CN201352395Y

CN201352395Y - Singlechip testing board capable of being programmed and debugged online

Info

Publication number: CN201352395Y
Application number: CNU2009200000824U
Authority: CN
Inventors: 石建国
Original assignee: University of Electronic Science and Technology of China Zhongshan Institute
Current assignee: University of Electronic Science and Technology of China Zhongshan Institute
Priority date: 2009-01-05
Filing date: 2009-01-05
Publication date: 2009-11-25
Anticipated expiration: 2019-01-05

Abstract

The utility model discloses a singlechip testing board capable of being programmed and debugged online, a teaching testing board takes an SST89E5X serial singlechip as a master controller, an LED digital displayer, an LCD lattice display, an LED indicating lamp, a buzzer, a cavalcade type keyboard, a power driver, a serial E<2>PROM, a real-time clock, an A/D converter, a digital temperature sensor, an infrared transceiver, a USB-232 convertor and a signal leading-out withdrawal needle, the online programming and debugging can be carried out to the singlechip under the supporting of computer software. A simulator, a programmer and an applying board of the testing board are integrated into a whole, and the testing board has the advantages of small volume, low cost, high reliability, strong expansibility and the like.

Description

But the single chip computer experiment plate of online programming and debugging

Technical field

The utility model relates to a kind of single-chip microcomputer, more particularly, but relates to the single chip computer experiment plate of a kind of online programming and debugging.

Background technology

Single-chip microcomputer is a course that practicality is very strong, and a lot of students learn bad this subject, and its main cause is that practice is not enough.Limit by class hour, the teacher generally can only arrange the experiment of some checking property after having said principle, and Course Exercise subsequently also often becomes a mere formality, and makes student's designed capacity can not get effective exercise.Some student wishes to study in depth the exploitation of single-chip microcomputer outside class, but can not find a kind of Target Board that is fit to them.

At present, the single chip computer experiment case that uses in the teaching mostly adopts parallel mode of extension, runs counter to SOC (System on Chip, the system level chip) development trend of Single Chip Microcomputer (SCM) system.Though the function of this type of experimental box is many, but volume is big, the cost height, poor reliability, wherein a part also needs the support of emulator and programmable device, can't carry out designability experiment and product development separately, thereby is not suitable for use in student's extracurricular project training.

The utility model content

At the deficiencies in the prior art, the purpose of this utility model provides the single chip computer experiment plate that a kind of volume is little, cost is low, reliability is high, extensibility is strong.

To achieve these goals, but the utility model provides the single chip computer experiment plate of a kind of online programming and debugging, it comprises primary controller, described primary controller is a single-chip microcomputer, and has disposed LED nixie display, LCD matrix display, LED light, hummer, ranks keyboard, analog line driver, Serial E in its peripheral connection ²PROM, real time clock, A/D converter, digital temperature sensor, infrared transceiver, USB-232 converter and signal are drawn row's pin.

According to an embodiment of the present utility model, this single-chip microcomputer comprises the SST89E5X series monolithic.

According to another embodiment of the present utility model, this single-chip microcomputer comprises: the LED nixie display is 4 integrated display modules of positive type altogether; The LCD matrix display is 128 * 64 image display modules; The ranks keyboard is 2 * 8 matrix structures; Hummer is passive piezo-electric type; Analog line driver uses the L298 chip; Digital temperature sensor uses the DS18B20 type; Power valve in the infrared transceiver is common infrared transmitting tube, the integrated 38KHz infrared receiving module of receiving tube; The USB-232 converter uses FT232 and SP213 chip; Serial E ²PROM uses the AT24C1024 chip; Real time clock uses the PCF8563T chip; A/D converter uses the PCF8591 chip.

According to another embodiment of the present utility model, this single-chip microcomputer further comprises the USB cable that is used for carrying out single-chip microcomputer online programming and debugging under the computer software support.

According to another embodiment of the present utility model, this single-chip microcomputer further comprises the direct-connected power input of USB mouth with computing machine.

According to another one embodiment of the present utility model, this single-chip microcomputer further comprises the fuse that is arranged at power input.

According to another one embodiment of the present utility model, this single-chip microcomputer further comprises external power supply jack.

According to another one embodiment of the present utility model, this single-chip microcomputer further comprises the general mouthful of serial expansion bus that line makes up by single-chip microcomputer.

According to another embodiment of the present utility model, the serial expansion bus comprises realizes single-chip microcomputer and Serial E ²The I of the connection between PROM, real time clock, the A/D converter ²The C bus.

The beneficial effects of the utility model are, but provide the single chip computer experiment plate of a kind of online programming and debugging, it has abandoned the traditional mode that uses parallel bus expansion external memory storage, realized emulator with lower cost, programmable device is integrated with the application plate, greatly reduce Single Chip Microcomputer (SCM) system exploitation threshold, it is little to have volume, cost is low, the reliability height, advantages such as extensibility is strong, can be used as classroom instruction, the single-chip microcomputer Course Exercise, graduation project, the general target plate of extracurricular electronic practice and electronic contest training etc., by a large amount of case studies and practical training, student's Application Design ability is improved fast.

