{"id":1773,"date":"2021-06-05T12:02:43","date_gmt":"2021-06-05T04:02:43","guid":{"rendered":"http:\/\/mgspace.wiki\/docs\/?post_type=docs&p=1773"},"modified":"2021-06-05T12:09:41","modified_gmt":"2021-06-05T04:09:41","slug":"%e8%be%93%e5%87%ba-output","status":"publish","type":"docs","link":"http:\/\/mgspace.wiki\/docs\/?docs=%e8%be%93%e5%87%ba-output","title":{"rendered":"\u8f93\u51fa-OUTPUT"},"content":{"rendered":"\n
\"\"<\/figure>\n\n\n\n

\u6570\u5b57\u8f93\u51fa<\/h1>\n\n\n\n


\u987e\u540d\u601d\u4e49\uff0c\u6570\u5b57\u8f93\u51fa\u5373\u4e3a\u4f7f\u5355\u7247\u673a\u8f93\u51fa\u6570\u5b57\u91cf\u2014\u2014\u9ad8\u7535\u5e73\u6216\u4f4e\u7535\u5e73\u3002\u5355\u7247\u673a\u8fdb\u884c\u6570\u5b57\u8f93\u51fa\u524d\u9700\u5148\u5bf9\u76f8\u5e94\u5f15\u811a\u8fdb\u884c\u521d\u59cb\u5316\uff1a<\/p>\n\n\n\n

void setup()\n{\n\tpinMode(8,OUTPUT); \/\/\u5c068\u53f7\u5f15\u811a\u8bbe\u7f6e\u4e3a\u8f93\u51fa\u6a21\u5f0f\n}<\/pre>\n\n\n\n

\u8be5\u90e8\u5206\u8c03\u53d6pinMode\u51fd\u6570\uff0c\u8be5\u51fd\u6570\u5165\u53e3\u53c2\u6570\u6709\u4e24\u4e2a\uff0c\u5206\u522b\u4e3a\u9700\u521d\u59cb\u5316\u7684\u5f15\u811a\u53f7\u7801\u4ee5\u53ca\u521d\u59cb\u5316\u6a21\u5f0f\uff0c\u8be5\u793a\u4f8b\u5c068\u5f15\u811a\u8bbe\u7f6e\u4e3a\u8f93\u51fa\u5f15\u811a\u3002
\u5728loop\u51fd\u6570\u4e2d\u53ef\u5bf9\u5f15\u811a\u7535\u5e73\u8fdb\u884c\u76f8\u5e94\u64cd\u4f5c\u4ee5\u8fbe\u5230\u6240\u9700\u76ee\u7684\uff1a<\/p>\n\n\n\n
void loop()\n{\n\tdigitalWrite(8,HIGH);\/\/8\u53f7\u5f15\u811a\u8f93\u51fa\u9ad8\u7535\u5e73\n\tdelay(1000);         \/\/\u5ef6\u65f61\u79d2\uff081000\u6beb\u79d2\uff09\n\tdigitalWrite(8,LOW); \/\/8\u53f7\u5f15\u811a\u8f93\u51fa\u4f4e\u7535\u5e73\n\tdelay(1000);         \/\/\u5ef6\u65f61\u79d2\n}\n<\/pre>\n\n\n\n

\u8be5\u90e8\u5206\u4ee3\u7801\u4e3a\u4f7f\u5f15\u811a\u7535\u5e73\u9ad8\u4f4e\u8f6c\u6362\u7684\u793a\u4f8b\u3002digitalWrite\u51fd\u6570\u4e3a\u8c03\u8282\u8f93\u51fa\u7535\u5e73\u7684\u51fd\u6570\uff0c\u5305\u542b\u4e24\u4e2a\u5165\u53e3\u53c2\u6570\u5373\u5f15\u811a\u5e8f\u53f7\u4e0e\u7535\u5e73\u9ad8\u4f4e\u3002delay\u51fd\u6570\u4e3a\u5ef6\u65f6\u51fd\u6570\uff0c\u4f7f\u7a0b\u5e8f\u4fdd\u6301\u539f\u6709\u72b6\u6001\u4e00\u6bb5\u65f6\u95f4\uff0c\u5165\u53e3\u53c2\u6570\u5373\u4e3a\u8be5\u6bb5\u65f6\u95f4\u957f\u77ed\uff0c\u5355\u4f4d\u4e3a\u6beb\u79d2\u3002<\/p>\n\n\n\n
\u8be5\u793a\u4f8b\u7a0b\u5e8f\u5b8c\u6574\u6f14\u793a\u4e86\u63a7\u5236arduino\u5f15\u811a\u8f93\u51fa\u9ad8\u4f4e\u7535\u5e73\u7684\u64cd\u4f5c\u3002<\/p>\n\n\n\n
\u6a21\u62df\u8f93\u51fa<\/h1>\n\n\n\n

