{"id":37,"date":"2023-10-21T20:59:54","date_gmt":"2023-10-21T12:59:54","guid":{"rendered":"http:\/\/152.136.53.188\/?p=37"},"modified":"2023-11-06T06:16:14","modified_gmt":"2023-11-05T22:16:14","slug":"spi","status":"publish","type":"post","link":"https:\/\/www.xuzhe.tj.cn\/index.php\/2023\/10\/21\/spi\/","title":{"rendered":"\u4ec0\u4e48\u662fSPI\u901a\u8baf\uff1f"},"content":{"rendered":"\n<p>SPI\uff08Serial Peripheral Interface\uff0c\u4e32\u884c\u5916\u8bbe\u63a5\u53e3\uff09\u662f\u4e00\u79cd\u6570\u636e\u901a\u8baf\u534f\u8bae\uff0c\u5b83\u5c5e\u4e8e\u540c\u6b65\u4e32\u884c\u901a\u8baf\u534f\u8bae\uff0c\u5e76\u4e14\u662f\u5168\u53cc\u5de5\u901a\u4fe1\u65b9\u5f0f\u3002<\/p>\n\n\n<p>\u4e3b\u8981\u7528\u4e8e\u77ed\u8ddd\u79bb\u901a\u8baf\uff0c\u5c24\u5176\u662f\u5728\u5355\u4e2a\u4e3b\u8bbe\u5907\u548c\u591a\u4e2a\u4ece\u8bbe\u5907\u4e4b\u95f4\u3002\u7531\u4e8e\u5176\u7b80\u5355\u7684\u786c\u4ef6\u63a5\u53e3\u548c\u9ad8\u6570\u636e\u4f20\u8f93\u901f\u7387\uff0cSPI\u5728\u5404\u79cd\u5e94\u7528\u573a\u666f\u4e2d\u90fd\u6709\u5e7f\u6cdb\u7684\u7528\u9014\uff0c\u5305\u62ec\u4f46\u4e0d\u9650\u4e8e\u4f20\u611f\u5668\u6570\u636e\u8bfb\u53d6\u3001\u5b58\u50a8\u5668\u63a5\u53e3\u548c\u9762\u677f\u663e\u793a\u3002\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5c0f\u578b\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e0e\u7269\u8054\u7f51\u4e2d\u3002<\/p>\n\n<!--more-->\n\n<p>SPI\u4e0eRS-232\u3001RS-232\u3001RS-485\u30011-Wire\u3001I2C\u3001USB\u3001ThunderBolt\u4e00\u6837\u5c5e\u4e8e\u5916\u8bbe\u63a5\u53e3\u3002\u5176\u901a\u8baf\u901f\u7387\u53ea\u5c0f\u4e8eUSB\u3001ThunderBolt\u3002<\/p>\n\n\n<h2 class=\"wp-block-heading\">\u5de5\u4f5c\u539f\u7406<\/h2>\n\n\n<h3 class=\"wp-block-heading\">\u4e3b\u4ece\u6a21\u578b\uff08Master-Slave Model\uff09<\/h3>\n\n\n<p>\u5728SPI\u901a\u8baf\u7cfb\u7edf\u4e2d\uff0c\u4e3b\u4ece\u6a21\u578b\u662f\u4e00\u79cd\u6838\u5fc3\u7684\u7ec4\u7ec7\u7ed3\u6784\u3002\u7cfb\u7edf\u5185\u6709\u4e00\u4e2a\u4e3b\u8bbe\u5907\uff08Master\uff09\u548c\u4e00\u4e2a\u6216\u591a\u4e2a\u4ece\u8bbe\u5907\uff08Slave\uff09\u3002<\/p>\n\n\n<h3 class=\"wp-block-heading\">\u4e3b\u8bbe\u5907\uff08Master\uff09<\/h3>\n\n\n<p>\u4e3b\u8bbe\u5907\u8d1f\u8d23\u63a7\u5236\u6574\u4e2a\u901a\u8baf\u8fc7\u7a0b\u3002\u5b83\u751f\u6210\u65f6\u949f\u4fe1\u53f7\uff08SCLK\uff09\uff0c\u5e76\u901a\u8fc7\u7247\u9009\uff08Chip