CN2729800Y

CN2729800Y - Serial port communication test instrument

Info

Publication number: CN2729800Y
Application number: CN 200420086064
Authority: CN
Inventors: 郝迎吉; 仝海燕
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-10-18
Filing date: 2004-10-18
Publication date: 2005-09-28
Anticipated expiration: 2014-10-18

Abstract

The utility model relates to a serial port communication test instrument, which can test a serial port in the common intellectualized applied system as an isolated soft hardware entity. The structure comprises a master control module, a communication module, a keyboard module and a display module. The test instrument is designed with an RS485 bus, an RS232 bus and a Modem bus. Only simple connection is needed, according to actual conditions, to test communication in various sites. The Modem data transmission interface is provided to adjust and teat the Modem far-end system, which can simplify the adjusting and test equipment on site. Single-chip microcomputer technique is adopted with high anti-interference capability; wiring and maintenance are convenient, flexibility and extension are strong, and a compound key mode is used, which is easy to control.

Description

The serial communication tester

Technical field

The utility model serial communication tester is mainly used in asynchronous communication, can be applicable to debugging, fault analysis, network state of "smart" products etc.For the range of application of extension system, the design has the several data interface, has the range of application of broad.

Background technology

The present AccessPort device that adopts has following characteristics:

1, the multiple AccessPort device of making by computer software is fully arranged, adopt the RS232 bus to connect.Can carry out running status, controlled variable setting to the various serial equipments that the user makes, data transmission etc. are carried out on-line debugging; Go for the position of rest and the parity check bit of different transfer rates, communication, both can realize the breakpoint test, also can realize follow-on test.To having the measuring and controlling equipment of serial line interface, it is more convenient to carry out work such as equipment debugging, fault detect.

2, owing to the standard interface that adopts computing machine, as long as it is just passable, easy to use that corresponding software is installed.Weak point is present AccessPort device, can directly use for the Devices to test that uses the RS232 interface bus, and to using the Devices to test of RS485, MODEM interface bus, need external relevant hardware conversion equipment when carrying out the serial ports test.Also have, it is not very convenient using in the open air.

3, the utility model serial communication tester is except possessing 1,2 described advantages, it all is embedded into RS232, RS485, MODEM line in the middle of the Single Chip Microcomputer (SCM) system, can directly connect dissimilar Devices to tests, omitted external hardware conversion equipment, structural volume is little, compare with notebook computer, cost is low, is convenient to safeguard.Since be made into specialized equipment, easy and simple to handle, be convenient to open-air and general workman and use.

Summary of the invention

Goal of the invention of the present utility model provides a kind of portable serial ports test macro, at unit communication or the multi-computer communication in the asynchronous communication, can carry out the emulation on-line debugging, quick trouble-shooting source, can make things convenient for and real-time communication host and slave are carried out the scene detect, also can realize remote communication check simultaneously.

The technical scheme that realizes goal of the invention is to solve like this: the asynchronous communication detector, comprise central processor CPU (8) and communication module (5,6,7) connect, communication module is connected with the juice calculation machine of control system by external RS232/485 converter or RS232 bus, perhaps be connected with the Devices to test system by Modem bus (7) or RS485 bus (5), the viewing hardware circuit (3 of data, 4), the control line of liquid crystal (4) is connected with central processor CPU (8) by reverser 74HCO4 (3), the data line of liquid crystal is connected with central processor CPU, button (1,2) be connected with central processor CPU (8);

The utility model tester compared with prior art except the function that possesses existing AccessPort device, is gone back

Have following beneficial effect:

(1), adopt liquid crystal in this tester display module, can show a plurality of parameters simultaneously, directly perceived, convenient, and the design of composite push-button is convenient to carry out the change of parameter.

(2), the hardware circuit design of embedded many interfaces, all can directly connect use for the various Devices to tests of RS232, RS485, MODEM interface bus, saved the trouble of external hardware conversion equipment.

(3), all devices of this instrument all are produced on the little circuit board, making becomes a specialized equipment, structural volume is little, is convenient to the open air and carries.Can not be connected with computing machine and work independently, easy and simple to handle, general workman also can independently use, and has the property of great convenience and dirigibility.

Except that above-mentioned effect, this utility model detector is rational in infrastructure, practical, can save construction investment, and better economic and social benefit are arranged.

Description of drawings

Fig. 1 is the utility model serial communication tester network diagram;

Fig. 2 is data transmission and the transceive data display structure synoptic diagram of Fig. 1;

Embodiment

Accompanying drawing is the utility model instantiation

Below in conjunction with accompanying drawing content of the present utility model is described further:

1, a kind of novel serial communication tester, comprise central processor CPU (8) and communication module (5,6,7) connect, communication module is connected with the computing machine of control system by external RS232/485 converter or RS232 (6) bus, perhaps be connected with Devices to test by Modem bus (7) or RS485 bus (5), the viewing hardware circuit (3 of data, 4), the control line that comprises liquid crystal (4) is connected with central processor CPU (8) by reverser (3), the data line of liquid crystal is connected with central processor CPU, button (1,2) be connected with central processor CPU (8);

2, with reference to shown in Figure 2, when carrying out the scene detection, RS232 (6) bus of transmission interface employing full duplex or semiduplex RS485 (5) bus are connected to CPU (8) and form; Transtation mission circuit is connected to form by processor CPU and RS232 or RS485.

3, with reference to shown in Figure 2, when detecting at a distance, the available phone line can adopt the MODEM bus transfer as telecommunication media.

In sum, the dynamic duty process of total system is as follows: the data-signal of equipment to be detected can be selected to give central processor CPU by MODEM bus or RS232 bus or RS485 bus transfer according to actual conditions, and the data that again institute received of CPU are given liquid crystal and shown then; The data that send then send by RS232 or RS485 bus.

Claims

1, a kind of novel serial communication tester, comprise central processor CPU (8) and communication module (5,6,7) connect, communication module is connected with the computing machine of control system by external RS232/485 converter or RS232 (6) bus, perhaps directly be connected with Devices to test by Modem bus (7) or RS485 bus (5), the viewing hardware circuit (3 of data, 4,8), the control line that comprises liquid crystal (4) is connected with central processor CPU (8) by reverser 74HC04 (3), the data line of liquid crystal is connected with central processor CPU, button (1,2) be connected with central processor CPU (8).

2, serial communication tester according to claim 1, its feature just is that said central processor CPU (8) is connected with communication module (5,6,7), comprise CPU (8) and MAX485 communication module (5) or MAX232 (6) or MODEM module (7), realize the transmission and the reception of data.

3, serial communication tester according to claim 1, its feature just is that said button (1,2) is connected with central processor CPU (8), its hardware circuit part comprises directly being linked to each other with button (1) by processor CPU (8) and realizes the setting of Devices to test communication variable, comprises that processor CPU (8) and button (2) directly link to each other to realize the data transmitting-receiving, send out the control of receiving two states.

4, serial communication tester according to claim 1, its feature just is the viewing hardware circuit (3,4) of said data, the control line that comprises LCD (4) is connected with processor CPU (8) by reverser 74HC04 (3), and the data line of liquid crystal directly is connected with CPU, and the order of transmission and the data of reception can directly show on liquid crystal.