JP2002509314A - Method and device for connecting another peripheral device to an already used serial port - Google Patents

Abstract

(57) Summary The present invention relates to a method of connecting another peripheral device (B) to a serial port of a computer (6) already used by the peripheral device (A), and an apparatus related thereto. At the computer level, another software interface, a new driver (4) is provided, which is a driver (3) for the peripheral (A) (already connected to the serial port) acting as a slave. ) And connected to a physical interface (UART1) which operates as a communication management means, and operates as a main driver. The new interface of the other peripheral device (B) is provided with a controlled switch (10) and an interface (UART) (7) operating as a communication means. The two elements are connected to each other, and they are also connected to the physical interface (5) of the computer (6) already used by the peripheral device (A). The present invention is applicable to computers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a method and apparatus for connecting another peripheral device to the same serial port of a computer that is already being used by one peripheral device.

An object of the present invention is to connect a smart card reader or other peripheral device between a computer and a serial port to which another peripheral device (eg, mouse, joystick, modem, etc.) is already connected and used. That is. The serial port uses a communication protocol such as RS232, I2C, or SPI.

[0003]

[Prior art]

In the prior art, taking a mouse as an example, the mouse is connected in series and directly. In order to exchange data between the mouse and the computer, a "mouse driver" and a "UAR" which operates as a communication management means in the computer.
T "(universal asynchronous transmission receiver).

In the prior art, when a user wants to use a mouse on a computer, the user must set an input / output port used by the mouse. For this reason,
The user can use only the mouse on the set port, and cannot use other peripheral devices on the same serial port. The present invention overcomes this problem.

The prior art is shown in the following patents: FR-A-2,740,885: A method for managing and executing a security application in an interactive electronic device with a peripheral device comprising secure means and indicating means is specific to the indicating means of the peripheral device. It consists of an extended communication protocol of the communication protocol. This protocol allows application software and
Communication between the instruction means and the security means relating to the peripheral device of the present invention can be performed through one serial port. Peripherals integrate pointing and terminal functions into microcircuit cards. In particular, in the present invention, the peripheral device comprises a secure means for storing, managing and executing the security application. The method and the device according to the invention are particularly adapted for applications in the protection of software and in the management of user licenses of software in interactive electronic devices.

[0006]

[Means for Solving the Problems]

The method according to the present invention is a method of connecting another peripheral device (B) to the same port as a serial port of a computer already used by the peripheral device (A), wherein the driver of the application (A) is invalidated. A new driver for transmitting data without causing problems for the cursor controlled by the application (A) and for controlling the driver of the application (A) and the serial port of the computer; In order to connect the path directly to the application (A) and the universal asynchronous transmission receiver (UART) of the application (B) and to detect the device at the time of startup, only the driver of the application (A) uses the transmission path, Otherwise, make the transmission path available to the application (B) at any time. The reader's UART disconnects the application (A) as soon as it receives the data and immediately sends a response to the computer. If the computer itself is not requested for data, the card reader's UART acknowledges that the data request has been received. After confirming and notifying the computer, the computer operates an inquiry scenario. In the inquiry scenario, the computer operates as a master and the application (B) operates as a slave.

An inquiry scenario is used so that the user is not bothered by the response time of the card reader. To this end, the query scenario sends three parts, a key data request, to the card reader, and in some cases, the card reader:
The part that sends information confirming successful receipt of the key data request or sends the requested data directly; and whether the smart card reader received data from the card using the query, It has a portion for recognizing whether or not the main data request is ready to be transmitted, and a portion for retrieving data in response to the main data request.

According to another embodiment method, if a smart card (or another peripheral device) is powered down, a “transmission request” from a computer having a serial port
The mouse is connected directly to the computer by an additional connection with (RTS) and "Ready to Receive" (DSR) signals.

