Description: he LPC932 can be used to create a Pulse Width Modulated PWM signal. That s an analog signal, with only 2 discrete levels, for example 0V and 5V and a constant period. The current value of this signal at a certain poiTnt of time is proportional to its Duty Cycle. That s the High Time during one period divided by the period. It can also be calculated as the average value during a particular period. That means after low pass filtering, (e.g. RC circuit) the signal becomes analog, with an actual value controlled by the microcontroller. The PWM functionality enables the LPC932 to control for example the speed of DC motors or the brightness of electric lighting.-he LPC932 can be used to create a Pulse Width Modulated PWM signal. That s an analog signal, with only two discrete levels, for example 0V and 5V and a constant period. The current value of this signal at a certain time is of poiTnt proportional to its Duty Cycle. That s the High Time during one period divided by the period. It can also be calculated as the average value during a particular period. That means after low pass filtering (eg RC circuit) the signal becomes analog, with an actual value controlled by the microcontroller. The PWM functionality enables the LPC932 for example to control the speed of DC motors or the brightness of electric lighting. Platform: |
Size: 1141 |
Author:赵树斌 |
Hits:
Description: 设计四 拔河游戏机
1、 设计一个能进行拔河游戏的电路。
2、 电路使用15个(或9个)发光二极管，开机后只有中间一个发亮，此即拔河的中心点。
3、 游戏双方各持一个按钮，迅速地、不断地按动，产生脉冲，谁按得快，亮点就向谁的方向移动，每按一次，亮点移动一次。
4、 亮点移到任一方终端二极管时，这一方就获胜，此时双方按钮均无作用，输出保持，只有复位后才使亮点恢复到中心。
5、 用数码管显示获胜者的盘数。
教学提示:
1、 按钮信号即输入的脉冲信号，每按一次按钮都应能进行有效的计数。
2、 用可逆计数器的加、减计数输入端分别接受两路脉冲信号，可逆计数器原始输出状态为0000，经译码器输出，使中间一只二极管发亮。
3、 当计数器进行加法计数时，亮点向右移；进行减法计数时，亮点向左移。
4、 由一个控制电路指示谁胜谁负，当亮点移到任一方终端时，由控制电路产生一个信号，使计数器停止计数。
5、 将双方终端二极管“点亮”信号分别接两个计数器的“使能”端，当一方取胜时，相应的计数器进行一次计数，这样得到双方取胜次数的显示。
6、 设置一个“复位”按钮，使亮点回到中心，取胜计数器也要设置一个“复位”按钮，使之能清零。
-design a tug-of-war game, can design a game of tug of war circuit. 2, circuit use 15 (or 9), light-emitting diodes, come only among a shiny, namely, the center of tug-of-war. 3, the game with a two button rapidly and continuously pressed, have a pulse, who by fast, Who bright spots on the move, every time, a bright spot in Mobile. 4, the party moved to highlight terminal diode, on the winning side, this time the two sides had no effect buttons, to maintain output, so after only bright spot reduction restored to the center. 5, digital Display won the bookkeeping. Teaching Tip : one, that the button signal input pulse signal every time the button should be able to effectively counter. 2, with reversible counter, plus or minus count input to receive two pulse signal, reversible counter to the Platform: |
Size: 292697 |
Author:万金油 |
Hits:
Description: he LPC932 can be used to create a Pulse Width Modulated PWM signal. That s an analog signal, with only 2 discrete levels, for example 0V and 5V and a constant period. The current value of this signal at a certain poiTnt of time is proportional to its Duty Cycle. That s the High Time during one period divided by the period. It can also be calculated as the average value during a particular period. That means after low pass filtering, (e.g. RC circuit) the signal becomes analog, with an actual value controlled by the microcontroller. The PWM functionality enables the LPC932 to control for example the speed of DC motors or the brightness of electric lighting.-he LPC932 can be used to create a Pulse Width Modulated PWM signal. That s an analog signal, with only two discrete levels, for example 0V and 5V and a constant period. The current value of this signal at a certain time is of poiTnt proportional to its Duty Cycle. That s the High Time during one period divided by the period. It can also be calculated as the average value during a particular period. That means after low pass filtering (eg RC circuit) the signal becomes analog, with an actual value controlled by the microcontroller. The PWM functionality enables the LPC932 for example to control the speed of DC motors or the brightness of electric lighting. Platform: |
