How to load Yocto image into SD card?


I am new into this platform and Im wondering how to flash yocto image into SD card and then boot from the SD card

Thanks in Advance

What platform are you talking about? Please clarify in subject. Assuming this is for cc6ul:
your u-boot needs to be in internal FLASH. You can’t boot entirely of SD card. The rootfs and kernel could be on SD card.
something along those lines should work:
> => setenv mmcroot /dev/mmcblk1p2
> => setenv mmcdev 1
> => dboot linux mmc