JP2004120036A - Mobile communication terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the processing other than data writing from being not executed for a long time when the data of a large capacity are written from a memory of an electronic apparatus main body to an external storage medium. <P>SOLUTION: A flowchart of the mobile communication terminal includes: a step S2 of calculating a size of written data; a step S3 of thereafter executing processing of a preferential interruption with priority when the interruption is discriminated; and steps S5 to S7 of executing write of partial data, which may be finished in a short period of time, when the step S3 discriminates absence of preferential interruption, and then newly confirming the presence / absence of the preferential interruption. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mobile communication terminal, and more particularly to a mobile communication terminal capable of storing a storage medium and writing data therein by incorporating or connecting an external storage device to a main body.
[0002]
[Prior art]
In the case of stationary electronic devices such as personal computers, it is common to read and write data by storing a storage medium in an external storage device built in or connectable to the main body. Similar functions are being demanded for devices. For example, in the case of a portable wireless communication device, the use of flash memory is not limited to the exchange of telephone and text mail, but is expanding to the handling of various and large-capacity contents such as music, still images, and moving images. Etc., a slot for accommodating an external storage medium, and a function of reading and writing the same are inevitably required.
[0003]
In the case of a portable electronic device, there are greater restrictions on the power supply capacity, the processing capability of the processor, and the like than on a stationary electronic device, and various methods have been proposed to cover this point. The invention disclosed in Patent Literature 1 is an example of this, in which a video signal obtained as a result of shooting by a video recording device is compressed for each predetermined section and stored in a buffer memory. When writing to such an external storage medium, the external storage device incorporating the external storage medium is set to a recording operation state only for a period necessary for the writing operation, and is in a rest state for other periods (in the case of a hard disk device, only the motor rotates and the magnetic head (A so-called idle state which is evacuated from the disk) to suppress power consumption and heat generation.
[0004]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 9-270985 (page 1-2, FIG. 1)
[0005]
[Problems to be solved by the invention]
The above-described conventional technology is a technology suitable for handling a large amount of data such as a moving image in a single-function use only for recording a video, but is not suitable for a mobile communication device. In functional applications, it cannot be applied as it is.
[0006]
For example, in the case of writing moving image data from the internal memory of the portable wireless communication device to the memory card, it takes tens of seconds of writing time with the processing capacity of the current ordinary portable wireless communication device, and it seems that there was an incoming call during that time. In such a case, the message may not be displayed and a response may not be made. In order to deal with such a problem, it is not sufficient to simply provide an idle period of the external storage device.
[0007]
Therefore, the present invention provides a data writing control method and a data writing control method that can perform high-priority operations other than writing during a pause period of a writing operation when writing large-capacity data from an internal memory of an electronic device to an external storage medium. An object is to provide an electronic device.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a mobile communication terminal according to the present invention is a mobile communication terminal including a control unit that controls writing and reading of data to and from a storage medium stored in an external storage device, wherein the control unit includes: When a write request to a storage medium is received, the data according to the write request is compared with a registered reference data size. In the case where the data is written to the reference data size or more, the data to be written is divided into the reference data size units, and the writing process is executed by a plurality of discontinuous write operations.
[0009]
According to the present invention, processing other than writing can be executed each time by dividing the time for writing large-capacity data to the external storage medium, so that writing can be performed without impairing the original function.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
(First Embodiment)
Hereinafter, a first embodiment of a data writing control method and an electronic device according to the present invention will be described with reference to FIG. 1 and FIG. The first embodiment of the present invention is an embodiment in which the present invention is applied to a portable wireless communication device, and FIG. 1 is a block diagram thereof. In the figure, 1 is an antenna, 2 is a transmission / reception switching unit, 3 is a transmission unit, 4 is a reception unit, 5 is a modulation / demodulation unit, 6 is a vocoder unit, 7 is a voice-electric conversion unit and an AD conversion unit, and 8 is a DA conversion unit. And a driver, 9 is a transmitter, and 10 is a receiver. These are generally included in the configuration of the portable wireless communication device.