Description of drawings

Fig. 1 is the structure principle chart of a preferred embodiment of the present utility model; And

Fig. 2 is the single-chip microcomputer mouth line distribution diagram of preferred embodiment of the present utility model.

Embodiment

Below in conjunction with drawings and Examples preferred implementation of the present utility model is further detailed.

Fig. 1 is the structure principle chart according to the single-chip microcomputer of a preferred embodiment of the present utility model.What the utility model adopted is the SST89E5X series monolithic, comprises models such as SST89E52, SST89E54, SST89E58, SST89E516, its order set and pin arrangements and 80C51 single-chip microcomputer compatibility, and resource and performance index then have very big lifting in the sheet.The SST89E5X series monolithic removes has 8KB～64KB program storage, the 1KB data-carrier store, 48 I/O mouths, 3 16 bit timings/counters, 15 passage PCA (Programable Counter Array, the programmable counter array), 1 WDT able to programme (Watchdog Timer, house dog), 1 full duplex enhancement mode UART (UniversalAsynchronous Receiver/Transmitter, universal asynchronous reception/dispensing device), 1 SPI mouth (Serial Peripheral Interface, Serial Peripheral Interface (SPI)), outside 4 grades of interruptions of 8 vectors, also support IAP (in Application Programming, at application programming), ALE (Adress Lock Enable, address latch allows) output is forbidden, Brown-out detects functions such as (low-voltage detections).Particularly its IAP (at application programming) function greatly reduces the equipment expenditure of developing Single Chip Microcomputer (SCM) system, only needs be connected to by a USB cable USB mouth of computing machine, just can carry out the online programming and the debugging of Single Chip Microcomputer (SCM) program under the computer software support.

The program storage of SST89E5X single-chip microcomputer inside and data-carrier store can satisfy the actual needs of the brassboard that the utility model provides, thereby this brassboard abandoned the traditional mode that uses parallel bus expansion external memory storage, makes the single-chip processor i/o mouth line use ratio reach 100%.This single-chip microcomputer by 32 I/O mouth lines respectively with LED nixie display, LCD matrix display, LED light, hummer, ranks keyboard, analog line driver, Serial E ²PROM, real time clock, A/D converter, digital temperature sensor, infrared transceiver, USB-232 converter and signal are drawn row's pin and are linked to each other.The concrete allocative decision of mouth line need take all factors into consideration the inner structure of each I/O mouth of single-chip microcomputer and the work characteristics of different peripherals and function element is determined later on.

The size of the brassboard that the utility model provides is not more than 125mm (length) * 80mm (wide).Under the analog line driver no-load condition, this brassboard maximum operating currenbt is no more than 0.2A, can utilize the USB mouth of computing machine directly to power.For preventing that short circuit from causing computer failure, this brassboard power input is provided with the fuse of a 0.5A.In addition, this brassboard also is provided with external power supply jack, uses when conveniently driving high power load.

In preferred embodiment of the present utility model, the mouth line P0 timesharing of this single-chip microcomputer is as segment encode port LEDSEG, the FPDP LCDData of LCD matrix display of LED nixie display and the row output port KEYCOL of ranks keyboard, (mouthful line P2.7～P2.4) is as the control port LCDCtrl of LCD matrix display for mouthful line P2 high 4, low 4 of mouthful line P2 (mouthful line P2.3～P2.0) as the signal input port L298IN of power drive chip L298, also corresponding continuous simultaneously with 4 LED luminotrons.The mouth line P1.0 of this single-chip microcomputer is as the carrier wave output port IRCarry of infrared transceiver, mouthful line P1.1 together with mouth line P1.7～P 1.5 totally 4 mouth lines as the bit code port LEDBIT0～LEDBIT3 of LED nixie display, mouthful line P1.2 is as hummer control port BUZZ, and mouthful line P1.3 and P1.4 enable control port L298EN as power drive chip L298's.The mouth line RXD of single-chip microcomputer, TXD timesharing are as the data transmit-receive port COM232 of USB-232 converter and the data transmit-receive port IRTxRx of infrared transceiver, mouth line INT0 is as the interrupting input end mouth 8563INT of clock chip PCF8563T, mouth line INT1, T0 are as the capable input port KEYROW of ranks keyboard, mouth line T1 is as data/control port of digital temperature sensor DS18B20, and mouthful line WR, RD are as virtual I ²Clock and the serial data line of C bus (Inter-Integrated Circuit bus, internal integrate circuit bus).

