Script do i2c Arduino

I'll share an example by Dejan from HowToMechatrinics, if you need more help understanding the script, please let me know:

 

/* 

 *  How I2C Communication Protocol Works - Arduino I2C Tutorial

 */

 

#include <Wire.h>

 

int ADXLAddress = 0x53; // Device address in which is also included the 8th bit for selecting the mode, read in this case.

 

#define X_Axis_Register_DATAX0 0x32 // Hexadecima address for the DATAX0 internal register.

#define X_Axis_Register_DATAX1 0x33 // Hexadecima address for the DATAX1 internal register.

#define Power_Register 0x2D // Power Control Register

 

int X0,X1,X_out;

 

void setup() {

  Wire.begin(); // Initiate the Wire library

  Serial.begin(9600);

  delay(100);

  // Enable measurement

  Wire.beginTransmission(ADXLAddress);

  Wire.write(Power_Register);

  // Bit D3 High for measuring enable (0000 1000)

  Wire.write(8); 

  Wire.endTransmission();

}

 

void loop() {

  Wire.beginTransmission(ADXLAddress); // Begin transmission to the Sensor

  //Ask the particular registers for data

  Wire.write(X_Axis_Register_DATAX0);

  Wire.write(X_Axis_Register_DATAX1);

 

  Wire.endTransmission(); // Ends the transmission and transmits the data from the two registers

 

  Wire.requestFrom(ADXLAddress,2); // Request the transmitted two bytes from the two registers

 

  if(Wire.available()<=2) {  //

    X0 = Wire.read(); // Reads the data from the register

    X1 = Wire.read();  

  }

 

  Serial.print("X0= ");

  Serial.print(X0);

  Serial.print("   X1= ");

  Serial.println(X1);

}

 

Regards from Argentina.

Julio.