USB接口转换成RS232接口驱动程序，通过串口——USB线即可实现通信-USB interface into RS232 interface driver, through serial port -- USB cable communication can be realized

PPC40x的串口驱动，调用LINUX环境的几个常见函数，可填加到UBOOT-PPC40x serial driver, call a few LINUX environment common functions can be added to fill UBOOT

主要讲解了Linux 操作串口的架构。 添加串口硬件时，首先通过驱动程序，采集串口当中的数据，内核通过提供read、write 、select、open、close 供应用程序调用，在设计串口通信类，就是对这几个函数的运用。 -Mainly on the architecture of the Linux operating serial. Add serial hardware driver, collecting serial data which the kernel by p

调用Linux下串口驱动的API，如打开串口，读、写串口等，可以在Linux下用GCC进行编译，并执行。 每个函数均有详细的中文注释。-Call the serial driver under Linux API, such as open the serial port, read and write serial port, etc., can be compiled under Linux with GCC, and implementation. Each function has a