Size: 1024 |
Author: |
Hits:
Description: 设计四 拔河游戏机
1、 设计一个能进行拔河游戏的电路。
2、 电路使用15个(或9个)发光二极管，开机后只有中间一个发亮，此即拔河的中心点。
3、 游戏双方各持一个按钮，迅速地、不断地按动，产生脉冲，谁按得快，亮点就向谁的方向移动，每按一次，亮点移动一次。
4、 亮点移到任一方终端二极管时，这一方就获胜，此时双方按钮均无作用，输出保持，只有复位后才使亮点恢复到中心。
5、 用数码管显示获胜者的盘数。
教学提示:
1、 按钮信号即输入的脉冲信号，每按一次按钮都应能进行有效的计数。
2、 用可逆计数器的加、减计数输入端分别接受两路脉冲信号，可逆计数器原始输出状态为0000，经译码器输出，使中间一只二极管发亮。
3、 当计数器进行加法计数时，亮点向右移；进行减法计数时，亮点向左移。
4、 由一个控制电路指示谁胜谁负，当亮点移到任一方终端时，由控制电路产生一个信号，使计数器停止计数。
5、 将双方终端二极管“点亮”信号分别接两个计数器的“使能”端，当一方取胜时，相应的计数器进行一次计数，这样得到双方取胜次数的显示。
6、 设置一个“复位”按钮，使亮点回到中心，取胜计数器也要设置一个“复位”按钮，使之能清零。
-design a tug-of-war game, can design a game of tug of war circuit. 2, circuit use 15 (or 9), light-emitting diodes, come only among a shiny, namely, the center of tug-of-war. 3, the game with a two button rapidly and continuously pressed, have a pulse, who by fast, Who bright spots on the move, every time, a bright spot in Mobile. 4, the party moved to highlight terminal diode, on the winning side, this time the two sides had no effect buttons, to maintain output, so after only bright spot reduction restored to the center. 5, digital Display won the bookkeeping. Teaching Tip : one, that the button signal input pulse signal every time the button should be able to effectively counter. 2, with reversible counter, plus or minus count input to receive two pulse signal, reversible counter to the Platform: |
Size: 292864 |
Author:万金油 |
Hits:
Description: 用CD4013双D触发器做的脉冲4分频器，以及单键触模式灯开关介绍，只用一个触摸电极片，就能完成开灯和关灯，以及多个触摸式开关电路举例-CD4013 dual D flip-flop used to do pulse 4 prescaler, as well as touch-mode one-touch light switches, the only one touching the electrode films, will be able to complete the turn on the lights and the lights are turned off, and the touch switch circuit, for example Platform: |
Size: 254976 |
Author:魏臻 |
Hits:
Description: 针对超声波应用系统易受噪声干扰以及超声波信号的空间衰减现象影响, 从而要求
超声波传感器工作在其最佳特性的特点, 论证了驱动脉冲信号的控制精度对传感器工作特
性的影响, 给出了传感器驱动信号脉冲宽度与传感器频率之间的最佳关系式, 提出了采用复
杂可编程逻辑器件(CPLD) 产生传感器驱动控制信号的方法, 将该方法应用于一超声波流
量计测量系统中, 得到了比传统型单片机控制电路更好的控制精度和控制效果。-For ultrasonic applications vulnerable to noise interference and attenuation of ultrasonic signals in the effects of space and thus require ultrasonic sensors work best features in its characteristics, demonstrated that the drive pulse signal of the control accuracy of the sensor characteristics of the work, given the sensor-driven signal pulse width and frequency sensors of the best relationship between the proposed use of complex programmable logic device (CPLD) have a sensor-driven control signal approach, the method is applied to one ultrasonic flowmeter measurement system has been more than traditional single-chip control circuit better control precision and control. Platform: |
Size: 223232 |
Author:李明 |
Hits:
Description: 一个键盘的消抖动电路。采用了硬件形式的，同时也键入了微分环节，可以将输出的脉冲降为一个时钟周期。-A keyboard eliminate jitter circuit. Used forms of hardware, but also type of differential link pulse output can be reduced to one clock cycle. Platform: |
Size: 3072 |
Author:鸿 |
Hits:
Description: PWM控制就是产生一定周期，占空比不同的方波信号，当占空比较大时，电机转速较高，否则电机转速较低。当采用FPGA产生PWM波形时，只需FPGA内部资源就可以实现，数字比较器的一端接设定值输出，另一端接线性递增计数器输出。当线性计数器的计数值小于设定值时输出低电平，当计数器大于设定值时输出高电平，这样就可通过改变设定值，产生占空比不同的方波信号，从而达到控制直流电机转速的目的。
直流电机控制电路主要由2部分组成，如图1所示：
FPGA中PWM脉宽调制信号产生电路；
FPGA中正/反转方向控制电路
-PWM control is a certain cycle, a different duty cycle square wave signal, when the duty cycle is high, higher motor speed, or lower motor speed. When the PWM waveform generated using FPGA, the FPGA internal resources only can be achieved, the figure one comparator output termination setting, the other linear incremental counter output termination. When the value of linear counter output is less than low-level settings, when the counter output is greater than high settings, so that by changing the settings can produce different duty cycle square wave signal, DC motor control to achieve the purpose of speed.
