\n\t![\"stm32\u5355\u7247\u673aGPIO\u7aef\u53e3\u7684\u7279\u70b9\u53ca\u5e94\u7528\u89e3\u6790\"](\"http:\/\/www.szryc.com\/uploads\/allimg\/191104\/0950335E1-0.png\")
<\/p>\n
\n\t\uff08\u4e00\uff09\u6bcf\u4e00\u4e2aIO\u5f15\u811a\u90fd\u53ef\u4ee5\u4f7f\u7528\u8f6f\u4ef6\u914d\u7f6e\u4e3a\u4ee5\u4e0b\u51e0\u79cd\u6a21\u5f0f\uff1a<\/p>\n
\n\t1. \u6d6e\u7a7a\u8f93\u5165<\/p>\n
\n\t2. \u5e26\u4e0a\u62c9\u8f93\u5165<\/p>\n
\n\t3. \u5e26\u4e0b\u62c9\u8f93\u5165<\/p>\n
\n\t4. \u6a21\u62df\u8f93\u5165<\/p>\n
\n\t5. \u5f00\u6f0f\u8f93\u51fa——\uff08\u6b64\u6a21\u5f0f\u53ef\u5b9e\u73b0hotpower\u8bf4\u7684\u771f\u53cc\u5411IO\uff09<\/p>\n
\n\t6. \u63a8\u633d\u8f93\u51fa<\/p>\n
\n\t7. \u590d\u7528\u529f\u80fd\u7684\u63a8\u633d\u8f93\u51fa<\/p>\n
\n\t8. \u590d\u7528\u529f\u80fd\u7684\u5f00\u6f0f\u8f93\u51fa<\/p>\n
\n\t\u6a21\u5f0f7\u548c\u6a21\u5f0f8\u9700\u6839\u636e\u5177\u4f53\u7684\u590d\u7528\u529f\u80fd\u51b3\u5b9a\u3002<\/p>\n
\n\t\u6bcf\u4e00\u4e2aIO\u5f15\u811a\u90fd\u53ef\u4ee5\u5355\u72ec\u7f16\u7a0b\uff0c\u4f46\u662f\u6bcf\u4e00\u4e2aIO\u5bc4\u5b58\u5668\u53ea\u80fd32bits\u8bbf\u95ee\uff08\u534a\u5b57\u6216\u8005\u5b57\u8282\u8bbf\u95ee\u90fd\u88ab\u7981\u6b62\uff09\u3002<\/p>\n
\n\t\uff08\u4e8c\uff09\u4e13\u95e8\u7684\u5bc4\u5b58\u5668\uff08GPIOx_BSRR\u548cGPIOx_BRR\uff09\u5b9e\u73b0\u5bf9GPIO\u53e3\u7684\u539f\u5b50\u64cd\u4f5c\uff0c\u5373\u56de\u907f\u4e86\u8bbe\u7f6e\u6216\u6e05\u9664I\/O<\/u>\u7aef\u53e3\u65f6\u7684“\u8bfb-\u4fee\u6539-\u5199”\u64cd\u4f5c\uff0c\u4f7f\u5f97\u8bbe\u7f6e\u6216\u6e05\u9664I\/O\u7aef\u53e3\u7684\u64cd\u4f5c\u4e0d\u4f1a\u88ab\u4e2d\u65ad\u5904\u7406\u6253\u65ad\u800c\u9020\u6210\u8bef\u52a8\u4f5c\u3002<\/p>\n
\n\t\uff08\u4e09\uff09\u6bcf\u4e2aGPIO\u53e3\u90fd\u53ef\u4ee5\u4f5c\u4e3a\u5916\u90e8\u4e2d\u65ad\u7684\u8f93\u5165\uff0c\u4fbf\u4e8e\u7cfb\u7edf\u7075\u6d3b\u8bbe\u8ba1\u3002<\/p>\n
\n\t\uff08\u56db\uff09I\/O\u53e3\u7684\u8f93\u51fa\u6a21\u5f0f\u4e0b\uff0c\u67093\u79cd\u8f93\u51fa\u901f\u5ea6\u53ef\u9009\uff082MHz\u300110MHz\u548c50MHz\uff09\uff0c\u8fd9\u6709\u5229\u4e8e\u566a\u58f0\u63a7\u5236\u3002<\/p>\n
\n\t\uff08\u4e94\uff09\u6240\u6709I\/O\u53e3\u517c\u5bb9CMOS\u548cTTL\uff0c\u591a\u6570I\/O\u53e3\u517c\u5bb95V\u7535\u5e73\u3002<\/p>\n
\n\t\uff08\u516d\uff09\u5927\u7535\u6d41<\/u>\u9a71\u52a8\u80fd\u529b\uff1aGPIO\u53e3\u5728\u9ad8\u4f4e\u7535\u5e73\u5206\u522b\u4e3a0.4V\u548cVDD-0.4V\u65f6\uff0c\u53ef\u4ee5\u63d0\u4f9b\u6216\u5438\u65368mA\u7535\u6d41\uff1b\u5982\u679c\u628a\u8f93\u5165\u8f93\u51fa\u7535\u5e73\u5206\u522b\u653e\u5bbd\u52301.3V\u548cVDD-1.3V\u65f6\uff0c\u53ef\u4ee5\u63d0\u4f9b\u6216\u5438\u653620mA\u7535\u6d41\u3002<\/p>\n
