Data acquisition system

• US 6,105,016 A
• Filed: 04/21/1998
• Issued: 08/15/2000
• Est. Priority Date: 03/06/1998
• Status: Expired due to Fees

• Current Assignee: Computer I/O
• Original Assignee: Jodfrey Associates, Inc.
• Inventors: Martin, Thomas J.
• Primary Examiner(s): Lintz, Paul R.
• Assistant Examiner(s): Coby, Frantz
• Application Number:
  US09/063,669
• Time in Patent Office: 847 Days
• Field of Search: 707/1, 707/10, 707/101
• US Class Current: 1/1
• CPC Class Codes: G06F 3/0626 Reducing size or complexity of storage systems
• CPC Class Codes: G06F 3/0664 at device level, e.g. emulation of a storage device or system
• CPC Class Codes: G06F 3/0674 Disk device
• CPC Class Codes: Y10S 707/99931 Database or file accessing
• CPC Class Codes: Y10S 707/99942 Manipulating data structure, e.g. compression, compaction, compilation

Abstract

A data acquisition system for use with a computer includes an interface unit for interfacing with a computer; a control data memory for storing control data which is associated with controls for the computer; and a file data memory for storing file data which is to be acquired by the computer. A processing system is provided for controlling operation of the control data memory and file data memory, and for controlling transfer of data to the computer from the file data memory via the interface unit via a controllable data bus and an address/control bus.

Claims

1. A data acquisition and data processing system that emulates a disk drive, from a hardware perspective of an attached computer, having a data bus and address/control bus, the system comprising:

a microprocessor coupled to the data bus and the address/control bus for overall control of the system;

data acquisition and processing circuitry coupled to the data bus and address/control bus;

a non-volatile memory coupled to the data bus and address/control bus, and being adapted to store data records which include disk drive control and file system information;

a random access memory coupled to the data bus and address/control bus, and being adapted to store data acquired by the data acquisition and processing circuitry in a specially formatted manner; and

disk interface circuitry coupled to the data bus and address/control bus, and being adapted to interface with the attached computer such that the system appears to the attached computer as a disk drive.

2. The data acquisition and data processing system according to claim 1, wherein said disk interface circuitry controls transfer of data to and from the attached computer such that data being transferred to the attached computer appears to the attached computer to be file data from a disk drive wherein the system appears as a disk drive from a software perspective of the attached computer.

3. The data acquisition and data processing system according to claim 1, wherein proprietary hardware is not required to couple the system to the attached computer.

4. The data acquisition and data processing system as defined by claim 1 further comprising a standard I/O file interface for use by the attached computer to control the data acquisition and processing circuitry, wherein:

the attached computer configures operating parameters of the data acquisition/processing circuitry;

the attached computer reads an operational status of the data acquisition/data processing circuitry;

the attached computer upgrades or updates internal firmware or software in the data acquisition and data processing system using the standard I/O file interface;

the attached computer stores serial numbers and revision levels of the data acquisition/processing circuitry for configuration management purposes; and

informational files are used to convey general information from the system to the attached computer.

5. The data acquisition and data processing system as defined by claim 1 further comprising a standard I/O file interface for use by the attached computer to transfer data with the system wherein the attached computer uses one or more files of data acquisition/data processing data to access and read or write data to/from said data acquisition and processing circuitry.

6. The data acquisition and data processing system as defined by claim 1 wherein the non-volatile memory for storing data records is one of a PROM, EPROM and Flash EPROM.

7. The data acquisition and data processing system as defined in claim 1 wherein the random access memory for storing data acquired by the system is one of a dynamic RAM and a static RAM.

8. The data acquisition and data processing system defined in claim 1 further comprising a narrow SCSI interface capable of accepting and executing SCSI-2 commands and capable of accepting and executing Ultra SCSI commands and data transfers like a disk drive.

9. The data acquisition and data processing system according to claim 1 wherein the disk interface circuitry is Ethernet.

10. The data acquisition and data processing system according to claim 1 wherein the disk interface circuitry is a Fiber Channel.

11. The data acquisition and data processing system according to claim 1 wherein the disk interface circuitry is IDE (integrated drive electronics) or EIDE (enhanced IDE).

12. A data mapping method for providing a set of data records suitable for transfer across a hardware interface so as to emulate the transfer of disk drive control information to an attached computer, said data mapping method comprising the steps of:

a) partitioning disk interface circuitry which emulates partitioning a disk drive;

b) formatting the disk interface circuitry, which emulates formatting a disk drive; and

c) constructing a file system which emulates installing a file system on a disk drive.

13. A data mapping method for transferring a set of data records acquired by a data acquisition and data processing system across a hardware interface to an attached computer in the same manner as the file contents of a disk drive, the method comprising the steps of:

storing data acquired from the data acquisition and data processing system in locations with proper block, byte and word boundaries required for normal disk drive file data;

passing data using correct "endian order" or byte alignment (within a data word) corresponding to that required by the attached computer; and

aligning blocks of data corresponding to certain channels of data acquisition to data blocks in the same manner as a file would be aligned on a disk drive.

14. A method for transferring indexed data across a hardware interface comprising the steps of:

receiving a request from an attached computer via disk interface circuitry;

determining whether the request is for indexed data which is out of range of stored data records;

returning an error signal via the disk interface circuitry for a request which is determined to be out of range;

indexing the stored data records and retrieving the control information based on the request; and

forwarding the data corresponding to the request to the disk interface circuitry for transfer to the attached computer.