CN203838699U - Multifunctional debugging interface conversion device - Google Patents

Abstract

A multifunctional debugging interface conversion device, comprising a parallel port conversion module, an RS232 conversion module, an RS485 conversion module, a data control module, a mode selection module, a cable clip and a USB connector; the cable clip includes a parallel port terminal and The serial port terminal, the mode selection module includes a dial switch and a decoder; the data control module includes a control chip and a USBHUB chip connected to each other; the USB connector is connected to the USBHUB chip; the conversion chip of the parallel port conversion module, RS232 conversion The conversion chip of the module, the conversion chip and the decoder of the RS485 conversion module are respectively connected with the control chip, and the control chip selects and conducts the corresponding interface mode according to the dial code of the dial switch. The utility model has a small appearance and is easy to carry and use. The conversion between the serial port and the parallel port can be realized through the dial switch to meet the needs of different debugging interfaces. When debugging the equipment, it will not be unable to debug due to the wrong debugging line, and there is no need to bring two or three debugging lines. Wire.

Description

A multifunctional debugging interface conversion device

technical field

The utility model relates to an interface conversion device, in particular to a multifunctional debugging interface conversion device.

Background technique

With the rapid development of electronic computer technology, all kinds of electronic equipment are more and more widely used in production and life, especially in the aspect of automatic communication, all systems rely on electronic equipment to realize. Device debugging interfaces designed by different manufacturers are different, most of them are serial ports or parallel ports, which require different debugging cables to connect. However, serial ports and parallel ports have multiple interface types and multiple line sequence definitions, and the debugging lines of different manufacturers cannot be guaranteed to be universal. At present, notebook computers are mainly used in equipment debugging. With the upgrading of computer equipment, notebook computers and even desktop computers are rarely equipped with serial ports and parallel ports. Use the corresponding serial port or parallel port interface to connect with the manufacturer's debugging cable. At present, the serial port and parallel port to USB cables are finished cables with fixed interfaces. Once the debugging site finds that the debugging cable does not match the manufacturer's definition, it cannot be solved.

Utility model content

In order to overcome the disadvantages of the above-mentioned prior art, the purpose of this utility model is to provide a multifunctional debugging interface conversion device that can perform interface conversion as required.

In order to solve the above problems, the utility model adopts the following technical solutions: a multifunctional debugging interface conversion device, which is characterized in that it includes a parallel port conversion module, an RS232 conversion module, an RS485 conversion module, a data control module, a mode selection module, and a cable card Connector and USB joint, described parallel port conversion module, RS232 conversion module and RS485 conversion module all comprise interface chip and conversion chip; Described cable card connector comprises 50 terminals, wherein 25 terminals are parallel port terminals, and The interface chip of the module is connected, and the remaining 25 terminals are serial port terminals, which are respectively connected with the interface chip of the RS232 conversion module and the interface chip of the RS485 conversion module; the mode selection module includes a dial switch and a decoder; the data control module Including interconnected data selection chip and USBHUB chip; the USB connector is connected with the USBHUB chip; the conversion chip of the parallel port conversion module, the conversion chip of the RS232 conversion module, the conversion chip and the decoder of the RS485 conversion module are respectively connected with the data selection chip connection.

Further, the parallel port conversion module, the RS232 conversion module, the RS485 conversion module, the data control module, the mode selection module and the cable clip are arranged in a box, the dial switch is arranged on the surface of the box, and the wire The cable clip connector is arranged at the end of the box body, and the 50 terminals of the cable clip connector are arranged in upper and lower rows, with 25 terminals in each row.

Furthermore, the cable snap connector includes a wire loosening push plate and a wire clamp, and the wire loosening push plate includes a plate body and a shift block arranged on the plate body; the wire clamp is an elastic metal sheet, and the wire clamp Including the clamping end, there is a gap between the clamping end and the right side wall of the clamp, and the clamping end uses metal elasticity to clamp the cable connector; two rows of terminal slots are arranged on the top and bottom of the end of the box body. A wire clamp is arranged in each terminal groove, and a row of through holes communicating with the terminal grooves are respectively arranged on the upper and lower surfaces of the box body.

