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嵌入式中C51和A51函数互调，包括一些基本的介绍、规则、注意点。是嵌入式开发人员必须知晓的东东。不要错过奥！(C51 and A51 programs rules and examples.it helps you write, compile, and debug embedded programs.)

电源（电子变压器）美规的电子变压器，用在120V电压(Power supply (electronic transformers) U.S. regulatory electronic transformer with a 120V voltage)

51单片机的pid程序，设定上下限，控制pwm的输出。(51 MCU pid procedures set upper and lower limits, control pwm output.)

说明：  使用单片机利用超声波测距，里面包括源代码(Using Single Chip Microcomputer to Measure Distance by Ultrasound)

中颖SH79F084a 芯片的原厂例程. 内含有定时器,中断,ADC,IO操作. (SOP16.-The Sinowealth SH79F084A chip of the original factory routine. Contains a timer, interrupt,ADC, IO operation. SOP16.)

工业上采用的HART通信协议相关的资料，包含有HART命令、HART协议C语言源码。(HART communication protocol-related information used on industrial, including The HART command, HART protocol source code using C language .)

说明：  IIC驱动，可以驱动所有IIC接口电路,并且高度模块化，提供接口，易于修改移植！！！(IIC drive which can drive any chip with iic)

实时水流加热，可控水温的温度，经过水流量来精确控温无过冲热，温控精度高(heat flow watter!)

说明：  cpu卡 读卡示例程序 单片机stm32 编译环境keil(CPU card reading sample program STM32 compiler environment KEIL)

部分功能需要自行开放,源码完整可编译...一直珍藏的东西..希望大家拿去多多学习-CSA (stone) ... part of the package source feature requires its own open-source can compile a complete collection of things have been ... .. hope that everyone take a lot to learn