{"id":883,"date":"2022-06-08T10:55:08","date_gmt":"2022-06-08T02:55:08","guid":{"rendered":"http:\/\/www.iotot.com\/?p=883"},"modified":"2022-06-08T10:55:08","modified_gmt":"2022-06-08T02:55:08","slug":"%e6%b7%b1%e5%85%a5%e5%89%96%e6%9e%90-spi-%e9%80%9a%e4%bf%a1%e5%8e%9f%e7%90%86%e5%8f%8a%e5%ba%94%e7%94%a8","status":"publish","type":"post","link":"https:\/\/blog.iotot.com\/?p=883","title":{"rendered":"\u6df1\u5165\u5256\u6790 SPI \u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528"},"content":{"rendered":"<p>SPI\uff1aSerial Peripheral Interface\uff0c\u4e32\u884c\u5916\u8bbe\u63a5\u53e3\uff0c\u5d4c\u5165\u5f0f\u3001\u5355\u7247\u673a\u4e2d\u5e38\u7528\u7684\u4e00\u79cd\u901a\u4fe1\u63a5\u53e3\u3002<\/p>\n<p>\u5916\u8bbe\u63a5\u53e3\uff08SPI\uff09\u662f\u5fae\u63a7\u5236\u5668\u548c\u5916\u56f4 IC\uff08\u5982\u4f20\u611f\u5668\u3001ADC\u3001DAC\u3001 \u79fb\u4f4d\u5bc4\u5b58\u5668\u3001SRAM\u7b49\uff09\u4e4b\u95f4\u4f7f\u7528\u6700\u5e7f\u6cdb\u7684\u63a5\u53e3\u4e4b\u4e00\u3002<\/p>\n<p>SPI \u662f\u4e00\u79cd\u540c\u6b65\u3001\u5168\u53cc\u5de5\u3001\u4e3b\u4ece\u5f0f\u63a5\u53e3\u3002\u6765\u81ea\u4e3b\u673a\u6216\u4ece\u673a\u7684\u6570\u636e\u5728\u65f6\u949f\u4e0a\u5347\u6cbf\u6216\u4e0b\u964d\u6cbf\u540c\u6b65\u3002\u4e3b\u673a\u548c\u4ece\u673a\u53ef\u4ee5\u540c\u65f6\u4f20\u8f93\u6570\u636e\u3002SPI \u63a5\u53e3\u53ef\u4ee5\u662f3\u7ebf\u5f0f\u62164\u7ebf\u5f0f\u3002\u672c\u6587\u91cd\u70b9\u4ecb\u7ecd\u5e38\u7528\u76844\u7ebfSPI\u63a5\u53e3\u3002<\/p>\n<p><strong>\u56db\u7ebf\u63a5\u53e3<\/strong><\/p>\n<p>4 \u7ebf SPI \u5668\u4ef6\u6709\u56db\u4e2a\u4fe1\u53f7\uff1a<br \/>\n\u65f6\u949f(SPICLK,SCLK)<br \/>\n\u7247\u9009(CS)\u4e3b\u673a\u8f93\u51fa<br \/>\n\u4ece\u673a\u8f93\u5165(MOSI)\u4e3b\u673a\u8f93\u5165<br \/>\n\u4ece\u673a\u8f93\u51fa(MISO)<\/p>\n<p>\u4ea7\u751f\u65f6\u949f\u4fe1\u53f7\u7684\u5668\u4ef6\u79f0\u4e3a\u4e3b\u673a\u3002\u4e3b\u673a\u548c\u4ece\u673a\u4e4b\u95f4\u4f20\u8f93\u7684\u6570\u636e\u4e0e\u4e3b\u673a\u4ea7\u751f\u7684\u65f6\u949f\u540c\u6b65\u3002\u540cI2C\u63a5\u53e3\u76f8\u6bd4\uff0cSPI\u5668\u4ef6\u652f\u6301\u66f4\u9ad8\u7684\u65f6\u949f\u9891\u7387\u3002\u7528\u6237\u5e94\u67e5\u9605\u4ea7\u54c1\u6570\u636e\u624b\u518c\u4ee5\u4e86\u89e3SPI\u63a5\u53e3\u7684\u65f6\u949f\u9891\u7387\u89c4\u683c\u3002<\/p>\n<p>SPI\u63a5\u53e3\u53ea\u80fd\u6709\u4e00\u4e2a\u4e3b\u673a\uff0c\u4f46\u53ef\u4ee5\u6709\u4e00\u4e2a\u6216\u591a\u4e2a\u4ece\u673a\u3002\u56fe1\u663e\u793a\u4e86\u4e3b\u673a\u548c\u4ece\u673a\u4e4b\u95f4\u7684SPI\u8fde\u63a5\u3002<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-897\" src=\"http:\/\/www.