timor2542

[4 DOF Robot Arm Keyestudio][Lab 01][AX-TinySAM] I2C Address Scanner

Aug 3rd, 2021
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  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. //    https://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(115200);
  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. }
  84.  
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