kopia lustrzana https://github.com/mik3y/usb-serial-for-android
implement async read for all devices
rodzic
adb22f718e
commit
0ea5b282b7
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@ -0,0 +1,4 @@
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caches
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codeStyles
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libraries
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workspace.xml
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@ -6,7 +6,7 @@ buildscript {
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google()
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}
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dependencies {
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classpath 'com.android.tools.build:gradle:3.0.1'
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classpath 'com.android.tools.build:gradle:3.1.1'
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}
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}
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@ -1,6 +1,6 @@
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#Thu Oct 26 20:06:55 CEST 2017
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#Tue Mar 27 21:28:01 CEST 2018
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distributionBase=GRADLE_USER_HOME
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distributionPath=wrapper/dists
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zipStoreBase=GRADLE_USER_HOME
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zipStorePath=wrapper/dists
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distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
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distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
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@ -2,7 +2,7 @@ apply plugin: 'com.android.application'
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android {
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compileSdkVersion 26
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buildToolsVersion "26.0.2"
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buildToolsVersion '27.0.3'
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defaultConfig {
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minSdkVersion 14
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@ -4,7 +4,7 @@ apply plugin: 'signing'
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android {
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compileSdkVersion 26
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buildToolsVersion "26.0.2"
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buildToolsVersion '27.0.3'
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defaultConfig {
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minSdkVersion 14
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@ -22,7 +22,7 @@ android {
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dependencies {
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testImplementation 'junit:junit:4.12'
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androidTestImplementation 'com.android.support:support-annotations:27.1.0'
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androidTestImplementation 'com.android.support:support-annotations:27.1.1'
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androidTestImplementation 'com.android.support.test:runner:1.0.1'
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androidTestImplementation 'commons-net:commons-net:3.6'
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androidTestImplementation 'org.apache.commons:commons-lang3:3.7'
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@ -36,6 +36,7 @@ import android.hardware.usb.UsbManager;
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import android.support.test.InstrumentationRegistry;
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import android.support.test.runner.AndroidJUnit4;
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import android.util.Log;
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import android.os.Process;
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import com.hoho.android.usbserial.driver.CdcAcmSerialDriver;
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import com.hoho.android.usbserial.driver.Ch34xSerialDriver;
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@ -48,7 +49,6 @@ import com.hoho.android.usbserial.driver.UsbSerialPort;
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import com.hoho.android.usbserial.driver.UsbSerialProber;
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import com.hoho.android.usbserial.util.SerialInputOutputManager;
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import org.apache.commons.lang3.StringUtils;
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import org.apache.commons.net.telnet.InvalidTelnetOptionException;
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import org.apache.commons.net.telnet.TelnetClient;
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import org.apache.commons.net.telnet.TelnetCommand;
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@ -79,13 +79,15 @@ import static org.junit.Assert.fail;
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@RunWith(AndroidJUnit4.class)
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public class DeviceTest implements SerialInputOutputManager.Listener {
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private final static String rfc2217_server_host = "192.168.0.171";
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private final static String rfc2217_server_host = "192.168.0.100";
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private final static int rfc2217_server_port = 2217;
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private final static boolean rfc2217_server_nonstandard_baudrates = false; // false on Windows
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private final static boolean rfc2217_server_nonstandard_baudrates = false; // false on Windows, Raspi
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private final static boolean rfc2217_server_parity_mark_space = false; // false on Raspi
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private final static int TELNET_READ_WAIT = 500;
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private final static int USB_READ_WAIT = 500;
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private final static int USB_WRITE_WAIT = 500;
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private final static Integer SERIAL_INPUT_OUTPUT_MANAGER_THREAD_PRIORITY = Process.THREAD_PRIORITY_URGENT_AUDIO;
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private final static String TAG = "DeviceTest";
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private final static byte RFC2217_COM_PORT_OPTION = 0x2c;
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@ -101,6 +103,7 @@ public class DeviceTest implements SerialInputOutputManager.Listener {
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private SerialInputOutputManager usbIoManager;
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private final Deque<byte[]> usbReadBuffer = new LinkedList<>();
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private boolean usbReadBlock = false;
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private long usbReadTime = 0;
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private static TelnetClient telnetClient;
