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package org.subsurfacedivelog.mobile;
import com.hoho.android.usbserial.driver.UsbSerialDriver;
import com.hoho.android.usbserial.driver.UsbSerialPort;
import com.hoho.android.usbserial.driver.UsbSerialProber;
import android.hardware.usb.UsbDeviceConnection;
import android.hardware.usb.UsbManager;
import android.hardware.usb.UsbDevice;
import android.content.Context;
import android.util.Log;
import android.app.PendingIntent;
import android.content.Intent;
import org.subsurfacedivelog.mobile.SubsurfaceMobileActivity;
import java.lang.System;
import java.lang.Thread;
import java.util.Queue;
import java.util.List;
import java.util.LinkedList;
import java.lang.Math;
public class AndroidSerial {
private static final String TAG = "AndroidSerial";
private static final int DC_STATUS_SUCCESS = 0;
private static final int DC_STATUS_DONE = 1;
private static final int DC_STATUS_UNSUPPORTED = -1;
private static final int DC_STATUS_INVALIDARGS = -2;
private static final int DC_STATUS_NOMEMORY = -3;
private static final int DC_STATUS_NODEVICE = -4;
private static final int DC_STATUS_NOACCESS = -5;
private static final int DC_STATUS_IO = -6;
private static final int DC_STATUS_TIMEOUT = -7;
private static final int DC_STATUS_PROTOCOL = -8;
private static final int DC_STATUS_DATAFORMAT = -9;
private static final int DC_STATUS_CANCELLED = -1;
/**
* The parity checking scheme.
* Matches us-serial-for-android
*/
private static final int DC_PARITY_NONE = 0;
private static final int DC_PARITY_ODD = 1;
private static final int DC_PARITY_EVEN = 2;
private static final int DC_PARITY_MARK = 3;
private static final int DC_PARITY_SPACE = 4;
/**
* The number of stop bits.
* Has to be translated for usb-serial-for-android
*/
private static final int DC_STOPBITS_ONE = 0; /**< 1 stop bit */
private static final int DC_STOPBITS_ONEPOINTFIVE = 1; /**< 1.5 stop bits*/
private static final int DC_STOPBITS_TWO = 2; /**< 2 stop bits */
/**
* The direction of the data transmission.
*/
private static final int DC_DIRECTION_INPUT = 1; /**< Input direction */
private static final int DC_DIRECTION_OUTPUT = 2; /**< Output direction */
private static final int DC_DIRECTION_ALL = 3; /**< All directions */
private UsbSerialPort usbSerialPort;
private int timeout = 0;
private LinkedList<Byte> readBuffer = new LinkedList<Byte>();
private static String printQueue(LinkedList<Byte> readBuffer)
{
String str = "" + readBuffer.size() + " elements: ";
for (byte element : readBuffer) {
str = str + String.format("%02X", element);
}
return str;
}
private AndroidSerial(UsbSerialPort usbSerialPort)
{
this.usbSerialPort = usbSerialPort;
}
public static AndroidSerial open_android_serial()
{
try {
Log.d(TAG, "in " + Thread.currentThread().getStackTrace()[2].getMethodName());
// Find all available drivers from attached devices.
Context context = SubsurfaceMobileActivity.getAppContext();
UsbManager manager = (UsbManager) context.getSystemService(Context.USB_SERVICE);
UsbSerialProber usbSerialProber = UsbSerialProber.getDefaultProber();
// TODO attach custom VID / PID / Drivers
List<UsbSerialDriver> availableDrivers = usbSerialProber.findAllDrivers(manager);
if (availableDrivers.isEmpty()) {
Log.w(TAG, "no usb-to-serial devices found!");
return null;
}
// Open a connection to the first available driver.
UsbSerialDriver driver = availableDrivers.get(0);
UsbDeviceConnection connection = manager.openDevice(driver.getDevice());
if (connection == null) {
manager.requestPermission(driver.getDevice(), PendingIntent.getBroadcast(context, 0, new Intent("org.subsurfacedivelog.mobile.USB_PERMISSION"), 0));
Log.w(TAG, "Could not open device!");
return null;
}
Log.i(TAG, "Num ports: " + driver.getPorts().size());
UsbSerialPort usbSerialPort = driver.getPorts().get(0); // Most devices have just one port (port 0)
usbSerialPort.open(connection);
Log.i(TAG, "Opened serial device " + usbSerialPort);
return new AndroidSerial(usbSerialPort);
} catch (Exception e) {
Log.e(TAG, "Error in " + Thread.currentThread().getStackTrace()[2].getMethodName(), e);
return null;
}
}
/* dc_status_t */
public int set_timeout(int timeout)
{
Log.d(TAG, "in " + Thread.currentThread().getStackTrace()[2].getMethodName());
this.timeout = timeout;
return AndroidSerial.DC_STATUS_SUCCESS;
}
/* dc_status_t */
public int set_dtr(boolean value)
{
Log.d(TAG, "in " + Thread.currentThread().getStackTrace()[2].getMethodName());
try {
usbSerialPort.setDTR(value);
} catch (Exception e) {
Log.e(TAG, "Error in " + Thread.currentThread().getStackTrace()[2].getMethodName(), e);
return AndroidSerial.DC_STATUS_IO;
}
return AndroidSerial.DC_STATUS_SUCCESS;
}
/* dc_status_t */
public int set_rts(boolean value)
{
Log.d(TAG, "in " + Thread.currentThread().getStackTrace()[2].getMethodName());
try {
usbSerialPort.setRTS(value);
} catch (Exception e) {
Log.e(TAG, "Error in " + Thread.currentThread().getStackTrace()[2].getMethodName(), e);
return AndroidSerial.DC_STATUS_IO;
}
return AndroidSerial.DC_STATUS_SUCCESS;
}
/* length of read data, or dc_status_t if not successful */
/*
// Currently commented out since a non-blocking get_available is not possible due to usb-serial-for-android limitations
public int get_available() {
Log.d(TAG, "in " + Thread.currentThread().getStackTrace()[2].getMethodName());
try {
byte[] readData = new byte[64]; // TODO magic number
int len = usbSerialPort.read(readData, 250); // TODO magic number
for (int i = 0; i < len; i++) {
readBuffer.add(readData[i]);
}
return readBuffer.size();
} catch (Exception e) {
Log.e(TAG, "Error in " + Thread.currentThread().getStackTrace()[2].getMethodName(), e);
return AndroidSerial.DC_STATUS_IO;
}
}
*/
// Flow control is not implemented in usb-serial-for-android. It's not used by any dive computer anyways...
