CN201716680U - USB composite device for composite keyboard and fingerprint reader - Google Patents

Abstract

The utility model relates to a USB composite device used for a composite keyboard and a fingerprint reader. The USB composite device is characterized in that the USB composite device comprises a USB physical interface module, a USB serial data engine module, an interrupt end point, a bulk transfer end point and a USB controller; the interrupt end point is used for caching the key information between the interrupt end point and the composite keyboard; the bulk transfer end point is used for caching the data transmitted between the bulk transfer end point and the fingerprint reader; one end of the USB controller is connected to the USB serial data engine module, and the other end of the USB controller is respectively connected with the interrupt end point and the bulk transfer end point; the data packet is unpacked, if the USB address in the data packet conforms to that of the device, the data packet is accepted; or the data from the interrupt end point or the bulk transfer end point is integrated into a data packet with the USB address of the device and the corresponding endpoint address. The USB composite device achieves the purpose that various USB devices share one USB controller.

Description

The USB equipment complex of a kind of composite keyboard and Fingerprint Identification Unit

Technical field

The utility model relates to the USB equipment complex of a kind of composite keyboard and Fingerprint Identification Unit, belongs to integrated circuit fields.

Background technology

Increase fingerprint identification device if desired on the present USB Multi-Function Keyboard, generally all need 3 chips, a USB Multi-Function Keyboard control chip, a USB fingerprint identification device chip and a USBHUB control chip.The function of MultiMedia Keyboard and fingerprint identification device is finished by control chip separately, USB HUB chip is responsible for the two is combined, two interfaces that are about to USB MultiMedia Keyboard and USB fingerprint identification device are combined into an interface, and we claim that this implementation method is " three chips " scheme.

Three chip solution have the following disadvantages: the chip of use many (3), and the cost of products height, system's line complexity influences system performance, compatible bad control or the like, and cost height, integrated level is low then to be topmost shortcoming.

So " three chips " system architecture is too complicated, uses inconvenience, core number causes the expensive height of power consumption to be unfavorable for marketing more.

Summary of the invention

The utility model purpose provides the USB equipment complex of a kind of composite keyboard and Fingerprint Identification Unit, and this equipment complex has been realized the shared USB controller of polytype USB device.

For achieving the above object, the technical solution adopted in the utility model is: the USB equipment complex of a kind of composite keyboard and Fingerprint Identification Unit is characterized in that:

Comprise:

The USB physical interface module is used for the conversion between USB cable information and the serial data packet;

USB serial data engine modules is used for the conversion between serial data packet and the parallel data bag;

The control end points is connected to described USB serial data engine modules, is used to receive from the solicited message of main frame and the descriptor of feedback device;

Interrupt endpoint is used for the key information between buffer memory and the described composite keyboard, and end-point addresses in the described packet is met in the bag of interrupt endpoint address deposit data in this interrupt endpoint buffer zone;

Piece transmission (Bulk) end points is used for the data transmitted between buffer memory and the described Fingerprint Identification Unit, and block address in the described packet is met in the bag of piece transmission (Bulk) end-point addresses deposit data in this piece transmits (Bulk) end points buffer zone;

USB controller, an end are connected to described USB serial data engine modules, and the other end is connected with piece transmission (Bulk) end points with described interrupt endpoint respectively; Packet is unpacked,, then accept this packet if the USB address conforms to the USB address of equipment in this packet; Perhaps, will be integrated into packet from the data of interrupt endpoint or piece transmission (Bulk) end points and the USB address and the corresponding end-point addresses of described equipment;

The SPI interface is used for the data transmission of fingerprint;

Fingerprint Identification Unit is used to accept the data of fingerprint;

Keyboard matrix is used to accept key information;

Data processing module, an end is connected with piece transmission (Bulk) end points with interrupt endpoint, and the other end is connected with keyboard matrix with the SPI interface, is used for the transfer of data.

Because the technique scheme utilization, the beneficial effects of the utility model are:

The advantage of the utility model patent has been to realize shared PHY of the USB device of multiple job category and SIE, rather than use a USB Hub that a plurality of equipment are carried out cascade, saved hardware resource, and Host is slow unlike using Hub to the access time of each equipment, has reached same USB transmission performance requirement.

Description of drawings

Accompanying drawing 1 is the utility model structural representation.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described:

Embodiment: the USB equipment complex of a kind of composite keyboard and Fingerprint Identification Unit,

Comprise:

USB physical interface module (PHY) is used for the conversion between USB cable information and the serial data packet;

USB serial data engine modules (SIE) is used for the conversion between serial data packet and the parallel data bag;

The control end points is connected to described USB serial data engine modules (SIE), is used to receive from the solicited message of main frame and the descriptor of feedback device;

Interrupt endpoint is used for the key information between buffer memory and the described composite keyboard, and end-point addresses in the described packet is met in the bag of interrupt endpoint address deposit data in this interrupt endpoint buffer zone;

Piece transmission (Bulk) end points is used for the data transmitted between buffer memory and the described Fingerprint Identification Unit, and block address in the described packet is met in the bag of piece transmission (Bulk) end-point addresses deposit data in this piece transmits (Bulk) end points buffer zone;

