SPIFFS 全称是SPI Flash File System，用于SPI读写flash的文件系统，其实也可用于NOR flash SPIFFS 文件系统用于嵌入式平台的 SPI NOR flash设备，同样适用于MCU内部的falsh(SPIFFS full name is SPI Flash File System, for SPI read and write flash file system, in fact, can also be used for NOR flash The