IC卡编程使用详细说明，已经根据内容完成了相关设计，并用在了工程中-use elaborate on the content has been completed in accordance with the relevant design and used in the project

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