PCI总线的协议book，与PCI总线相关，^_^

Part III Figure 2a shows a circuit for a full adder, which has the inputs a, b, and ci, and produces the outputs s and co. Parts b and c of the figure show a circuit symbol and truth table for the full adder, which produces the two-bit binary sum cos = a + b + ci. Figure 2d shows how four instances of this full adder entity can be used to design a circuit that adds two four-bit numbers. This type of circuit is usually called a ripple-carry adder, because of the way that the carry signals are passed from one full adder to the next. Write VHDL code that implements this circuit, as described below. 2

本文档是关于boa web服务器的源程序，已经经过测试，稍做修改可进行嵌入式的移植-boa web server on the source code has been tested, can be tailored for embedded transplant

宏晶科技用c语言实现的EEPROM完整底层驱动程序，包括擦除、读写，flash保护等-Acer crystal technology with c language realize the underlying integrity of the EEPROM driver, including erase, read and write, flash protection

键盘开发源码，通过PS/2键盘用于对单片机的操作，其中包括了单片机的程序代码等等。-Keyboard to develop source code, through the PS/2 keyboard for single-chip operation, including the MCU code and so on.

using pointer lblink led - microblaze-using pointer lblink led- microblaze

SD卡和AIC23数字音频输出实验, FreeDev Audio Dsp Board采用了TI公司的TVL320AIC23 1、控制接口使用I2C，Quartus中将CS置低（器件地址0011010）。 2、数字音频接口使用了组件FreeDev_aic23,有三种测试和应用 模式，中断结合DMA方式能在NIOS II中采集和发送数据。中断信号 产生于模块中FIFO缓冲区的半满信号，读取数据端口自动清除中断 请求信号。 3、I2C IP 和FreeDev_aic23 IP分别在Quartus 工程目录中 4、SD卡读写通过SD_DAT0、SD_CLK、SD_CMD三个PIO信号线用软件 控制时序。 5、该范例读SD卡数据，通过DMA将Buffer数据送到FreeDev_aic23的 FIFO中实现数据播放。 6、SD卡中的数据必须是以48K*16bit保存的采样数据。数据可以通过SD读卡器写入。

频率计是常用的测量仪器，它通过对单位时间内的信号脉冲进行计数，从而测量出信号的频率。设计一个6位频率计，可以测量1～999 999 Hz的信号频率。-Frequency meter is commonly used measuring instruments, which per unit time of the signal pulse count in order to measure the frequency of the signal. 6 to design a frequency counter, can measure 1 ~ 999 999 Hz signal frequency.

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采集系统无限通讯上位机主程序，基于VB编写-Unlimited communication host computer acquisition system main program, based on the preparation of VB

用单片机设计完成多按键功能的温度计，主要采用51单片机完成的设计。-MCU design is completed with a thermometer multi-function buttons, the main use of 51 MCU to complete the design.