According to the table on page 10 of the datasheet, the address depends on
where you're connecting the A0 pin to. You have to connect it to either
GND, V+, SDA or SCL, resulting in address 0x48, 0x49, 0x4A, ox4B,
respectively.
Also note that if you're using the SparkFun breakout board for the TMP102,
you don't need external pull-ups, as they are included on the breakout
board, so your connections needs to be:
VCC <-> IOIO 3.3V
GND <-> IOIO GND
SDA <-> IOIO SDA
SCL <-> IOIO SCL
ADD0 <-> either one of the 4 pins mentioned above.
BTW, I dug up some old project I have that uses the IOIO with a TMP102.
Here's the code:
public class TMP102 {
private static final byte[] TEMP_REQUEST = {0x00};
private final TwiMaster twi_;
private final byte address_;
private final byte[] responseBuffer_ = new byte[2];
public TMP102(TwiMaster twi, byte address) {
twi_ = twi;
address_ = address;
}
public float getTemperatureKelvin()
throws ConnectionLostException, InterruptedException,
CommunicationException {
if (!twi_.writeRead(address_, false, TEMP_REQUEST, 1, responseBuffer_,
2)) {
throw new CommunicationException("I2C transaction with TMP102
failed.");
}
int temp = Unsigned.from(responseBuffer_[0]) << 8 |
Unsigned.from(responseBuffer_[1]);
temp >>= 4;
return temp / 16.f + 273.15f;
}
}
And:
public class Unsigned {
public static int from(byte b) {
return b & 0xFF;
}
public static int from(short s) {
return s & 0xFFFF;
}
}
--
You received this message because you are subscribed to the Google Groups
"ioio-users" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/ioio-users.
For more options, visit https://groups.google.com/d/optout.