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private static InputStream telnetReadStream;
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@ -137,7 +140,7 @@ public class DeviceTest implements SerialInputOutputManager.Listener {
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@Before
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public void setUp() throws Exception {
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setUpFixtureInt();
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telnetClient.sendAYT(1000); // not corrctly handled by rfc2217_server.py, but WARNING output "ignoring Telnet command: '\xf6'" is a nice separator between tests
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telnetClient.sendAYT(1000); // not correctly handled by rfc2217_server.py, but WARNING output "ignoring Telnet command: '\xf6'" is a nice separator between tests
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telnetComPortOptionCounter[0] = 0;
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telnetWriteDelay = 0;
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@ -175,7 +178,15 @@ public class DeviceTest implements SerialInputOutputManager.Listener {
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usbSerialPort.open(usbDeviceConnection);
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usbSerialPort.setDTR(true);
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usbSerialPort.setRTS(true);
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usbIoManager = new SerialInputOutputManager(usbSerialPort, this);
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usbIoManager = new SerialInputOutputManager(usbSerialPort, this) {
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@Override
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public void run() {
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if(SERIAL_INPUT_OUTPUT_MANAGER_THREAD_PRIORITY != null)
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Process.setThreadPriority(SERIAL_INPUT_OUTPUT_MANAGER_THREAD_PRIORITY);
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super.run();
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}
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};
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Executors.newSingleThreadExecutor().submit(usbIoManager);
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synchronized (usbReadBuffer) {
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@ -263,7 +274,7 @@ public class DeviceTest implements SerialInputOutputManager.Listener {
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private byte[] usbRead(int expectedLength) throws Exception {
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long end = System.currentTimeMillis() + USB_READ_WAIT;
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ByteBuffer buf = ByteBuffer.allocate(4096);
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ByteBuffer buf = ByteBuffer.allocate(8192);
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if(usbIoManager != null) {
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while (System.currentTimeMillis() < end) {
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synchronized (usbReadBuffer) {
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@ -335,6 +346,16 @@ public class DeviceTest implements SerialInputOutputManager.Listener {
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@Override
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public void onNewData(byte[] data) {
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long now = System.currentTimeMillis();
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if(usbReadTime == 0)
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usbReadTime = now;
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if(data.length > 64) {
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Log.d(TAG, "usb read: time+=" + String.format("%-3d",now-usbReadTime) + " len=" + String.format("%-4d",data.length) + " data=" + new String(data, 0, 32) + "..." + new String(data, data.length-32, 32));
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} else {
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Log.d(TAG, "usb read: time+=" + String.format("%-3d",now-usbReadTime) + " len=" + String.format("%-4d",data.length) + " data=" + new String(data));
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}
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usbReadTime = now;
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while(usbReadBlock)
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try {
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Thread.sleep(1);
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@ -351,6 +372,32 @@ public class DeviceTest implements SerialInputOutputManager.Listener {
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assertTrue("usb connection lost", false);
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}
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// clone of org.apache.commons.lang3.StringUtils.indexOfDifference + optional startpos
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private static int indexOfDifference(final CharSequence cs1, final CharSequence cs2) {
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return indexOfDifference(cs1, cs2, 0, 0);
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}
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private static int indexOfDifference(final CharSequence cs1, final CharSequence cs2, int cs1startpos, int cs2startpos) {
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if (cs1 == cs2) {
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return -1;
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}
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if (cs1 == null || cs2 == null) {
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return 0;
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}
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if(cs1startpos < 0 || cs2startpos < 0)
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return -1;
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int i, j;
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for (i = cs1startpos, j = cs2startpos; i < cs1.length() && j < cs2.length(); ++i, ++j) {
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if (cs1.charAt(i) != cs2.charAt(j)) {
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break;
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}
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}
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if (j < cs2.length() || i < cs1.length()) {
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return i;
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}
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return -1;
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}
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@Test
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public void baudRate() throws Exception {
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@ -565,7 +612,7 @@ public class DeviceTest implements SerialInputOutputManager.Listener {
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if (usbSerialDriver instanceof CdcAcmSerialDriver) {
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// not supported by arduino_leonardo_bridge.ino, other devices might support it
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} else {
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} else if (rfc2217_server_parity_mark_space) {