/* dc_status_t */
public int configure(int baudrate, int databits, /*dc_parity_t*/ int parity, /*dc_stopbits_t*/ int stopbits)
{
Log.d(TAG, "in " + Thread.currentThread().getStackTrace()[2].getMethodName() + ", baudrate=" + baudrate + ", databits=" + databits + ", parity=" + parity + ", stopbits=" + stopbits);
int translated_stopbits = 0;
switch(stopbits) {
case AndroidSerial.DC_STOPBITS_ONE:
translated_stopbits = UsbSerialPort.STOPBITS_1;
break;
case AndroidSerial.DC_STOPBITS_ONEPOINTFIVE:
translated_stopbits = UsbSerialPort.STOPBITS_1_5;
break;
case AndroidSerial.DC_STOPBITS_TWO:
translated_stopbits = UsbSerialPort.STOPBITS_2;
break;
}
try {
usbSerialPort.setParameters(baudrate, databits, translated_stopbits, parity);
} catch (Exception e) {
Log.e(TAG, "Error in " + Thread.currentThread().getStackTrace()[2].getMethodName(), e);
return AndroidSerial.DC_STATUS_IO;
}
return AndroidSerial.DC_STATUS_SUCCESS;
}
/* length of read data, or dc_status_t if not successful */
public int read(byte[] data)
{
Log.d(TAG, "in " + Thread.currentThread().getStackTrace()[2].getMethodName());
try {
Log.d(TAG, "read length: " + data.length);
int toReadFromHwLength = data.length - readBuffer.size();
int arraylength = (toReadFromHwLength % 64) != 0 ? toReadFromHwLength + (64 - (toReadFromHwLength % 64)): toReadFromHwLength; // use blocks of 64 for reading
// When we don't have enough in the buffer, try to read from HW
if (toReadFromHwLength > 0) {
// Read and append to buffer
byte[] readFromHwData = new byte[arraylength];
int actuallyReadFromHwLength = usbSerialPort.read(readFromHwData, 0); // With this it works... But the timeout is ignored! Fix this!
for (int i = 0; i < actuallyReadFromHwLength; i++ ) {
readBuffer.add(readFromHwData[i]);
}
}
//Log.d(TAG, "read buffer: " + printQueue(readBuffer));
int returnLength = 0;
for (returnLength = 0; returnLength < data.length; returnLength++) {
if (readBuffer.isEmpty()) break;
data[returnLength] = readBuffer.remove();
}
Log.d(TAG, "return length: " + returnLength);
return returnLength;
} catch (Exception e) {
Log.e(TAG, "Error in " + Thread.currentThread().getStackTrace()[2].getMethodName(), e);
return AndroidSerial.DC_STATUS_IO;
}
}
/* number of bytes written, or dc_status_t */
public int write (byte[] data)
{
Log.d(TAG, "in " + Thread.currentThread().getStackTrace()[2].getMethodName());
try {
Log.d(TAG, "write length: " + data.length);
int retval = usbSerialPort.write(data, timeout);
Log.d(TAG, "actual write length: " + retval);
return retval;
} catch (Exception e) {
Log.e(TAG, "Error in " + Thread.currentThread().getStackTrace()[2].getMethodName(), e);
return AndroidSerial.DC_STATUS_IO;
}
}
/* dc_status_t */
public int purge (/*dc_direction_t*/ int direction)
{
Log.d(TAG, "in " + Thread.currentThread().getStackTrace()[2].getMethodName());
try {
if ((direction | AndroidSerial.DC_DIRECTION_INPUT) > 0) readBuffer.clear();
boolean retval = this.usbSerialPort.purgeHwBuffers((direction | AndroidSerial.DC_DIRECTION_OUTPUT) > 0, (direction | AndroidSerial.DC_DIRECTION_INPUT) > 0);
return retval ? AndroidSerial.DC_STATUS_SUCCESS : AndroidSerial.DC_STATUS_IO;
} catch (Exception e) {
Log.e(TAG, "Error in " + Thread.currentThread().getStackTrace()[2].getMethodName(), e);
return AndroidSerial.DC_STATUS_IO;
}
}
/*dc_status_t*/
public int close ()
{
Log.d(TAG, "in " + Thread.currentThread().getStackTrace()[2].getMethodName());
try {
usbSerialPort.close();
return AndroidSerial.DC_STATUS_SUCCESS;
} catch (Exception e) {
Log.e(TAG, "Error in " + Thread.currentThread().getStackTrace()[2].getMethodName(), e);
return AndroidSerial.DC_STATUS_IO;
}
}
}
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