{"id":1165,"date":"2024-02-12T10:49:17","date_gmt":"2024-02-12T02:49:17","guid":{"rendered":"https:\/\/xujiwei.com\/blog\/?p=1165"},"modified":"2024-04-28T23:03:53","modified_gmt":"2024-04-28T15:03:53","slug":"diy-usb-meter-schematic","status":"publish","type":"post","link":"https:\/\/xujiwei.com\/blog\/2024\/02\/diy-usb-meter-schematic\/","title":{"rendered":"DIY USB \u7535\u6d41\u8868\uff081\uff09\uff1a\u5143\u4ef6\u9009\u578b\u548c\u539f\u7406\u56fe\u7ed8\u5236"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_65 ez-toc-wrap-right counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<p class=\"ez-toc-title\">\u6587\u7ae0\u76ee\u5f55<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-69d17d2b7675d\" class=\"ez-toc-cssicon-toggle-label\"><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><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-69d17d2b7675d\"  aria-label=\"Toggle\" \/><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:\/\/xujiwei.com\/blog\/2024\/02\/diy-usb-meter-schematic\/#USB_%E7%94%B5%E6%B5%81%E8%A1%A8%E6%88%90%E5%93%81%E6%95%88%E6%9E%9C\" title=\"USB \u7535\u6d41\u8868\u6210\u54c1\u6548\u679c\">USB \u7535\u6d41\u8868\u6210\u54c1\u6548\u679c<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/xujiwei.com\/blog\/2024\/02\/diy-usb-meter-schematic\/#%E9%9C%80%E6%B1%82%E5%88%86%E6%9E%90%E5%92%8C%E5%85%83%E4%BB%B6%E9%80%89%E5%9E%8B\" title=\"\u9700\u6c42\u5206\u6790\u548c\u5143\u4ef6\u9009\u578b\">\u9700\u6c42\u5206\u6790\u548c\u5143\u4ef6\u9009\u578b<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/xujiwei.com\/blog\/2024\/02\/diy-usb-meter-schematic\/#%E9%9C%80%E6%B1%82%E5%88%86%E6%9E%90\" title=\"\u9700\u6c42\u5206\u6790\">\u9700\u6c42\u5206\u6790<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/xujiwei.com\/blog\/2024\/02\/diy-usb-meter-schematic\/#MCU_%E9%80%89%E5%9E%8B\" title=\"MCU \u9009\u578b\">MCU \u9009\u578b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/xujiwei.com\/blog\/2024\/02\/diy-usb-meter-schematic\/#%E7%94%B5%E5%8E%8B%E3%80%81%E7%94%B5%E6%B5%81%E9%87%87%E9%9B%86%E9%80%89%E5%9E%8B\" title=\"\u7535\u538b\u3001\u7535\u6d41\u91c7\u96c6\u9009\u578b\">\u7535\u538b\u3001\u7535\u6d41\u91c7\u96c6\u9009\u578b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/xujiwei.com\/blog\/2024\/02\/diy-usb-meter-schematic\/#DC-DC_%E8%8A%AF%E7%89%87%E9%80%89%E5%9E%8B\" title=\"DC-DC \u82af\u7247\u9009\u578b\">DC-DC \u82af\u7247\u9009\u578b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/xujiwei.com\/blog\/2024\/02\/diy-usb-meter-schematic\/#%E5%B1%8F%E5%B9%95%E9%80%89%E5%9E%8B\" title=\"\u5c4f\u5e55\u9009\u578b\">\u5c4f\u5e55\u9009\u578b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/xujiwei.com\/blog\/2024\/02\/diy-usb-meter-schematic\/#%E5%85%83%E4%BB%B6%E5%B0%8F%E7%BB%93\" title=\"\u5143\u4ef6\u5c0f\u7ed3\">\u5143\u4ef6\u5c0f\u7ed3<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/xujiwei.com\/blog\/2024\/02\/diy-usb-meter-schematic\/#%E5%8E%9F%E7%90%86%E5%9B%BE%E8%AF%A6%E8%A7%A3\" title=\"\u539f\u7406\u56fe\u8be6\u89e3\">\u539f\u7406\u56fe\u8be6\u89e3<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/xujiwei.com\/blog\/2024\/02\/diy-usb-meter-schematic\/#USB_Type-C_%E8%BE%93%E5%85%A5%E8%BE%93%E5%87%BA%E6%8E%A5%E5%8F%A3\" title=\"USB Type-C \u8f93\u5165\u8f93\u51fa\u63a5\u53e3\">USB Type-C \u8f93\u5165\u8f93\u51fa\u63a5\u53e3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/xujiwei.com\/blog\/2024\/02\/diy-usb-meter-schematic\/#DC-DC_%E9%99%8D%E5%8E%8B%E4%BE%9B%E7%94%B5\" title=\"DC-DC \u964d\u538b\u4f9b\u7535\">DC-DC \u964d\u538b\u4f9b\u7535<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/xujiwei.com\/blog\/2024\/02\/diy-usb-meter-schematic\/#MCU_%E5%8E%9F%E7%90%86%E5%9B%BE\" title=\"MCU \u539f\u7406\u56fe\">MCU \u539f\u7406\u56fe<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/xujiwei.com\/blog\/2024\/02\/diy-usb-meter-schematic\/#INA219_%E7%94%B5%E5%8E%8B%E7%94%B5%E6%B5%81%E6%B5%8B%E9%87%8F\" title=\"INA219 \u7535\u538b\u7535\u6d41\u6d4b\u91cf\">INA219 \u7535\u538b\u7535\u6d41\u6d4b\u91cf<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/xujiwei.com\/blog\/2024\/02\/diy-usb-meter-schematic\/#%E5%B1%8F%E5%B9%95%E5%8F%8A%E6%8C%89%E9%94%AE\" title=\"\u5c4f\u5e55\u53ca\u6309\u952e\">\u5c4f\u5e55\u53ca\u6309\u952e<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/xujiwei.com\/blog\/2024\/02\/diy-usb-meter-schematic\/#%E4%B8%8B%E8%BD%BD%E5%8F%8A%E8%B0%83%E8%AF%95%E6%8E%A5%E5%8F%A3\" title=\"\u4e0b\u8f7d\u53ca\u8c03\u8bd5\u63a5\u53e3\">\u4e0b\u8f7d\u53ca\u8c03\u8bd5\u63a5\u53e3<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/xujiwei.com\/blog\/2024\/02\/diy-usb-meter-schematic\/#%E5%B0%8F%E7%BB%93\" title=\"\u5c0f\u7ed3\">\u5c0f\u7ed3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/xujiwei.com\/blog\/2024\/02\/diy-usb-meter-schematic\/#%E9%A1%B9%E7%9B%AE%E5%BC%80%E6%BA%90%E5%9C%B0%E5%9D%80\" title=\"\u9879\u76ee\u5f00\u6e90\u5730\u5740\">\u9879\u76ee\u5f00\u6e90\u5730\u5740<\/a><\/li><\/ul><\/nav><\/div>\n<p>USB \u7535\u6d41\u8868\u5728\u7535\u5b50 DIY \u4e2d\u8fd8\u662f\u6bd4\u8f83\u5e38\u7528\u7684\uff0c\u53ef\u4ee5\u7528\u5b83\u6765\u89c2\u5bdf\u76ee\u6807\u8bbe\u5907\u7684\u5b9e\u65f6\u7535\u6d41\u3001\u7535\u538b\u4ee5\u53ca\u529f\u8017\u3002<\/p>\n<p>\u4f5c\u4e3a\u7535\u5b50 DIY \u7231\u597d\u8005\uff0c\u505a\u4e00\u4e2a\u81ea\u5df1\u7684 USB \u7535\u6d41\u8868\u4e5f\u662f\u4e00\u4ef6\u987a\u7406\u6210\u7ae0\u7684\u4e8b\u3002\u8fd9\u91cc\u628a\u4e4b\u524d\u5df2\u7ecf\u5f00\u6e90\u7684\u4e00\u4e2a USB \u7535\u6d41\u8868\u7684\u539f\u7406\u56fe\u6765\u6dfb\u52a0\u4e00\u4e9b\u8be6\u7ec6\u8bf4\u660e\uff0c\u5bf9\u4e8e\u521d\u5b66\u8005\u6765\u8bf4\u53ef\u4ee5\u5927\u6982\u641e\u660e\u767d\u4e00\u4e2a\u7b80\u5355\u8bbe\u5907\u7684\u539f\u7406\u56fe\u8be5\u600e\u4e48\u753b\u3002<\/p>\n<p>\u5f53\u7136\u6211\u4e5f\u8fd8\u662f\u4e00\u4e2a\u521d\u5b66\u8005\uff0c\u5982\u679c\u6587\u7ae0\u4e2d\u6709\u4e00\u4e9b\u9519\u8bef\u6216\u4e0d\u8db3\uff0c\u8fd8\u8bf7\u591a\u591a\u6307\u6559\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"USB_%E7%94%B5%E6%B5%81%E8%A1%A8%E6%88%90%E5%93%81%E6%95%88%E6%9E%9C\"><\/span>USB \u7535\u6d41\u8868\u6210\u54c1\u6548\u679c<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>\u7535\u538b\u3001\u7535\u6d41\u3001\u529f\u7387\u3001\u5bb9\u91cf\u754c\u9762<\/strong><\/p>\n<p><img src=\"https:\/\/xujiwei.com\/blog\/wp-content\/uploads\/2024\/02\/diy-usbmeter-ui1.jpg\" alt=\"ui-1\" style=\"max-width:500px;\" \/><\/p>\n<p><strong>\u529f\u7387\u5386\u53f2\u56fe\u8868\u754c\u9762<\/strong><\/p>\n<p><img src=\"https:\/\/xujiwei.com\/blog\/wp-content\/uploads\/2024\/02\/diy-usbmeter-ui2.jpg\" alt=\"ui-2\" style=\"max-width:500px;\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E9%9C%80%E6%B1%82%E5%88%86%E6%9E%90%E5%92%8C%E5%85%83%E4%BB%B6%E9%80%89%E5%9E%8B\"><\/span>\u9700\u6c42\u5206\u6790\u548c\u5143\u4ef6\u9009\u578b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u5728\u6700\u5f00\u59cb\u641e\u4e00\u4e2a\u5165\u95e8 DIY \u7684\u4ea7\u54c1\uff0c\u8fd8\u662f\u4e0d\u8981\u641e\u592a\u590d\u6742\uff0c\u5c3d\u91cf\u4ece\u7b80\u5355\u7684\u5f00\u59cb\uff0c\u5148\u786e\u5b9a\u4e00\u4e0b\u9700\u6c42\u8303\u56f4\uff0c\u964d\u4f4e\u6574\u4f53\u5f00\u53d1\u96be\u5ea6\uff0c\u4e00\u65b9\u9762\u51cf\u5c11\u539f\u7406\u56fe\u7ed8\u5236\u4e4b\u7c7b\u7684\u5de5\u4f5c\u91cf\uff0c\u53e6\u5916\u4e00\u65b9\u9762\uff0c\u4e5f\u53ef\u4ee5\u589e\u52a0\u6210\u529f\u7387\uff0c\u9632\u6b62\u534a\u8def\u5f03\u5751 \ud83e\udd23\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E9%9C%80%E6%B1%82%E5%88%86%E6%9E%90\"><\/span>\u9700\u6c42\u5206\u6790<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u4f5c\u4e3a\u4e00\u4e2a USB \u7535\u6d41\u8868\uff0c\u4e3b\u8981\u529f\u80fd\u5c31\u662f\u7535\u6d41\u3001\u7535\u538b\u7b49\u6307\u6807\u7684\u91c7\u96c6\uff0c\u4ee5\u53ca\u4f5c\u4e3a\u73b0\u5728\u5df2\u7ecf\u666e\u53ca\u5ea6\u975e\u5e38\u9ad8\u7684 USB Type-C \u63a5\u53e3\u548c USB PD \u5145\u7535\u90fd\u9700\u8981\u652f\u6301\u4e00\u4e0b\uff0c\u7136\u540e\u518d\u901a\u8fc7\u5c4f\u5e55\u5c55\u793a\u51fa\u6765\u91c7\u96c6\u7684\u6570\u636e\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n<p>\u56e0\u6b64\u6839\u636e\u9700\u6c42\u5927\u6982\u786e\u5b9a\u4ee5\u4e0b\u529f\u80fd\u70b9\uff1a<\/p>\n<ul>\n<li>USB Type-C \u8f93\u5165\u4e0e\u8f93\u51fa<\/li>\n<li>PD \u534f\u8bae\u900f\u4f20<\/li>\n<li>\u652f\u6301 5\uff5e20V \u7535\u538b\u68c0\u6d4b<\/li>\n<li>\u652f\u6301 0\uff5e5A \u7535\u6d41\u68c0\u6d4b<\/li>\n<li>\u652f\u6301\u529f\u7387\u8ba1\u7b97\u3001\u5bb9\u91cf\u7edf\u8ba1<\/li>\n<li>\u652f\u6301\u529f\u7387\u5386\u53f2\u56fe\u8868\u663e\u793a<\/li>\n<li>\u652f\u6301\u7edf\u8ba1\u6570\u636e\u8bb0\u5f55\u4e0e\u6e05\u9664<\/li>\n<li>\u6309\u952e\u5207\u6362\u7535\u538b\u7535\u6d41\u6570\u636e\u4e0e\u529f\u7387\u5386\u53f2\u56fe\u8868<\/li>\n<li>\u4f7f\u7528 12864 OLED \u663e\u793a\u76f8\u5173\u6570\u636e<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"MCU_%E9%80%89%E5%9E%8B\"><\/span>MCU \u9009\u578b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u4e4b\u524d\u505a\u4e00\u4e9b DIY \u4ea7\u54c1\u7684\u65f6\u5019\uff0c\u4e00\u76f4\u90fd\u4f7f\u7528\u7684 ESP32 \u7cfb\u5217 MCU\uff0c\u4f46\u662f\u5bf9\u4e8e USB \u7535\u6d41\u8868\u8fd9\u6837\u4e00\u4e2a\u7b80\u5355\u7684\u4ea7\u54c1\uff0c\u5e76\u4e14\u4e0d\u51c6\u5907\u52a0\u4e0a Wi-Fi \u6216\u84dd\u7259\u6570\u636e\u4f20\u8f93\u529f\u80fd\uff0c\u56e0\u6b64\u5c31\u9700\u8981\u9009\u62e9\u53e6\u5916\u4e00\u6b3e MCU \u4ea7\u54c1\u3002<\/p>\n<p>\u5728\u4e00\u4e2a DIY \u7fa4\u91cc\u804a\u5929\u7684\u65f6\u5019\u770b\u5230\u6709\u63a8\u8350 WCH \u8fd9\u6b3e RISC-V \u7684\u4f4e\u529f\u8017 MCU CH32V003\uff0c\u5c31\u662f\u5b83\u4e86\uff0c\u5c1d\u8bd5\u4e00\u4e0b\u3002<\/p>\n<blockquote>\n<p>CH32V003 \u5b98\u7f51\uff1a<a href=\"https:\/\/www.wch.cn\/products\/CH32V003.html\">https:\/\/www.wch.cn\/products\/CH32V003.html<\/a><\/p>\n<p>CH32V003\u7cfb\u5217\u662f\u57fa\u4e8e\u9752\u7a1eRISC-V2A\u5185\u6838\u8bbe\u8ba1\u7684\u5de5\u4e1a\u7ea7\u901a\u7528\u5fae\u63a7\u5236\u5668\uff0c\u652f\u630148MHz\u7cfb\u7edf\u4e3b\u9891\uff0c\u5177\u6709\u5bbd\u538b\u3001\u5355\u7ebf\u8c03\u8bd5\u3001\u4f4e\u529f\u8017\u3001\u8d85\u5c0f\u5c01\u88c5\u7b49\u7279\u70b9\u3002CH32V003\u7cfb\u5217\u5185\u7f6e1\u7ec4DMA\u63a7\u5236\u5668\u30011\u7ec410\u4f4d\u6a21\u6570\u8f6c\u6362ADC\u30011\u7ec4\u8fd0\u653e\u6bd4\u8f83\u5668\u3001\u591a\u7ec4\u5b9a\u65f6\u5668\u4ee5\u53ca\u6807\u51c6\u901a\u8baf\u63a5\u53e3USART\u3001IIC\u3001SPI\u7b49\u3002<\/p>\n<\/blockquote>\n<p><strong>CH32V003 \u4e3b\u8981\u53c2\u6570<\/strong><\/p>\n<ul>\n<li>\u9752\u7a1e32\u4f4dRISC-V2A\u5904\u7406\u5668\uff0c\u652f\u63012\u7ea7\u4e2d\u65ad\u5d4c\u5957<\/li>\n<li>\u6700\u9ad848MHz\u7cfb\u7edf\u4e3b\u9891<\/li>\n<li>2KB SRAM\uff0c16KB Flash<\/li>\n<li>\u4f9b\u7535\u7535\u538b\uff1a3.3\/5V<\/li>\n<li>\u591a\u79cd\u4f4e\u529f\u8017\u6a21\u5f0f\uff1a\u7761\u7720\u3001\u5f85\u673a<\/li>\n<li>\u4e0a\/\u4e0b\u7535\u590d\u4f4d\u3001\u53ef\u7f16\u7a0b\u7535\u538b\u76d1\u6d4b\u5668<\/li>\n<li>1\u7ec41\u8def\u901a\u7528DMA\u63a7\u5236\u5668<\/li>\n<li>1\u7ec4\u8fd0\u653e\u6bd4\u8f83\u5668<\/li>\n<li>1\u7ec410\u4f4dADC<\/li>\n<li>1\u4e2a16\u4f4d\u9ad8\u7ea7\u5b9a\u65f6\u5668\u548c1\u4e2a16\u4f4d\u901a\u7528\u5b9a\u65f6\u5668<\/li>\n<li>2\u4e2a\u770b\u95e8\u72d7\u5b9a\u65f6\u5668\u548c1\u4e2a32\u4f4d\u7cfb\u7edf\u65f6\u57fa\u5b9a\u65f6\u5668<\/li>\n<li>1\u4e2aUSART\u63a5\u53e3\u30011\u7ec4IIC\u63a5\u53e3\u30011\u7ec4SPI\u63a5\u53e3<\/li>\n<li>18\u4e2aI\/O\u53e3\uff0c\u6620\u50cf\u4e00\u4e2a\u5916\u90e8\u4e2d\u65ad<\/li>\n<li>64\u4f4d\u82af\u7247\u552f\u4e00ID<\/li>\n<li>\u4e32\u884c\u5355\u7ebf\u8c03\u8bd5\u63a5\u53e3<\/li>\n<li>\u5c01\u88c5\u5f62\u5f0f\uff1aTSSOP20\u3001QFN20\u3001SOP16\u3001SOP8<\/li>\n<\/ul>\n<p>\u5bf9\u4e8e\u672c\u9879\u76ee\u6765\u8bf4\uff0c\u4f7f\u7528 12864 OLED \u4ee5\u53ca INA219 \u9700\u8981 I2C \u63a5\u53e3\uff0c\u6309\u952e\u9700\u8981\u4f7f\u7528\u666e\u901a GPIO\uff0cUART \u7528\u4e8e\u8c03\u8bd5\u4fe1\u606f\u8f93\u51fa\uff0cSDIO \u7528\u4e8e\u70e7\u5f55\uff0c\u5bf9\u6bd4\u4e4b\u540e\u53d1\u73b0\uff0cTSSOP20 \u5c01\u88c5\u7684 CH32V003F4P6 \u66f4\u9002\u5408\uff0c\u5b83\u76f8\u6bd4\u4f7f\u7528 SOP8 \u5c01\u88c5\u7684 CH32V003J4M6 \u62e5\u6709\u66f4\u591a GPIO\uff0c\u5e76\u4e14 UART \u548c SDIO \u4e5f\u6ca1\u6709\u590d\u7528\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u6ee1\u8db3\u672c\u9879\u76ee\u7684\u9700\u6c42\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E7%94%B5%E5%8E%8B%E3%80%81%E7%94%B5%E6%B5%81%E9%87%87%E9%9B%86%E9%80%89%E5%9E%8B\"><\/span>\u7535\u538b\u3001\u7535\u6d41\u91c7\u96c6\u9009\u578b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u4f5c\u4e3a\u4e00\u4e2a USB \u7535\u6d41\u8868\uff0c\u6700\u91cd\u8981\u7684\u5f53\u7136\u662f\u7535\u538b\u3001\u7535\u6d41\u7684\u68c0\u6d4b\uff0c\u8fd9\u4e2a\u53ef\u4ee5\u901a\u8fc7\u8fd0\u653e\u6765\u5b8c\u6210\uff0c\u4e5f\u53ef\u4ee5\u76f4\u63a5\u9009\u7528\u73b0\u6210\u7684\u82af\u7247\uff0c\u8fd9\u91cc\u4e3a\u4e86\u7b80\u5355\uff0c\u76f4\u63a5\u9009\u7528\u73b0\u6210\u7684\u82af\u7247\uff0c\u56e0\u4e3a\u4e4b\u524d\u7528\u8fc7 TI \u7684 INA219\uff0c\u5c31\u76f4\u63a5\u9009\u7528\u8fd9\u6b3e\u4e86\u3002<\/p>\n<blockquote>\n<p>INA219 \u5b98\u7f51\uff1a<a href=\"https:\/\/www.ti.com.cn\/product\/cn\/INA219\">https:\/\/www.ti.com.cn\/product\/cn\/INA219<\/a><\/p>\n<p>INA219 \u662f\u4e00\u6b3e\u5177\u5907 I2C \u6216 SMBUS \u517c\u5bb9\u63a5\u53e3\u7684\u5206\u6d41\u5668\u548c\u529f\u7387\u76d1\u6d4b\u8ba1\u3002\u8be5\u5668\u4ef6\u76d1\u6d4b\u5206\u6d41\u5668\u7535\u538b\u964d\u548c\u603b\u7ebf\u7535\u6e90\u7535\u538b\uff0c\u8f6c\u6362\u6b21\u6570\u548c\u6ee4\u6ce2\u9009\u9879\u53ef\u901a\u8fc7\u7f16\u7a0b\u8bbe\u5b9a\u3002\u53ef\u7f16\u7a0b\u6821\u51c6\u503c\u4e0e\u5185\u90e8\u4e58\u6cd5\u5668\u76f8\u7ed3\u5408\uff0c\u652f\u6301\u76f4\u63a5\u8bfb\u53d6\u7535\u6d41\u503c\uff08\u5355\u4f4d\uff1a\u5b89\u57f9\uff09\u3002\u901a\u8fc7\u9644\u52a0\u4e58\u6cd5\u5bc4\u5b58\u5668\u53ef\u8ba1\u7b97\u529f\u7387\uff08\u5355\u4f4d\uff1a\u74e6\uff09\u3002I2C \u6216 SMBUS \u517c\u5bb9\u63a5\u53e3 \u5177\u6709 16 \u4e2a\u53ef\u7f16\u7a0b\u5730\u5740\u3002<\/p>\n<\/blockquote>\n<p>INA219 \u7684\u7535\u538b\u6700\u5927\u91cf\u7a0b\u4e3a 26V\uff0c\u5728 PD2.0 100W \u4e2d\uff0c\u6700\u5927 20V \u662f\u8db3\u591f\u4f7f\u7528\u7684\uff0c\u4f46\u662f\u5982\u679c\u78b0\u5230\u652f\u6301 PD3.1 140W\uff0c\u4f7f\u7528 28V \u4f9b\u7535\u65f6\uff0c\u5c31\u4f1a\u8d85\u91cf\u7a0b\u4e86\u3002\u4f46\u662f\u76ee\u524d\u770b\u652f\u6301 140W \u7684\u5145\u7535\u5668\u548c\u8bbe\u5907\u90fd\u6bd4\u8f83\u5c11\uff0c\u6682\u65f6\u4e0d\u7ea0\u7ed3\u8fd9\u4e2a\u95ee\u9898\u3002\u540e\u7eed\u53ef\u4ee5\u8003\u8651\u4f7f\u7528 INA226 \u6765\u4ee3\u66ff\uff0c\u5b83\u5177\u5907\u66f4\u9ad8\u7684\u91cf\u7a0b\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"DC-DC_%E8%8A%AF%E7%89%87%E9%80%89%E5%9E%8B\"><\/span>DC-DC \u82af\u7247\u9009\u578b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u56e0\u4e3a\u672c\u9879\u76ee\u4e2d\u7684 USB \u7535\u6d41\u8868\u9700\u8981\u652f\u6301 USB PD \u5e76\u4e14\u4f1a\u6709\u6700\u9ad8 100W \u7684\u68c0\u6d4b\u9700\u6c42\uff0c\u5728\u8fd9\u65f6 USB \u63a5\u53e3\u4e2d\u7684 VBUS \u7535\u538b\u4f1a\u6700\u9ad8\u5230\u8fbe 20V\uff0c\u800c\u9879\u76ee\u4e2d\u4f7f\u7528\u7684 CH32V003 \u548c INA219 \u5e76\u4e0d\u652f\u6301\u5728\u8fd9\u6837\u7684\u9ad8\u7535\u538b\u4e0b\u5de5\u4f5c\uff0c\u56e0\u6b64\u9700\u8981\u4f7f\u7528\u4e00\u6b3e DC-DC \u82af\u7247\u6765\u5c06 VBUS \u964d\u538b\u5230 3.3V \u4f9b MCU \u4ee5\u53ca INA219 \u4f7f\u7528\u3002<\/p>\n<blockquote>\n<p>LGS5145\uff1a<a href=\"https:\/\/item.szlcsc.com\/5718438.html\">https:\/\/item.szlcsc.com\/5718438.html<\/a><\/p>\n<p>LGS5145 \u662f\u4e00\u79cd\u5e26\u5185\u90e8\u5f00\u5173\u7684\u964d\u538b DC\/DC \u7a33\u538b\u5668\uff0c\u5177\u5907SKIP \u63a7\u5236\u6a21\u5f0f\uff0c\u5c06\u4f4e\u9759\u6001\u7535\u6d41\u4e0e\u9ad8\u5f00\u5173\u9891\u7387\u76f8\u7ed3\u5408\uff0c\u53ef\u5728\u5e7f\u6cdb\u7684\u8d1f\u8f7d\u7535\u6d41\u8303\u56f4\u5185\u5b9e\u73b0\u9ad8\u6548\u7387\u3002 SKIP \u6a21\u5f0f\u4f7f\u7528\u77ed\u7684\u201c\u7a81\u53d1&quot;\u5468\u671f\u901a\u8fc7\u5185\u90e8\u529f\u7387 MOSFET \u5207\u6362\u7535\u611f\u7535\u6d41\uff0c\u7136\u540e\u662f\u4f11\u7720\u5468\u671f\uff0c\u5728\u4f11\u7720\u5468\u671f\u4e2d\uff0c\u7535\u6e90\u5f00\u5173\u5173\u95ed\uff0c\u8d1f\u8f7d\u7535\u6d41\u7531\u8f93\u51fa\u7535\u5bb9\u5668\u63d0\u4f9b\u3002\u5728\u8f7b\u8d1f\u8f7d\u65f6\uff0c\u7a81\u53d1\u5468\u671f\u5360\u603b\u5468\u671f\u65f6\u95f4\u7684\u4e00\u5c0f\u90e8\u5206\uff0c\u4f7f\u5e73\u5747\u7535\u6e90\u7535\u6d41\u6700\u5c0f\u5316\uff0c\u5927\u5927\u63d0\u9ad8\u4e86\u8f7b\u8d1f\u8f7d\u65f6\u7684\u6548\u7387\u3002<\/p>\n<p>LGS5145 \u5177\u6709 4.5V~55V \u7684\u5bbd\u8f93\u5165\u7535\u538b\u8303\u56f4\uff0c\u4ece\u800c\u6700\u5927\u9650\u5ea6\u5730\u51cf\u5c11\u5bf9\u5916\u90e8\u6d6a\u6d8c\u6291\u5236\u7ec4\u4ef6\u7684\u9700\u6c42\u3002\u4f7f\u5176\u6210\u4e3a\u5bbd\u8f93\u5165\u7535\u6e90\u8303\u56f4\u5de5\u4e1a\u548c\u9ad8\u7535\u6c60\u8282\u6570\u7535\u6c60\u7ec4\u5e94\u7528\u7684\u7406\u60f3\u9009\u62e9\u3002LGS5145 \u5177\u6709\u96c6\u6210\u5f0f\u4f4e\u963b\u503c 0.6\u03a9 \u9ad8\u4fa7\u529f\u7387 MOSFET \uff0c\u53ef\u63d0\u4f9b\u81f3\u5c11 0.6A \u7684\u8f93\u51fa\u7535\u6d41\u80fd\u529b\uff0c\u5177\u6709\u51fa\u8272\u7684\u8d1f\u8f7d\u548c\u7ebf\u8def\u77ac\u6001\u54cd\u5e94\u3002<\/p>\n<\/blockquote>\n<p>\u5728\u7acb\u521b\u5546\u57ce\u641c\u7d22\u4e86\u4e00\u4e0b\u4e4b\u540e\uff0c\u9009\u62e9\u4e86\u8fd9\u6b3e\u4f53\u79ef\u6bd4\u8f83\u5c0f\u7684 DC-DC \u7535\u6e90\u82af\u7247\uff0c\u4f7f\u7528 SOT-23 \u5c01\u88c5\uff0c\u5e76\u4e14\u652f\u6301\u6700\u9ad8 40V \u8f93\u5165\u7535\u538b\uff0c\u53ef\u4ee5\u5e94\u5bf9 USB PD \u6700\u9ad8 20V \u8f93\u5165\u7535\u538b\u7684\u964d\u538b\u9700\u6c42\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E5%B1%8F%E5%B9%95%E9%80%89%E5%9E%8B\"><\/span>\u5c4f\u5e55\u9009\u578b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u4f5c\u4e3a\u4e00\u6b3e\u7b80\u6613 USB \u7535\u6d41\u8868\uff0c\u76f4\u63a5\u7528\u6700\u5e38\u7528\u7684 12864 OLED \u5c4f\u5e55\u5c31\u8db3\u591f\u7528\u4e86\uff0c\u53e6\u5916\u4e3a\u4e86\u964d\u4f4e\u5236\u4f5c\u96be\u5ea6\uff0c\u8fd9\u91cc\u76f4\u63a5\u7528\u4e86\u73b0\u6210\u7684 OLED \u5c4f\u5e55\u6a21\u5757\uff0c\u7701\u53bb\u710a\u63a5\u5c4f\u5e55\u4ee5\u53ca\u5b83\u7684\u4e00\u5806\u5916\u56f4\u5143\u4ef6\u3002<\/p>\n<p>\u540c\u65f6\u4e3a\u4e86\u5f00\u53d1\u7b80\u5355\uff0c\u590d\u7528\u5f00\u6e90\u9879\u76ee\u4e2d\u7684 I2C \u901a\u4fe1\u4ee3\u7801\uff0c\u8fd9\u91cc\u4e5f\u9009\u7528\u4e86\u56db\u9488 I2C \u63a5\u53e3\u7684 12864 OLED \u5c4f\u5e55\u6a21\u5757\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E5%85%83%E4%BB%B6%E5%B0%8F%E7%BB%93\"><\/span>\u5143\u4ef6\u5c0f\u7ed3<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u6700\u7ec8\u6211\u4eec\u9009\u5b9a\u7684\u5143\u4ef6\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>MCU\uff1aWCH CH32V003F4P6<\/li>\n<li>\u7535\u538b\u76d1\u6d4b\uff1aTI INA219<\/li>\n<li>DC-DC\uff1aLGS5145<\/li>\n<li>\u5c4f\u5e55\uff1a0.96 \u5bf8 12864 OLED \u5c4f\u5e55\u6a21\u5757<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"%E5%8E%9F%E7%90%86%E5%9B%BE%E8%AF%A6%E8%A7%A3\"><\/span>\u539f\u7406\u56fe\u8be6\u89e3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"USB_Type-C_%E8%BE%93%E5%85%A5%E8%BE%93%E5%87%BA%E6%8E%A5%E5%8F%A3\"><\/span>USB Type-C \u8f93\u5165\u8f93\u51fa\u63a5\u53e3<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><img src=\"https:\/\/xujiwei.com\/blog\/wp-content\/uploads\/2024\/02\/diy-usbmeter-usbc.png\" alt=\"usb type-c\" style=\"max-width:500px;\" \/><\/p>\n<p>\u4e3a\u4e86\u4fdd\u6301\u7535\u6d41\u8868\u4f53\u79ef\u5c0f\u5de7\uff0c\u56e0\u6b64\u6ca1\u6709\u6dfb\u52a0 USB Type-A \u63a5\u53e3\uff0c\u8f93\u5165\u8f93\u51fa\u5747\u4f7f\u7528\u4e86 USB Type-C \u63a5\u53e3\u3002<\/p>\n<p>\u5e76\u4e14\u56e0\u4e3a\u9700\u8981\u652f\u6301 USB PD \u4f9b\u7535\uff0c\u7528\u7535\u8bbe\u5907\u548c\u5145\u7535\u5668\u4e4b\u524d\u9700\u8981\u4f7f\u7528 CC1 \u6216 CC2 \u914d\u7f6e\u7ebf\u8fdb\u884c\u534f\u5546\uff0c\u56e0\u6b64 USB Type-C \u6bcd\u5ea7\u5747\u4f7f\u7528\u4e86\u4f7f\u7528\u4e86 16P \u7684\u7248\u672c\u3002<\/p>\n<p><strong>\u4e24\u4e2a\u6bcd\u5ea7\u7684 VBUS \u7f51\u7edc\uff0c\u4e00\u4e2a\u4f7f\u7528\u7684 VBUS\uff0c\u53e6\u5916\u4e00\u4e2a\u4f7f\u7528\u7684\u662f VBUS_OUT\uff0c\u662f\u56e0\u4e3a\u8fd9\u4e24\u4e2a\u6bcd\u5ea7\u4e2d\u95f4\u9700\u8981\u8fde\u63a5\u4e00\u4e2a\u91c7\u6837\u7535\u963b\uff0c\u56e0\u6b64\u9700\u8981\u4f7f\u7528\u4e0d\u4e00\u6837\u7684\u7f51\u7edc\u540d\u79f0\u3002<\/strong><\/p>\n<p>\u4e3a\u4e86\u8ba9\u7528\u7535\u8bbe\u5907\u548c\u5145\u7535\u5668\u4e4b\u95f4\u53ef\u4ee5\u6b63\u5e38\u8fdb\u884c