ODroid: how erase android and install HA?

Hi, I bought an ODroid N2+ and an eMMC card where android is installed. I need somehow to format the eMMC card via ODroid so I can load HA there, as I don’t have an eMMC to USB/MicroSD reader. When I turn it on in SPI mode, it says “cant access tty: job control turned off”.
Do you have any advice?