at my day job I'm an application level developer, but I have an idea that I would like to prototype thats a bit more on the microcontroller side.
Basically I want to be be able to display some static images on 4 (although the ability to expand would be nice) 2-4 inch color screens such as TFT or OLED. as far as I can tell, displays that have onboard controllers that implement the SPI are ideal. Seems like my limitations there are low refresh rates.. but I can live with around 5 fps. and play a short sound clip on a button press. Not sure what else is out there and really don't want to write my own drivers if I can avoid it.
my big problem is the controller. The ones i've looked into seem to have 1 or 2 sets of dedicated SPI pins. I know SPI is a 1 controller, multiple devices scheme, but that still seems limited by the number of selector pins. I've never designed a project from scratch like this, and I'd love some help getting started. I can barely find examples of people using 2 displays with Raspberry Pis. I'm not sold on Pi or arduino, I'm just fammilliar with them. Any other userfriendly ish MCU would work great.
If theres a better way to connect, or a better microcontroller to use I'd love to know.