In the ffuart.tar.gz it has one file. The serial.c is the source codes of the FFUART as a console port, it should be put into the directory: /usr/src/linux/drivers/char/, and be compiled into the kernel.

个人根据海德汉平面光栅Windows下的程序编写得Linux下的驱动程去源码，在Linux实时内核下使用，部分驱动内容需要RTAI不定才能使用！-individuals under HEIDENHAIN plane grating Windows programmers in the Linux source code to drive way in the Linux kernel using real-time, part-driven content RTAI volatility can

linux最原始最精致的内核源码，对于想进入linux世界的新手来说是个不错的入门点。-linux kernel source code.