I recently got an Arduino nano and a micro SD card reader module and I’m wondering if you can have an SD card boot loader (So when I plug in the SD card it boots from that not the onboard flash) and another piece of software (example: game) on it at the same time. Any help would be great.
ATmega328P (uC installed in Nano) can't execute programs directly from external memory.
I think it is not impossible to below steps.
- Dedicated bootloader run.
- Read the program file from the SD card.
- Write it to flash rom by itself.
- Self reset and execute it.
But the I think that hard to coding and capacity of flash will be severe.
You can check how it is done on the Arduboy FX and try to do something similar.
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