JPH11313128A - Data transfer method and data transmitter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To transfer data by connecting data equipments such as a data terminal and a data logging tool in common by one serial line cable to a data transmitter such as a portable telephone provided with a data communication function without using an identification code. SOLUTION: In the case of connecting the data terminal 20 to the data transmitter 10, the data terminal 20 activates the transfer request signal line 406 of the serial line cable 40 and transfers the data. In the case of connecting the data logging tool 30 to the data transmitter 10, the data logging tool 30 disconnects or inactivates the transfer request signal line 406 of the serial line cable 40 and accesses the data transmitter 10. The data transmitter 10 monitors the potential of the transfer request signal line 406 and switches a data transfer processing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transfer method and a data transmission device, and more particularly to a data transfer method and a data transmission device suitable for use in a communication terminal such as a portable telephone or a car telephone capable of data communication. It is about.

[0002]

2. Description of the Related Art In recent years, with respect to portable telephones, automobile telephones, and the like, communication networks have been developed and expanded, and the range of communication has expanded, and the use thereof has become remarkable. In addition, portable terminals and the like are provided in small and low-priced ones due to high integration of circuits and the like, and high-performance and data-communicable ones are being provided by adoption of high-performance microprocessors and the like. is there.

Conventionally, for example, when data is transmitted from a data device such as a personal computer by a mobile phone, a predetermined protocol processing circuit for data communication is added to the mobile phone, and this circuit is connected to the outside. Prepare a possible line interface. As the line interface, for example, an asynchronous serial line such as RS-232C is applied, an RS-232C cable is connected to a personal computer equipped with a modem, etc., and data transferred from the computer is transmitted via a wireless line. Was to be transmitted.

On the other hand, when verifying a control function or the like of a mobile phone added by adding a service or the like, or when verifying the operation of a control unit during development, a main control unit such as a microprocessor is accessed. In some cases, the control data or data stored in accordance with the operation is read out to the outside and the function is verified based on the data. In this case, for example, it is necessary to provide an input / output interface or an input / output terminal for externally accessing the microprocessor or the storage circuit.

[0005]

However, according to the above-mentioned conventional technique, a connection terminal for a line interface for data transfer with another data device at the time of data transmission and an input / output at the time of data verification are not provided. A connection terminal for the interface must be provided, and the mounting space for the connection terminal becomes large, which is disadvantageous in miniaturization.

Therefore, the inventor of the present application realizes data transfer between devices at the time of data transmission and data transfer at the time of function verification using a common connection terminal, for example, an RS-232C cable. I thought. However, in this case, the connected data device must be identified.
For example, a common port on a personal computer
Peripheral devices send an identification number unique to each device to a computer, identify this by the computer, and perform control or data transfer according to each device. However, when the identification code is transmitted, there is a problem that it takes time and effort to control the code transmission procedure, and it takes time to transmit the code.

SUMMARY OF THE INVENTION The present invention solves the above-described problems, and connects at least two types of data devices in common with a single connection terminal, immediately identifies which data device is connected, and stores An object of the present invention is to provide a data transfer method and a data transmission device capable of performing data transfer according to a device.

[0008]

According to the data transfer method of the present invention, at least two methods are provided for solving the above-mentioned problems.
A data transfer method for connecting any one of data devices of any type to a data transmission device via a predetermined serial line and transferring data between the data transmission device and the data device. Prepare a transfer request signal line for requesting data transfer to the data transmission device, and when one data device is connected to the data transmission device via a serial line, one data device sets the transfer request signal line When data transfer is performed with the transmission device and the other data device is connected to the data transmission device via a serial line, the other data device sets the transfer request signal line to the non-connected or inactive state. Transfer data to and from the data transmission device, and the data transmission device to which one of the data devices is connected via the serial line transmits the transfer request signal. To monitor the line, to identify whether the data transfer from any data device based on the potential of the transfer request signal line, and switches the data transfer processing in accordance with each of the data devices.

In this case, it is advantageous to apply an RS-232C asynchronous serial line to the serial line and use the RS-232C transmission request signal line as a transfer request signal line.

One of the data devices is a data terminal that transmits and receives data to and from another data terminal via a data transmission device. After setting the transfer request signal line of the serial line to the active state of high potential or low potential,
Data transfer may be performed.

Further, the other data device is a data logging tool for reading or writing stored data including control data of the data transmission device. The data logging tool is not connected to the transfer request signal line of the serial line or is inactive. In this state, the control unit including the storage unit of the data transmission device may be accessed.