\n\t\uff08\u4e03\uff09\u5177\u6709\u72ec\u7acb\u7684\u5524\u9192I\/O\u53e3\u3002<\/p>\n
\n\t\uff08\u516b\uff09\u5f88\u591aI\/O\u53e3\u7684\u590d\u7528\u529f\u80fd\u53ef\u4ee5\u91cd\u65b0\u6620\u5c04\u3002<\/p>\n
\n\t\uff08\u4e5d\uff09GPIO\u53e3\u7684\u914d\u7f6e\u5177\u6709\u4e0a\u9501<\/u>\u529f\u80fd\uff0c\u5f53\u914d\u7f6e\u597dGPIO\u53e3\u540e\uff0c\u53ef\u4ee5\u901a\u8fc7\u7a0b\u5e8f\u9501\u4f4f\u914d\u7f6e\u7ec4\u5408\uff0c\u76f4\u5230\u4e0b\u6b21\u82af\u7247\u590d\u4f4d\u624d\u80fd\u89e3\u9501\u3002\u6b64\u529f\u80fd\u975e\u5e38\u6709\u5229\u4e8e\u5728\u7a0b\u5e8f\u8dd1\u98de\u7684\u60c5\u51b5\u4e0b\u4fdd\u62a4\u7cfb\u7edf\u4e2d\u5176\u4ed6\u7684\u8bbe\u5907\uff0c\u4e0d\u4f1a\u56e0\u4e3a\u67d0\u4e9bI\/O\u53e3\u7684\u914d\u7f6e\u88ab\u6539\u53d8\u800c\u635f\u574f——\u5982\u4e00\u4e2a\u8f93\u5165\u53e3\u53d8\u6210\u8f93\u51fa\u53e3\u5e76\u8f93\u51fa\u7535\u6d41\u3002<\/p>\n
\n\t\u4e8c\u3001GPIO\u7684\u914d\u7f6e<\/p>\n
\n\t\uff08\u4e00\uff09 GPIO\u6a21\u5f0f\u9009\u62e9\u548c\u901f\u5ea6\u5339\u914d<\/p>\n
\n\t\uff081\uff09 \u6d6e\u7a7a\u8f93\u5165_IN_FLOATING ——\u6d6e\u7a7a\u8f93\u5165\uff0c\u53ef\u4ee5\u505aKEY\u8bc6\u522b\uff0cRX1\u3002<\/p>\n
\n\t\uff082\uff09\u5e26\u4e0a\u62c9\u8f93\u5165_IPU——IO\u5185\u90e8\u4e0a\u62c9\u7535\u963b<\/u>\u8f93\u5165\u3002<\/p>\n
\n\t\uff083\uff09\u5e26\u4e0b\u62c9\u8f93\u5165_IPD—— IO\u5185\u90e8\u4e0b\u62c9\u7535\u963b\u8f93\u5165\u3002<\/p>\n
\n\t\uff084\uff09 \u6a21\u62df\u8f93\u5165_AI<\/u>N ——\u5e94\u7528ADC<\/u>\u6a21\u62df\u8f93\u5165\uff0c\u6216\u8005\u4f4e\u529f\u8017\u4e0b\u7701\u7535\u3002<\/p>\n
\n\t\uff085\uff09\u5f00\u6f0f\u8f93\u51fa_OUT_OD ——IO\u8f93\u51fa0\u63a5GND\uff0cIO\u8f93\u51fa1\uff0c\u60ac\u7a7a\uff0c\u9700\u8981\u5916\u63a5\u4e0a\u62c9\u7535\u963b\uff0c\u624d\u80fd\u5b9e\u73b0\u8f93\u51fa\u9ad8\u7535\u5e73\u3002\u5f53\u8f93\u51fa\u4e3a1\u65f6\uff0cIO\u53e3\u7684\u72b6\u6001\u7531\u4e0a\u62c9\u7535\u963b\u62c9\u9ad8\u7535\u5e73\uff0c\u4f46\u7531\u4e8e\u662f\u5f00\u6f0f\u8f93\u51fa\u6a21\u5f0f\uff0c\u8fd9\u6837IO\u53e3\u4e5f\u5c31\u53ef\u4ee5\u7531\u5916\u90e8\u7535\u8def<\/u>\u6539\u53d8\u4e3a\u4f4e\u7535\u5e73\u6216\u4e0d\u53d8\u3002\u53ef\u4ee5\u8bfbIO\u8f93\u5165\u7535\u5e73\u53d8\u5316\uff0c\u5b9e\u73b0C51\u7684IO\u53cc\u5411\u529f\u80fd\u3002<\/p>\n
