运算放大器的设计资料，最基础的，学科必备，每个硬件工程师的参考材料-Operational amplifier design data, the most basic, essential subjects, each of the reference materials hardware engineers

51实现计算器功能，实现基本的加减运算，以及温度测量和实时时钟-51 achieve the calculator function, to achieve the basic addition and subtraction, as well as temperature measurement and real-time clock

基于Embest IDE for ARM开发环境的程序源文件。使用ADD、SUB、LSL、LSR、AND和ORR等指令，完成基本数学与逻辑运算。-Embest IDE for ARM development environment based on the program source file. ADD, SUB, LSL, LSR, AND, and ORR instructions to complete basic mathematical and logical operations.