soft UART

内容：1、本程序用于测试4相步进电机常规驱动 2、需要用跳帽或者杜邦线把信号输出端和对应的步进电机信号输入端连接起来 3、速度不可以调节的过快，不然就没有力矩转动了 4、按s4（设置成独立按键模式）可以控制正反转 -Contents: 1, the procedure used to test the four-phase stepper motor-driven two conventional, need to jump cap or the signal output line of DuPont and the corresponding stepper motor signal input terminal connected three speed adjustment can not be too fast, Otherwise, there would be no moment of rotation of the four, according to s4 (set to form an independent key mode) can control the positive inversion

串口485通信的好范例子，在工程实践已经调试过了的，抗干扰性好-A good example of serial communication sub 485, in the engineering practice has been passed to debug, and anti-jamming good

ARM7开发板的USB源程序，好东西咯。 -ARM7 development board

读51按键，并将ascii码返回计算机串口调试助手，-Read 51 keys, and return the computer serial port debugging assistant

环境测量系统 -Environment environment measurement system measurement system

字模的提取程序,应用于单片机的小应用程序-Matrix extraction procedure, applied to small single-chip applications

正转，转四相步进电机，每相间隔70ms。C51程序 51单片机通用。-Is to switch to four-phase stepper motor, each interval of 70ms. 51 Single-chip Universal C51 procedures.

TELEPHONO的C51程序-TELEPHONO procedures

单片机相关资料，应该是初学者的良师益友。-SCM-related information, should be a mentor for beginners.

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