JPH0320855Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to a microcomputer applied learning device for acquiring basic knowledge of applying a microcomputer.

[Description of prior art]

Although the recent spread of microcomputers has been remarkable, conventional methods for beginners to learn the applied technology of microcomputers have been limited to written explanations in texts and the like. As a result, explanations become abstract and difficult to understand, which can cause learners to lose their desire to learn.
It takes a lot of time to learn techniques using only textbooks, and the learning effect can be said to be low.
On the other hand, a microcomputer has input/output devices such as input switches, sensors, A/D
Connecting converters, D/A converters, control DC motors, etc. and actually operating them will help you understand faster, and you will be able to learn the techniques quickly and smoothly, which will have a great educational effect. However, such devices are large and difficult to transport, so they cannot be easily used as teaching materials for learning techniques.

[Purpose of invention]

The present invention was created in view of the above-mentioned problems, and it is an object of the present invention to create a device in which a microcomputer or an input/output device can be actually operated in an easily transportable form that can be stored in an attaché case or the like. This allows microcomputers to be easily brought into educational settings, allowing learners to actually operate them, making it easier to master the basic technology of microcomputers, and increasing the effectiveness of their learning. The purpose is to provide a computer applied learning device.

[Key points of the idea]

The present invention is a microcomputer in which a control microcomputer section having an expansion bus line and an input/output board section connected to the expansion bus line of the microcomputer section are housed in a portable case. In the applied learning device, the input/output board section includes a DC motor to be controlled, a control circuit for controlling the DC motor,
An input switch for inputting parallel data, an LED display for displaying data, an analog/digital converter, a digital/analog converter, a sensor, an input circuit for this sensor, and a battery backup circuit are connected. an expansion connector for connecting the circuit on this input/output board to an external device, the above control circuit, input switch, LED display section, analog/digital converter, digital to analog converter, and the above input circuit. is connected to the internal data bus,
The input/output board section is characterized in that it is connected to an expansion bus line of the microcomputer section through a connector.

[Explanation based on examples]

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 is an external perspective view of the device according to the present invention, and FIG. 2 is a side sectional view taken along the broken line A in FIG.
FIG. 3 is a diagram showing the outer shape of the board.

This device is broadly divided into a microcomputer section 1, an input/output board section 2, and a power supply section 3, and each of these sections is housed in an aluminum alloy trunk 4 for easy transportation.

The microcomputer section 1 includes a control section, a logic operation section, a memory, etc., and is equipped with an expansion bus line.

The input/output board section 2 is connected to the expansion bus line through a connector 5. This input/output board section 2 includes a switch section, an LED (generating diode)
section, sensor section, A/D (analog/digital)
converter, D/A (digital/analog) converter,
A DC (direct current) motor part, memory part, universal part, and expansion connector part are attached. FIG. 4 is a circuit diagram of this input/output board unit 2, and each of the above-mentioned units will be explained in more detail based on this diagram.

The switch section consists of eight toggle switches 6 and one 8-bit dip switch 7. These switches are connected to ports A and C of PPI 8 in the I/O board, and are used to input data, set data,
It can be applied as a switch for operation commands. Ports A and C are also connected to expansion connector 9 and can be used as external input/output ports.

The LED section consists of eight light emitting diodes 10.
It is connected to port B of PPI 8 via driver 11 and used for data display, etc.

The sensor section includes a pair of light-shielding optical sensors 12 and a pair of metal sensors 13, which are connected to a sensor input circuit 14. The sensor input can be arbitrarily selected from either the flag sense method or the interrupt method by switching the jumper. Further, this sensor can be applied as object detection, limit switch, etc.

The A/D conversion section includes a one-chip CMOS A/D converter 15 of a 10/8-bit integration type circuit.
This converter 15 is a 4-channel analog
Built-in multiplexer with 0.1% FSR linearity
Max, total error is 0.2%FSR Max, conversion time
It has a performance of 15ms Max (10 bits) and 5ms Max (8 bits). This A/D conversion section converts analog input (0 to 5V) into digital data and is used for learning the A/D conversion function, and is connected to a volume 16 for setting test inputs.

The D/A conversion section includes a D/A converter 17 consisting of a multiplication type 8-bit high-speed D/A conversion circuit, and this converter 17 has a resolution of 8 bits, a maximum settling time of 150 ns, and a linearity error of 0.19%.
It has FSR performance and converts 8-bit binary code digital signals into analog DC current. A buffer amplifier 18 is connected to this D/A conversion section, and the output of this buffer amplifier 18 is connected to CN4 of the expansion connector section 9, so that analog voltage can be supplied to externally connected equipment. By measuring this voltage with the DC voltmeter 19, it is possible to learn how to deal with digital-to-analog conversion. Also, buffer amplifier 1
The output of No. 8 is used to control the rotational speed of the DC motor, which will be described later, by switching the jumper _J2 .

