flywithu/usb-serial-for-android
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Code Issues Releases Wiki Activity

support USB devices with other non CDC related endpoints, e.g. when using ARM mbed DAPLink firmware

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This commit is contained in:
Kai Morich 2017-02-17 22:03:32 +01:00
parent b96f9ca7a2
commit 608c67499a
2 changed files with 55 additions and 15 deletions
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66
usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/CdcAcmSerialDriver.java
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@ -77,6 +77,8 @@ public class CdcAcmSerialDriver implements UsbSerialDriver {
private UsbEndpoint mReadEndpoint;
private UsbEndpoint mWriteEndpoint;
private int mControlIndex;
private boolean mRts = false;
private boolean mDtr = false;
@ -139,6 +141,7 @@ public class CdcAcmSerialDriver implements UsbSerialDriver {
// the following code is inspired by the cdc-acm driver
// in the linux kernel
mControlIndex = 0;
mControlInterface = mDevice.getInterface(0);
Log.d(TAG, "Control iface=" + mControlInterface);
@ -196,34 +199,63 @@ public class CdcAcmSerialDriver implements UsbSerialDriver {
private void openInterface() throws IOException {
Log.d(TAG, "claiming interfaces, count=" + mDevice.getInterfaceCount());
mControlInterface = mDevice.getInterface(0);
mControlInterface = null;
mDataInterface = null;
for (int i = 0; i < mDevice.getInterfaceCount(); i++) {
UsbInterface usbInterface = mDevice.getInterface(i);
if (usbInterface.getInterfaceClass() == UsbConstants.USB_CLASS_COMM) {
mControlIndex = i;
mControlInterface = usbInterface;
}
if (usbInterface.getInterfaceClass() == UsbConstants.USB_CLASS_CDC_DATA) {
mDataInterface = usbInterface;
}
}
if(mControlInterface == null) {
throw new IOException("no control interface.");
}
Log.d(TAG, "Control iface=" + mControlInterface);
// class should be USB_CLASS_COMM
if (!mConnection.claimInterface(mControlInterface, true)) {
throw new IOException("Could not claim control interface.");
}
mControlEndpoint = mControlInterface.getEndpoint(0);
Log.d(TAG, "Control endpoint direction: " + mControlEndpoint.getDirection());
if (mControlEndpoint.getDirection() != UsbConstants.USB_DIR_IN || mControlEndpoint.getType() != UsbConstants.USB_ENDPOINT_XFER_INT) {
throw new IOException("invalid control endpoint");
}
Log.d(TAG, "Claiming data interface.");
mDataInterface = mDevice.getInterface(1);
if(mDataInterface == null) {
throw new IOException("no data interface.");
}
Log.d(TAG, "data iface=" + mDataInterface);
// class should be USB_CLASS_CDC_DATA
if (!mConnection.claimInterface(mDataInterface, true)) {
throw new IOException("Could not claim data interface.");
}
mReadEndpoint = mDataInterface.getEndpoint(1);
Log.d(TAG, "Read endpoint direction: " + mReadEndpoint.getDirection());
mWriteEndpoint = mDataInterface.getEndpoint(0);
Log.d(TAG, "Write endpoint direction: " + mWriteEndpoint.getDirection());
mReadEndpoint = null;
mWriteEndpoint = null;
for (int i = 0; i < mDataInterface.getEndpointCount(); i++) {
UsbEndpoint ep = mDataInterface.getEndpoint(i);
if (ep.getDirection() == UsbConstants.USB_DIR_IN && ep.getType() == UsbConstants.USB_ENDPOINT_XFER_BULK)
mReadEndpoint = ep;
if (ep.getDirection() == UsbConstants.USB_DIR_OUT && ep.getType() == UsbConstants.USB_ENDPOINT_XFER_BULK)
mWriteEndpoint = ep;
}
if (mReadEndpoint == null || mWriteEndpoint == null) {
throw new IOException("Could not get read&write endpoints.");
}
}
private int sendAcmControlMessage(int request, int value, byte[] buf) {
return mConnection.controlTransfer(
USB_RT_ACM, request, value, 0, buf, buf != null ? buf.length : 0, 5000);
private int sendAcmControlMessage(int request, int value, byte[] buf) throws IOException {
int len = mConnection.controlTransfer(
USB_RT_ACM, request, value, mControlIndex, buf, buf != null ? buf.length : 0, 5000);
if(len < 0) {
throw new IOException("controlTransfer failed.");
}
return len;
}
@Override
@ -320,7 +352,7 @@ public class CdcAcmSerialDriver implements UsbSerialDriver {
}
@Override
public void setParameters(int baudRate, int dataBits, int stopBits, int parity) {
public void setParameters(int baudRate, int dataBits, int stopBits, int parity) throws IOException {
byte stopBitsByte;
switch (stopBits) {
case STOPBITS_1: stopBitsByte = 0; break;
@ -392,7 +424,7 @@ public class CdcAcmSerialDriver implements UsbSerialDriver {
setDtrRts();
}
private void setDtrRts() {
private void setDtrRts() throws IOException {
int value = (mRts ? 0x2 : 0) | (mDtr ? 0x1 : 0);
sendAcmControlMessage(SET_CONTROL_LINE_STATE, value, null);
}
@ -426,6 +458,10 @@ public class CdcAcmSerialDriver implements UsbSerialDriver {
new int[] {
UsbId.LEAFLABS_MAPLE,
});
supportedDevices.put(Integer.valueOf(UsbId.VENDOR_ARM),
new int[] {
UsbId.ARM_MBED,
});
return supportedDevices;
}

4
usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/UsbId.java
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@ -68,6 +68,10 @@ public final class UsbId {
public static final int VENDOR_QINHENG = 0x1a86;
public static final int QINHENG_HL340 = 0x7523;
// at www.linux-usb.org/usb.ids listed for NXP/LPC1768, but all processors supported by ARM mbed DAPLink firmware report these ids
public static final int VENDOR_ARM = 0x0d28;
public static final int ARM_MBED = 0x0204;
private UsbId() {
throw new IllegalAccessError("Non-instantiable class.");
}