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Pebble app installation: Use data (filenames, sizes and crc) from manifest.json (Fixes #16)

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Also remove STM32CRC.java, which had broken tail code, we use the crc from the manifest now.
This commit is contained in:
Andreas Shimokawa 2015-04-17 00:57:50 +02:00
parent 47fd1a7dff
commit 90f2b4ded3
4 changed files with 189 additions and 300 deletions
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90
app/src/main/java/nodomain/freeyourgadget/gadgetbridge/pebble/PBWReader.java
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@ -3,6 +3,7 @@ package nodomain.freeyourgadget.gadgetbridge.pebble;
import android.content.ContentResolver;
import android.content.Context;
import android.net.Uri;
import android.util.Log;
import org.json.JSONException;
import org.json.JSONObject;
@ -19,10 +20,12 @@ import java.util.zip.ZipInputStream;
import nodomain.freeyourgadget.gadgetbridge.GBDeviceApp;
public class PBWReader {
private static final String TAG = PebbleIoThread.class.getSimpleName();
private GBDeviceApp app;
private final Uri uri;
private final ContentResolver cr;
private ArrayList<String> filesToInstall;
private ArrayList<PebbleInstallable> pebbleInstallables;
public PBWReader(Uri uri, Context context) {
this.uri = uri;
@ -37,21 +40,65 @@ public class PBWReader {
return;
}
ZipInputStream zis = new ZipInputStream(fin);
ZipEntry ze = null;
filesToInstall = new ArrayList<String>();
ZipEntry ze;
pebbleInstallables = new ArrayList<PebbleInstallable>();
byte[] buffer = new byte[1024];
int count;
try {
while ((ze = zis.getNextEntry()) != null) {
String fileName = ze.getName();
if (fileName.equals("pebble-app.bin") || fileName.equals("pebble-worker.bin") || fileName.equals("app_resources.pbpack") || fileName.equals("")) {
filesToInstall.add(fileName); // FIXME: do not hardcode filenames above
if (fileName.equals("manifest.json")) {
long bytes = ze.getSize();
if (bytes > 8192) // that should be too much
break;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
while ((count = zis.read(buffer)) != -1) {
baos.write(buffer, 0, count);
}
String jsonString = baos.toString();
try {
JSONObject json = new JSONObject(jsonString);
JSONObject application = json.getJSONObject("application");
String name = application.getString("name");
int size = application.getInt("size");
long crc = application.getLong("crc");
pebbleInstallables.add(new PebbleInstallable(name, size, (int) crc, PebbleProtocol.PUTBYTES_TYPE_BINARY));
Log.i(TAG, "found app binary to install: " + name);
try {
JSONObject resources = json.getJSONObject("resources");
name = resources.getString("name");
size = resources.getInt("size");
crc = resources.getLong("crc");
pebbleInstallables.add(new PebbleInstallable(name, size, (int) crc, PebbleProtocol.PUTBYTES_TYPE_RESOURCES));
Log.i(TAG, "found resources to install: " + name);
} catch (JSONException e) {
// no resources, that is no problem
}
try {
JSONObject worker = json.getJSONObject("worker");
name = worker.getString("name");
size = worker.getInt("size");
crc = worker.getLong("crc");
pebbleInstallables.add(new PebbleInstallable(name, size, (int) crc, PebbleProtocol.PUTBYTES_TYPE_WORKER));
Log.i(TAG, "found worker to install: " + name);
} catch (JSONException e) {
// no worker, that is no problem
}
} catch (JSONException e) {
// no application, that is a problem
e.printStackTrace();
break;
}
} else if (fileName.equals("appinfo.json")) {
long bytes = ze.getSize();
if (bytes > 8192) // that should be too much
break;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int count;
while ((count = zis.read(buffer)) != -1) {
baos.write(buffer, 0, count);
}
@ -108,33 +155,8 @@ public class PBWReader {
return null;
}
public int getFileSize(String filename) {