\n\t\uff086\uff09\u63a8\u633d\u8f93\u51fa_OUT_PP ——IO\u8f93\u51fa0-\u63a5GND\uff0c IO\u8f93\u51fa1 -\u63a5VCC\uff0c\u8bfb\u8f93\u5165\u503c\u662f\u672a\u77e5\u7684\u3002<\/p>\n
\n\t\uff087\uff09\u590d\u7528\u529f\u80fd\u7684\u63a8\u633d\u8f93\u51fa_AF_PP ——\u7247\u5185\u5916\u8bbe\u529f\u80fd\uff08I 2C\u7684SCL\uff0cSDA\uff09<\/p>\n
\n\t\uff088\uff09\u590d\u7528\u529f\u80fd\u7684\u5f00\u6f0f\u8f93\u51fa_AF_OD——\u7247\u5185\u5916\u8bbe\u529f\u80fd\uff08TX1\uff0cMOSI\uff0cMI<\/u>SO.SCK\uff09<\/p>\n
\n\tGPIO\u8f93\u51fa\u7684\u901f\u5ea6\u5339\u914d\uff1a<\/p>\n
\n\tGPIO_Speed_10MHz \u6700\u9ad8\u8f93\u51fa\u901f\u738710MHz<\/p>\n
\n\tGPIO_Speed_2MHz \u6700\u9ad8\u8f93\u51fa\u901f\u73872MHz<\/p>\n
\n\tGPIO_Speed_50MHz \u6700\u9ad8\u8f93\u51fa\u901f\u738750MHz<\/p>\n
\n\tI\/O\u53e3\u7684\u8f93\u51fa\u6a21\u5f0f\u4e0b\uff0c\u67093\u79cd\u8f93\u51fa\u901f\u5ea6\u53ef\u9009\uff082MHz\u300110MHz\u548c50MHz\uff09\uff0c\u8fd9\u4e2a\u901f\u5ea6\u662f\u6307I\/O\u53e3\u9a71\u52a8\u7535\u8def\u7684\u54cd\u5e94\u901f\u5ea6\u800c\u4e0d\u662f\u8f93\u51fa\u4fe1\u53f7\u7684\u901f\u5ea6\uff0c\u8f93\u51fa\u4fe1\u53f7\u7684\u901f\u5ea6\u4e0e\u7a0b\u5e8f\u6709\u5173\uff08\u82af\u7247\u5185\u90e8\u5728I\/O\u53e3\u7684\u8f93\u51fa\u90e8\u5206\u5b89\u6392\u4e86\u591a\u4e2a\u4e0d\u540c\u54cd\u5e94\u901f\u5ea6\u7684\u8f93\u51fa\u9a71\u52a8\u7535\u8def\uff0c\u7528\u6237\u53ef\u4ee5\u6839\u636e\u81ea\u5df1\u7684\u9700\u8981\u9009\u62e9\u5408\u9002\u7684\u9a71\u52a8\u7535\u8def\uff09\u3002\u901a\u8fc7\u9009\u62e9\u901f\u5ea6\u6765\u9009\u62e9\u4e0d\u540c\u7684\u8f93\u51fa\u9a71\u52a8\u6a21\u5757\uff0c\u8fbe\u5230\u6700\u4f73\u7684\u566a\u58f0\u63a7\u5236\u548c\u964d\u4f4e\u529f\u8017\u7684\u76ee\u7684\u3002\u9ad8\u9891\u7684\u9a71\u52a8\u7535\u8def\uff0c\u566a\u58f0\u4e5f\u9ad8\uff0c\u5f53\u4e0d\u9700\u8981\u9ad8\u7684\u8f93\u51fa\u9891\u7387\u65f6\uff0c\u8bf7\u9009\u7528\u4f4e\u9891\u9a71\u52a8\u7535\u8def\uff0c\u8fd9\u6837\u975e\u5e38\u6709\u5229\u4e8e\u63d0\u9ad8\u7cfb\u7edf\u7684EMI\u6027\u80fd\u3002\u5f53\u7136\u5982\u679c\u8981\u8f93\u51fa\u8f83\u9ad8\u9891\u7387\u7684\u4fe1\u53f7\uff0c\u4f46\u5374\u9009\u7528\u4e86\u8f83\u4f4e\u9891\u7387\u7684\u9a71\u52a8\u6a21\u5757\uff0c\u5f88\u53ef\u80fd\u4f1a\u5f97\u5230\u5931\u771f\u7684\u8f93\u51fa\u4fe1\u53f7\u3002<\/p>\n
\n\t\u6709\u4e00\u70b9\u662f\u5173\u952e\uff0c\u5373GPIO\u7684\u5f15\u811a\u901f\u5ea6\u8ddf\u5e94\u7528\u5339\u914d\uff08\u63a8\u835010\u500d\u4ee5\u4e0a\uff09\u3002\u6bd4\u5982\uff1a<\/p>\n
