C51 for the Modbus protocol, the tests will be run, but still not perfect

超声波测距 利用 送接受的时间 差计算得到距离-Ultrasonic Ranging acceptable use to send the time difference calculated by the distance

CC1100射频电路的线路板和已经调通的源码-CC1100 RF circuit and the circuit board s source code has been transferred

X5045 C51读写程序-X5045 C51 literacy procedures

一般机箱的51单片机温控程序设计，程序较长，在关键部分做了注释。-51 single-chip general chassis temperature control program design, procedures longer to do the key part of the Notes.

数码管的显示操作，同时也有按键操作程序，通过单片机控制可以直接进行显示-Digital tube display operation, but also has key operating procedures, can be directly controlled through the single-chip display

spi prog for mcu ok in keil C

这是凌阳公司温度传感器的源代码，注有非常详细的代码注释。-This is a temperature sensor Sunplus company

常用数据库包（pcb）组件。。。。。。。。。。。。。。。。。。

键盘的驱动，c代码，给嵌入式用的，可以拿来自己研究用，比较不错。大家多交流-Keyboard driver, c code for embedded use, and can use their own research, a good comparison. Members will exchange