CN2629126Y - CPU interface switching device and tax control cash collecting machine using psz interface - Google Patents
CPU interface switching device and tax control cash collecting machine using psz interface Download PDFInfo
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- CN2629126Y CN2629126Y CN 03263968 CN03263968U CN2629126Y CN 2629126 Y CN2629126 Y CN 2629126Y CN 03263968 CN03263968 CN 03263968 CN 03263968 U CN03263968 U CN 03263968U CN 2629126 Y CN2629126 Y CN 2629126Y
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Abstract
The utility model relates to a CPU interface switching device and a tax controlled cash receipting machine using the PS2 interface, which comprise an auxiliary chip to switch between the PS2 interface protocol and the SPI interface protocol. The auxiliary chip is connected with the PS2 equipment via at least one PS2 interface, and is connected with the SPI interface of the tax controlled cash receipting machine CPU for communication via the PS2 bus. The utility model facilitates CPU programming and increases the efficiency of the operating system with high stability.
Description
Technical field
The utility model relates to a kind of cpu i/f conversion equipment, particularly relates to the improvement of the cpu interface circuit that uses PS2 interface mouse and keyboard
The utility model also relates to a kind of tax-control cash register that uses foregoing circuit simultaneously.
Background technology
As everyone knows, mouse and keyboard commonly used at present all are PS2 interface mouse and keyboard, the product of compatible PS2 interface protocol substitutes serial equipment gradually becomes cashing machine, standard external equipment interface that the POS machine is new, its advantage is can provide+the 5V power supply, is that scanner, external magnetic card read write line and password keypad can need not external power source and be directly connected on the main frame.But, be not possess the PS2 hardware protocol in CPU at present, that is to say that CPU can't directly manage the PS2 interfacing equipment.Prior art cooperates I/O mouth and exterior interrupt to realize by software (operating system) often, so just need take the time of CPU in a large number, and can not guarantee the operation of operating system real-time and effective, has therefore reduced the overall efficiency of tax-control cash register.Serial ports among the CPU is counted deficiency at present, but all has idle a plurality of spi bus interfaces.SPI, promptly synchronous peripheral interface is the three-way sync cap agreement that MOTOROLA company releases, and realizes that by serial data line (MISO, MOSI) and serial time clock line (SCK) data of chip chamber transmit, same spi bus can be managed a plurality of serial devices simultaneously.Therefore, use the PS2 interfacing equipment in tax-control cash register, during as mouse or keyboard, if by the identification of CPU software decode, will have a strong impact on CPU and operating system efficient, and mouse, keyboard are difficult to stable control.
Summary of the invention
The purpose of this utility model just is to provide a kind of cpu i/f conversion equipment, can realize the conversion between PS2 interface protocol and the SPI interface protocol after being applied in the tax-control cash register, concerning CPU, only need to use its existing spi bus interface to get final product, simple, stable to the management of PS2 equipment.
Another purpose of the present utility model is to provide a kind of tax-control cash register that uses above-mentioned cpu i/f conversion equipment, owing to utilize hardware circuit that the PS2 interface protocol is converted to the SPI interface protocol, stable more succinct to the management of PS2 equipment, so that operating system is controlled the PS2 plant efficiency is higher.
A kind of cpu i/f conversion equipment of the present utility model, wherein, this interface switching device comprises a companion chip, realizes the conversion by PS2 interface protocol and SPI interface protocol, this companion chip links to each other with PS2 equipment by at least one PS2 interface; Simultaneously, this companion chip is connected with the SPI interface communication of described tax-control cash register CPU by spi bus.
Described interface switching device wherein, also is provided with a bus buffer chip between described companion chip and the described CPU, realize the buffering to the spi bus data transmission.
Described interface switching device, wherein, described PS2 interface has two, is keyboard and mouse.
A kind of tax-control cash register that uses the PS2 interface, wherein, this tax-control cash register comprises a CPU and a cpu i/f change-over circuit, this interface conversion circuit comprises a companion chip, realization is by the conversion of PS2 interface protocol and SPI interface protocol, and this companion chip links to each other with PS2 equipment by at least one PS2 interface; Simultaneously, this companion chip is connected with the SPI interface communication of described CPU by spi bus.
Described tax-control cash register wherein, also is provided with a bus buffer chip between described companion chip and the described CPU, realize the buffering to described spi bus data transmission.
Described tax-control cash register is characterized in that, described PS2 interface has two, is keyboard and mouse.
A kind of cpu i/f conversion equipment that the utility model provides, owing to adopt the companion chip that is used to change that is provided with between PS2 interface and CPU, CPU is stable more, simple to the management of PS2 interfacing equipment.
And, a kind of tax-control cash register that uses the PS2 interface of the present utility model owing to adopt above-mentioned cpu i/f change-over circuit or transition card, make operating system to control efficient higher.
Brief Description Of Drawings
Below in conjunction with accompanying drawing,, will make the technical solution of the utility model and beneficial effect thereof apparent by detailed description to the utility model preferred embodiment.
In the accompanying drawing,
Fig. 1 is the circuit block diagram of cpu i/f conversion equipment of the present utility model;
Fig. 2 is the circuit theory diagrams of cpu i/f conversion equipment of the present utility model;
Fig. 3 is the structural principle block diagram of the tax-control cash register of use PS2 interface of the present utility model.