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528.png\" width=\"439\" height=\"174\" srcset=\"https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528.png 439w, https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-300x119.png 300w\" sizes=\"(max-width: 439px) 100vw, 439px\" \/><br \/>\n\u56fe1. \u542b\u4e3b\u673a\u548c\u4ece\u673a\u7684SPI\u914d\u7f6e<\/p>\n<p>\u6765\u81ea\u4e3b\u673a\u7684\u7247\u9009\u4fe1\u53f7\u7528\u4e8e\u9009\u62e9\u4ece\u673a\u3002\u8fd9\u901a\u5e38\u662f\u4e00\u4e2a\u4f4e\u7535\u5e73\u6709\u6548\u4fe1\u53f7\uff0c\u62c9\u9ad8\u65f6\u4ece\u673a\u4e0eSPI\u603b\u7ebf\u65ad\u5f00\u8fde\u63a5\u3002\u5f53\u4f7f\u7528\u591a\u4e2a\u4ece\u673a\u65f6\uff0c\u4e3b\u673a\u9700\u8981\u4e3a\u6bcf\u4e2a\u4ece\u673a\u63d0\u4f9b\u5355\u72ec\u7684\u7247\u9009\u4fe1\u53f7\u3002\u672c\u6587\u4e2d\u7684\u7247\u9009\u4fe1\u53f7\u59cb\u7ec8\u662f\u4f4e\u7535\u5e73\u6709\u6548\u4fe1\u53f7\u3002<\/p>\n<p>MOSI\u548cMISO\u662f\u6570\u636e\u7ebf\u3002MOSI\u5c06\u6570\u636e\u4ece\u4e3b\u673a\u53d1\u9001\u5230\u4ece\u673a\uff0cMISO\u5c06\u6570\u636e\u4ece\u4ece\u673a\u53d1\u9001\u5230\u4e3b\u673a\u3002<\/p>\n<p><strong>\u6570\u636e\u4f20\u8f93<\/strong><\/p>\n<p>\u8981\u5f00\u59cbSPI\u901a\u4fe1\uff0c\u4e3b\u673a\u5fc5\u987b\u53d1\u9001\u65f6\u949f\u4fe1\u53f7\uff0c\u5e76\u901a\u8fc7\u4f7f\u80fdCS\u4fe1\u53f7\u9009\u62e9\u4ece\u673a\u3002\u7247\u9009\u901a\u5e38\u662f\u4f4e\u7535\u5e73\u6709\u6548\u4fe1\u53f7\u3002\u56e0\u6b64\uff0c\u4e3b\u673a\u5fc5\u987b\u5728\u8be5\u4fe1\u53f7\u4e0a\u53d1\u9001\u903b\u8f910\u4ee5\u9009\u62e9\u4ece\u673a\u3002<\/p>\n<p>SPI\u662f\u5168\u53cc\u5de5\u63a5\u53e3\uff0c\u4e3b\u673a\u548c\u4ece\u673a\u53ef\u4ee5\u5206\u522b\u901a\u8fc7MOSI\u548cMISO\u7ebf\u8def\u540c\u65f6\u53d1\u9001\u6570\u636e\u3002\u5728SPI\u901a\u4fe1\u671f\u95f4\uff0c\u6570\u636e\u7684\u53d1\u9001(\u4e32\u884c\u79fb\u51fa\u5230MOSI\/SDO\u603b\u7ebf\u4e0a)\u548c\u63a5\u6536(\u91c7\u6837\u6216\u8bfb\u5165\u603b\u7ebf(MISO\/SDI)\u4e0a\u7684\u6570\u636e)\u540c\u65f6\u8fdb\u884c\u3002\u4e32\u884c\u65f6\u949f\u6cbf\u540c\u6b65\u6570\u636e\u7684\u79fb\u4f4d\u548c\u91c7\u6837\u3002<\/p>\n<p>SPI\u63a5\u53e3\u5141\u8bb8\u7528\u6237\u7075\u6d3b\u9009\u62e9\u65f6\u949f\u7684\u4e0a\u5347\u6cbf\u6216\u4e0b\u964d\u6cbf\u6765\u91c7\u6837\u548c\/\u6216\u79fb\u4f4d\u6570\u636e\u3002\u6b32\u786e\u5b9a\u4f7f\u7528SPI\u63a5\u53e3\u4f20\u8f93\u7684\u6570\u636e\u4f4d\u6570\uff0c\u8bf7\u53c2\u9605\u5668\u4ef6\u6570\u636e\u624b\u518c\u3002<\/p>\n<p>\u65f6\u949f\u6781\u6027\u548c\u65f6\u949f\u76f8\u4f4d<\/p>\n<p>\u5728SPI\u4e2d\uff0c\u4e3