WO2008034284A1

WO2008034284A1 - Peripheral device extended by using general external memory card and data processing method thereof

Info

Publication number: WO2008034284A1
Application number: PCT/CN2006/002411
Authority: WO
Inventors: Shengke Xu; Peng Zhang; Xuhao Zhang; Kaian Li
Original assignee: Neobeyondvision Inc.
Priority date: 2006-09-14
Filing date: 2006-09-15
Publication date: 2008-03-27
Also published as: CN101145141A; CN100495376C

Abstract

A peripheral device extended by using a general external memory card, comprises a memory card bus controller(021,21) and a flash memory(022,22), wherein the peripheral device also comprises a programmable logic controller(03,3), a function module(04,4), and a custom interface bus. The memory card bus controller(021,21) is connected to the host machine(01,1) having a memory card interface. The flash memory(022,22) is connected to the memory card bus controller(021,21). The programmable logic controller(03,3) is connected to the memory card bus controller(021,21) and flash memory(022,22) respectively, and to the function module(04,4) through the custom interface bus. Thus, the peripheral device realize a new extended function, especially realize the extend function of the radiovision or RFID(radio frequency identify) being popular at present, wherein the usage of these new devices provides a easy and quick accessing way.

Description

Peripheral device extended by universal external memory card and data processing method thereof

The present invention relates to a computer technology, and more particularly to a peripheral device for external device function expansion using an external memory card and a data processing method thereof. Background technique

On the one hand, with the rapid development of the IT industry, the research and development of products that process various information on the mobile has become a hot trend. For the existing plug-in methods to expand external devices, it has always been considered by the industry. The most effective and promising feature expansion solution, but the expansion of existing external devices is usually extended by I/O, which limits the extensiveness of this expansion and the expansion space to a certain extent;

On the other hand, with the emergence of new technologies, such as entertainment-type wireless TV, fingerprint collection equipment for public security criminal investigation, RFID (radio frequency identification technology) technology for logistics information management, because it requires proprietary equipment. As a basis for use, this brings great inconvenience to users. If you want to use wireless TV, you can only buy equipment for receiving special wireless TV. If you want to collect fingerprints, you need to use a dedicated fingerprint collection device. To a certain extent, it causes repeated waste of resources. Therefore, the method for extending the functional device is urgently needed to expand the device according to a communication protocol. Therefore, the creators of the present invention have finally made breakthroughs through long-term research and development. . Summary of the invention

It is an object of the present invention to provide a peripheral device and a data processing method thereof that are extended by a universal external memory card, and realize a new function expansion by using a standard external interface device, in particular, a popular wireless TV or RFID. The functionality of (Radio Frequency Identification) is extended, and the use of these new types of devices provides a convenient and fast access path.

In order to achieve the above object, the technical solution adopted by the present invention is to provide a peripheral device extended by a universal external memory card, comprising: a memory card bus controller and a flash memory, wherein: the program further includes: a programmable logic control, a function Modules and custom interface buses, where

The memory card bus controller is connected to a host having a memory card interface;

The flash memory is connected to a memory card bus controller;

The programmable logic control is respectively connected to the memory card bus controller and the flash memory, and Connected to the functional module via the custom interface bus;

The memory card bus controller, the flash memory, and the programmable logic control constitute an external extension base, and the function module is connected to the external extension base;

The memory card bus controller is a USB controller, an SD memory card controller, an MMC controller; the host machine is a mobile phone, a personal digital assistant, a single chip microcomputer or a notebook computer;

The function module is a fingerprint collector, a wireless television receiver or a radio frequency identification card reader; the custom interface bus is a static memory storage bus structure. A data processing method for a peripheral device extended by a general-purpose external memory card is also provided, which is applied to the peripheral device of the universal external memory card expansion, wherein the steps included are:

Step a: General-purpose external memory card expansion system program initialization on the peripheral device;

Step b: Perform a write operation to the general external memory card expansion peripheral device;

Step c: The peripheral device of the general external memory card expansion is in a state of waiting for an operation command, and the driver on the host having the memory card interface issues an operation instruction;

Step d: The programmable logic device determines the bus operation type. If it is a write operation type, perform the following steps e; if it is a read operation type, perform the following steps f;