The present invention also provides an apparatus for performing the above method. This device is a device for connecting another peripheral device (B) to the same serial port of the computer as the port already used by the peripheral device (A). It is connected to the peripheral device driver (a) operating as used) "slave driver", serves as a physical interface (UART ₁₎ connected to a main driver which operates as a communication managing means, with the new "driver" there comprises a "different software interface", in a new interface other peripheral devices (B), provided with a controlled switch, and an interface that operates as a communication unit (UART _2), these two elements are connected to each other And the physical interface of the computer already used by the peripheral device (A). It is also connected to the interface (UART _1).

According to one embodiment, the peripheral device (A) used at the serial port of the computer is a mouse and the other peripheral device (B) is at least one smart card reader.

[00011] The accompanying drawings are illustrative only and do not limit the invention. The drawings illustrate embodiments of the invention and will facilitate understanding of the invention. FIG. 1 is a diagram showing an actual configuration. FIG. 2 is a simplified schematic diagram of the device according to the invention. FIG. 3 is a diagram showing FIG. 2 in another format. FIG. 4 is a diagram showing a scenario in this processing. During this scenario, the user can work normally with the mouse without any problems.

Description of the Structure In order to transfer data from the computer 6 to the smart card reader 8 using the same serial port as the mouse 9, the driver of the mouse 3 needs to be disabled. As a result, it is possible to proceed to data transfer without causing any problem in cursor control by the mouse.

It is necessary to create a new driver for controlling the driver of the mouse 3 and the serial port of the computer.

The transmission path is directly connected to a smart card reader UART (universal asynchronous transmission receiver) 7 and a mouse 9. When the user system is started, only the mouse driver can use the transmission line to detect the mouse, and thereafter, the smart card application can use it at any time.

The UART of the card reader disconnects the mouse when receiving data, and immediately returns a response to the computer. Therefore, the user of the mouse is not bothered by the transmission of the discrete data.

When the computer 6 is not inquired about data, the UART 7 of the card reader confirms that the data request has been received, and notifies the computer 6.
The computer 6 then applies an interrogation scenario until the smart card reader 8 receives the data request. This inquiry scenario has been described above and is shown in FIG.

In this process, the computer 6 is the master, and the card reader UART 7 is the slave.

FIG. 3 shows the configuration used. 1 Card Reader Application 2 User System 3 Mouse Driver 4 Card Reader Driver (Other Interface Driver-Software Interface) 5 Universal Asynchronous Transmission Receiver UART 8250-Serial Port 6 Computer 7 Card Reader UART Interface 8 Card Reader 9 Mouse 10 Control Switch

An inquiry scenario is as follows. The response time of the smart card reader 8 can be several minutes, during which the mouse 9 must not be disabled. Also, during the response time of the card reader 8,
In order not to disturb the user of the mouse 9, it is necessary to use the inquiry scenario.

The scenario is divided into three phases. In the first phase, a key data request is sent to the smart card reader 8,
The smart card reader 8 sends information confirming that the main data request has been received. In a second phase, using a scenario-based query procedure, the smart card reader 8 determines whether it has received data from a card (not shown) and is ready to send a key data request. Investigate whether it is. In the third phase, the data is retrieved before responding to the main data request.

FIG. 4 shows a scenario. 1 Primary data request 2 Response OK 3 Phase 1 4 Data request OK 5 Response OK 6 Phase 2 7 Data request 8 Phase 3 9 Primary data response

During this scenario, the user can work normally with the mouse 9 without any problems.

It should be noted that the mouse 9 operates when the smart card reader 8 is powered off.

Another embodiment is a “send request” (RTS) from a serial port on a computer.
) And a separate connection provided with a "receivable" (DSR) signal. This connection connects the mouse directly to the computer when the power is off.

If a mouse button is pressed or mouse movement is detected, the mouse sends a fixed format data package to the host at 1200 baud.

Initialization Reset When the mouse is turned on or reset by the host, it immediately sends the letter “M”. The letter "M" indicates that the message conforms to the manufacturer's constructor serial format.