Furthermore, an anti-skid rack is provided on the clamping end.

Furthermore, the angle between the clamping end and the right side wall of the clamp is 5°-15°.

Further, the parallel port terminal is white, the RS232 serial port terminal is black, and the RS485 serial port terminal is blue.

Preferably, the DIP switch is a DIP flat DIP switch.

Preferably, the USBHUB chip is a GL850G chip.

Preferably, the decoder is a 74LS139 chip.

The beneficial effects of the utility model are:

1. It includes a box body end and a USB plug end, which is small in appearance and easy to carry;

2. It can realize the conversion of serial port and parallel port through the dial switch, which can meet the needs of different debugging interfaces of different manufacturers. When debugging the equipment, it will not be unable to debug due to the wrong debugging line, and there is no need to bring two or three debugging lines.

3. Its cable clamp adopts wire clamp and loose wire push plate. It is very convenient to fix the cable connector, which saves a lot of time for fixing the cable connector.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is described further:

Fig. 1 is a schematic view of the appearance structure of the first embodiment of the utility model;

Fig. 2 is a block diagram of the utility model;

Fig. 3 is the circuit diagram of the present utility model;

Fig. 4 is a side view of the box body of the first embodiment of the utility model;

Fig. 5 is a partial structural schematic diagram cut along line A-A in Fig. 4;

Fig. 6 is a partial structural view along the B direction in Fig. 4;

Fig. 7 is a structural schematic diagram of the loosening push plate of the utility model;

Fig. 8 is a schematic diagram of the structure of the wire clip of the present utility model;

Fig. 9 is a schematic diagram of the appearance structure of the second embodiment of the present invention.

In the figure, 1 box body, 2 USB plug, 3 data cable, 5 code switch, 11 terminal slot, 12 threaded hole, 41 loose wire push plate, 42 wire clip, 411 board body, 412 shift block, 413 connecting rod, 421 Clamping end, 422 wire clip right side wall, 4211 non-slip rack.

Detailed ways

The specific embodiment of the utility model is explained in detail below in conjunction with accompanying drawing:

As shown in Figure 1, the appearance structure of the first embodiment of the present utility model comprises box body 1, USB plug 2 and data line 3, parallel port conversion module, RS232 conversion module, RS485 conversion module, data control module, mode selection module and The cable clamp is arranged in the box body 1, and the dial switch 5 is arranged on the surface of the box body, and the dial switch is a DIP flat dial switch including three dial keys. The cable clip connector is set at the end of the box body. The 50 terminals of the cable clip connector are arranged in upper and lower rows, 25 in each row. In order to make it easier to distinguish, the 25 terminals in the upper row are parallel port terminals, and they are white; The 25 terminals in the lower row are used for serial ports, among which terminals No. 1-9 are RS232 serial port terminals, and the color is black, and terminals No. 16-25 are RS485 serial port terminals, and the color is blue.

As shown in Figures 4-8, in order to facilitate the wiring of the 50 terminals of the cable clip connector, a cable clip connector is used in this embodiment, which includes a loose wire push plate 41 and a wire clamp 42. The thread loosening push plate 41 includes a plate body 411 and a shifting block 412 arranged on the plate body 411, the shifting block 412 is fixed on the plate body 411 by a connecting rod 413, and the wire clamp 42 is an elastic metal sheet, as shown in Figure 8 As shown, the shape of the cable clamp 42 is similar to a square metal cylinder, except that there is a clamping end 421 on one side thereof, and there is a gap between the clamping end 421 and the right side wall 422 of the cable clamp. The clamping end 421 uses metal elasticity to hold the cable The joint 5 is stuck, and further, in order to clamp the cable joint 5 more easily, the clamping end 421 is an inclined surface, and the angle between it and the right side wall 422 of the clamp is 5 degrees to 15 degrees; further , an anti-skid rack 4211 is provided on the clamping end 421 . Two rows of terminal grooves 11 are arranged up and down on the end side of the box body 1, and a wire clip 42 is arranged in each terminal groove 11. The upper and lower surfaces of the box body 1 are respectively provided with The through hole of the shifting block, the through hole of the shifting block communicates with the corresponding terminal groove 11. During production, one end of the dialing through hole directly leads to the end of the box body to form an opening, and the connecting rod 413 is put into the box through the opening. The opening of the through hole of the shifting block is sealed with a plastic strip after the through hole of the shifting block, and the shifting block 412 is close to the clamping end 421 .

