bool AndroidAccessory::isConnected(void)
{
USB_DEVICE_DESCRIPTOR *devDesc = (USB_DEVICE_DESCRIPTOR *) descBuff;
byte err;
refresh();
if (!connected &&
usb.getUsbTaskState() >= USB_STATE_CONFIGURING &&
usb.getUsbTaskState() != USB_STATE_RUNNING) {
Serial.print(F("\nDevice addressed... "));
Serial.print(F("Requesting device descriptor.\n"));
err = usb.getDevDescr(1, 0, 0x12, (char *) devDesc);
if (err) {
Serial.print(F("\nDevice descriptor cannot be retrieved. Trying again\n"));
return false;
}
if (isAccessoryDevice(devDesc)) {
Serial.print(F("found android acessory device\n"));
connected = configureAndroid();
} else {
Serial.print(F("found possible device. swithcing to serial mode\n"));
switchDevice(1);
}
} else if (usb.getUsbTaskState() == USB_DETACHED_SUBSTATE_WAIT_FOR_DEVICE) {
if (connected)
Serial.println(F("disconnect\n"));
connected = false;
}
return connected;
}
bool AndroidAccessory::connect() {
USB_DEVICE_DESCRIPTOR *devDesc = (USB_DEVICE_DESCRIPTOR *) descBuff;
byte err = usb.getDevDescr(1, 0, 0x12, (char *) devDesc);
if (err) {
return false;
}
if (isAccessoryDevice(devDesc)) {
return configureAndroid();
} else {
switchDevice(1);
}
return false;
}
//*****************************************************************************
//
//! This function is used to open an instance of the ANDROID driver and configure it as Open Accessory.
//!
//! \param pDevice is a pointer to the device information structure.
//!
//! This function will attempt to open an instance of the ANDROID driver based on
//! the information contained in the pDevice structure. This call can fail if
//! there are not sufficient resources to open the device. The function will
//! return a value that should be passed back into USBANDROIDClose() when the
//! driver is no longer needed.
//!
//! \return The function will return a pointer to a ANDROID driver instance.
//
//*****************************************************************************
static void * USBHANDROIDOpen(tUSBHostDevice *pDevice)
{
int iIdx;
tEndpointDescriptor *pEndpointDescriptor;
tInterfaceDescriptor *pInterface;
UARTprintf("\nStart USBHANDROIDOpen Time=%d\n", g_ulSysTickCount);
/* For Debug purpose you can also list full Configuration Descriptor & Device Descriptor */
getConfigDesc(pDevice);
getDeviceDesc(pDevice);
/*
UARTprintf("Start pDevice->pConfigDescriptor details Time=%d:\n", g_ulSysTickCount);
UARTprintf(" bLength=0x%02X (shall be 0x09)\n", pDevice->pConfigDescriptor->bLength);
UARTprintf(" wTotalLength=0x%04X\n", pDevice->pConfigDescriptor->wTotalLength);
UARTprintf(" bDescriptorType=0x%02X\n", pDevice->pConfigDescriptor->bDescriptorType);
UARTprintf(" bNumInterfaces=0x%02X\n", pDevice->pConfigDescriptor->bNumInterfaces);
UARTprintf(" bConfigurationValue=0x%02X\n", pDevice->pConfigDescriptor->bConfigurationValue);
UARTprintf(" iConfiguration=0x%02X\n", pDevice->pConfigDescriptor->iConfiguration);
UARTprintf(" bmAttributes=0x%02X\n", pDevice->pConfigDescriptor->bmAttributes);
UARTprintf(" bMaxPower=0x%02X (unit of 2mA)\n\n", pDevice->pConfigDescriptor->bMaxPower);
UARTprintf("pDevice->DeviceDescriptor details:\n");
UARTprintf(" bLength=0x%02X (shall be 0x12)\n", pDevice->DeviceDescriptor.bLength);
UARTprintf(" bDescriptorType=0x%02X\n", pDevice->DeviceDescriptor.bDescriptorType);
UARTprintf(" bcdUSB=0x%02X (USB2.0=0x200)\n", pDevice->DeviceDescriptor.bcdUSB);
UARTprintf(" bDeviceClass=0x%02X\n", pDevice->DeviceDescriptor.bDeviceClass);
UARTprintf(" bDeviceSubClass=0x%02X\n", pDevice->DeviceDescriptor.bDeviceSubClass);
UARTprintf(" bDeviceProtocol=0x%02X\n", pDevice->DeviceDescriptor.bDeviceProtocol);
UARTprintf(" bMaxPacketSize0=0x%02X\n", pDevice->DeviceDescriptor.bMaxPacketSize0);
UARTprintf(" idVendor=0x%02X\n", pDevice->DeviceDescriptor.idVendor);
UARTprintf(" idProduct=0x%02X\n", pDevice->DeviceDescriptor.idProduct);
UARTprintf(" bcdDevice=0x%02X\n", pDevice->DeviceDescriptor.bcdDevice);
UARTprintf(" iManufacturer=0x%02X\n", pDevice->DeviceDescriptor.iManufacturer);
UARTprintf(" iProduct=0x%02X\n", pDevice->DeviceDescriptor.iProduct);
UARTprintf(" iSerialNumber=0x%02X\n", pDevice->DeviceDescriptor.iSerialNumber);
UARTprintf(" bNumConfigurations=0x%02X\n", pDevice->DeviceDescriptor.bNumConfigurations);
UARTprintf("End pDevice->pConfigDescriptor details Time=%d:\n\n", g_ulSysTickCount);
*/
// Don't allow the device to be opened without closing first.
if(g_USBHANDROIDDevice.pDevice)
{
UARTprintf("\nUSBHANDROIDOpen return 0 device already opened\n");
return(0);
}
// Save the device pointer.
g_USBHANDROIDDevice.pDevice = pDevice;
// Save the callback.