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usbParameters(19200, 7, 1, UsbSerialPort.PARITY_MARK);
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usbWrite(_8n1);
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data = telnetRead(4);
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if (usbSerialDriver instanceof CdcAcmSerialDriver) {
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// not supported by arduino_leonardo_bridge.ino, other devices might support it
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} else {
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telnetParameters(19200, 7, 1, UsbSerialPort.PARITY_MARK);
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telnetWrite(_8n1);
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data = usbRead(4);
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assertThat("19200/7M1", data, equalTo(_7m1));
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telnetParameters(19200, 7, 1, UsbSerialPort.PARITY_SPACE);
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telnetWrite(_8n1);
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data = usbRead(4);
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assertThat("19200/7S1", data, equalTo(_7s1));
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if (rfc2217_server_parity_mark_space) {
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telnetParameters(19200, 7, 1, UsbSerialPort.PARITY_MARK);
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telnetWrite(_8n1);
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data = usbRead(4);
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assertThat("19200/7M1", data, equalTo(_7m1));
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telnetParameters(19200, 7, 1, UsbSerialPort.PARITY_SPACE);
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telnetWrite(_8n1);
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data = usbRead(4);
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assertThat("19200/7S1", data, equalTo(_7s1));
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}
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usbParameters(19200, 7, 1, UsbSerialPort.PARITY_ODD);
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telnetParameters(19200, 8, 1, UsbSerialPort.PARITY_NONE);
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telnetWrite(_8n1);
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@ -635,23 +683,23 @@ public class DeviceTest implements SerialInputOutputManager.Listener {
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// o - stop bit (1)
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// d - data bit
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// out 8N2: addddddd doadddddddoo
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// 1000001 0 1
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// in 6N1: addddddo adddddo
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// 100000 101
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// out 8N2: addddddd doaddddddddo
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// 1000001 0 10001111
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// in 6N1: addddddo addddddo
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// 100000 101000
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usbParameters(19200, 8, UsbSerialPort.STOPBITS_1, UsbSerialPort.PARITY_NONE);
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telnetParameters(19200, 6, 1, UsbSerialPort.PARITY_NONE);
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usbWrite(new byte[]{65, 1});
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usbWrite(new byte[]{(byte)0x41, (byte)0xf1});
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data = telnetRead(2);
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assertThat("19200/8N1", data, equalTo(new byte[]{1, 5}));
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// out 8N2: addddddd dooadddddddoo
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// 1000001 0 1
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// out 8N2: addddddd dooaddddddddoo
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// 1000001 0 10011111
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// in 6N1: addddddo addddddo
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// 100000 1101
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// 100000 110100
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usbParameters(19200, 8, UsbSerialPort.STOPBITS_2, UsbSerialPort.PARITY_NONE);
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telnetParameters(19200, 6, 1, UsbSerialPort.PARITY_NONE);
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usbWrite(new byte[]{65, 1});
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usbWrite(new byte[]{(byte)0x41, (byte)0xf9});
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data = telnetRead(2);
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assertThat("19200/8N1", data, equalTo(new byte[]{1, 11}));
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// todo: could create similar test for 1.5 stopbits, by reading at double speed
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@ -705,7 +753,7 @@ public class DeviceTest implements SerialInputOutputManager.Listener {
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Log.i(TAG, "bufferSize " + bufferSize);
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usbReadBlock = true;
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for (linenr = 0; linenr < bufferSize/8; linenr++) {
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line = String.format("%06d\r\n", linenr);
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line = String.format("%07d,", linenr);
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telnetWrite(line.getBytes());
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expected.append(line);
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}
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@ -714,7 +762,7 @@ public class DeviceTest implements SerialInputOutputManager.Listener {
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// slowly write new data, until old data is comletely read from buffer and new data is received again
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boolean found = false;
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for (; linenr < bufferSize/8 + maxWait/10 && !found; linenr++) {
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line = String.format("%06d\r\n", linenr);
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line = String.format("%07d,", linenr);
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telnetWrite(line.getBytes());
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Thread.sleep(10);
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expected.append(line);
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@ -731,7 +779,7 @@ public class DeviceTest implements SerialInputOutputManager.Listener {
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if (data.length() != expected.length())
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break;
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}
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int pos = StringUtils.indexOfDifference(data, expected);
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int pos = indexOfDifference(data, expected);
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Log.i(TAG, "bufferSize " + bufferSize + ", first difference at " + pos);
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// actual values have large variance for same device, e.g.