InputStream fin = null;
try {
fin = new BufferedInputStream(cr.openInputStream(uri));
} catch (FileNotFoundException e) {
e.printStackTrace();
return -1;
}
ZipInputStream zis = new ZipInputStream(fin);
ZipEntry ze = null;
try {
while ((ze = zis.getNextEntry()) != null) {
if (ze.getName().equals(filename)) {
return (int) ze.getSize();
}
}
zis.close();
} catch (IOException e) {
e.printStackTrace();
}
return -1;
}
public String[] getFilesToInstall() {
return filesToInstall.toArray(new String[filesToInstall.size()]);
public PebbleInstallable[] getPebbleInstallables() {
return pebbleInstallables.toArray(new PebbleInstallable[pebbleInstallables.size()]);
}
}

31
app/src/main/java/nodomain/freeyourgadget/gadgetbridge/pebble/PebbleInstallable.java Normal file
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@ -0,0 +1,31 @@
package nodomain.freeyourgadget.gadgetbridge.pebble;
public class PebbleInstallable {
final private byte type;
final private int crc;
final private String fileName;
final private int fileSize;
public PebbleInstallable(String fileName, int fileSize, int crc, byte type) {
this.fileName = fileName;
this.fileSize = fileSize;
this.crc = crc;
this.type = type;
}
public String getFileName() {
return fileName;
}
public int getFileSize() {
return fileSize;
}
public byte getType() {
return type;
}
public int getCRC() {
return crc;
}
}

216
app/src/main/java/nodomain/freeyourgadget/gadgetbridge/pebble/PebbleIoThread.java
View File

@ -48,31 +48,32 @@ public class PebbleIoThread extends GBDeviceIoThread {
APP_REFRESH,
}
private final PebbleProtocol mmPebbleProtocol;
private final PebbleProtocol mPebbleProtocol;
private BluetoothAdapter mBtAdapter = null;
private BluetoothSocket mBtSocket = null;
private InputStream mmInStream = null;
private OutputStream mmOutStream = null;
private boolean mmQuit = false;
private boolean mmIsConnected = false;
private boolean mmIsInstalling = false;
private int mmConnectionAttempts = 0;
private InputStream mInStream = null;
private OutputStream mOutStream = null;
private boolean mQuit = false;
private boolean mIsConnected = false;
private boolean mIsInstalling = false;
private int mConnectionAttempts = 0;
/* app installation */
private Uri mmInstallURI = null;
private PBWReader mmPBWReader = null;
private int mmAppInstallToken = -1;
private ZipInputStream mmZis = null;
private STM32CRC mmSTM32CRC = new STM32CRC();
private PebbleAppInstallState mmInstallState = PebbleAppInstallState.UNKNOWN;
private String[] mmFilesToInstall = null;
private int mmCurrentFileIndex = -1;
private int mmInstallSlot = -1;
private Uri mInstallURI = null;
private PBWReader mPBWReader = null;
private int mAppInstallToken = -1;
private ZipInputStream mZis = null;
private PebbleAppInstallState mInstallState = PebbleAppInstallState.UNKNOWN;
private PebbleInstallable[] mPebbleInstallables = null;
private PebbleInstallable mPebbleInstallable = null;
private int mCurrentInstallableIndex = -1;
private int mInstallSlot = -1;
private int mCRC = -1;
public PebbleIoThread(GBDevice gbDevice, GBDeviceProtocol gbDeviceProtocol, BluetoothAdapter btAdapter, Context context) {
super(gbDevice, context);
mmPebbleProtocol = (PebbleProtocol) gbDeviceProtocol;
mPebbleProtocol = (PebbleProtocol) gbDeviceProtocol;
mBtAdapter = btAdapter;
}
@ -83,13 +84,13 @@ public class PebbleIoThread extends GBDeviceIoThread {
try {
mBtSocket = btDevice.createRfcommSocketToServiceRecord(uuids[0].getUuid());
mBtSocket.connect();
mmInStream = mBtSocket.getInputStream();
mmOutStream = mBtSocket.getOutputStream();
mInStream = mBtSocket.getInputStream();
mOutStream = mBtSocket.getOutputStream();
} catch (IOException e) {
e.printStackTrace();
gbDevice.setState(originalState);
mmInStream = null;
mmOutStream = null;
mInStream = null;
mOutStream = null;
mBtSocket = null;
return false;
