CN1889090A

CN1889090A - Virtual USB interface card reader with high-speed peripheral parts interconnected bus

Info

Publication number: CN1889090A
Application number: CN 200510081057
Authority: CN
Inventors: 李建龙; 颜暐駩
Original assignee: Phison Electronics Corp
Current assignee: Phison Electronics Corp
Priority date: 2005-06-28
Filing date: 2005-06-28
Publication date: 2007-01-03
Anticipated expiration: 2025-06-28
Also published as: CN100397409C

Abstract

The invention is a dummy USB interface card reader with the PCI Express. The card reader has the microcontroller which is connected with the PCI Express interface and the memory card interface; it also has the memory card interface, the PCI Express interface and the dummy USB interface module which includes the dummy main control end and dummy device end. The storage or the read order informed from the host computer to the memory card is finished in the dummy USB interface module. The transferring speed can meet the speed provide by the PCI Express. The card reader can recognize the main control end as the USB interface device not the pure PCI Express device.

Description

The virtual USB interface card reader of tool high-speed peripheral parts interconnected bus

Technical field

The present invention is a kind of virtual USB interface card reader of tool high-speed peripheral parts interconnected bus, refers to utilize the virtual USB interface card reader of high-speed peripheral parts interconnected bus (PCI Express) as transmission interface especially.

Background technology

Computing machine science and technology is grown up with the speed of making rapid progress now, the development trend of its computing machine also reaches fireballing direction by force towards calculation function and strides forward, and because of the clock pulse of at present central processing unit (CPU) too fast, the transmission speed of other peripherals can't be caught up with the processing speed of central processing unit at all, therefore, even if the usefulness of central processing unit continues to promote, do not have too big improvement yet, this is because the usefulness of computing machine depends on total system, whole computer architecture must be done an improvement, could make the usefulness of central processing unit perform to best.

Yet, the speed of transmission data depends on the transmission speed of bus, in order to make the enhancing efficiency of computing machine, relevant dealer improves on the transmission speed of bus invariably, the transmission speed that for example connects the integrated driving electronic interface (IDE) of Winchester disk drive has reached 160MB/s, grid line rises to 1Gb/s by 10MB/s, the USB that the RS-232 of serial connection port more is transmitted speed 480MB/s replaces, and transfer rate is more brought up to 250MB/s with the transfer rate of its half-duplex channel up to 133MB/s PCI (peripheral component interconnect) bus (PCI) at present, become the high-speed peripheral parts interconnected bus (PCI Express) of a new generation, and this kind high-speed peripheral parts interconnected bus (PCIExpress) more provides the control function of supporting hot plug, so this high-speed peripheral parts interconnected bus (PCI Express) more can be accepted by the user.

Moreover, charming characteristics such as non-volatile, shatter-proof with low power consuming since flash memory comes out, high storage density, in many portable devices, gradually replace EEPROM or battery powered storer, more owing to present semiconductor technology progresses greatly day by day, the storage density of flash memory and transmission speed have the growth of advancing by leaps and bounds especially, so flash memory more can replace traditional Storage Medias such as hard drives in many application facet.The memory card that utilizes flash memory can be made at present comprises digital camera, PDA, mobile phone etc., and this electronic product has become the indispensable product of society, so the sales volume of memory card and kind are also more and more.And memory card utilizes USB or integrated driving electronic interface (IDE) as transmission interface mostly, and the transfer rate of USB and integrated driving electronic interface (IDE) has only 480MB/s and 160MB/s, and its transfer rate can't be caught up with the read or write speed of memory card.Therefore as using memory card, then can be limited, and can't reach itself best state by the USB of host side (Host) or integrated driving electronic interface (IDE).

In addition, in the system or software program of a program development, the capital provides certain several editor of combining, compiling, debug, file administration and is implemented as the environment interface of one, this environment interface can allow the programmer carry out the needed most of work of application program of exploitation, therefore, can do communication with particular environment interface and interface equipment at the software that host side is performed, so peripherals must possess the environment interface of host side, just can carry out the instruction of transmitting by host side.

From the above mentioned, how to make memory card have the transmission interface of USB, have transmission speed faster again simultaneously, be technical matters to be solved by this invention.

Summary of the invention

Fundamental purpose of the present invention is to provide a kind of virtual USB interface card reader of tool high-speed peripheral parts interconnected bus, this card reader is to utilize high-speed peripheral parts interconnected bus (PCIExpress) as the transmission interface between host side and the card reader, and card reader has the virtual USB module that can link up with host side, when making host side pass through the data of card reader access/memory card, can reach best transfer rate, also have USB interface characteristic simultaneously.