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// bufferSize 4096, first difference at 164
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@ -740,21 +788,30 @@ public class DeviceTest implements SerialInputOutputManager.Listener {
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assertTrue(data.length() != expected.length());
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}
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//
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// this test can fail sporadically!
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//
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// Android is not a real time OS, so there is no guarantee that the usb thread is scheduled, or it might be blocked by Java garbage collection.
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// The SerialInputOutputManager uses a buffer size of 4Kb. Reading of these blocks happen behind UsbRequest.queue / UsbDeviceConnection.requestWait
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// The dump of data and error positions in logcat show, that data is lost somewhere in the UsbRequest handling,
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// very likely when the individual 64 byte USB packets are not read fast enough, and the serial converter chip has to discard bytes.
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//
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// On some days SERIAL_INPUT_OUTPUT_MANAGER_THREAD_PRIORITY=THREAD_PRIORITY_URGENT_AUDIO reduced errors by factor 10, on other days it had no effect at all!
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//
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@Test
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// see logcat for performance results
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public void readSpeed() throws Exception {
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// see logcat for performance results
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//
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// CDC arduino_leonardo_bridge.ini has transfer speed ~ 100 byte/sec
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// all other devices are near physical limit with ~ 10-12k/sec
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int baudrate = 115200;
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usbParameters(baudrate, 8, 1, UsbSerialPort.PARITY_NONE);
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telnetParameters(baudrate, 8, 1, UsbSerialPort.PARITY_NONE);
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// CH340 w/o asyncReads (bulkTransfer) is much slower and fails reproducibly here
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// FTDI w/o asyncReads (bulkTransfer) does not continue to read after ~2k
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// CP2102 and PL2303 do not have data loss issues with bulkTransfer
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usbParameters(115200, 8, 1, UsbSerialPort.PARITY_NONE);
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telnetParameters(115200, 8, 1, UsbSerialPort.PARITY_NONE);
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// limited write ahead to avoid buffer overrun
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// with unlimited write ahead all devices fail sporadically. is it windows/device/usb-buffer overrun?
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int writeAhead = 2000;
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// fails more likely with larger or unlimited (-1) write ahead
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int writeSeconds = 5;
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int writeAhead = 5*baudrate/10; // write ahead for another 5 second read
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if(usbSerialDriver instanceof CdcAcmSerialDriver)
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writeAhead = 50;
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@ -763,14 +820,14 @@ public class DeviceTest implements SerialInputOutputManager.Listener {
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StringBuilder data = new StringBuilder();
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StringBuilder expected = new StringBuilder();
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int dlen = 0, elen = 0;
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Log.i(TAG, "readSpeed: 'in' should be near "+115200/10);
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Log.i(TAG, "readSpeed: 'read' should be near "+baudrate/10);
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long begin = System.currentTimeMillis();
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long next = System.currentTimeMillis();
