CN208077163U - A kind of Interface Expanding equipment based on EIM buses - Google Patents

Abstract

The utility model discloses a kind of Interface Expanding equipment based on EIM buses, the interface of UART modules accesses external equipment, and device data is put into the data address of interface, and configures the interface IP address of external equipment in status register by input equipment data；ARM chips read interface IP address, then read device data from the data address of interface by EIM buses；ARM chips are according to device data, to the running parameter data and interface type data of parameter configuration address configuration interface；Parameter controller read work supplemental characteristic is to configure the UART modules where interface the running parameter of interface, and select the interface type of interface according to interface type data.The utility model has the beneficial effects that solve the prior art can be selected baud rate it is few, the single problem of serial ports type of functionality；It is reconfigured independent Interface Expanding chip without outside, you can configured to interface parameters, realize at least 8 tunnel UART interface expanded functions and can flexibly select interface type.

Description

A kind of Interface Expanding equipment based on EIM buses

Technical field

The utility model is related to data communication technology fields, are set more particularly to a kind of Interface Expanding based on EIM buses It is standby.

Background technology

With the raising of scientific and technological level, marine radar, electronic chart, tachometer, compass, GPS, AIS etc. are gradually produced Many navigational aids, information fusion technology has huge impetus to the development of seafaring, however many navigations are set More external serial ports is realized for standby integrated needs.The serial ports expansion function that prior art is realized, there are problems to have：It can Select baud rate few, less than 8 kinds, rate is low, and highest only has 115200bps；High bit rate serial ports is cannot be satisfied to work at the same time, 115200bps baud rates only support individual serial ports to use；Achievable serial ports type is fixed, and can only such as be fixed and be realized RS232, if Factory need to be returned by being changed to RS485.Existing patent is such as：201610460639.7 proposing the extension module based on FPGA multichannels UART and expansion Exhibition method, only provides 8 kinds of baud rates, and highest only has 115200bps, RS232 and RS485 fixed modes of serial ports type.It is existing A kind of multi-channel serial port expanding unit based on fpga chip of patent；201711080825.9 a kind of simple RS232 multifunctional serial ports Expanding unit, tandem type is single, cannot meet the needs of selecting serial port function type for specific equipment.To sum up, existing skill Art also has prodigious transformation space, to meet more complicated diversified use demand.

Utility model content

In view of the above technical problems, the utility model provides a kind of Interface Expanding equipment based on EIM buses, without increasing External extended chip, you can realize high-speed, easy to operate, configuration is simple, and the multichannel interface that interface can be selected flexibly expands Exhibition.

A kind of Interface Expanding equipment based on EIM buses, including：ARM chips and fpga chip, the ARM chips and institute It states and is connected by EIM buses between fpga chip；The fpga chip is equipped with EIM bus control modules, status register, ginseng Number controller and UART modules, the UART modules connect the parameter controller, the parameter controller, the Status register Device connects the EIM bus control modules with the UART modules；The UART modules input external equipment number by its interface According to rear, the device data is put into the data address of the interface, and connecing for external equipment is configured in the status register Port address；The ARM chips read the interface IP address, then by the EIM buses from described in data address reading Device data, the ARM chips are further according to the device data, by the EIM bus control modules to parameter configuration address Configure the running parameter data and interface type data of the interface；The parameter controller is by the running parameter data and institute It states interface type data and is changed into corresponding running parameter and interface type, be re-fed into the UART modules to configure the interface Running parameter and interface type.

Further：It is additionally provided with the interrupt control unit being connect with the UART modules on the fpga chip, is used for institute It states ARM chips and sends interruption control signal, the ARM chips receive the interruption and control signal, with then reading the interface Then the device data is read in location by the EIM buses from the data address of the interface.

Further：The interface type includes RS232 and RS485 two types.

Further：The UART module numbers are 8.

Compared with prior art, the utility model has the beneficial effects that：It is few to solve the optional baud rate of the prior art, string The single problem of mouth type of functionality；It is reconfigured independent Interface Expanding chip without outside, only takes up a small amount of resource inside FPGA Interface parameters can be configured, realize at least 8 tunnel UART interface expanded functions, rate is high, configuration is simple, and interface type can Flexibly selection.

Description of the drawings

Fig. 1 is a kind of Interface Expanding equipment schematic diagram based on EIM buses that the utility model embodiment provides.

It is numbered in figure：1, ARM chips, 2, fpga chip, 3, EIM buses, 4, EIM bus control modules, 5, Status register Device, 6, parameter controller, 7, UART modules, 8, interface, 9, interrupt control unit.

Specific implementation mode

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work The every other embodiment obtained, shall fall within the protection scope of the present invention.

