CN202696643U - Highly reliable bridge with multiple serial ports - Google Patents
Highly reliable bridge with multiple serial ports Download PDFInfo
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- CN202696643U CN202696643U CN 201220399827 CN201220399827U CN202696643U CN 202696643 U CN202696643 U CN 202696643U CN 201220399827 CN201220399827 CN 201220399827 CN 201220399827 U CN201220399827 U CN 201220399827U CN 202696643 U CN202696643 U CN 202696643U
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Abstract
The utility model discloses a highly reliable bridge with multiple serial ports. The highly reliable bridge comprises a microprocessor MCU, and an Ethernet interface, a flash memory, a JTAG interface, a keyboard interface and a multiple serial port expansion circuit which are connected with the microprocessor MCU respectively, wherein eight serial ports are connected to the multiple serial port expansion circuit, a CPLD of the multiple serial port expansion circuit is connected with the microprocessor MCU, an OR-gate is connected between two integrated asynchronous communication components I6C554 and the CPLD, and each integrated asynchronous communication component I6C554 is connected with two RS232 level converters MAX 202. The highly reliable bridge with multiple serial ports can provide eight RS-232 serial ports, and the reliability of the bridge is high.
Description
Technical field
The utility model relates to a kind of bridge, is specifically related to the much higher serial ports bridge of a kind of reliability.
Background technology
Bridge (Bridge) gets up two similar network connections, and the circulation of network data is managed, and is the bridge that connects between a network and another network.Bridge is a kind of equipment that belongs to network layer, its effect is extended network and means of communication, at various transmission medium repeating data signals, the distance of extended network, simultaneously will there be selectively again the signal of address to send to another transmission medium from a transmission medium, and can effectively limits inessential communication in two medium systems.Bridge gets up two similar network connections, and the circulation of network data is managed.In the middle of the utilization of reality, the utilization of bridge is very general, it is when being applied to the various fields such as the management of Industrial Equipment Networking automation, access control and attendance, market marketing system networking automation, remote image transmission, not only require its serial ports quantity many, and its stability is had quite high requirement.
The utility model content
The utility model has overcome the deficiencies in the prior art, provide a kind of reliability much higher serial ports bridge, this bridge can provide 8 RS-232 serial ports, so that operate simultaneously 8 serial equipments, and these many serial expanded circuits utilize CPLD, solve the interruption overlap problem that produces when many serial ports are shared an interrupt source, improved its reliability.
For solving above-mentioned technical problem, the utility model by the following technical solutions:
The much higher serial ports bridge of a kind of reliability, it comprises Micro-processor MCV and the Ethernet interface that links to each other with Micro-processor MCV respectively, flash memory, jtag interface, keyboard interface, many serial expanded circuits; Be connected with 8 serial ports on described many serial expanded circuits, the CPLD of described many serial expanded circuits links to each other with Micro-processor MCV, be connected with between two integrated asynchronous communication element 16C554 and the CPLD one or, every integrated asynchronous communication element 16C554 is connected with two RS232 level translator MAX202.
Further technical scheme is:
Described two integrated asynchronous communication element 16C554 respectively with or the door A, B link to each other, CPLD with or link to each other.
Also be connected with crystal oscillating circuit and SDRAM memory on the described Micro-processor MCV.
Described serial port directly links to each other with RS232 level translator MAX202, and every RS232 level translator MAX202 connects the dual serial port.
Micro-processor MCV of the present utility model adopts S3C4510B processor, its low cost and high-performance; Ethernet interface forms ethernet interface circuit with the mac controller of a slice RTL8201 in the S3C4510B sheet; The FLASH memory adopts a slice 39VFl60, and being used for depositing needs the user data preserved etc. behind tested user application, the system power failure; S D R A M memory can satisfy embedded OS and the various relatively service requirement of complicated algorithm with two HY57V641620HG SDRAM accumulator system that makes up 32 in parallel; Crystal oscillating circuit is the microprocessor necessary part that works.
Many serial ports part, data signals of serial converts Transistor-Transistor Logic level to by MAX202, again by STl6C554 output interrupt requests.The interrupt requests of eight serial ports or get up to produce irq signal INTREQ links to each other with the interrupt control unit of CPU through CPLD again.