USB controller, an end are connected to described USB serial data engine modules (SIE), and the other end is connected with piece transmission (Bulk) end points with described interrupt endpoint respectively; Packet is unpacked,, then accept this packet if the USB address conforms to the USB address of equipment in this packet; Perhaps, will from the data of interrupt endpoint or piece transmission (Bulk) end points and the USB address of described equipment and accordingly end-point addresses be integrated into packet and transmit to main frame;

The SPI interface is used for the data transmission of fingerprint;

Fingerprint Identification Unit is used to accept the data of fingerprint;

Keyboard matrix is used to accept key information;

Data processing module, an end is connected with piece transmission (Bulk) end points with interrupt endpoint, and the other end is connected with keyboard matrix with the SPI interface, is used for the transfer of data.

Present embodiment foregoing specific explanations is as follows.

The USB equipment complex has 2 interface types, and each interface type can be finished a kind of function separately.For example, the USB MultiMedia Keyboard, it is a USB device, and it also has only an interface type simultaneously, i.e. and device type (HID) is learned in human body input, and the type adopts the interrupt endpoint transmission mode; The USB fingerprint identification device also is a USB device, it also has only an interface type, difference according to scheme has the different different device types that has, that this example is used is mass storage class type (Mass Storage), this is because the user presses the finger print data that produces behind the fingerprint sensor and need be transferred to main frame (PC) at short notice, and data volume is very big, and USB mass storage class type is just in order to satisfy the agreement of such transmission appointment, the type employing piece transmission (Bulk) endpoint transmission mode.Usb protocol has defined a variety of interface types, has comprised the USB MultiMedia Keyboard, the USB camera, and the USB printer, USB flash drive, USB monitor or the like possesses the USB device of two or more interface types, is called the USB equipment complex.Said method is about to USB MultiMedia Keyboard and two kinds of interface types of USB fingerprint identification device and is integrated in the equipment, has replaced existing " three chips " scheme.

The USB equipment complex that USB MultiMedia Keyboard and USB fingerprint identification device are integrated, be provided with chip piece, comprise PHY (USB physical interface module) and SIE (USB serial data engine modules), the control end points and CPU and the steering logic that are used for data flow path are used for data stream USB interrupt endpoint and Bulk end points together.

Described PHY is used to accept the serial data that the USB cable sends, and described SIE is used for serial data is converted to parallel data.

Just have two kinds of data in the present embodiment on PHY and the SIE, interrupt endpoint is used to accept the data of keyboard, the keyboard data of this button is placed on interrupt endpoint and waits for that main frame regularly obtains, the Bulk end points is used to send the data of USB fingerprint identification device, also accept simultaneously the instruction and data that is used to dispose Fingerprint Identification Unit, promptly with two kinds of data separately in present embodiment inside from main frame; Described CPU is used for the distribution and the coordination of data, is specially a plurality of end points that mainly utilize USB device, mails to interrupt endpoint from the data of keyboard matrix, mails to the Bulk end points from the instruction and data of main frame with from the data of Fingerprint Identification Unit; Described control end points, when USB device is enumerated, the total several end points of notice main frame current device type and equipment, the type of each end points, and enumerate the specific information that has comprised MultiMedia Keyboard equipment and fingerprint identification device in the data and be used for main frame identification interrupt endpoint and Bulk end points.

The foregoing description only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection domain of the present utility model with this.All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection domain of the present utility model.

Claims (1)

1. the USB equipment complex of composite keyboard and Fingerprint Identification Unit is characterized in that:

Comprise:

The USB physical interface module is used for the conversion between USB cable information and the serial data packet;

USB serial data engine modules is used for the conversion between serial data packet and the parallel data bag;

The control end points is connected to described USB serial data engine modules, is used to receive from the solicited message of main frame and the descriptor of feedback device;

Interrupt endpoint is used for the key information between buffer memory and the described composite keyboard, and end-point addresses in the described packet is met in the bag of interrupt endpoint address deposit data in this interrupt endpoint buffer zone;

Piece transmission (Bulk) end points is used for the data transmitted between buffer memory and the described Fingerprint Identification Unit, and block address in the described packet is met in the bag of piece transmission (Bulk) end-point addresses deposit data in this piece transmits (Bulk) end points buffer zone;

USB controller, an end are connected to described USB serial data engine modules, and the other end is connected with piece transmission (Bulk) end points with described interrupt endpoint respectively; Packet is unpacked,, then accept this packet if the USB address conforms to the USB address of equipment in this packet; Perhaps, will be integrated into packet from the data of interrupt endpoint or piece transmission (Bulk) end points and the USB address and the corresponding end-point addresses of described equipment;

The SPI interface is used for the data transmission of fingerprint;

Fingerprint Identification Unit is used to accept the data of fingerprint;

Keyboard matrix is used to accept key information;

Data processing module, an end is connected with piece transmission (Bulk) end points with interrupt endpoint, and the other end is connected with keyboard matrix with the SPI interface, is used for the transfer of data.

Images