CN204178365U

CN204178365U - Transformational structure between LBE bus and isa bus

Info

Publication number: CN204178365U
Application number: CN201420632480.9U
Authority: CN
Inventors: 亢振东; 张凯; 宁立革
Original assignee: Tianjin Embedtec Co Ltd
Current assignee: Tianjin Embedtec Co Ltd
Priority date: 2014-10-29
Filing date: 2014-10-29
Publication date: 2015-02-25
Anticipated expiration: 2024-10-29

Abstract

A transformational structure between LBE bus of the present utility model and isa bus, comprising: LBE bus host board slot, programmable logic device (PLD) and isa bus equipment slots, and wherein LBE bus host board slot, programmable logic device (PLD) are connected successively with isa bus equipment slots.In transformational structure between LBE bus of the present utility model and isa bus, LBE bus, to the protocol conversion of isa bus circuit, has been come by programmable logic device (PLD), flexible in programming, extensibility is strong, this circuit to have structure simple, reliable operation, the features such as applicability is strong and easy to operate.

Description

Transformational structure between LBE bus and isa bus

Technical field

The utility model relates to the technical field of Data Transmission Controlling, is the transformational structure between a kind of LBE bus and isa bus specifically.

Background technology

Isa bus is as a kind of general bus interface standards, and it obtains application widely in current computing machine.LBE bus is widely used in airborne embedded computer system.Two kinds of bus boards can be applied in computing machine, but due to the difference of bus protocol, under isa bus board cannot be applied to LBE bus environment, so just have certain limitation, cause the board of two kinds of different bus interfaces to use widely.And the device that carried out by two kinds of interfaces changing and technical scheme are not proposed in prior art yet, a kind of board can only correspond to a kind of bus interface, then cannot use for different interface bus.

Utility model content

The technical problems to be solved in the utility model is to provide the transformational structure between a kind of LBE bus and isa bus.

The technical scheme that the utility model is taked for the technical matters existed in solution known technology is:

Transformational structure between LBE bus of the present utility model and isa bus, comprising: LBE bus host board slot, programmable logic device (PLD) and isa bus equipment slots, and wherein LBE bus host board slot, programmable logic device (PLD) are connected successively with isa bus equipment slots.

The utility model can also adopt following technical measures:

The chip model of described programmable logic device (PLD) is EPM1270T144-I5.

The advantage that the utility model has and good effect are:

In transformational structure between LBE bus of the present utility model and isa bus, isa bus equipment slots and LBE bus host board slot is connected to respectively at the two ends of programmable logic device (PLD), thus isa bus equipment and LBE motherboard can be connected respectively, thus define independently bus-structured conversion equipment, LBE bus has been come to the protocol conversion of isa bus circuit by programmable logic device (PLD), and extensibility is strong, this circuit to have structure simple, reliable operation, the features such as applicability is strong and easy to operate.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of the transformational structure between LBE bus of the present utility model and isa bus;

Fig. 2 is the schematic diagram of LBE bus host board slot in the transformational structure between LBE bus of the present utility model and isa bus;

Fig. 3 is the schematic diagram of isa bus equipment slots in the transformational structure between LBE bus of the present utility model and isa bus.

Embodiment

Referring to drawings and Examples, the utility model is described in detail.

Fig. 1 is the schematic diagram of the transformational structure between LBE bus of the present utility model and isa bus.

As shown in Figure 1, the transformational structure between LBE bus of the present utility model and isa bus, comprises LBE bus host board slot 1, programmable logic device (PLD) 2, isa bus equipment slots 3; Described LBE bus host board slot is connected with programmable logic device (PLD), and programmable logic device (PLD) is connected with isa bus equipment slots.

As shown in Figure 2, the LBE bus host board slot of connecting circuit of the present invention is used for the LBE Interface Host plate of access market standard, and user issues the data and duty that data control equipment work and treatment facility send.

The programmable logic device (PLD) of connecting circuit of the present invention for connecting LBE bus and isa bus, and completes LBE bus protocol and converts isa bus agreement to.

The chip model of programmable logic device (PLD) is the EPM1270T144-I5 of ALTERA company.

LBE bus protocol is: memory space, supports 8,16 and 32 read-writes, read-write space 8M; Input/output space, supports 8,16 and 32 read-writes, read-write space 1K;

Isa bus agreement is: when user will complete 8 of the space of below 1K or 16 I/O read or writes, first motherboard detects IOCS16# signal, distinguishes 8 also 16; Detect I/OCHRDY signal again, check whether equipment is ready to, then main frame sends corresponding effective address, and BALE signal is effective simultaneously, then will read or write effectively.When user will complete 8 of the space of below 1M or 16 memory read or writes, first motherboard detects MEMCS16# signal, distinguishes 8 also 16; Detect I/OCHRDY signal again, check whether equipment is ready to, then main frame sends corresponding effective address, and BALE signal is effective simultaneously, then will read or write effectively.

As shown in Figure 3, the isa bus equipment slots 3 of connecting circuit of the present invention is for the ISA interfacing equipment plate of access market standard.

Principle of work and the process of connecting circuit of the present invention are: first, LBE bus host plate, issue order or data that user sends, but order or data protocol are LBE bus protocols, programmable logic device (PLD), according to isa bus agreement, changes, draw related data, be issued in isa bus equipment; Isa bus equipment receives the instruction or data that LBE bus host plate issues, carry out the action of being correlated with, draw data result, then data result is sent in programmable logic device (PLD), programmable logic device (PLD) converts isa bus to LBE bus, uploads in LBE bus host plate.

The above, it is only preferred embodiment of the present utility model, not any pro forma restriction is done to the utility model, although the utility model with preferred embodiment openly as above, but, and be not used to limit the utility model, any those skilled in the art, do not departing within the scope of technical solutions of the utility model, certainly the technology contents of announcement can be utilized to make a little change or modification, become the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solutions of the utility model, according to any simple modification that technical spirit of the present utility model is done above embodiment, equivalent variations and modification, all belong in the scope of technical solutions of the utility model.

Claims

1. the transformational structure between LBE bus and isa bus, is characterized in that, comprising: LBE bus host board slot, programmable logic device (PLD) and isa bus equipment slots, and wherein LBE bus host board slot, programmable logic device (PLD) are connected successively with isa bus equipment slots.

2. the transformational structure between LBE bus according to claim 1 and isa bus, is characterized in that: the chip model of programmable logic device (PLD) is EPM1270T144-I5.