16C954driveCode

代码说明：

  16C954芯片，是一个能够执行串口扩展的芯片，利用该芯片，最多能扩展出4个串口，解决了一般性单片机串口不够用的问题。该源码提供了16C954驱动，利用此驱动，可以快速扩展其他串口功能。(16C954 chip, is capable of performing a serial port expansion chip, using the chip, up to four serial ports can be extended out to solve the general problem of single-chip serial enough. The source provides the 16C954 driver, the use of this driver, you can quickly expand to other serial port functions.)