}
@ -101,99 +102,85 @@ public class PebbleIoThread extends GBDeviceIoThread {
}
public void run() {
mmIsConnected = connect(gbDevice.getAddress());
GB.setReceiversEnableState(mmIsConnected, getContext()); // enable/disable BroadcastReceivers
mmQuit = !mmIsConnected; // quit if not connected
mIsConnected = connect(gbDevice.getAddress());
GB.setReceiversEnableState(mIsConnected, getContext()); // enable/disable BroadcastReceivers
mQuit = !mIsConnected; // quit if not connected
byte[] buffer = new byte[8192];
int bytes;
while (!mmQuit) {
while (!mQuit) {
try {
if (mmIsInstalling) {
switch (mmInstallState) {
if (mIsInstalling) {
switch (mInstallState) {
case APP_WAIT_SLOT:
if (mmInstallSlot != -1) {
if (mInstallSlot != -1) {
GB.updateNotification("starting installation", getContext());
mmInstallState = PebbleAppInstallState.APP_START_INSTALL;
mInstallState = PebbleAppInstallState.APP_START_INSTALL;
continue;
}
break;
case APP_START_INSTALL:
Log.i(TAG, "start installing app binary");
mmSTM32CRC.reset();
if (mmPBWReader == null) {
mmPBWReader = new PBWReader(mmInstallURI, getContext());
mmFilesToInstall = mmPBWReader.getFilesToInstall();
mmCurrentFileIndex = 0;
if (mPBWReader == null) {
mPBWReader = new PBWReader(mInstallURI, getContext());
mPebbleInstallables = mPBWReader.getPebbleInstallables();
mCurrentInstallableIndex = 0;
}
String fileName = mmFilesToInstall[mmCurrentFileIndex];
mmZis = mmPBWReader.getInputStreamFile(fileName);
int binarySize = mmPBWReader.getFileSize(fileName);
// FIXME: do not assume type from filename, parse json correctly in PBWReader
byte type = -1;
if (fileName.equals("pebble-app.bin")) {
type = PebbleProtocol.PUTBYTES_TYPE_BINARY;
} else if (fileName.equals("pebble-worker.bin")) {
type = PebbleProtocol.PUTBYTES_TYPE_WORKER;
} else if (fileName.equals("app_resources.pbpack")) {
type = PebbleProtocol.PUTBYTES_TYPE_RESOURCES;
} else {
finishInstall(true);
break;
}
writeInstallApp(mmPebbleProtocol.encodeUploadStart(type, (byte) mmInstallSlot, binarySize));
mmInstallState = PebbleAppInstallState.APP_WAIT_TOKEN;
PebbleInstallable pi = mPebbleInstallables[mCurrentInstallableIndex];
mZis = mPBWReader.getInputStreamFile(pi.getFileName());
mCRC = pi.getCRC();
int binarySize = pi.getFileSize(); // TODO: use for progrssbar
writeInstallApp(mPebbleProtocol.encodeUploadStart(pi.getType(), (byte) mInstallSlot, binarySize));
mInstallState = PebbleAppInstallState.APP_WAIT_TOKEN;
break;
case APP_WAIT_TOKEN:
if (mmAppInstallToken != -1) {
Log.i(TAG, "got token " + mmAppInstallToken);
mmInstallState = PebbleAppInstallState.APP_UPLOAD_CHUNK;
if (mAppInstallToken != -1) {
Log.i(TAG, "got token " + mAppInstallToken);
mInstallState = PebbleAppInstallState.APP_UPLOAD_CHUNK;
continue;
}
break;
case APP_UPLOAD_CHUNK:
bytes = mmZis.read(buffer);
bytes = mZis.read(buffer);
if (bytes != -1) {
mmSTM32CRC.addData(buffer, bytes);
writeInstallApp(mmPebbleProtocol.encodeUploadChunk(mmAppInstallToken, buffer, bytes));
mmAppInstallToken = -1;
mmInstallState = PebbleAppInstallState.APP_WAIT_TOKEN;
writeInstallApp(mPebbleProtocol.encodeUploadChunk(mAppInstallToken, buffer, bytes));
mAppInstallToken = -1;
mInstallState = PebbleAppInstallState.APP_WAIT_TOKEN;
} else {
mmInstallState = PebbleAppInstallState.APP_UPLOAD_COMMIT;
mInstallState = PebbleAppInstallState.APP_UPLOAD_COMMIT;
continue;
}
break;
case APP_UPLOAD_COMMIT:
writeInstallApp(mmPebbleProtocol.encodeUploadCommit(mmAppInstallToken, mmSTM32CRC.getResult()));
mmAppInstallToken = -1;
mmInstallState = PebbleAppInstallState.APP_WAIT_COMMMIT;
writeInstallApp(mPebbleProtocol.encodeUploadCommit(mAppInstallToken, mCRC));
mAppInstallToken = -1;
mInstallState = PebbleAppInstallState.APP_WAIT_COMMMIT;
break;
case APP_WAIT_COMMMIT:
if (mmAppInstallToken != -1) {
Log.i(TAG, "got token " + mmAppInstallToken);