Further, the data transmission device is a portable radio transmission / reception device for transmitting data via a radio line, and the radio transmission / reception device has at least the potential of a transfer request signal line of a serial line in an active state. In this case, the data transferred from the data device is transmitted via a wireless line in a predetermined control procedure, and in response to an access from the data device when the potential of the transfer request signal line is in a non-connected or inactive state. It is preferable that stored data including control data can be read or written.

On the other hand, a data transmission device according to the present invention is a data transmission device in which at least one of at least two types of data devices is connected via a predetermined serial line, and performs data transfer with one data device. First to control processing
Transfer processing control means for controlling data transfer processing between the other data device and the first transfer processing control means;
A line interface for interfacing between the transfer processing control means and the second transfer processing control means and the serial line, the line interface comprising: a signal line monitoring means for monitoring a potential of a transfer request signal line of the serial line; A switching unit that switches data from the data device to either the first transfer processing control unit or the second transfer processing control unit based on the monitoring result of the signal line monitoring unit.

[0014] The first transfer processing control means is a communication control unit for forming data transferred via a serial line to / from a data device as data of a predetermined protocol for transmission to another transmission path. Means may be included.

Further, the second transfer processing control means includes command control means for supplying to the main control section command data for reading or writing stored data including control data of the main control section for controlling data transmission. Good.

Preferably, the serial line is an RS-232C asynchronous serial line, and the signal line monitoring means of the line interface includes voltage detecting means for detecting the potential of the RS-232C transmission request signal line.

Advantageously, the data transmission device according to the present invention is a portable wireless transmission / reception device for transmitting data via a wireless line.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a data transfer method and a data transmission apparatus according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows an embodiment of a data transfer method according to the present invention. The data transfer method according to the present embodiment is applicable when any one of the two types of data devices (DTE-A) 20 and (DTE-B) 30 is connected to the data transmission device (DCE) 10 through the common serial line 40. For example, as shown in FIG. 1 (a), one data device 20 transfers data to the data transmission device 10 by setting the transfer request signal line (RS) 406 of the serial line 40 to active. Further, as shown in FIG. 1 (b), the other data device 30 transfers data to and from the data transmission device 10 with the transfer request signal line 406 disconnected or inactive. In these cases, the data transmission device 10 monitors the potential of the transfer request signal line 406, identifies which of the data devices 20, 30 the data transfer is from, and responds to the respective data devices 20, 30. To switch the data transfer process.

For example, the serial line 40 of the present embodiment
RS-232C cable is applied effectively. In FIG. 1, a first signal line (SD) 402 is a data transmission line for transmitting data from the data devices 20 and 30 to the data transmission device 10, and a second signal line (SD)
A signal line (RD) 404 is a data reception line for receiving data from the data transmission device 10 at the data devices 20 and 30. Third
The signal line (RS) 406 is a transmission request signal line for requesting data transmission from the data device 20 to the data transmission device 10, and in the present embodiment, when the other data device 30 is connected, the connection is not connected or Inactive, when one data device 20 is connected, active
This is a transfer request signal line for requesting data transfer to 10. 4th
Signal line (CS) 408 is connected to the data
20 and 30 are transmission permission signal lines for requesting permission of data transfer, and the fifth signal line (SG) 410 is a ground line.

FIG. 2 shows a main part of a data transmission apparatus 10 applied to the present embodiment. The data transmission device 10 according to the present embodiment is a data transmission / reception device that transmits data transferred from a data terminal such as a personal computer via a predetermined transmission path. The case where the present invention is applied to a telephone device will be described as an example.

More specifically, the data transmission device 10 of the present embodiment
2, includes a main controller 100, a first data transfer controller 102, a second data transfer controller 104, and a line interface 106.
6 includes an RS signal monitoring unit 110, a transmission driver 112, a reception driver 114, and a changeover switch 116.

The main control unit 100 includes, for example, a CPU (c) that controls each unit of a transmission / reception circuit (see FIG. 3) of a mobile phone described later.
Including a central processor unit) and advantageously including a storage circuit such as an electrically erasable and rewritable memory (EEPROM) storing the control program and control data of the CPU and a RAM (read only memory) storing various data .
In particular, in this embodiment, a data communication function is added in addition to the voice call function, and for example, by rewriting or adding control data, for example, a change in data transmission speed or addition of another service function can be performed. .

The first data transfer control unit 102 controls data transfer between a data terminal such as a personal computer and the main control unit 100. For example, a UART (universal a
A communication control circuit such as a synchronous receiver-transmitter, which converts data serially transferred from the data terminal into predetermined protocol data and
0 is a communication control circuit for controlling data transfer in the opposite direction.

