88 lines
2.3 KiB
Java
88 lines
2.3 KiB
Java
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 Map<Integer,String> crcToVersion = new HashMap<>();
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static {
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crcToVersion.put(41899, "1.0.0.39");
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}
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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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}
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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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protected boolean isHeaderValid() {
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// TODO: not sure if this is a correct check!
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return ArrayUtils.equals(FW_HEADER, bytes, FW_HEADER_OFFSET, FW_HEADER_OFFSET + FW_HEADER.length);
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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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}
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