Step e: The programmable logic device implements driving of the custom data bus, drives the data signal on the flash memory bus to the custom bus, executes the general external memory card to extend the write operation of the peripheral device, and returns to the above step c after the operation is completed. ;

Step f: The programmable logic device implements driving of the flash memory bus, drives the data signal on the custom data bus to the flash memory bus, executes a general external memory card to expand the read operation of the peripheral device, and returns to the above step c after the operation is completed. ;

The universal external memory card extends the write operation of the peripheral device, and the steps included are:

Step el: Start the general external memory card to expand the peripheral device write operation;

Step e2: Dynamic address mapping by the memory card bus controller;

Step e3: The programmable logic device determines whether the feature data is included, if the following step e4 is performed, if the following step e5 is not included;

Step e4: The programmable logic device records the current physical address, and writes the data following the feature data into the function ¹ module;

Step e5: writing data to the flash memory; Step e6: The write operation of the general external memory card expansion peripheral device ends;

The feature data refers to byte data used to mark the operation of the function module; thereafter, the control word to be written into the function module or the data to be transmitted; if the byte data does not contain the feature data, Write to the file for the file system, directly respond to the write operation by the flash memory;

The current physical address recorded by the programmable logic device also dynamically changes with the mapping relationship, so that the accessed logical space corresponds to the functional module;

The general external memory card expands the read operation of the peripheral device, and the steps included are: step fl: starting a read operation of the universal external memory card expansion peripheral device;

Step Ω: Dynamic address mapping by the memory card bus controller;

Step β: The programmable logic device determines whether the current physical address is the same. If the following step f4 is performed consistently, if the inconsistency is performed, the following step f5 is performed;

Step f4: output data by the function module, perform the following step f6;

Step f5: outputting data from the flash memory, performing the following step f6;

Step f6: The read operation of the universal external memory card expansion peripheral device ends;

The programmable logic device determines whether the current physical address is the same, which means comparing the currently accessed physical address, whether the address recorded in step e4 is the same;

The dynamic address mapping is performed by the memory card bus controller, i.e., the logical address of the data block in the operating system on the host having the memory card interface and the physical address in the flash memory have a dynamic mapping relationship. DRAWINGS

1 is a schematic structural diagram of a peripheral device extended by a general-purpose external memory card according to the present invention; FIG. 2 is a schematic structural view of a preferred embodiment of a peripheral device extended by a general-purpose external memory card according to the present invention;

3 is a flow chart showing a data processing method of a preferred embodiment of a peripheral device extended by a general-purpose external memory card according to the present invention;

4 is a flow chart showing a write operation process in the data processing method of the preferred embodiment of the peripheral device extended by the general external memory card of the present invention;

Figure 5 is a flow chart showing the read operation process in the data processing method of the preferred embodiment of the peripheral device extended by the general external memory card of the present invention. DESCRIPTION OF REFERENCE NUMERALS 01 - host machine; 02 - device extension base; 021 - memory card bus controller; 022, 22 - flash memory; 03, 3 - programmable logic device; 04 - function module; 05 - custom interface Bus; 1 - personal digital assistant; 2- radio frequency identification card reader extension base; 2] - SD memory card controller; 4 radio frequency identification card reader; 5 - static memory data bus. detailed description

The above and other technical features and advantages of the present invention are described in more detail below with reference to the accompanying drawings. Please refer to FIG. 1 , which is a schematic structural diagram of a peripheral device extended by a general-purpose external memory card according to the present invention, which includes: a memory card bus controller 021 and a flash memory (flash memory) 022 , wherein: Programming logic control 03, function module 04, and custom interface bus 05, wherein the memory card bus controller 021 is connected to a host 01 having a memory card interface; the flash memory 022 and a memory card bus controller Connected to 021;

The programmable logic control 03 is respectively connected to the memory card bus controller 021 and the flash memory 022, and is connected to the function module 04 through the custom interface bus 05.

The memory card bus controller 021, the flash memory 022, and the programmable logic control 03 constitute an external extension base 02, and the function module 04 is connected to the external extension base 02.

The memory card bus controller 021 can be a USB controller, an SD card controller, an MMC controller, or the like.

The host machine 01 can be a processor device having a corresponding memory card insertion slot, such as a mobile phone, a personal digital assistant, a single chip microcomputer or a notebook computer.

The function module 04 can be a fingerprint collector, a wireless television receiver or a radio frequency identification card reader.

