可以在电脑上实现，可以实现总线连接。用89C51单片机和SJA1000芯片有限..

有电路图和程序,都是正确的.如果有问题可以到我的博客 去留言,大家相互学习-A circuit diagram and procedures are correct. If the problem can go to my blog to the message, we learn from each other

采用反正法扫描方法对4X4矩阵式按键进行扫描，判断是哪个按键按下。-Scanning method used in any case law on the 4X4 keypad matrix scan to determine which keys are pressed.

KEIL C几种难得的编程技巧，比如教你如何节约内部RAM等，非常优秀-several rare KEIL C programming skills, such as teach you how to conserve internal RAM, excellent

MP3基于AVR的源程序，包含文件系统以及SD卡的驱动程序，并且有音频解码程序-AVR based MP3 source code, including file system, as well as SD card driver, and there are audio decoding process

串行通信程序，发送不是用中断方式，接收用中断方式，适用于程序的调试，液晶显示用的是1602-Serial communication program, sending instead of interrupt mode, receive mode using interrupted for Debugging, liquid crystal display using 1602

使用PIC芯片控制U2270读取125KHz ID卡卡号，因为所使用的PIC资源很少，此程序极为精简，包含中断曼切斯特解码和校验全过程，非常实用。-The use of PIC chip control U2270 Read 125KHz ID card number, because the use of PIC scarce resources, this program is extremely streamlined, with interruption of Manchester decoding and checking the whole process is very useful.

简易数字电压表可以测量0-5V范围的8路电压值，并在4位LED数码管上轮流显示或单路选择显示。-Simple digital voltage meter can measure the range of 0-5V Voltage road 8, and 4 digital tube LED display on a rotational basis or choose to display a single road.

自己编写的专门针对6122红外编码芯片的红外解码程序,使用定时器+中断,占用CPU时间少,能稳定可靠的解码

本程序可以支持SLE4442、SLE4428、FALSH、CPU卡-this program can support SLE4442, SLE4428 logic, FALSH, CPU card

I-WIRE协议的DS18B20程序,用于温度测量-I-WIRE Agreement DS18B20 procedure for temperature measurement