ADB::poll() and delay(500)

There is a delay(500) in the ADB::poll() method in Adb.cpp.

Since poll() is typically executed inside the main loop, I suggest to remove 
the delay or replace it with a return statement.

I haven't tested it yet so I'd appreciate your comments.

void ADB::poll()
{
    Connection * connection;
    adb_message message;

    // Poll the USB layer.
    USB::poll();

    // If no USB device, there's no work for us to be done, so just return.
    if (adbDevice==NULL) return;

    // If not connected, send a connection string to the device.
    if (!connected)
    {
        ADB::writeStringMessage(adbDevice, A_CNXN, 0x01000000, 4096, (char*)"host::microbridge");
        delay(500); // Give the device some time to respond.
    }

    // If we are connected, check if there are connections that need to be opened
    if (connected)
        ADB::openClosedConnections();

    // Check for an incoming ADB message.
    if (!ADB::pollMessage(&message, true))
        return;

    // Handle a response from the ADB device to our CONNECT message.
    if (message.command == A_CNXN)
        ADB::handleConnect(&message);

    // Handle messages for specific connections
    for (connection = firstConnection; connection != NULL; connection = connection->next)
    {
        if (connection->status!=ADB_UNUSED && connection->localID==message.arg1)
        {
            switch(message.command)
            {
            case A_OKAY:
                ADB::handleOkay(connection, &message);
                break;
            case A_CLSE:
                ADB::handleClose(connection);
                break;
            case A_WRTE:
                ADB::handleWrite(connection, &message);
                break;
            default:
                break;
            }
        }
    }

}
Original issue reported on code.google.com by josema...@alcerreca.com on 20 Sep 2011 at 2:50
DoctorWho8 / microbridge

ADB::poll() and delay(500) #7
