New WinRAR ZIP archive

说明：  给初学c8051f410的小白提供的常用外设模块源码，串口，adc采集等等。(The common peripheral module source code, serial port, ADC collection and so on provided by Xiaobai, who is a beginner of C8051F410.)

正弦波的显示 ，示波器，keil5正弦波的显示 ，用于测试波形的产生(Sine wave display, oscilloscope, keil 5 sine wave display, used to test the generation of waveforms)

ATMEGA48 头文件 适用于 ICCAVR7.0 有些版本没有ATMEGA48的头文件(ATMEGA48 )

说明：  TLV5638 驱动 stm32 建议结合datasheet一起调试(TLV5638 Driver STM32 Recommends Debugging Together with Datasheet)

单片机入门推荐实验可以帮助大家快速入门，有大量代码，可供调用(experiment for 51MCU)

摘要 电能表作为用电量的测量工具广泛的应用于各种场合。在电能表校表系统中,需要的最基本的输入信号源是高精度双路正弦信号源,并要求可对其频率、相位、幅值进行调节,来对电能表进行校准。 基于单片机的程控信号源设计，运用数字调相、数字调幅和数字调频等技术，要求实现相位、幅度、频率的高精度程控调节。本文设计了一种利用锁相环频率合成技术和数字波形合成技术组成的程控低频正弦波信号发生器，并给出了调幅、调频、调相的实用电路，频率调节通过改变8253计数器的分频系数来实现；相位调节由51单片机预置计数器的计数初值来完成，幅度的调整通过改变DAC1210II的参考电压来实现，使频率分辨率达0.01Hz,相位调节精度达0.1°，并介绍电路中的主要芯的功能及使用。输出正弦波频率和幅值的精度高，稳定性好，失真度低，电路简单、可靠、便于程控。 关键词：数字合成信号源；程控；调幅；调频；移相； (Abstract Meter consumption as the size of the measurement tool is widely used in various occasions. In single-phase power meter verify system, the most basic needs of the input signal is the source of two-way high-precision sine signal source, and may request its frequency, phase, amplitude in a certain step to adjust to the imitate of the actual electricity load with a right meter calibration. Design of the programmable signal supply controlled source，which based on the MCU，including digital phase adjustment，distal amplitude adjustment，digital frequency adjustment etc．The system should achieve high quality digital adjustment of phase, amplitude and frequency. This paper describes the use of a PLL frequency synthesizer technology, and digital wave form synthesis technology consisting of program-controlled low-frequency sine wave signal issued devices, and applies the amplitude， frequency， phase of practical circuit. Frequency can be adjusted through a change in the 8253 counter-frequ)

STM32F103C8T6主控，SPI接口驱动RC522，使用USB转成虚拟串口直读A卡UID。(STM32F103C8T6 main control, SPI interface drive RC522, use USB to convert virtual serial port to A card UID.)

基于28335的移相程序，可以生成4组不同相位的互补的PWM波，从而可以实现开关电源的移相位操作(A phase shift program for 28335)

说明：  单片机处理信号的自动聚焦系统，利用单片机控制光学镜头，实现自动聚焦功能(Single-chip signal processing of the auto-focus system, the use of single-chip microcomputer controlled optical lens, to achieve auto-focus function)

编写0号中断处理程序，使得在除法溢出发生时，在屏幕中间显示字符串“divide error!”，然后返回DOS。(Write 0 interrupt handler, so that when the division overflow occurs in the middle of the screen displays the string divide error! , And then return to DOS.)