什么是“!!!!顾客意识到，异常!!!”在alt_qspi.h中意味着什么？

SoC硬件库（HWLIB）配置和控制SoC四路串行外设接口（SPI）控制器。 QSPI HWLIB源可以在/ip/altera/hps/altera_hps/hwlib/include/alt_qspi.h文件中找到。 alt_qspi.h文件包含以下注释：

* 1. Qspi Direct Access Mode is not working!
*
* This is because the qspi flash memory installed on our DevKit board, Micro
* part N25Q00xx, 8 Gb, is not completely compatible with our embedded Synopsis
* QSPI controller IP. Therefore there is no viable direct access code offered
* in the lib. All the memory rea/write functionality is offered with indirect
* access only.
*
* Should you install a different flash memory part in your custom board, and
* wondering wether direct access mode works, please contact with us.
******************************************************************************/

该声明只是警告客户，对于多芯片实现，控制器需要读取当前不支持的额外状态标志命令。