\u6a21\u62df\u8f93\u51fa\u4e3a\u5355\u7247\u673a\u8f93\u51fa\u6a21\u62df\u91cf\uff0c\u5373PWM\u6ce2\u3002\u4e4b\u524d\u672a\u63a5\u89e6\u8fc7\u8be5\u6982\u5ff5\u7684\u670b\u53cb\u53ef\u7b80\u8981\u7406\u89e3\u4e3a\u901a\u8fc7\u6539\u53d8\u4e00\u4e2a\u5468\u671f\u5185\u9ad8\u7535\u5e73\u7684\u8f93\u51fa\u6bd4\u4f8b\uff08\u5360\u7a7a\u6bd4\uff09\u8c03\u8282\u7b49\u6548\u8f93\u51fa\u7535\u538b\u7684\u64cd\u4f5c\uff0c\u5e7f\u6cdb\u7528\u4e8e\u5355\u7247\u673a\u63a7\u5236\u7535\u673a\u8f6c\u901f\u3001\u8235\u673a\u89d2\u5ea6\u7b49\u9886\u57df\u3002
\u8be5\u90e8\u5206\u7684\u521d\u59cb\u5316\u4ee3\u7801\u4e0e\u6570\u5b57\u8f93\u51fa\u5b8c\u5168\u76f8\u540c\uff0c\u6545\u8fd9\u91cc\u4e0d\u518d\u8d58\u8ff0\uff0c\u4f46\u9700\u7279\u6b8a\u8bf4\u660e\u7684\u662f\u5e76\u975e\u6240\u6709\u5f15\u811a\u5747\u53ef\u5b8c\u6210\u6a21\u62df\u91cf\u8f93\u51fa\u7684\u64cd\u4f5c\u3002\u5728\u5355\u7247\u673a\u677f\u5b50\u4e0a\uff0c\u5f15\u811a\u53f7\u65c1\u8fb9\u6807\u6709~\u7684\u5f15\u811a\u624d\u53ef\u8f93\u51faPWM\u6ce2\uff0c\u5176\u4f59\u5747\u4e0d\u53ef\u8fdb\u884c\u6a21\u62df\u8f93\u51fa\u64cd\u4f5c\u3002<\/p>\n\n\n\n
PWM\u7684\u4ecb\u7ecd\uff1a<\/h2>\n\n\n\n
PWM\u662f\u4e00\u79cd\u8c03\u5236\u65b9\u5f0f\uff0c\u90a3\u4e48\u4e3a\u4ec0\u4e48\u4f1a\u6709\u8fd9\u79cd\u65b9\u5f0f\u5b58\u5728\uff1f\u5927\u5bb6\u53ef\u80fd\u77e5\u9053Arduino\u6709\u6a21\u62df\u8f93\u5165\u5f15\u811a\uff0c\u8fd9\u4e9b\u5f15\u811a\u662f\u901a\u8fc7A\/D\u8f6c\u6362\u64cd\u4f5c\u7684\uff0c\u800c\u4e00\u822c\u7684\u6570\u5b57\u5f15\u811a\u5374\u53ea\u80fd\u8f93\u5165HIGH\u6216LOW\u7535\u5e73\uff0c\u90a3\u4e48\u4e2d\u95f4\u7535\u5e73\u53ef\u5426\u8f93\u51fa\u5462\uff1f\u6bd4\u59822v\u7684\u7535\u5e73\u5982\u4f55\u8f93\u51fa\uff1f\u4e8e\u662fPWM\u5e94\u8fd0\u800c\u751f\u3002PWM\u7684\u9ad8\u660e\u4e4b\u5904\u5728\u4e8e\uff1a\u5b83\u8f93\u51fa\u7684\u4ecd\u7136\u662fHIGH\u6216\u8005LOW\u7535\u5e73\uff0c\u4f46\u53ef\u4ee5\u95f4\u6b47\u6027\u5468\u671f\u6027\u8f93\u51