作者倾力编写的简易计算器程序,可实现八位数的加减乘除功能。显示和键扫描部分是参考他人的著作。-Author effort to prepare a simple calculator program to realize the number of addition and subtraction, multiplication and division of eight features. Display and key scanning is a reference book to others.
这个文件是nios在linux操作系统下的uart设备的驱动,这个驱动可以支持4个uart设备。-This file is nios in the linux operating system of the uart device driver, the driver can support 4 uart devices.