compilation_mpu_ping.ino

#include<Wire.h>
const int MPU_addr=0x68;  // I2C address of the MPU-6050
int16_t AcX,AcY,AcZ,Tmp,GyX,GyY,GyZ;
const int out=12;
const int in=13;
void setup(){
  Wire.begin();
  Wire.beginTransmission(MPU_addr);
  Wire.write(0x6B);  // PWR_MGMT_1 register
  Wire.write(0);     // set to zero (wakes up the MPU-6050)
  Wire.endTransmission(true);
  Serial.begin(9600);
  pinMode(out,OUTPUT);
  pinMode(in,INPUT);
}
void loop (){
  long dur;
  long dis;
  Wire.beginTransmission(MPU_addr);
  Wire.write(0x3B);  // starting with register 0x3B (ACCEL_XOUT_H)
  Wire.endTransmission(false);
  Wire.requestFrom(MPU_addr,14,true);  // request a total of 14 registers

  digitalWrite(out,LOW);
  delayMicroseconds(2);

  digitalWrite(out,HIGH);
  delayMicroseconds(10);
  digitalWrite(out,LOW);
  dur=pulseIn(in,HIGH);  
  AcX=Wire.read()<<8|Wire.read();  // 0x3B (ACCEL_XOUT_H) & 0x3C (ACCEL_XOUT_L)    
  AcY=Wire.read()<<8|Wire.read();  // 0x3D (ACCEL_YOUT_H) & 0x3E (ACCEL_YOUT_L)
  AcZ=Wire.read()<<8|Wire.read();  // 0x3F (ACCEL_ZOUT_H) & 0x40 (ACCEL_ZOUT_L)
  int tAcX = AcX/16384;
  int tAcY = AcY/16384;
  int tAcZ = AcZ/16384;
  long int true_cm;

  true_cm = 2.54*dur;
  true_cm = true_cm/100;

  if(tAcX<0){
    tAcX = -tAcX;
  }
  if(tAcY<0){
    tAcY = -tAcY;
  }
  if(tAcZ<0){
    tAcZ = -tAcZ;
  }
  
  if(true_cm>50){
  Serial.println(String("away keystroke(nothing)"));
  }
  else if(true_cm<38){
  Serial.println(String("this is the base keysrokes(base)"));
  }
  else{
  Serial.println(String("this the uppermost part keysrtoke(theupper)"));
  }
  switch(tAcX){
    case 0 : 
    Serial.println("no");
    break;
    case 1 : 
    Serial.println("low");
    break;
    case 2 : 
    Serial.println("high");
    break;
  }
   switch(tAcY){
    case 0 : 
    Serial.println("no");
    break;
    case 1 : 
    Serial.println("low");
    break;
    case 2 : 
    Serial.println("high");
    break;
  }
   switch(tAcZ){
    case 0 :
    Serial.println("no");
    break;
    case 1 : 
    Serial.println("low");
    break;
    case 2 : 
    Serial.println("high");
    break;
  }
  Serial.println(String("the value was")+ true_cm);
  Serial.print("AcX = "); Serial.print(AcX);
  Serial.print(" | AcY = "); Serial.print(AcY);
  Serial.print(" | AcZ = "); Serial.print(AcZ);
  delay(3330);
  

}