INSTRUMENT CONTROL SYSTEM AND METHODS

• US 20100332953A1
• Filed: 06/26/2009
• Published: 12/30/2010
• Est. Priority Date: 06/26/2009
• Status: Active Grant

• Current Assignee: Agilent Technologies, Inc.
• Original Assignee: Agilent Technologies, Inc.
• Inventors: Webb, Peter G., Ghosh, Jayati, Curry, Bo
• Granted Patent: US 8,332,737 B2
• Time in Patent Office: Days
• US Class Current: 714/776
• CPC Class Codes: G06F 11/0736 in functional embedded systems, i.e. in a data processing system designed as a combination of hardware and software dedicated to performing a certain function testing or monitoring of automated control systems G05B23/02
• CPC Class Codes: G06F 11/0748 in a remote unit communicating with a single-box computer node experiencing an error/fault remote testing G06F11/2294
• CPC Class Codes: G06F 11/076 by exceeding a count or rate limit, e.g. word- or bit count limit
• CPC Class Codes: G06F 11/3013 where the computing system is an embedded system, i.e. a combination of hardware and software dedicated to perform a certain function in mobile devices, printers, automotive or aircraft systems testing or monitoring of control systems or parts thereof G05B23/02
• CPC Class Codes: G06F 11/3055 Monitoring arrangements for monitoring the status of the computing system or of the computing system component, e.g. monitoring if the computing system is on, off, available, not available error or fault processing without redundancy G06F11/0703; error detection or correction by redundancy in data representation G06F11/08; error detection or correction by redundancy in operation G06F11/14; error detection or correction by redundancy in hardware G06F11/16
• CPC Class Codes: G06F 11/3058 Monitoring arrangements for monitoring environmental properties or parameters of the computing system or of the computing system component, e.g. monitoring of power, currents, temperature, humidity, position, vibrations thermal management in cooling arrangements of a computing system G06F1/206

Abstract

Methods, systems and computer readable media for controlling an instrument in communication with a host computer are provided. Operations of an instrument that must be completed on schedule are controlled via an embedded controller embedded in the instrument. A complete status packet is sent to a host computer from the embedded controller Periodically, the embedded controller repeats the sending of a complete status packet to the host computer, wherein status values in the complete status packet are updated with each iteration of sending a complete status packet.

Claims

1. A method of controlling an instrument in communication with a host computer, said method comprising:

controlling operations of an instrument that must be completed on schedule via an embedded controller embedded in said instrument;

sending a status packet to a host computer; and

periodically repeating said sending a status packet to the host computer, wherein status values in said status packet are updated with each iteration of repeating said sending a status packet.

2. The method of claim 1, wherein said status packet is a complete status packet.

3. The method of claim 1, further comprising:

sending a command to perform an action from said host computer to said embedded controller;

testing, by the embedded controller, as to whether the command is allowed;

sending an error code from the embedded controller to the host computer if the command is not allowed; and

if the command is allowed, commencing execution of the command by the embedded controller.

4. The method of claim 3, wherein the embedded controller includes an acknowledgement of the command in the next periodically repeated sending of a status packet.

5. The method of claim 3, wherein the host computer is responsible for determining completion of the command by monitoring one or more fields in the periodically received status packets.

6. The method of claim 1, wherein the host computer comprises a multi-threaded processor having multiple threads of operation, and wherein a plurality of said threads of operation each execute a command concurrently.

7. The method of claim 6, wherein said host computer monitors execution of each of said commands via said periodically repeating, complete status packets.

8. The method of claim 1, wherein the host computer maintains a shadow of a state of the instrument by unpacking each said status packet received.

9. The method of claim 1, wherein said status packet is repeatedly, periodically generated and sent at a regular frequency.

10. The method of claim 1, wherein a status packet is generated and sent from said embedded controller to said host computer upon the occurrence of a predetermined event.

11. The method of claim 10, wherein the instrument comprises a scanner and said predetermined event comprises the scanner reaching the end of a scan line.

12. The method of claim 10, wherein the status packet that is generated and sent upon the occurrence of a predetermined event is a complete status packet.

13. A method of controlling an instrument in communication with a host computer, said method comprising:

sending a command atom from a host computer to an embedded controller embedded in said instrument;

processing the command by the embedded controller;

generating and sending a status packet, including a status of the command, by said embedded controller to said host computer; and

periodically repeating said generating and sending a status packet by the embedded controller to the host computer, wherein status values in said status packet are updated with each iteration of repeating said generating.

14. The method of claim 13, wherein said status packet is a complete status packet.

15. The method of claim 13, wherein said processing the command comprises controlling the instrument to at least partially perform a physical act.

16. The method of claim 13, wherein said host computer prevents additional commands from being sent until acknowledgement of the command has been sent is received in one of said status packets.

17. The method of claim 13, wherein completion of a task instructed by said command is detected by said host computer by monitoring status values in said status packets.

18. The method of claim 13, wherein a physical system of said instrument required for a task by said command is locked out by said host computer during performance of the task, thereby preventing a conflicting command that requires use of that system from being sent from the host computer to the embedded controller.

19. The method of claim 13, wherein the host computer comprises a multi-threaded processor having multiple threads of operation, and wherein a plurality of said threads of operation each execute a command concurrently.

20. The method of claim 19, wherein said host computer monitors execution of each of said commands via said periodically repeating, status packets.

21. An instrumentation system comprising:

an instrument including an embedded controller configured to control execution of operations by said instrument;

a host computer configured to communicate with said embedded controller; and

programming configured to control operation of the system, which when executed by said system performs;

generating and sending a status packet including status parameters of the instrument, by said embedded controller to said host computer; and

periodically repeating said generating and sending a status packet by said embedded controller to said host computer, wherein said status parameters in said status packet are updated with each iteration of repeating said generating.

22. The instrument of claim 21, wherein said status packet is a complete status packet.

23. The system of claim 21, wherein execution of said programming further causes said system to perform:

sending a command atom by said host computer to said embedded controller;

processing the command by said embedded controller; and

generating and sending one of said status packets, including a status of the command, by said embedded controller to said host computer.

24. The method of claim 21, wherein said processing the command comprises controlling the instrument to at least partially perform a physical act.

25. A computer readable medium that provides instructions, which when executed on at least one processor, causes the at least one processor to perform a method comprising:

generating and sending a status packet including status parameters of an instrument, by an embedded controller embedded in the instrument, to a host computer; and

periodically repeating said generating and sending a status packet by said embedded controller to said host computer, wherein said status parameters in said status packet are updated with each iteration of repeating said generating.

26. The computer readable medium of claim 25, wherein said instructions, when executed on said at least one processor, cause said at least one processor to perform:

sending a command atom by said host computer to said embedded controller;

processing the command by said embedded controller; and

generating and sending one of said status packets, including a status of the command, by said embedded controller to said host computer.

27. The computer readable medium of claim 25, wherein said status packet is a complete status packet.