47 lines
1.0 KiB
C++
47 lines
1.0 KiB
C++
/*************************** I2C scan function **********************************/
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#ifdef SERIAL_DEBUG
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void I2Cscan()
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{
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// scan for i2c devices
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byte error, address;
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int nDevices;
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Serial.println(F("Scanning..."));
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nDevices = 0;
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for (address = 1; address < 127; address++ )
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{
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// The i2c_scanner uses the return value of
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// the Write.endTransmisstion to see if
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// a device did acknowledge to the address.
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Wire.beginTransmission(address);
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error = Wire.endTransmission();
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if (error == 0)
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{
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Serial.print(F("I2C device found at address 0x"));
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if (address < 16)
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Serial.print(F("0"));
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Serial.print(address, HEX);
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Serial.println(F(" !"));
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nDevices++;
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}
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else if (error == 4)
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{
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Serial.print(F("Unknown error at address 0x"));
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if (address < 16)
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Serial.print(F("0"));
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Serial.println(address, HEX);
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}
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}
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if (nDevices == 0)
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Serial.println(F("No I2C devices found\n"));
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else
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Serial.println(F("done\n"));
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}
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#endif
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