System and method to address devices connected to a bus system

• US 9,160,559 B2
• Filed: 05/16/2012
• Issued: 10/13/2015
• Est. Priority Date: 05/16/2012
• Status: Active Grant

• Current Assignee: Infineon Technologies AG
• Original Assignee: Infineon Technologies AG
• Inventors: Barrenscheen, Jens, Pottbaecker, Ansgar, Cortigiani, Fabrizio
• Primary Examiner(s): Unelus, Ernest
• Application Number:
  US13/473,236
• Publication Number:
  US 20130311691A1
• Time in Patent Office: 1,245 Days
• Field of Search: 701/29, 710/110, 710/3
• US Class Current: 1/1
• CPC Class Codes: G06F 13/364 using independent requests or grants, e.g. using separated request and grant lines
• CPC Class Codes: G06F 13/404 with address mapping
• CPC Class Codes: H04L 12/403 with centralised control, e.g. polling
• CPC Class Codes: H04L 2012/40234 Local Interconnect Network LIN
• CPC Class Codes: H04L 25/028 Arrangements specific to the transmitter end
• CPC Class Codes: H04L 43/50 Testing arrangements
• CPC Class Codes: H04L 61/5038 for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
• CPC Class Codes: Y04S 40/00 Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them

Abstract

A system includes a bus system, such as a LIN bus system. A number of components are connected to the bus system. A first component of the components is configured to detect a direction of a current to detect a location of the first component in the bus system. Each of the components can have a unique address.

Claims

1. A method to address components connected to a local interconnect network (LIN) bus system, the method comprising:

determining that a test signal is being applied to the LIN bus system; and

determining a location of a first slave component in the LIN bus system by detecting a direction of a current of the test signal through the first slave component, wherein the test signal is applied to the bus system by a second slave component, and wherein determining the location of the first slave component in the bus system comprises;

determining that the first slave component is positioned in-between a master component and the second slave component on the bus system when the current of the test signal flows in a first direction through the first slave component, wherein the current of the test signal flows from a first connection on the LIN bus of the first slave component to a second connection on the LIN bus of the first slave component when flowing in the first direction through the first slave component, and wherein a resistor and an amplifier are directly connected to the first connection; and

determining that the second slave component is positioned in-between the master component and the first slave component on the bus system when the current of the test signal flows in a second direction through the first slave component, wherein the current of the test signal flows from the second connection of the first slave component to the first connection of the first slave component when flowing in the second direction through the first slave component.

2. The method of claim 1, wherein the LIN bus system comprises one single transmission line.

3. The method of claim 1, wherein the LIN bus system comprises a plurality of transmission lines.

4. The method of claim 1, wherein the test signal is applied to the LIN bus system by the master component.

5. The method of claim 1, wherein the first and second slave components are configured to be controlled by the master component.

6. The method of claim 5, wherein the test signal is applied to the LIN bus system by the second slave component in response to a command from the master component.

7. The method of claim 6, wherein the test signal comprises a dominant logical 0 or dominant logical 1.

8. The method of claim 6, further comprising assigning a unique slave identification number or address to the first and second components by the master component.

9. The method of claim 8, wherein assigning the unique slave identification number or address comprises sending a device identification number of the first and second components to the master component.

10. The method of claim 1, wherein detecting the direction of the current of the test signal through the first component comprises detecting the direction of the current through a shunt resistor in the first component.

11. A system comprising:

a local interconnect network (LIN) bus system configured to transport a test signal; and

a plurality of slave components connected to the LIN bus system, wherein a first slave component in the plurality of slave components is configured to detect a direction of a current of the test signal through the first slave component to determine a location of the first slave component on the LIN bus system, wherein a second component in the plurality of slave components is configured to apply the test signal to the LIN bus system, and

wherein the first slave component is configured to detect the direction of the current of the test signal through the first slave component to determine the location of the first slave component by;

determining that the first slave component is positioned in-between a master component and a second slave component on the LIN bus system when the current of the test signal flows in a first direction through the first slave component, wherein the current of the test signal flows from a first connection on the LIN bus of the first slave component to a second connection on the LIN bus of the first slave component when flowing in the first direction through the first slave component, and wherein a resistor and an amplifier are directly connected to the first connection; and

determining that the second slave component is positioned in-between the master component and the first slave component on the LIN bus system when the current of the test signal flows in a second direction through the first slave component, wherein the current of the test signal flows from the second connection of the first slave component to the first connection of the first slave component when flowing in the second direction through the first slave component.