Below in conjunction with Fig. 2 and Fig. 3, the principle of the utility model and the circuit part are explained in detail: the utility model comprises RS232 conversion module, RS485 conversion module, data control module, mode selection module, cable snap connector and USB connector, described The interface chip of the parallel port conversion module includes 74LS273 address output chip, 74LS374 data output chip and 74LS244 data input chip, the interface chip of RS232 conversion module is MAX232 chip, the interface chip of RS485 conversion module is MAX485 chip, and the conversion chip of parallel port conversion module is CH341 Chip, the conversion chip of RS232 conversion module and RS485 conversion module adopts CH341T chip. The cable clamp includes 50 terminals, wherein 25 terminals are parallel port terminals, which are connected with the interface chip of the parallel port conversion module, and the remaining 25 terminals are serial port terminals, which are connected with the interface chip of the RS232 conversion module and the interface chip of the RS485 conversion module respectively. The interface chip is connected; the mode selection module includes a dial switch and a decoder, and the decoder adopts a 74LS139 chip. The data control module includes a data selection chip EP1C6 and a USBHUB chip connected to each other, and the USBHUB chip adopts a GL850G chip.

The USB connector uses a type A USB male plug. The USB interface circuit is designed according to the definition of the USB2.0 interface. There are 4 pins drawn out from the USB plug. The pin VCC is connected in series with an inductor L1 and then connected to the power supply VCC. The pins D- and D+ are respectively Connect with the DM0 pin and DP0 pin of the GL850G chip, and the pin GND is grounded.

The data control module is a bridge connecting the USB connector circuit and the conversion module, and consists of GL850G chip supporting 4-way USB2.0 input and output and auxiliary circuit components. The DM0 pin and DP0 pin of the USB main input and output interface are connected to the USB interface circuit pin D- and D+, and the DM1 and DP1 data pins of the first USB interface in the 4-way sub-interface are connected to the DO1- of the data selection chip EP1C6. It is connected with DO1+ data pin, the DM2 and DP2 data pins of the second USB interface are connected with the DO2- and DO2+ data pins of the data selection chip EP1C6, and the DM3 and DP3 data pins of the third USB interface are connected with the data The DO3- and DO3+ data pins of the selected chip EP1C6 are connected, and the fourth USB interface is reserved for use.

The RS232 serial port conversion module is composed of RS232 serial port interface chip MAX232, RS232 serial port to USB conversion chip CH341T and auxiliary circuit components. Among them, the pins UD- and UD+ of the conversion chip CH341T are connected with the DI1- and DI1+ data pins of the data selection chip EP1C6, and the RXD and TXD pins of the chip CH341T are connected with the RXDI and TXDI of the RS232 serial interface chip MAX232.

The RS485 serial port conversion module is composed of RS485 serial port interface chip MAX485, RS485 serial port to USB conversion chip CH341T and auxiliary circuit components. The conversion chip CH341T pin UD- and UD+ are connected to the data selection chip EP1C6 DI2- and DI2+ data pins, the chip CH341T’s RXD and TXD pins are connected to the RS485 serial interface chip MAX485’s RXD and TXD, and the CH341T’s TNOW tube The pin is connected with the RE and TE pins.

The parallel port conversion module is composed of a parallel port to USB conversion chip CH341, a parallel port interface chip and auxiliary circuit components. Use gate circuit components to combine the control signals output by the address selection pin AS, read and write control pin WR, and data selection pin DS of the parallel port to USB conversion chip CH341, and connect them to the control pins of the three parallel port interface chips . The data input and output pins DATA are directly connected to the data pins of the 74LS273 address output chip, 74LS374 data output chip and 74LS244 data input chip respectively, which can be regarded as a data bus. The pins UD- and UD+ of the conversion chip CH341 are connected to the data pins DI1- and DI1+ of the data selection chip EP1C6.

