标题: ARDUINO超声波检测车距 [打印本页]

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作者: gzqmx    时间: 2018-10-29 22:37
标题: ARDUINO超声波检测车距


#include <Wire.h>

#include <LiquidCrystal_I2C.h>



volatile float dist;



LiquidCrystal_I2C mylcd(0x27,16,2);

float checkdistance_4_7() {

  digitalWrite(4, LOW);

  delayMicroseconds(2);

  digitalWrite(4, HIGH);

  delayMicroseconds(10);

  digitalWrite(4, LOW);

  float distance = pulseIn(7, HIGH) / 58.00;

  delay(10);

  return distance;

}



void setup()

{

  dist = 0;

  pinMode(4, OUTPUT);

  pinMode(7, INPUT);

  mylcd.init();

  mylcd.backlight();

}



void loop()

{

  dist = checkdistance_4_7();

  if (dist < 1000) {

    mylcd.clear();

    mylcd.setCursor(0, 0);

    mylcd.print("Distance(cm):");

    mylcd.setCursor(0, 1);

    mylcd.print(dist);

    delay(1000);



  }



}

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