税控检测用的crc

CPU卡读写，符合7816标准。经测试完全可以使用。-CPU card reader, in line with the 7816 standards. Been tested and can be used.

C8051F040 SMBUS/// /////主机接收调试程序-C8051F040 SMBUS//////// receiving host debugger

KeilC51 下作的8*8LED显示程序。更改delay()时间和tab*表中的值，可以显示不同的图形-KeilC51 under the 8* 8LED display program. Change the delay () time and tab* in the table values, you can display different graphics

数字频率合成器DDS9851的驱动程序实验-频 铣 DDS9851 实

12864液晶在出厂时其对比度已经调好，所以用户在使用的时候第三管脚可不用接任何东西，本实验板上为了兼容多家12864液晶所以加了液晶对比度调节电位器，若用户使用我们配套的12864液晶可不用管它，液晶的第三管脚悬空就可以。有些液晶功耗比较大，用户在使用的时候可将液晶的第19、20引脚的背光不接，这样字体会很清楚-12864 LCD contrast, when the factory has a good tune, so when users can not access the third pin anything, this experiment in order to compatible with more than 12,864 on-board LCD so the addition of LCD contrast adjustment potentiometer, if users supporting our 12864 can not regardless of LCD, LCD" s third pin can be left vacant. Some relatively large power consumption of LCD, users can be used when the first 19,20 LCD backlight will not receive the pin, so that fonts will be very clear

标准IIC协议通信程序，能读写EEROM、实时时钟，使用方便，可靠！-Standard IIC protocol communication procedures, can read and write EEROM, real-time clock and easy to use, reliable!

51单片机采集DHT11温湿度传感器的温湿度值的测试程序源码，测试通过-51 SCM Acquisition DHT11 temperature and humidity values of temperature and humidity sensor test program source code, test

语音芯片PM50八方源代码，在播音函数中写入你需要播音的例子即可播放对应的语音。-voice chip PM50 from all source code, the audio function you need to write radio broadcast of examples corresponding voice.

CF卡转换成IDE标准接口的电路图，个人的意见可供大家参考-err

讲述了一个51单片机下的操作系统，有利于工程师再实际当中选用-about a 51 Microcontroller operating system, engineers have to use them in more practical