Databases
StackOverflow2013
Postsdbo
POAndroid Host API communicating with a device
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POAndroid Host API communicating with a device
    primarykey
    data
    text
    <p>I need to communicate with a USB communicate device using android host API</p> <p>This is the information of the device I'm working with. </p> <p>lsusb -v -d PID:VID</p> <p>Bus 003 Device 007: ID PIDVID VOTI </p> <p>Device Descriptor:</p> <pre><code>bLength 18 bDescriptorType 1 bcdUSB 1.01 bDeviceClass 2 Communications bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 8 idVendor PID VOTI idProduct VID bcdDevice 1.00 iManufacturer 1 iProduct 2 iSerial 0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 67 bNumInterfaces 2 bConfigurationValue 1 iConfiguration 0 bmAttributes 0x80 (Bus Powered) MaxPower 100mA </code></pre> <p>Interface Descriptor:</p> <pre><code> bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 1 bInterfaceClass 2 Communications bInterfaceSubClass 2 Abstract (modem) bInterfaceProtocol 1 AT-commands (v.25ter) iInterface 0 CDC Header: bcdCDC 1.10 CDC ACM: bmCapabilities 0x02 line coding and serial state CDC Union: bMasterInterface 0 bSlaveInterface 1 CDC Call Management: bmCapabilities 0x03 call management use DataInterface bDataInterface 1 </code></pre> <p>Endpoint Descriptor:</p> <pre><code> bLength 7 bDescriptorType 5 bEndpointAddress 0x83 EP 3 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0008 1x 8 bytes bInterval 100 </code></pre> <p>Interface Descriptor:</p> <pre><code> bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 0 bNumEndpoints 2 bInterfaceClass 10 CDC Data bInterfaceSubClass 0 Unused bInterfaceProtocol 0 iInterface 0 </code></pre> <p>Endpoint Descriptor:</p> <pre><code> bLength 7 bDescriptorType 5 bEndpointAddress 0x01 EP 1 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0006 1x 6 bytes bInterval 0 </code></pre> <p>Endpoint Descriptor:</p> <pre><code> bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0008 1x 8 bytes bInterval 0 </code></pre> <p>Now I can discover the device and obtain permission to communicate with the device. But when I try to communicate with the device using bulkTransfer() function, it always return -1.</p> <p>Here is the code</p> <pre><code>UsbDeviceConnection conn = mUsbManager.openDevice(mDevice); conn.controlTransfer(33, 34, 0, 0, null, 0, 0); byte[] buffer = new byte[]{ (byte) 0x80,0x25, 0x00, 0x00, 0x00, 0x00, 0x08 }; conn.controlTransfer(33, 32, 0, 0, buffer , 7, 0); //8N1, 9600 baud conn.bulkTransfer(epOUT, new byte[]{msData}, 1, 0); UsbEndpoint epIN = null; UsbEndpoint epOUT = null; UsbInterface usbIf = mDevice.getInterface(1); for (int i = 0; i &lt; usbIf.getEndpointCount(); i++) { if (usbIf.getEndpoint(i).getType() == UsbConstants.USB_ENDPOINT_XFER_BULK) { if (usbIf.getEndpoint(i).getDirection() == UsbConstants.USB_DIR_IN) epIN = usbIf.getEndpoint(i); else epOUT = usbIf.getEndpoint(i); } } for (;;) {// this is the main loop for transferring synchronized (sSendLock) {//ok there should be a OUT queue try { sSendLock.wait(); } catch (InterruptedException e) { if (mStop) { mConnectionHandler.onUsbStopped(); return; } e.printStackTrace(); } } conn.bulkTransfer(epOUT, new byte[] { mData }, 1, 0); if (mStop) { mConnectionHandler.onUsbStopped(); return; } } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USkiritsuku
    1. USGaoHe
    plurals
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POAndroid Host API communicating with a device
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    1. COIt is really hard to understand your question and your needs. Where is the problem, where are you blocked???
      singulars
      1. POAndroid Host API communicating with a device
      1. USMiloš
    2. COI can't communicate with the device using Android Host
      singulars
      1. POAndroid Host API communicating with a device
      1. USGaoHe
    3. CO@GaoHe Did you manage solve this issue?
      singulars
      1. POAndroid Host API communicating with a device
      1. USuser427969
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload