8051C thorough application of the language (book)很有用的软件。

单片机实现通信工程实践Ｃ语言代码，欢迎有兴趣的朋友下载，因为是自己收集的代码没有仔细研究，希望对大家有用处！-MCU Communication Engineering Practice C language code, are welcome to download friends, because it is his collection of code without careful study, we hope to be useful!

本程序为应用在Arm7下的Ps2键盘接口程序。避免了因多中断而数据出现错误的情况-This procedure is used in ARM7 under the Ps2 keyboard interface program. To avoid interruption caused by more than the case of data error

目前市场上有很多语音录放系统，如录放音玩具、录音笔等，大多采用了单片机控制一个语音芯片，再接一个FLASH存储器的结构。单片机可以控制录放时间，选取特定时间段的播放以及单多声道的录放，容易通过改变外接存储FLASH改变录放时间。 我们做的是一个简单模型，只能录放。 只需要录音和放音时的外部 ROSC 端振荡电阻不同就能改变声音的录入和播放速度，录入的时间越短音质越好，录入的时间越长音质越差 它采用模拟量直接存贮技术，因此保真度高，音质好 -Currently on the market there is a lot of voice recording systems, such as sound recording toys, sound recording pens and so on, most of the single-chip microcomputer to control the use of a voice chip, making the structure of a FLASH memory. Single-chip microcomputer can control the playback time, select a specific period of time many of the players, as well as single-channel recording, easy to FLASH memory by changing the external playback time change. We make a simple model, only playback. Required only when the recording and playback-side oscillation of the external resistor ROSC will be able to change different recording and playback of sound speed, the shorter the time of admission, the better sound quality, longer recording sound worse using direct ana

单片机开发测试产线流水线速度，led显示速度-Single-chip development and testing of production line assembly line speed, led display speed

单芯片电子称重方案，包括代码和原理图，文档

LCD 显示屏由三片控 制，每个内部带有6 （512字节） 的RAM 对应关系如右图所示 片选对应表：

由8051组成的单片机系统通常情况下，P0口分时复用作为地址、数据总线，P2口提供A15-A8即高8位地址，P3口用作第二功能，只有P1口通常用作I/0口。P1口是8位准双向口，它的每一位都可独立地定义为输入或输出，因此既可作为8位的并行I/O口，也可作为8位的输入输出端。当工作在输入方式时，对应位的锁存器必须先置1,才能正确地读到引脚上的信号,否则,执行读引脚指令时,若对应位的锁存器的值为0，读的结果永远为0。-By 8051, composed of single-chip microcomputer system under normal circumstances, P0 timeshare I reuse as address, data bus, P2 I provide A15-A8 high eight address, P3 mouth for the second function, I usually only P1 for I/0 I. P1 I was eight quasi-two-way port, it can be independent of each and every defined as input or output, it can be used as 8-bit parallel I/O port, can also be used as 8-bit input and output side. When the work in the input, the corresponding bit latch must first buy one in order to correctly read the signal pin, or pin the implementation of reading instruction, if the corresponding bit latch the value of 0, Reading the results of Forever to 0.

BTF020实验程序-1 btf020开发板自带-Experimental procedures BTF020 development board comes with-1 btf020

对初学MCS-51单片机的很有帮助的，基础的知识-helpful MCS-51 for beginners helpful

isd1420语音芯片源程序用KEI UVISION打开-isd1420 voice chip source with open KEI UVISION