Embodiment
A kind of cpu i/f conversion equipment 100 of the present utility model, as Fig. 1, Fig. 2 and shown in Figure 3, comprise a companion chip 110 in its circuit, this companion chip 110 is realized the conversion of PS2 interface protocol and SPI interface protocol, the one side is connected with at least one PS2 interface 120, can connect control PS2 interfacing equipment by this PS2 interface 120, as keyboard, mouse etc.Its opposite side is connected with the CPU140 communication of tax-control cash register by spi bus 130, can control a plurality of PS2 interfacing equipments by this spi bus, as mouse, keyboard, scanner, external magnetic card read write line and password keypad etc., for controlling of CPU, especially when designing program, can realize management easily to the PS2 interfacing equipment.
Be preferably simultaneously, before described CPU, be provided with a bus buffer chip 150 on this spi bus, as shown in Figure 2, because two direction cushions, therefore two bus buffer chips 151 and 152 are arranged, realization is to the buffering of the data transmission stream of spi bus, to realize the smooth and easy quick of data transmission.Described PS2 interface 120 is at least two, comprising keyboard and mouse.So, the CPU of use the utility model product just can simplify the management to the PS2 interfacing equipment.
This kind cpu i/f change-over circuit of the present utility model can also be made forms such as interface conversion chip, and its circuit theory is same as described above, repeats no more.The convenience of interface conversion chip is the modularization processing, can directly insert circuit when producing tax-control cash register and other equipment thereof, reduces production procedure, convenient production.
A kind of tax-control cash register that uses the PS2 interface of the present utility model, as shown in Figure 3, it comprises a CPU140, and this CPU140 does not have the PS2 interface equally, it need adopt aforesaid interface switching device, and the hardware device of PS2 interface protocol is inserted among the described CPU140 by spi bus.Its improved circuit structure also repeats no more as mentioned above.
Because the interface conversion circuit that tax-control cash register of the present utility model adopts, be actually by hardware docking port agreement and change, concerning CPU, its management to the PS2 external unit is by SPI interface management mode is realized, need not to utilize in the CPU software decode or take exterior interrupt, improved the treatment effeciency of CPU, and convenient used above-mentioned PS2 interfacing equipment when CPU is programmed, made operating system efficient higher; And cost reduces.
Should be understood that; the foregoing description of the present utility model can not be used as the restriction of scope of patent protection of the present utility model; for those of ordinary skills; can make various possible changes or replacement according to the technical solution of the utility model, and all these changes or replacement all should belong to the protection domain of the utility model appended claim.
Claims (6)
1, a kind of cpu i/f conversion equipment is characterized in that, this interface switching device comprises a companion chip, realizes the conversion by PS2 interface protocol and SPI interface protocol;
This companion chip links to each other with the PS2 peripheral hardware by at least one PS2 interface;
Simultaneously, this companion chip is connected with the SPI interface communication of described CPU by spi bus.
2, interface switching device according to claim 1 is characterized in that, also is provided with a bus buffer chip between described companion chip and the described CPU, realizes the buffering to the spi bus data transmission.
3, interface switching device according to claim 2 is characterized in that, described PS2 interface has a plurality of.
4, a kind of tax-control cash register that uses the PS2 interface is characterized in that, this tax-control cash register comprises a CPU and a cpu i/f change-over circuit, and this interface conversion circuit comprises a companion chip, realizes the conversion by PS2 interface protocol and SPI interface protocol; And
This companion chip links to each other with the PS2 peripheral hardware by at least one PS2 interface;
Simultaneously, this companion chip is connected with the SPI interface communication of described CPU by spi bus.
5, tax-control cash register according to claim 4 is characterized in that, also is provided with a bus buffer chip between described companion chip and the described CPU, realizes the buffering to described spi bus data transmission.
6, tax-control cash register according to claim 5 is characterized in that, described PS2 interface has a plurality of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03263968 CN2629126Y (en) | 2003-05-27 | 2003-05-27 | CPU interface switching device and tax control cash collecting machine using psz interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03263968 CN2629126Y (en) | 2003-05-27 | 2003-05-27 | CPU interface switching device and tax control cash collecting machine using psz interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2629126Y true CN2629126Y (en) | 2004-07-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03263968 Expired - Lifetime CN2629126Y (en) | 2003-05-27 | 2003-05-27 | CPU interface switching device and tax control cash collecting machine using psz interface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2629126Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8274972B2 (en) | 2005-07-15 | 2012-09-25 | Samsung Electronics Co., Ltd. | Communication system with switchable connection |
-
2003
- 2003-05-27 CN CN 03263968 patent/CN2629126Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8274972B2 (en) | 2005-07-15 | 2012-09-25 | Samsung Electronics Co., Ltd. | Communication system with switchable connection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHAORI SCIENCE & TECHNOLOGY (SHENZHEN) CO., LTD. Free format text: FORMER NAME OR ADDRESS: SHENZHEN ZHAORI INFORMATION TECHNOLOGY CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 518040 Guangdong city of Shenzhen province Futian District Che Kung Temple Tairan Industrial Zone 213 building 6 floor C block Patentee after: Zhaori Science & Technology (Shenzhen) Co., Ltd. Address before: 518000 Guangdong city of Shenzhen province Futian District Che Kung Temple Tairan Industrial Zone Patentee before: Zhaori Information Technology Co., Ltd.,Shenzhen |
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| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN ZHAORI TECHNOLOGY CO., LTD. Free format text: FORMER NAME: ZHAORI SCIENCE + TECHNOLOGY (SHENZHEN) CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 518040 Guangdong city of Shenzhen province Futian District Che Kung Temple Tairan Industrial Zone 213 building 6 floor C block Patentee after: Shenzhen Sinosun Technology Co., Ltd. Address before: 518040 Guangdong city of Shenzhen province Futian District Che Kung Temple Tairan Industrial Zone 213 building 6 floor C block Patentee before: Sinosun Technology (Shenzhen) Co., Ltd. |
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| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130527 Granted publication date: 20040728 |