The custom interface bus 05 can be a SRAM (static memory) memory bus structure. Please refer to FIG. 2, which is a schematic structural diagram of a preferred embodiment of a peripheral device extended by a universal external memory card according to the present invention; substantially, the present figure is a portable radio frequency identification card reader combined with a personal digital assistant of the present invention. Schematic diagram of the structure, here the host machine 01 is the personal digital assistant 1, the memory card bus controller 021 is the SD card controller 21, the function module 04 is the radio frequency identification card reader 4, and the custom interface bus 05 is the SRAM storage bus. 5 structure to implement a portable RFID reader for processing information on a mobile RFID tag-attached item.

Usually connected to the SD slot on the personal digital assistant 1 SD memory card including a secure digital memory card The SD card controller 2 and the flash memory 22 form an integrated solid medium without any moving parts, so there is no need to worry about mechanical movement damage. Most of the current personal digital assistants 1 have an SD memory card slot for plugging SD. a memory card, the SD card controller 21 performs mutual authentication between the SD memory card and the personal digital assistant incorporating the memory card, parses the command of the SD interface, and controls the operation of the flash memory 22; it has hardware data write protection The protection switch prevents the risk of accidental deletion of stored contents.

The programmable logic device 3 is connected to and control an RFID reader 4 through the SRAM storage bus 5; in the present configuration, the SD card controller 21 is used to parse the command of the SD card interface on the PDA 1, and control the operation of the flash memory 22, There are many types of operations. To extend an external device, you only need to interpret two of them. The read command word is (00, 05) and the command word is 0, 85). For other operation types, the SD card controller 21 can directly control the flash memory 22 without interference.

The flash memory 22 is used to store data information or other data in the radio frequency identification tag, and the other data is some files in the personal digital assistant.

The programmable logic device 3 parses the command issued by the SD card controller 21, and decomposes the command into the operation of the file system to the flash memory 22, or the operation of the driver on the personal digital assistant to the RFID reader 4. The loading of the control signal to the flash memory 22 or the RFID reader 4 is completed to implement the command response of the two to the SD card controller 21.

The RFID reader 4 is a prior art product.

Please refer to FIG. 3, which is a flowchart of a data processing method of a preferred embodiment of a peripheral device extended by a general-purpose external memory card according to the present invention, which includes the following steps:

Step a: Initializing the system program of the portable RFID reader;

Step b: performing a write operation on the portable RFID reader;

Step c: The portable radio frequency identification card reader is in a state of waiting for an operation command, and the driver system on the personal digital assistant 1 issues an operation instruction;

Step d: The programmable logic device 3 determines the bus operation type, is a write operation type, performs step e, and if it is a read operation type, performs the following steps f;

Step e: The programmable logic device 3 implements driving of the SRAM memory bus 5, drives the data signal on the flash memory 22 bus to the SRAM storage bus 5, performs a write operation of the portable radio frequency identification card reader, and returns to the above steps after the operation is completed. c;

Step f: The programmable logic device 3 implements driving of the flash memory 22 bus, drives the data signal on the SRAM memory bus 5 to the flash memory 22 bus, and performs a portable radio frequency identification card reading. Read operation of the device, the operation is completed and returns to step 0 above.

4 is a flowchart of a write operation process in a data processing method of a preferred embodiment of a peripheral device extended by a general-purpose external memory card according to the present invention. The write operation refers to an operation command of the personal digital assistant 1 operating system or The other data to be transmitted is written into the portable RFID reader, and the steps included are: Step el: Start the writing operation of the portable RFID reader on the personal digital assistant 1; Step e2: By the SD card controller 21 for dynamic address mapping;

Step e3: The programmable logic device 3 determines whether the feature data is included, if the following step e4 is performed, if the following step e5 is not included;

Step e4: Record the current physical address, and write the data behind the feature data to the RFID reader.

4;

Step e5: writing data to the flash memory 22;

Step e6: The write operation of the portable RFID reader ends.