DC motor control circuit mainly by 2 parts, as shown in Figure 1:
FPGA in the PWM pulse width modulation signal generator circuit
Chiang Kai-shek FPGA/reverse direction control circuit Platform: |
Size: 37888 |
Author:袁玉佳 |
Hits:
Description: LPC932为例：创建一个脉宽调制信号的定时模式6
由Christian Kulig ，飞利浦半导体12/06/02
导言：
在LPC932可以用来创建一个脉宽调制PWM信号。
这是一个模拟信号，只有2离散水平，例如0V
和5V和恒定时期。目前的价值在这个信号
某一点的时间成正比其占空比。这是
高一期的时间除以时期。它也可以被
计算出的平均价值在某一特定时期。那个
意味着低通滤波后， （如RC电路）的信号变得
模拟，实际值所控制的微控制器。那个
脉宽调制功能使LPC932控制的速度，例如
直流电动机或电力照明亮度。
描述：
通用定时器表＃ t1的LPC932设置为PWM模式6 。
在此模式变成8位上升柜台特别8位
重载溢流。重载价值观的交替和代表
高级时间和减去一个时期的时候（ =低时间）的
PWM信号。每个溢出就中断或切换的
某端口引脚。
指定的端口引脚上T1是P0.7 。
例如交替的增加和减少的占空比的
PWM信号端口引脚P0.7介于0 ％和100 ％ 。
请注意，在Keil公司MCB900局此端口引脚不
连接到任何的发光二极管，然而的PWM可显示
与示波器。-LPC932 EXAMPLE: CREATING A PWM SIGNAL USING A TIMER IN MODE 6
by Christian Kulig, Philips Semiconductor 12/06/02
INTRODUCTION:
The LPC932 can be used to create a Pulse Width Modulated PWM signal.
That s an analog signal, with only 2 discrete levels, for example 0V
and 5V and a constant period. The current value of this signal at a
certain point of time is proportional to its Duty Cycle. That s the
High Time during one period divided by the period. It can also be
calculated as the average value during a particular period. That
means after low pass filtering, (e.g. RC circuit) the signal becomes
analog, with an actual value controlled by the microcontroller. The
PWM functionality enables the LPC932 to control for example the speed
of DC motors or the brightness of electric lighting.
DESCRIPTION:
The general purpose timer T1 of the LPC932 is set up to PWM Mode 6.