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for(int seconds=1; seconds<=5; seconds++) {
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for(int seconds=1; seconds <= writeSeconds; seconds++) {
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next += 1000;
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while (System.currentTimeMillis() < next) {
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if(expected.length() < data.length() + writeAhead) {
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line = String.format("%06d\r\n", linenr++);
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if((writeAhead < 0) || (expected.length() < data.length() + writeAhead)) {
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line = String.format("%07d,", linenr++);
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telnetWrite(line.getBytes());
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expected.append(line);
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} else {
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@ -778,31 +835,55 @@ public class DeviceTest implements SerialInputOutputManager.Listener {
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}
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data.append(new String(usbRead(0)));
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}
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Log.i(TAG, "readSpeed: t="+(next-begin)+", in="+(data.length()-dlen)+", out="+(expected.length()-elen));
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Log.i(TAG, "readSpeed: t="+(next-begin)+", read="+(data.length()-dlen)+", write="+(expected.length()-elen));
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dlen = data.length();
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elen = expected.length();
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}
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boolean found = false;
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for (linenr=0; linenr < 2000 && !found; linenr++) {
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long maxwait = Math.max(1000, (expected.length() - data.length()) * 20000L / baudrate );
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next = System.currentTimeMillis() + maxwait;
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Log.d(TAG, "readSpeed: rest wait time " + maxwait + " for " + (expected.length() - data.length()) + " byte");
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while(!found && System.currentTimeMillis() < next) {
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data.append(new String(usbRead(0)));
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Thread.sleep(1);
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found = data.toString().endsWith(line);
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Thread.sleep(1);
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}
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next = System.currentTimeMillis();
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//Log.i(TAG, "readSpeed: t="+(next-begin)+", in="+(data.length()-dlen));
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assertTrue(found);
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int pos = StringUtils.indexOfDifference(data, expected);
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if(pos!=-1) {
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Log.i(TAG, "readSpeed: first difference at " + pos);
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String datasub = data.substring(Math.max(pos - 20, 0), Math.min(pos + 20, data.length()));
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String expectedsub = expected.substring(Math.max(pos - 20, 0), Math.min(pos + 20, expected.length()));
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assertThat(datasub, equalTo(expectedsub));
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//next = System.currentTimeMillis();
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//Log.i(TAG, "readSpeed: t="+(next-begin)+", read="+(data.length()-dlen));
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int errcnt = 0;
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int errlen = 0;
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int datapos = indexOfDifference(data, expected);
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int expectedpos = datapos;
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while(datapos != -1) {
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errcnt += 1;
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int nextexpectedpos = -1;
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int nextdatapos = datapos + 2;
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int len = -1;
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if(nextdatapos + 10 < data.length()) { // try to sync data+expected, assuming that data is lost, but not corrupted
