crcmodula 进行 校验，在通信无线行业用的比较多

该代码是在8051系列单片机是实现Tcp/IP协议的代码，通过tcp/ip可以接入互联网。-The code in 8051 MCU is TCP/IP protocol code, by tcp/ip can access the Internet.

本款强排式热水器采用

firmware 3.0.5.2 for int6000 powerline

对新的液晶进行扫描，检查是否有坏的点阵-The new LCD to scan, check whether there is a bad dot-matrix

基于PIC单片机的PPOE协议栈源代码。-PIC on the PPOE protocol stack source code.

SPI是一个环形总线结构，由ss（cs）、sck、sdi、sdo构成，其时序其实很简单，主要是在sck的控制下，两个双向移位寄存器进行数据交换。 假设下面的8位寄存器装的是待发送的数据10101010，上升沿发送、下降沿接收、高位先发送。 那么第一个上升沿来的时候 数据将会是sdo=1；寄存器=0101010x。下降沿到来的时候，sdi上的电平将所存到寄存器中去，那么这时寄存器=0101010sdi，这样在8个时钟脉冲以后，两个寄存器的内容互相交换一次。这样就完成里一个spi时序。 -SPI bus is a ring structure, by ss (cs), sck, sdi, sdo composition, its timing is actually very simple, mainly under the control of the sck and two bi-directional shift register for data exchange. Assuming the following 8-bit register is loaded to send the data to be 10,101,010, rising to send, receive falling edge, high first sent. Well, the first rising edge to the time data will be sdo = 1 register = 0101010x. Falling edge comes, sdi on the level will be stored to the register, then register at this time = 0101010sdi, so 8 clock pulse later, the contents of two registers to exchange time. This will be completed in a spi timing.

硬件协议栈芯片W3100A和51单片机实现tcp客户端程序，在keil51环境中-hardware protocol stack and 51 W3100A chip MCU tcp client, in keil51 environment

51单片机键盘的相关处理，按键扫描，后针对具体应用进行相应处理．-51 Single-chip related deal with the keyboard, keypad scanning, after the specific application of the corresponding treatment.

8051C thorough application of the language (book)很有用的软件。-8051C thorough application of the language (book) very useful software.

基本的称重功能，和发挥部分的显示购物清单的功能，可以设置日期和重新设定 10 种商品的单价，具有超重报警功能，由于系统资源丰富，还可以方便的扩展其应用 -Basic weighing functions, and play to display a list of some of the features, you can set the date and re-setting unit 10 kinds of commodities, with overweight alarm function, the system is rich in resources, but also facilitate the expansion of its application