The DIP switch uses a DIP flat DIP switch with 3 DIP switches (K1, K2 and K3). The working mode is selected through the DIP switch as follows: when the DIP switch K1 is selected as 0, the DIP switch K2 and K3 are valid, When the dial switch K2 and K3 select 00, the conversion device is the RS232 serial port to USB interface mode; when the dial switch K2 and K3 is selected as 01, the conversion device is the RS485 serial port to USB interface mode; the dial switch K2 and K3 is selected as 10 , the conversion device is in the mode of parallel port to USB interface; when the dial switches K2 and K3 are selected as 11, it is an undefined mode, which is reserved for future expansion.

As shown in Fig. 9, the wiring method of the cable snap connector of the second embodiment of the present invention is fixed by bolts, that is, a threaded hole 12 is provided at the upper end of each terminal groove, and when the cable head is inserted into the terminal The cable head is fixed by a small bolt when the groove is inserted.

The above is only a preferred embodiment of the utility model, and for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, and these improvements and modifications are also regarded as It is the protection scope of the utility model.

Claims (9)

1. a Multifunctional debugging interface switching device, it is characterized in that, comprise parallel port modular converter, RS232 modular converter, RS485 modular converter, Data Control module, mode selection module, cable insulation displacement connector and USB joint, described parallel port modular converter, RS232 modular converter and RS485 modular converter include interface chip and conversion chip; Described cable insulation displacement connector comprises 50 terminals, wherein 25 terminals are parallel port terminal, be connected with the interface chip of parallel port modular converter, remaining 25 terminals is serial ports terminal, is connected respectively with the interface chip of RS232 modular converter with the interface chip of RS485 modular converter; Described mode selection module comprises toggle switch and code translator; Described Data Control module comprises interconnective data selection chip and USBHUB chip; Described USB joint is connected with USBHUB chip; Conversion chip and the code translator of the conversion chip of described parallel port modular converter, the conversion chip of RS232 modular converter, RS485 modular converter are connected with data selection chip respectively.

2. a kind of Multifunctional debugging interface switching device according to claim 1, it is characterized in that, described parallel port modular converter, RS232 modular converter, RS485 modular converter, Data Control module, mode selection module and cable insulation displacement connector are arranged in a box body, described toggle switch is arranged on box surface, described cable insulation displacement connector is arranged on box body end, 50 terminals of cable insulation displacement connector divide two rows setting, 25 of every rows.

3. a kind of Multifunctional debugging interface switching device according to claim 1 and 2, is characterized in that, described cable insulation displacement connector comprises loose ends push pedal and wire clamp, and described loose ends push pedal comprises plate body and is arranged on the shifting block on plate body; Described wire clamp is elastic sheet metal, and wire clamp comprises bare terminal end, between bare terminal end and wire clamp right side wall, leaves gap, and bare terminal end utilizes metallic elastic that cable connector is blocked; There are two row's terminal grooves the end of described box body is setting up and down, a wire clamp is set in each terminal groove, in the upper and lower surface of described box body, the through hole that one row communicates with terminal groove is set respectively.

4. a kind of Multifunctional debugging interface switching device according to claim 3, is characterized in that, on described bare terminal end, is provided with anti-skid rack.

5. a kind of Multifunctional debugging interface switching device according to claim 3, is characterized in that, the angle of described bare terminal end and wire clamp right side wall is 5 degree-15 degree.

6. a kind of Multifunctional debugging interface switching device according to claim 1 and 2, is characterized in that, described parallel port terminal is white, and RS232 serial ports terminal is black, and RS485 serial ports terminal is blue.

7. a kind of Multifunctional debugging interface switching device according to claim 1, is characterized in that, described toggle switch is DIP flat pattern toggle switch.

8. a kind of Multifunctional debugging interface switching device according to claim 1, is characterized in that, described USBHUB chip is GL850G chip.

9. a kind of Multifunctional debugging interface switching device according to claim 1, is characterized in that, code translator is 74LS139 chip.