The second data transfer control unit 104 is an internal data access circuit for accessing the main control unit 100 including a storage circuit, and reads command data for reading or writing stored data including control data from the storage circuit. It receives the command from outside and generates the execution command to
And a command control circuit for accessing the.

The line interface 106 is connected to an RS-232C cable to connect the asynchronous serial line to the first data transfer control unit 102 or the second data transfer control unit 104.
In particular, in this embodiment, the transfer data is transferred to the first data transfer control unit 102 or the second data transfer control unit 104 according to the connected data devices 20 and 30 in this embodiment. Selective connection to

More specifically, the RS signal monitoring unit 110
This is a signal line monitoring circuit that is connected to the transfer request signal line (RS) 406 of the -232C cable 40 and monitors its potential. In the present embodiment, the potential of the transfer request signal line (RS) 406 is high or low. A voltage detection circuit is provided for supplying the result to the main control unit 100 and the changeover switch 116 when the potential becomes an active state.

The transmission driver 112 is connected to a data reception line (RD) 404 of an RS-232C cable, and serially transmits data from the first data transfer control unit 102 or the second data transfer control unit 104. It is a drive circuit.

The reception driver 114 is connected to a data transmission line (SD) 402 of an RS-232C cable, and transmits the serially transferred data to the first data transfer control unit 102 or the second This is a driving circuit that supplies the data transfer control unit 104 with the data.

The changeover switch 116 is a connection circuit for connecting the reception driver 114 to either the first data transfer control unit 102 or the second data transfer control unit 104 in response to the detection result of the RS signal monitoring unit 110. In this embodiment, when the RS signal monitoring unit 110 detects the active state, the receiving driver
A switching circuit 114 is connected to the first data transfer control unit 102 and connected to the second data transfer control unit 104 when a zero potential or a non-connected inactive state is detected.

On the other hand, in FIG. 3, the data transmission apparatus 10 of the present embodiment is a baseband processing circuit which operates as a transmission / reception circuit of a mobile phone under the control of the main control unit 100.
202, modulation circuit 204, demodulation circuit 206, high-frequency circuit 2
08 and an audio processing circuit 210. The baseband processing circuit 202 is a signal processing circuit for assembling the voice code from the voice processing circuit 208 or the data from the main control circuit 100 into a predetermined frame or slot, and decomposing the received frame or slot into the original code and data. For example, TDMA (time division multiple acc
This is a TDMA processing circuit for generating and restoring a slot of the ess) method by time division processing.

The modulation circuit 204 is a baseband processing circuit 20
2 is a modulator that modulates the slot from 2 at the frequency of the desired channel. For example, in this embodiment, QPSK (quadra
turephase shift keying).

The demodulation circuit 206 is a demodulator for demodulating a slot addressed to the own station, and shares a frequency synthesizer or the like with the modulation circuit 204 in order to switch to the same frequency as the frequency channel in the modulation circuit 204.

The high frequency circuit 208 receives the TD from the modulation circuit 206.
It includes a transmitting circuit for amplifying the MA slot and transmitting the amplified signal through the antenna 212, and a receiving circuit for selectively receiving its own frequency channel from the TDMA frame received via the antenna 212. Advantageously, it is preferable to provide two reception systems to perform diversity reception.

The audio processing circuit 210 is an audio processing circuit connected to a handset including a microphone and a speaker, and including an encoding circuit for highly efficient encoding of an inputted audio signal and a decoding circuit for decoding a received audio code. is there.

The operation of the data transmission apparatus having the above configuration will be described together with the data transfer method according to the present embodiment. First, when data is transmitted from a data terminal such as a personal computer, FIG. As shown, the data transmission device 10 and the data terminal 20 are connected via the RS-232C cable 40.

Next, the power of the data terminal 20 is turned on,
When the communication software or the like is started and the preparation for the transmission is completed, the data terminal 20 activates the transmission request signal line (RS) 406 of the RS-232C cable 40 to set its potential to, for example, a high potential. Thus, in the data transmission apparatus 10, when the RS signal monitoring unit 110 of the line interface 106 detects the potential of the transmission request signal line (RS) 406, the detection result is supplied to the main control unit 100 and the changeover switch 116.

As a result, the main control unit 100 receiving the detection result from the RS signal monitoring unit 110 performs a predetermined procedure such as link setting of a radio line with the radio base station to prepare for data communication. do. On the other hand, the changeover switch 116 that has received the result of the high potential detection from the RS signal monitoring unit 110 switches the connection of the reception driver 114 to the first data transfer control unit 102 and waits for data transfer from the data terminal 10.

