Flexible mobile device connectivity to automotive systems with USB hubs
A system which is configured 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 the need to add or provide OTG controllers in the system or additional vehicle wiring, or inhibiting the functionality of any consumer devices operating in USB Device mode connected to a vehicle system Hub while another consumer device connected to the same Hub operates in USB Host mode. Preferably, the system is configured to provide that no additional cabling is required, and no hardware changes are required to be made to the HU. The system 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 bridge, thereby rendering the consumer device compatible with the vehicle's embedded USB Host.
1. A Universal Serial Bus (USB) hub module, comprising:
a first USB port configured to be connected to a USB host;
a second USB port configured to be connected to a consumer device;
a USB hub interconnected to the first USB port and the second USB port;
a USB bridge interconnected to the USB hub; and
a USB routing switch interconnected to the USB bridge, the USB hub, and the second USB port, wherein the USB routing switch is configured to connect the second USB port to the first USB port through the USB bridge, thereby providing bidirectional initiation of communication between the USB host and the consumer device when the consumer device connected to the second USB port is in a USB host mode and wherein the USB routing switch is configured to connect the second USB port directly to the first USB port through the USB hub, thereby only responding to communication initiated by the USB Host when the consumer device connected to the second USB port is in a USB device mode.
2. The USB hub module according to claim 1 , wherein the USB routing switch is configured to connect the second USB port to the first USB port through the USB bridge thereby providing bidirectional initiation of communication between the USB host and the consumer device when the consumer device connected to the second USB port is in the USB host mode and wherein the USB routing switch is configured to simultaneously connect another second USB port directly to the first USB port through the USB hub, thereby only responding to communication initiated by the USB Host when another consumer device connected to the another second USB port is in the USB device mode.
3. The USB hub module according to claim 1 , wherein the USB hub module is configured to recognize whether the consumer device connected to the second USB port is in the USB host mode or in the USB device mode and control the USB routing switch accordingly.
4. The USB hub module according to claim 1 , wherein the USB hub module is configured to dynamically switch operation of the second USB port between supporting the consumer device in the USB device mode or the USB host mode.
5. The USB hub module according to claim 1 , wherein the USB routing switch is configured to connect the consumer device to either the USB bridge or the USB hub based on whether the consumer device attached to the second USB port is configured to act as the USB host or a USB device.
6. The USB hub module according to claim 1 , wherein the USB bridge is configured to control the USB routing switch.
7. An integrated circuit, comprising:
a USB hub configured to be interconnected to a first USB port connected to a USB host and a second USB port connected to a consumer device;
a USB bridge interconnected to the USB hub; and
a USB routing switch interconnected to the USB bridge, the USB hub, and the second USB port, wherein the USB routing switch is configured to connect the second USB port to the first USB port through the USB bridge thereby providing bidirectional initiation of communication between the USB host and the consumer device when the consumer device connected to the second USB port is in a USB host mode and wherein the USB routing switch is configured to connect the second USB port directly to the first USB port through the USB hub, thereby only responding to communication initiated by the USB Host when the consumer device connected to the second USB port is in a USB device mode.
8. The integrated circuit according to claim 7 , wherein the USB routing switch is configured to connect the second USB port to the first USB port through the USB bridge thereby providing bidirectional initiation of communication between the USB host and the consumer device when the consumer device connected to the second USB port is in the USB host mode and wherein the USB routing switch is configured to simultaneously connect another second USB port directly to the first USB port through the USB hub, thereby only responding to communication initiated by the USB Host when another consumer device connected to the another second USB port is in the USB device mode.
9. The integrated circuit according to claim 7 , wherein the integrated circuit is configured to recognize whether the consumer device connected to the second USB port is in the USB host mode or in the USB device mode and control the USB routing switch accordingly.
10. The integrated circuit according to claim 7 , wherein the integrated circuit is configured to dynamically switch operation of the second USB port between supporting the consumer device in the USB device mode or the USB host mode.
11. The integrated circuit according to claim 7 , wherein the USB routing switch is configured to connect the consumer device to either the USB bridge or the USB hub based on whether the consumer device attached to the second USB port is configured to act as the USB host or a USB device.
12. The integrated circuit according to claim 7 , wherein the USB bridge is configured to control the USB routing switch.