mmInstallState = PebbleAppInstallState.APP_UPLOAD_COMPLETE;
if (mAppInstallToken != -1) {
Log.i(TAG, "got token " + mAppInstallToken);
mInstallState = PebbleAppInstallState.APP_UPLOAD_COMPLETE;
continue;
}
break;
case APP_UPLOAD_COMPLETE:
writeInstallApp(mmPebbleProtocol.encodeUploadComplete(mmAppInstallToken));
if (++mmCurrentFileIndex < mmFilesToInstall.length) {
mmInstallState = PebbleAppInstallState.APP_START_INSTALL;
writeInstallApp(mPebbleProtocol.encodeUploadComplete(mAppInstallToken));
if (++mCurrentInstallableIndex < mPebbleInstallables.length) {
mInstallState = PebbleAppInstallState.APP_START_INSTALL;
} else {
mmInstallState = PebbleAppInstallState.APP_REFRESH;
mInstallState = PebbleAppInstallState.APP_REFRESH;
}
break;
case APP_REFRESH:
writeInstallApp(mmPebbleProtocol.encodeAppRefresh(mmInstallSlot));
writeInstallApp(mPebbleProtocol.encodeAppRefresh(mInstallSlot));
break;
default:
break;
}
}
bytes = mmInStream.read(buffer, 0, 4);
bytes = mInStream.read(buffer, 0, 4);
if (bytes < 4)
continue;
@ -203,13 +190,13 @@ public class PebbleIoThread extends GBDeviceIoThread {
short endpoint = buf.getShort();
if (length < 0 || length > 8192) {
Log.i(TAG, "invalid length " + length);
while (mmInStream.available() > 0) {
mmInStream.read(buffer); // read all
while (mInStream.available() > 0) {
mInStream.read(buffer); // read all
}
continue;
}
bytes = mmInStream.read(buffer, 4, length);
bytes = mInStream.read(buffer, 4, length);
if (bytes < length) {
try {
Thread.sleep(100);
@ -217,23 +204,23 @@ public class PebbleIoThread extends GBDeviceIoThread {
e.printStackTrace();
}
Log.i(TAG, "Read " + bytes + ", expected " + length + " reading remaining " + (length - bytes));
int bytes_rest = mmInStream.read(buffer, 4 + bytes, length - bytes);
int bytes_rest = mInStream.read(buffer, 4 + bytes, length - bytes);
bytes += bytes_rest;
}
if (length == 1 && endpoint == PebbleProtocol.ENDPOINT_PHONEVERSION) {
Log.i(TAG, "Pebble asked for Phone/App Version - repLYING!");
write(mmPebbleProtocol.encodePhoneVersion(PebbleProtocol.PHONEVERSION_REMOTE_OS_ANDROID));
write(mmPebbleProtocol.encodeFirmwareVersionReq());
write(mPebbleProtocol.encodePhoneVersion(PebbleProtocol.PHONEVERSION_REMOTE_OS_ANDROID));
write(mPebbleProtocol.encodeFirmwareVersionReq());
// this does not really belong here, but since the pebble only asks for our version once it should do the job
SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(getContext());
if (sharedPrefs.getBoolean("datetime_synconconnect", true)) {
Log.i(TAG, "syncing time");
write(mmPebbleProtocol.encodeSetTime(-1));
write(mPebbleProtocol.encodeSetTime(-1));
}
} else if (endpoint != PebbleProtocol.ENDPOINT_DATALOG) {
GBDeviceCommand deviceCmd = mmPebbleProtocol.decodeResponse(buffer);
GBDeviceCommand deviceCmd = mPebbleProtocol.decodeResponse(buffer);
if (deviceCmd == null) {
Log.i(TAG, "unhandled message to endpoint " + endpoint + " (" + bytes + " bytes)");
} else {
@ -252,23 +239,23 @@ public class PebbleIoThread extends GBDeviceIoThread {
gbDevice.sendDeviceUpdateIntent(getContext());
GB.updateNotification("connection lost, trying to reconnect", getContext());
while (mmConnectionAttempts++ < 10) {
Log.i(TAG, "Trying to reconnect (attempt " + mmConnectionAttempts + ")");
mmIsConnected = connect(gbDevice.getAddress());
if (mmIsConnected)
while (mConnectionAttempts++ < 10) {
Log.i(TAG, "Trying to reconnect (attempt " + mConnectionAttempts + ")");
mIsConnected = connect(gbDevice.getAddress());
if (mIsConnected)
break;
}
mmConnectionAttempts = 0;
if (!mmIsConnected) {
mConnectionAttempts = 0;
if (!mIsConnected) {
mBtSocket = null;
GB.setReceiversEnableState(false, getContext());
Log.i(TAG, "Bluetooth socket closed, will quit IO Thread");
mmQuit = true;
mQuit = true;
}
}
}
}
mmIsConnected = false;
mIsConnected = false;