b\u673a\u53ef\u4ee5\u9009\u62e9\u65f6\u949f\u6781\u6027\u548c\u65f6\u949f\u76f8\u4f4d\u3002\u5728\u7a7a\u95f2\u72b6\u6001\u671f\u95f4\uff0cCPOL\u4f4d\u8bbe\u7f6e\u65f6\u949f\u4fe1\u53f7\u7684\u6781\u6027\u3002\u7a7a\u95f2\u72b6\u6001\u662f\u6307\u4f20\u8f93\u5f00\u59cb\u65f6CS\u4e3a\u9ad8\u7535\u5e73\u4e14\u5728\u5411\u4f4e\u7535\u5e73\u8f6c\u53d8\u7684\u671f\u95f4\uff0c\u4ee5\u53ca\u4f20\u8f93\u7ed3\u675f\u65f6CS\u4e3a\u4f4e\u7535\u5e73\u4e14\u5728\u5411\u9ad8\u7535\u5e73\u8f6c\u53d8\u7684\u671f\u95f4\u3002CPHA\u4f4d\u9009\u62e9\u65f6\u949f\u76f8\u4f4d\u3002<\/p>\n<p>\u6839\u636eCPHA\u4f4d\u7684\u72b6\u6001\uff0c\u4f7f\u7528\u65f6\u949f\u4e0a\u5347\u6cbf\u6216\u4e0b\u964d\u6cbf\u6765\u91c7\u6837\u548c\/\u6216\u79fb\u4f4d\u6570\u636e\u3002\u4e3b\u673a\u5fc5\u987b\u6839\u636e\u4ece\u673a\u7684\u8981\u6c42\u9009\u62e9\u65f6\u949f\u6781\u6027\u548c\u65f6\u949f\u76f8\u4f4d\u3002\u6839\u636eCPOL\u548cCPHA\u4f4d\u7684\u9009\u62e9\uff0c\u6709\u56db\u79cdSPI\u6a21\u5f0f\u53ef\u7528\u3002\u88681\u663e\u793a\u4e86\u8fd94\u79cdSPI\u6a21\u5f0f\u3002<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-898\" src=\"http:\/\/www.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528.jpg\" width=\"540\" height=\"260\" srcset=\"https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528.jpg 540w, https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-300x144.jpg 300w\" sizes=\"(max-width: 540px) 100vw, 540px\" \/><br \/>\n\u88681.\u901a\u8fc7CPOL\u548cCPHA\u9009\u62e9SPI\u6a21\u5f0f<\/p>\n<p>\u56fe2\u81f3\u56fe5\u663e\u793a\u4e86\u56db\u79cdSPI\u6a21\u5f0f\u4e0b\u7684\u901a\u4fe1\u793a\u4f8b\u3002\u5728\u8fd9\u4e9b\u793a\u4f8b\u4e2d\uff0c\u6570\u636e\u663e\u793a\u5728MOSI\u548cMISO\u7ebf\u4e0a\u3002\u4f20\u8f93\u7684\u5f00\u59cb\u548c\u7ed3\u675f\u7528\u7eff\u8272\u865a\u7ebf\u8868\u793a\uff0c\u91c7\u6837\u8fb9\u6cbf\u7528\u6a59\u8272\u865a\u7ebf\u8868\u793a\uff0c\u79fb\u4f4d\u8fb9\u6cbf\u7528\u84dd\u8272\u865a\u7ebf\u8868\u793a\u3002\u8bf7\u6ce8\u610f\uff0c\u8fd9\u4e9b\u56fe\u5f62\u4ec5\u4f9b\u53c2\u8003\u3002\u8981\u6210\u529f\u8fdb\u884cSPI\u901a\u4fe1\uff0c\u7528\u6237\u987b\u53c2\u9605\u4ea7\u54c1\u6570\u636e\u624b\u518c\u5e76\u786e\u4fdd\u6ee1\u8db3\u5668\u4ef6\u7684\u65f6\u5e8f\u89c4\u683c\u3002<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-899\" src=\"http:\/\/www.