Patent Application
20060006233
The present invention relates to a method of self-detecting and dynamically displaying detected results for a card reader used to read flash memory cards, and more particularly to a method of self-detecting and dynamically displaying detected results for a card reader that enables timely display on a screen of a computer the most current state of each card slot on the card reader or of the flash memory card inserted in the card slot.
Flash memory cards are high-capacity storing media developed to meet consumers' demands in storing the huge amount of information and data, and have been widely adopted by consumers to replace the conventional floppy disk. The flash memory cards also lead to the prosperous development in the card reader industry.
Several years ago, the flash memory cards were popular only in the field of digital camera, and most of them were directly connected to a computer via a USB data transmission line. The most important function of the flash memory card at that time was to store photos taken with a digital camera. However, the flash memory card must be connected to the computer via a transmission line and a driver must be installed in the computer for the flash memory card to work. Inconveniences exist when the flash memory card is to be used on more than one computer. Nevertheless, flash memory cards can be applied in the computer field to store multi-media information and contribute to the development of card readers that are now an important apparatus bridging the flash memory cards and computers.
The main function of the card reader is obviously to serve as a bridge between the flash memory card and the computer to complete data transmission between them. Via the card reader, a user may browse photos stored on the flash memory card, listening music, and storing files on a computer without the need of using a digital camera connected to the computer via a transmission line. The flash memory card is therefore effortlessly upgraded to a mini massive storage device that can be easily carried along with a user. Currently, there are various types of card readers for use with flash memory cards of different specifications, such as, for example, CompactFlash Type I&II (CF), Microdrive (MD), SmartMedia (SM), Memory Stick (MS), MS Pro, MS Duo, MultiMedia Card (MMC), Secure Digital (SD), and the newly developed xD Picture card (xD). With the introduction of the above-mentioned various types of flash memory cards into the market, the card readers also have been developed from the type of one reader one slot to the type of one reader multiple slots to adapt to different flash memory cards.
It is difficult for consumers to have complete ideas about all these flash memory cards currently available in the market. When a card reader is connected to the Microsoft Windows operating system via a universal serial bus (USB), the system would identify how many flash memory cards in the card slots of the card reader are supported by the card reader, and shows the same number of removable hard disks on the screen of the computer. Moreover, no matter whether there is a flash memory card inserted in a card slot, all the currently available card readers are adapted to report the total number of card slots, and the Windows will always show the removable hard disks in the same number as that of the reported card slots. Under the circumstance, it is uneasy for a user to tell which one of the icons of the removable hard disks that represents a specific flash memory card slot. The user could hardly tell from the icons on the screen what type of flash memory card has been inserted in a card slot, particularly when the card reader includes multiple card slots. A conventional method of detecting a current state of a card reader is to show each detected supporting flash memory card as a removable hard disk. The user might very possibly be confused by these additional removable hard disks, and fails to tell from the screen which one of the card slots has a flash memory card inserted therein, and what is the exact type of the inserted flash memory card.
Another problem with most currently available electronic products is there is not any sign before any failure or disorder of such electronic products. From past experiences, the most common reasons for the failure or disorder of an electronic product include aging of internal electronic components or parts, and incorrect operation of the product. When the similar conditions occur on a card reader or a flash memory card inserted therein, it is very possible to loss all the data stored in the memory card, or to seriously damage the computer and other peripherals connected thereto. And, it is impossible for the user to know the damaged state in advance. Therefore, it is desirable to previously detect the most current state of the card reader or the flash memory card inserted therein to avoid the above-mentioned undesired events.
A primary object of the present invention is to provide a method of self-detecting and dynamically displaying detected results for a card reader used to read flash memory cards, so that the most current state of the card slots on the card reader or any flash memory card inserted therein can be timely displayed on a screen of a computer that is connected to the card reader and has supporting software installed therein.
To achieve the above and other objects, the method of the present invention mainly includes the steps of sending out a detecting code to each card slot or a flash memory card inserted therein via detecting circuits provided on and controlled by a control chip in the card reader; storing a detected state code sent back by the detecting circuits in a state register of the control chip; sending the state code from the register to a computer; comparing and determining the state code by part of software in the computer on receipt of the state code; displaying a current state of the card slot or the flash memory card inserted therein on a screen of the computer; and periodically repeating the detecting and displaying. Thereby, the most current state of card slots on the card reader or any flash memory card inserted in the card slot can always be presented before a user.
The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein
Please refer to
In a card reader for use with the method of the present invention, there is provided a control chip for controlling more than one detecting circuit preset on the control chip. Although not shown in the figure, the card reader may either be a type of one reader for one card or a type of one reader for multiple cards. Moreover, since the detecting circuits are known techniques and are indirectly utilized to implement the method of the present invention instead of being a key point thereof, they are not discussed in details herein.
As can be seen from
The detecting circuits include an overcurrent protection. When any one of the card slots and the inserted flash memory card is detected as short-circuited, the control chip will take measures to interrupt the power supply to the specific short-circuited card slot, and temporarily stores the state code in the state register for the computer to retrieve the data later. And, when the part of software in the computer receives the state code, an icon or a color normally displayed for representing the card slot or the flash memory card is immediately changed to inform a user that the specific card slot or the flash memory card inserted therein is currently in a short-circuited and interrupted state and fails to work.
On the other hand, when the card reader is in a normal state, the self-detecting and dynamic displaying method of the present invention will cause display of the icons and different colors representing the card slots of the card reader on the screen, in the case of one reader for multiple slots. When one of the card slots has a flash memory card inserted therein, the detecting circuits will immediately detect the slot with the flash memory card as well as the format and type of the inserted flash memory card, and send back the detected state code to the control chip for retrieval and comparison by the computer later. After the state code is compared to data stored in an internal databank of the computer by the part of software in the computer, a predetermined corresponding icon or color will replace the icon or color originally displayed on the screen for representing the empty card slot, so that the user could clearly know in which slot a flash memory card is currently inserted and the type of the inserted flash memory card. And, the current state of the inserted flash memory card is also displayed using a specific icon or color. For example, a write-protection state, a damaged state, or a remained storage capacity of the flash memory card all can be displayed on the screen using different icons and colors, so that the user may immediately determine the working state of the flash memory card.
In the event the detecting circuits detect that the inserted flash memory card is reading/writing, the computer would also immediately show on the screen a specific dynamic icon to indicate the reading/writing state of the flash memory card, so that the user could clearly know the current reading/writing state to avoid pulling the flash memory card out of the card reader while the flash memory card is reading/writing, and thereby reduces the probability of damaging the flash memory card and/or the card reader. In this way, the most current state of a specific card slot or a flash memory card inserted therein can always be timely presented before the user.
The present invention has been described with a preferred embodiment thereof and it is understood that many changes and modifications in the described embodiment can be carried out without departing from the scope and the spirit of the invention that is intended to be limited only by the appended claims.