if (mBtSocket != null) {
try {
mBtSocket.close();
@ -284,15 +271,16 @@ public class PebbleIoThread extends GBDeviceIoThread {
synchronized public void write(byte[] bytes) {
// block writes if app installation in in progress
if (mmIsConnected && !mmIsInstalling) {
if (mIsConnected && !mIsInstalling) {
try {
mmOutStream.write(bytes);
mmOutStream.flush();
mOutStream.write(bytes);
mOutStream.flush();
} catch (IOException e) {
}
}
}
// FIXME: this does not belong here in this class, it is supporsed to be generic code
private void evaluateGBCommandBundle(GBDeviceCommand deviceCmd) {
Context context = getContext();
@ -352,7 +340,7 @@ public class PebbleIoThread extends GBDeviceIoThread {
case SUCCESS:
finishInstall(false);
// refresh app list
write(mmPebbleProtocol.encodeAppInfoReq());
write(mPebbleProtocol.encodeAppInfoReq());
break;
default:
break;
@ -380,17 +368,17 @@ public class PebbleIoThread extends GBDeviceIoThread {
}
public void setToken(int token) {
mmAppInstallToken = token;
mAppInstallToken = token;
}
public void setInstallSlot(int slot) {
if (mmIsInstalling) {
mmInstallSlot = slot;
if (mIsInstalling) {
mInstallSlot = slot;
}
}
private void writeInstallApp(byte[] bytes) {
if (!mmIsInstalling) {
if (!mIsInstalling) {
return;
}
int length = bytes.length;
@ -406,24 +394,24 @@ public class PebbleIoThread extends GBDeviceIoThread {
Log.i(TAG, new String(hexChars));
*/
try {
mmOutStream.write(bytes);
mmOutStream.flush();
mOutStream.write(bytes);
mOutStream.flush();
} catch (IOException e) {
}
}
public void installApp(Uri uri) {
if (mmIsInstalling) {
if (mIsInstalling) {
return;
}
write(mmPebbleProtocol.encodeAppInfoReq()); // do this here to get run() out of its blocking read
mmInstallState = PebbleAppInstallState.APP_WAIT_SLOT;
mmInstallURI = uri;
mmIsInstalling = true;
write(mPebbleProtocol.encodeAppInfoReq()); // do this here to get run() out of its blocking read
mInstallState = PebbleAppInstallState.APP_WAIT_SLOT;
mInstallURI = uri;
mIsInstalling = true;
}
public void finishInstall(boolean hadError) {
if (!mmIsInstalling) {
if (!mIsInstalling) {
return;
}
if (hadError) {
@ -431,21 +419,21 @@ public class PebbleIoThread extends GBDeviceIoThread {
} else {
GB.updateNotification("installation successful", getContext());
}
mmInstallState = PebbleAppInstallState.UNKNOWN;
mInstallState = PebbleAppInstallState.UNKNOWN;
if (hadError == true && mmAppInstallToken != -1) {
writeInstallApp(mmPebbleProtocol.encodeUploadCancel(mmAppInstallToken));
if (hadError == true && mAppInstallToken != -1) {
writeInstallApp(mPebbleProtocol.encodeUploadCancel(mAppInstallToken));
}
mmPBWReader = null;
mmIsInstalling = false;
mmZis = null;
mmAppInstallToken = -1;
mmInstallSlot = -1;
mPBWReader = null;
mIsInstalling = false;
mZis = null;
mAppInstallToken = -1;
mInstallSlot = -1;
}
public void quit() {
mmQuit = true;
mQuit = true;
if (mBtSocket != null) {
try {
mBtSocket.close();

152
app/src/main/java/nodomain/freeyourgadget/gadgetbridge/pebble/STM32CRC.java
View File

@ -1,152 +0,0 @@
package nodomain.freeyourgadget.gadgetbridge.pebble;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
/*
* This code was ported to java from the following cpp source file
* https://github.com/smokku/pebble/blob/8f0905197f7cead299c00006ada482095fe9d1a4/daemon/stm32crc.cpp
* (Unofficial Pebble watch support for SailfishOS/Jolla)
*/
public class STM32CRC {
private int crc;
private byte rem;
private byte buffer[] = {0, 0, 0, 0};
private static final int[] crc_table = {
0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9,
0x130476dc, 0x17c56b6b, 0x1a864db2, 0x1e475005,
0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,
0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd,
0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9,
0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011,