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-1.jpg\" width=\"540\" height=\"184\" srcset=\"https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-1.jpg 540w, https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-1-300x102.jpg 300w\" sizes=\"(max-width: 540px) 100vw, 540px\" \/><br \/>\n\u56fe2. SPI\u6a21\u5f0f0\uff0cCPOL = 0\uff0cCPHA = 0\uff1aCLK\u7a7a\u95f2\u72b6\u6001 = \u4f4e\u7535\u5e73\uff0c\u6570\u636e\u5728\u4e0a\u5347\u6cbf\u91c7\u6837\uff0c\u5e76\u5728\u4e0b\u964d\u6cbf\u79fb\u51fa<\/p>\n<p>\u56fe3\u7ed9\u51fa\u4e86SPI\u6a21\u5f0f1\u7684\u65f6\u5e8f\u56fe\u3002\u5728\u6b64\u6a21\u5f0f\u4e0b\uff0c\u65f6\u949f\u6781\u6027\u4e3a0\uff0c\u8868\u793a\u65f6\u949f\u4fe1\u53f7\u7684\u7a7a\u95f2\u72b6\u6001\u4e3a\u4f4e\u7535\u5e73\u3002\u6b64\u6a21\u5f0f\u4e0b\u7684\u65f6\u949f\u76f8\u4f4d\u4e3a1\uff0c\u8868\u793a\u6570\u636e\u5728\u4e0b\u964d\u6cbf\u91c7\u6837(\u7531\u6a59\u8272\u865a\u7ebf\u663e\u793a)\uff0c\u5e76\u4e14\u6570\u636e\u5728\u65f6\u949f\u4fe1\u53f7\u7684\u4e0a\u5347\u6cbf\u79fb\u51fa(\u7531\u84dd\u8272\u865a\u7ebf\u663e\u793a)\u3002<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-900\" src=\"http:\/\/www.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-2.jpg\" width=\"540\" height=\"149\" srcset=\"https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-2.jpg 540w, https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-2-300x83.jpg 300w\" sizes=\"(max-width: 540px) 100vw, 540px\" \/><br \/>\n\u56fe3. SPI\u6a21\u5f0f1\uff0cCPOL = 0\uff0cCPHA = 1\uff1aCLK\u7a7a\u95f2\u72b6\u6001 = \u4f4e\u7535\u5e73\uff0c\u6570\u636e\u5728\u4e0b\u964d\u6cbf\u91c7\u6837\uff0c\u5e76\u5728\u4e0a\u5347\u6cbf\u79fb\u51fa<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-901\" src=\"http:\/\/www.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-3.jpg\" width=\"540\" height=\"140\" srcset=\"https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-3.jpg 540w, https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-3-300x78.jpg 300w\" sizes=\"(max-width: 540px) 100vw, 540px\" \/><br \/>\n\u56fe4. SPI\u6a21\u5f0f2\uff0cCPOL = 1\uff0cCPHA = 1\uff1aCLK\u7a7a\u95f2\u72b6\u6001 = \u9ad8\u7535\u5e73\uff0c\u6570\u636e\u5728\u4e0b\u964d\u6cbf\u91c7\u6837\uff0c\u5e76\u5728\u4e0a\u5347\u6cbf\u79fb\u51fa<\/p>\n<p>\u56fe4\u7ed9\u51fa\u4e86SPI\u6a21\u5f0f2\u7684\u65f6\u5e8f\u56fe\u3002\u5728\u6b64\u6a21\u5f0f\u4e0b\uff0c\u65f6\u949f\u6781\u6027\u4e3a1\uff0c\u8868\u793a\u65f6\u949f\u4fe1\u53f7\u7684\u7a7a\u95f2\u72b6\u6001\u4e3a\u9ad8\u7535\u5e73\u3002\u6b64\u6a21\u5f0f\u4e0b\u7684\u65f6\u949f\u76f8\u4f4d\u4e3a1\uff0c\u8868\u793a\u6570\u636e\u5728\u4e0b\u964d\u6cbf\u91c7\u6837(\u7531\u6a59\u8272\u865a\u7ebf\u663e\u793a)\uff0c\u5e76\u4e14\u6570\u636e\u5728\u65f6\u949f\u4fe1\u53f7\u7684\u4e0a\u5347\u6cbf\u79fb\u51fa(\u7531\u84dd\u8272\u865a\u7ebf\u663e\u793a)\u3002<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-902\" src=\"http:\/\/www.