详细介绍PIC单片机使用SPI方式与IC卡进行数据传输的原理和电路设计，以及使用USART方式与PC机进行串行异步通信的工作原理；介绍PIC单片机听SPI方式和USART方式的设置方法。-PIC detailed the use of SPI with Single-chip IC card for data transmission principles and circuit design, as well as with the PC using USART serial asynchro

提出了一种用C语言实现PC机串行通信的方法,分析了PC机串行通信原理,采用计算机自身携带的 RS-232C标准接口进行通信。该方法程序小,硬件连接简单,且可应用到PC机与单片机或其它仪器仪表的 串行通信中去,因此具有较广的使用价值 -A method of computer serial communication is proposed in the paper. The data is trans- ferred between twoCOM portswith theAsy

基于单片机的超声波测距仪的原理结构图的介绍-Based on the introduction of the principle structure of SCM ultrasonic range finder

实现串口通信。适合于单片机入门新手学习串口通信，理解原理之用-Serial communications. Suitable for single-chip serial communication entry for novices to learn, understand the principles of use