micro SD card slot & SPI

[sand willow]

so, for my current project i am using an itsybitsy m4 together with a 2.0" tft display which has a microSD card slot on the board as well. now, the problem is that when the display is installed, the microSD slot on the display won't be accessible from the outside which i'd need it to be. but since the display is alread connected to the SPI i can't also connect a microSD breakout there too. what can i do?

[weary grove]

There is an SD Chip select pin all all the display breakouts so you can write/read to/from it. As for being accessible outside like as a mounted drive.. that might be hard. What kind of data are you trying to get to and from it?

I think mostly it was for storing images

[sand willow]

is there a way to connect both the display as well as a separate sd card breakout

[weary grove]

Yeah, absolutely.

[sand willow]

oooo how would one do that?

[weary grove]

You’d just connected on the same SPI line and use a separate chip select pin

[sand willow]

the sd card would have to be accessible from outside to travel between the device and my laptop for loading code

[weary grove]

Just make sure you never write to the display at the same time that you write to the SD card otherwise you might corrupt the sd card data

[sand willow]

hmmm

i'll try to read up on that and how to do it

[weary grove]

Some devices have multiple spi buses that you could use

[sand willow]

the itsybitsy m4 only has one iirc