电路图和程序是正确的。如果问题可以去我的博客吨..

AVR串行通信的异步传输模式USART，通过RS232与计算机或者单片机进行串行通信。-AVR serial communication ATM USART, through computer-or single-chip RS232 serial communication.

CAN控制器SJA1000的标准帧，BsaicCAN模式，调好的初始化、发送、接收底层程序，大家共享。-CAN controller SJA1000 standard frame, BsaicCAN mode, tune good initialization, send, receive the bottom of procedures, for all to share.

程序实现A/D转换功能，A/D采用中断方式。该程序通过单片机的RA2模拟通道送入一直流电压

周立功单片机DP51+程序-weeks meritorious SCM DP51 procedures

sanDisk sd卡标准协议手册，很好的资料-sanDisk sd card standard protocol manual, very good information

MSP430下的一个微内核操作系统，很实用。做到底层无关，稍加修改可以移植到其他平台下。-MSP430 under a micro-kernel operating system, is very practical. Do not bottom, a little change can be transferred to other platforms.

数字钟是一种用数字电路技术实现时、分、秒计时的装置，与机械式时钟相比具有更高的准确性和直观性，且无机械装置，具有更更长的使用寿命，因此得到了广泛的使用。数字钟从原理上讲是一种典型的数字电路，其中包括了组合逻辑电路和时序电路。目前，数字钟的功能越来越强，并且有多种专门的大规模集成电路可供选择-Digital Clock is a digital circuit technology with the hours, minutes, seconds, timing devices, as compared with the mechanical clock has a higher accuracy and intuitive, and no mechanical devices, with more longer life, so be a wide range of use. Digital clock from the principle of speaking, is a typical digital circuits, including combinational logic circuits and sequential circuits. At present, the digital clock and more powerful, and there are a variety of specialized large scale integrated circuits to choose from

单片机嵌入式入门教程 汇编指令实验 扩展实验 A/D转换实验

RS485通信程序，采用ModBus协议，注解详细，学习ModBus的好文档-RS485 communication program using ModBus protocol, detailed notes, good documentation of the study ModBus

ZLG USB 套件-ZLG USB set of