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String nextsub = data.substring(nextdatapos, nextdatapos + 10);
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nextexpectedpos = expected.indexOf(nextsub, expectedpos);
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if(nextexpectedpos >= 0) {
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len = nextexpectedpos - expectedpos - 2;
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errlen += len;
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}
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}
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Log.i(TAG, "readSpeed: difference at " + datapos + " len " + len );
|
||||
Log.d(TAG, "readSpeed: got " + data.substring(Math.max(datapos - 20, 0), Math.min(datapos + 20, data.length())));
|
||||
Log.d(TAG, "readSpeed: expected " + expected.substring(Math.max(expectedpos - 20, 0), Math.min(expectedpos + 20, expected.length())));
|
||||
datapos = indexOfDifference(data, expected, nextdatapos, nextexpectedpos);
|
||||
expectedpos = nextexpectedpos + (datapos - nextdatapos);
|
||||
}
|
||||
if(errcnt != 0)
|
||||
Log.i(TAG, "readSpeed: got " + errcnt + " errors, total len " + errlen+ ", avg. len " + errlen/errcnt);
|
||||
assertTrue("end not found", found);
|
||||
assertEquals("no errors", 0, errcnt);
|
||||
}
|
||||
|
||||
@Test
|
||||
// see logcat for performance results
|
||||
public void writeSpeed() throws Exception {
|
||||
// see logcat for performance results
|
||||
//
|
||||
// CDC arduino_leonardo_bridge.ini has transfer speed ~ 100 byte/sec
|
||||
// all other devices can get near physical limit:
|
||||
// longlines=true:, speed is near physical limit at 11.5k
|
||||
|
@ -816,21 +897,21 @@ public class DeviceTest implements SerialInputOutputManager.Listener {
|
|||
StringBuilder data = new StringBuilder();
|
||||
StringBuilder expected = new StringBuilder();
|
||||
int dlen = 0, elen = 0;
|
||||
Log.i(TAG, "writeSpeed: 'out' should be near "+115200/10);
|
||||
Log.i(TAG, "writeSpeed: 'write' should be near "+115200/10);
|
||||
long begin = System.currentTimeMillis();
|
||||
long next = System.currentTimeMillis();
|
||||
for(int seconds=1; seconds<=5; seconds++) {
|
||||
next += 1000;
|
||||
while (System.currentTimeMillis() < next) {
|
||||
if(longlines)
|
||||
line = String.format("%060d\r\n", linenr++);
|
||||
line = String.format("%060d,", linenr++);
|
||||
else
|
||||
line = String.format("%06d\r\n", linenr++);
|
||||
line = String.format("%07d,", linenr++);
|
||||
usbWrite(line.getBytes());
|
||||
expected.append(line);
|
||||
data.append(new String(telnetRead(0)));
|
||||
}
|
||||
Log.i(TAG, "writeSpeed: t="+(next-begin)+", out="+(expected.length()-elen)+", in="+(data.length()-dlen));
|
||||
Log.i(TAG, "writeSpeed: t="+(next-begin)+", write="+(expected.length()-elen)+", read="+(data.length()-dlen));
|
||||
dlen = data.length();
|
||||
elen = expected.length();
|
||||
}
|
||||
|
@ -841,10 +922,11 @@ public class DeviceTest implements SerialInputOutputManager.Listener {
|
|||
found = data.toString().endsWith(line);
|
||||
}
|
||||
next = System.currentTimeMillis();
|
||||
Log.i(TAG, "writeSpeed: t="+(next-begin)+", in="+(data.length()-dlen));
|
||||
Log.i(TAG, "writeSpeed: t="+(next-begin)+", read="+(data.length()-dlen));
|
||||
assertTrue(found);
|
||||
int pos = StringUtils.indexOfDifference(data, expected);
|
||||
int pos = indexOfDifference(data, expected);
|
||||
if(pos!=-1) {
|
||||
|
||||
Log.i(TAG, "writeSpeed: first difference at " + pos);
|
||||
String datasub = data.substring(Math.max(pos - 20, 0), Math.min(pos + 20, data.length()));
|
||||
String expectedsub = expected.substring(Math.max(pos - 20, 0), Math.min(pos + 20, expected.length()));
|
||||
|
|
|
@ -191,23 +191,23 @@ public class Ch34xSerialDriver implements UsbSerialDriver {
|
|||
} finally {
|
||||
request.close();
|
||||
}
|
||||
}
|
||||
|
||||
final int numBytesRead;
|
||||
synchronized (mReadBufferLock) {
|
||||
int readAmt = Math.min(dest.length, mReadBuffer.length);
|
||||
numBytesRead = mConnection.bulkTransfer(mReadEndpoint, mReadBuffer, readAmt,
|
||||
timeoutMillis);
|
||||
if (numBytesRead < 0) {
|
||||
// This sucks: we get -1 on timeout, not 0 as preferred.
|
||||
// We *should* use UsbRequest, except it has a bug/api oversight
|
||||
// where there is no way to determine the number of bytes read
|
||||
// in response :\ -- http://b.android.com/28023
|
||||
return 0;
|
||||
} else {
|
||||
final int numBytesRead;
|
||||
synchronized (mReadBufferLock) {
|
||||
int readAmt = Math.min(dest.length, mReadBuffer.length);
|
||||
numBytesRead = mConnection.bulkTransfer(mReadEndpoint, mReadBuffer, readAmt,
|
||||
timeoutMillis);
|
||||
if (numBytesRead < 0) {
|
||||
// This sucks: we get -1 on timeout, not 0 as preferred.
