Accessing SD Card with MSC example

[hamster]

Howdy,

I'm trying to access the SD card on my device via the usb MSC and am not sure the best way to proceed.

I have a custom board with an nrf52840, and it works great for chip access to the SD card - I can place files on the SD card via an external reader from a PC, and then access those files from code.

I configured the usbd_msc example to use the SD card and the correct pins that are working in my app, but I see no accesses to the SD card via logic analyzer.  Windows shows a SDC drive present, but I get a 'please insert a disk' error. 

Is there additional steps required, or am I missing something here?  My goal is to be able to mount the SD card via USB and read and write to it.  I understand I cannot access it from the user app at the same time, which is fine - I'm currently just trying to get access to it at all via this path.

Thanks!

[Einar Thorsrud]

Hi,

I don't recall seeing a "please insert a disk" error earlier. Have you tried with the USB MSC SDK example, just adapted to your board (changes in pin configuration, etc.)?

[hamster]

Yes, I took the example wholesale, changed only the pins and enabled the SD card. The ram filesystem works, but not the SD card. 

[David Cerrone]

Hi Hamster,

I'm trying to do something similar. How are you going about transferring the files to RAM and then reading them on through code?

Thanks