Select, CS\uff09\u7ebf\u6765\u9009\u62e9\u4e0e\u54ea\u4e00\u4e2a\u4ece\u8bbe\u5907\u8fdb\u884c\u901a\u8baf\u3002\u4e3b\u8bbe\u5907\u4e5f\u662f\u6570\u636e\u4f20\u8f93\u7684\u53d1\u8d77\u8005\uff0c\u5b83\u53d1\u9001\u547d\u4ee4\u5e76\u8bf7\u6c42\u4ece\u8bbe\u5907\u7684\u6570\u636e\u3002\u4e3b\u8bbe\u5907\u51b3\u5b9aSPI\u901a\u8baf\u7684\u901f\u7387\u3002<\/p>\n\n\n<h3 class=\"wp-block-heading\">\u4ece\u8bbe\u5907\uff08Slave\uff09<\/h3>\n\n\n<p>\u4ece\u8bbe\u5907\u5219\u662f\u88ab\u63a7\u5236\u7684\u8bbe\u5907\uff0c\u53ea\u6709\u5728\u4e3b\u8bbe\u5907\u7684\u6388\u6743\u4e0b\u624d\u4f1a\u8fdb\u884c\u6570\u636e\u4f20\u8f93\u3002\u4ece\u8bbe\u5907\u4e0d\u80fd\u81ea\u5df1\u751f\u6210\u65f6\u949f\u4fe1\u53f7\uff0c\u4e5f\u4e0d\u80fd\u521d\u59cb\u5316\u4e0e\u5176\u4ed6\u8bbe\u5907\u7684\u901a\u8baf\u3002<\/p>\n\n\n<h3 class=\"wp-block-heading\">\u4e3b\u8bbe\u5907\u4e0e\u4ece\u8bbe\u5907\u7684\u8fde\u63a5<\/h3>\n\n\n<ol class=\"wp-block-list\">\n    <li>\u5355\u4e3b\u8bbe\u5907\u5bf9\u5355\u4e00\u4ece\u8bbe\u5907<br><\/li>\n<\/ol>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"700\" height=\"219\" src=\"http:\/\/152.136.53.188\/wp-content\/uploads\/2023\/10\/SPI_single_slave.svg_.png\" alt=\"SPI\\_single\\_slave.svg.png\" class=\"wp-image-84\" srcset=\"https:\/\/www.xuzhe.tj.cn\/wp-content\/uploads\/2023\/10\/SPI_single_slave.svg_.png 700w, https:\/\/www.xuzhe.tj.cn\/wp-content\/uploads\/2023\/10\/SPI_single_slave.svg_-300x94.png 300w, https:\/\/www.xuzhe.tj.cn\/wp-content\/uploads\/2023\/10\/SPI_single_slave.svg_-624x195.png 624w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><figcaption>SPI_single_slave.svg.png<\/figcaption><\/figure><\/div>\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n    <li>\u5355\u4e3b\u8bbe\u5907\u5bf9\u591a\u4e2a\u4ece\u8bbe\u5907<br><\/li>\n<\/ol>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"476\" src=\"http:\/\/152.136.53.188\/wp-content\/uploads\/2023\/10\/600px-SPI_three_slaves.svg_.png\" alt=\"600px-SPI\\_three\\_slaves.svg.png\" class=\"wp-image-86\" srcset=\"https:\/\/www.xuzhe.tj.cn\/wp-content\/uploads\/2023\/10\/600px-SPI_three_slaves.svg_.png 