51 lines
1.7 KiB
Java
51 lines
1.7 KiB
Java
package com.rusefi.can.analysis;
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import com.rusefi.can.CANPacket;
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import org.yaml.snakeyaml.Yaml;
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import java.io.File;
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import java.io.FileWriter;
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import java.io.IOException;
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import java.util.*;
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import java.util.concurrent.atomic.AtomicBoolean;
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public class ChecksumScanner {
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public static final String CHECKSUM_YAML = "checksum.yaml";
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public static void scanForChecksums(String reportDestinationFolder, List<CANPacket> packets) throws IOException {
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Map<Integer, AtomicBoolean> isChecksumMap = new HashMap<>();
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J1850_SAE_crc8_Calculator c = new J1850_SAE_crc8_Calculator();
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for (CANPacket packet : packets) {
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AtomicBoolean isChecksum = isChecksumMap.computeIfAbsent(packet.getId(), integer -> new AtomicBoolean(true));
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if (!isChecksum.get())
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continue;
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byte[] data = packet.getData();
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if (data.length != 8) {
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isChecksum.set(false);
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continue;
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}
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byte checksum = c.crc8(data, 7);
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isChecksum.set(data[7] == checksum);
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}
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List<Integer> withChecksum = new ArrayList<>();
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for (Map.Entry<Integer, AtomicBoolean> e : isChecksumMap.entrySet()) {
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if (e.getValue().get()) {
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Integer sid = e.getKey();
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System.out.println("Ends with checksum " + sid);
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withChecksum.add(sid);
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}
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}
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withChecksum.sort(Comparator.naturalOrder());
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Yaml yaml = new Yaml();
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String yamlCountersReportFileName = reportDestinationFolder + File.separator + CHECKSUM_YAML;
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System.out.println("Writing report to " + yamlCountersReportFileName);
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yaml.dump(withChecksum, new FileWriter(yamlCountersReportFileName));
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}
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}
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