About IMX8M mini evk board .....OK,now,I have made Image 、flash.bin 、.dtb and rootfs by myself。I also get a .sdcard Image from yocto,like :core-image-minimal-imx8mmevk.sdcard. how can i make a .sdcard image by myself?
You can refer to the meta layer which is generating the ".sdcard" image". Please refer to the file "../sources/meta-fsl-bsp-release/imx/meta-bsp/classes/image_types_fsl.bbclass" , the function "generate_imx_sdcard" will be used to generate the sdcard image. You can follow those steps to manually generate the sdcard image.
Regards,
Kunal