com.github.pires.obd.commands.control.DtcNumberObdCommand Maven / Gradle / Ivy
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/**
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.github.pires.obd.commands.control;
import com.github.pires.obd.commands.ObdCommand;
import com.github.pires.obd.enums.AvailableCommandNames;
/**
* This command will for now read MIL (check engine light) state and number of
* diagnostic trouble codes currently flagged in the ECU.
*
* Perhaps in the future we'll extend this to read the 3rd, 4th and 5th bytes of
* the response in order to store information about the availability and
* completeness of certain on-board tests.
*/
public class DtcNumberObdCommand extends ObdCommand {
private int codeCount = 0;
private boolean milOn = false;
/**
* Default ctor.
*/
public DtcNumberObdCommand() {
super("01 01");
}
/**
* Copy ctor.
*
* @param other a {@link com.github.pires.obd.commands.control.DtcNumberObdCommand} object.
*/
public DtcNumberObdCommand(DtcNumberObdCommand other) {
super(other);
}
@Override
protected void performCalculations() {
// ignore first two bytes [hh hh] of the response
final int mil = buffer.get(2);
milOn = (mil & 0x80) == 128;
codeCount = mil & 0x7F;
}
/**
* @return a {@link java.lang.String} object.
*/
public String getFormattedResult() {
final String res = milOn ? "MIL is ON" : "MIL is OFF";
return new StringBuilder().append(res).append(codeCount).append(" codes")
.toString();
}
/**
* @return the number of trouble codes currently flaggd in the ECU.
*/
public int getTotalAvailableCodes() {
return codeCount;
}
/**
*
* @return the state of the check engine light state.
*/
public boolean getMilOn() {
return milOn;
}
@Override
public String getName() {
return AvailableCommandNames.DTC_NUMBER.getValue();
}
}