Apparatus, system and method for sharing data from a device between multiple computers

• US 7,689,724 B1
• Filed: 08/16/2002
• Issued: 03/30/2010
• Est. Priority Date: 08/16/2002
• Status: Expired due to Fees

• Current Assignee: Cypress Semiconductor Corporation (Infineon Technologies AG)
• Original Assignee: Cypress Semiconductor Corporation (Infineon Technologies AG)
• Inventors: Hatton, Barry Sullivan, Wright, David Gordon
• Primary Examiner(s): Winder, Patrice
• Assistant Examiner(s): CHOUDHURY, AZIZUL Q
• Application Number:
  US10/222,155
• Time in Patent Office: 2,783 Days
• Field of Search: None
• US Class Current: 709/253
• CPC Class Codes: G06F 13/105 where the programme performs an input/output emulation function

Abstract

An apparatus, system and method of sharing device data from a peripheral device by at least a first and a second computer where the peripheral device coupled with the first computer. The apparatus includes a device emulator coupled between the first computer and the second computer, the device emulator adapted to pass the device data from the first computer to the second computer in a format used by the peripheral device. Device data is received at the first computer, and it is determined whether the device data should be processed by the first computer, and the device data is passed to the device emulator for transmission to the second computer. In a method implementation, the determining operation may examine whether the first computer is the intended target of device data. The device data may be received at the device emulator and the device data may be encoded in a format used by the peripheral device, and transmitted in the format to the second computer. In this manner, the data from the device is shared by the first and second computers, as if the second computer has been connected to the device.

Claims

1. A method of sharing device data and focus command data from a peripheral device by a plurality of computers including a first, second, and third computer, said peripheral device coupled with the first computer, the method comprising:

providing for coupling the peripheral device to the first computer using a first hardware interface;

providing a first device emulator coupled between and separate from the first computer and the second computer, the first device emulator adapted to pass the device data and focus command data from the first computer to the second computer in a format used by the peripheral device, the first device emulator further comprising,

a first USB peripheral controller configured to receive data from the first computer, the first USB peripheral controller configured to be coupled with the first computer, using a first hardware interface of the first computer, the data being originated by the peripheral device and received by the first USB peripheral controller from the first computer, and

a second USB peripheral controller coupled with the first USB peripheral controller to receive data therefrom, the second USB peripheral controller configured to be coupled with the second computer using a second hardware interface of the second computer, the second USB peripheral controller configured to encode the data received from the first computer in a format used by the peripheral device and adapted to pass the encoded data which emulates the data that originated from the peripheral device to the second computer through the second hardware interface in the format used by the peripheral device;

providing a second device emulator coupled between and separate from the second computer and the third computer, the second device emulator adapted to pass the device data and focus command data from the second computer to the third computer in a format used by the peripheral device,

receiving the device data and focus command data at the first computer;

processing device data and focus command data received from the peripheral device;

determining whether the device data should be processed by the first computer using the focus command data; and

passing the device data to the first device emulator for transmission to the second computer if the focus command data identifies a computer different than the first computer.

2. The method of claim 1, further comprising:

receiving the device data at the first device emulator;

encoding the device data in a format used by the peripheral device;

transmitting the device data in the encoded format to the second computer;

receiving the device data at the second computer;

determining whether the device data should be processed by the second computer; and

passing the device data to the second device emulator for transmission to the third computer.

3. The method of claim 1, further comprising:

generating a control data signal indicating whether the device data is intended for the first computer, the second computer, or the third computer;

transmitting the control data signal to the first, second, and third computers.

4. The method of claim 3, further comprising:

providing a first software interface in the first computer for processing the device data, the first software interface examining the control data signal in order to determine whether the device data should be processed by the first computer;

providing a second software interface in the second computer for processing the device data, the second software interface examining the control data signal in order to determine whether the device data should be processed by the second computer; and

providing a third software interface in the third computer for processing the device data, the third software interface examining the control data signal in order to determine whether the device data should be processed by the third computer.

5. A system for sharing device data and focus command data from a peripheral device, the system comprising:

a first computer coupled with the peripheral device;

a second computer; and

a first device emulator coupled between and separate from both the first computer and the second computer, the first device emulator adapted to pass the device data and focus command data which originated from the peripheral device from the first computer to the second computer in a format used by the peripheral device, the first device emulator further comprising,

a first USB peripheral controller configured to receive data from the first computer, the first USB peripheral controller configured to be coupled with the first computer using a first hardware interface of the first computer, the data being originated by the peripheral device and received by the first USB peripheral controller from the first computer, and

a second USB peripheral controller coupled with the first USB peripheral controller to receive data therefrom, the second USB peripheral controller configured to be coupled with the second computer using a second hardware interface of the second computer, the second USB peripheral controller configured to encode the data received from the first computer in a format used by the peripheral device and adapted to pass the encoded data which emulates the data that originated from the peripheral device to the second computer through the second hardware interface in the format used by the peripheral device;

a third computer having a third software interface for processing the device data and focus command data, the third software interface configured for determining whether the device data should be processed by the second computer using the focus command data; and

a second device emulator coupled between the second computer and the third computer, the second device emulator adapted to pass the data which originated from the peripheral device from the second computer to the third computer in a format used by the peripheral device, the second device emulator further comprising,

a first USB peripheral controller configured to receive data from the second computer, the first USB peripheral controller configured to be coupled with the second computer using a first hardware interface, the data being originated by the peripheral device and received by the first USB peripheral controller from the second computer, and

a second USB peripheral controller coupled with the first USB peripheral controller to receive data therefrom, the second USB peripheral controller configured to be coupled with the third computer using a second hardware interface, the second USB peripheral controller configured to encode the data received from the second computer in a format used by the peripheral device and adapted to pass the encoded data which emulates the data that originated from the peripheral device to the third computer through the second hardware interface in the format used by the peripheral device.

6. The system of claim 5, wherein the first, second, and third computers are connected in a daisy chain arrangement with the first and second device emulators.