I ²The C bus is a serial expansion bus commonly used in the scm application system, can pass through I ²The C bus is that single-chip microcomputer is expanded multiple peripheral function device and peripheral hardware.Because the SST89E5X single-chip microcomputer does not have configure hardware I ²Therefore C interface, in this preferred embodiment, utilizes two mouth lines of WR, RD, cooperates software code, has made up the virtual I of a cover ²The C bus.Software code is according to I ²The C design of protocol, can produce and standard I ²The work schedule that the C bus is the same is articulated in virtual I ²Device on the C bus comprises Serial E ²PROM, real time clock and A/D converter.

Employed components and parts model and specification are in this preferred embodiment: the LED nixie display is 4 integrated display modules of positive type altogether; The LCD matrix display is 128 * 64 image display modules; The ranks keyboard is 2 * 8 matrix structures; Hummer is passive piezo-electric type; Analog line driver uses the L298 chip; Digital temperature sensor uses the DS18B20 type; Power valve in the infrared transceiver is common infrared transmitting tube, the integrated 38KHz infrared receiving module of receiving tube; The USB-232 converter uses FT232 and SP213 chip; Serial E ²PROM uses the AT24C1024 chip; Real time clock uses the PCF8563T chip; A/D converter uses the PCF8591 chip.

The brassboard that provides in the utility model preferred embodiment has been abandoned the traditional mode that uses parallel bus expansion external memory storage, realized the integrated of emulator, programmable device and application plate with lower cost, greatly reduce Single Chip Microcomputer (SCM) system exploitation threshold, can be used as the general target plate of classroom instruction, single-chip microcomputer Course Exercise, graduation project, extracurricular electronic practice and electronic contest training etc., by a large amount of case studies and practical training, student's Application Design ability is improved fast.

This brassboard rich hardware resource, highly versatile can be supported multiple basic, comprehensive experiment and design, exploration projects.Involve experiments such as PWM (Pulse Width Modulation, pulse-length modulation) wave producer, frequency meter, video game machine if only use conventional peripheral hardwares such as luminotron, charactron, button, hummer just can carry out running lamp, traffic lights, music door-bell, mellotron, electronic clock, question-and-answer game apparatus, burglar alarm, electronic password lock, rectangle.If add other different assemblies, can also design a lot of off-the-shelf items, as Infrared remote controller, obstacle detector, multicircuit time controller, digital voltmeter, AWG (Arbitrary Waveform Generator), datalogger, flow detector, pulse test meter, water level controller, temperature measurement-control instrument, Target Tracking System, serial bus network model, distributed data acquisition system, apparatus for controlling elevator, intelligent toy car, simple and easy robot, digital videocorder, IC-card card reader, gate control system etc.

Certainly, those skilled in the art will recognize that, the above embodiments only play a part to explain to the utility model but not limit, if corresponding modify of the present utility model and distortion belong within the scope of the utility model claim and equivalent technologies thereof, intention then of the present utility model is also contained in these changes and the distortion.

Claims

1. but the single chip computer experiment plate of online programming and debugging, comprise primary controller, it is characterized in that: described primary controller is a single-chip microcomputer, and be connected with the LED nixie display in its periphery, LCD matrix display, LED light, hummer, ranks keyboard, analog line driver, Serial E ²PROM, real time clock, A/D converter, digital temperature sensor, infrared transceiver, USB-232 converter and signal are drawn row's pin.

2. single chip computer experiment plate according to claim 1 is characterized in that: described single-chip microcomputer is the SST89E5X series monolithic.

3. single chip computer experiment plate according to claim 1 is characterized in that: described LED nixie display is 4 integrated display modules of positive type altogether; Described LCD matrix display is 128 * 64 image display modules; Described ranks keyboard is 2 * 8 matrix structures; Described hummer is passive piezo-electric type; Described analog line driver uses the L298 chip; Described digital temperature sensor uses the DS18B20 type; Power valve in the described infrared transceiver is common infrared transmitting tube, the integrated 38KHz infrared receiving module of receiving tube; Described USB-232 converter uses FT232 and SP213 chip; Described Serial E ²PROM uses the AT24C1024 chip; Described real time clock uses the PCF8563T chip; Described A/D converter uses the PCF8591 chip.

4. single chip computer experiment plate according to claim 1 is characterized in that: further comprise the USB cable that is used for carrying out single-chip microcomputer online programming and debugging under the computer software support.

5. single chip computer experiment plate according to claim 1 is characterized in that: further comprise the direct-connected power input of USB mouth with computing machine.

6. single chip computer experiment plate according to claim 5 is characterized in that: further comprise the fuse that is arranged at described power input.

7. single chip computer experiment plate according to claim 1 is characterized in that: further comprise external power supply jack.

8. single chip computer experiment plate according to claim 1 is characterized in that: further comprise the general mouthful of serial expansion bus that line makes up by described single-chip microcomputer.

9. single chip computer experiment plate according to claim 8 is characterized in that: described serial expansion bus comprises realizes described single-chip microcomputer and described Serial E ²The I of the connection between PROM, described real time clock, the described A/D converter ²The C bus.