In this mode it becomes a 8 bit up-counter with a special 8 bit
reload on overflow. The reload Platform: |
Size: 10240 |
Author:your name |
Hits:
Description: 设计四 拔河游戏机 1、 设计一个能进行拔河游戏的电路。 2、 电路使用15个(或9个)发光二极管，开机后只有中间一个发亮，此即拔河的中心点。 3、 游戏双方各持一个按钮，迅速地、不断地按动，产生脉冲，谁按得快，亮点就向谁的方向移动，每按一次，亮点移动一次。 4、 亮点移到任一方终端二极管时，这一方就获胜，此时双方按钮均无作用，输出保持，只有复位后才使亮点恢复到中心。 5、 用数码管显示获胜者的盘数。 教学提示: 1、 按钮信号即输入的脉冲信号，每按一次按钮都应能进行有效的计数。 2、 用可逆计数器的加、减计数输入端分别接受两路脉冲信号，可逆计数器原始输出状态为0000，经译码器输出，使中间一只二极管发亮。 3、 当计数器进行加法计数时，亮点向右移；进行减法计数时，亮点向左移。 4、 由一个控制电路指示谁胜谁负，当亮点移到任一方终端时，由控制电路产生一个信号，使计数器停止计数。 5、 将双方终端二极管“点亮”信号分别接两个计数器的“使能”端，当一方取胜时，相应的计数器进行一次计数，这样得到双方取胜次数的显示。 6、 设置一个“复位”按钮，使亮点回到中心，取胜计数器也要设置一个“复位”按钮，使之能清零。--design a tug-of-war game, can design a game of tug of war circuit. 2, circuit use 15 (or 9), light-emitting diodes, come only among a shiny, namely, the center of tug-of-war. 3, the game with a two button rapidly and continuously pressed, have a pulse, who by fast, Who bright spots on the move, every time, a bright spot in Mobile. 4, the party moved to highlight terminal diode, on the winning side, this time the two sides had no effect buttons, to maintain output, so after only bright spot reduction restored to the center. 5, digital Display won the bookkeeping. Teaching Tip : one, that the button signal input pulse signal every time the button should be able to effectively counter. 2, with reversible counter, plus or minus count input to receive two pulse signal, reversible counter to the Platform: |
Size: 419840 |
Author:王维 |
Hits:
Description: 在音频功率放大器中，音量控制是必不可少的环节，尤其是现在用微电脑控制的多通道AV 功放，一般都采用一枚多通道音量控制芯片进行音量调节，而且根据标准要求：每个通道音量既需要总调又需要单独微调。脉冲电位器能够360 度旋转，音量调节速度可编程控制，它寿命长、不产生噪声，电路简单，这都是碳膜电位器无法比拟的。-In the audio power amplifier, volume control is an essential part, especially now with the microcomputer-controlled, multi-channel AV amplifier, generally use more than one chip-channel volume control to adjust the volume, but according to the standard requirements: the volume for each channel need both the overall tone also require a separate fine-tuning. Pulse potentiometer can rotate 360 degrees, adjust the volume rate of programmable control, it is long life, does not produce noise, simple circuit, this is carbon film potentiometer can not be compared. Platform: |
Size: 1024 |
Author:LU |
Hits:
Description: 本项目设计采用了6位数码管显示电路，在设计6位LED显示时，为了简化电路，降低成本，采用动态显示的方式，6个LED显示器共用一个8位的I/O，6位LED数码管的位选线分别由相应的P2.0--P2.5控制，而将其相应的段选线并联在一起，由一个8位的I/O口控制，即P0。译码显示电路将“时”，“分”，“秒”计数器的输出状态经显示译码器译码，通过6位LED七段显示器显示出来。达到定时电路时根据计时系统的输出状态产生的一个脉冲信号，然后去触发蜂鸣器发生器来实现闹铃。校时电路是用来对“时”，“分”，“秒”显示数字进行校对调整的。压缩文件中的仿真文件可以用Proteus查看。-The project was designed with six digital tube display circuit, in the design of six LED display, in order to simplify the circuit, reduce costs, dynamic display mode, 6 LED displays share one 8-bit I/O, 6 Wei LED Digital Choice of line pipe by the corresponding P2.0- P2.5 control, whereas the corresponding segment of its alignment parallel together by an 8-bit I/O port control, that is, P0. Decode display circuit will be "time", "sub", "seconds" counter output state by the display decoder decoding, through the six LED seven-segment display is displayed. To achieve timing circuit timing system according to the output of the state generated by a pulse signal, and then to trigger generator to achieve the alarm buzzer. The school when the circuit is used to "time", "sub", "seconds" display figures proofreading adjusted. Compressed file in the simulation files can be used Proteus view Platform: |
Size: 21504 |
Author:David |
Hits:
Description: 今天的微控制器速度已经可以通过软件轻而易举地实现这一切。而且更妙的是电压表和电流表成了免
费的副产品。微控制器的控制环无论如何都必须知道电压和电流值。你刚好也要显示它。我们要从微控制
器得到的是：一个在所有时间都用来测量电压和电流的A/D 转换器；一个根据命令为功率三极管提供基准
电压的D/A 转换器。问题是那个D/A 转换器的速度要非常快。如果在输出端检测到了短路，那么我们必
须立即减小三极管B 极上的电压，否则这个三极管就会损坏。“快速”意味着要达到毫秒级，如同运算放
大器一样。Atmega8 的A/D 转换器已经足够快了，但显然它没有D/A 转换器。使用脉宽调制和模拟低通滤
