Multi-point electronic control system protocol
First Claim
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1. An electronic control system having a plurality of devices and connected to a communication interface, comprising:
- a source device identifier indicating a source device sending a command record;
a destination device identifier indicating a destination device receiving the command record;
a command description containing a command code corresponding to a message from the source device to the destination device; and
a message type identifier indicating that the command record is a control request, the control request including a bus master request that asks the destination device to assume control over the communication interface,wherein all of said plurality of devices connected to the communication interface use the communication protocol to communicate with each other via the communication interface,wherein the destination device acting as the bus master sends the bus master request to another one of said plurality of devices after a predetermined time period.
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Abstract
A generic software protocol allows communication between multiple devices within an electronic control system as well as between an electronic control system and an external monitoring device. The generic software protocol is reflected in embedded software in each device in the electronic control system. By using the same protocol in all of the electronic control system devices, the protocol reduces computer processing overhead while providing a predictable, yet flexible framework for device communication.
20 Citations
14 Claims
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1. An electronic control system having a plurality of devices and connected to a communication interface, comprising:
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a source device identifier indicating a source device sending a command record; a destination device identifier indicating a destination device receiving the command record; a command description containing a command code corresponding to a message from the source device to the destination device; and a message type identifier indicating that the command record is a control request, the control request including a bus master request that asks the destination device to assume control over the communication interface, wherein all of said plurality of devices connected to the communication interface use the communication protocol to communicate with each other via the communication interface, wherein the destination device acting as the bus master sends the bus master request to another one of said plurality of devices after a predetermined time period. - View Dependent Claims (2, 3, 7, 8)
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4. An electronic control system, comprising:
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an electronic control unit; a memory module; and a user interface, wherein the electronic control unit, the memory module, and the user interface are connected to a communication interface and communicate with each other via the communication interface using embedded software that implements a communication protocol, the communication protocol comprising a source device identifier indicating a source device sending a command record; a destination device identifier indicating a destination device receiving the command record; and a command description containing a command code corresponding to a message from the source device to the destination device, wherein devices other than the electronic control unit may obtain bus master status by accepting a bus master request from another device. - View Dependent Claims (5, 6, 9, 10, 11, 12, 13, 14)
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Specification