这是i Button这种信息纽扣所采用的1线通讯方式的完整源程序。...

基于c51开发的串口通讯程序。方便c51和电脑通讯-Developed based on the C51 serial communication program. C51 and computers to facilitate communication

用可调电阻调节电压值作为模拟温度的输入量，当温度低于30℃时，发出长嘀报警声和光报警，当温度高于60℃时，发出短嘀报警声和光报警。测量的温度范围在0－99℃。-Adjustable voltage regulator with resistance values of the input analog temperature, when the temperature is below 30 ℃, the issue of longalarm sound and light alarm, when the temperature is higher than 60 ℃, short issuedalarm sound and light alarm. Measurement of the temperature range of 0-99 ℃.

自己写的1621驱动程序（绝对可以用的，针对NEC单片机的）-Write your own 1621 driver (certainly we can use for NEC MCU)

这是一个波形选择菜单，通过开发板上的按键，选择波形，幅度，频率的等各参数，然后发送给下位机。让其产生需要的波形。-This is a waveform selection menu, through the development of on-board buttons, select the waveform, amplitude, frequency and other parameters, and then sent to the next bit plane. The need to generate the waveform.

十五路遥控接收板-15 road remote control receiver

RS-485接口具有较强的抗干扰性，数据传输的距离较远，在一些应用中常常需要把RS-232标准的信号转换为RS-485的标准信号进传输。图中所示电路允许数据在RS-232/RS-485这两个不兼容的串行数据接口间传递。传输速度为480波特时，传输距离可达1750米。图中双RS-232收发器IC1将主机(PC)输出的RS-232电平转换为TTL电平，驱动高速RS-485收发器IC2 的输入，倒相器使IC2、IC3在受到起始位时被激活。-RS-485 trying to lay all the thoroughly bleed at the nose picking up the birthday 扰 fern cavity 强 ， Chu Huai basin cavity beat escapement for the birthday candle远Now ， Which instance, using Beckmannia中

用keil51开发的7219程序实现led显示-7219 with the development of procedures keil51 realize led display

1.通过键盘、LCD来进行超低功耗实验 2 在一段时间内，如果用户没有进行按键操作，系统将进入“睡眠”－－低功耗状态 3 用户按键后，系统从低功耗状态转到正常的工作状态 4 在非低功耗状态下，程序接收键盘按键执行加法器操作(因为键盘和LCD限制不能实现复杂 5 的功能,如乘法、减法、除法等）.-1. Through the keyboard, LCD for ultra low-power experiment 2 over a period of time, if the user does not have keys to the operation, the system will enter a " sleep" - low-power status 3 users button, the system switch from the low-power state to normal working condition 4 in the non-low-power state, the implementation of procedures to receive the keyboard keys adder operation (because the keyboard and the LCD can not limit the complexity of the functions of 5, such as multiplication, subtraction, division, etc.).

SD2000时钟芯片读写程序-SD2000 clock chip to read and write procedures

W78e58读写iButton的源程序，应用于电子门锁的完整程序-W78e58 iButton read and write the source code used in electronic locks integrity procedures