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-4.jpg\" width=\"540\" height=\"184\" srcset=\"https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-4.jpg 540w, https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-4-300x102.jpg 300w\" sizes=\"(max-width: 540px) 100vw, 540px\" \/><br \/>\n\u56fe5. SPI\u6a21\u5f0f3\uff0cCPOL = 1\uff0cCPHA = 0\uff1aCLK\u7a7a\u95f2\u72b6\u6001 = \u9ad8\u7535\u5e73\uff0c\u6570\u636e\u5728\u4e0a\u5347\u6cbf\u91c7\u6837\uff0c\u5e76\u5728\u4e0b\u964d\u6cbf\u79fb\u51fa<\/p>\n<p>\u56fe5\u7ed9\u51fa\u4e86SPI\u6a21\u5f0f3\u7684\u65f6\u5e8f\u56fe\u3002\u5728\u6b64\u6a21\u5f0f\u4e0b\uff0c\u65f6\u949f\u6781\u6027\u4e3a1\uff0c\u8868\u793a\u65f6\u949f\u4fe1\u53f7\u7684\u7a7a\u95f2\u72b6\u6001\u4e3a\u9ad8\u7535\u5e73\u3002\u6b64\u6a21\u5f0f\u4e0b\u7684\u65f6\u949f\u76f8\u4f4d\u4e3a0\uff0c\u8868\u793a\u6570\u636e\u5728\u4e0a\u5347\u6cbf\u91c7\u6837(\u7531\u6a59\u8272\u865a\u7ebf\u663e\u793a)\uff0c\u5e76\u4e14\u6570\u636e\u5728\u65f6\u949f\u4fe1\u53f7\u7684\u4e0b\u964d\u6cbf\u79fb\u51fa(\u7531\u84dd\u8272\u865a\u7ebf\u663e\u793a)\u3002<\/p>\n<p><strong>\u591a\u4ece\u673a\u914d\u7f6e<\/strong><\/p>\n<p>\u591a\u4e2a\u4ece\u673a\u53ef\u4e0e\u5355\u4e2aSPI\u4e3b\u673a\u4e00\u8d77\u4f7f\u7528\u3002\u4ece\u673a\u53ef\u4ee5\u91c7\u7528\u5e38\u89c4\u6a21\u5f0f\u8fde\u63a5\uff0c\u6216\u91c7\u7528\u83ca\u82b1\u94fe\u6a21\u5f0f\u8fde\u63a5\u3002<\/p>\n<p><strong>\u5e38\u89c4SPI\u6a21\u5f0f<\/strong><\/p>\n<p>\u5728\u5e38\u89c4\u6a21\u5f0f\u4e0b\uff0c\u4e3b\u673a\u9700\u8981\u4e3a\u6bcf\u4e2a\u4ece\u673a\u63d0\u4f9b\u5355\u72ec\u7684\u7247\u9009\u4fe1\u53f7\u3002\u4e00\u65e6\u4e3b\u673a\u4f7f\u80fd(\u62c9\u4f4e)\u7247\u9009\u4fe1\u53f7\uff0cMOSI\/MISO\u7ebf\u4e0a\u7684\u65f6\u949f\u548c\u6570\u636e\u4fbf\u53ef\u7528\u4e8e\u6240\u9009\u7684\u4ece\u673a\u3002\u5982\u679c\u4f7f\u80fd\u591a\u4e2a\u7247\u9009\u4fe1\u53f7\uff0c\u5219MISO\u7ebf\u4e0a\u7684\u6570\u636e\u4f1a\u88ab\u7834\u574f\uff0c\u56e0\u4e3a\u4e3b\u673a\u65e0\u6cd5\u8bc6\u522b\u54ea\u4e2a\u4ece\u673a\u6b63\u5728\u4f20\u8f93\u6570\u636e\u3002<br \/>\n\u4ece\u56fe6\u53ef\u4ee5\u770b\u51fa\uff0c\u968f\u7740\u4ece\u673a\u6570\u91cf\u7684\u589e\u52a0\uff0c\u6765\u81ea\u4e3b\u673a\u7684\u7247\u9009\u7ebf\u7684\u6570\u91cf\u4e5f\u589e\u52a0\u3002\u8fd9\u4f1a\u5feb\u901f\u589e\u52a0\u4e3b\u673a\u9700\u8981\u63d0\u4f9b\u7684\u8f93\u5165\u548c\u8f93\u51fa\u6570\u91cf\uff0c\u5e76\u9650\u5236\u53ef\u4ee5\u4f7f\u7528\u7684\u4ece\u673a\u6570\u91cf\u3002\u53ef\u4ee5\u4f7f\u7528\u5176\u4ed6\u6280\u672f\u6765\u589e\u52a0\u5e38\u89c4\u6a21\u5f0f\u4e0b\u7684\u4ece\u673a\u6570\u91cf\uff0c\u4f8b\u5982\u4f7f\u7528\u591a\u8def\u590d\u7528\u5668\u4ea7\u751f\u7247\u9009\u4fe1\u53f7\u3002<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-903\" src=\"http:\/\/www.