USB PD \u534f\u8bae\u534f\u5546\uff0c\u56e0\u6b64\u9700\u8981\u5c06\u8f93\u5165\u8f93\u51fa\u7684 CC1\u3001CC2 \u5f15\u811a\u76f4\u63a5\u8fde\u901a\u3002<\/p>\n<p>USB Type-C \u7684\u5176\u5b83\u5f15\u811a\u5728 PD \u534f\u8bae\u4e2d\u5e76\u65e0\u5b9e\u9645\u4f7f\u7528\u573a\u666f\uff0c\u4e0d\u8fc7\u5176\u4ed6\u534f\u8bae\u4f8b\u5982 QC \u6216 APPLE 2.4A \u8fd8\u662f\u4f1a\u7528\u5230 D+\u3001D- \u7b49\u5f15\u811a\uff0c\u56e0\u6b64\u4e3a\u4e86\u4fdd\u8bc1\u517c\u5bb9\u6027\uff0c\u4e5f\u5c06\u5176\u4ed6\u5f15\u811a\u90fd\u76f4\u63a5\u8fde\u63a5\u3002<\/p>\n<p>\u8fd9\u6837\u4f7f\u7528\u6709\u4e24\u70b9\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ol>\n<li>\u56e0\u4e3a CC1\u3001CC2 \u6ca1\u6709\u8fde\u63a5 5.1K \u4e0b\u62c9\u7535\u963b\uff0c\u56e0\u6b64\u5728\u4f7f\u7528 C-C \u7ebf\u53ca PD \u5145\u7535\u5934\u65f6\uff0c\u7531\u4e8e\u5145\u7535\u5934\u65e0\u6cd5\u534f\u5546 PD \u534f\u8bae\uff0c\u56e0\u6b64\u4e0d\u4f1a\u4f9b\u7535\uff0c\u7535\u6d41\u8868\u4e5f\u65e0\u6cd5\u542f\u52a8\u3002<\/li>\n<li>\u56e0\u4e3a CC1\u3001CC2 \u662f\u76f4\u63a5\u8fde\u63a5\uff0c\u4e2d\u95f4\u65e0 MUX \u82af\u7247\uff0c\u56e0\u6b64\u5728\u4e24\u7aef\u5145\u7535\u7ebf\u5728\u63a5\u53cd\u7684\u60c5\u51b5\u4e0b\uff0c\u540c\u6837\u65e0\u6cd5\u534f\u5546 PD \u534f\u8bae\u3002<\/li>\n<\/ol>\n<p>\u53c8\u56e0\u4e3a\u4e24\u8fb9\u7684 USB Type-C \u63a5\u5934\u662f\u76f4\u901a\u7684\uff0c\u56e0\u6b64\u5176\u5b9e\u4e0d\u5b58\u5728\u54ea\u5934\u7528\u4e8e\u8f93\u5165\u54ea\u5934\u7528\u4e8e\u8f93\u51fa\u7684\u60c5\u51b5\uff0c\u968f\u4fbf\u54ea\u4e00\u8fb9\u63a5\u5145\u7535\u5668\u4fa7\u90fd\u53ef\u4ee5\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"DC-DC_%E9%99%8D%E5%8E%8B%E4%BE%9B%E7%94%B5\"><\/span>DC-DC \u964d\u538b\u4f9b\u7535<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><img src=\"https:\/\/xujiwei.com\/blog\/wp-content\/uploads\/2024\/02\/diy-usbmeter-dcdc.jpg\" alt=\"dcdc\" style=\"zoom:50%;\" \/><\/p>\n<p>\u539f\u7406\u56fe\u76f4\u63a5\u6839\u636e LGS5145 \u6570\u636e\u624b\u518c\u7ed8\u5236\uff0c\u4e00\u822c\u6765\u8bf4\u5927\u90e8\u5206\u82af\u7247\u90fd\u4f1a\u63d0\u4f9b\u5178\u578b\u5e94\u7528\u7535\u8def\uff0c\u6309\u7167\u6570\u636e\u624b\u518c\u4e2d\u7684\u8bf4\u660e\u6765\u7ed8\u5236\u539f\u7406\u56fe\u901a\u5e38\u6ca1\u6709\u4ec0\u4e48\u5927\u95ee\u9898\u3002<\/p>\n<p>\u56fe\u4e2d R5\u3001R6\u3001R7 \u4e3a\u5206\u538b\u53cd\u9988\u7535\u963b\uff0c\u4ece\u6570\u636e\u624b\u518c\u4e2d <strong>\u8bbe\u5b9a\u8f93\u51fa\u7535\u538b<\/strong> \u4e00\u8282\u53ef\u4ee5\u770b\u5230\u5206\u538b\u7535\u963b\u8ba1\u7b97\u516c\u5f0f\uff1a<\/p>\n<p><img src=\"https:\/\/xujiwei.com\/blog\/wp-content\/uploads\/2024\/02\/diy-usbmeter-voltage.png\" alt=\"lgs5145 output voltage\" style=\"max-width:500px;\" \/><\/p>\n<p>\u6839\u636e\u516c\u5f0f\u53ef\u4ee5\u7b97\u51fa\u5b9e\u9645\u8f93\u51fa\u7535\u538b\u4e3a Vout = 0.812 * (40K \/ 10K) = 3.428V\uff0c\u9ad8\u51fa\u4e00\u70b9\u70b9\uff0c\u5728 MCU \u548c INA219 \u7684\u8f93\u5165\u7535\u538b\u5141\u8bb8\u8303\u56f4\uff0c\u95ee\u9898\u4e5f\u4e0d\u5927\u3002\u9009\u7528\u8fd9\u4e9b\u963b\u503c\u4e3b\u8981\u662f\u56e0\u4e3a\u624b\u4e0a\u6709 10K \u4ee5\u53ca 20K\uff0c\u4e0d\u60f3\u518d\u4e70\u989d\u5916\u7684\u7535\u963b\u4e86\uff0c\u5982\u679c\u6ca1\u6709\u590d\u7528\u9700\u6c42\u7684\u8bdd\uff0c\u53ef\u4ee5\u76f4\u63a5\u6309\u6570\u636e\u624b\u518c\u5efa\u8bae\u7684\u8d2d\u4e70\u7535\u963b\u3002<\/p>\n<p>C6 \u4e3a\u524d\u9988\u8865\u507f\u7535\u5bb9\uff0c\u901a\u5e38\u662f\u4e3a\u4e86\u589e\u52a0 DC-DC \u8f93\u51fa\u7535\u6d41\u53d8\u5316\u65f6\u7684\u54cd\u5e94\u901f\u5ea6\uff0c\u53ef\u4ee5\u4e0d\u52a0\u3002<\/p>\n<p>\u6574\u4e2a DC-DC \u6700\u7ec8\u8f93\u51fa\u7f51\u7edc\u4e3a <strong>V3.3<\/strong>\u3002<\/p>\n<p>\u53e6\u5916\uff0c\u4e3a\u4e86\u6307\u793a DC-DC \u662f\u5426\u6b63\u5e38\u5de5\u4f5c\uff0c\u5728 DC-DC \u8fd9\u90e8\u5206\u4e5f\u6dfb\u52a0\u4e86\u4e00\u4e2a LED \u6307\u793a\u7535\u6e90\u5de5\u4f5c\u72b6\u6001\uff0c\u5e76\u4f7f\u7528 10K \u7684\u9650\u6d41\u7535\u963b\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"MCU_%E5%8E%9F%E7%90%86%E5%9B%BE\"><\/span>MCU \u539f\u7406\u56fe<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><img src=\"https:\/\/xujiwei.com\/blog\/wp-content\/uploads\/2024\/02\/diy-usbmeter-mcu.png\" alt=\"ch32v003\" style=\"max-width:500px;\" \/><\/p>\n<p>CH32V003 \u8fd9\u5757\uff0c\u4f9b\u7535 3.3V\uff0c\u52a0\u4e0a 100nF \u53bb\u8026\u7535\u5bb9\uff0cI2C \u603b\u7ebf\u52a0\u4e86 10K \u4e0a\u62c9\u7535\u963b\u3002<\/p>\n<p>\u7f51\u7edc\u7528\u9014\u548c\u8bf4\u660e\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u8c03\u8bd5\u4f7f\u7528\u7684 TXD\u3001RXD<\/li>\n<li>\u5237\u673a\u4f7f\u7528\u7684 NRST\u3001SWDIO<\/li>\n<li>\u6309\u952e\u68c0\u6d4b GPIO BTN1\u3001BTN2<\/li>\n<li>I2C \u4ea7\u54c1\u7ebf I2C_SDA\u3001I2C_SCL\uff0c\u6839\u636e\u6570\u636e\u624b\u518c\uff0cCH32V003 \u4f7f\u7528 I2C \u65f6\uff0c\u9700\u8981\u5728 SCL\u3001SDA \u52a0\u4e0a\u4e0a\u62c9\u7535\u963b\uff0c\u8fd9\u91cc\u4f7f\u7528\u4e86 10K \u4e0a\u62c9\u7535\u963b<\/li>\n<li>SPI \u603b\u7ebf SPI_MISO\u3001SPI_MOSI\u3001SPI_SCK\uff0c\u4e0d\u8fc7\u672c\u9879\u76ee\u5e76\u672a\u4f7f\u7528 SPI<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"INA219_%E7%94%B5%E5%8E%8B%E7%94%B5%E6%B5%81%E6%B5%8B%E9%87%8F\"><\/span>INA219 \u7535\u538b\u7535\u6d41\u6d4b\u91cf<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><img src=\"https:\/\/xujiwei.com\/blog\/wp-content\/uploads\/2024\/02\/diy-usbmeter-ina219.jpg\" alt=\"ina219\" style=\"max-width:500px;\" \/><\/p>\n<p>INA219 \u4e5f\u4e0d\u9700\u8981\u592a\u591a\u5916\u56f4\u5143\u4ef6\uff0c\u53ea\u9700\u8981\u7ed9\u4f9b\u7535\u6dfb\u52a0\u4e00\u4e2a\u53bb\u8026\u7535\u5bb9\uff0c\u5e76\u5c06 VIN+ \u548c VIN- \u8fde\u63a5\u5230\u91c7\u6837\u7535\u963b\u4e24\u7aef\u5373\u53ef\u3002<\/p>\n<p>A0 \u548c A1 \u7528\u4e8e\u51b3\u5b9a MCU \u548c INA219 \u901a\u4fe1\u65f6\u4f7f\u7528\u7684\u5730\u5740\uff0c\u8fd9\u91cc\u90fd\u5c06\u5b83\u4eec\u63a5\u5730\uff0c\u6700\u7ec8 INA219 \u5c06\u4f7f\u7528 0x40 \u4f5c\u4e3a I2C \u901a\u4fe1\u65f6\u7684\u5730\u5740\u3002<\/p>\n<p>R2 \u4e3a\u91c7\u6837\u7535\u963b\uff0cINA219 \u5c31\u662f\u901a\u8fc7\u91c7\u96c6\u91c7\u6837\u7535\u963b\u4e24\u7aef\u7535\u963b\u7684\u5dee\u5e76\u7ed3\u5408\u6b27\u59c6\u5b9a\u5f8b\u6765\u8ba1\u7b97\u51fa\u5b9e\u9645\u901a\u8fc7\u7535\u8def\u4e2d\u7684\u7535\u6d41\u3002<\/p>\n<p>\u53e6\u5916\u8fd9\u4e2a USB \u7535\u6d41\u8868\u9879\u76ee\uff0c\u4e3a\u4e86\u80fd\u6d4b\u91cf\u6bd4\u8f83\u9ad8\u7684\u7535\u538b\uff0c\u5e76\u4e14\u907f\u514d\u8f83\u5927\u7684\u53d1\u70ed\uff0c\u8fd9\u91cc\u4f7f\u7528 10mR \u7684\u91c7\u6837\u7535\u963b\uff0c\u8fd9\u6837\u5373\u4f7f\u5728 100W 20V 5A \u65f6\uff0c\u529f\u8017\u4e5f\u53ea\u6709 0.25W\uff0c\u5b9e\u6d4b 100W \u957f\u65f6\u95f4\u8fd0\u884c\u4e5f\u4e0d\u53d1\u70eb\u3002<\/p>\n<p>SDA \u548c SCL \u8fde\u63a5\u5230\u7f51\u7edc I2C_SDA \u548c I2C_SCL\uff0c\u7528\u4e8e MCU \u548c INA219 \u901a\u4fe1\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E5%B1%8F%E5%B9%95%E5%8F%8A%E6%8C%89%E9%94%AE\"><\/span>\u5c4f\u5e55\u53ca\u6309\u952e<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><img src=\"https:\/\/xujiwei.com\/blog\/wp-content\/uploads\/2024\/02\/diy-usbmeter-oled-buttons.png\" alt=\"screen and buttons\" style=\"zoom: 50%;\" \/><\/p>\n<p>\u8fd9\u4e2a USB \u7535\u6d41\u8868\u4f7f\u7528\u7684 0.96 \u5bf8 12864 OLED \u5c4f\u5e55\u4f5c\u4e3a\u663e\u793a\u8bbe\u5907\uff0c\u4e3a\u4e86\u5236\u4f5c\u65b9\u4fbf\u76f4\u63a5\u7528\u7684\u6210\u54c1\u6a21\u5757\uff0c\u8fd9\u91cc\u53ea\u9700\u8981\u653e\u4e00\u4e2a 4 \u9488 2.54mm \u6392\u6bcd\u5c31\u53ef\u4ee5\u4e86\uff0c\u4e3a\u4e86\u5b9a\u4f4d\u5c4f\u5e55\u7684\u4f4d\u7f6e\uff0c\u989d\u5916\u653e\u4e86\u4e00\u4e2a 12864 \u5c4f\u5e55\u6a21\u5757\u7684\u7b26\u53f7\uff0c\u65b9\u4fbf\u5728 PCB \u8bbe\u8ba1\u7684\u65f6\u5019\u786e\u5b9a\u6392\u6bcd\u4f4d\u7f6e\u3002<\/p>\n<p>\u8fd9\u91cc\u53ea\u9700\u8981\u6839\u636e\u5c4f\u5e55\u6a21\u5757\u5f15\u811a\u987a\u5e8f\uff0c\u786e\u5b9a\u5230\u6392\u6bcd\u7684\u7f51\u7edc\u7b26\u53f7\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n<p>\u53e6\u5916\u8fd8\u6709\u4e24\u4e2a\u6309\u952e\uff0c\u7528\u4e8e\u64cd\u4f5c USB \u7535\u6d41\u8868\u7684\u5207\u6362\u9875\u9762\u4ee5\u53ca\u6570\u636e\u6e05\u96f6\uff0c\u8fd9\u91cc\u91c7\u7528\u4f4e\u7535\u5e73\u89e6\u53d1\u7684\u65b9\u5f0f\uff0c\u56e0\u6b64\u6bcf\u4e2a\u6309\u952e\u90fd\u4f7f\u7528\u4e86 10K \u4e0a\u62c9\u7535\u963b\u8fde\u63a5\u5230 3.3V\uff0c\u7136\u540e\u6309\u952e\u7684\u53e6\u4e00\u5bf9\u5f15\u811a\u8fde\u63a5\u5230 GND\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E4%B8%8B%E8%BD%BD%E5%8F%8A%E8%B0%83%E8%AF%95%E6%8E%A5%E5%8F%A3\"><\/span>\u4e0b\u8f7d\u53ca\u8c03\u8bd5\u63a5\u53e3<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><img src=\"https:\/\/xujiwei.com\/blog\/wp-content\/uploads\/2024\/02\/diy-usbmeter-uart.png\" alt=\"uart and download\" style=\"zoom:50%;\" \/><\/p>\n<p>\u8fd9\u91cc\u7684 UART \u63a5\u53e3\u7528\u6765\u8c03\u8bd5\u4f7f\u7528\uff0c\u65b9\u4fbf\u5728\u7f16\u5199\u4ee3\u7801\u65f6\u76f4\u63a5\u4f7f\u7528\u65e5\u5fd7\u6765\u8f93\u51fa\u5f53\u524d\u53d8\u91cf\u503c\uff0c\u8fd9\u91cc\u53ea\u4fdd\u7559\u4e86 TXD\u3001RXD\u3001GND\uff0c\u6ca1\u6709\u653e\u7f6e V3.3\uff0c\u56e0\u4e3a USB \u7535\u6d41\u8868\u5728\u4f7f\u7528\u65f6\u4e00\u822c\u80af\u5b9a\u4f1a\u6709\u5916\u90e8\u4f9b\u7535\u3002<\/p>\n<p>\u4e0b\u8f7d\u63a5\u53e3\u4f7f\u7528\u4e86 CH32V003 \u5b9a\u4e49\u7684 SWDIO \u548c NRST\uff0c\u4f7f\u7528 WCH Link-E \u7f16\u7a0b\u5668\u5373\u53ef\u5bf9 CH32V003 \u8fdb\u884c\u5237\u5199\u7a0b\u5e8f\uff0c\u548c UART \u63a5\u53e3\u4e00\u6837\uff0c\u5982\u679c\u5df2\u7ecf\u8fde\u63a5\u4e86\u5916\u90e8\u4f9b\u7535\uff0c\u5728\u8fde\u63a5\u7f16\u7a0b\u5668\u7684\u65f6\u5019\u4e5f\u53ef\u4ee5\u53ea\u8fde\u63a5 GND \u548c SWDIO\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E5%B0%8F%E7%BB%93\"><\/span>\u5c0f\u7ed3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u81f3\u6b64\u6211\u4eec\u5df2\u7ecf\u5b8c\u6210\u4e86\u8fd9\u4e2a USB \u7535\u6d41\u8868\u9879\u76ee\u7684\u6240\u6709\u539f\u7406\u56fe\u7ed8\u5236\uff0c\u5728\u7acb\u521b EDA \u4e2d\u4f7f\u7528 <strong>\u8bbe\u8ba1&gt;\u66f4\u65b0\/\u8f6c\u6362\u539f\u7406\u56fe\u5230PCB<\/strong> \u83dc\u5355\u5c31\u53ef\u4ee5\u5c06\u539f\u7406\u56fe\u66f4\u65b0\u5230 PCB \u7f16\u8f91\u5668\u4e2d\uff0c\u53ef\u4ee5\u5f00\u59cb\u5e03\u7ebf\u5566\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E9%A1%B9%E7%9B%AE%E5%BC%80%E6%BA%90%E5%9C%B0%E5%9D%80\"><\/span>\u9879\u76ee\u5f00\u6e90\u5730\u5740<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u672c\u9879\u76ee\u5df2\u7ecf\u5728\u7acb\u521b\u5f00\u6e90\u5e73\u53f0\u53d1\u5e03\uff0c\u53ef\u4ee5\u76f4\u63a5\u6253\u5f00\u4ee5\u4e0b\u5730\u5740\u67e5\u770b\u5e76\u4e14\u590d\u523b\u3002<\/p>\n<p><a href=\"https:\/\/oshwhub.com\/wandaeda\/ji-yu-ch32v003-de-usb-dian-liu-biao\">https:\/\/oshwhub.com\/wandaeda\/ji-yu-ch32v003-de-usb-dian-liu-biao<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>USB \u7535\u6d41\u8868\u5728\u7535\u5b50 DIY \u4e2d\u8fd8\u662f\u6bd4\u8f83\u5e38\u7528\u7684\uff0c\u53ef\u4ee5\u7528\u5b83\u6765\u89c2\u5bdf\u76ee\u6807\u8bbe\u5907\u7684\u5b9e\u65f6\u7535\u6d41 &hellip;<\/p>\n<p class=\"read-more\"><a href=\"https:\/\/xujiwei.com\/blog\/2024\/02\/diy-usb-meter-schematic\/\">\u7ee7\u7eed\u9605\u8bfb &raquo;<\/a><\/p>\n","protected":false},"author":2,"featured_media":1176,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[167,402],"tags":[359,169,329,372,373,371,370],"_links":{"self":[{"href":"https:\/\/xujiwei.com\/blog\/wp-json\/wp\/v2\/posts\/1165"}],"collection":[{"href":"https:\/\/xujiwei.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xujiwei.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xujiwei.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/xujiwei.com\/blog\/wp-json\/wp\/v2\/comments?post=1165"}],"version-history":[{"count":0,"href":"https:\/\/xujiwei.com\/blog\/wp-json\/wp\/v2\/posts\/1165\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/xujiwei.com\/blog\/wp-json\/wp\/v2\/media\/1176"}],"wp:attachment":[{"href":"https:\/\/xujiwei.com\/blog\/wp-json\/wp\/v2\/media?parent=1165"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xujiwei.com\/blog\/wp-json\/wp\/v2\/categories?post=1165"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xujiwei.com\/blog\/wp-json\/wp\/v2\/tags?post=1165"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}