EP1047997A1 - Procede et son dispositif pour connecter sur le meme port serie deja utilise, un autre appareil peripherique - Google Patents
Procede et son dispositif pour connecter sur le meme port serie deja utilise, un autre appareil peripheriqueInfo
- Publication number
- EP1047997A1 EP1047997A1 EP98964548A EP98964548A EP1047997A1 EP 1047997 A1 EP1047997 A1 EP 1047997A1 EP 98964548 A EP98964548 A EP 98964548A EP 98964548 A EP98964548 A EP 98964548A EP 1047997 A1 EP1047997 A1 EP 1047997A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- computer
- driver
- card reader
- uart
- application
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
- G06F13/4286—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus using a handshaking protocol, e.g. RS232C link
Definitions
- the subject of the invention is a method and its device for connecting to the same serial port of a computer already used by a peripheral, another peripheral.
- the goal is to connect a device such as a smart card reader or any other device between a computer and a serial port already used and connected by any other device (for example a mouse, a joystick, a modem, .. .).
- This serial port uses a RS232 or I2C or SPI or other type of communication protocol, ...
- mouse driver and a "UART" residing in the computer (universal asynchronous transmitter / receiver) are used, which acts as a means of communication management.
- the state of the art can be defined by the following patent: - FR-A-2,740,885: a method for managing and executing security applications within interactive electronic equipment fitted with a peripheral device comprising the secure means and pointing means, comprises an extended communication protocol of the communication protocol specific to the pointing means of said peripheral device.
- This protocol allows the use of a single serial port for communication between application software and the pointing means and the secure means assembled in the peripheral device according to the invention.
- the peripheral device integrates the pointing and terminal functions for microcircuit cards. Specifically to this invention, it includes secure storage, management and execution means for security applications.
- the method and apparatus according to the invention are intended for software protection applications and software license management applications, in particular on interactive electronic equipment.
- the method according to the invention for connecting to the same serial port of a computer already used by a peripheral (A), another peripheral (B), consists in:
- the UART of the card reader checks that the data request has been received and informs the computer, then the computer applies an interrogation scenario, during this scenario the computer is master and the application (B) is the slave.
- the interrogation scenario is used in order not to disturb the user of the mouse during the response time of the card reader.
- an additional contact supplies the “request to send” (RTS) and “ready to receive” (DSR) signals from a computer with a serial port, said contact directly links the mouse to the computer if the power supply to the smart card reader (or other device) is interrupted.
- the invention also relates to the device for implementing the method.
- the device for connecting to the same serial port of a computer already used by a peripheral (A), another peripheral (B), is characterized in that it comprises:
- the device (A) already used on the serial port of the computer is a mouse and the other device (B) is at least a smart card reader.
- Figure 1 is a view showing the current architecture.
- Figure 2 is a schematic and simplified view of the device according to the invention.
- Figure 3 is a view according to Figure 2, according to another mode of presentation.
- Figure 4 is a view of the scenario according to the method. During this scenario, the user can work normally with the mouse without problem.
- the transmission channel is connected directly to the universal asynchronous transmitter / receiver (UART) of the smart card reader 7 and to the mouse 9, this channel is used only by the mouse driver to detect the mouse hardware at system startup. It is also available at any time for the smart card application.
- UART universal asynchronous transmitter / receiver
- the card reader UART When it receives data, the card reader UART shuts down the mouse and immediately sends a response to the computer. Thus, the mouse user is not bothered by this discreet transmission of data.
- the UART of the card reader 7 checks that the data request has been received and informs the computer 6, then the computer 6 applies a interrogation scenario until the smart card reader 8 receives a data request.
- This interrogation scenario is described further in the description and is represented in FIG. 4.
- the computer 6 is the master and the UART of the card reader 7 is the slave.
- FIG. 3 shows the architecture used:
- the interrogation scenario is as follows
- the response time of the smart card reader 8 can be several minutes and the mouse 9 cannot remain out of service throughout this period. It is therefore necessary to use a scenario in order not to disturb the user of the mouse 9 during the response time of the card reader 8.
