SpiNandFlash的支持

[hfc108]

在某些应用里面，对大容量文件系统存储有要求，但SD卡稳定性并不高。Spi Nand Flash 封装小容量可达到1Gb~4Gb，ESP32有没有计划对该类存储支持？

[ESP_Sprite]

At the moment, we do not support this type of flash in hardware or in the SDK. You can, however, connect it to the ESP32 as a generic SPI device and use the SPI driver to talk to it.

[hfc108]

谢谢回复！我们也在考虑根据通过Nor Flash进行容量扩展，根据esp32的技术手册标明，片外存储器最大支持16MB。是否确认，外部接的SPI Nor Flash最大只能支持到16MB,超过16MB部分就无法当做数据存储使用？

[ESP_Sprite]

At the moment, with the current firmware, I doubt that adding more than 16MiB is going to work: addressing changes a bit on bigger parts, also we cannot use memory mapping to read the extra data. If you do want this, feel free to create an issue on our issue tracker (https://github.com/espressif/esp-idf/issues) and we will see if we can accommodate this in the software. As a quick solution, however, I'd say using a 2nd flash chip will be easier.