说明：  一个nios2和flash的检测程序，主要用于检测基于nios2处理器的板上设备，如RAM、FLASH、UART等。flash程序主要提供对板上FLASH设备的检测、擦除、修改、读和写。
(a flash and the detection procedure, based primarily used to detect nios2 processor board equipment, such as RAM, FLASH, such as UART. Flash procedures for the main board FLASH device detection and erasure, modify, read and write.)