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DBC reader

This commit is contained in:
rusefillc 2022-06-20 17:29:02 -04:00
parent bdc174d57a
commit 2987f2fbea
4 changed files with 251 additions and 0 deletions
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41
src/main/java/com/rusefi/can/reader/dbc/DbcField.java Normal file
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package com.rusefi.can.reader.dbc;
public class DbcField {
private final String name;
private final int startOffset;
private final int length;
private final double mult;
public DbcField(String name, int startOffset, int length, double mult) {
this.name = name;
this.startOffset = startOffset;
this.length = length;
this.mult = mult;
}
public String getName() {
return name;
}
public int getStartOffset() {
return startOffset;
}
public int getLength() {
return length;
}
public double getMult() {
return mult;
}
@Override
public String toString() {
return "DbcField{" +
"name='" + name + '\'' +
", startOffset=" + startOffset +
", length=" + length +
", mult=" + mult +
'}';
}
}

57
src/main/java/com/rusefi/can/reader/dbc/DbcFile.java Normal file
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package com.rusefi.can.reader.dbc;
import java.io.BufferedReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class DbcFile {
public final List<DbcPacket> packets = new ArrayList<>();
public void read(BufferedReader reader) throws IOException {
DbcPacket currentState = null;
String line;
while ((line = reader.readLine()) != null) {
line = line.trim();
if (line.startsWith("BO_")) {
if (currentState != null)
this.packets.add(currentState);
line = line.replaceAll(":", "");
String[] tokens = line.split(" ");
int decId = Integer.parseInt(tokens[1]);
String name = tokens[2];
currentState = new DbcPacket(decId, name);
} else if (line.startsWith("SG_")) {
line = line.replaceAll("[|+@(,)\\[\\]]", " ");
line = line.replaceAll(" +", " ");
String[] tokens = line.split(" ");
String name = tokens[1];
int index = 1;
while (!tokens[index - 1].equals(":"))
index++;
System.out.println(line);
int startOffset;
try {
startOffset = Integer.parseInt(tokens[index]);
} catch (NumberFormatException e) {
throw new IllegalStateException("While " + line, e);
}
int length = Integer.parseInt(tokens[index + 1]);
double mult = Double.parseDouble(tokens[index + 3]);
DbcField field = new DbcField(name, startOffset, length, mult);
System.out.println("Found " + field);
currentState.add(field);
} else {
// skipping useless line
}
}
if (currentState != null)
this.packets.add(currentState);
}
}

45
src/main/java/com/rusefi/can/reader/dbc/DbcPacket.java Normal file
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package com.rusefi.can.reader.dbc;
import com.rusefi.can.reader.dbc.DbcField;
import java.util.ArrayList;
import java.util.List;
public class DbcPacket {
private final int id;
private final String name;
private final List<DbcField> fields = new ArrayList<>();
public DbcPacket(int id, String name) {
this.id = id;
this.name = name;
}
public int getId() {
return id;
}
public String getName() {
return name;
}
@Override
public String toString() {
return "DbcPacket{" +
"id=" + id +
", name='" + name + '\'' +
'}';
}
public void add(DbcField dbcField) {
fields.add(dbcField);
}
public DbcField find(String name) {
for (DbcField field : fields) {
if (field.getName().equalsIgnoreCase(name))
return field;
}
return null;
}
}

