sparkfun MPR121 Hook-Up Manual page 20

phoneNumber[i] = '3';
Serial.print(phoneNumber[i]);
i++;
}
else if (touchNumber == 0)
;
else
Serial.println("Only touch ONE button!");
}
}
The next section of the code simply steps through the I C communication to
read data from the MPR121 IC.
byte mpr121Read(uint8_t address)
{
byte data;
i2cSendStart();
i2cWaitForComplete();
i2cSendByte(MPR121_W); // write 0xB4
i2cWaitForComplete();
i2cSendByte(address); // write register address
i2cWaitForComplete();
i2cSendStart();
i2cSendByte(MPR121_R); // write 0xB5
i2cWaitForComplete();
i2cReceiveByte(TRUE);
i2cWaitForComplete();
data = i2cGetReceivedByte(); // Get MSB result
i2cWaitForComplete();
i2cSendStop();
cbi(TWCR, TWEN); // Disable TWI
sbi(TWCR, TWEN); // Enable TWI
return data;
}
The function
mpr121Write()
the I C process of writing commands to the MPR121 sensor. 2
is then defined, which again, steps through
2
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