CN201153020Y - Designed experimental apparatus based on PIC micro-controller - Google Patents
Designed experimental apparatus based on PIC micro-controller Download PDFInfo
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- CN201153020Y CN201153020Y CNU2008200737709U CN200820073770U CN201153020Y CN 201153020 Y CN201153020 Y CN 201153020Y CN U2008200737709 U CNU2008200737709 U CN U2008200737709U CN 200820073770 U CN200820073770 U CN 200820073770U CN 201153020 Y CN201153020 Y CN 201153020Y
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Abstract
The utility model relates to a design mode experiment device based on a PIC single chip, which belongs to the technical field of the electronic circuit design, and comprises the PIC single chip, as well as units connected with the PIC single chip, and the units comprises the following components: an electrical motor speed-measuring conversion unit, a temperature detection amplification unit, a digital display drive unit, an electrical motor speed-regulation drive unit, a communication receiving drive unit, a data storage expansion unit and a human-computer interface unit. When in use, the experiment device can choose designed and comprehensive experiment contents with different types and depths according to the individual interest of a student, and the student is caused to grasp the basic knowledge of the PIC single chip, and the comprehensive design ability and engineering application standard of the student are improved.
Description
Technical field
The utility model relates to a kind of experimental provision of single-chip microcomputer, belongs to the electronic circuitry design technical field.
Background technology
The PIC series monolithic adopts Harvard's bus structure, order set is the RISC reduced instruction set computer, have technical characterstics such as low-power consumption, low-voltage, big driving force, small size, low cost, obtain to use widely in various fields such as intelligent instrumentation, computer peripheral equipment, tame electric control, telecommunication communications.
University Of Tianjin is university of U.S. MICROCHIP company plan patronage school, lectures PIC series monolithic and application thereof.Find that in teaching process the experimental provision that uses exists extendability poor at present,, the designability content is few, can not embody problems such as PIC singlechip technology advance, and teaching efficiency is had a greatly reduced quality.Therefore we develop the design mode experimental provision that hi-tech level, extendability are strong, experiment content is abundant that has professional characteristic based on PIC single-chip microcomputer design mode experimental provision.
The utility model content
The purpose of this utility model is the above-mentioned deficiency that overcomes prior art, and the PIC single-chip microcomputer design mode experimental provision that a kind of extendability is strong, experiment content is abundant is provided, thereby can satisfy teaching and practice demand better.
The utility model adopts following technical scheme:
Design mode experimental provision based on the PIC single-chip microcomputer of the present utility model comprises the PIC single-chip microcomputer, and coupled the following units:
The motor speed measuring converting unit links to each other with the Timer input interface of PIC single-chip microcomputer, is used for the dc motor speed signal by optoelectronic switch output is input to the PIC single-chip microcomputer after the voltage comparator shaping;
The temperature detection amplifying unit links to each other with the A/D converter input channel of PIC single-chip microcomputer, is used for the voltage signal of temperature sensor output is input to the PIC single-chip microcomputer after amplifying;
Digital display driver unit: link to each other with the spi bus interface of PIC single-chip microcomputer;
The electric machine speed regulation driver element links to each other with the pin of the output pwm signal waveform of PIC single-chip microcomputer, perhaps links to each other with the PIC single-chip microcomputer by the D/A converter that links to each other with PIC single-chip microcomputer output interface, is used for direct current generator is carried out speed governing;
Communication receives driver element, links to each other with the serial communication interface of PIC single-chip microcomputer, and the Transistor-Transistor Logic level conversion of signals that is used for the PIC single-chip microcomputer is exported is the RS-232C level signal, and is Transistor-Transistor Logic level with the RS-232C level conversion, is input to the PIC single-chip microcomputer;
Data storage expanding element: pass through E
2The I of PROM extended device and PIC single-chip microcomputer
2The C bus links to each other;
Man-machine interface unit: link to each other with the I/O interface of PIC single-chip microcomputer.
Design mode experimental provision based on the PIC single-chip microcomputer of the present utility model, described man-machine interface unit can comprise matrix keyboard, LED light, serial LCD LCD or serial mini-printer.
PIC single-chip microcomputer design mode experimental provision of the present utility model increases more designability experiment content, improve the experimental technique level, strengthen hardware and start the training of part, inspire students'creative, divergent thinking, more can be at the interest of individual students, select dissimilar and designability, comprehensive experiment the content degree of depth, make the student in experiment, both grasp the rudimentary knowledge of PIC single-chip microcomputer, improve student's comprehensive Design ability and engineering application level again.
Description of drawings
The hardware configuration of Fig. 1 PIC design mode of the present utility model experimental provision.
Embodiment
PIC single-chip microcomputer design mode experimental provision of the present utility model is a core design with the PIC16F877 single-chip microcomputer.PIC16F877 is the middle-grade product of PIC series monolithic, adopts 14 RISC order set, under the prerequisite that keeps low price, has increased A/D converter, inner E
2Prom memory, relatively export, catch input, PWM output, I
2Many functions such as C bus and spi bus interface circuit, asynchronous serial communication interface circuit, analog voltage comparator, LCD driving, FLASH program storage can onlinely easily repeatedly be programmed and debug, and are particularly suitable for experimental teaching and use.
PIC single-chip microcomputer design mode experimental provision of the present utility model has been expanded seven hardware capability modules in the PIC16F877 outside, but and reservation expanding element, device only provides the required basic circuit device of operation to connect, but other chip, device portions all are designed to the external wire form of terminal, can carry out hardware circuit design according to different experiment contents, and do it yourself to carry out the circuit connection.
The experimental provision hardware configuration is described further its each functional module as shown in Figure 1 below.
