아두이노 I2C Scanner 디바이스 장치주소찾기..메가2560.

[불곰]

1. // --------------------------------------
2. // i2c_scanner
3. //
4. // Version 1
5. //    This program (or code that looks like it)
6. //    can be found in many places.
7. //    For example on the Arduino.cc forum.
8. //    The original author is not know.
9. // Version 2, Juni 2012, Using Arduino 1.0.1
10. //     Adapted to be as simple as possible by Arduino.cc user Krodal
11. // Version 3, Feb 26  2013
12. //    V3 by louarnold
13. // Version 4, March 3, 2013, Using Arduino 1.0.3
14. //    by Arduino.cc user Krodal.
15. //    Changes by louarnold removed.
16. //    Scanning addresses changed from 0...127 to 1...119,
17. //    according to the i2c scanner by Nick Gammon
18. //    http://www.gammon.com.au/forum/?id=10896
19. // Version 5, March 28, 2013
20. //    As version 4, but address scans now to 127.
21. //    A sensor seems to use address 120.
22. // Version 6, November 27, 2015.
23. //    Added waiting for the Leonardo serial communication.
24. //
25. //
26. // This sketch tests the standard 7-bit addresses
27. // Devices with higher bit address might not be seen properly.
28. //
29.  
30. #include <Wire.h>
31.  
32.  
33. void setup()
34. {
35.   Wire.begin();
36.  
37.   Serial.begin(9600);
38.   while (!Serial);             // Leonardo: wait for serial monitor
39.   Serial.println("\nI2C Scanner");
40. }
41.  
42.  
43. void loop()
44. {
45.   byte error, address;
46.   int nDevices;
47.  
48.   Serial.println("Scanning...");
49.  
50.   nDevices = 0;
51.   for(address = 1; address < 127; address++ )
52.   {
53.     // The i2c_scanner uses the return value of
54.     // the Write.endTransmisstion to see if
55.     // a device did acknowledge to the address.
56.     Wire.beginTransmission(address);
57.     error = Wire.endTransmission();
58.  
59.     if (error == 0)
60.     {
61.       Serial.print("I2C device found at address 0x");
62.       if (address<16)
63.         Serial.print("0");
64.       Serial.print(address,HEX);
65.       Serial.println("  !");
66.  
67.       nDevices++;
68.     }
69.     else if (error==4)
70.     {
71.       Serial.print("Unknown error at address 0x");
72.       if (address<16)
73.         Serial.print("0");
74.       Serial.println(address,HEX);
75.     }    
76.   }
77.   if (nDevices == 0)
78.     Serial.println("No I2C devices found\n");
79.   else
80.     Serial.println("done\n");
81.  
82.   delay(5000);           // wait 5 seconds for next scan
83. }