嵌入式操作系统ECOS的网络开发包

一个以AD9851做频率基准音频信号发生器，可以精确到0.01%。-AD9851 to do a baseline audio frequency signal generator can be accurate to 0.01%.

header to interface the c51 controller with special delay and otner initializing programs

1， SPI_877A,是针对PROBE877A所写。 SPI_877,是针对PROBE877所写。 SPI_77，是针对PROBE77所写。 初次使用使用PICMATE2004或者其简化版精灵版，如果为以上提到的3款型号，并有TPDEM1， 请根据PROBE型号在相应文件夹下打开项目，编译，并运行，具体连线请看各文件夹说明。 2， 其它文件夹项目均针对PROBE877A所建立，如果要使用PROBE877，请修改头文件，并选择PROBE877支持的芯片。 3， 严格禁止将PROBE877与877A混用，否则将造成仿真芯片工作异常。-1, SPI_877A, is written by PROBE877A. SPI_877, is written by PROBE877. SPI_77, is written by PROBE77. First-time use or its PICMATE2004 Wizard version of Starter Edition, if for the above-mentioned models 3 and TPDEM1, please PROBE models in the corresponding folder to open the project, compile, and run, the specific connection see the folder Note. 2, other projects are folders created for PROBE877A, if you want to use PROBE877, please amend the header file, and select PROBE877 support chips. 3, is strictly prohibited PROBE877 and 877A will be a mix, or else the work will result in simulation chips abnormal.

利用stm32的两片12位AD，使用DMA方式使AD自动采样。这个示例提供了一个如何使用ADC外围的简短描述，实际使用了AD的通道，非常适合初学AD的开发人员。本历程使用HAL_Driver库，有很强的可移植性。

PCI(外设部件互连)是当今个人计算机的主流总线结构，是微型计算机中处理器/存储器与外围控制部件、扩展卡之间的互连接口。PCI局部总线规范是互连机构的协议，也是电气和机械配置的规范。 本书分为9章，涵盖了PCI局部总线规范2.2版及其最新进展，详细介绍了PCI局部总线的原理和操作，内容包括PCI局部总线的基本概念、信号的定义、总线的操作、电气规范、机械规范、配置空间、66 MHz规范、BIOS和PCI-PCI桥等。书中通过大量的时序波形和实例对PCI局部总线的实际应用进行了深入浅出的阐述。 -PCI (peripheral device part interconnection) is now personal computer s mainstream bus structure, is in the microcomputer the processor/memory and between the periphery control portion, the expansion card interconnection connection. The PCI local bus standard is the interconnection organization agreement, is also the standard which the electricity and the machinery dispose. This book divides into 9 chapters, has covered the PCI local bus standard 2.2 edition and the newest progress, introduced the PCI local bus s principle and the operation in detail, the content including the PCI local bus s basic concept, the signal definition, main line s operation, the electricity standard, the mechanical standard, the disposition space, 66 MHz stand

i2c总线的verilog代码，绝对好用-i2c bus Verilog code, the absolute ease of use

工业用控制器源程序.-industrial controller source.

用C实现广告灯箱自动装置1、直流电机控制系统，控制广告牌的升降。 2、定时翻转广告，可由按键设定时长。 3、时间设置，5：00-22：00正常工作，其余时间不工作，时间可以调整。 4、到达广告的边缘部分广告停止翻转。 5、广告可以由按键设置升/降。 6、白天时间广告灯不亮，光线较暗时广告灯才亮，测试灯的好坏时可以手动控制灯光。 7、断电时保存时间及按键的设置，使广告牌到达边缘部分。 -C implementation using automatic device 1 advertisement light box, DC motor control system, control the rise and fall of advertising. 2, ads from time to time reversal, length of time set by the keys. 3, time set ,5:00-22: 00 normal job, the rest of the time does not work, time to adjust. 4, Get ads ads stop some of the edge flip. 5, ads can be set up by the button/drop. 6, ads during the day time lights are not bright, low light only bright lights when the ads to test the quality of light can control the lights manually. 7, when power-off time and save the settings button so that the edge part of advertising arrival.

一个基于ATmega64、VS1003、SD卡的mp3播放程序，在开发板上实现，具体电路图待做。-Based on the ATmega64, VS1003, SD card, mp3 player, in the development of on-board realize the specific circuit to be done.

 DM9000是一款高度集成低功耗快速以太网处理器，该芯片集成了MAC和PHY。DM9000可以和CPU直接连接，支持8位、16位和32位数据总线宽度。该芯片支持10M和100M自适应以太网接口，内部有16K的FIFO以及4K双字节SRAM，支持全双工工作。    DM9000内部还集成了接收缓冲区，可以在接收到数据的时候把数据存放到缓冲区中，链路层可以直接把数据从缓冲区取走。