fa\uff0c\u5219\u5229\u7528\u53d6\u5e73\u5747\u503c\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u8fbe\u5230\u6ee1\u610f\u7684\u8f93\u51fa\u6548\u679c\u3002\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff1a\u57280~5s\u5185\u8f93\u51fa5v\u7684\u7535\u5e73\uff0c\u90a3\u4e480~5s\u7684\u5e73\u5747\u7535\u538b\u5c31\u662f5v\uff0c\u800c\u5018\u82e5\u6211\u57280~2.5s\u8f93\u51fa5v\uff0c\u57282.5~5s\u8f93\u51fa0v\uff08\u5360\u7a7a\u6bd450%\uff09\uff0c\u90a3\u4e48\u8fd95s\u5185\u5e73\u5747\u7535\u5e73\u5c31\u662f2.5v\uff0c\u663e\u7136\u53ef\u4ee5\u8fbe\u5230\u6211\u4eec\u60f3\u8981\u7684\u6548\u679c\u3002\u4f46\u4ecd\u6709\u95ee\u9898\uff1a\u5018\u82e5\u4f60\u7684\u5468\u671f\u5f88\u957f\uff0c\u5c31\u50cf\u4e0a\u9762\u4f8b\u5b50\u6240\u8bf4\uff0c\u5468\u671f5s\uff0c\u70b9\u4eae\u4e00\u4e2aLED\u706f\uff08LOW\u4eae\uff0cHIGH\u706d\uff09\uff0c\u90a3\u4e48LED\u706f\u663e\u7136\u662f\u524d2.5s\u706d\uff0c\u540e2.5s\u4eae\uff0c\u663e\u7136\u8fbe\u4e0d\u5230\u8c03\u706f\u6697\u4eae\u7684\u6548\u679c\u3002\u4f46\u5f53\u5468\u671f\u88ab\u7f29\u5c0f\u4e4b\u540e\u6bd4\u598220ms\uff0c\u8fd9\u65f6\u5019\u4eae\u4e0e\u706d\u53ea\u662f\u5f88\u77ed\u65f6\u95f4\u5185\u7684\u4e8b\uff0c\u8089\u773c\u6839\u672c\u770b\u4e0d\u5230\u4eae\u706d\u7684\u53d8\u5316\uff0c\u56e0\u800cLED\u706f\u8868\u73b0\u7684\u5c31\u662f\u4eae\u5ea6\u53d8\u6697\u3002\u4e8e\u662f\u6211\u4eec\u77e5\u9053\uff1aPWM\u8c03\u5236\u7684\u5468\u671f\u4e00\u822c\u6bd4\u8f83\u77ed\u3002PWM\u53ea\u662f\u7528\u6570\u5b57\u8f93\u51fa\u66ff\u4ee3\u6a21\u62df\u91cf\u8f93\u51fa\uff0c\u56e0\u6b64\u5355\u65b9\u9762\u8fd8\u662f\u4e0d\u884c\u7684\uff0c\u8fd9\u5c31\u8981\u6c42\u6211\u4eec\u7684\u8bbe\u5907\u8fd8\u8981\u652f\u6301PWM\u7684\u8c03\u5236\u3002\uff08\u6bd4\u5982\u8235\u673a\u7b49\uff09\u3002\u56e0\u800cPWM\u7684\u5468\u671f\u4e5f\u4e0d\u80fd\u4efb\u610f\u77ed\uff0c\u8fd8\u9700\u8981\u6ee1\u8db3\u6211\u4eec\u8bbe\u5907\u7684\u8c03\u5236\u8981\u6c42\u3002<\/p>\n\n\n\n