Format of Serial Data Message While transferring data to the host, the mouse outputs the following data format through the manufacturer's constructor serial interface. The format of data transmitted at 1200 baud uses a 9-bit data block consisting of a 7-bit message and 2 control bits.

The mouse controller transmits the following three-byte data package by a manufacturer's serial interface in response to a mouse event. 1 First byte of message data Bit allocation 1 Start bit (always 0) 2 Bit 6 for horizontal movement 3 Bit 7 for horizontal movement (most significant bit) 4 Bit 6 for vertical movement 5 Bit 7 for vertical movement ( 6 Press the 2nd button 7 Press the 1st button 8 Always 1 (message synchronization bit) 9 Stop bit (always 1)

2 Second byte of message data Bit allocation 1 Start bit (always 0) 2 Bit 0 for horizontal movement 3 Bit 1 for horizontal movement 4 Bit 2 for horizontal movement 5 Bit 3 for horizontal movement 6 Horizontal direction Movement bit 4 7 Horizontal movement bit 5 8 Always 0 9 Stop bit (always 1)

3 Third byte of message data Bit allocation 1 Start bit (always 0) 2 Bit 0 for vertical movement 3 Bit 1 for vertical movement 4 Bit 2 for vertical movement 5 Bit 3 for vertical movement 6 6 Vertical direction Movement bit 4 7 Vertical movement bit 5 8 Always 0 9 Stop bit (always 1)

UART 8250 UART (Universal Asynchronous Transmit Receiver) controls the serial port interface. The UART 16550 is software and pin compatible with the 8250, but operates on a "first in, first out" (FIFO) principle, and stores an internal latency file that can be enabled or disabled by software. Have.

Normally, the COM1 port uses the address 03F8H, the COM2 port uses the address 02F8H, the COM3 port uses the address 03E8H,
The M4 port uses the address 02E8H. This lowest address is commonly referred to as the base port address, and as shown in the table below, each addressable register is referenced by an address relative to the base port address.

When the DLAB bit of the LCR (communication control register) = 0. 00H DATA: Register for received data in case of read. For lights,
Register for holding transmission (read / write) 01H IER: Interrupt enable register (read / write)

When the DLAB bit of LCR = 1. 00H Baud0: Lower byte (read / write) of swing divider BRG 01H Baud1: Upper byte (read / write) of swing divider BRG

The following does not depend on the DLAB bit. 02H IID: Interrupt identification register (read) and control register FIFO
(Write) 03H LCR: Communication Control Register (Read / Write) 04H MCR: Modem Control Register (Read / Write) 05H LSR: Communication Status Register (Read) 06H MSR: Modem Status Register (Read)

Port 3F8 / 3F9: This is a table (read / write) of the transmission speed and the division ratio when the DLAB bit of LCR = 1. Bit / sec division rate Bit / sec division rate 50 2304 1800 64 75 1536 2000 58 110 1047 2400 48 134 857 4800 24 150 768 9600 12 300 384 19200 6 600 192 38400 3 1200 96 57600 2 1800 64 115 200 Dividing ratio = 1843200 / (transmission speed * 16)

Port 3F8: I when the DLAB bit of the interrupt enable register-LCR = 0
ER (read / write). For read, receive data register. For writes, a register that holds the transmission.

Port 3F9: Interrupt enable register—I when DLAB bit of LCR = 0
ER (Read / Write) Bit Name Binary Meaning 7, 6, 5, 4 Reserved 0000 xxx Reserved (0) 3 EMI xxxx 1xxx Enable interrupts in modem state 2 ELI xxxx x1xx Enable interrupts in communication state Enable 1 ETI xxxx xx1x Enable interrupt of transmission register 0 ERI xxxx xxx1 Enable receive data ready interrupt

