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README with SerialInputOutputManager for read() and port for write()

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test the usually not used read/write variants
This commit is contained in:
Kai Morich
2019-10-26 21:32:28 +02:00
parent 800381e370
commit b3631dff58
4 changed files with 152 additions and 106 deletions
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usbSerialForAndroid/src/androidTest/java/com/hoho/android/usbserial/DeviceTest.java
+106 -18
View File
@@ -194,22 +194,7 @@ public class DeviceTest implements SerialInputOutputManager.Listener {
try {
telnetRead(0);
} catch (Exception ignored) {}
try {
usbIoManager.setListener(null);
usbIoManager.stop();
} catch (Exception ignored) {}
try {
usbSerialPort.setDTR(false);
usbSerialPort.setRTS(false);
usbSerialPort.close();
} catch (Exception ignored) {}
try {
usbDeviceConnection.close();
} catch (Exception ignored) {}
usbIoManager = null;
usbSerialPort = null;
usbDeviceConnection = null;
usbClose();
usbSerialDriver = null;
}
@@ -261,10 +246,15 @@ public class DeviceTest implements SerialInputOutputManager.Listener {
private void usbClose() {
if (usbIoManager != null) {
usbIoManager.setListener(null);
usbIoManager.stop();
usbIoManager = null;
}
if (usbSerialPort != null) {
try {
usbSerialPort.setDTR(false);
usbSerialPort.setRTS(false);
} catch (Exception ignored) {
}
try {
usbSerialPort.close();
} catch (IOException ignored) {
@@ -274,6 +264,18 @@ public class DeviceTest implements SerialInputOutputManager.Listener {
if(usbDeviceConnection != null)
usbDeviceConnection.close();
usbDeviceConnection = null;
if(usbIoManager != null) {
for(int i=0; i<2000; i++) {
if(SerialInputOutputManager.State.STOPPED == usbIoManager.getState()) break;
try {
Thread.sleep(1);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
assertEquals(SerialInputOutputManager.State.STOPPED, usbIoManager.getState());
usbIoManager = null;
}
}
private void usbOpen(boolean withIoManager) throws Exception {
@@ -520,6 +522,11 @@ public class DeviceTest implements SerialInputOutputManager.Listener {
usbSerialPort.close();
} catch (IOException ignored) {
}
if (usbSerialDriver instanceof Cp21xxSerialDriver) { // why needed?
usbIoManager.stop();
usbIoManager = null;
}
// full re-open supported
usbClose();
usbOpen(true);
@@ -640,8 +647,8 @@ public class DeviceTest implements SerialInputOutputManager.Listener {
assertNotEquals(data1, buf1);
assertNotEquals(data2, buf2);
}
assertThat("42000/8N1", data1, equalTo(buf1));
} else {
assertThat("42000/8N1", data1, equalTo(buf1));
assertThat("42000/8N1", data2, equalTo(buf2));
}
}
@@ -1109,4 +1116,85 @@ public class DeviceTest implements SerialInputOutputManager.Listener {
// todo: purge receive buffer
}
@Test
// WriteAsync rarely makes sense, as data is not written until something is read
public void writeAsync() throws Exception {
if (usbSerialDriver instanceof FtdiSerialDriver)
return; // periodically sends status messages, so does not block here
usbParameters(19200, 8, 1, UsbSerialPort.PARITY_NONE);
telnetParameters(19200, 8, 1, UsbSerialPort.PARITY_NONE);
SerialInputOutputManager ioManager;
ioManager = new SerialInputOutputManager(null);
assertEquals(null, ioManager.getListener());
ioManager.setListener(this);
assertEquals(this, ioManager.getListener());
ioManager = new SerialInputOutputManager(null, this);
assertEquals(this, ioManager.getListener());
byte[] data, buf = new byte[]{1};
int len;
usbIoManager.writeAsync(buf);
usbIoManager.writeAsync(buf);
data = telnetRead(1);
assertEquals(0, data.length);
telnetWrite(buf);
data = usbRead(1);
assertEquals(1, data.length);
data = telnetRead(2);
assertEquals(2, data.length);
}
@Test
// Blocking read should be avoided in the UI thread, as it makes the app unresponsive.
// You better use the SerialInputOutputManager.
//
// With the change from bulkTransfer to queued requests, the read timeout has no effect
// and the call blocks until close() if no data is available!
// The change from bulkTransfer to queued requests was necessary to prevent data loss.
public void readSync() throws Exception {
if (usbSerialDriver instanceof FtdiSerialDriver)
return; // periodically sends status messages, so does not block here
Runnable closeThread = new Runnable() {
@Override
public void run() {
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
usbClose();
}
};
usbClose();
usbOpen(false);
usbParameters(19200, 8, 1, UsbSerialPort.PARITY_NONE);
telnetParameters(19200, 8, 1, UsbSerialPort.PARITY_NONE);
byte[] buf = new byte[]{1};
int len;
long time;
telnetWrite(buf);
len = usbSerialPort.read(buf, 0); // not blocking because data is available
assertEquals(1, len);
time = System.currentTimeMillis();
Executors.newSingleThreadExecutor().submit(closeThread);
len = usbSerialPort.read(buf, 0); // blocking until close()
assertEquals(0, len);
assertTrue(System.currentTimeMillis()-time >= 100);
usbOpen(false);
usbParameters(19200, 8, 1, UsbSerialPort.PARITY_NONE);
telnetParameters(19200, 8, 1, UsbSerialPort.PARITY_NONE);
time = System.currentTimeMillis();
Executors.newSingleThreadExecutor().submit(closeThread);
len = usbSerialPort.read(buf, 10); // timeout not used any more -> blocking until close()
assertEquals(0, len);
assertTrue(System.currentTimeMillis()-time >= 100);
}
}
usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/util/SerialInputOutputManager.java
+2 -2
View File
@@ -50,7 +50,7 @@ public class SerialInputOutputManager implements Runnable {
// Synchronized by 'mWriteBuffer'
private final ByteBuffer mWriteBuffer = ByteBuffer.allocate(BUFSIZ);
private enum State {
public enum State {
STOPPED,
RUNNING,
STOPPING
@@ -111,7 +111,7 @@ public class SerialInputOutputManager implements Runnable {
}
}
private synchronized State getState() {
public synchronized State getState() {
return mState;
}