2019-06-17 06:17 AM
Hi
I like to use my small mcu system (stm32f401 with 4bit SDIO and USB-Device) in the follow way:
If USB is plugged in -> the system should behave like a msd on a windows machine.
If USB is not plugged in -> the system should read the files from the sd-card via fatfs and use the files localy.
I know, msd and fatfs at the same time is not possible, but switching between them at runtime should be possible. has anyone done this bevor? and examples to share?
cheers Claudio