Flexible mobile device connectivity to automotive systems with USB Hubs
A method to enable a vehicle's embedded USB Host system to connect to multiple mobile devices through a USB Hub, regardless of whether the mobile devices are configured to act as USB Hosts or USB Devices, without OTG controllers or additional vehicle wiring, or inhibiting the functionality of any consumer devices connected to the same USB Hub. Preferably, the method is configured to provide that no additional cabling is required, and no hardware changes are required to be made to the HU. The method can be employed between a vehicle's embedded USB Host, USB Hub and at least one consumer accessible USB port. In the case where the consumer device is acting as a USB Host, signals between the consumer device and the vehicle's embedded USB Host are processed through a USB bridge, thereby rendering the consumer device compatible with the vehicle's embedded USB Host.
1. A method of supporting data communication between a USB host and a USB enabled consumer device capable of operating in either a USB host mode or in a USB device mode, said method comprising the steps of:
providing a USB hub having a plurality of USB ports interconnected to the USB host, said USB hub configured to simultaneously broadcast data from the USB host to each USB port in the plurality of USB ports and to transmit data from each USB port to the USB Host;
providing a USB bridge interconnected to the USB hub and configured to connect the USB host to a second USB host;
providing a USB routing switch interconnected to the USB bridge, the USB hub, and the plurality of USB ports;
automatically configuring the USB routing switch to connect a first USB Port of the plurality of USB ports to the USB hub through the USB bridge when a consumer device connected to the USB host mode port is the second USB host; and
automatically configuring the USB routing switch to initiate bidirectional communication with the USB host, wherein the USB routing switch is configured to connect the first USB port directly to the USB hub when the consumer device connected to the first USB port is configured to only respond to communication from the USB host, thereby rendering the consumer device compatible with the USB host.
2. The method according to claim 1 , further comprising the steps of:
determining, via the USB routing switch, if the consumer device is operating in a USB host mode or in a USB device mode;
connecting the consumer device to the USB hub through the USB routing switch and the USB bridge when the USB routing switch determines the consumer device is in the USB host mode; and
connecting the consumer device to the USB hub through the USB routing switch and the USB hub thereby bypassing the USB bridge when the USB routing switch determines the consumer device is the USB device mode.
3. The method according to claim 1 , further comprising the step of:
automatically recognizing whether the consumer device connected to the USB Port is the second USB Host or the USB Device and control the USB routing switch accordingly.
4. The method according to claim 2 , further comprising the step of:
dynamically switching operation of USB Ports connected to the USB Hub Module between USB Device mode and USB Host mode.
5. The method according to claim 1 , further comprising the step of:
connecting each consumer device of the plurality of consumer devices, via the USB routing switch, to either the USB Bridge or the USB Hub based on whether each consumer device attached to each USB Port in the plurality of USB Ports is the USB Host or the USB Device.
6. The method according to claim 1 , further comprising the step of:
controlling the USB routing switch via the USB bridge.