Modbus_4

方向传感器ＭＭＡ7455　在ＧＢ60　上的应用程序(Ｃ51编写）(MMA7455 orientation sensor on the test procedures in GB60 (C51))

stm32f103c8t6驱动DS18B20温湿度传感器程序源码(stm32f103c8t6,DS18B20)

说明：  该源码实现51单片机之间符合modbus通信协议的通信(This code can achieve communications between MCS51 by modbus protocol. )

门禁开发流程，通用流程解析，详细分析了小区门禁开发流程和思路等(Access control development process, general process analysis, train of thought analysis, etc.)

测试STC15W408AS的I/O口是否正常(Test whether the I/O port of STC15W408AS is normal)

串口发送数据，字符，12864接受并显示字符(Serial port to send data, the character, to accept and display the character 12864)

iic接口的程序，可以用于f149单片机(iic interface procedures can be used F149 microcontroller)

采用C语言编写的模糊PID算法，该算法写了详细的注释。。。(Fuzzy PID algorithm C language, the algorithm wrote detailed notes. . .)

编制MCS-51程序使步进电机按照规定的转速和方向进行旋转，并将已转动的步数显示在数码管上。 　　步进电机的转速分为两档，当按下S1开关时，加速旋转，速度从10转/分加速到60转/分。当松开开关时，减速旋转，速度恢复为10转/分。当按下S2开关时，按照逆时针旋转；当松开时，按照顺时针旋转。 　　本程序要求使用定时器中断来实现，不准使用程序延时的方式。(The MCS-51 program is programmed to rotate the stepper motor according to the specified speed and direction, and the number of steps that have been rotated is displayed on the digital tube. Stepper motor speed is divided into two gears. When the S1 switch is pressed, the speed is accelerated from 10 rpm to 60 rpm. When the switch is loosened, the speed will be reduced to 10 rpm. When pressing the S2 switch, rotate counterclockwise; when loosening, rotate clockwise. This procedure requires the use of timer interrupt to achieve, do not use the way of program delay.)

按键判断 进行行扫描m表示对应的行数 n表示对应的列数 对应数值亮(Judgment keystroke scan lines express the corresponding m number of rows n that corresponds to the number of rows corresponding numerical Liang)