12. The system of claim 11, wherein the LIN bus system comprises a single transmission line.

13. The system of claim 11, wherein the LIN bus system comprises a plurality of transmission lines.

14. The system of claim 11, wherein the first slave component comprises a first connection, a second connection, and a shunt resistor coupling the first connection to the second connection, and wherein the first slave component is configured to determine the location of the first slave component on the LIN bus system by:

determining that the first connection is coupled to the second slave component when the current of the test signal flows from the first connection towards the shunt resistor; and

determining that the second connection is coupled to the second slave component when the current of the test signal flows from the second connection to the shunt resistor.

15. A vehicle comprising:

a local interconnect network (LIN) bus system;

a plurality of components connected to the LIN bus system including at least a first component and a second component, wherein the first component is configured to detect a direction of a current of a test signal through the first component to determine a location of the first component relative to the second component on the LIN bus system; and

a plurality of vehicle devices, each vehicle device electrically coupled to a respective one of the plurality of components, wherein the second component is configured to apply the test signal to the LIN bus system, and

wherein the first component is configured to detect the direction of the current through the first component to determine the location of the first component relative to the second component on the LIN bus system by;

determining that the first component is positioned in-between a master component and the second component on the LIN bus system when the current of the test signal flows in a first direction through the first component, wherein the current of the test signal flows from a first connection on the LIN bus of the first slave component to a second connection on the LIN bus of the first slave component when flowing in the first direction through the first slave component, and wherein a resistor and an amplifier are directly connected to the first connection; and

determining that the second component is positioned in-between the master component and the first component on the LIN bus system when the current of the test signal flows in a second direction through the first component, wherein the current of the test signal flows from the second connection of the first component to the first connection of the first component when flowing in the second direction through the first component.

16. The vehicle of claim 15, wherein the vehicle is a car or a truck or a motorcycle.

17. The vehicle of claim 15, wherein each vehicle device comprises a device selected from the group consisting of a motor for an electrical window-winder, a motor for a side view mirror, a device configured to adjust a headlight, a device configured to adjust a seat position, and a door sensor.

22. The vehicle of claim 15, wherein the first component is configured to determine the location of the first component relative to the second component on the LIN bus system by detecting the direction of the current through a shunt resistor in the first component.

18. A method comprising:

assigning a unique address to each of a plurality of components connected to a local interconnect network (LIN) bus system, and

determining a position of a first component in the plurality of components on the LIN bus system by detecting a direction of a test signal current through the first component, wherein the test signal current is applied to the LIN bus system by a second component, and wherein determining the position of the first component in the LIN bus system comprises;

determining that the first component is positioned in-between a master component and the second component on the LIN bus system when the test signal current flows in a first direction through the first component, wherein the current of the test signal flows from a first connection on the LIN bus of the first slave component to a second connection on the LIN bus of the first slave component when flowing in the first direction through the first slave component, and wherein a resistor and an amplifier are directly connected to the first connection; and

determining that the second component is positioned in-between the master component and the first component on the LIN bus system when the test signal current flows in a second direction through the first component, wherein the test signal current flows from the second connection of the first component to the first connection of the first component when flowing in the second direction through the first component.

21. The method of claim 18, wherein determining the position of the first component in the LIN bus system comprises detecting the direction of the test signal current through a shunt resistor in the first component.

19. A system comprising:

a local interconnect network (LIN) bus system; and

a means for determining a location of a first component in the LIN bus system by detecting a direction of a current of a test signal through the first component, wherein the test signal is applied to the LIN bus system by a second component, and wherein the means for determining the location of the first component in the LIN bus system comprises;

a means for determining that the first component is positioned in-between a master component and the second component on the LIN bus system when the current of the test signal flows in a first direction through the first component, wherein the current of the test signal flows from a first connection on the LIN bus of the first slave component to a second connection on the LIN bus of the first slave component when flowing in the first direction through the first slave component, and wherein a resistor and an amplifier are directly connected to the first connection; and

a means for determining that the second component is positioned in-between the master component and the first component on the LIN bus system when the current of the test signal flows in a second direction through the first component, wherein the test signal current flows from the second connection of the first component to the first connection of the first component when flowing in the second direction through the first component.

20. The system of claim 19, wherein the means for determining the location of the first component in the LIN bus system further comprises:

a means for detecting the direction of the current through a shunt resistor in the first component.