地磅的程序及图纸，

8051核的DES源代码 使用C语言写的基于51核的DES原码，变量定义使用汇编。占用了130字节RAM，比我所见到的包括汇编编写的都要快。 -8051 nuclear DES use source code written in C language based on the 51 nuclear DES original code, the use of variable definition compilation. Occupy the 130 byte RAM, than I have seen in the preparation of the compilation must fast.

输入三个整数x,y,z，请把这三个数由小到大输出。 1.程序分析：我们想办法把最小的数放到x上，先将x与y进行比较，如果x>y则将x与y的值进行交换，然后再用x与z进行比较，如果x>z则将x与z的值进行交换，这样能使x最小。-Enter the three integers x, y, z, please these three the number of small to large output. 1. Program analysis: We think of a way to put x number of the smallest, the first comparison of x and y, if x> y will be the value of x and y exchange and then to compare x and z, if x > z will be x and z values of the exchange, which will enable x minimum.

这是一个定时器程序。适合于单片机初学者-This is a timer program. Suitable for beginners ... ... MCU

编写函数int index返回字符t在字条串s中出现的最左边的位置，如果在s中没有与t匹配的子串，不返回-1-function int index prepared to return to the characters not string"s note appeared in the leftmost position, If s and t is not matched substring, not to return-1

电子钟的源码，是正确的，可以试试哦！应用于微机原理及接口。-Electronic clock source is correct, try Oh! Microcomputer Principle and Interface applies.

用汇编语言编写的兰花草音乐曲，实验时用51单片机一片，蜂鸣器一个，LM386一片，是学习51单片机典型实例，特共享给大家.-Written in assembly language orchids music music, experiments with a microcomputer 51, a buzzer, LM386 1, 51 MCU typical examples of learning, special to share to others.

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多功能按键判断程序，可以自如的判断何健按下-Multi-function button to determine the procedure, you can easily judge Arthur Press

从C51单片机最基本的节拍、机器周期、指令周期、指令时序谈开去，基础不扎实的汇编程序员的必补资料。-C51 cycles, reference for ASM programmer.

//浮点异常的控制位 #define FPUEM_INVALIDOP 0x01 #define FPUEM_DENORMALOP 0x02 #define FPUEM_ZERODIVIDE 0x04 #define FPUEM_OVERFLOW 0x08 #define FPUEM_UNDERFLOW 0x10 #define FPUEM_PRECISON 0x20 #define __FORCE_INLINE__ __inline /*---------------------------------------------------------- 打开指定的浮点异常 关闭指定的浮点异常-//float abnormal control-# define FPUEM_INVALIDOP 0x01# define FPUEM_DENORMALOP 0x02# define FPUEM_ZERODIVIDE 0x04# define FPUEM_OVERFLOW 0x08# define FPUEM_UNDERFLOW 0x10# define FPUEM_PRECISON 0x20# define __FORCE_INLINE __ __inline /*---------------------------------------------------------- designated open abnormal closure of the floating-point designated float anomalies