600w, https:\/\/www.xuzhe.tj.cn\/wp-content\/uploads\/2023\/10\/600px-SPI_three_slaves.svg_-300x238.png 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><figcaption>600px-SPI_three_slaves.svg.png<\/figcaption><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\">\u4e3e\u4f8b\u8bf4\u660e<\/h3>\n\n\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u7b80\u5355\u7684\u5d4c\u5165\u5f0f\u7cfb\u7edf\uff0c\u5176\u4e2d\u5305\u62ec\u4e00\u4e2a\u5fae\u63a7\u5236\u5668\uff08\u4f5c\u4e3a\u4e3b\u8bbe\u5907\uff09\u548c\u51e0\u4e2a\u4f20\u611f\u5668\uff08\u5982\u6e29\u5ea6\u4f20\u611f\u5668\u3001\u6e7f\u5ea6\u4f20\u611f\u5668\u7b49\uff0c\u4f5c\u4e3a\u4ece\u8bbe\u5907\uff09\u3002<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"1088\" height=\"938\" src=\"http:\/\/152.136.53.188\/wp-content\/uploads\/2023\/10\/mermaid-diagram-2023-10-21-204139.png\" alt=\"mermaid-diagram-2023-10-21-204139.png\" class=\"wp-image-36\" srcset=\"https:\/\/www.xuzhe.tj.cn\/wp-content\/uploads\/2023\/10\/mermaid-diagram-2023-10-21-204139.png 1088w, https:\/\/www.xuzhe.tj.cn\/wp-content\/uploads\/2023\/10\/mermaid-diagram-2023-10-21-204139-300x259.png 300w, https:\/\/www.xuzhe.tj.cn\/wp-content\/uploads\/2023\/10\/mermaid-diagram-2023-10-21-204139-1024x883.png 1024w, https:\/\/www.xuzhe.tj.cn\/wp-content\/uploads\/2023\/10\/mermaid-diagram-2023-10-21-204139-768x662.png 768w\" sizes=\"auto, (max-width: 1088px) 100vw, 1088px\" \/><figcaption>mermaid-diagram-2023-10-21-204139.png<\/figcaption><\/figure><\/div>\n\n\n<ul class=\"wp-block-list\">\n    <li><strong>\u521d\u59cb\u5316\u9636\u6bb5<\/strong>: \u5fae\u63a7\u5236\u5668\u901a\u8fc7\u7247\u9009\uff08CS\uff09\u7ebf\u9009\u62e9\u60f3\u8981\u901a\u8baf\u7684\u4f20\u611f\u5668\u3002\u6bd4\u5982\uff0c\u5982\u679c\u5fae\u63a7\u5236\u5668\u60f3\u8981\u8bfb\u53d6\u6e29\u5ea6\u6570\u636e\uff0c\u5b83\u4f1a\u901a\u8fc7\u62c9\u4f4e\u4e0e\u6e29\u5ea6\u4f20\u611f\u5668\u76f8\u8fde\u7684CS\u7ebf\u6765\u9009\u62e9\u8fd9\u4e2a\u4f20\u611f\u5668\u3002<\/li>\n    <li><strong>\u6570\u636e\u8bf7\u6c42<\/strong>: \u7136\u540e\uff0c\u5fae\u63a7\u5236\u5668\u5728MOSI\uff08Master Out Slave In\uff09\u7ebf\u4e0a\u53d1\u9001\u4e00\u4e2a\u8bf7\u6c42\u6e29\u5ea6\u6570\u636e\u7684\u547d\u4ee4\u3002<\/li>\n    <li><strong>\u6570\u636e\u63a5\u6536<\/strong>: \u6e29\u5ea6\u4f20\u611f\u5668\u63a5\u6536\u5230\u547d\u4ee4\u540e\uff0c\u5728MISO\uff08Master In Slave Out\uff09\u7ebf\u4e0a\u53d1\u9001\u76f8\u5e94\u7684\u6e29\u5ea6\u6570\u636e\u56de\u5fae\u63a7\u5236\u5668\u3002<\/li>\n    <li><strong>\u7ed3\u675f\u901a\u8baf<\/strong>: \u6570\u636e\u4f20\u8f93\u5b8c\u6210\u540e\uff0c\u5fae\u63a7\u5236\u5668\u4f1a\u901a\u8fc7\u5c06CS\u7ebf\u62c9\u9ad8\u6765\u7ed3\u675f\u4e0e\u8be5\u4f20\u611f\u5668\u7684\u901a\u8baf\u3002<br><\/li>\n<\/ul>\n\n\n<p>\u8fd9\u6837\uff0c\u901a\u8fc7\u4e3b\u4ece\u6a21\u578b\uff0c\u5fae\u63a7\u5236\u5668\uff08\u4e3b\u8bbe\u5907\uff09\u80fd\u591f\u6709\u6548\u5730\u63a7\u5236\u4e0e\u591a\u4e2a\u4f20\u611f\u5668\uff08\u4ece\u8bbe\u5907\uff09\u4e4b\u95f4\u7684\u6570\u636e\u4ea4\u6362\uff0c\u786e\u4fdd\u7cfb\u7edf\u7684\u9ad8\u6548\u548c\u6709\u5e8f\u8fd0\u884c\u3002<\/p>\n\n\n<h3 class=\"wp-block-heading\">\u56db\u6839\u7ebf<\/h3>\n\n\n<p>SPI\u901a\u5e38\u9700\u8981\u7528\u5230\u56db\u6839\u7ebf\uff1a<\/p>\n\n\n<ol class=\"wp-block-list\">\n    <li><strong>MISO\uff08Master In Slave Out\uff09<\/strong>: \u7528\u4e8e\u4ece\u8bbe\u5907\u5230\u4e3b\u8bbe\u5907\u7684\u6570\u636e\u4f20\u8f93\u3002<\/li>\n    <li><strong>MOSI\uff08Master Out Slave In\uff09<\/strong>: \u7528\u4e8e\u4ece\u4e3b\u8bbe\u5907\u5230\u4ece\u8bbe\u5907\u7684\u6570\u636e\u4f20\u8f93\u3002<\/li>\n    <li><strong>SCLK\uff08Serial Clock\uff09<\/strong>: \u7531\u4e3b\u8bbe\u5907\u751f\u6210\u7684\u65f6\u949f\u4fe1\u53f7\u3002<\/li>\n    <li><strong>CS\uff08Chip Select\uff09<\/strong>: \u7528\u4e8e\u9009\u62e9\u7279\u5b9a\u7684\u4ece\u8bbe\u5907\u8fdb\u884c\u901a\u4fe1\u3002<br><\/li>\n<\/ol>\n\n\n<h3 class=\"wp-block-heading\">\u6570\u636e\u4f20\u8f93<\/h3>\n\n\n<p>\u6570\u636e\u4f20\u8f93\u901a\u5e38\u4ee5\u5e27\u4e3a\u5355\u4f4d\u8fdb\u884c\u3002\u5728\u6bcf\u4e00\u4e2a\u65f6\u949f\u5468\u671f\u4e2d\uff0c\u4e3b\u8bbe\u5907\u548c\u4ece\u8bbe\u5907\u5206\u522b\u5728MOSI\u548cMISO\u7ebf\u4e0a\u53d1\u9001\u548c\u63a5\u6536\u4e00\u4e2a\u6570\u636e\u4f4d\u3002<\/p>\n\n\n<p>\u5728\u6bcf\u4e2aSPI\u65f6\u949f\u5468\u671f\u5185\uff0c\u90fd\u4f1a\u53d1\u751f\u5168\u53cc\u5de5\u6570\u636e\u4f20\u8f93\u3002\u4e3b\u8bbe\u5907\u5728MOSI\u7ebf\u4e0a\u53d1\u9001\u4e00\u4e2a\u4f4d\uff0c\u4ece\u8bbe\u5907\u8bfb\u53d6\u5b83\uff0c\u540c\u65f6\u4ece\u673a\u5728MISO\u7ebf\u4e0a\u53d1\u9001\u4e00\u4f4d\u6570\u636e\uff0c\u4e3b\u673a\u8bfb\u53d6\u5b83\u3002\u5373\u4f7f\u53ea\u6709\u5355\u5411\u6570\u636e\u4f20\u8f93\u7684\u76ee\u7684\uff0c\u4e3b\u4ece\u673a\u4e4b\u95f4\u7684\u901a\u4fe1\u5de5\u4f5c\u65b9\u5f0f\u4ecd\u7136\u662f\u53cc\u5de5\u7684\u3002<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"320\" src=\"http:\/\/152.136.53.188\/wp-content\/uploads\/2023\/10\/SPI_8-bit_circular_transfer.svg_.png\" alt=\"SPI\\_8-bit\\_circular\\_transfer.svg.png\" class=\"wp-image-85\" srcset=\"https:\/\/www.xuzhe.tj.cn\/wp-content\/uploads\/2023\/10\/SPI_8-bit_circular_transfer.svg_.png 800w, https:\/\/www.xuzhe.tj.cn\/wp-content\/uploads\/2023\/10\/SPI_8-bit_circular_transfer.svg_-300x120.png 300w, https:\/\/www.xuzhe.tj.cn\/wp-content\/uploads\/2023\/10\/SPI_8-bit_circular_transfer.svg_-768x307.png 768w, https:\/\/www.xuzhe.tj.cn\/wp-content\/uploads\/2023\/10\/SPI_8-bit_circular_transfer.svg_-624x250.png 624w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption>SPI_8-bit_circular_transfer.svg.png<\/figcaption><\/figure><\/div>\n\n\n<p>\u56fe\uff1a\u4e24\u4e2a\u8fde\u63a5\u6210\u865a\u62df\u73af\u5f62\u7f13\u51b2\u5668\u7684\u79fb\u4f4d\u5bc4\u5b58\u5668<\/p>\n\n\n<p>\u4f20\u8f93\u901a\u5e38\u4f1a\u4f7f\u7528\u7ed9\u5b9a\u5b57\u957f\u7684\u4e24\u4e2a\u79fb\u4f4d\u5bc4\u5b58\u5668\uff0c\u4e00\u4e2a\u5728\u4e3b\u8bbe\u5907\u4e2d\uff0c\u4e00\u4e2a\u5728\u4ece\u8bbe\u5907\u4e2d\uff0c\u8fd9\u4e24\u4e2a\u5bc4\u5b58\u5668\u8fde\u63a5\u6210\u4e00\u4e2a\u865a\u62df\u7684\u73af\u5f62\u7f13\u51b2\u5668\u3002\u6570\u636e\u901a\u5e38\u5148\u4ece\u6700\u9ad8\u4f4d\u79fb\u51fa\u3002\u5728\u65f6\u949f\u8baf\u53f7\u8fb9\u6cbf\uff0c\u4e3b\u673a\u548c\u4ece\u673a\u5747\u79fb\u51fa\u4e00\u4f4d\uff0c\u7136\u540e\u5728\u4f20\u8f93\u7ebf\u4e0a\u8f93\u51fa\u7ed9\u5bf9\u65b9\u3002\u5728\u4e0b\u4e00\u4e2a\u65f6\u949f\u6cbf\uff0c\u6bcf\u4e2a\u63a5\u6536\u5668\u90fd\u4ece\u4f20\u8f93\u7ebf\u63a5\u53d7\u5bf9\u65b9\u53d1\u51fa\u7684\u6570\u636e\u4f4d\uff0c\u5e76\u4e14\u4ece\u79fb\u4f4d\u5bc4\u5b58\u5668\u7684\u6700\u4f4e\u4f4d\u63a8\u5165\u3002\u6bcf\u5b8c\u6210\u8fd9\u6837\u4e00\u4e2a\u79fb\u51fa\u2014\u2014\u63a8\u5165\u7684\u5468\u671f\u540e\uff0c\u4e3b\u673a\u548c\u4ece\u673a