The startup write operation refers to checking that the command word is 80 or 85, and the SD card controller 21 performs address mapping. In the present invention, the SD card controller 21 has the function of address mapping, that is, the data block is operated by the personal digital assistant 1. The logical address in the system has a dynamic mapping relationship with the physical address in the flash memory 22, and the mapping relationship is invisible to the operating system on the personal digital assistant 1;

The programmable logic device 3 checks the written data. When the data is found to have the characteristic data, the current physical address of the bar is recorded to B0 as the physical address corresponding to the RFID reader 4, and the data behind it is written. The RFID reader 4; if there is no feature part, it is considered to operate on the file system, not the write operation to the RFID reader, and the write operation is ended, and for the personal digital assistant 1 itself, The write operation will be performed by the flash memory 22; when the set identification data is sufficiently complicated, the possibility of marking the byte data of the RFID reader 4 and the data conflict in the file system is as small as negligible.

5 is a flowchart of a read operation process in a data processing method of a preferred embodiment of a peripheral device extended by a general-purpose external memory card according to the present invention. The data transmission is real-time, and the steps included are: step fl : Personal Digital Assistant 1 initiates reading of a portable RFID reader;

Step Ω: Dynamic address mapping by the SD card controller 21;

Step β. Programmable logic device 3 determines whether the physical address is the same, if the following step f4 is performed consistently, if the inconsistency is performed, the following step f5;

Step f4: outputting data by the radio frequency identification card reader 4, performing the following step f6; Step f5: outputting data from the flash memory 22, performing the following step f6;

Step f6: The read operation ends.

The startup read operation refers to that the data obtained by the radio frequency identification card reader 4 is outputted by the personal digital assistant 1 operating system to the personal digital assistant 1SD card controller 21, and compares the physical location of the current access with the address of the B0 record. If they are equal, if the address comparison is equal, the radio frequency identification card reader 4 outputs the data information in the collected radio frequency identification tag; if the address comparisons are not equal, the flash memory 22 outputs the data.

What needs to be emphasized is:

When the system described in Figure 3 is initialized, address B0 is an invalid address, so only b write operations are performed.

Although the SD card controller 21 has a dynamic address mapping relationship, as long as the operation of writing a command to the flash memory 22 each time has identification data, the physical address recorded by the programmable logic device 3 also dynamically changes with the mapping relationship. It is also always possible to ensure that the logical space of the access corresponds to the RFID reader 4.

As shown in FIG. 4 and FIG. 5, assuming that the system detects the feature data, for the write operation to the address p, the record B0=address p, and the criterion for determining the radio frequency identification card reader 4 in the subsequent read operation is to determine whether the address and the address are p is equal; any reading of the address p is output by the radio frequency identification card reader 4; the system detects the write operation of the feature data again to the address q, then records B0 = address q, then judges the radio frequency identification card reading The standard of the device 4 becomes whether the address is equal to the address q; if the reading of the address q is output by the RFID reader 4, the reading of the original address p is sent to the flash memory 22 to output the data.

The present invention does not abandon the space in which the flash memory 22 is used, and still uses the file system of the personal digital assistant 1 operating system to perform the storage space file operation of the flash memory 22. In order to avoid conflicts between the personal digital assistant 1 file system and the radio frequency identification card reader 4, files are not used to save the data identification, and operations such as file copying are prevented from causing malfunction to the radio frequency identification card reader 4.

The present invention extends the external RFID reader 4 by utilizing unused storage space in the storage space of the secure digital memory card defined by the file system. The specific method is as follows:

Some of the storage space of the flash memory 22 is not used, and is called a remaining space in the file system. For example, in the file allocation table 16 (fatl 6), about 3,000 remaining sectors (Sector) of the 256M flash memory 22 belong to the remaining space; other file systems also have unequal remaining space. Using the remaining space that is invisible to these file systems to enable access to RFID readers ask.

When accessing the RFID reader 4, the portion of the data in front of the sector data is filled with the feature data, and the latter portion is filled with the data to be actually written. Data can be written to the RFID reader 4 using the address mapping method described above.

Because the address mapping relationship is established. When reading these logical blocks, the programmable logic device 3 can know to read the data of the RFID reader 4. These unused areas, the personal digital assistant operating system, are not used, so that the external device and the file system exist at the same time, and share the same storage space.

As long as the corresponding bus controller is replaced, an expansion scheme on different memory cards can be realized; the flash memory is a standard memory, that is, an external device can be extended to a host having a USB interface by using a USB controller. The data processing method is the same as that of the extended portable RFID reader through the SD interface of the personal digital assistant. The extension of the MMC interface is the same, and will not be described here.