\n\t1\uff09 \u5bf9\u4e8e\u4e32\u53e3\uff0c\u5047\u5982\u6700\u5927\u6ce2\u7279\u7387\u53ea\u9700115.2k\uff0c\u90a3\u4e48\u75282M\u7684GPIO\u7684\u5f15\u811a\u901f\u5ea6\u5c31\u591f\u4e86\uff0c\u65e2\u7701\u7535\u4e5f\u566a\u58f0\u5c0f\u3002<\/p>\n
\n\t2 \uff09\u5bf9\u4e8eI2C<\/u>\u63a5\u53e3<\/u>\uff0c\u5047\u5982\u4f7f\u7528400k\u6ce2\u7279\u7387\uff0c\u82e5\u60f3\u628a\u4f59\u91cf\u7559\u5927\u4e9b\uff0c\u90a3\u4e48\u75282M\u7684GPIO\u7684\u5f15\u811a\u901f\u5ea6\u6216\u8bb8\u4e0d\u591f\uff0c\u8fd9\u65f6\u53ef\u4ee5\u9009\u752810M\u7684GPIO\u5f15\u811a\u901f\u5ea6\u3002<\/p>\n
\n\t3 \uff09\u5bf9\u4e8eSPI\u63a5\u53e3\uff0c\u5047\u5982\u4f7f\u752818M\u62169M\u6ce2\u7279\u7387\uff0c\u752810M\u7684GPIO\u7684\u5f15\u811a\u901f\u5ea6\u663e\u7136\u4e0d\u591f\u4e86\uff0c\u9700\u8981\u9009\u752850M\u7684GPIO\u7684\u5f15\u811a\u901f\u5ea6\u3002<\/p>\n
\n\t\uff08\u4e8c\uff09 \u5728STM32\u4e2d\u5982\u4f55\u914d\u7f6e\u7247\u5185\u5916\u8bbe\u4f7f\u7528\u7684IO\u7aef\u53e3<\/p>\n
\n\t\u2460\u914d\u7f6e\u8f93\u5165\u7684\u65f6\u949f<\/u>\uff1b\u2461\u521d\u59cb\u5316\u540e\u5373\u88ab\u6fc0\u6d3b\uff08\u5f00\u542f\uff09\uff1b\u2462\u5982\u679c\u4f7f\u7528\u8be5\u5916\u8bbe\u7684\u8f93\u5165\u8f93\u51fa\u7ba1\u811a\uff0c\u5219\u9700\u8981\u914d\u7f6e\u76f8\u5e94\u7684GPIO\u7aef\u53e3\uff08\u5426\u5219\u8be5\u5916\u8bbe\u5bf9\u5e94\u7684\u8f93\u5165\u8f93\u51fa\u7ba1\u811a\u53ef\u4ee5\u505a\u666e\u901aGPIO\u7ba1\u811a\u4f7f\u7528\uff09\uff1b\u2463\u518d\u5bf9\u5916\u8bbe\u8fdb\u884c\u8be6\u7ec6\u914d\u7f6e\u3002<\/p>\n
\n\t\u5bf9\u5e94\u5230\u5916\u8bbe\u7684\u8f93\u5165\u8f93\u51fa\u529f\u80fd\u6709\u4e0b\u8ff0\u4e09\u79cd\u60c5\u51b5\uff1a<\/p>\n
\n\t\u2460\u5916\u8bbe\u5bf9\u5e94\u7684\u7ba1\u811a\u4e3a\u8f93\u51fa\uff1a\u9700\u8981\u6839\u636e\u5916\u56f4\u7535\u8def\u7684\u914d\u7f6e\u9009\u62e9\u5bf9\u5e94\u7684\u7ba1\u811a\u4e3a\u590d\u7528\u529f\u80fd\u7684\u63a8\u633d\u8f93\u51fa\u6216\u590d\u7528\u529f\u80fd\u7684\u5f00\u6f0f\u8f93\u51fa\u3002<\/p>\n
\n\t\u2461\u5916\u8bbe\u5bf9\u5e94\u7684\u7ba1\u811a\u4e3a\u8f93\u5165\uff1a\u5219\u6839\u636e\u5916\u56f4\u7535\u8def\u7684\u914d\u7f6e\u53ef\u4ee5\u9009\u62e9\u6d6e\u7a7a\u8f93\u5165\u3001\u5e26\u4e0a\u62c9\u8f93\u5165\u6216\u5e26\u4e0b\u62c9\u8f93\u5165\u3002<\/p>\n
\n\t\u2462ADC\u5bf9\u5e94\u7684\u7ba1\u811a\uff1a\u914d\u7f6e\u7ba1\u811a\u4e3a\u6a21\u62df\u8f93\u5165\u3002<\/p>\n