According to above-mentioned purpose, this card reader has microcontroller, and this microcontroller has memory card interface, high-speed peripheral parts interconnected bus interface and virtual USB module; This microcontroller is connected to the connection interface of the set high-speed peripheral parts interconnected bus of host side respectively, and is connected to memory card connection interface; When the memory card that host side reading card machine is connected is assigned the instruction that stores or read, this instruction can be sent to the virtual USB module, and finish instruction by the virtual USB module, and the data of the memory card that card reader connected can be according to instruction and by set memory card interface and high-speed peripheral parts interconnected bus (PCI Express) interface of microcontroller, data are converted to memory card or the receptible data layout of high-speed peripheral parts interconnected bus, reach host side or memory card again, make host side can assign the instruction of access data by virtual USB module reading card machine, and data can reach the transfer rate that high-speed peripheral parts interconnected bus provides when transmission, and make card reader can reach best transfer rate, and kept the speciality of USB interface.

For reaching above-mentioned purpose and effect, the technology used in the present invention means and structure thereof will illustrate its feature and function in detail by the following drawings and preferred embodiment of the present invention.

Description of drawings

Fig. 1 is the calcspar of preferred embodiment of the present invention.

Fig. 2 is the synoptic diagram of preferred embodiment of the present invention when transmitting data.

Symbol description among the figure:

1 card reader

11 high-speed peripheral parts interconnected bus connect interface

12 microcontrollers

121 memory card interfaces

122 high-speed peripheral parts interconnected bus interfaces

123 virtual USB interface modules

1231 USB interface main control end

1232 USB interfare device ends

13 memory cards connect interface

2 host side

21 high-speed peripheral parts interconnected bus

211 single channel passages

3 memory cards

Embodiment

See also shown in Figure 1ly, be the calcspar of preferred embodiment of the present invention, find out by knowing among the figure, card reader 1 of the present invention has high-speed peripheral parts interconnected bus (PCI Express) and connects interface 11, microcontroller 12 and memory card and connect interface 13; Wherein:

This high-speed peripheral parts interconnected bus (PCI Express) connects interface 11 for can be for being connected to the set high-speed peripheral parts interconnected bus (PCI Express) 21 of host side 2.

This microcontroller 12 has memory card interface 121, high-speed peripheral parts interconnected bus (PCIExpress) interface 122 and virtual USB interface module (USB Modu1e) 123, and virtual USB interface module 123 has USB interface main control end (USB Host) 1231 and USB interfare device end (USB Device) 1232, this microcontroller 12 is connected in high-speed peripheral parts interconnected bus (PCI Express) and connects interface 11, and virtual USB interface module 123 is not an entity, but is utilized a Dummy of software program simulation by the deviser.

This memory card connects interface 13 and is connected in microcontroller 12, and this memory card connects interface 13 other ends and connects for memory card 3.

When the set high-speed peripheral parts interconnected bus (PCI Express) of card reader 1 connects interface 11 and is connected to the set high-speed peripheral parts interconnected bus (PCI Express) of host side 2 21, the microcontroller 12 of this card reader 1 can be a USB interface host side to host side 1 declaration card reader 1, so, though host side 2 is come with high-speed peripheral parts interconnected bus (PCI Express) framework and microcontroller 12 is done communication, but can assert that microcontroller 12 is host side of a USB interface, and connect interface 13 when memory card 3 is connected to memory card, and when 2 pairs of memory cards 3 of host side are assigned save command, this instruction can be sent to the set USB interface main control end (USB Host) 1231 of virtual USB interface module (USB Module) 123 of microcontroller 12 earlier, and USB interface main control end (USB Host) 1231 can be sent to USB interfare device end (USB Device) 1232 with this instruction, and finish instruction by USB interfare device end (USB Device) 1232, at this moment, the data of host side 2 are sent to microcontroller 12 for connecting interface 11 by high-speed peripheral parts interconnected bus (PCIExpress) 21 and high-speed peripheral parts interconnected bus (PCI Express) earlier, and microcontroller 12 set memory card interfaces 121 can be converted to 3 receptible data layouts of memory card with these data, and are stored in the memory card 3.

Moreover, when host side 2 is desired to read data stored in the memory card 3, this USB interface instruction can be sent to the set USB interface main control end (USB Host) 1231 of virtual USB interface module (USB Module) 123 of microcontroller 12 earlier, and USB interface main control end (USBHost) 1231 can be sent to USB interfare device end (USB Device) 1232 with this instruction, and finish instruction by USB interfare device end (USB Device) 1232, at this moment, this memory card 3 can be sent to microcontroller 12 with data earlier, and microcontroller 12 set high-speed peripheral parts interconnected bus (PCI Express) interfaces 122 can be converted to 21 forms that can accept of high-speed peripheral parts interconnected bus (PCI Express) with these data, are sent to host side 2 by high-speed peripheral parts interconnected bus (PCI Express) connection interface 11 and high-speed peripheral parts interconnected bus (PCIExpress) 21 again.

