1. The measuring range is 0~100cm; 2. No display is required; 3. When the measured distance is less than 20cm, the P1.0 port of the 51 single-chip microcomputer outputs 0; when the measured distance i...
There are many methods for building Xilinx simulation library for ModelSim SE. I have searched on the Internet and have tried several of them. One of the simpler methods is as follows: 1) Of course, y...
I need a virtual serial port driver for Windows 2000\XP. The requirement is to create two virtual serial ports, such as COM3 and COM4, and connect them inside the driver. That is, if I write data on C...