108
src/test/java/com/rusefi/can/reader/impl/ParseDBC.java Normal file
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package com.rusefi.can.reader.impl;
import com.rusefi.can.reader.dbc.DbcField;
import com.rusefi.can.reader.dbc.DbcFile;
import com.rusefi.can.reader.dbc.DbcPacket;
import org.junit.Test;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.StringReader;
import static junit.framework.TestCase.assertEquals;
public class ParseDBC {
public static final String RPM_DBC = "VERSION \"\"\n" +
"\n" +
"\n" +
"NS_ :\n" +
"\tNS_DESC_\n" +
"\tCM_\n" +
"\tBA_DEF_\n" +
"\tBA_\n" +
"\tVAL_\n" +
"\tCAT_DEF_\n" +
"\tCAT_\n" +
"\tFILTER\n" +
"\tBA_DEF_DEF_\n" +
"\tEV_DATA_\n" +
"\tENVVAR_DATA_\n" +
"\tSGTYPE_\n" +
"\tSGTYPE_VAL_\n" +
"\tBA_DEF_SGTYPE_\n" +
"\tBA_SGTYPE_\n" +
"\tSIG_TYPE_REF_\n" +
"\tVAL_TABLE_\n" +
"\tSIG_GROUP_\n" +
"\tSIG_VALTYPE_\n" +
"\tSIGTYPE_VALTYPE_\n" +
"\n" +
"BS_:\n" +
"\n" +
"BU_: XXX\n" +
"\n" +
"\n" +
"BO_ 1394 ZAS_1: 2 XXX\n" +
" SG_ Fehlerspeichereintrag__ZAS_ : 15|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Frei_ZAS_1_3 : 8|7@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Frei_ZAS_1_2 : 7|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Klemme_15_SV : 6|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Frei_ZAS_1_1 : 5|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Klemme_P__Parklichtstellung_ : 4|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Klemme_50__Starten_ : 3|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Klemme_X__Startvorgang_ : 2|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Klemme_15__Z_ndung_ein_ : 1|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ S_Kontakt__Schl_ssel_steckt_ : 0|1@1+ (1,0) [0|0] \"\" XXX\n" +
"\n" +
"BO_ 1336 Wischer_1: 2 XXX\n" +
" SG_ Blockierung_Heckwischer_erkannt : 15|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Frei_Wischer_1_2 : 12|3@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Fehlerspeichereintrag__Wischer_ : 11|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Ansteuerung_Scheibenwischer_Hec : 10|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Ansteuerung_Wascher_Heck : 9|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Scheibenwischer_Heck_eingeschal : 8|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Blockierung_Frontwischer_erkann : 7|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Frei_Wischer_1_1 : 6|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Status_Waschduesenheizung : 5|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Parklage_Frontwischer : 4|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Ansteuerung_Frontwischer_Schnel : 3|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Ansteuerung_Frontwischer_Normal : 2|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Ansteuerung_Wascher_Front : 1|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Frontwischer__eingeschaltet : 0|1@1+ (1,0) [0|0] \"\" XXX\n" +
"" +
"" +
"" +
"\n" +
"BO_ 640 Motor_1: 8 XXX\n" +
" SG_ Fahrerwunschmoment : 56|8@1+ (0.39,0) [0|99] \"MDI\" XXX\n" +
" SG_ mechanisches_Motor_Verlustmomen : 48|8@1+ (0.39,0) [0|99] \"MDI\" XXX\n" +
" SG_ Fahrpedalwert_oder_Drosselklapp : 40|8@1+ (0.4,0) [0|101.6] \"%\" XXX\n" +
" SG_ inneres_Motor_Moment_ohne_exter : 32|8@1+ (0.39,0) [0|99] \"MDI\" XXX\n" +
" SG_ RPM : 16|16@1+ (0.25,0) [0|16256] \"U/min\" XXX\n" +
" SG_ inneres_Motor_Moment : 8|8@1+ (0.39,0) [0|99] \"MDI\" XXX\n" +
" SG_ Momentenangaben_ungenau : 7|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Fehlerstatus_Getriebe_Momentene : 6|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Fehlerstatus_Brems_Momenteneing : 5|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Time_Out_Bremsen_Botschaft : 4|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Kupplungsschalter : 3|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Kickdownschalter : 2|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Fahrpedalwert_ungenau__Motor_1_ M : 1|1@1+ (1,0) [0|0] \"\" XXX\n" +
" SG_ Leergasinformation : 0|1@1+ (1,0) [0|0] \"\" XXX" +
"";
@Test
public void parse() throws IOException {
BufferedReader reader = new BufferedReader(new StringReader(RPM_DBC));
DbcFile dbc = new DbcFile();
dbc.read(reader);
assertEquals(dbc.packets.size(), 3);
DbcPacket motorPacket = dbc.packets.get(2);
assertEquals(motorPacket.getId(), 640);
DbcField rpm = motorPacket.find("RPM");
assertEquals(0.25, rpm.getMult());
}
}