波器是可以得到一个D/A 转换器的，但是这样速度太慢了，无法通过软件立即实现短路保护。-The speed of today s micro-controller has been easily achieved through software, all that. And even more interesting is the voltage meter and ammeter become free
Charge by-product. Micro-controller control loop in any case have to be aware of voltage and current values. You have to show that it happened. We must microcontroller
Device get is: 1 at all times be used to measure voltage and current of the A/D converter one under the command and provide the basis for the power transistor
Voltage of D/A converter. The problem is that D/A converter to be very fast speed. If the output short circuit is detected, then we must
Shall immediately reduce the voltage on the transistor B pole, otherwise the transistor will be damaged. "Fast" means to achieve milliseconds, as the operator put
Like Da-qi. Atmega8 of the A/D converter has been fast enough, but apparently it does not D/A converter. The use of pulse-width modulation and analog low-pass filter
Wave device be able to get a D/A Platform: |
Size: 584704 |
Author:xiexie |
Hits:
Description: 4位数码扫描显示电路,我们控制一个七段LED需要8个输出端口；如果要输出四位十进制数，就需要32的输出端口，这将占用大量的端口资源。采用串行扫描显示，我们只需要8+4共12个端口即可。其原理是：用一个四位的输出端控制，某一时刻只选中其中的一个LED（输出为‘1’表示选中），八位的输出端将该LED所需要显示的值输出；然后四位的输出端值改变，选中下一个LED。这样依次类推。如果选择的频率很快，达到50Hz以上，由于人眼的视觉暂留效应，看起来就像4个LED同时显示。
设计一个程序，输入四个一位十进制数，用4个LED显示出来。CLK采用频率可调信号发生器，逐渐改变频率，观察扫描频率的改变对输出效果的影响。
输入：连续脉冲，逻辑开关；输出：七段LED。
-4 digital scanning display circuit, we need to control a seven-segment LED output port 8 If you want to output four decimal numbers, you need the output port 32, which will take up a lot of ports. Serial scans showed, we need only 8 of 12 ports can be+4. The principle is: the output of four with a control, a time to select only one LED (output 1 is selected), 8 output of the LED by the need to show the value of the output then The output value of the four changes, select the next LED. This and so on. If you select the frequency rapidly, reaching more than 50Hz, as the human eye s persistence of vision effect, looks like a 4 LED display simultaneously.
Design a program, enter a decimal number four, with four LED display. CLK signal generator with adjustable frequency, gradually changing the frequency of observed changes in scan frequency effect on the output.
Input: Continuous pulse, logic switches output: seven-segment LED. Platform: |
Size: 4096 |
Author:李小勇 |
Hits:
Description: 在足球机器人系统中，F2812两个事件管理器可以完成对电机的控制，但是其内部资源未能充分利
用，机器人功能也没有完善，在此利用事件管理器的TxCMP弓I脚，分别组成超声波测距系统、测温系统和红
外线通信的调制器：其中利用I／O功能的TICMP和T2CMP组成超声波测距系统；利用I／O功能的T4CMP模拟时
序组成测温系统；利用PWM功能的T3CMP产生高频脉冲来调制由SCIATX发送出来的串口信息组成红外线通信
系统，以大幅度减少控制芯片的外围电路，提高控制系统整体功能的稳定性，实现电机在实际控制中稳定
性，快速性，实时性的要求。-In the soccer robot system, F2812 two events manager can complete motor control, but failed to take full advantage of its internal resources
Use, the robot did not improve function in this use of event manager TxCMP I bow legs, forming an ultrasonic ranging system, temperature measurement system and red
Communication outside the modulator: one using I/O functions TICMP and T2CMP composition Ultrasonic Ranging System use of I/O functions T4CMP simulation
Sequence composed of temperature measurement system use of high frequency PWM function T3CMP pulse modulated by the SCIATX information form sent out the serial infrared communication
System to significantly reduce the external circuit control chip to improve the overall function of the stability of the control system, the motor control and stability in the actual
, Fast, real-time requirements. Platform: |
Size: 207872 |
Author:zhangdanqun |
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Description: 设计一个10进制同步计数器，带一个清零端，一个进位输出端。（如果改成六进制，应该如何修改程序）
