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package com.diozero.devices;
/*-
* #%L
* Organisation: diozero
* Project: diozero - Core
* Filename: LM73.java
*
* This file is part of the diozero project. More information about this project
* can be found at https://www.diozero.com/.
* %%
* Copyright (C) 2016 - 2021 diozero
* %%
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
* #L%
*/
import org.tinylog.Logger;
import com.diozero.api.I2CDevice;
import com.diozero.api.RuntimeIOException;
import com.diozero.util.BitManipulation;
public class LM73 implements ThermometerInterface {
public static enum Configuration {
LM73_0_ADDRESS_PIN_FLOAT(0x48),
LM73_0_ADDRESS_PIN_GROUND(0x49),
LM73_0_ADDRESS_PIN_VDD(0x4a),
LM73_1_ADDRESS_PIN_FLOAT(0x4c),
LM73_1_ADDRESS_PIN_GROUND(0x4d),
LM73_1_ADDRESS_PIN_VDD(0x4e);
private int address;
private Configuration(int address) {
this.address = address;
}
public int getAddress() {
return address;
}
}
// Temperature resolutions
public static enum Resolution {
RES_11_BIT(0b00),
RES_12_BIT(0b01),
RES_13_BIT(0b10),
RES_14_BIT(0b11);
private static final byte CLEAR_MASK = (byte) 0b10011111;
private byte mask;
private Resolution(int value) {
this.mask = (byte) (value << 5);
}
public byte getMask() {
return mask;
}
public byte getValue(byte currentValue) {
return (byte) ((currentValue &= CLEAR_MASK) | mask);
}
}
// Registers (p17)
private static final int TEMPERATURE_REG = 0b000;
private static final int CONFIG_REG = 0b001;
private static final int UPPER_LIMIT_TEMP_REG = 0b010;
private static final int LOWER_LIMIT_TEMP_REG = 0b011;
private static final int CTRL_STATUS_REG = 0b100;
private static final int ID_REG = 0b111;
// Control/Status register bits
private static final byte CONTROL_DATA_AVAILABLE_BIT = 0;
private static final byte TEMP_LOW_BIT = 1;
private static final byte TEMP_HIGH_BIT = 2;
private static final byte ALERT_STATUS_BIT = 3;
private static final byte TIMEOUT_DISABLE_BIT = 7;
//private static final byte LM73_BIT_STATUS = 0x0F;
// Configuration register bits
private static final byte ONE_SHOT_BIT = 2;
private static final byte ALERT_RESET_BIT = 3;
private static final byte ALERT_POLARITY_BIT = 4;
private static final byte ALERT_ENABLE_BIT = 5;
private static final byte POWER_DOWN_BIT = 7;
private static final int LM73_ID = 0x190;
// p19 states that the reset state is 0x08
private static final Resolution DEFAULT_RESOLUTION = Resolution.RES_11_BIT;
private static final float RANGE = 128f;
private I2CDevice device;
private Configuration config;
private Resolution resolution;
public LM73(int controller, Configuration config) {
this.config = config;
resolution = DEFAULT_RESOLUTION;
device = I2CDevice.builder(config.getAddress()).setController(controller).build();
int id = device.readUShort(ID_REG);
if (id != LM73_ID) {
Logger.warn("Expected device id 0x{}, got 0x{}", Integer.toHexString(LM73_ID), Integer.toHexString(id));
}
}
@Override
public void close() {
device.close();
}
public Configuration getConfiguration() {
return config;
}
public Resolution getResolution() {
return resolution;
}
public void setResolution(Resolution resolution) {
byte value = device.readByteData(CTRL_STATUS_REG);
device.writeByteData(CTRL_STATUS_REG, resolution.getValue(value));
}
public void setPower(boolean on) {
device.writeBit(CONFIG_REG, POWER_DOWN_BIT, !on);
// TODO Wait for the specified maximum conversion time
}
public boolean isDataAvailable() {
return BitManipulation.isBitSet(device.readByteData(CTRL_STATUS_REG), CONTROL_DATA_AVAILABLE_BIT);
}
