Simplest way to read two SD cards?

Projects Programming
1

Hi all,

I am planning on using a TFT screen with an onboard SD card read/writer to display images, and I want to have a separate SD card reader/writer that will be written to with data.

I see there are a few ways to use two SD card readers/writers at the same time, but what would be the simplest and most reliable way?

Thanks, Zeb

2

Is the TFT able to read the SD-card itself?

What will be "easiest" depends on the microcontroller. Some microcontrollers have multiple hardware-SPI-interfaces
or even hardware 4bit SDIO-mode like the teensy 4.0 teensy 4.1

The SD-library can handle cards up to many gigaBytes and can read / write multiple files. So what is the special reason to use two SD-cards?

best regards Stefan

3

Just use separate pins for the chip select. Be careful, some SD card adapters for the arduino do not properly release the MISO line when not selected.

4

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