基于MSP430F13X系列16位单片机，实现的软件IO方式模拟I2C协议的C源码，已编译通过，并经过实际测试。希望对各位做嵌入式开发的朋友有所帮助。...

VB作上位机,通过跟51单片机通讯,控制家用电器电源的通断-VB for the host computer, through communications with the 51 single-chip microcomputer to control the power-off household appliances

用凌阳单片机控制显示电压步进，增减，并输出模拟电压

用C51写的EEPROM24c32（I2C）芯片读写程序-C51 written by EEPROM24c32 (I2C) chip to read and write procedures

MCS-51单片机汇编程序-MCS-51 assembler

三相步进电机的三相六拍工作方式，正转的绕组通电顺序：A、AB、B、BC、C、CA、A，反转的通电顺序：A、AC、C、CB、B、BA、B、A。 由于步进电机转子有一定的惯性以及所带负载的惯性，故步进电机的工作过程中不能及时的启动和停止，在启动时应慢慢的加速到预定速度，在停止前应逐渐减速到停止，否则，将产生失步现象。 步进电机的控制问题可总结为两点： 1、产生工作方式需要的时序脉冲； 2、控制步进电机的速度，使它始终遵循加速、匀速、减速的规律工作。 -Three-phase three-phase stepper motor six shot work, is to order the winding power: A, AB, B, BC, C, CA, A, reverse the order of power: A, AC, C, CB, B, BA, B, A. As the stepper motor rotor has a certain degree of inertia, as well as brought about by the inertia load, the stepper motor during the course of work should not start and stop time, start to be slowly accelerated to a predetermined speed, the stop should be to slow down gradually to the stop, otherwise, will result in out-of-step phenomenon. Stepper motor control problems can be summarized in two points: one, resulting in the need to work the timing pulse 2, control the speed of stepper motor, so that it always followed acceleration, velocity, deceleration of the law of the work.

ad转换0809的引用实例，次程序调试过，用作数字电压表，精度还不错。-ad conversion of the quoted examples of 0809, sub-program debugging, and used as a digital voltage meter, accuracy was not bad.

FAT12/FAT16/FAT32/NTFS specification

AT89C2051驱动步进电机的电路和源码, 源码为C语言.-AT89C2051 stepper motor drive circuits and source code, source code for the C language.

C8051f340的I2C程序，开发环境Silicon IDE-C8051f340 the I2C procedures, Silicon IDE development environment