i2c-laitteen osoite skannerin koodi

[matpi]

Jos olet epävarma, mikä on käyttämäsi i2c-laitteen tunnistus osoite, niin voit käyttää seuraavaa ohjelmaa:

// -------------------------------------- // i2c_scanner // // Version 1 // This program (or code that looks like it) // can be found in many places. // For example on the Arduino.cc forum. // The original author is not know. // Version 2, Juni 2012, Using Arduino 1.0.1 // Adapted to be as simple as possible by Arduino.cc user Krodal // Version 3, Feb 26 2013 // V3 by louarnold // Version 4, March 3, 2013, Using Arduino 1.0.3 // by Arduino.cc user Krodal. // Changes by louarnold removed. // Scanning addresses changed from 0...127 to 1...119, // according to the i2c scanner by Nick Gammon // http://www.gammon.com.au/forum/?id=10896 // Version 5, March 28, 2013 // As version 4, but address scans now to 127. // A sensor seems to use address 120. // // // This sketch tests the standard 7-bit addresses // Devices with higher bit address might not be seen properly. //

#include <Wire.h>

void setup()
{
Wire.begin();

Serial.begin(9600);
Serial.println("\nI2C Scanner");
}

void loop()
{
byte error, address;
int nDevices;

Serial.println("Scanning...");

nDevices = 0;
for(address = 1; address < 127; address++ ) 
{
// The i2c_scanner uses the return value of
// the Write.endTransmisstion to see if
// a device did acknowledge to the address.
Wire.beginTransmission(address);
error = Wire.endTransmission();

if (error == 0)
{
Serial.print("I2C device found at address 0x");
if (address<16) 
Serial.print("0");
Serial.print(address,HEX);
Serial.println("  !");

nDevices++;
}
else if (error==4) 
{
Serial.print("Unknow error at address 0x");
if (address<16) 
Serial.print("0");
Serial.println(address,HEX);
}    
}
if (nDevices == 0)
Serial.println("No I2C devices found\n");
else
Serial.println("done\n");

delay(5000);           // wait 5 seconds for next scan
}