@Override
public float getTemperature() throws RuntimeIOException {
return device.readShort(TEMPERATURE_REG) / RANGE;
}
public float oneShotRead() {
// Assumes the device is powered down
device.writeBit(CONFIG_REG, ONE_SHOT_BIT, true);
while (! isDataAvailable()) {
// TODO Wait the required number of ms with a timeout
}
return getTemperature();
}
public static void main(String[] args) {
// FIXME Remove this temperature conversion test code
short raw;
float expected, actual;
float range = 128f;
raw = 0x4b00;
expected = 150;
actual = raw / range;
System.out.format("raw: 0x%02x, expected: %.5f, actual: %.5f%n", Integer.valueOf(raw & 0xffff),
Float.valueOf(expected), Float.valueOf(actual));
raw = 0x0c80;
expected = 25;
actual = raw / range;
System.out.format("raw: 0x%02x, expected: %.5f, actual: %.5f%n", Integer.valueOf(raw & 0xffff),
Float.valueOf(expected), Float.valueOf(actual));
raw = 0x0080;
expected = 1;
actual = raw / range;
System.out.format("raw: 0x%02x, expected: %.5f, actual: %.5f%n", Integer.valueOf(raw & 0xffff),
Float.valueOf(expected), Float.valueOf(actual));
raw = 0x0020;
expected = 0.25f;
actual = raw / range;
System.out.format("raw: 0x%02x, expected: %.5f, actual: %.5f%n", Integer.valueOf(raw & 0xffff),
Float.valueOf(expected), Float.valueOf(actual));
raw = 0x0010;
expected = 0.125f;
actual = raw / range;
System.out.format("raw: 0x%02x, expected: %.5f, actual: %.5f%n", Integer.valueOf(raw & 0xffff),
Float.valueOf(expected), Float.valueOf(actual));
raw = 0x0008;
expected = 0.0625f;
actual = raw / range;
System.out.format("raw: 0x%02x, expected: %.5f, actual: %.5f%n", Integer.valueOf(raw & 0xffff),
Float.valueOf(expected), Float.valueOf(actual));
raw = 0x0004;
expected = 0.03125f;
actual = raw / range;
System.out.format("raw: 0x%02x, expected: %.5f, actual: %.5f%n", Integer.valueOf(raw & 0xffff),
Float.valueOf(expected), Float.valueOf(actual));
raw = 0x0000;
expected = 0;
actual = raw / range;
System.out.format("raw: 0x%02x, expected: %.5f, actual: %.5f%n", Integer.valueOf(raw & 0xffff),
Float.valueOf(expected), Float.valueOf(actual));
raw = (short) 0xfffc;
expected = -0.03125f;
actual = raw / range;
System.out.format("raw: 0x%02x, expected: %.5f, actual: %.5f%n", Integer.valueOf(raw & 0xffff),
Float.valueOf(expected), Float.valueOf(actual));
raw = (short) 0xfff8;
expected = -0.0625f;
actual = raw / range;
System.out.format("raw: 0x%02x, expected: %.5f, actual: %.5f%n", Integer.valueOf(raw & 0xffff),
Float.valueOf(expected), Float.valueOf(actual));
raw = (short) 0xfff0;
expected = -0.125f;
actual = raw / range;
System.out.format("raw: 0x%02x, expected: %.5f, actual: %.5f%n", Integer.valueOf(raw & 0xffff),
Float.valueOf(expected), Float.valueOf(actual));
raw = (short) 0xffe0;
expected = -0.25f;
actual = raw / range;
System.out.format("raw: 0x%02x, expected: %.5f, actual: %.5f%n", Integer.valueOf(raw & 0xffff),
Float.valueOf(expected), Float.valueOf(actual));
raw = (short) 0xff80;
expected = -1f;
actual = raw / range;
System.out.format("raw: 0x%02x, expected: %.5f, actual: %.5f%n", Integer.valueOf(raw & 0xffff),
Float.valueOf(expected), Float.valueOf(actual));
raw = (short) 0xf380;
expected = -25;
actual = raw / range;
System.out.format("raw: 0x%02x, expected: %.5f, actual: %.5f%n", Integer.valueOf(raw & 0xffff),
Float.valueOf(expected), Float.valueOf(actual));
raw = (short) 0xec00;
expected = -40;
actual = raw / range;
System.out.format("raw: 0x%02x, expected: %.5f, actual: %.5f%n", Integer.valueOf(raw & 0xffff),
Float.valueOf(expected), Float.valueOf(actual));
}
}
