用c实现的列车运行情况记录程序，包括gps，键盘，lcd，gprs-train condition recorder by c language，to realise gps，key，lcd and gprs

lcd12864+jianpan 可通过键盘输入在液晶上显示-lcd12864+ jianpan keyboard input via the LCD display

键盘输入数字，用LCD实现显示，C语言编程，简单实用，-The number of keyboard input, to achieve with LCD display, C language programming, simple and practical,

FPGA的设计键盘LCD显示的波动开关层序详细功能、包含内容说明v-LCD

采用c语言完成了超声波通信系统，通过采用半双工的收发模式，实现两个超声波系统的收发，采用键盘模式发送短信或者字符，通过液晶显示发送端和接收端是否一样-C language using ultrasonic communication system is completed through the use of half-duplex transceiver mode, both send and receive ultrasound system to send text messages us