This procedure is the use of ARM7 control of two

在电子技术中，频率是最基本的参数之一，又与许多电参量的测量方案、测量结果都有十分密切的关系，因此频率的测量就显得更为重要。测量频率的方法有多种,其中电子计数器测量频率具有精度高、使用方便、测量迅速，以及便于实现测量过程自动化等优点，是频率测量的重要手段之一。在本次毕业设计中我们选择使用单片机来制作数字频率计，并在实际制作中采用了直接测频法。利用延时产生的时基门控信号来控制闸门，通过在单位时间内计数器记录下的脉冲个数计算出输入信号的频率，最终送入LCD中显示。这样制作出来的频率计不仅可以满足设计题目的参数要求，而且具有了单片机的稳定性和成熟性，且控制能力强，是一种低成本，高可靠的设计方案。-In electronic technology, the frequency is one of the most basic parameters, but also with a number of electrical parameters of the measurement program, the measurement results have a very close relationship between the frequency of measurement, therefore it is even more important. Measurement of the frequency of a number of means, electronic measurement of the frequency counter with high precision, easy to use, rapid measurement, and measurement is easy to realize the advantages of process automation is an important means of measuring the frequency of one. Graduates in this design we have chosen to make use of single-chip digital frequency meter, and used in the actual production of a direct

AVR ATMEGA32可以同时四路PWM输出，同时四路频率可调，占空比可调-AVR ATMEGA32 four PWM output at the same time, while four-way adjustable frequency, adjustable duty cycle

Documents and SettingsAdministrator桌面NAT.rar-Documents and Settings Administrator Desktop NAT.rar

51单片机实现经过裁剪的TCP/IP协议,编译环境Keil C51.-51 MCU after cutting TCP/IP protocol, the compiler environment, Keil C51.

usb开发 HID_KEYS 用单片机模拟usb开发-usb analog usb development HID_KEYS with MCU Development

本文件提供了关于ATMEGA16A的SPI的硬件结构及其使用代码，同时，本文件也适用与ATMEGA16及ATMEGA16L-This document provides information on the SPI hardware ATMEGA16A structure and the use of code, at the same time, this document also applies with ATMEGA16 and ATMEGA16L

一个单片机仿真程序，并带有仿真文件，线路调试程序，及原理图。-a microcontroller simulation program, and with simulation, circuit debugging procedures and schematics.

红外通信程序，在集中器采集器电表和手持终端及主台通信中有很好的运用-Infrared communication procedures, the concentrator meter collector and handheld terminals and main-Taiwan communications have a very good use

这是VB编程RS232串口（COM口）控制的D/A(数模转换)转换板的上位机演示程序。通过电脑串口（或其他具有串口的单片机、PLC、DSP）发个简单的可视ASCII指令，便可以方便地控制8个数模转换通道输出设定的电压值。比如,电脑串口输出字符串"C2V2660"到本控制板,则控制板将控制2号通道输出2.66V电压；电脑串口输出字符串"C6V3060"到本控制板,则控制板将控制6号通道输出3.06V电压.指令非常简单，完全不需了解复杂的硬件及时序控制。-This is a VB programming RS232 serial port (COM port) control D/A (digital-analog conversion) conversion board host computer demonstration program. Via the computer serial port (or other serial port of the microcontroller, PLC, DSP) made a simple visual ASCII commands, they can easily control the number of eight-channel DAC output set voltage. For example, the computer serial output string " C2V2660" to this control panel, then the control board will control 2-channel output 2.66V voltage computer serial output string " C6V3060" to this control panel, then the control board will control the 6 channel output voltage is 3.06V. instruction is very simple, completely without understanding of complex hardware and timing control.

直流电动机驱动器设计开发环境为ICC,可以编译成汇编,直接下栽到嵌入式avr单片机进行控制-DC motor drive design and development environment for the ICC, can compile a compendium, Embedded directly to the downward avr microprocessor control