[0011]
Next, reference numeral 11 denotes a control unit, which is also generally included in the configuration of the portable wireless communication device, and reference numeral 12 denotes an interrupt processing unit, which is generally provided in many cases. These operations in the first embodiment will be described later in detail. In FIG. 1, the interrupt processing unit 12 is connected only to the modulation / demodulation unit 5 except for the control unit 11, but the present invention is not limited to this, and may be connected to other configurations.
[0012]
Further, 13 is an internal memory, 14 is a memory card slot, 15 is a memory card, 16 is a main display driver, 17 is a sub display driver, 18 is a main display, 19 is a sub display, 20 is an operation input unit, Reference numeral 21 denotes a camera, 22 denotes a power supply unit, and 23 denotes a battery. Among them, the internal memory 13, the main display unit driver 16, the main display unit 18, the operation input unit 20, the power supply unit 22, and the battery 23 are also generally included in the configuration of the portable wireless communication device.
[0013]
Next, the memory card 15 is an external storage medium such as an SD memory card (trademark), and functions as an external storage device of the portable wireless communication device when inserted into the memory card slot 14. A large amount of data such as still images, moving images, music, etc. is written and stored in the memory card 15, and the stored memory card 15 is removed from the memory card slot 14 and inserted into another electronic device such as a personal computer. It can be used like using. Note that a storage medium other than the memory card (for example, a PC card type hard disk) may be used.
[0014]
The sub-display driver 17, the sub-display 19, and the camera 21 are provided for the purpose of expanding functions or improving convenience, and may have a configuration that does not include them, or may have other functions or convenience. A configuration including elements other than these for the purpose of improvement may be used.
[0015]
Further, the configuration according to the first embodiment of the present invention described above is functionally divided, and a configuration configured based on a division of a component or a circuit board, etc., which does not necessarily coincide with this in terms of mounting. Is also included.
[0016]
Next, the operation of the electronic device (portable wireless communication device) according to the first embodiment of the present invention will be described with reference to FIG. FIG. 2 is a flowchart according to the first embodiment of the present invention.
[0017]
First, the operation input unit 20 performs an operation of designating data to be written to the memory card 15 from the internal memory 13 and instructing writing (step S1). Then, the control unit 11 calculates the size of the data to be written to the memory card 15 (the value is Z) based on the above designation and the memory management function generally provided as a control unit of the portable wireless communication device. (Step S2).
[0018]
Next, the control unit 11 refers to the interrupt processing unit 12 and checks whether or not there is an interrupt to be processed prior to the data write processing to the memory card 15 (step S3). For example, when an incoming voice call is received, the incoming call is demodulated in the modem 5 via the antenna 1, the transmission / reception switching unit 2, and the reception unit 4, and the interrupt processing unit 12 detects this, and The flag of "call interrupt present" is set. Also, it is assumed that the priority of this interrupt is set higher than the data writing to the memory card 15.
[0019]
Then, the control unit 11 executes the incoming call process having a higher priority than the data writing to the memory card 15 (“YES” in step S3 and step S4), and thereafter ends the process.
[0020]
On the other hand, when there is no interrupt having a higher priority than writing data to the memory card 15 (“NO” in step S3), the previously calculated data size Z is continuously written to the memory card 15. (Step S5). It is assumed that the size of the unit data is determined in advance according to an allowable value of a continuous writing time to the memory card 15 (a time during which other processing cannot be executed). This value may be set, selected, or changed by an operation on the operation input unit 20.
[0021]
As a result of the comparison in step S5, if Z is equal to or smaller than the size of the unit data ("YES" in step S5), all data is continuously written to the memory card 15 (step S6), and the process is thereafter terminated. I do. This is because the continuous writing time can be shorter than the allowable value.
[0022]
Conversely, if Z exceeds the size of the unit data, the partial data that is part of the data to be written to the memory card 15 and whose size (V) is equal to or less than the size of the unit data is 15 (step S7). Thus, the writing of the partial data is executed within the allowable time of the continuous writing. Thereafter, the value of Z is rewritten with the size (Z−V) of the data that has not been written yet (step S8), and the process returns to the confirmation of the presence or absence of the priority interrupt (step S3). Subsequent processes are as described above, and thus description thereof will not be repeated.