\n\t\u5982\u679c\u628a\u7aef\u53e3\u914d\u7f6e\u6210\u590d\u7528\u8f93\u51fa\u529f\u80fd\uff0c\u5219\u5f15\u811a\u548c\u8f93\u51fa\u5bc4\u5b58\u5668\u65ad\u5f00\uff0c\u5e76\u548c\u7247\u4e0a\u5916\u8bbe\u7684\u8f93\u51fa\u4fe1\u53f7\u8fde\u63a5\u3002\u5c06\u7ba1\u811a\u914d\u7f6e\u6210\u590d\u7528\u8f93\u51fa\u529f\u80fd\u540e\uff0c\u5982\u679c\u5916\u8bbe\u6ca1\u6709\u88ab\u6fc0\u6d3b\uff0c\u90a3\u4e48\u5b83\u7684\u8f93\u51fa\u5c06\u4e0d\u786e\u5b9a\u3002<\/p>\n
\n\t\uff08\u4e09\uff09 \u901a\u7528IO\u7aef\u53e3\uff08GPIO\uff09\u521d\u59cb\u5316\uff1a<\/p>\n
\n\t1\u3001 RCC_APB2PeriphClockCmd\uff08RCC_APB2Periph_GPIOA | B | C\uff0c ENABLE\uff09\uff1a\u4f7f\u80fdAPB2\u603b\u7ebf\u5916\u8bbe\u65f6\u949f\uff1b<\/p>\n
\n\t2 \u3001RCC_ APB2PeriphResetCmd \uff08RCC_APB2Periph_GPIOA | B | C\uff0c DISABLE\uff09\uff1a\u91ca\u653eGPIO\u590d\u4f4d\uff1b<\/p>\n
\n\t3\u3001\u914d\u7f6e\u5404\u4e2aPIN\u7aef\u53e3\uff08\u6a21\u62df\u8f93\u5165_AIN\u3001\u8f93\u5165\u6d6e\u7a7a_IN_FLOATING\u3001\u8f93\u5165\u4e0a\u62c9_IPU\u3001\u8f93\u5165\u4e0b\u62c9_IPD\u3001\u5f00\u6f0f\u8f93\u51fa_OUT_OD\u3001\u63a8\u633d\u5f0f\u8f93\u51fa_OUT_PP\u3001\u63a8\u633d\u5f0f\u590d\u7528\u8f93\u51fa_AF_PP\u3001\u5f00\u6f0f\u590d\u7528\u8f93\u51fa_AF_OD\uff09\u548c\u5339\u914d\u901f\u5ea6\u3002<\/p>\n
\n\t4 \u3001GPIO\u521d\u59cb\u5316\u5b8c\u6210<\/p>\n
\n\t\u9644\u6ce81\uff1aPLL\uff08Phase Locked Loop\uff09\uff1a \u4e3a\u9501\u76f8\u56de\u8def\u6216\u9501\u76f8\u73af<\/u>\uff0c\u7528\u6765\u7edf\u4e00\u6574\u5408\u65f6\u8109\u8baf\u53f7\uff0c\u4f7f\u5185\u5b58\u80fd\u6b63\u786e\u7684\u5b58\u53d6\u8d44\u6599\u3002PLL\u7528\u4e8e\u632f\u8361\u5668<\/u>\u4e2d\u7684\u53cd\u9988\u6280\u672f\u3002\u8bb8\u591a\u7535\u5b50\u8bbe\u5907\u8981\u6b63\u5e38\u5de5\u4f5c\uff0c\u901a\u5e38\u9700\u8981\u5916\u90e8\u7684\u8f93\u5165\u4fe1\u53f7\u4e0e\u5185\u90e8\u7684\u632f\u8361\u4fe1\u53f7\u540c\u6b65\uff0c\u5229\u7528\u9501\u76f8\u73af\u8def\u5c31\u53ef\u4ee5\u5b9e\u73b0\u8fd9\u4e2a\u76ee\u7684\u3002<\/p>\n
\n\t\u9644\u6ce82\uff1aSTM32\u7684GPIO\u53e3\u7684\u8f93\u51fa\uff1a\u5f00\u6f0f\u8f93\u51fa\u548c\u63a8\u633d\u8f93\u51fa<\/p>\n
\n\t1\u3001\u63a8\u633d\u8f93\u51fa\u4e0e\u5f00\u6f0f\u8f93\u51fa\u7684\u533a\u522b\uff1a<\/p>\n
\n\t\u300b\u300b\u63a8\u633d\u8f93\u51fa\uff1a\u53ef\u4ee5\u8f93\u51fa\u9ad8\uff0c\u4f4e\u7535\u5e73\uff0c\u8fde\u63a5\u6570\u5b57\u5668\u4ef6<\/p>\n
