对单片机初学者非常实用的一些小程序，这是第一部分

DES/3DES算法的C语言实现，我对代码进行优化。只需要几十个字节的内存就可以。很适合用于单片机等下位机使用。-DES/3DES algorithm in C language, I optimized code. Only need dozens of bytes of memory can be. SCM is very suitable for such use under the plan.

单片机51控制硬盘的程序，含读写信息，可参考一下-control procedures on the hard drive containing information literacy, it can make reference to

测试单片机UART的程序，模块化非常好，稍加修改就可以作为应用层和底层模块之间的接口。-MCU UART test program, modular very good, with slight modifications can be used as application layer and the interface between the bottom of the module.

keil51环境开发，modbus通讯协议-keil51 environmental development, modbus communication protocol

DS18B20实时测量温度，并通过单片机控制显示，显示装置用数码管 -DS18B20 real-time measurement of temperature, and through single-chip control shows that display devices with digital control

HOLTEK单片机选型目录 HOLTEK单片机选型目录-HOLTEK single-chip single-chip Selection Selection HOLTEK directory directory

C51 七种实用子程序集 1-C51 seven practical subroutine sets a practical subroutine sets

基于51系列单片机的超声波测距壁障程序 采用4位共阴数码管显示-51 Series single-chip microcomputer-based ultrasonic ranging barrier procedure used a total of four digital tube display Yam

可在51单片机上运行的小型OS,不过最多任务数为16个-51 SCM in running a small OS, but the largest number of mission 16

With the program AD9854C.exe one can set and tune the frequency in CW-mode. For use as a receiver LO also IF can be given and the both possible receiving frequencies are printed on the screen. The level in Q-outputs can be varied by giving the wanted attenuation in dB. This function is done by controlling a 12b digital multiplier in the device. In this case the level decreases somewhat with increasing frequency as it does in DDS devices. Alternatively the inverse sinc correction can be chosen, in which case the output is flat and high. -With the program AD9854C.exe one can set and tune the frequency in CW-mode. For use as a receiver LO also IF can be given and the both possible receiving frequencies are printed on the screen. The level in Q-outputs can be varied by giving the wanted attenuation in dB. This function is done by controlling a 12b digital multiplier in the device. In this case the level decreases somewhat with increasing frequency as it does in DDS devices. Alternatively t