keil C51 Hello2事例

按键扫描 51单片机加8279 8279通过74LS 138译码器扩展4×4键盘、6位显示器。 由3-8译码器对SL0～SL2译出键扫描线，由另一3-8译码器译出显示器的位扫描线，并采用了编码扫描方式。 为了防止出现重键现象，扫描输出线高位SL3不参加键扫描译码。CPU对8279的监视采用了查询方式，故8279的中断请求信号IRQ悬空未用。 -Scan button 82,798,279 plus 51 single-chip decoder 74LS 138 through the expansion of 4 × 4 keyboard, the display 6. From 3-8 decoder SL0 ~ SL2 translated to the key scanning line, by another 3-8 decoder translated display scan line, and uses code scanning. In order to prevent the emergence of the phenomenon of re-key, scan the output line does not take part in high level SL3 scan decoding keys. CPU on the 8279 surveillance using the query mode, the 8279 interrupt request signal IRQ left unused.

友达LCD 2.8寸,配ILI9320的驱动程序.-AUO LCD 2.8 inch, with ILI9320 drivers.

IR识别程序,由INT0输入.适合51单片机.-IR identification procedures, INT0 input. MCU for 51.

这里有MSP4302274各个模块的源代码例程，拿来与大家分享-There MSP4302274 routine of each module s source code, and brought to share with you

内含各国最基础的电路图,并做了详细的说明,对做底层开发的人员很有用.-States containing the most basic circuit diagram, and to do such a detailed description of the development on the ground floor to do the personnel very useful.

用winband78e58 对422通讯操作，422通讯作为工业常用的串行通讯协议，使用广泛-with winband78e58 communications operation of 422, 422 communications industry as a common serial communication protocol, widely used

8051c 的一个Crc 算法分析-8051c of an algorithm analysis Crc

66PP22A单片机dtmf解码程序,用于DTMF通讯 软解码方式-66PP22A SCM DTMF decoder procedures for communications DTMF decoder soft approach

基于avr电子称都设计 精度高包含源码和电路图-Avr-based electronics that are designed with high precision

亲测：基于51单片机的八路抢答器，与其他同类源码比，功能强大，有查询，设置，抢答，答题等所有实用功能。-Pro-test: Based on 51 single-chip eight-way of the Answer, and with other source than the powerful, a query, settings, Answer, answer all practical function.