\u521d\u59cb\u5316\u6b65\u9aa4\u5b8c\u6210\u540e\uff0c\u4f7f\u5355\u7247\u673a\u8f93\u51faPWM\u6ce2\u7684\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n
void loop()\n{\n\tanalogWrite(8,200);\/\/8\u53f7\u5f15\u811a\u8f93\u51faPWM\u6ce2\n}<\/pre>\n\n\n\n

analogWrite\u51fd\u6570\u63a7\u5236\u5f15\u811a\u8f93\u51faPWM\u6ce2\uff0c\u5176\u9700\u8981\u4e24\u4e2a\u5165\u53e3\u53c2\u6570\uff0c\u7b2c\u4e00\u4e2a\u4e3a\u5f15\u811a\u53f7\u7801\uff0c\u7b2c\u4e8c\u4e2a\u4e3a\u5360\u7a7a\u6bd4\u53c2\u6570\uff0carduino\u6a21\u62df\u8f93\u51fa\u4e3a8\u4f4d\u6a21\u62df\u91cf\uff0c\u5373\u652f\u630128\u4e2a\u5360\u7a7a\u6bd4\u7c7b\u522b\uff080~254\uff09\uff0c\u53c2\u6570\u8d8a\u5927\u5360\u7a7a\u6bd4\u8d8a\u9ad8\uff0c\u4e0a\u6587\u793a\u4f8b\u4e2d\u53c2\u6570\u53d6\u503c\u4e3a200\u3002
\u638c\u63e1\u57fa\u672c\u6a21\u62df\u8f93\u51fa\u51fd\u6570\u540e\u7ed3\u5408\u7b80\u5355C\u8bed\u8a00\u8bed\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u5bf9\u5176\u8fdb\u884c\u66f4\u52a0\u590d\u6742\u7684\u64cd\u4f5c\uff1a<\/p>\n\n\n\n
void loop()\n{\n\tint t;\n\tfor(t=0;t<255;t++)\n\t{\n\t\tanalogWrite(8,t);\n\t\tdelay(5);\n\t}\n\tfor(t=255;t>-1;t--)\n\t{\n\t\tanalogWrite(8,t);\n\t\tdelay(5);\n\t}\n}<\/pre>\n\n\n\n