\u5c31\u4ea4\u6362\u5bc4\u5b58\u5668\u4e2d\u7684\u4e00\u4f4d\u6570\u636e\u3002\u5f53\u6240\u6709\u6570\u636e\u4f4d\u90fd\u7ecf\u8fc7\u4e86\u8fd9\u6837\u7684\u79fb\u51fa\u2014\u2014\u63a8\u5165\u8fc7\u7a0b\u540e\uff0c\u4e3b\u673a\u548c\u4ece\u673a\u5c31\u5b8c\u6210\u4e86\u5bc4\u5b58\u5668\u4e0a\u7684\u6570\u636e\u4ea4\u6362\u3002<\/p>\n\n\n<h3 class=\"wp-block-heading\">\u5168\u53cc\u5de5\u901a\u4fe1<\/h3>\n\n\n<p>\u7531\u4e8eMISO\u548cMOSI\u7ebf\u540c\u65f6\u7528\u4e8e\u6570\u636e\u4f20\u8f93\uff0cSPI\u652f\u6301\u5168\u53cc\u5de5\u901a\u4fe1\uff0c\u5373\u5728\u540c\u4e00\u65f6\u95f4\uff0c\u6570\u636e\u53ef\u4ee5\u540c\u65f6\u5728\u4e24\u4e2a\u65b9\u5411\u4e0a\u6d41\u52a8\u3002<\/p>\n\n\n<p>\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0cSPI\u5b9e\u73b0\u4e86\u4e00\u79cd\u5feb\u901f\u3001\u9ad8\u6548\u4e14\u7075\u6d3b\u7684\u6570\u636e\u4f20\u8f93\u673a\u5236\u3002\u5b83\u4e0d\u4ec5\u7528\u4e8e\u8fde\u63a5\u5404\u79cd\u5404\u6837\u7684\u5916\u8bbe\uff0c\u8fd8\u7ecf\u5e38\u7528\u4f5c\u4e0d\u540c\u5d4c\u5165\u5f0f\u7ec4\u4ef6\u4e4b\u95f4\u7684\u901a\u4fe1\u6865\u6881\u3002<\/p>\n\n\n<h3 class=\"wp-block-heading\">SPI\u7684\u6a21\u5f0f(MODE)<\/h3>\n\n\n<p>SPI \u6709\u56db\u79cd\u6a21\u5f0f\uff0c\u5206\u522b\u7531\u4e24\u4e2a\u5c5e\u6027\u51b3\u5b9a\uff1a\u65f6\u949f\u6781\u6027 (CPOL) \u548c\u65f6\u949f\u76f8\u4f4d (CPHA)\u3002<\/p>\n\n\n<p><strong>1<\/strong> <strong>CPOL (Clock Polarity)<\/strong>: \u65f6\u949f\u6781\u6027\u51b3\u5b9a\u4e86\u7a7a\u95f2\u65f6\u523b\u7684\u65f6\u949f\u4fe1\u53f7\u7535\u5e73\u3002<\/p>\n\n\n<ul class=\"wp-block-list\">\n    <li>CPOL = 0: \u65f6\u949f\u7ebf\u5728\u7a7a\u95f2\u65f6\u4e3a\u4f4e\u7535\u5e73\u3002<\/li>\n    <li>CPOL = 1: \u65f6\u949f\u7ebf\u5728\u7a7a\u95f2\u65f6\u4e3a\u9ad8\u7535\u5e73\u3002<br><\/li>\n<\/ul>\n\n\n<p><strong>2<\/strong> <strong>CPHA (Clock Phase)<\/strong>: \u65f6\u949f\u76f8\u4f4d\u51b3\u5b9a\u4e86\u6570\u636e\u5728\u65f6\u949f\u7684\u54ea\u4e2a\u8fb9\u6cbf\u4e0a\u88ab\u91c7\u6837\u3002<\/p>\n\n\n<ul class=\"wp-block-list\">\n    <li>CPHA = 0: \u6570\u636e\u5728\u7b2c\u4e00\u4e2a\uff08\u524d\u6cbf\uff09\u8fb9\u6cbf\u4e0a\u88ab\u91c7\u6837\u3002<\/li>\n    <li>CPHA = 1: \u6570\u636e\u5728\u7b2c\u4e8c\u4e2a\uff08\u540e\u6cbf\uff09\u8fb9\u6cbf\u4e0a\u88ab\u91c7\u6837\u3002<br><\/li>\n<\/ul>\n\n\n<p>\u2800\u7ed3\u5408\u4e0a\u8ff0\u5c5e\u6027\uff0c\u6211\u4eec\u53ef\u4ee5\u5f97\u5230\u56db\u79cd\u4e0d\u540c\u7684\u6a21\u5f0f\uff1a<\/p>\n\n\n<ul class=\"wp-block-list\">\n    <li><strong>Mode 0 (0,0)<\/strong> &#8211; CPOL = 0<\/li>\n    <li>CPHA = 0<\/li>\n    <li>\u6570\u636e\u5728\u65f6\u949f\u7684\u4e0a\u5347\u6cbf\u88ab\u91c7\u6837\uff0c\u6570\u636e\u5728\u4e0b\u5347\u6cbf\u6539\u53d8\u3002<\/li>\n    <li><strong>Mode 1 (0,1)<\/strong> &#8211; CPOL = 0<\/li>\n    <li>CPHA = 1<\/li>\n    <li>\u6570\u636e\u5728\u65f6\u949f\u7684\u4e0b\u964d\u6cbf\u88ab\u91c7\u6837\uff0c\u6570\u636e\u5728\u4e0a\u5347\u6cbf\u6539\u53d8\u3002<\/li>\n    <li><strong>Mode 2 (1,0)<\/strong> &#8211; CPOL = 1<\/li>\n    <li>CPHA = 0<\/li>\n    <li>\u6570\u636e\u5728\u65f6\u949f\u7684\u4e0b\u964d\u6cbf\u88ab\u91c7\u6837\uff0c\u6570\u636e\u5728\u4e0a\u5347\u6cbf\u6539\u53d8\u3002<\/li>\n    <li><strong>Mode 3 (1,1)<\/strong> &#8211; CPOL = 1<\/li>\n    <li>CPHA = 1<\/li>\n    <li>\u6570\u636e\u5728\u65f6\u949f\u7684\u4e0a\u5347\u6cbf\u88ab\u91c7\u6837\uff0c\u6570\u636e\u5728\u4e0b\u964d\u6cbf\u6539\u53d8\u3002<br><\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"348\" height=\"223\" src=\"http:\/\/152.136.53.188\/wp-content\/uploads\/2023\/10\/spi-modes.png\" alt=\"spi-modes.png\" class=\"wp-image-35\" srcset=\"https:\/\/www.xuzhe.tj.cn\/wp-content\/uploads\/2023\/10\/spi-modes.png 348w, https:\/\/www.xuzhe.tj.cn\/wp-content\/uploads\/2023\/10\/spi-modes-300x192.png 300w\" sizes=\"auto, (max-width: 348px) 100vw, 348px\" \/><figcaption>spi-modes.png<\/figcaption><\/figure><\/div>\n\n\n<p>\u867d\u7136mode0\u4e0emode3\u90fd\u662f\u5728\u4e0a\u5347\u6cbf\u68c0\u6d4b\u3001mode1\u4e0emode2\u90fd\u662f\u5728\u4e0b\u964d\u6cbf\u68c0\u6d4b\u3002\u4f46\u662f\u5176\u5728\u7a7a\u95f2\u65f6\u7684\u7535\u5e73\u9ad8\u4f4e\u662f\u6709\u533a\u522b\u7684\u3002<\/p>\n\n\n<p>\u9009\u62e9\u5408\u9002\u7684\u6a21\u5f0f\u901a\u5e38\u53d6\u51b3\u4e8e\u5916\u56f4\u8bbe\u5907\u7684\u8981\u6c42\u3002\u5728\u8bbe\u8ba1\u7cfb\u7edf\u65f6\uff0c\u5fc5\u987b\u786e\u4fdd\u4e3b\u8bbe\u5907\u548c\u4ece\u8bbe\u5907\u5728\u540c\u4e00\u6a21\u5f0f\u4e0b\u5de5\u4f5c\uff0c\u4ee5\u786e\u4fdd\u6570\u636e\u7684\u6b63\u786e\u4f20\u8f93\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>SPI\uff08Serial