From the above, when the memory card 3 that host side 2 reading card machines 1 are connected reads or stores, its data are directly to take out or write in memory card 3 by microcontroller 12, and the order of reading or storing is to be finished by virtual USB interface module (USB Module) 123 set USB interface main control end (USB Host) 1231 and USB interfare device ends (USB Device) 1232, therefore, host side 2 can assert that this card reader 1 is a virtual USB interface card reader with high-speed peripheral parts interconnected bus (PCI Express).

Again, this memory card interface 121 can be CF memory card interface, MS memory card interface, XD memory card interface, SM memory card interface, MMC memory card interface or SD memory card interface.

In addition, this memory card connection interface 13 can be one or more.

See also shown in Figure 2, be the synoptic diagram of preferred embodiment of the present invention when transmitting data, find out by knowing among the figure, host side 2 can be formed transmitting terminal (Tx) and receiving end (Rx) with card reader 1 by one group of single channel passage 211 at the physical layer of transmission data, and single channel passage 211 also can use a group or more.

The key that the virtual USB interface card reader of tool high-speed peripheral parts interconnected bus of the present invention can improve prior art is, the present invention adopts set USB interface main control end of card reader and USB interfare device to bring in and carries out the instruction that host side is assigned, and use high-speed peripheral parts interconnected bus (PCI Express) as the transmission interface between host side and the card reader, allow data when transmission, can reach the transfer rate that high-speed peripheral parts interconnected bus provides, and make card reader can reach best transfer rate.

Above-mentioned detailed description is at a kind of preferable possible embodiments explanation of the present invention, this embodiment is not in order to limit claim of the present invention, all other do not break away from the equalization finished under the disclosed skill spirit to be changed and modifies change, all should be contained in the claim that the present invention contains.

In sum, the virtual USB interface card reader of tool high-speed peripheral parts interconnected bus of the present invention has obvious effect when using promotes, and really meets the patent requirement of novelty, creativeness and practicality, files an application in accordance with the law.

Claims

1. the virtual USB interface card reader of a tool high-speed peripheral parts interconnected bus, this card reader have microcontroller, memory card connects interface and high-speed peripheral parts interconnected bus connects interface, it is characterized in that,

The virtual USB module that this microcontroller has memory card interface, the high-speed peripheral parts interconnected bus interface that data can be converted to memory card form or high-speed peripheral parts interconnected bus form and can receive the instruction that host side assigns;

This virtual USB interface module is provided with and can receives the USB interface main control end that host side is assigned the instruction of USB interface, and the USB interfare device end that can finish the instruction of USB interface;

This memory card connects interface and is connected in microcontroller, and this memory card connects the interface other end and is connected with memory card.

This high-speed peripheral parts interconnected bus connects interface for supplying to be connected to the set high-speed peripheral parts interconnected bus of host side, and high-speed peripheral parts interconnected bus connects interface and is connected in microcontroller, by this when host side when storing or reading memory card and connect the data of the memory card that interface connected, the microcontroller of this card reader can declare that card reader is a USB interface host side to host side, and the USB interface instruction that host side is assigned can be sent to the virtual USB interface module, and finish instruction by the virtual USB interface module, and the data of the memory card connection memory card that interface connected can be according to instruction and by set memory card interface and the high-speed peripheral parts interconnected bus interface of microcontroller, data are converted to memory card or the receptible data layout of high-speed peripheral parts interconnected bus, reach host side or memory card again and store.

2. the USB interface card reader of tool high-speed peripheral parts interconnected bus as claimed in claim 1 is characterized in that, this host side and storage device can be formed transmitting terminal and receiving end by one group of single channel passage at the physical layer of transmission data.

3. the USB interface card reader of tool high-speed peripheral parts interconnected bus as claimed in claim 2 is characterized in that, this single channel passage can be a group or more.

4. the USB interface card reader of tool high-speed peripheral parts interconnected bus as claimed in claim 1 is characterized in that, this memory card connects interface and can be one or more.

5. the USB interface card reader of tool high-speed peripheral parts interconnected bus as claimed in claim 1 is characterized in that this memory card interface can be the CF memory card interface.

6. the USB interface card reader of tool high-speed peripheral parts interconnected bus as claimed in claim 1 is characterized in that this memory card interface can be the MS memory card interface.

7. the USB interface card reader of tool high-speed peripheral parts interconnected bus as claimed in claim 1 is characterized in that, this memory card interface can be XD memory card interface or SM memory card interface.

8. the USB interface card reader of tool high-speed peripheral parts interconnected bus as claimed in claim 1 is characterized in that, this memory card interface can be SD memory card interface or MMC memory card interface.

9. the virtual USB interface flash storage device of tool high-speed peripheral parts interconnected bus as claimed in claim 1 is characterized in that, this virtual USB interface module is not an entity, but adopts a Dummy with the software program simulation.