I have an SD card in a camera. I want to use a controller to work the camera. The construction of the camera doesn't lend itself to just putting a scope on the SD card while it is working.
What I would like is some way to tell the controller that the picture the camera just finished taking is in memory and it is OK to shut off the camera. Is there some handshaking line that I could use to tell when the card is being accessed and when it is just sitting there waiting?