In this state, the data terminal 20 sends the RS-2
When the transmission data is serially transferred to the data transmission device 10 via the data transmission line (SD) 402 of the 32C cable 40, the data is amplified by the reception driver 114, and is amplified by the first switch via the changeover switch 116. The data is supplied to the data transfer control unit 102. As a result, the serially transferred data becomes the first
The data is converted into predetermined protocol data by the data transfer control unit 102 and supplied to the baseband processing circuit 202 via the main control unit 100.

Next, the data supplied to the baseband processing circuit 202 is assembled in a predetermined slot under the control of the main control unit 100, further modulated by the modulation circuit 204, and transmitted from the high-frequency circuit 208 to the antenna. Sent via 212.

Similarly, the data terminal 10 is connected to the cable 40
The data transmitted through the data transmission device 10 is transmitted from the reception driver 114 of the data transmission device 10 to the first
Is transmitted to the data transfer control unit 102, and is further converted into protocol data for data communication and transmitted via a wireless line.

On the other hand, the high frequency circuit 20
8 is demodulated by the demodulation circuit 206 and further decomposed by the baseband processing circuit 202 to become reception data, which is supplied to the first data transfer control unit 102 via the main control unit 100. You. As a result, the first data transfer control unit 102 converts the received data into serial data, sends it to the transmission driver 112, and transfers it to the data terminal 20 via the RS-232C cable 40.

As described above, the transfer data from the data terminal 20 is transmitted through the data transmission device 10, and the data received by the data transmission device 10 is transferred to the data terminal 20, and the data transmitted by the mobile phone is transmitted. Communication is performed.

On the other hand, when a data device 30 such as a data logging tool is connected to the data transmission device 10 in order to verify the function of the control data and the like of the data transmission device 10, FIG.
As shown in (b), the data logging tool 30 is connected with the transmission request signal line (RS) 406 of the RS-232C cable 40 disconnected or inactive.

In such a state, in the data transmission apparatus 10, the RS signal monitoring unit 110 monitors the transmission request signal line (RS) 406. Since the state is inactive, the changeover switch 116 is The reception driver 114 is connected to the second data transfer control unit 104.

In this state, when, for example, a command for reading out control data is input by the data logging tool 30, the command data is transmitted to the RS-232C data transmission line (S
D) The received data is received by the reception driver 114 of the data transmission apparatus 10 via 402. The received command data is supplied to the second data transfer control unit 104 via the changeover switch 116.

As a result, the second data transfer control unit 104
Then, the storage circuit is accessed via the main control unit 100 and its control data is read. The read control data is
The data is serially transferred from the second data transfer control unit 104 to the RS-232C data reception line (RD) 404 via the transmission driver 112. As a result, the control data of the data transmission device 10 is recorded in the data logging tool 30, and its function verification and the like are performed.

When writing data, for example, the command data is sent from the logging tool 30 and then the write data is transferred to the storage circuit of the main control unit 100 in the same manner as described above. Is written.

As described above, according to the data transfer method and the data transmission apparatus of the present embodiment, when data is transmitted, the transfer request signal line (RS) 406 of the serial line 40 is activated to perform data transfer and main control. When accessing the storage circuit of the unit 100, the transfer request signal line (RS) 406 is made inactive to read out control data and the like, so that the data transfer according to the type of the data devices 20 and 30 is performed through the common serial line 40. Processing can be executed effectively.

In this case, when the line cable 40 is connected, the potential of the transfer request signal line (RS) 406 is changed to the RS signal monitoring unit.
Since the data devices 20, 30 are identified by detecting them at 110, they can be identified easily and in a short time. Therefore, the cost of the device can be reduced without providing a control procedure for device identification in the data transmission device 10 and without providing two cable connection terminals. In particular, one cable for small mobile phones
Since at least two types of data devices 20 and 30 can be connected at 40, the present invention can be effectively applied to products that require short-term development, such as performing data communication while verifying its functions.

In the above embodiment, the data transmission device 10
Although the present invention has been described by taking as an example the case where the present invention is applied to a mobile phone device, the present invention may be applied to a portable information device capable of data communication or another data transmission device for transmitting data to a transmission path other than a wireless line. Good.

Further, in the above embodiment, the first data transfer control unit 102 for converting into a protocol for data transmission,
Second data transfer control unit 10 accessing main control unit 100
4 is provided in the data transmission apparatus 10 to transfer data between the data terminal 20 and the data logging tool 30. However, in the present invention, the first and second data transfer control The unit does not necessarily have to have the same function as described above. For example, it is sufficient that the first and second data transfer control units control data transfer according to at least connected data devices, such as when transmission is controlled by different protocols.

