/* This code shows an example of Audio v1.0 Attach Event Handler and how this
 * attach event handler can be registered with the Audio v1.0 Host Client Driver */
bool isAudioDeviceAttached = false;
USB_HOST_AUDIO_V1_0_OBJ audioDeviceObj;

/* Audio attach event listener function */
void APP_USBHostAudioAttachEventListener
(
    USB_HOST_AUDIO_V1_0_OBJ audioObj,
    USB_HOST_AUDIO_V1_0_EVENT event,
    uintptr_t context
)
{
    /* This function gets called when the Audio v1.0 device is attached/detached. In this
     * example we let the application know that a device is attached and we
     * store the Audio v1.0 device object. This object will be required to open the
     * device. */
    switch (event)
    {
        case USB_HOST_AUDIO_V1_0_EVENT_ATTACH:
            if (isAudioDeviceAttached == false)
            {
                isAudioDeviceAttached = true;
                audioDeviceObj = audioObj;
            }
            else
            {
                /* This application supports only one Audio Device . Handle Error Here.*/
            }
        break;
        case USB_HOST_AUDIO_V1_0_EVENT_DETACH:
            if (isAudioDeviceAttached == true)
            {
                /* This means the device was detached. There is no event data
                 * associated with this event.*/
                isAudioDeviceAttached = false;
                break;
            }
        break;
    }
}


void APP_Tasks(void)
{
    switch (appData.state)
    {
        case APP_STATE_BUS_ENABLE:

            /* In this state the application enables the USB Host Bus. Note
             * how the Audio v1.0 Attach event handler is registered before the bus
             * is enabled. */

            USB_HOST_AUDIO_V1_0_AttachEventHandlerSet(APP_USBHostAudioAttachEventListener, (uintptr_t) 0);
            USB_HOST_BusEnable(0);
            appData.state = APP_STATE_WAIT_FOR_BUS_ENABLE_COMPLETE;
            break;

        case APP_STATE_WAIT_FOR_BUS_ENABLE_COMPLETE:
            /* Here we wait for the bus enable operation to complete. */
            break;
    }
}