The DC motor section includes one +6V DC motor 20 and a DC motor control circuit 21 that controls this DC motor 20. This DC motor section controls the small DC motor 20 as part of output control learning, and applied learning can be performed by connecting it to the D/A conversion section as described above.

The memory section consists of a 2K byte CMOS RAM (random access memory) 22 and a storage battery 23 or supercapacitor for battery backup of this memory 22.
3 battery backup makes it non-volatile memory.

The expansion connector section 9 is a connector for expansion to the outside, and supports the following signals: ports A and C of the PPI 8 on the input/output board, 4 input channels of the A/D converter 15, and the input/output address decoder. 16 outputs, output of D/A converter 17, input to sensors 12 and 13, port C (bottom) of microcomputer 1,
B, is output from the connector.

The universal part 24 is a part provided in a part of the input/output board part, and it is possible to mount about 10 ICs.

The above-mentioned PPI 8, sensor input circuit 14, A/D converter 15, D/A converter 17, DC motor control circuit 21, and memory 22 are connected to an expansion bus line via a data buffer 24 by a data bus.

In addition, single-phase AC100V is input to the power supply section 3, and DC
Outputs +5V and DC±12V to supply the necessary DC power for the microcomputer and learning set.

Next, some examples of applied learning using the device of this embodiment will be described.

To learn parallel data input, manually set 8-bit data using the toggle switch 6, and input the data from the parallel input/output port.

To learn two sets of parallel data input, input 8-bit data with toggle switch setting 6 and 8-bit data with deep switch 7 setting from the parallel port, and process the data (addition, subtraction, AND, OR, EOR, etc.). After that, it is displayed on the 8-bit LED 10.

To learn the A/D conversion function, set the analog voltage using the volume 16 while watching the voltmeter 19, and set this to the A/D converter 1.
The digital value after conversion in step 5 is displayed on the 8-bit LED.
10.

To learn the D/A conversion function, program the digital values and check the output from the D/A converter 17 using the voltmeter 19.
In addition, the transition of digital values can be programmed,
Observe the output waveform from the D/A converter 17 with an oscilloscope.

Sensor input learning involves manually turning on and off the optical sensor 12 or metal sensor 13 and sensing it as a status or interrupt input.

In the learning of DC motor control, the DC motor is controlled on and off based on the on and off information from the toggle switch 6. or,
The DC motor is turned on with the ON information from the optical sensor,
The DC motor is turned off using the off information from the metal sensor. Alternatively, the digital value set in the program is D/A converted, and the speed of the motor is controlled by this buffer output. Or volume 1
A/D convert the analog voltage setting value according to 6,
Further, the speed of the motor 20 is controlled using an analog value obtained by D/A converting this digital value.

[Effects of the invention] As explained above, according to the invention, in microcomputer learning, the memory on the input/output board is a battery backup, so even when an exercise program is created, it can be stored for a long period of time. It is possible to save the information until the next learning session and continue learning about microcomputers over a long period of time. In addition, by storing example learning programs in a read-only memory on a microcomputer, transferring the programs to the memory of the input/output board section, and having the students execute and learn them, it is possible for learners to follow a common curriculum. You can have them perform common training. Furthermore, since the input/output board section is provided with an external expansion connector for connecting to external devices, it is possible to perform preliminary evaluation of experimental microcomputer devices and microcomputer systems using this input/output board.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of a device according to an embodiment of the present invention. Second
The figure is a side sectional view taken along the broken line A in FIG. FIG. 3 is a diagram showing the outer shape of the board section. FIG. 4 is a circuit diagram of the input/output board section 2. 1... Microcomputer section, 2... Input/output board section, 4... Trunk, 5... Connector,
6... Toggle switch, 7... Deep switch, 12... Light sensor, 13... Metal sensor, 1
5...A/D converter, 17...D/A converter, 19...DC voltmeter, 20...DC motor,
22...RAM.

Claims (1)

[Claim for Utility Model Registration] A control microcomputer section having an expansion bus line and an input/output board section connected to the expansion bus line of the microcomputer section with a connector are housed in a portable case. In the microcomputer applied learning device, this input/output board section includes a DC motor to be controlled, a control circuit to control the DC motor, an input switch to which parallel data is input, and an LED to display data. A display section, an analog/digital converter, a digital/analog converter, a sensor, an input circuit for this sensor, a memory circuit to which a battery backup circuit is connected, and a circuit on this input/output board section to an external device. an expansion connector for connecting to the above control circuit, input switch, LED display section,
An analog/digital converter, a digital-to-analog converter, and an internal data bus to which the input circuit is connected are arranged, and the input/output board section is connected to the expansion bus line of the microcomputer section with a connector. A microcomputer applied learning device.