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High performance automotive diagnostics instrumentation architecture
| Details |
Inventors: Parvahan, Behzad;
Assignee: Hewlett-Packard Company (Palo Alto, CA)
Primary Examiner: Cuchlinski, Jr.; William A.
Assistant Examiner: Arthur; Gertrude
Attorney, Agent or Firm: Lee; Denise A.
The present invention provides an automotive test diagnostic system which is capable of achieving high data rates through multiple, independent instrumentation channels. The test diagnostic system includes a vehicle diagnostic instrumentation controller, the vehicle diagnostic instrumentation controller comprising: an instrument peripheral interface means; an instrumentation control means, the instrumentation control means being further comprised of an arbitration control means, and a device interface means, wherein the arbitration control means is electrically coupled to the device interface means; and a first bus for electrically coupling the instrument peripheral interface means to the instrumentation control means. In the preferred embodiment, the instrumentation control means further includes a data qualification means and a data storage means for storing data. However, dependent on the rate of data transfer, the calculations required, etc., a data storage means may not be required for a particular channel. |
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DETAILED DESCRIPTION The present invention provides an automotive test diagnostic system architecture which is capable of achieving high data rates through multiple, independent instrumentation channels.
The test diagnostic system includes a vehicle diagnostic instrumentation controller, the vehicle diagnostic instrumentation controller comprising: an instrument peripheral interface means; an instrumentation control means, the instrumentation control means being further comprised of an arbitration control means, and a device interface means, wherein the arbitration control means is electrically coupled to the device interface means; and a first bus for electrically coupling the instrument peripheral interface means to the instrumentation control means.
In the preferred embodiment, the instrumentation control means further includes a data qualification means and a data storage means for storing data.
However, dependent on the rate of data transfer, the calculations required, etc.
, a data storage means may not be required for a particular channel.
The instrumentation controller is a register-based, reprogrammable data processing solution.
Because the instrumentation controller is register-based, the instrumentation controller used in the present invention is capable of achieving faster data rates than conventional microcontroller based solutions which are dependent on software execution.
The increased speed of the instrumentation controller allows control of the analog circuitry and data filtering to be performed real time.
Further, because the instrumentation controller is hardware based, the delay for execution of an operation is precisely known.
Thus, the present invention provides a much more deterministic solution than a software based solution, thus making a large range of performance objectives possible.
In general, a microcontroller does each instruction sequentially.
This is in contrast to an instrumentation controller where operations for multiple channels can be performed in parallel
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