FDS external spi flash

[ypearson]

Can you FDS for an external spi flash device/chip?

[Turnaev]

Ok. Very good! Thank you!

[kxct]

Fds must modify the fds module code to use external flash, because fds will directly read the internal flash data through the data pointer.

[Nguyen Hoan Hoang]

This flash driver here is quite easy to use and works with almost all SPI Flash.  

https://github.com/IOsonata/IOsonata/blob/master/include/diskio_flash.h

usage example

https://github.com/IOsonata/IOsonata/blob/master/exemples/misc/flash_memory_demo.cpp