\u6309\u4e0b\n    {\n        return keys[0][get_col(ai.ain0)];\n    }\n    else if (ai.ain1 &lt; 180)\n    {\n        return keys[1][get_col(ai.ain1)];\n    }\n    else if (ai.ain2 &lt; 180)\n    {\n        return keys[2][get_col(ai.ain2)];\n    }\n    else if (ai.ain3 &lt; 180)\n    {\n        return keys[3][get_col(ai.ain3)];\n    }\n\n    return &#039;\\0&#039;;\n}\n\nvoid setup()\n{\n    Serial.begin(9600);\n\n    pcf8591.begin();\n}\n\nvoid loop()\n{\n    char key = read_key();\n    if (key != &#039;\\0&#039;)\n    {\n    Serial.println(key);\n    }\n    delay(200);\n}<\/code><\/pre>\n<p>\u9a8c\u8bc1\u53ef\u884c<br \/>\n<img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/08\/image-1692642923963.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 200px; --smush-placeholder-aspect-ratio: 200\/349;\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u524d\u8a00 \u8fd9\u79cd\u77e9\u9635\u952e\u76d8\uff0c\u4ece\u5de6\u5230\u53f3\u56db\u6839\u7ebf\u4f9d\u6b21\u5bf9\u5e94\u4e00\u5230\u56db\u884c\uff0c\u6700\u540e\u56db\u6839\u7ebf\u5bf9\u5e94\u4e00\u81f3\u56db\u5217\uff0c\u6309\u952e\u7684\u65f6\u5019\u67d0\u884c\u548c\u67d0\u5217\u5bfc\u901a\u5c31\u80fd\u786e\u5b9a\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":"no","_lmt_disable":"no","footnotes":""},"categories":[1],"tags":[],"class_list":["post-10944","post","type-post","status-publish","format-standard","hentry","category-all"],"modified_by":"IYATT-yx","_links":{"self":[{"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=\/wp\/v2\/posts\/10944","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=10944"}],"version-history":[{"count":0,"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=\/wp\/v2\/posts\/10944\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10944"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10944"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10944"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}