The above are only the preferred embodiments of the present invention, and are merely illustrative and not restrictive. It will be apparent to those skilled in the art that many changes, modifications, and equivalents are possible within the spirit and scope of the invention as defined by the appended claims.

Claims

Rights request

A peripheral device that is extended by a general-purpose external memory card, comprising: a memory card bus controller and a flash memory, and further comprising: a programmable logic control, a function module, and a custom interface bus, wherein

The flash memory is connected to a memory card bus controller;

The programmable logic control is respectively connected to the memory card bus controller and the flash memory, and is connected to the function module through the customized interface bus.

2. The peripheral device extended by a universal external memory card according to claim 1, wherein the memory card bus controller, the flash memory, and the programmable logic control constitute an external extension base, and the functional module is Connected to the external extension base as described.

The peripheral device expanded by the universal external memory card according to claim 1 or 2, wherein the memory card bus controller is a USB controller, an SD memory card controller, and an MMC controller.

The peripheral device expanded by the universal external memory card according to claim 1 or 2, wherein the host device is a mobile phone, a personal digital assistant, a single chip microcomputer or a notebook computer.

The peripheral device extended by the universal external memory card according to claim 1 or 2, wherein the function module is a fingerprint collector, a wireless television receiver or a radio frequency identification card reader.

6. The peripheral device expanded by a universal external memory card according to claim 1, wherein said custom interface bus is a static memory storage bus structure.

A data processing method for a peripheral device extended by a general-purpose external memory card, which is applied to the peripheral device of the general-purpose external memory card expansion of the present invention, characterized in that the steps included are:

Step e: The programmable logic device drives the custom data bus, drives the data signal on the flash memory bus to the custom bus, and executes a general external memory card to extend the write operation of the peripheral device. The operation is completed and returns to the above step c; . Step f: The programmable logic device implements driving of the flash memory bus, drives the data signal on the custom data bus to the flash memory bus, and executes the general external memory card to expand the reading of the peripheral device. Operation, operation is completed, return to the above steps

8. The data processing method of a peripheral device for expanding a peripheral device by using a general-purpose external memory card according to claim 7, wherein said universal external memory card extends a write operation of the peripheral device, and comprises the steps of: : Start general-purpose external memory card expansion peripheral device write operation;

Step e2: Dynamic address mapping by the memory card bus controller;

Step e4: The programmable logic device records the current physical address, and writes the data following the feature data to the function module;

Step e5: Write data to the flash memory;

Step e6: The write operation of the general-purpose external memory card expansion peripheral device ends.

The data processing method for expanding a peripheral device by using a general-purpose external memory card according to claim 8, wherein the feature data is used to mark byte data for operating the function module; The control word to be written to the function module or the data to be transmitted; if the byte data does not contain the feature data, the file system writes the file directly, and the write operation is directly responded to by the flash memory.

10. The data processing method of a peripheral device for expanding a peripheral device by using a general-purpose external memory card according to claim 8, wherein the current physical address recorded by the programmable logic device also dynamically changes with a mapping relationship to enable access. The logical space corresponds to the functional module.

A data processing method for expanding a peripheral device by using a general-purpose external memory card according to claim 7, wherein said universal external memory card expands a read operation of the peripheral device, and the steps included are:

Step fl: Start a read operation of the universal external memory card expansion peripheral device;

Step Ω: Dynamic address mapping by the memory card bus controller;

Step f3: The programmable logic device determines whether the current physical address is the same. If the following step f4 is performed consistently, if the inconsistency is performed, the following step f5 is performed;

Step f4: The data is output by the function module, and the following step f6 is performed;

Step f5: outputting data from the flash memory, performing the following step f6; Step f6: The read operation of the general-purpose external memory card expansion peripheral device ends.

The data processing method for extending a peripheral device by using a general-purpose external memory card according to claim 11, wherein the programmable logic device determines whether the current physical address is the same, and refers to comparing the currently accessed physical address. Whether the address recorded for step e4 is the same.

The data processing method for expanding a peripheral device by using a general-purpose external memory card according to claim 8 or 11, wherein said dynamic address mapping is performed by a memory card bus controller, that is, the data block has a memory card The logical address in the operating system on the host of the interface and the physical address in the flash memory have a dynamic mapping relationship.