{"id":995,"date":"2024-09-24T14:55:39","date_gmt":"2024-09-24T06:55:39","guid":{"rendered":"https:\/\/aoofoo.com\/?p=995"},"modified":"2024-09-24T17:13:10","modified_gmt":"2024-09-24T09:13:10","slug":"2-35-spi%e9%80%9a%e4%bf%a1%e5%8d%8f%e8%ae%ae","status":"publish","type":"post","link":"https:\/\/aoofoo.com\/index.php\/2024\/09\/24\/2-35-spi%e9%80%9a%e4%bf%a1%e5%8d%8f%e8%ae%ae\/","title":{"rendered":"2.35 SPI\u901a\u4fe1\u534f\u8bae"},"content":{"rendered":"<h2>SPI\u901a\u4fe1\u7b80\u4ecb<\/h2>\n<p>SPI\uff08Serial Peripheral Interface\uff09\u662f\u7531Motorola\u516c\u53f8\u5f00\u53d1\u7684\u4e00\u79cd\u901a\u7528\u6570\u636e\u603b\u7ebf\u3002<\/p>\n<p>\u56db\u6839\u901a\u4fe1\u7ebf\uff1aSCK\u3001MOSI\u3001MISO\u3001SS\u3002<\/p>\n<p>SCK\uff08Serial Clock\uff09\u3001MOSI\uff08Master Output Slave Input\uff09\u3001MISO\uff08Master Input Slave Output\uff09\u3001SS\uff08Slave Select\uff09\u3002<\/p>\n<p>SCK\u53c8\u79f0SCLK\u3001CLK\u3001CK\u3002MOSI\u548cMISO\u53c8\u79f0DO\u548cDI\u3002SS\uff08\u7247\u9009\uff09\u53c8\u79f0NSS\u3001CS\u3002<\/p>\n<p>\u540c\u6b65\uff0c\u5168\u53cc\u5de5 \u3002\u540c\u6b65\u65f6\u5e8f\u80af\u5b9a\u5c31\u6709\u65f6\u949f\u7ebf\uff0c\u6240\u4ee5SCK\u8fd9\u4e2a\u5f15\u811a\u662f\u6765\u63d0\u4f9b\u65f6\u949f\u4fe1\u53f7\u7684\uff0c\u6570\u636e\u4f4d\u7684\u8f93\u51fa\u548c\u8f93\u5165\u90fd\u662f\u5728SCK\u7684\u4e0a\u5347\u6cbf\u6216\u4e0b\u964d\u6cbf\u8fdb\u884c\u7684\u3002 \u5168\u53cc\u5de5\u662f\u6307\u6570\u636e\u53d1\u9001\u548c\u6570\u636e\u63a5\u6536\u5355\u72ec\u5404\u5360\u4e00\u6761\u7ebf\uff0c\u53d1\u9001\u7528\u53d1\u9001\u7684\u7ebf\u8def\uff0c\u63a5\u6536\u7528\u63a5\u6536\u7684\u7ebf\u8def\uff0c\u4e24\u8005\u4e92\u4e0d\u5f71\u54cd\u3002<\/p>\n<p>MOSI\u7ebf\uff1a\u4e3b\u673a\u8f93\u51fa\uff0c\u4ece\u673a\u8f93\u5165\u3002\u5982\u679c\u4e3b\u673a\u63a5\u5728\u8fd9\u6761\u7ebf\u4e0a\uff0c\u5c31\u662fMO\uff0c\u4e3b\u673a\u8f93\u51fa\u3002\u5982\u679c\u662f\u4ece\u673a\u63a5\u5728\u8fd9\u6761\u7ebf\u4e0a\uff0c\u5c31\u662fSI\uff0c\u4ece\u673a\u8f93\u5165\u3002<\/p>\n<p>MISO\u7ebf\uff1a\u4e3b\u673a\u8f93\u5165\uff0c\u4ece\u673a\u63a5\u6536\u3002\u5982\u679c\u4e3b\u673a\u63a5\u5728\u8fd9\u6761\u7ebf\u4e0a\uff0c\u5c31\u662fMI\uff0c\u4e3b\u673a\u8f93\u51fa\u3002\u5982\u679c\u662f\u4ece\u673a\u63a5\u5728\u8fd9\u6761\u7ebf\u4e0a\uff0c\u5c31\u662fSO\uff0c\u4ece\u673a\u8f93\u5165\u3002<\/p>\n<p>SS\u7ebf\uff1a\u4ece\u673a\u9009\u62e9\u7ebf\uff0c\u6709\u51e0\u4e2a\u4ece\u673a\u5c31\u5f00\u51e0\u6761SS\u7ebf\uff0c\u6240\u6709\u4ece\u673a\uff0c\u4e00\u4eba\u4e00\u6839\u3002<\/p>\n<p>\u603b\u7ebf\u6302\u8f7d\u591a\u8bbe\u5907\uff08\u4e00\u4e3b\u591a\u4ece\uff09\u3002<\/p>\n<p>SPI\u6ca1\u6709\u5e94\u7b54\u673a\u5236\u7684\u8bbe\u8ba1\uff0c\u53d1\u9001\u6570\u636e\u5c31\u53d1\u9001\uff0c\u63a5\u6536\u6570\u636e\u5c31