I have a problem with displaying an image from Yun's(!) SD card to an Arduino TFT.
I know how to display it if a use a TFT's SD slot. But I don't want to use two different SD cards.
I know that I must use a bridge. But I don't know how.
The Arduino TFT library extends the Adafruit GFX, and Adafruit ST7735 libraries that it is based on. The GFX library is responsible for the drawing routines, while the ST7735 library is specific to the screen on the Arduino TFT. The Arduino specific additions were designed to work as similarly to the Processing API as possible. Onboard the screen is a SD card slot, which can be used through the SD library. The TFT library relies on the SPI library for communication with the screen and SD card, and needs to be included in all sketches.