0x791d4014, 0x7ddc5da3, 0x709f7b7a, 0x745e66cd,
0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,
0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5,
0xbe2b5b58, 0xbaea46ef, 0xb7a96036, 0xb3687d81,
0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49,
0xc7361b4c, 0xc3f706fb, 0xceb42022, 0xca753d95,
0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,
0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d,
0x34867077, 0x30476dc0, 0x3d044b19, 0x39c556ae,
0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16,
0x018aeb13, 0x054bf6a4, 0x0808d07d, 0x0cc9cdca,
0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde,
0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02,
0x5e9f46bf, 0x5a5e5b08, 0x571d7dd1, 0x53dc6066,
0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e,
0xbfa1b04b, 0xbb60adfc, 0xb6238b25, 0xb2e29692,
0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6,
0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a,
0xe0b41de7, 0xe4750050, 0xe9362689, 0xedf73b3e,
0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686,
0xd5b88683, 0xd1799b34, 0xdc3abded, 0xd8fba05a,
0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637,
0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb,
0x4f040d56, 0x4bc510e1, 0x46863638, 0x42472b8f,
0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47,
0x36194d42, 0x32d850f5, 0x3f9b762c, 0x3b5a6b9b,
0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,
0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623,
0xf12f560e, 0xf5ee4bb9, 0xf8ad6d60, 0xfc6c70d7,
0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f,
0xc423cd6a, 0xc0e2d0dd, 0xcda1f604, 0xc960ebb3,
0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,
0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b,
0x9b3660c6, 0x9ff77d71, 0x92b45ba8, 0x9675461f,
0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640,
0x4e8ee645, 0x4a4ffbf2, 0x470cdd2b, 0x43cdc09c,
0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8,
0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24,
0x119b4be9, 0x155a565e, 0x18197087, 0x1cd86d30,
0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088,
0x2497d08d, 0x2056cd3a, 0x2d15ebe3, 0x29d4f654,
0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0,
0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c,
0xe3a1cbc1, 0xe760d676, 0xea23f0af, 0xeee2ed18,
0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0,
0x9abc8bd5, 0x9e7d9662, 0x933eb0bb, 0x97ffad0c,
0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668,
0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4,
};
public void reset() {
crc = 0xffffffff;
rem = 0;
buffer[0] = 0;
buffer[1] = 0;
buffer[2] = 0;
buffer[3] = 0;
}
public STM32CRC() {
reset();
}
private int calc_crc(int crc, int word) {
crc ^= word;
crc = (crc << 8) ^ crc_table[(crc >>> 24) & 0xFF];
crc = (crc << 8) ^ crc_table[(crc >>> 24) & 0xFF];
crc = (crc << 8) ^ crc_table[(crc >>> 24) & 0xFF];
crc = (crc << 8) ^ crc_table[(crc >>> 24) & 0xFF];
return crc;
}
public void addData(byte[] data, int length) {
ByteBuffer buf = ByteBuffer.wrap(data, 0, length);
buf.order(ByteOrder.LITTLE_ENDIAN);
if (rem > 0) {
for (; rem < 4 && buf.hasRemaining(); ++rem) {
buffer[rem] = buf.get();
}
if (rem == 4) {
int word = ((buffer[0] & 0xff)) |
((buffer[1] & 0xff) << 8) |
((buffer[2] & 0xff) << 16) |
((buffer[3] & 0xff) << 24);
crc = calc_crc(crc, word);
buffer[0] = 0;
buffer[1] = 0;
buffer[2] = 0;
buffer[3] = 0;
rem = 0;
}
}
while (buf.remaining() >= 4) {
int word = buf.getInt();
crc = calc_crc(crc, word);
}
while (buf.hasRemaining()) {
buffer[rem++] = buf.get();
}
}
public int getResult() {
if (rem > 0) {
int word = ((buffer[0] & 0xff)) |
((buffer[1] & 0xff) << 8) |
((buffer[2] & 0xff) << 16) |
((buffer[3] & 0xff) << 24);
return calc_crc(crc, word);
} else {
return crc;
}
}
}