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为什么我的UNO模拟端口在0输入时会产生一个正弦信号？
- 2015-12-02
const int sigin = 2; const int ledPin = 2; // the pin that the LED is attached to int sig_sensor; int sig_close; void setup() { Serial.begin(9600); //initialisation of the port pinMode(sigin, INPUT); pinMode(ledPin, OUTPUT); } void loop() { sig_sensor = analogRead(sigin); Serial.write(sig_sensor); //sending of the number delay(50); //wait 0.1 second // read the most recent byte (which will be from 0 to 255): // check if data has been sent from the computer: if (Serial.available()) { sig_close = Serial.read(); //sigout = map(sig_close,-50,50,-512,512); // set the brightness of the LED: digitalWrite(ledPin, sig_close); //delay(5000); //digitalWrite(ledPin, 0); } }
为什么我的UNO模拟端口在0输入时会产生一个正弦信号？
- 2015-12-02
const int sigin = 2; const int ledPin = 2; // the pin that the LED is attached to int sig_sensor; int sig_close; void setup() { Serial.begin(9600); //initialisation of the port pinMode(sigin, INPUT); pinMode(ledPin, OUTPUT); } void loop() { sig_sensor = analogRead(sigin); Serial.write(sig_sensor); //sending of the number delay(50); //wait 0.1 second // read the most recent byte (which will be from 0 to 255): // check if data has been sent from the computer: if (Serial.available()) { sig_close = Serial.read(); //sigout = map(sig_close,-50,50,-512,512); // set the brightness of the LED: digitalWrite(ledPin, sig_close); //delay(5000); //digitalWrite(ledPin, 0); } }