- the scenario is divided into three phases: - In the first phase, sending a main data request to the smart card reader 8, then the card reader 8 sends information to confirm that the request has been received.
- mouse 9 operates in the absence of power from the smart card reader 8.
- Another embodiment includes another contact powered by "request to send” (RTS) and “ready to receive” (DSR) signals from a serial port computer. This contact connects the mouse directly to the computer in the event of a power failure.
- RTS request to send
- DSR ready to receive
- the serial mouse uses a fixed-format data packet at a speed of 1200 baud to the host when a button is pressed or when mouse movement is detected.
- the mouse transmits an "M" character as soon as the power is turned on or when a reset is initiated by the host. This character informs the host of the conformity of the message with the serial manufacturer format.
- the mouse When transmitting data to the host, the mouse broadcasts the following data format, which conforms to the manufacturer's serial interface.
- the 1200 baud data format uses a 9-bit data block consisting of 7 bits of message data and 2 control bits.
- the mouse controller transmits the next 3-byte data packet, conforming to the interface, in response to a mouse event.
- This UART (universal asynchronous transmitter / receiver) is used to manage the serial port interface.
- the UART 16550 is compatible, in software and pinout, with the 8250 but has an internal queue operating on the principle of "first in, first out” (FIFO) and can be activated and deactivated by the software.
- FIFO first in, first out
- Trigger level 1 byte for interrupt
- Trigger level 4 bytes for interrupt
- DLAB Oxxx xxxx Relative address 0 refers to DATA, relative address 1 to 1ER command Ixxx xxxx Relative address 0 and 1 refers to the divider toggle BR address SETBRK xOxx xxxx Normal UART operation command xlxx xxxx Sends interrupt interrupt signal
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Information Transfer Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9800275 | 1998-01-14 | ||
FR9800275A FR2773626A1 (fr) | 1998-01-14 | 1998-01-14 | Procede et son dispositif pour connecter sur le meme port serie deja utilise, un autre peripherique |
PCT/FR1998/002912 WO1999036857A1 (fr) | 1998-01-14 | 1998-12-30 | Procede et son dispositif pour connecter sur le meme port serie deja utilise, un autre appareil peripherique |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1047997A1 true EP1047997A1 (fr) | 2000-11-02 |
Family
ID=9521725
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98964548A Withdrawn EP1047997A1 (fr) | 1998-01-14 | 1998-12-30 | Procede et son dispositif pour connecter sur le meme port serie deja utilise, un autre appareil peripherique |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1047997A1 (fr) |
JP (1) | JP2002509314A (fr) |
FR (1) | FR2773626A1 (fr) |
WO (1) | WO1999036857A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7124222B2 (en) * | 2003-12-16 | 2006-10-17 | 1X1 Mobile, Ltd. | Control system and method for a communications interface |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2618926B1 (fr) * | 1987-10-30 | 1990-06-08 | Microphar | Dispositif a memoire de controle de l'utilisation d'un logiciel, du type cle |
US5367150A (en) * | 1988-09-26 | 1994-11-22 | Hitachi Maxell, Ltd. | Data processing system using IC card |
FR2668839A1 (fr) * | 1990-11-06 | 1992-05-07 | Bull Cp8 | Dispositif de securite, comportant une memoire et/ou un microcalculateur pour machines de traitement de l'information. |
DE4326735A1 (de) * | 1993-08-09 | 1995-02-16 | Siemens Nixdorf Inf Syst | Rechneranordnung mit wenigstens einer Chipkartenleseeinrichtung |
-
1998
- 1998-01-14 FR FR9800275A patent/FR2773626A1/fr active Pending
- 1998-12-30 WO PCT/FR1998/002912 patent/WO1999036857A1/fr not_active Application Discontinuation
- 1998-12-30 EP EP98964548A patent/EP1047997A1/fr not_active Withdrawn
- 1998-12-30 JP JP2000540500A patent/JP2002509314A/ja active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO9936857A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2773626A1 (fr) | 1999-07-16 |
JP2002509314A (ja) | 2002-03-26 |
WO1999036857A1 (fr) | 1999-07-22 |
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18W | Application withdrawn |
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