13. A method of operating a USB hub module having a USB hub configured to be interconnected to a first USB port connected to a USB host and a second USB port connected to a consumer device, a USB bridge interconnected to the USB hub, and a USB routing switch interconnected to the USB bridge, the USB hub, and the second USB port, said method comprising the steps of:
determining when the consumer device is operating in a USB host mode and in a USB device mode;
connecting the consumer device via the second USB port to the USB hub via the first USB port through the USB routing switch and the USB bridge, thereby providing bidirectional initiation of communication between the USB host and the consumer device when the consumer device is determined to be in the USB host mode; and
connecting the consumer device via the second USB port to the USB hub via the first USB port through the USB routing switch and the USB hub thereby bypassing the USB bridge to only respond to communication initiated by the USB host when the consumer device is determined to be in the USB device mode.
14. The method according to claim 13 , wherein the step of determining if when the consumer device is operating in the USB host mode or in the USB device mode is performed by the USB routing switch.
15. A Universal Serial Bus (USB) connectivity module, comprising:
a first USB port;
a second USB port;
a USB host-to-host bridge connected to said first USB port;
a USB routing switch connected to said first USB port, said second USB port and said USB host-to-host bridge, wherein said USB routing switch is configured to provide a communication link between said first USB port and said second USB port through said USB host-to-host bridge, thereby providing bidirectional initiation of communication between the USB host and the consumer device when a first consumer device connected to said second USB port is operating in a USB host mode and wherein said USB routing switch is configured to provide another communication link between said first USB port and said second USB port that bypasses said USB host-to-host bridge, thereby only responding to communication initiated by the USB host when the first consumer device connected to said second USB port is operating in a USB device mode.
16. The USB connectivity module according to claim 15 , further comprising a third USB port, wherein said USB routing switch is configured to provide a first communication link between said first USB port and said second USB port through said host host-to-host bridge, thereby providing bidirectional initiation of communication between the USB host and the consumer device when the first consumer device connected to said second USB port is operating in the USB host mode and wherein said USB routing switch is configured to provide simultaneously provide a second communication link between said first USB port and said third USB port that bypasses said USB host-to-host bridge, thereby only responding to communication initiated by the USB Host when a second consumer device connected to said third USB port is operating in the USB device mode.
17. The USB connectivity module according to claim 15 , further comprising a third USB port, wherein said USB routing switch is further connected to the third USB port, wherein said USB routing switch is configured to provide a first communication link between said first USB port and said second USB port through said USB host-to-host bridge, thereby providing bidirectional initiation of communication between the USB host and the consumer device when the first consumer device connected to said second USB port is operating in the USB host mode, and wherein said USB routing switch is configured to provide a second communication link between said first USB port and said third USB port that bypasses said USB host-to-host bridge, thereby only responding to communication initiated by the USB host when a second consumer device connected to said third USB port is operating in the USB device mode without interrupting the first communication link between said first USB port and said second USB port.
18. A communication system, comprising:
a USB hub including a first USB port and a second USB port;
a central vehicle microcontroller connected to said first USB port;
a first consumer device connected to said second USB port;
a USB host-to-host bridge connected to said first USB port;
a USB routing switch providing a first communication path between said second USB port and said USB host-to-host bridge and a second communication path between said second USB port and said first USB port that bypasses said USB host-to-host bridge, wherein said USB routing switch connects said first communication path when the first consumer device is connected to said second USB port and is operating in a USB host mode, thereby providing bidirectional initiation of communication between the USB host and the consumer device and wherein said USB routing switch connects said second communication path, thereby only responding to communication initiated by the USB host when the first consumer device is connected to said second USB port and is operating in a USB device mode.
19. The communication system according to claim 18 , further comprising a second consumer device, wherein the USB hub includes a third USB port and wherein the USB routing switch further connects a third communication path between said third USB port and said first USB port that bypasses said USB host-to-host bridge, thereby only responding to communication initiated by the USB Host when the second consumer device is connected to said third USB port and is operating in the USB device mode.
20. The communication system according to claim 19 , wherein said USB routing switch is configured to simultaneously provide the second communication path between said first USB port and said third USB port without interrupting the first communication path between said first USB port and said second USB port.