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-5.jpg\" width=\"540\" height=\"240\" srcset=\"https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-5.jpg 540w, https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-5-300x133.jpg 300w\" sizes=\"(max-width: 540px) 100vw, 540px\" \/><br \/>\n\u56fe6. \u591a\u4ece\u673aSPI\u914d\u7f6e<\/p>\n<p><strong>\u83ca\u82b1\u94fe\u6a21\u5f0f<\/strong><\/p>\n<p>\u5728\u83ca\u82b1\u94fe\u6a21\u5f0f\u4e0b\uff0c\u6240\u6709\u4ece\u673a\u7684\u7247\u9009\u4fe1\u53f7\u8fde\u63a5\u5728\u4e00\u8d77\uff0c\u6570\u636e\u4ece\u4e00\u4e2a\u4ece\u673a\u4f20\u64ad\u5230\u4e0b\u4e00\u4e2a\u4ece\u673a\u3002\u5728\u6b64\u914d\u7f6e\u4e2d\uff0c\u6240\u6709\u4ece\u673a\u540c\u65f6\u63a5\u6536\u540c\u4e00SPI\u65f6\u949f\u3002\u6765\u81ea\u4e3b\u673a\u7684\u6570\u636e\u76f4\u63a5\u9001\u5230\u7b2c\u4e00\u4e2a\u4ece\u673a\uff0c\u8be5\u4ece\u673a\u5c06\u6570\u636e\u63d0\u4f9b\u7ed9\u4e0b\u4e00\u4e2a\u4ece\u673a\uff0c\u4f9d\u6b64\u7c7b\u63a8\u3002<\/p>\n<p>\u4f7f\u7528\u8be5\u65b9\u6cd5\u65f6\uff0c\u7531\u4e8e\u6570\u636e\u662f\u4ece\u4e00\u4e2a\u4ece\u673a\u4f20\u64ad\u5230\u4e0b\u4e00\u4e2a\u4ece\u673a\uff0c\u6240\u4ee5\u4f20\u8f93\u6570\u636e\u6240\u9700\u7684\u65f6\u949f\u5468\u671f\u6570\u4e0e\u83ca\u82b1\u94fe\u4e2d\u7684\u4ece\u673a\u4f4d\u7f6e\u6210\u6bd4\u4f8b\u3002\u4f8b\u5982\u5728\u56fe7\u6240\u793a\u76848\u4f4d\u7cfb\u7edf\u4e2d\uff0c\u4e3a\u4f7f\u7b2c3\u4e2a\u4ece\u673a\u80fd\u591f\u83b7\u5f97\u6570\u636e\uff0c\u9700\u898124\u4e2a\u65f6\u949f\u8109\u51b2\uff0c\u800c\u5e38\u89c4SPI\u6a21\u5f0f\u4e0b\u53ea\u97008\u4e2a\u65f6\u949f\u8109\u51b2\u3002<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-904\" src=\"http:\/\/www.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-6.jpg\" width=\"354\" height=\"460\" srcset=\"https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-6.jpg 354w, https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-6-231x300.jpg 231w\" sizes=\"(max-width: 354px) 100vw, 354px\" \/><br \/>\n\u56fe7. \u591a\u4ece\u673aSPI\u83ca\u82b1\u94fe\u914d\u7f6e<\/p>\n<p>\u56fe8\u663e\u793a\u4e86\u65f6\u949f\u5468\u671f\u548c\u901a\u8fc7\u83ca\u82b1\u94fe\u7684\u6570\u636e\u4f20\u64ad\u3002\u5e76\u975e\u6240\u6709SPI\u5668\u4ef6\u90fd\u652f\u6301\u83ca\u82b1\u94fe\u6a21\u5f0f\u3002\u8bf7\u53c2\u9605\u4ea7\u54c1\u6570\u636e\u624b\u518c\u4ee5\u786e\u8ba4\u83ca\u82b1\u94fe\u662f\u5426\u53ef\u7528\u3002<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-905\" src=\"http:\/\/www.