SD Card Image

I am trying to create an image in openembedded similar to the hikey-jessie_developer_20151130-387.img. I created an image with 2 partitions, boot (fat32) and rootfs (ext4). My kernel (Image) and device tree are located in the boot partition. When I put the card in the dev board and turn it on it does not boot. I get a message "Fail to start BootNext". I can boot the kernel using the sd card grub option on the eMMC, but not by default. Are there directions on how to create an sd card image like the hikey-jessie_developer_20151130-387.img? -Machon