\n\t\u300b\u300b\u5f00\u6f0f\u8f93\u51fa\uff1a\u8f93\u51fa\u7aef\u76f8\u5f53\u4e8e\u4e09\u6781\u7ba1<\/u>\u7684\u96c6\u7535\u6781\u3002 \u8981\u5f97\u5230\u9ad8\u7535\u5e73\u72b6\u6001\u9700\u8981\u4e0a\u62c9\u7535\u963b\u624d\u884c\u3002 \u9002\u5408\u4e8e\u505a\u7535\u6d41\u578b\u7684\u9a71\u52a8\uff0c\u5176\u5438\u6536\u7535\u6d41\u7684\u80fd\u529b\u76f8\u5bf9\u5f3a\uff08\u4e00\u822c20ma\u4ee5\u5185\uff09\u3002<\/p>\n
\n\t\u63a8\u633d\u7ed3\u6784\u4e00\u822c\u662f\u6307\u4e24\u4e2a\u4e09\u6781\u7ba1\u5206\u522b\u53d7\u4e24\u4e92\u8865\u4fe1\u53f7\u7684\u63a7\u5236\uff0c\u603b\u662f\u5728\u4e00\u4e2a\u4e09\u6781\u7ba1\u5bfc\u901a\u7684\u65f6\u5019\u53e6\u4e00\u4e2a\u622a\u6b62\u3002<\/p>\n
\n\t\u8981\u5b9e\u73b0 \u7ebf\u4e0e \u9700\u8981\u7528OC\uff08open collector\uff09\u95e8\u7535\u8def\u3002\u662f\u4e24\u4e2a\u53c2\u6570\u76f8\u540c\u7684\u4e09\u6781\u7ba1\u6216MOSFET<\/u>\uff0c\u4ee5\u63a8\u633d\u65b9\u5f0f\u5b58\u5728\u4e8e\u7535\u8def\u4e2d\uff0c\u5404\u8d1f\u8d23\u6b63\u8d1f\u534a\u5468\u7684\u6ce2\u5f62\u653e\u5927\u4efb\u52a1\uff0c\u7535\u8def\u5de5\u4f5c\u65f6\uff0c\u4e24\u53ea\u5bf9\u79f0\u7684\u529f\u7387\u5f00\u5173<\/u>\u7ba1\u6bcf\u6b21\u53ea\u6709\u4e00\u4e2a\u5bfc\u901a\uff0c\u6240\u4ee5\u5bfc\u901a\u635f\u8017\u5c0f\uff0c\u6548\u7387\u9ad8\u3002\u8f93\u51fa\u65e2\u53ef\u4ee5\u5411\u8d1f\u8f7d\u704c\u7535\u6d41\uff0c\u4e5f\u53ef\u4ee5\u4ece\u8d1f\u8f7d\u62bd\u53d6\u7535\u6d41\u3002<\/p>\n
\n\t\u5f53\u7aef\u53e3\u914d\u7f6e\u4e3a\u8f93\u51fa\u65f6\uff1a<\/p>\n
\n\t\u5f00\u6f0f\u6a21\u5f0f\uff1a\u8f93\u51fa 0 \u65f6\uff0cN-MOS \u5bfc\u901a\uff0cP-MOS \u4e0d\u88ab\u6fc0\u6d3b\uff0c\u8f93\u51fa0\u3002<\/p>\n
\n\t\u8f93\u51fa 1 \u65f6\uff0cN-MOS \u9ad8\u963b\uff0c P-MOS \u4e0d\u88ab\u6fc0\u6d3b\uff0c\u8f93\u51fa1\uff08\u9700\u8981\u5916\u90e8\u4e0a\u62c9\u7535\u8def\uff09\uff0c\u4e5f\u5c31\u662f\u8bf4\u6b64\u6a21\u5f0f\u4e0b\u53ea\u6709 N-MOS\u5bf9\u8f93\u51fa\u8d77\u4f5c\u7528\uff1b\u6b64\u6a21\u5f0f\u53ef\u4ee5\u628a\u7aef\u53e3\u4f5c\u4e3a\u53cc\u5411IO\u4f7f\u7528\u3002<\/p>\n
\n\t\u63a8\u633d\u6a21\u5f0f\uff1a\u8f93\u51fa 0 \u65f6\uff0cN-MOS \u5bfc\u901a\uff0cP-MOS \u9ad8\u963b\uff0c\u8f93\u51fa0\u3002<\/p>\n
\n\t\u8f93\u51fa 1 \u65f6\uff0cN-MOS \u9ad8\u963b\uff0cP-MOS \u5bfc\u901a\uff0c\u8f93\u51fa1\uff08\u4e0d\u9700\u8981\u5916\u90e8\u4e0a\u62c9\u7535\u8def\uff09\u3002<\/p>\n
\n\t\u7b80\u5355\u6765\u8bf4\uff0c\u5f00\u6f0f\u662f0\u7684\u65f6\u5019\u63a5GND \uff0c1\u7684\u65f6\u5019\u6d6e\u7a7a\uff1b\u63a8\u633d\u662f0\u7684\u65f6\u5019\u63a5GND \uff0c1\u7684\u65f6\u5019\u63a5VCC\u3002<\/p>\n