Peripheral Interface\uff0c\u4e32\u884c\u5916\u8bbe\u63a5\u53e3\uff09\u662f\u4e00\u79cd\u6570\u636e\u901a\u8baf\u534f\u8bae\uff0c\u5b83\u5c5e\u4e8e\u540c\u6b65\u4e32\u884c\u901a\u8baf\u534f\u8bae\u3002\u4e3b\u8981\u7528\u4e8e\u77ed\u8ddd\u79bb\u901a\u8baf\uff0c\u5c24\u5176\u662f\u5728\u5355\u4e2a\u4e3b\u8bbe\u5907\u548c\u591a\u4e2a\u4ece\u8bbe\u5907\u4e4b\u95f4\u3002\u7531\u4e8e\u5176\u7b80\u5355\u7684\u786c\u4ef6\u63a5\u53e3\u548c\u9ad8\u6570\u636e\u4f20\u8f93\u901f\u7387\uff0cSPI\u5728\u5404\u79cd\u5e94\u7528\u573a\u666f\u4e2d\u90fd\u6709\u5e7f\u6cdb\u7684\u7528\u9014\uff0c\u5305\u62ec\u4f46\u4e0d\u9650\u4e8e\u4f20\u611f\u5668\u6570\u636e\u8bfb\u53d6\u3001\u5b58\u50a8\u5668\u63a5\u53e3\u548c\u9762\u677f\u663e\u793a\u3002\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5c0f\u578b\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e0e\u7269\u8054\u7f51\u4e2d\u3002<\/p>\n","protected":false},"author":1,"featured_media":87,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[12],"class_list":["post-37","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-10","tag-spi"],"_links":{"self":[{"href":"https:\/\/www.xuzhe.tj.cn\/index.php\/wp-json\/wp\/v2\/posts\/37","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xuzhe.tj.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xuzhe.tj.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xuzhe.tj.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xuzhe.tj.cn\/index.php\/wp-json\/wp\/v2\/comments?post=37"}],"version-history":[{"count":14,"href":"https:\/\/www.xuzhe.tj.cn\/index.php\/wp-json\/wp\/v2\/posts\/37\/revisions"}],"predecessor-version":[{"id":151,"href":"https:\/\/www.xuzhe.tj.cn\/index.php\/wp-json\/wp\/v2\/posts\/37\/revisions\/151"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.xuzhe.tj.cn\/index.php\/wp-json\/wp\/v2\/media\/87"}],"wp:attachment":[{"href":"https:\/\/www.xuzhe.tj.cn\/index.php\/wp-json\/wp\/v2\/media?parent=37"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xuzhe.tj.cn\/index.php\/wp-json\/wp\/v2\/categories?post=37"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xuzhe.tj.cn\/index.php\/wp-json\/wp\/v2\/tags?post=37"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}