CN200993840Y

CN200993840Y - USB single-chip computer simulating experimental instrument

Info

Publication number: CN200993840Y
Application number: CN 200620169001
Authority: CN
Inventors: 黄维翼; 吕勇; 罗大晖
Original assignee: Changzhou College of Information Technology CCIT
Current assignee: Changzhou College of Information Technology CCIT
Priority date: 2006-12-29
Filing date: 2006-12-29
Publication date: 2007-12-19
Anticipated expiration: 2016-12-29

Abstract

The utility model relates to a teaching experimental apparatus, in particular to an USB MCU simulating experimental apparatus, and is composed of a circuit board, a MCU and USB bus interface circuit on the circuit board and a peripheral experimental circuit. The experimental apparatus can get the power supply directly from the USB bus, but without external power supply. The USB interface circuit changes the USB bus into serial port for connecting with the MCU, and the experimental apparatus can carry out the real-time emulating adjustment on the experimental circuit and program on the experimental apparatus under the KEIL environment of the PC machine directly, after connecting the experimental apparatus with the USB interface of the PC machine, and a object code can be burnt in the MCU chip, integrating the experimental apparatus, the emulator and the programmer as whole. The experimental apparatus can easily connected with the PC machine, and is convenient in carrying, as well as can complete more 20 hardware experiments, and is beneficial for the experimenter to understand the MCU principle and developing and applied technique, and can promote the operation capability and innovation ability of the experimenter.

Description

USB type one-chip machine simulation experiment instrument

Technical field

The utility model relates to a kind of teaching and experiment equipment, particularly a kind of USB type one-chip machine simulation experiment instrument.

Background technology

" single-chip microcomputer and application thereof " is a specialized courses that practicality is very strong of specialties such as universities and colleges' computing machine, electronics, robotization, the link knowwhy that can consolidate on the classroom effectively to be learned by experiment, promote students'ability for practice and innovation ability comprehensively, turn out the required applied talent of industry, have two classes to be fit to the singlechip experiment apparatus that the student uses in the market:

One class links to each other with PC by the RS232 serial port, uses the external power supply power supply, and the experiment instrument of the another kind of USB of being known as type just obtains power supply by the USB interface of PC, being connected or the RS232 serial ports of real and PC.

More than two class experiment instruments when linking to each other with PC, generally mainframe box need be taken out of from computer desk, could be connected with cabinet RS232 serial port behind, if use external power supply, also need seek the alternating current 220V supply socket, therefore this two classes experiment instrument bothers when school's computer house uses very much, and is especially very inconvenient when the plug experiment instrument.

Summary of the invention

The purpose of this utility model is exactly to provide an experimental provision that integrates singlechip experiment apparatus, emulator, programmable device that links to each other with PC by USB interface to the student.

This New Type of Chip Microcomputer experiment instrument is made up of single-chip microcomputer, usb bus interface circuit, peripheral experimental circuit.Single-chip microcomputer is embedded with has the online software simulator of in-system programming function; The usb bus interface circuit converts usb bus to serial port and links to each other with single-chip microcomputer, and the power supply that obtains simultaneously on the usb bus is powered to experiment instrument; Peripheral experimental circuit comprises light-emitting diode (LED) module, dynamic LED display module, LCD MODULE, determinant keyboard module, buzzer circuit, one-shot circuit, infrared ray reception and sending module, Serial E ²PROM module, real-time clock module, SPI serial a/d modular converter, a line temperature sensor module can be finished more than 20 hardware experiments.

As long as with the USB interface of this experiment instrument, can use KEIL software carry out real-time simulation debugging on the PC during experiment to hardware circuit on the experiment instrument and experimental arrangement by USB cable line insertion PC.

Advantage of the present utility model is: experiment instrument is converted to serial port by the USB interface control chip with usb bus and links to each other with single-chip microcomputer, need not the RS232 cable of traditional experiment instrument, be very easy to simply with becoming being connected of PC, solved general experiment instrument effectively and be connected difficult problem with PC at school's computer house; Experiment instrument obtains the 5V power supply from usb bus, has saved external power supply, the embedded online software simulator of single-chip microcomputer that is adopted simultaneously, and has an in-system programming function, so need not the emulator and the programmable device of specialty, reduced the cost of experiment instrument widely, be convenient to student individual and have; The experiment instrument volume is very little, is convenient to the student and carries.

Description of drawings

Fig. 1 is a circuit structure block scheme of the present utility model.

Embodiment

As shown in Figure 1, USB type one-chip machine simulation experiment instrument is made up of single-chip microcomputer, usb bus interface circuit, peripheral experimental circuit, wherein the single-chip microcomputer SST89E58RD that selects embedded online software simulator for use and have the in-system programming function mixes crystal oscillating circuit and reset circuit; The usb bus control chip is selected CH341T for use, converts usb bus to serial port and links to each other with the SST89E58RD single-chip microcomputer; The dynamic display module of LED adopts 4 LED positive display altogether in the peripheral experimental circuit, the LCD LCD adopts the RT1602C module, and Keysheet module has 16 buttons, can select 4 * 4 determinant keyboards or 4 free-standing buttons by wire jumper, the infrared ray receiver module adopts HS0038, Serial E ²PROM selects 24C02 for use, real-time clock module is selected PCF8563 for use, and a line temperature sensor module is selected DS18B20 for use, and SPI serial a/d modular converter adopts TLC549, light-emitting diode (LED) module, buzzer circuit, monopulse produce circuit and are common component, need not give unnecessary details.

The utility model can carry out light emitting diode control, the stand alone type keyboard, determinant keyboard scanning, hummer control, the LED dynamic display, external interrupt, the timer experiment, external counting input simulation external interrupt, electronic stopclock, light-emitting diode luminance is regulated, from the data of serial port reception from PC, send data to PC by serial port, the read-write of 24C02, the PCF8563 real-time clock, the serial a/d conversion, frequency measurement, temperature survey, the infrared ray transmitting-receiving, LCD, pulse width measure, programming (IAP) in application, programming waits more than 20 hardware experiments in system.

Claims

1. USB type one-chip machine simulation experiment instrument comprises circuit board and is installed in single-chip microcomputer, usb bus interface circuit, peripheral experimental circuit on the circuit board that it is characterized in that: single-chip microcomputer is embedded with the online software simulator with in-system programming function; The usb bus interface circuit converts usb bus to serial port and links to each other with single-chip microcomputer.

2. USB type one-chip machine simulation experiment instrument according to claim 1 is characterized in that: peripheral experimental circuit comprises light-emitting diode (LED) module, the dynamic display module of LED, LCD MODULE, determinant keyboard module, buzzer circuit, one-shot circuit, infrared ray receiver module, infrared ray sending module, Serial E ²PROM module, real-time clock module, SPI serial a/d modular converter, a line temperature sensor module.

3. USB type one-chip machine simulation experiment instrument according to claim 2, it is characterized in that: single-chip microcomputer is SST89E58RD, it is CH341T that usb bus changes the serial ports control chip, one line temperature sensor module is DS18B20, real-time clock module is PCF8563, the serial a/d modular converter is TLC549, Serial E ²The PROM module is 24C02, and the infrared ray receiver module is HS0038, and LCD MODULE is RT1602C.