[0023]
Although the value of V may be a constant, it may be set each time partial data is written based on the data configuration or the like. In addition, following step S2, a processing flow in which all data is divided into a plurality of partial data having a size equal to or smaller than the size of the unit data and these are sequentially written to the external storage device may be considered.
[0024]
Although the first embodiment of the present invention has been described taking a portable wireless communication device as an example, the present invention is not limited to a portable or wireless communication device, and may be implemented with any electronic device using an external storage medium. be able to.
[0025]
According to the first embodiment of the present invention, when large-capacity data is written to an external storage device, the presence or absence of a priority interrupt is checked every time the writing of partial data that can be written within the allowable time is completed, so that a long time can be obtained. Can be prevented from being able to execute other processes.
[0026]
(Second embodiment)
Next, a data writing control method and an electronic apparatus according to a second embodiment of the present invention will be described with reference to FIGS. The second embodiment of the present invention is an embodiment in which the present invention is applied to a portable wireless communication device, similarly to the first embodiment, and a block diagram (FIG. 1) is common to the first embodiment. It is. FIG. 3 is a flowchart according to the second embodiment of the present invention.
[0027]
In the figure, the processing up to step S3 is common to FIG. In the first embodiment of the present invention, after execution of the priority interrupt processing, the data write operation is terminated even when all the data has not been completely written to the memory card 15, so that the remaining data must be written. There was an inconvenience that the processing had to be started again. Therefore, in the second embodiment of the present invention, after executing the priority interrupt processing (step S4a), the process returns to the confirmation of the presence or absence of the priority interrupt (step S3) so that the processing can be continued. The processing after the processing of all priority interrupts is completed ("NO" in step S3) is the same as that in FIG.
[0028]
According to the second embodiment of the present invention, an additional effect is obtained that the data writing to the external storage medium can be continued without performing a start operation again even after the execution of the priority interrupt processing. Can be It should be noted that the present invention is not limited to a portable or wireless communication device, and can be implemented with any electronic device using an external storage medium, as in the first embodiment.
[0029]
【The invention's effect】
According to the present invention, high-priority interrupt processing can be appropriately performed while continuously writing large-capacity data from an electronic device to an external storage medium, and high convenience can be realized.
[Brief description of the drawings]
FIG. 1 is a block diagram according to first and second embodiments of the present invention.
FIG. 2 is a flowchart according to the first embodiment of the present invention.
FIG. 3 is a flowchart according to a second embodiment of the present invention.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 antenna 2 transmission / reception switching unit 3 transmission unit 4 reception unit 5 modulation / demodulation unit 6 vocoder unit 7 voice-electric conversion unit and AD conversion unit 8 DA conversion unit and driver 9 transmitter 10 receiver 11 controller 12 interrupt processor 13 internal memory 14 Memory Card Slot 15 Memory Card 16 Main Display Driver 17 Sub Display Driver 18 Main Display 19 Sub Display 20 Operation Input 21 Camera 22 Power Supply 23 Battery

Claims (4)

In a mobile communication terminal including a control unit that controls writing and reading of data to and from a storage medium stored in an external storage device, when the control unit receives a write request to the storage medium, the control unit stores Compared with the registered reference data size, if the data size is equal to or smaller than the reference data size, write the data to be written into the storage medium in a single writing operation, and if the data size exceeds the reference data size, set the data to be written. A mobile communication terminal that divides the data into the reference data size units and executes the writing process by a plurality of discontinuous writing operations. 2. The mobile communication terminal according to claim 1, wherein the control unit interrupts the write process when detecting the occurrence of a process having a higher priority than the write request. When the control unit interrupts the writing process to the storage medium due to the occurrence of the high-priority process, the control unit continues the writing process to the storage medium after the end of the high-priority process. The mobile communication terminal according to claim 2. 2. The mobile communication terminal according to claim 1, further comprising a change unit that changes the registered reference data size.

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