As shown in Figure 1, a kind of Interface Expanding equipment based on EIM buses, including：ARM chips 1 and fpga chip 2, ARM It is connected by EIM buses 3 between chip 1 and fpga chip 2；Fpga chip 2 is equipped with EIM bus control modules 4, Status register Device 5, parameter controller 6 and UART modules 7,7 quantity of UART modules may be configured as 8；7 Connecting quantity controller 6 of UART modules, Parameter controller 6, status register 5 and UART modules 7 connect EIM bus control modules 4；The interface 8 of UART modules 7 accesses outer Portion's equipment, input equipment data, and device data is put into the data address of interface 8, and configure outside in status register 5 and set Standby interface IP address；ARM chips 1 read interface IP address, after confirmation has the interface 8 of data transmission, by EIM buses 3 from there is number Device data is read according to the data address of the interface 8 of transmission；In preferred embodiment, interruption control is additionally provided on fpga chip 2 Device 9 interrupts control signal for being sent to ARM chips 1, and ARM chips 1, which receive, interrupts control signal, then reads interface IP address, Then device data is read from the data address of interface 8 by EIM buses 3；ARM chips 1 are total by EIM according to device data Running parameter data and interface type data of the line traffic control module 4 to parameter configuration address configuration interface 8；Parameter controller 6 will Running parameter data and interface type data are changed into corresponding running parameter and interface type, are re-fed into UART modules 7 to match The running parameter and interface type of interface 8 are set, that is, configures baud rate, check bit, channel etc., in preferred embodiment, interface class Type includes RS232 and RS485 two types.

EIM buses 3 use 32bit patterns, the inside of fpga chip 2 is that 3 block address are opened up in the read-write of ARM chips 1, i.e. data Location, data write address and parameter configuration address.By taking 8 road interfaces as an example, 0x0001~0x0008,0x1001~0x1008, 0x2000~0x2008, wherein 0x0001~0x0008 are ARM chips 1 to the parameter configuration addresses of 8 road interfaces, correspond to the respectively 1~8 tunnel parameter configuration；Address 0x1001~0x1008 is data write address, i.e., ARM chips will need to export external equipment The address is written in data；The addresses 0x2000 are status register, and it includes the states whether 8 road interfaces receive data； 0x2001~0x2008 is data address, i.e., data read address, and ARM chips read setting for external equipment input by these addresses Standby data.Corresponding 32bit data definitions are as shown in table 1：

Table 1

The utility model technology uses ARM+FPGA platforms, fpga chip by the EIM bus communications with ARM chips, into Row serial ports expansion.Present fpga chip has been widely used in marine navigation radar and has done the work(such as high-speed signal acquisition, signal processing Can, the utility model only occupies a small amount of resource inside FPGA and at least 8 tunnel UART interface expanded functions can be realized, without outside It is reconfigured independent serial port extended chip.ARM passes through shape inside EIM bus marcos FPGA according to actual external device parameters State register, to parameter configuration address configuration running parameter data (such as baud rate) and interface type data, FPGA will be received To running parameter data corresponding baud rate is changed by parameter controller, and be sent to each UART modules and matched It sets.To realize the expanded function of serial ports, and external circuit selection interface type is controlled, such as RS232 or RS485, by data It is sent to external interface.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is appreciated that can these embodiments be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaiied Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.

Claims (4)

1. a kind of Interface Expanding equipment based on EIM buses, which is characterized in that including：ARM chips and fpga chip, the ARM It is connected by EIM buses between chip and the fpga chip；The fpga chip is equipped with EIM bus control modules, state Register, parameter controller and UART modules, the UART modules connect the parameter controller, the parameter controller, institute It states status register and connects the EIM bus control modules with the UART modules；The UART modules, are inputted by its interface After external device data, the device data is put into the data address of the interface, and outer in status register configuration The interface IP address of portion's equipment；The ARM chips read the interface IP address, then from the data by the EIM buses The device data is read in location, and the ARM chips are further according to the device data, by the EIM bus control modules to ginseng Number configuration address configures the running parameter data and interface type data of the interface；The parameter controller joins the work Number data and the interface type data are changed into corresponding running parameter and interface type, are re-fed into the UART modules to match Set the running parameter and interface type of the interface.

2. a kind of Interface Expanding equipment based on EIM buses according to claim 1, it is characterised in that：The FPGA cores On piece is additionally provided with the interrupt control unit being connect with the UART modules, and control signal, institute are interrupted for being sent to the ARM chips It states ARM chips and receives interruptions and control signal, then read the interface IP address, then by the EIM buses from described The data address of interface reads the device data.

3. a kind of Interface Expanding equipment based on EIM buses according to claim 1, it is characterised in that：The interface class Type includes RS232 and RS485 two types.

4. a kind of Interface Expanding equipment based on EIM buses according to claim 1, it is characterised in that：The UART moulds Number of blocks is 8.