\n\t2\u3001\u5f00\u6f0f\u7535\u8def\u7279\u70b9\u53ca\u5e94\u7528<\/p>\n
\n\t\u5728\u7535\u8def\u8bbe\u8ba1\u65f6<\/u>\u6211\u4eec\u5e38\u5e38\u9047\u5230\u5f00\u6f0f\uff08open drain\uff09\u548c\u5f00\u96c6\uff08open collector\uff09\u7684\u6982\u5ff5\u3002\u6240\u8c13\u5f00\u6f0f\u7535\u8def\u6982\u5ff5\u4e2d\u63d0\u5230\u7684“\u6f0f”\u5c31\u662f\u6307MOSFET\u7684\u6f0f\u6781\u3002\u540c\u7406\uff0c\u5f00\u96c6\u7535\u8def\u4e2d\u7684“\u96c6”\u5c31\u662f\u6307\u4e09\u6781\u7ba1\u7684\u96c6\u7535\u6781\u3002\u5f00\u6f0f\u7535\u8def\u5c31\u662f\u6307\u4ee5MOSFET\u7684\u6f0f\u6781\u4e3a\u8f93\u51fa\u7684\u7535\u8def\u3002\u4e00\u822c\u7684\u7528\u6cd5\u662f\u4f1a\u5728\u6f0f\u6781\u5916\u90e8\u7684\u7535\u8def\u6dfb\u52a0\u4e0a\u62c9\u7535\u963b\u3002\u5b8c\u6574\u7684\u5f00\u6f0f\u7535\u8def\u5e94\u8be5\u7531\u5f00\u6f0f\u5668\u4ef6\u548c\u5f00\u6f0f\u4e0a\u62c9\u7535\u963b\u7ec4\u6210\u3002<\/p>\n
\n\t\u7ec4\u6210\u5f00\u6f0f\u5f62\u5f0f\u7684\u7535\u8def\u6709\u4ee5\u4e0b\u51e0\u4e2a\u7279\u70b9\uff1a<\/p>\n
\n\t1\uff09 \u5229\u7528 \u5916\u90e8\u7535\u8def\u7684\u9a71\u52a8\u80fd\u529b\uff0c\u51cf\u5c11IC\u5185\u90e8\u7684\u9a71\u52a8\u3002\u5f53IC\u5185\u90e8MOSFET\u5bfc\u901a\u65f6\uff0c\u9a71\u52a8\u7535\u6d41\u662f\u4ece\u5916\u90e8\u7684VCC\u6d41\u7ecfR pull-up \uff0cMOSFET\u5230GND\u3002IC\u5185\u90e8\u4ec5\u9700\u5f88\u4e0b\u7684\u6805\u6781\u9a71\u52a8\u7535\u6d41\u3002<\/p>\n
\n\t2\uff09 \u53ef\u4ee5\u5c06\u591a\u4e2a\u5f00\u6f0f\u8f93\u51fa\u7684Pin\uff0c\u8fde\u63a5\u5230\u4e00\u6761\u7ebf\u4e0a\u3002\u5f62\u6210 “\u4e0e\u903b\u8f91” \u5173\u7cfb\u3002\u5f53PIN_A\u3001PIN_B\u3001PIN_C\u4efb\u610f\u4e00\u4e2a\u53d8\u4f4e\u540e\uff0c\u5f00\u6f0f\u7ebf\u4e0a\u7684\u903b\u8f91\u5c31\u4e3a0\u4e86\u3002\u8fd9\u4e5f\u662fI2C\uff0cSMBus\u7b49\u603b\u7ebf\u5224\u65ad\u603b\u7ebf\u5360\u7528\u72b6\u6001\u7684\u539f\u7406\u3002<\/p>\n
\n\t3\uff09\u53ef\u4ee5\u5229\u7528\u6539\u53d8\u4e0a\u62c9\u7535\u6e90\u7684\u7535\u538b\uff0c\u6539\u53d8\u4f20\u8f93\u7535\u5e73\u3002IC\u7684\u903b\u8f91\u7535\u5e73\u7531\u7535\u6e90Vcc1\u51b3\u5b9a\uff0c\u800c\u8f93\u51fa\u9ad8\u7535\u5e73\u5219\u7531Vcc2\u51b3\u5b9a\u3002\u8fd9\u6837\u6211\u4eec\u5c31\u53ef\u4ee5\u7528\u4f4e\u7535\u5e73\u903b\u8f91\u63a7\u5236\u8f93\u51fa\u9ad8\u7535\u5e73\u903b\u8f91\u4e86\u3002<\/p>\n