|
||||
// We *should* use UsbRequest, except it has a bug/api oversight
|
||||
// where there is no way to determine the number of bytes read
|
||||
// in response :\ -- http://b.android.com/28023
|
||||
return 0;
|
||||
}
|
||||
System.arraycopy(mReadBuffer, 0, dest, 0, numBytesRead);
|
||||
}
|
||||
System.arraycopy(mReadBuffer, 0, dest, 0, numBytesRead);
|
||||
return numBytesRead;
|
||||
}
|
||||
return numBytesRead;
|
||||
}
|
||||
|
||||
@Override
|
||||
|
|
|
@ -26,9 +26,12 @@ import android.hardware.usb.UsbDevice;
|
|||
import android.hardware.usb.UsbDeviceConnection;
|
||||
import android.hardware.usb.UsbEndpoint;
|
||||
import android.hardware.usb.UsbInterface;
|
||||
import android.hardware.usb.UsbRequest;
|
||||
import android.os.Build;
|
||||
import android.util.Log;
|
||||
|
||||
import java.io.IOException;
|
||||
import java.nio.ByteBuffer;
|
||||
import java.util.Collections;
|
||||
import java.util.LinkedHashMap;
|
||||
import java.util.List;
|
||||
|
@ -101,11 +104,13 @@ public class Cp21xxSerialDriver implements UsbSerialDriver {
|
|||
private static final int CONTROL_WRITE_DTR = 0x0100;
|
||||
private static final int CONTROL_WRITE_RTS = 0x0200;
|
||||
|
||||
private final boolean mEnableAsyncReads;
|
||||
private UsbEndpoint mReadEndpoint;
|
||||
private UsbEndpoint mWriteEndpoint;
|
||||
|
||||
public Cp21xxSerialPort(UsbDevice device, int portNumber) {
|
||||
super(device, portNumber);
|
||||
mEnableAsyncReads = (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1);
|
||||
}
|
||||
|
||||
@Override
|
||||
|
@ -179,21 +184,47 @@ public class Cp21xxSerialDriver implements UsbSerialDriver {
|
|||
|
||||
@Override
|
||||
public int read(byte[] dest, int timeoutMillis) throws IOException {
|
||||
final int numBytesRead;
|
||||
synchronized (mReadBufferLock) {
|
||||
int readAmt = Math.min(dest.length, mReadBuffer.length);
|
||||
numBytesRead = mConnection.bulkTransfer(mReadEndpoint, mReadBuffer, readAmt,
|
||||
timeoutMillis);
|
||||
if (numBytesRead < 0) {
|
||||
// This sucks: we get -1 on timeout, not 0 as preferred.
|
||||
// We *should* use UsbRequest, except it has a bug/api oversight
|
||||
// where there is no way to determine the number of bytes read
|
||||
// in response :\ -- http://b.android.com/28023
|
||||
return 0;
|
||||
if (mEnableAsyncReads) {
|
||||
final UsbRequest request = new UsbRequest();
|
||||
try {
|
||||
request.initialize(mConnection, mReadEndpoint);
|
||||
final ByteBuffer buf = ByteBuffer.wrap(dest);
|
||||
if (!request.queue(buf, dest.length)) {
|
||||
throw new IOException("Error queueing request.");
|
||||
}
|
||||
|
||||
final UsbRequest response = mConnection.requestWait();
|
||||
if (response == null) {
|
||||
throw new IOException("Null response");
|
||||
}
|
||||
|
||||
final int nread = buf.position();
|
||||
if (nread > 0) {
|
||||
//Log.d(TAG, HexDump.dumpHexString(dest, 0, Math.min(32, dest.length)));
|
||||
return nread;
|
||||
} else {
|
||||
return 0;
|
||||
}
|
||||
} finally {
|
||||
request.close();
|
||||
}
|
||||
System.arraycopy(mReadBuffer, 0, dest, 0, numBytesRead);
|
||||
} else {
|
||||
final int numBytesRead;
|
||||
synchronized (mReadBufferLock) {
|
||||
int readAmt = Math.min(dest.length, mReadBuffer.length);
|
||||
numBytesRead = mConnection.bulkTransfer(mReadEndpoint, mReadBuffer, readAmt,
|
||||
timeoutMillis);
|
||||
if (numBytesRead < 0) {
|
||||
// This sucks: we get -1 on timeout, not 0 as preferred.
