说明：  MCU利用SPI接口，就可以把数据存到FLash存储器AT25F512或AT25F1024中去，本文件给出具体代码，你可以不进行太多的修改，就可以用到你的开发项目中。
(MCU to use SPI interface, you can save the data to FLash Memory AT25F512 or AT25F1024 and going, this document is given a specific code, you can choose not to make too many changes, you can use in your development projects.)