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-7.jpg\" width=\"540\" height=\"341\" srcset=\"https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-7.jpg 540w, https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-7-300x189.jpg 300w\" sizes=\"(max-width: 540px) 100vw, 540px\" \/><br \/>\n\u56fe8. \u83ca\u82b1\u94fe\u914d\u7f6e\uff1a\u6570\u636e\u4f20\u64ad<\/p>\n<p><strong>ADI \u652f\u6301 SPI \u7684\u6a21\u62df\u5f00\u5173\u4e0e\u591a\u8def\u8f6c\u6362\u5668<\/strong><\/p>\n<p>ADI\u516c\u53f8\u6700\u65b0\u4e00\u4ee3\u652f\u6301SPI\u7684\u5f00\u5173\u53ef\u5728\u4e0d\u5f71\u54cd\u7cbe\u5bc6\u5f00\u5173\u6027\u80fd\u7684\u60c5\u51b5\u4e0b\u663e\u8457\u8282\u7701\u7a7a\u95f4\u3002\u672c\u6587\u7684\u8fd9\u4e00\u90e8\u5206\u5c06\u8ba8\u8bba\u4e00\u4e2a\u6848\u4f8b\u7814\u7a76\uff0c\u8bf4\u660e\u652f\u6301SPI\u7684\u5f00\u5173\u6216\u591a\u8def\u590d\u7528\u5668\u5982\u4f55\u80fd\u591f\u5927\u5927\u7b80\u5316\u7cfb\u7edf\u7ea7\u8bbe\u8ba1\u5e76\u51cf\u5c11\u6240\u9700\u7684GPIO\u6570\u91cf\u3002<\/p>\n<p><a href=\"https:\/\/www.infinigo.com\/s?wd=ADG1412\" target=\"_blank\" rel=\"noopener\">ADG1412<\/a>\u662f\u4e00\u6b3e\u56db\u901a\u9053\u3001\u5355\u5200\u5355\u63b7(SPST)\u5f00\u5173\uff0c\u9700\u8981\u56db\u4e2aGPIO\u8fde\u63a5\u5230\u6bcf\u4e2a\u5f00\u5173\u7684\u63a7\u5236\u8f93\u5165\u3002\u56fe9\u663e\u793a\u4e86\u5fae\u63a7\u5236\u5668\u548c\u4e00\u4e2aADG1412\u4e4b\u95f4\u7684\u8fde\u63a5\u3002<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-906\" src=\"http:\/\/www.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-8.jpg\" width=\"523\" height=\"354\" srcset=\"https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-8.jpg 523w, https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-8-300x203.jpg 300w\" sizes=\"(max-width: 523px) 100vw, 523px\" \/><br \/>\n\u56fe9. \u5fae\u63a7\u5236\u5668GPIO\u7528\u4f5c\u5f00\u5173\u7684\u63a7\u5236\u4fe1\u53f7<\/p>\n<p>\u968f\u7740\u7535\u8def\u677f\u4e0a\u5f00\u5173\u6570\u91cf\u7684\u589e\u52a0\uff0c\u6240\u9700GPIO\u7684\u6570\u91cf\u4e5f\u4f1a\u663e\u8457\u589e\u52a0\u3002\u4f8b\u5982\uff0c\u5f53\u8bbe\u8ba1\u4e00\u4e2a\u6d4b\u8bd5\u4eea\u5668\u7cfb\u7edf\u65f6\uff0c\u4f1a\u4f7f\u7528\u5927\u91cf\u5f00\u5173\u6765\u589e\u52a0\u7cfb\u7edf\u4e2d\u7684\u901a\u9053\u6570\u3002\u57284\u00d74\u4ea4\u53c9\u70b9\u77e9\u9635\u914d\u7f6e\u4e2d\uff0c\u4f7f\u7528\u56db\u4e2aADG1412\u3002\u6b64\u7cfb\u7edf\u9700\u898116\u4e2aGPIO\uff0c\u9650\u5236\u4e86\u6807\u51c6\u5fae\u63a7\u5236\u5668\u4e2d\u7684\u53ef\u7528GPIO\u3002\u56fe10\u663e\u793a\u4e86\u4f7f\u7528\u5fae\u63a7\u5236\u5668\u768416\u4e2aGPIO\u8fde\u63a5\u56db\u4e2aADG1412\u3002<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-907\" src=\"http:\/\/www.