|
||||
// We *should* use UsbRequest, except it has a bug/api oversight
|
||||
// where there is no way to determine the number of bytes read
|
||||
// in response :\ -- http://b.android.com/28023
|
||||
return 0;
|
||||
}
|
||||
System.arraycopy(mReadBuffer, 0, dest, 0, numBytesRead);
|
||||
}
|
||||
return numBytesRead;
|
||||
}
|
||||
return numBytesRead;
|
||||
}
|
||||
|
||||
@Override
|
||||
|
|
|
@ -32,10 +32,13 @@ import android.hardware.usb.UsbDevice;
|
|||
import android.hardware.usb.UsbDeviceConnection;
|
||||
import android.hardware.usb.UsbEndpoint;
|
||||
import android.hardware.usb.UsbInterface;
|
||||
import android.hardware.usb.UsbRequest;
|
||||
import android.os.Build;
|
||||
import android.util.Log;
|
||||
|
||||
import java.io.IOException;
|
||||
import java.lang.reflect.Method;
|
||||
import java.nio.ByteBuffer;
|
||||
import java.util.Collections;
|
||||
import java.util.LinkedHashMap;
|
||||
import java.util.List;
|
||||
|
@ -109,6 +112,7 @@ public class ProlificSerialDriver implements UsbSerialDriver {
|
|||
|
||||
private int mDeviceType = DEVICE_TYPE_HX;
|
||||
|
||||
private final boolean mEnableAsyncReads;
|
||||
private UsbEndpoint mReadEndpoint;
|
||||
private UsbEndpoint mWriteEndpoint;
|
||||
private UsbEndpoint mInterruptEndpoint;
|
||||
|
@ -126,6 +130,7 @@ public class ProlificSerialDriver implements UsbSerialDriver {
|
|||
|
||||
public ProlificSerialPort(UsbDevice device, int portNumber) {
|
||||
super(device, portNumber);
|
||||
mEnableAsyncReads = (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1);
|
||||
}
|
||||
|
||||
@Override
|
||||
|
@ -368,15 +373,41 @@ public class ProlificSerialDriver implements UsbSerialDriver {
|
|||
|
||||
@Override
|
||||
public int read(byte[] dest, int timeoutMillis) throws IOException {
|
||||
synchronized (mReadBufferLock) {
|
||||
int readAmt = Math.min(dest.length, mReadBuffer.length);
|
||||
int numBytesRead = mConnection.bulkTransfer(mReadEndpoint, mReadBuffer,
|
||||
readAmt, timeoutMillis);
|
||||
if (numBytesRead < 0) {
|
||||
return 0;
|
||||
if (mEnableAsyncReads) {
|
||||
final UsbRequest request = new UsbRequest();
|
||||
try {
|
||||
request.initialize(mConnection, mReadEndpoint);
|
||||
final ByteBuffer buf = ByteBuffer.wrap(dest);
|
||||
if (!request.queue(buf, dest.length)) {
|
||||
throw new IOException("Error queueing request.");
|
||||
}
|
||||
|
||||
final UsbRequest response = mConnection.requestWait();
|
||||
if (response == null) {
|
||||
throw new IOException("Null response");
|
||||
}
|
||||
|
||||
final int nread = buf.position();
|
||||
if (nread > 0) {
|
||||
//Log.d(TAG, HexDump.dumpHexString(dest, 0, Math.min(32, dest.length)));
|
||||
return nread;
|
||||
} else {
|
||||
return 0;
|
||||
}
|
||||
} finally {
|
||||
request.close();
|
||||
}
|
||||
} else {
|
||||
synchronized (mReadBufferLock) {
|
||||
int readAmt = Math.min(dest.length, mReadBuffer.length);
|
||||
int numBytesRead = mConnection.bulkTransfer(mReadEndpoint, mReadBuffer,
|
||||
readAmt, timeoutMillis);
|
||||
if (numBytesRead < 0) {
|
||||
return 0;
|
||||
}
|
||||
System.arraycopy(mReadBuffer, 0, dest, 0, numBytesRead);
|
||||
return numBytesRead;
|
||||
}
|
||||
System.arraycopy(mReadBuffer, 0, dest, 0, numBytesRead);
|
||||
return numBytesRead;
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
@ -120,7 +120,6 @@ public class SerialInputOutputManager implements Runnable {
|
|||
* called, or until a driver exception is raised.
|
||||
*
|
||||
* NOTE(mikey): Uses inefficient read/write-with-timeout.
|
||||
* TODO(mikey): Read asynchronously with {@link UsbRequest#queue(ByteBuffer, int)}
|
||||
*/
|
||||
@Override
|
||||
public void run() {
|
||||
|
|
Ładowanie…
Reference in New Issue