[0052]

As described above, according to the data transfer method and the data transmission device of the present invention, at least two types of data devices can be commonly connected to the data transmission device by one serial line. In this case, since the data device can be identified easily and in a short time by detecting the potential of the transfer request signal line of the serial line, the data transfer can be started immediately.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of a data transfer method according to the present invention. FIG. 1 (a) is a cable connection diagram between a data transmission device and a data terminal, and FIG. 1 (b) is a data transmission device and a data logging. It is a cable connection diagram of a tool.

FIG. 2 is a block diagram showing a main part of a data transmission device applied to the data transfer method according to the embodiment of FIG.

FIG. 3 is a block diagram showing components of a transmission / reception circuit when the data transmission device according to the embodiment of FIG. 2 is a mobile phone.

[Explanation of symbols]

 10 Data transmission device 20 Data terminal (DTE-A) 30 Data logging tool (DTE-B) 40 Serial line cable 100 Main control unit 102 First data transfer control unit 104 Second data transfer control unit 106 Line interface 110 RS Signal monitoring unit 116 selector switch

Claims (10)

[Claims] 1. A data transfer method for connecting any one of at least two types of data devices to a data transmission device via a predetermined serial line and transferring data between the data transmission device and the data device. In the method, a transfer request signal line for requesting data transfer from the data device to the data transmission device is provided on the serial line, and one data device is connected to the data transmission device via the serial line. Then, the one data device activates the transfer request signal line to execute data transfer with the data transmission device, and connects the other data device to the data transmission device via the serial line. When connected, the other data device transfers data to and from the data transmission device with the transfer request signal line disconnected or inactive. The data transmission device connected to any of the data devices via the serial line monitors the transfer request signal line, and based on the potential of the transfer request signal line, A data transfer method comprising identifying whether data transfer is from a device, and switching to data transfer processing according to each data device. 2. The data transfer method according to claim 1, wherein an RS-232C asynchronous serial line is applied to the serial line, and the RS-232C transmission request signal line is used as the transfer request signal line. A data transfer method, characterized in that: 3. The data transfer method according to claim 1, wherein the one data device is a data terminal that transmits and receives data to and from another data terminal via the data transmission device, The data transfer method, wherein the data terminal sets the transfer request signal line of the serial line to a high potential or a low potential active state when the data communication becomes possible. 4. The data transfer method according to claim 1, wherein the other data device is a data logging tool that reads or writes accumulated data including control data of the data transmission device, and the data logging tool is a data logging tool. And accessing a control unit including a storage unit of the data transmission device in a state of being disconnected or inactive from the transfer request signal line of the serial line. 5. The data transfer method according to claim 1, wherein the data transmission device is a portable wireless transmission / reception device that transmits data via a wireless line, and the wireless transmission / reception device is at least the serial line. When the potential of the transfer request signal line is in an active state of a high potential or a low potential, the data transferred from the data device is transmitted via a wireless line in a predetermined control procedure, and A data transfer method comprising: receiving an access from the data device to a main control unit including a storage unit of the own device when a potential of a transfer request signal line is disconnected or inactive. 6. A data transmission device to which one of at least two types of data devices is connected via a predetermined serial line, wherein the device controls a data transfer process with one of the data devices. A first transfer processing control means, a second transfer processing control means for controlling data transfer processing with the other data device, the first transfer processing control means and the second transfer processing control means, A line interface for interfacing with the serial line, wherein the line interface is based on a signal line monitoring means for monitoring a potential of a transfer request signal line of the serial line, and a monitoring result of the signal line monitoring means. Switching means for switching data transfer from the data device via either the first transfer processing control means or the second transfer processing control means. Data transmission device according to claim. 7. The data transmission apparatus according to claim 6, wherein said first transfer processing control means transfers the data transferred via said serial line to / from said data device to another transmission path. A data transmission device comprising communication control means for forming as data of a predetermined protocol at the time of transmission. 8. The data transmission device according to claim 6, wherein the second transfer processing control means reads or writes stored data including control data of a main control unit that controls data transmission. A data transmission device comprising command control means for supplying a command to a main control unit. 9. The data transmission apparatus according to claim 6, wherein said serial line is an RS-232C asynchronous serial line, and said signal line monitoring means detects a potential of an RS-232C transmission request signal line. A data transmission device, comprising: 10. The data transmission device according to claim 6, wherein the device is a portable wireless transmission / reception device that transmits data via a wireless line.