// The CallBack is the driver callback for any Android ADK events.
//
// This function is called to open an instance of an android device. It
// should be called before any devices are connected to allow for proper
// notification of android connection and disconnection. The
// application should also provide the \e pfnCallback to be notified of Andoid
// ADK related events like device enumeration and device removal.
g_USBHANDROIDDevice.pfnCallback = USBHANDROIDCallback;
/* Check Android Accessory device */
if (isAccessoryDevice(&pDevice->DeviceDescriptor))
{
UARTprintf("Found Android Accessory device Time=%d\n", g_ulSysTickCount);
// Get the interface descriptor.
pInterface = USBDescGetInterface(pDevice->pConfigDescriptor, 0, 0);
// Loop through the endpoints of the device.
for(iIdx = 0; iIdx < 3; iIdx++)
{
// Get the first endpoint descriptor.
pEndpointDescriptor =
USBDescGetInterfaceEndpoint(pInterface, iIdx,
pDevice->ulConfigDescriptorSize);
UARTprintf("\nEndpoint%d USBDescGetInterfaceEndpoint()=pEndpointDescriptor res=0x%08X\n", iIdx, pEndpointDescriptor);
// If no more endpoints then break out.
if(pEndpointDescriptor == 0)
{
break;
}
UARTprintf("pEndpointDescriptor details:\n");
UARTprintf(" bLength=0x%02X (shall be 0x07)\n", pEndpointDescriptor->bLength);
UARTprintf(" bDescriptorType=0x%02X\n", pEndpointDescriptor->bDescriptorType);
UARTprintf(" bEndpointAddress=0x%02X\n", pEndpointDescriptor->bEndpointAddress);
UARTprintf(" bmAttributes=0x%02X (0x00=CTRL, 0x01=ISOC, 0x02=BULK, 0x03=INT\n", pEndpointDescriptor->bmAttributes);
UARTprintf(" wMaxPacketSize=0x%04X\n", pEndpointDescriptor->wMaxPacketSize);
UARTprintf(" bInterval=0x%04X\n", pEndpointDescriptor->bInterval);
// See if this is a bulk endpoint.
if((pEndpointDescriptor->bmAttributes & USB_EP_ATTR_TYPE_M) ==
USB_EP_ATTR_BULK)
{
// See if this is bulk IN or bulk OUT.
if(pEndpointDescriptor->bEndpointAddress & USB_EP_DESC_IN)
{
UARTprintf("Endpoint Bulk In alloc USB Pipe\n");
// Allocate the USB Pipe for this Bulk IN endpoint.
g_USBHANDROIDDevice.ulBulkInPipe = USBHCDPipeAllocSize(0, USBHCD_PIPE_BULK_IN_DMA,
pDevice->ulAddress,
pEndpointDescriptor->wMaxPacketSize,
0);
// Configure the USB pipe as a Bulk IN endpoint.
USBHCDPipeConfig(g_USBHANDROIDDevice.ulBulkInPipe,
pEndpointDescriptor->wMaxPacketSize,
BULK_READ_TIMEOUT,
(pEndpointDescriptor->bEndpointAddress &
USB_EP_DESC_NUM_M));
}
else
{
UARTprintf("Endpoint Bulk OUT alloc USB Pipe\n");
// Allocate the USB Pipe for this Bulk OUT endpoint.
g_USBHANDROIDDevice.ulBulkOutPipe = USBHCDPipeAllocSize(0, USBHCD_PIPE_BULK_OUT_DMA,
pDevice->ulAddress,
pEndpointDescriptor->wMaxPacketSize,
0);
// Configure the USB pipe as a Bulk OUT endpoint.
USBHCDPipeConfig(g_USBHANDROIDDevice.ulBulkOutPipe,
pEndpointDescriptor->wMaxPacketSize,
BULK_WRITE_TIMEOUT,
(pEndpointDescriptor->bEndpointAddress &
USB_EP_DESC_NUM_M));
}
}
}
// If the callback exists, call it with an Open event.
if(g_USBHANDROIDDevice.pfnCallback != 0)
{
g_USBHANDROIDDevice.pfnCallback((t_u32)&g_USBHANDROIDDevice,
ANDROID_EVENT_OPEN, 0);
}
// Set Flag isConnected
g_USBHANDROIDDevice.connected = true;
} else
{
UARTprintf("Found possible device. switching to serial mode Time=%d\n", g_ulSysTickCount);
switchDevice(pDevice);
// Set Flag isConnected
g_USBHANDROIDDevice.connected = false;
}
UARTprintf("\nEnd USBHANDROIDOpen Time=%d\n", g_ulSysTickCount);
// Return the only instance of this device.
return(&g_USBHANDROIDDevice);
}