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-9.jpg\" width=\"540\" height=\"227\" srcset=\"https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-9.jpg 540w, https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-9-300x126.jpg 300w\" sizes=\"(max-width: 540px) 100vw, 540px\" \/><br \/>\n\u56fe10. \u5728\u591a\u4ece\u673a\u914d\u7f6e\u4e2d\uff0c\u6240\u9700GPIO\u7684\u6570\u91cf\u5927\u5e45\u589e\u52a0<\/p>\n<p><strong>\u5982\u4f55\u51cf\u5c11 GPIO \u6570\u91cf?<\/strong><\/p>\n<p>\u4e00\u79cd\u65b9\u6cd5\u662f\u4f7f\u7528\u4e32\u884c\u8f6c\u5e76\u884c\u8f6c\u6362\u5668\uff0c\u5982\u56fe11\u6240\u793a\u3002\u8be5\u5668\u4ef6\u8f93\u51fa\u7684\u5e76\u884c\u4fe1\u53f7\u53ef\u8fde\u63a5\u5230\u5f00\u5173\u63a7\u5236\u8f93\u5165\uff0c\u5668\u4ef6\u53ef\u901a\u8fc7\u4e32\u884c\u63a5\u53e3SPI\u914d\u7f6e\u3002\u6b64\u65b9\u6cd5\u7684\u7f3a\u70b9\u662f\u5916\u52a0\u5668\u4ef6\u4f1a\u5bfc\u81f4\u7269\u6599\u6e05\u5355\u589e\u52a0\u3002<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-908\" src=\"http:\/\/www.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-10.jpg\" width=\"540\" height=\"228\" srcset=\"https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-10.jpg 540w, https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-10-300x127.jpg 300w\" sizes=\"(max-width: 540px) 100vw, 540px\" \/><br \/>\n\u56fe11. 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class=\"alignnone size-full wp-image-909\" src=\"http:\/\/www.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-11.jpg\" width=\"540\" height=\"212\" srcset=\"https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-11.jpg 540w, https:\/\/blog.iotot.com\/wp-content\/uploads\/2022\/06\/\u6df1\u5165\u5256\u6790-spi-\u901a\u4fe1\u539f\u7406\u53ca\u5e94\u7528-11-300x118.jpg 300w\" sizes=\"(max-width: 540px) 100vw, 540px\" \/><\/p>\n<div id=\"aimg_588179_menu\" class=\"tip tip_4 aimg_tip\">\n<div class=\"xs0\"><\/div>\n<\/div>\n<p>\u56fe12. \u652f\u6301SPI\u7684\u5f00\u5173\u8282\u7701\u5fae\u63a7\u5236\u5668GPIO<\/p>\n","protected":false},"excerpt":{"rendered":"<p>SPI\uff1aSerial Peripheral Interface\uff0c\u4e32\u884c\u5916\u8bbe\u63a5\u53e3\uff0c\u5d4c\u5165\u5f0f\u3001\u5355\u7247\u673a\u4e2d\u5e38\u7528\u7684\u4e00\u79cd\u901a\u4fe1\u63a5 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