138 lines
4.0 KiB
Java
138 lines
4.0 KiB
Java
/* Copyright (C) 2016-2017 Carsten Pfeiffer
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This file is part of Gadgetbridge.
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Gadgetbridge is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published
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by the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Gadgetbridge is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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package nodomain.freeyourgadget.gadgetbridge.service.devices.miband2;
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import java.util.HashMap;
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import java.util.Map;
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import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
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import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
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import nodomain.freeyourgadget.gadgetbridge.util.ArrayUtils;
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import nodomain.freeyourgadget.gadgetbridge.util.CheckSums;
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public class Mi2FirmwareInfo {
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private static final byte[] FW_HEADER = new byte[]{
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(byte) 0xa3,
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(byte) 0x68,
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(byte) 0x04,
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(byte) 0x3b,
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(byte) 0x02,
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(byte) 0xdb,
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(byte) 0xc8,
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(byte) 0x58,
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(byte) 0xd0,
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(byte) 0x50,
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(byte) 0xfa,
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(byte) 0xe7,
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(byte) 0x0c,
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(byte) 0x34,
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(byte) 0xf3,
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(byte) 0xe7,
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};
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private static final int FW_HEADER_OFFSET = 0x150;
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private static final byte[] FT_HEADER = new byte[] { // HMZK font file (*.ft, *.ft.xx)
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0x48,
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0x4d,
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0x5a,
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0x4b
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};
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protected static Map<Integer,String> crcToVersion = new HashMap<>();
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static {
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// firmware
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crcToVersion.put(41899, "1.0.0.39");
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crcToVersion.put(49197, "1.0.0.53");
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crcToVersion.put(32450, "1.0.1.28");
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crcToVersion.put(51770, "1.0.1.34");
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crcToVersion.put(3929, "1.0.1.39");
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// fonts
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crcToVersion.put(45624, "Font");
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crcToVersion.put(6377, "Font (En)");
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}
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private FirmwareType firmwareType = FirmwareType.FIRMWARE;
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public static String toVersion(int crc16) {
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return crcToVersion.get(crc16);
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}
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public static int[] getWhitelistedVersions() {
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return ArrayUtils.toIntArray(crcToVersion.keySet());
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}
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private final int crc16;
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private byte[] bytes;
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private String firmwareVersion;
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public Mi2FirmwareInfo(byte[] bytes) {
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this.bytes = bytes;
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crc16 = CheckSums.getCRC16(bytes);
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firmwareVersion = crcToVersion.get(crc16);
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firmwareType = determineFirmwareType(bytes);
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}
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protected FirmwareType determineFirmwareType(byte[] bytes) {
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if (ArrayUtils.startsWith(bytes, FT_HEADER)) {
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return FirmwareType.FONT;
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}
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if (ArrayUtils.equals(bytes, FW_HEADER, FW_HEADER_OFFSET)) {
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// TODO: this is certainly not a correct validation, but it works for now
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return FirmwareType.FIRMWARE;
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}
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return FirmwareType.INVALID;
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}
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public boolean isGenerallyCompatibleWith(GBDevice device) {
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return isHeaderValid() && device.getType() == DeviceType.MIBAND2;
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}
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public boolean isHeaderValid() {
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return getFirmwareType() != FirmwareType.INVALID;
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}
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public void checkValid() throws IllegalArgumentException {
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}
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/**
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* Returns the size of the firmware in number of bytes.
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* @return
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*/
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public int getSize() {
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return bytes.length;
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}
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public byte[] getBytes() {
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return bytes;
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}
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public int getCrc16() {
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return crc16;
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}
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public int getFirmwareVersion() {
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return getCrc16(); // HACK until we know how to determine the version from the fw bytes
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}
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public FirmwareType getFirmwareType() {
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return firmwareType;
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}
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}
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