-
摄像头实验
采用STM32F429单片机连接摄像头采集图像，并附源码(STM32F429 MCU is used to connect camera to collect image, and source code is attached.)
- 2020-10-12 22:37:34下载
- 积分：1
-
DY12864电子钟_V2.1
杜洋单片机源程序，实现DY12864功能(Du Yang microcontroller source program to realize DY12864 function)
- 2018-05-06 12:48:55下载
- 积分：1
-
mega16_cymometer
avrmega16的频率计源码，在2m以内误差为1-3hz，1602显示(avrmega16 the frequency of source, in less than 2m error 1-3hz, 1602 show)
- 2009-02-19 14:36:41下载
- 积分：1
-
flash
基于低功耗单片机msp430f5438a的spiflash w25q128驱动 读写擦除(Based on low-power microcontroller msp430f5438a of spiflash w25q128 drive to read and write erase)
- 2013-11-19 09:03:07下载
- 积分：1
-
XC824M_SPWM
XC824单片机的编程代码,英飞凌8位机系列，初始化代码的参考例程(the code for xc824 8 bit MCU)
- 2018-08-22 10:35:13下载
- 积分：1
-
nec_part3
A Beginner’s Guide to
Modeling with NEC vol 3
- 2014-10-15 08:30:40下载
- 积分：1
-
RTX51tiny
51单片机上的实时操作系统RTX51程序5合一，含有信号量的使用，交通灯、电子钟等例子，并用含proteus仿真文件，非常适合对51单片机感兴趣同时想进入RTOS领域的同学(51 single-chip real-time operating system RTX51 program one that contains the example of semaphore use, traffic lights, electronic clock, and including proteus simulation file, very interested in the students want to get into the RTOS field for 51 single-chip)
- 2012-06-06 09:36:13下载
- 积分：1
-
PIC18Fuart
PIC18F通用urat串口的初始化及寄存器的设置(PIC18F serial port initialization and the setting)
- 2011-07-09 15:42:53下载
- 积分：1
-
shuanglushuzihecheng
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)
- 2021-04-08 20:19:00下载
- 积分：1
-
RN8209C及D初始化及UART通讯参考程序
RN8209C及D初始化及UART通讯参考程序(RN8209C and D initialization and UART communication reference program)
- 2018-08-29 09:08:34下载
- 积分：1
