How to flash Debian 12 eMMC image
From ESS-WIKI
Contents
Download prebuild WIC image
Download from Debian12
Prepare a bootable SD card
sudo dd if=${WIC_IMAGE} of=${SD_DEVICE} bs=1M conv=fsync status=progress
Copy image to USB disk
sudo cp ${WIC_IMAGE} ${USBDISK_MOUNTPOINT}
Flash to eMMC
1. SD card boot
2. Insert USB disk and mount
mount /dev/sdx /mnt/
3. Flash image
dd if=/mnt/${WIC_IMAGE} of=/dev/mmcblk2 bs=1M conv=fsync status=progress