\u8be5\u90e8\u5206\u4ee3\u7801\u4f7f8\u53f7\u5f15\u811a\u8f93\u51fa\u5360\u7a7a\u6bd4\u5300\u901f\u53d8\u5316\u7684PWM\u6ce2\uff0c\u5360\u7a7a\u6bd4\u75310\u7f13\u6162\u589e\u5927\u81f3254\uff0c\u518d\u7531254\u51cf\u5c0f\u81f30\uff0c\u901a\u8fc7\u6539\u53d8delay\u51fd\u6570\u4e2d\u53c2\u6570\u7684\u503c\uff0c\u53ef\u52a0\u5feb\u6216\u51cf\u6162\u5360\u7a7a\u6bd4\u53d8\u5316\u901f\u5ea6\u3002<\/p>\n\n\n\n
analogWrite()\u5b9e\u73b0\u5bf9\u5f15\u811a\u8bbe\u7f6ePWM\u7684\u8981\u6c42\u3002\u53ef\u4ee5\u88ab\u7528\u6765\u63a7\u5236LED\u7b49\uff0c\u7535\u673a\u8f6c\u52a8\uff0c\u8235\u673a\u7b49\u3002\u4f7f\u7528\u6b64\u51fd\u6570\u540e\uff0c\u5f15\u811a\u4f1a\u4ea7\u751f\u7a33\u5b9a\u7684\u65b9\u6ce2\uff0c\u76f4\u5230\u4e0b\u4e00\u6b21\u5bf9\u5f15\u811a\u505a\u5176\u4ed6\u64cd\u4f5c\u3002\u5927\u591a\u6570\u5f15\u811a\u7684PWM\u9891\u7387\u5927\u7ea6\u4e3a490Hz\u3002\u5728Uno\u4ee5\u53ca\u76f8\u4f3c\u7684\u677f\u5b50\u4e0a\uff0cpin5\u548cpin6\u6709\u5927\u7ea6980Hz\u7684\u9891\u7387\u3002Leonardo\u677f\u5b50\u7684pin3\u548cpin11\u4e5f\u6709980Hz\u7684\u9891\u7387\u3002<\/p>\n\n\n\n
\u5728\u5927\u591a\u6570\u7684Arduino\u677f\u5b50\u4e0a\uff08\u7528ATmega168\u6216\u8005ATmega328\u7684\u677f\u5b50\uff09\uff0c\u5728\u5f15\u811a3,5,6,9,10\u548c11\u6709PWM\u529f\u80fd\uff1b\u5728Arduino Mega\u677f\u5b50\u4e0a\uff0c\u57282~13\u548c44~46\u5f15\u811a\u6709PWM\u529f\u80fd\u3002\u4f7f\u7528ATmega8\u7684\u8001\u677f\u5b50\u53ea\u57289\uff0c10\u548c11\u5f15\u811a\u652f\u6301analogWrite\uff08\uff09\u3002<\/p>\n\n\n\n
Arduino Due\u677f\u5b50\u57282\u523013\u5f15\u811a\u548cDAC0\uff0cDAC1\u5f15\u811a\u652f\u6301analogWrite\uff08\uff09\u3002\u4f46\u662fADC0\u548cDAC1\u662f\u91c7\u7528D\/A\u8f6c\u6362\u7684\u65b9\u5f0f\u8f93\u51fa\uff0c\u5b83\u4eec\u786e\u5b9e\u8f93\u51fa\u7684\u662f\u6a21\u62df\u91cf\u800c\u4e0d\u662f\u7531PWM\u8c03\u5236\u8f93\u51fa\u7684\u3002<\/p>\n\n\n\n
\u53e6\u5916\uff0c\u4f7f\u7528analogWrite\uff08\uff09\u4e0d\u9700\u8981\u518d\u7528pinMode\uff08\uff09\u8bbe\u7f6e\u5f15\u811a\u4e3a\u8f93\u51fa\u3002<\/p>\n\n\n\n
\u5f62\u5f0f\uff1a<\/p>\n\n\n\n
analogWrite\uff08pin,value\uff09<\/p>\n\n\n\n
\u53c2\u6570\uff1a<\/p>\n\n\n\n
pin\uff1a\u5199\u5165\u7684\u5f15\u811a\uff1b<\/p>\n\n\n\n
value\uff1a\u5360\u7a7a\u6bd4\uff0c\u57280~255\u4e4b\u95f4\u3002\uff080\u65f6\u5019\u4e3a\u5173\uff0c\u5373LOW\uff1b255\u4e3a\u5f00\uff0c\u5373HIGH\uff09<\/p>\n\n\n\n
\u8fd4\u56de\u503c:none<\/p>\n\n\n\n
\u6ce8\uff1a5pin\u548c6pin\u4ea7\u751f\u7684PWM\u8f93\u51fa\u4f1a\u6bd4\u8bbe\u7f6e\u7684\u5360\u7a7a\u6bd4\u9ad8\uff0c\u8fd9\u662f\u56e0\u4e3amillis\uff08\uff09\u548cdelay\uff08\uff09\u51fd\u6570\u4e0e\u5b83\u4eec\u4f7f\u7528\u76f8\u540c\u7684\u5185\u90e8\u65f6\u949f\u3002<\/p>\n\n\n\n
\u793a\u4f8b\uff1a<\/p>\n\n\n\n
int ledPin = 9;      \/\/ LED connected to digital pin 9\n \nint analogPin = 3;   \/\/ potentiometer connected to analog pin 3\n \nint val = 0;         \/\/ variable to store the read value\n \n \n \nvoid setup()\n \n{\n \n  pinMode(ledPin, OUTPUT);   \/\/ sets the pin as output\n \n}\n \n \n \nvoid loop()\n \n{\n \n  val = analogRead(analogPin);   \/\/ read the input pin\n \n  analogWrite(ledPin, val \/ 4);  \/\/ analogRead values go from 0 to 1023, analogWrite values from 0 to 255\n \n}\n<\/pre>\n\n\n\n
<\/p>\n\n\n\n

Reference\uff1a<\/p>\n\n\n\n
https:\/\/blog.csdn.net\/acslsr\/article\/details\/103780698<\/p>\n","protected":false},"excerpt":{"rendered":"
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