计数器分为同步计数器和异步计数器两种，是典型的时序电路，分析计数器就能更好的了解时序电路的特性。所谓同步计数器，就是在时钟脉冲的控制下，构成计数器的各触发器同时发生变化的那一类计数器。异步计数器又称行波计数器，它的下一位计数器的输出作为上一位计数器的时钟信号，这样一级一级串接起来就构成了一个异步计数器。异步计数器与同步计数器不同之处就在于时钟脉冲的提供方式，但是，由于异步计数器采用行波计数，从而使计数延迟增加，在要求延迟小的领域受到了很大的限制。尽管如此，由于它的电路简单，仍有广泛的应用。
输入：逻辑开关，单脉冲按钮。输出：LED灯。-Design of a 10-N synchronous counter, with a clear end, a carry output. (If you change the hex, it should be as
Any amendment to the procedure)
Divided into synchronous and asynchronous counter counter counter two, is a typical sequential circuit, analysis of the counter can better understand
Timing characteristics of the circuit. The so-called synchronous counter, that is, under the control of the clock pulse, the counter triggers the same time constitute a change
The kind of counter. Asynchronous counter, also known as traveling wave counter, it s next on the counter output as a counter clock signal
No, this one a tandem together to form an asynchronous counter. Asynchronous counter and synchronous counter difference is that the clock
Pulse mode of delivery, but because of the asynchronous counter using wave count, so count delayed increase in the required areas of the small delay
Has been greatly restricted. However, because of its simple circuit, there are still widel Platform: |
Size: 1024 |
Author:chenguoxian |
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Description: 电子计数器测频有两种方式：一是直接测频法，即在一定闸门时间内测量被测信号的脉冲个数；二是间接测频法，如周期测频法。直接测频法适用于高频信号的频率测量，间接测频法适用于低频信号的频率测量。本文阐述了用数字电路设计了一个简单的数字频率计的过程。-Electronic counter measuring frequency in two ways: one is the direct frequency measurement method, that is, in a certain gate time measurement of the measured signal pulse number 2 it is indirect frequency measurement method, such as cycle frequency measurement method. Direct frequency measurement method for high-frequency signal frequency measurements, indirect frequency measurement method used in low frequency signal frequency measurements. This paper expounds the digital circuit design with a simple digital frequency plan process.
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Size: 439296 |
Author:媛媛 |
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Description: RTC的英文全称是Real-Time Clock,翻译过来是实时时钟芯片. RTC是PC主板上的晶振及相关电路组成的时钟电路的生成脉冲，RTC经过8254电路的变频产生一个频率较低一点的OS(系统)时钟TSC，系统时钟每一个cpu周期加一，每次系统时钟在系统初起时通过RTC初始化。8254本身工作也需要有自己的驱动时钟（PIT）。
-English name of the RTC Real-Time Clock, translated real-time clock chip RTC crystal and associated circuitry on the PC motherboard clock circuit to generate a pulse, the RTC after the 8254 circuit of variable frequency to produce a lower frequency of the OS(system) clock TSC, the system clock a cpu cycle plus one, each time the system clock in the system since the beginning of initialization through the RTC. The 8254 work also need to have their own drive clock (the PIT).
Platform: |
Size: 2048 |
Author:李柏林 |
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Description: VHDL 脉冲输入15进制输出计数器
计数器是实际中最为实用的时序电路模块之一-VHDL pulse input the counter of the output of the 15 hexadecimal counter the one of the of yes one of the the actual in the the most practical timing circuit module Platform: |
Size: 56320 |
Author:陳秋 |
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Description: 1、电路：引用“并口接口输入输出”，增加RS触发器电路，其输出控制T0（P3.4）外部计数输入端。
程序：计1个外部脉冲，LED数码显示段加1。
2、电路：引用“2.并口接口输入输出”，增加RS触发器电路，其输出控制外部中断-INT1（P3.3）。
程序：对每次中断，在左边第一个LED数码显示器上进行计数。-1, the circuit: Reference Parallel Interface input and output, adds RS flip-flop circuit, the output control T0 (P3.4) external count input.
Program: an external pulse meter, LED digital display segment plus one.
2, circuit: Reference 2. Parallel Interface input and output, adds RS flip-flop circuit, the output controls the external interrupt-INT1 (P3.3).
Program: for each interrupt on the left of the first LED digital display counts. Platform: |
Size: 2048 |
Author:诗意 |
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