\u63a5\u6536\uff0c\u81f3\u4e8e\u5bf9\u9762\u662f\u4e0d\u662f\u5b58\u5728\uff0cSPI\u662f\u4e0d\u7ba1\u7684\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-997\" src=\"https:\/\/aoofoo.com\/wp-content\/uploads\/2024\/09\/1-40.png\" alt=\"\" width=\"938\" height=\"209\" \/><\/p>\n<h2>SPI\u786c\u4ef6\u7535\u8def<\/h2>\n<p>\u6240\u6709SPI\u8bbe\u5907\u7684SCK\u3001MOSI\u3001MISO\u5206\u522b\u8fde\u5728\u4e00\u8d77\u3002<\/p>\n<p>\u4e3b\u673a\u53e6\u5916\u5f15\u51fa\u591a\u6761SS\u63a7\u5236\u7ebf\uff0c\u5206\u522b\u63a5\u5230\u5404\u4ece\u673a\u7684SS\u5f15\u811a\u3002<\/p>\n<p>\u8f93\u51fa\u5f15\u811a\u914d\u7f6e\u4e3a\u63a8\u633d\u8f93\u51fa\uff0c\u8f93\u5165\u5f15\u811a\u914d\u7f6e\u4e3a\u6d6e\u7a7a\u6216\u4e0a\u62c9\u8f93\u5165\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1000\" src=\"https:\/\/aoofoo.com\/wp-content\/uploads\/2024\/09\/1-41.png\" alt=\"\" width=\"538\" height=\"321\" \/><\/p>\n<p>\u4e3b\u673a\u7684SS\u7ebf\u90fd\u662f\u8f93\u51fa\uff0c\u4ece\u673a\u7684SS\u7ebf\u90fd\u662f\u8f93\u5165\u3002SS\u7ebf\u662f\u4f4e\u7535\u5e73\u6709\u6548\uff0c\u4e3b\u673a\u60f3\u6307\u5b9a\u8c01\uff0c\u5c31\u628a\u5bf9\u5e94\u7684SS\u8f93\u51fa\u7ebf\u7f6e\u4f4e\u7535\u5e73\u6709\u6548\u5c31\u884c\u4e86\u3002<\/p>\n<h2>\u79fb\u4f4d\u793a\u610f\u56fe<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1002\" src=\"https:\/\/aoofoo.com\/wp-content\/uploads\/2024\/09\/1-42.png\" alt=\"\" width=\"834\" height=\"384\" \/><\/p>\n<p>\u6211\u4eec\u770b\u56fe\u53ef\u4ee5\u77e5\u9053\uff0cSPI\u7684\u4e3b\u673a\u548c\u4ece\u673a\u7684\u79fb\u4f4d\u5bc4\u5b58\u5668\u90fd\u6709\u4e00\u4e2a<strong><span style=\"color: #ff9900;\">\u65f6\u949f\u8f93\u5165\u7aef<\/span><\/strong>\u3002<\/p>\n<p>SPI\u4e00\u822c\u662f<strong><span style=\"color: #ff9900;\">\u9ad8\u4f4d\u5148\u884c<\/span><\/strong>\uff0c\u6bcf\u6765\u4e00\u4e2a\u65f6\u949f\uff0c\u79fb\u4f4d\u5bc4\u5b58\u5668\u5c31\u4f1a<span style=\"color: #ff9900;\"><strong>\u5411\u5de6\u79fb\u52a8<\/strong><\/span>\u3002<\/p>\n<p>\u79fb\u4f4d\u5668\u7684\u65f6\u949f\u6e90\uff0c\u662f\u7531\u4e3b\u673a\u63d0\u4f9b\u7684\uff0c\u8fd9\u91cc\u53eb\u505a<strong><span style=\"color: #ff9900;\">\u6ce2\u7279\u7387\u53d1\u751f\u5668<\/span><\/strong>\u3002\u5b83\u4ea7\u751f\u7684\u65f6\u949f\u9a71\u52a8\u4e3b\u673a\u7684\u79fb\u4f4d\u5bc4\u5b58\u5668\u8fdb\u884c\u79fb\u4f4d\uff0c\u540c\u65f6\uff0c\u8fd9\u4e2a\u65f6\u949f\u4e5f\u901a\u8fc7SCK\u5f15\u811a\u8fdb\u884c\u8f93\u51fa\uff0c\u63a5\u5230\u4ece\u673a\u7684\u79fb\u4f4d\u5bc4\u5b58\u5668\u91cc\u00a0 \u3002<\/p>\n<p>\u8fd9\u4e24\u4e2a\u79fb\u4f4d\u5bc4\u5b58\u5668\u5c31\u53ef\u4ee5\u5b9e\u73b0\u4e3b\u673a\u548c\u4ece\u673a\u7684\u4e00\u4e2a\u5b57\u8282\u7684\u6570\u636e\u4ea4\u6362\uff0cSPI\u8fd0\u884c\u7684\u8fc7\u7a0b\u8fd9\u6837\uff0cSPI\u7684\u6570\u636e\u6536\u53d1\uff0c\u90fd\u662f\u57fa\u4e8e\u5b57\u8282\u4ea4\u6362\u8fd9\u4e2a\u57fa\u672c\u5355\u5143\u6765\u8fdb\u884c\u7684\uff0c\u5f53\u4e3b\u673a\u9700\u8981\u53d1\u9001\u4e00\u4e2a\u5b57\u8282\uff0c\u5e76\u4e14\u540c\u65f6\u9700\u8981\u63a5\u6536\u4e00\u4e2a\u548c\u5b57\u8282\u65f6\uff0c\u5c31\u53ef\u4ee5\u6267\u884c\u5b57\u8282\u4ea4\u6362\u7684\u65f6\u5e8f\u3002<\/p>\n<p>\u90a3\u5982\u679c\u53ea\u60f3\u8981\u53d1\u9001\uff0c\u4e0d\u60f3\u8981\u63a5\u6536\u600e\u4e48\u529e\u5462\uff1f<\/p>\n<p>\u5f88\u7b80\u5355\uff0c\u5982\u679c\u4f60\u53ea\u60f3\u8981\u53d1\u9001\uff0c\u4e0d\u60f3\u8981\u63a5\u6536\uff0c\u4e5f\u662f\u6309\u7167\u8fd9\u4e2a\u903b\u8f91\uff0c\u53ea\u4e0d\u8fc7\u4ece\u673a\u53d1\u9001\u6765\u7684\u6570\u636e\u4f60\u4e0d\u7528\u770b\u5c31\u884c\u4e86\uff1b<\/p>\n<p>\u540c\u7406\uff0c\u5982\u679c\u4f60\u53ea\u60f3\u8981\u63a5\u6536\uff0c\u4e0d\u60f3\u8981\u53d1\u9001\uff0c\u90a3\u5c31\u7ed9\u4ece\u673a\u968f\u4fbf\u53d1\u9001\u4e2a\u6570\u636e\uff0c\u628a\u79fb\u4f4d\u5bc4\u5b58\u5668\u7684\u6570\u636e\u66ff\u6362\u8fc7\u6765\u5c31\u884c\u4e86\uff0c\u540c\u6837\uff0c\u4ece\u673a\u4e5f\u4e0d\u4f1a\u770b\u4f60\u968f\u4fbf\u53d1\u9001\u7684\u8fd9\u4e2a\u6570\u636e\uff08\u4e00\u822c\u662f0X00\u6216\u80050XFF\uff09\u3002<\/p>\n<h2>SPI\u65f6\u5e8f\u57fa\u672c\u5355\u5143<\/h2>\n<p>\u8d77\u59cb\u6761\u4ef6\uff1aSS\u4ece\u9ad8\u7535\u5e73\u5207\u6362\u5230\u4f4e\u7535\u5e73\u3002<\/p>\n<p>\u7ec8\u6b62\u6761\u4ef6\uff1aSS\u4ece\u4f4e\u7535\u5e73\u5207\u6362\u5230\u9ad8\u7535\u5e73\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1004\" src=\"https:\/\/aoofoo.com\/wp-content\/uploads\/2024\/09\/1-44.png\" alt=\"\" width=\"705\" height=\"114\" \/><\/p>\n<p>\u6570\u636e\u4f20\u8f93\u7684\u57fa\u672c\u5355\u5143\uff1a\u57fa\u672c\u5355\u5143\u662f\u5efa\u7acb\u5728\u521a\u624d\u7684\u79fb\u4f4d\u793a\u610f\u56fe\u4e0a\u3002<\/p>\n<p>\u5e76\u4e14\u8fd9\u4e2a\u57fa\u672c\u5355\u5143\uff0c\u4ec0\u4e48\u65f6\u5019\u5f00\u59cb\u79fb\u4f4d\uff1f\u662f\u4e0a\u5347\u6cbf\u79fb\u4f4d\u8fd8\u662f\u4e0b\u964d\u6cbf\u79fb\u4f4d\uff1fSPI\u5e76\u6ca1\u6709\u9650\u5b9a\u6b7b\uff0c\u7ed9\u4e86\u6211\u4eec\u53ef\u4ee5\u914d\u7f6e\u7684\u9009\u62e9\uff0c\u8fd9\u6837\u6211\u4eec\u5c31\u53ef\u4ee5\u517c\u5bb9\u66f4\u591a\u7684\u82af\u7247\u3002<\/p>\n<p>SPI\u6709\u4e24\u4e2a\u53ef\u4ee5\u914d\u7f6e\u7684\u4f4d\uff0c\u5206\u522b\u662f\uff1aCPOL(Clock Polarity)\u65f6\u949f\u6781\u6027\u3001CPHA\uff08Clock 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loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1006\" src=\"https:\/\/aoofoo.com\/wp-content\/uploads\/2024\/09\/1-45.png\" alt=\"\" width=\"1036\" height=\"347\" \/><\/p>\n<h3>\u6a21\u5f0f0\uff08?<span style=\"font-size: 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