Compared with prior art, the beneficial effects of the utility model are:
1, the utility model provides 8 RS-232 serial ports, so that operate simultaneously 8 serial equipments, many operating on the equipment of equipment just can be realized.
2, many serial expanded circuits of the present utility model utilize CPLD, solve the interruption overlap problem that produces when many serial ports are shared an interrupt source, have improved its reliability.
3, the utility model is made simply, saves cost.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is hardware configuration schematic diagram of the present utility model.
Fig. 2 is many serial expanded circuits schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.Execution mode of the present utility model includes but not limited to the following example.
Embodiment
Such as the much higher serial ports bridge of a kind of reliability of Fig. 1, it comprises Micro-processor MCV and the Ethernet interface that links to each other with Micro-processor MCV respectively, flash memory, jtag interface, keyboard interface, many serial expanded circuits; Be connected with 8 serial ports on many serial expanded circuits, the CPLD of many serial expanded circuits links to each other with Micro-processor MCV, be connected with between two integrated asynchronous communication element 16C554 and the CPLD one or, every integrated asynchronous communication element 16C554 is connected with two RS232 level translator MAX202.Two integrated asynchronous communication element 16C554 respectively with or A, the B of door link to each other, CPLD with or link to each other.Also be connected with crystal oscillating circuit and SDRAM memory on the Micro-processor MCV.Serial port directly links to each other with RS232 level translator MAX202, and every RS232 level translator MAX202 connects the dual serial port.
The course of work of present embodiment is as follows:
Use part at many serial ports, data signals of serial converts Transistor-Transistor Logic level to by MAX202, again by STl6C554 output interrupt requests.The interrupt requests of eight serial ports or get up to produce irq signal INTREQ links to each other with the interrupt control unit of CPU through CPLD again.CPLD mainly is the interruption overlap problem that certainly leads to when many serial ports are shared an interrupt source in order to solve.For improving reliability, eight serial ports in the system all adopt interrupt mode to carry out data and process, and eight serial ports are shared an interrupt source.
According to the above embodiments, can well finish the utility model.
Be as mentioned above embodiment of the present utility model.The utility model is not limited to above-mentioned execution mode, and anyone should learn the structural change of making under enlightenment of the present utility model, every with the utlity model has identical or close technical scheme, all fall within the protection range of the present utility model.
Claims (4)
1. much higher serial ports bridge of reliability, it is characterized in that: it comprises Micro-processor MCV and the Ethernet interface that links to each other with Micro-processor MCV respectively, flash memory, jtag interface, keyboard interface, many serial expanded circuits; Be connected with 8 serial ports on described many serial expanded circuits, the CPLD of described many serial expanded circuits links to each other with Micro-processor MCV, be connected with between two integrated asynchronous communication element 16C554 and the CPLD one or, every integrated asynchronous communication element 16C554 is connected with two RS232 level translator MAX202.
2. the much higher serial ports bridge of reliability according to claim 1 is characterized in that: described two integrated asynchronous communication element 16C554 respectively with or A, the B of door link to each other, CPLD with or link to each other.
3. the much higher serial ports bridge of reliability according to claim 1 and 2 is characterized in that: also be connected with crystal oscillating circuit and SDRAM memory on the described Micro-processor MCV.
4. the much higher serial ports bridge of reliability according to claim 3, it is characterized in that: described serial port directly links to each other with RS232 level translator MAX202, and every RS232 level translator MAX202 connects the dual serial port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220399827 CN202696643U (en) | 2012-08-14 | 2012-08-14 | Highly reliable bridge with multiple serial ports |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220399827 CN202696643U (en) | 2012-08-14 | 2012-08-14 | Highly reliable bridge with multiple serial ports |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202696643U true CN202696643U (en) | 2013-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220399827 Expired - Fee Related CN202696643U (en) | 2012-08-14 | 2012-08-14 | Highly reliable bridge with multiple serial ports |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595607A (en) * | 2012-08-14 | 2014-02-19 | 成都思迈科技发展有限责任公司 | A multi-serial port network bridge with high reliability |
-
2012
- 2012-08-14 CN CN 201220399827 patent/CN202696643U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595607A (en) * | 2012-08-14 | 2014-02-19 | 成都思迈科技发展有限责任公司 | A multi-serial port network bridge with high reliability |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20130814 |