Frequency-Meter

中文51单片机数据手册，包括89和90系列，初学者使用(Chinese 51 singlechip Data Handbook)

LPC1788FBD208的protel99SE库（原理图库）文件(the LPC1788FBD208 s Protel99 lib file)

- 0 = Channel 0 minus channel 1

MSP430系列单片机是美国德州仪器（TI）1996年开始推向市场的一种16位超低MSP430单片机功耗、具有精简指令集（RISC）的混合信号处理器（Mixed Signal Processor）。称之为混合信号处理器，是由于其针对实际应用需求，将多个不同功能的模拟电路、数字电路模块和微处理器集成在一个芯片上，以提供“单片机”解决方案。该系列单片机多应用于需要电池供电的便携式仪器仪表中。(Texas Instruments MSP430 MCU is (TI) 1996 began to market a 16-bit ultra-low-power MSP430 microcontroller with a reduced instruction set (RISC) mixed-signal processor (Mixed Signal Processor). Called mixed-signal processors, due to its demand for practical application, the plurality of different functional analog circuit, digital circuit modules and integrated on a single chip microprocessor, to provide a "single-chip" solution. The family of microcontrollers and more applications that require battery-powered portable instrumentation.)

程序为STM32 串口UART 使用DMA方式收发数据的实践(how to read data on UART by using DMA when number of bytes to receive is not known in advance.)

sketch_dec12a是arduino文件 读到上位机输出的字符串输出SD卡里面的语音信息。 sketch_dec12a是arduino文件 读到上位机输出的字符串输出SD卡里面的语音信息。(Sketch_dec12a is a string read from Arduino file to output from PC and output voice information in SD card.)

一些关于微生物燃料电池的英文文献，在网上不能免费下载。(Some of the English literature on microbial fuel cells can not be downloaded free of charge online.)

这是一个用于工控的上位机系统，可以实时监测温度，露点，湿度。用户可以根据具体情况设定报警点，当达到报警点，系统通过邮件发送报警信息给用户。(This is a PC for industrial control of the system, can be real-time monitoring of temperature, dew point and humidity. Users can set alarms based on specific circumstances, when the police reached, the system, through e-mail warning messages to users.)

本文件是基于51单片机的电子门铃设计程序，并且附带有proteus的仿真文件，可帮助单片机爱好者更好地学习哦！(This document is based on 51 single-chip electronic doorbell design procedure, and with proteus simulation files, can help single-chip computer enthusiasts learn better!)

说明：  STM32F407VET6核心板，包含封装库和数据手册，亲测可用(Stm32f407vet6 core board, including package library and data manual, available for personal test)