Port 3FA: Interrupt Identification Register-IIR (Read Only) Bit Name Binary Meaning 7, 6 FIQ 11xx xxxx 16550 only. Validate the waiting file FIFO. 00xx xxx 8250 and 16550. Invalidate the waiting file FI FO. 5, 4 Reserved xx00 xxxxxx Reserved (0) 3 TINT xxxx x1xx 16550 only. Session output interrupt. Waiting for processing. xxxx x0xx 8250 and 16550. 1, 2 SINT xxxx x00x Modem state interrupt. This bit is changed in MSR. xxxx x01x Interrupt of transmission register. Retain registers. xxxx x10x Transmission empty. LSR bit is set to 1. xxxx x11x Receive data preparation interrupt. When the register data is full, set the SR bit to 1. Bit error in BREAK or LSR due to communication status interrupt. 0 IP xxxxxxxxx1 interrupt pending. (Not an active interrupt) xxxx xxx0 No interrupt waiting to be processed.

Port 3FA: Register of 16550 for controlling FIFO—FCR (read only) Bit Name Binary Meaning 7, 6 TL 00xx xxx Trigger for interrupting FIFO receiver = 1 byte 01xx xxx Trigger for interrupting FIFO receiver Level = 4 bytes 10xx xxxxxx Trigger for interrupting FIFO receiver Level = 8 bytes 11xx xxx Trigger for interrupting FIFO receiver = 14 bytes 5,4 Reserved xx00 xxx Reserved (0) 3 Reserved xxx1xxxx0 Change the RXRDT and TXRDY pins to mode 1. 2 Empty CLT xxx x1xx FIFO emitter. 1 CLR xxxxxx xx1x Empty FIFO receiver. 0 IP xxxxxx1 Enable emptying of emitter and receiver FIFO files.

Port 3FB: Communication control register-LCR (read / write) Bit name Binary Meaning 7 DLAB 0xxx xxx Relative address 0 is returned to data, and relative address 1 is returned to IER. Address 1xxx xxx Relative addresses 0 and 1 return to the address of the controlling divider swing BR. 6 SETBRK x0xx xxxx Normal UART operates. Interrupt control x1xxx xxxx Sends an interrupt signal. 5, 4, 3 GENPAR xxxx 0xxx No parity bit. xx00 1xxx Parity bit = odd xx01 1xxx Parity bit = even xx10 1xxx Parity bit = 1 xx11 1xxx Parity bit = 0 2 XSTOP xxxx x0xx One stop bit. Stop xxxx x1xx Stop bits are 2 bit bits. (1.5 bits for WL = 5) 1,0 WD5 xxx xx00 Word length = 5 WD6 xxx xx01 Word length = 6 WD7 xxxxx10 Word length = 7 WD8 xxxxx11 Word length = 8

Port 3FC: Modem Control Register-MCR (Read / Write) Bit Name Binary Meaning 7, 6, 5 Reserved 000x xxx Reserved (0) 4 TEST xxx1 xxxx Enables UART self-diagnosis test. 3 OUT2 xxx 1xxx Controls the interrupt signal of 8250. (User 2 output) 2 OUT1 xxxx x1xx Restart 1200 baud internal modem. (User 1 output) 1 RTS xxxx xx1x Send RTS output 1 to RS232C connector. 1 DTR xxxx xxx1 Send DTR output 1 to RS232C connector.

Port 3FD: Communication Status Register-LSR (Read Only) Bit Name Binary Meaning 7 PE / FE 1xxx xxx Use 16550 PE / FE interrupt 0xxxxxxxx 8250 or 16450 in FIFO file / interr. 6 TSRE x1xx xxx Register for empty transmission offset. 5 THRE xx1x xxx Register holding empty transmission. 4 BI xxx1 xxx Receive interrupt. 3 FE xxxx 1xxx Frame error. 2 PE xxxx x1xx Parity error. 1 OE xxxx xx1x Overshoot error. 0 DR xxxx xxx1 Data can be received.