1) motor speed measuring converting unit: dc motor speed detects and adopts optoelectronic switch, and the signal of optoelectronic switch output is counted by the PIC16F877 Timer after the voltage comparator shaping.
2) temperature detection amplifying unit: used integrated temperature sensor TMP36, it measures temperature range is-40 ℃ to+125 ℃, and in the time of 0 ℃, sensor output voltage is 0.5V; Output voltage is 750mV in the time of 25 ℃.1 ℃ of output voltage of the every increase of temperature increases 10mV, and the increment of variation of temperature amount and output voltage is linear, and the voltage signal of output is changed by A/D converter through the RAO mouth that is connected to PIC16F877 after amplifying.
3) digital display driver unit: used MAX7219 as 4 common cathode charactron display drivers, MAX7219 is compact, serial input and output display driver, comprise a binary-coded decimal in its sheet to the code translator of B sign indicating number and store each digital solid-state RAM of 8*8 etc., 3 line serial line interfaces can be connected on the I/O mouth of PIC16F877 easily, each numeral can be addressed and upgrade, and need not rewrite whole display.
4) electric machine speed regulation driver element: electric machine speed regulation can adopt dual mode, a kind of is the function of utilizing PIC16F877 own, promptly when CCP works in the PWM pattern, the RC2/CCP1 pin can the pwm signal waveform of output resolution ratio up to 10, can carry out speed governing to direct current generator; 10 D/A conversion chip MAX515 that another kind of mode then adopts MICROCHIP company to produce, this chip+5V single power supply, output area is that 0V is to VDD (supply voltage), supply current 140 μ A, serial input data, output voltage behind the amplifier driving circuit, can carry out speed governing to direct current generator continuously.
5) USART of communication reception driver element: PIC16F877 can be provided as with PC and carry out full duplex asynchronous communication, use MAX232 general serial reception/transmission driver chip to make level conversion, with the Transistor-Transistor Logic level conversion of signals of the TX of PIC16F877 output is the RS-232C level, be input to PC, and the RS-232C level conversion that PC is exported is a Transistor-Transistor Logic level, output to the RX pin of PIC16F877 single-chip microcomputer, thereby finish the transmission and the reception of data between single-chip microcomputer and the PC.
6) data storage expanding element: adopt to have I
2The 24LC01B of C interface includes the E of 128 * 8 Low-Power CMOS
2PROM has characteristics such as operating voltage is wide, erasable often, writing speed is fast.
7) man-machine interface unit: expanded matrix keyboard, monochrome, multi-colored led pilot lamp, 4 common cathode charactrons, serial LCD LCD, serial mini-printer, can use according to the different device of different experiments content choice.
Claims (2)
1. one kind based on PIC single-chip microcomputer design mode experimental provision, comprises the PIC single-chip microcomputer, it is characterized in that, comprises the following units that link to each other with the PIC single-chip microcomputer:
The motor speed measuring converting unit links to each other with the Timer input interface of PIC single-chip microcomputer, is used for the dc motor speed signal by optoelectronic switch output is input to the PIC single-chip microcomputer after the voltage comparator shaping;
The temperature detection amplifying unit links to each other with the A/D converter input channel of PIC single-chip microcomputer, is used for the voltage signal of temperature sensor output is input to the PIC single-chip microcomputer after amplifying;
Digital display driver unit: link to each other with the spi bus interface of PIC single-chip microcomputer;
The electric machine speed regulation driver element links to each other with the pin of the output pwm signal waveform of PIC single-chip microcomputer, perhaps links to each other with the PIC single-chip microcomputer by the D/A converter that links to each other with PIC single-chip microcomputer output interface, is used for direct current generator is carried out speed governing;
Communication receives driver element, links to each other with the serial communication interface of PIC single-chip microcomputer, and the Transistor-Transistor Logic level conversion of signals that is used for the PIC single-chip microcomputer is exported is the RS-232C level signal, and is Transistor-Transistor Logic level with the RS-232C level conversion, is input to the PIC single-chip microcomputer;
Data storage expanding element: pass through E
2The I of PROM extended device and PIC single-chip microcomputer
2The C bus links to each other;
Man-machine interface unit: link to each other with the I/O interface of PIC single-chip microcomputer.
2. the design mode experimental provision based on the PIC single-chip microcomputer according to claim 1 is characterized in that described man-machine interface unit comprises matrix keyboard, LED light, serial LCD LCD or serial mini-printer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200737709U CN201153020Y (en) | 2008-01-28 | 2008-01-28 | Designed experimental apparatus based on PIC micro-controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200737709U CN201153020Y (en) | 2008-01-28 | 2008-01-28 | Designed experimental apparatus based on PIC micro-controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201153020Y true CN201153020Y (en) | 2008-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200737709U Expired - Fee Related CN201153020Y (en) | 2008-01-28 | 2008-01-28 | Designed experimental apparatus based on PIC micro-controller |
Country Status (1)
| Country | Link |
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| CN (1) | CN201153020Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108255110A (en) * | 2018-02-01 | 2018-07-06 | 湖南华菱湘潭钢铁有限公司 | Add slag controller |
| CN108983760A (en) * | 2018-10-16 | 2018-12-11 | 昆明北方红外技术股份有限公司 | Function of the MCU and source current test device |
-
2008
- 2008-01-28 CN CNU2008200737709U patent/CN201153020Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108255110A (en) * | 2018-02-01 | 2018-07-06 | 湖南华菱湘潭钢铁有限公司 | Add slag controller |
| CN108983760A (en) * | 2018-10-16 | 2018-12-11 | 昆明北方红外技术股份有限公司 | Function of the MCU and source current test device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081119 Termination date: 20110128 |