\n\t4\uff09\u5f00\u6f0fPin\u4e0d\u8fde\u63a5\u5916\u90e8\u7684\u4e0a\u62c9\u7535\u963b\uff0c\u5219\u53ea\u80fd\u8f93\u51fa\u4f4e\u7535\u5e73\uff08\u56e0\u6b64\u5bf9\u4e8e\u7ecf\u5178\u768451\u5355\u7247\u673a<\/u>\u7684P0\u53e3\u800c\u8a00\uff0c\u8981\u60f3\u505a\u8f93\u5165\u8f93\u51fa\u529f\u80fd\u5fc5\u987b\u52a0\u5916\u90e8\u4e0a\u62c9\u7535\u963b\uff0c\u5426\u5219\u65e0\u6cd5\u8f93\u51fa\u9ad8\u7535\u5e73\u903b\u8f91\uff09\u3002<\/p>\n
\n\t5\uff09\u6807\u51c6\u7684\u5f00\u6f0f\u811a\u4e00\u822c\u53ea\u6709\u8f93\u51fa\u7684\u80fd\u529b\u3002\u6dfb\u52a0\u5176\u5b83\u7684\u5224\u65ad\u7535\u8def\uff0c\u624d\u80fd\u5177\u5907\u53cc\u5411\u8f93\u5165\u3001\u8f93\u51fa\u7684\u80fd\u529b\u3002<\/p>\n
\n\t\u5e94\u7528\u4e2d\u9700\u6ce8\u610f\uff1a<\/p>\n
\n\t1\uff09 \u5f00\u6f0f\u548c\u5f00\u96c6\u7684\u539f\u7406\u7c7b\u4f3c\uff0c\u5728\u8bb8\u591a\u5e94\u7528\u4e2d\u6211\u4eec\u5229\u7528\u5f00\u96c6\u7535\u8def\u4ee3\u66ff\u5f00\u6f0f\u7535\u8def\u3002\u4f8b\u5982\uff0c\u67d0\u8f93\u5165Pin\u8981\u6c42\u7531\u5f00\u6f0f\u7535\u8def\u9a71\u52a8\u3002\u5219\u6211\u4eec\u5e38\u89c1\u7684\u9a71\u52a8\u65b9\u5f0f\u662f\u5229\u7528\u4e00\u4e2a\u4e09\u6781\u7ba1\u7ec4\u6210\u5f00\u96c6\u7535\u8def\u6765\u9a71\u52a8\u5b83\uff0c\u5373\u65b9\u4fbf\u53c8\u8282\u7701\u6210\u672c\u3002<\/p>\n
\n\t2\uff09\u4e0a\u62c9\u7535\u963bR pull-up\u7684 \u963b\u503c \u51b3\u5b9a\u4e86 \u903b\u8f91\u7535\u5e73\u8f6c\u6362\u7684\u6cbf\u7684\u901f\u5ea6 \u3002\u963b\u503c\u8d8a\u5927\uff0c\u901f\u5ea6\u8d8a\u4f4e\u529f\u8017\u8d8a\u5c0f\u3002\u53cd\u4e4b\u4ea6\u7136\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e00\u3001G PI O\u7684\u7efc\u5408\u63cf\u8ff0 stm32 \u6bcf\u4e00\u4e2aGPIO\u7aef\u53e3\u62e5\u67092\u4e2a32bits\u7684configura ti on \u5bc4\u5b58\u5668 \uff08GPIOx_CRL\uff0cGPIOx_CRH\uff09\uff0c2\u4e2a32bits\u7684\u6570\u636e\u5bc4\u5b58\u5668\uff08GPIOx_IDR\uff0cGPIOx_ODR\uff09\uff0c1\u4e2a32bits\u7684set\/reset\u5bc4\u5b58\u5668\uff08GPIOx_BSRR\uff09\uff0c1\u4e2a<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"_links":{"self":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/posts\/2873"}],"collection":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2873"}],"version-history":[{"count":0,"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/posts\/2873\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2873"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2873"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2873"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}