Port 3FE: Modem status register-MSR (read only) Bit name Binary Meaning 7 DCD 1xxx xxx Data carrier detection level 6 RI x1xx xxx Call signal level 5 DSR xx1xxxx "Receivable" level 4 Cxxxxx "Transmission possible" level 3 DCDC xxxx 1xxx DCD change. 2 Change of RIC xxxx x1xx RI 1 Change of DSRC xxxx xx1x DSR 0 Change of CTSC xxxx xxx1 CTS

[Brief description of the drawings]

FIG. 1 is a diagram showing an actual configuration.

FIG. 2 is a simplified schematic diagram of a device according to the present invention.

FIG. 3 is a diagram showing FIG. 2 in another format.

FIG. 4 is a diagram showing a scenario in this processing.

[Explanation of symbols]

 1 Card Reader Application 2 User System 3 Mouse Driver 4 Card Reader Driver (Other Interface Driver: Software Interface) 5 Universal Asynchronous Transmission Receiver UART8250: Serial Port 6 Computer 7 Card Reader UART Interface 8 Card Reader Hardware 9 Mouse 10 controlled switch

[Procedural Amendment] Submission of translation of Article 34 Amendment of the Patent Cooperation Treaty

[Submission date] February 3, 2000 (200.2.3)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Jennebo, Philippe France F-06000 Nice-Leu Massena 24 Cabinet-Otier-O-Fis Mediterranean de Bourbe-d'Ambancion-de-Marc (72) Inventor Lefebvre, Michael France Country F-06000 Nice-Leu Massena 24 Cabinet-Otier-Office Mediterranean de Bourvain d'Ambition E de Marc F-term (reference) 5B014 HC08 HC11 5B077 AA04 AA21 HH02

Claims (6)

[Claims] 1. A method for connecting another peripheral device (B) to the same port as a serial port of a computer already used by the peripheral device (A), comprising disabling a driver of the application (A). Create a new driver to enable data transfer without causing problems for the cursor controlled by the application (A) and to control the driver of the application (A) and the serial port of the computer (6). The transmission path is directly connected to the universal asynchronous transmission receiver (UART) (5) of the application (A) and the application (B), and only the driver of the application (A) transmits to detect the startup hardware. And make the transmission path available to the application (B) at any other time. The reader's UART (7) disconnects the application (A) immediately upon receiving the data and immediately sends a response to the computer (6). If the computer (6) does not request data, the card reader's UART (7) UA
RT (7) confirms that the data request has been received and notifies computer (6), which applies the query scenario, in which computer (6) is the master and application (B) Operating as a slave. 2. The inquiry scenario: sending a key data request to a card reader (1), wherein the card reader (1)
A portion for sending information confirming that the request was successfully received; and using the query, whether the smart card reader (1) received data from the card, and ready to send a key data request. 2. The method of claim 1, further comprising the steps of: recognizing whether or not there is a request; and retrieving data in response to a primary data request. 3. When a power supply of the smart card (1) (or another peripheral device) is cut off, a “transmission request” (RT) from a computer having a serial port is performed.
Method according to claim 1, characterized in that the mouse (9) of the computer (6) is directly connected by an additional connection by means of S) and a "ready to receive" (DSR) signal. 4. Apparatus for performing the method of claim 1, wherein another peripheral device (B) is connected to the same computer serial port as the port already used by the peripheral device (A). At the computer level, connected to a driver of a peripheral device (A) (already used in a serial port) operating as a "slave driver (3)" and operating as a communication management means. and functions as an interface (UART ₁₎ (7) connected to the to the "main driver (4)", with new "driver" which is another software interface, the level of new interface of other peripheral devices (B), the controlled switch (10), and an interface that operates as a communication unit (UART ₂₎ (7) is provided, 2 elements of these are connected to each other and the peripheral device (A) is already a physical interface (UART ₁₎ a computer (6) used (5) is also connected and wherein the Rukoto . 5. The device according to claim 1, wherein the peripheral device (A) used at the serial port of the computer (6) is a mouse (9). 6. The device according to claim 1, wherein the other peripheral device (B) is a smart card reader (1).