Below command to add u-boot to image you built from GitHub

   $ sudo dd conv=notrunc if=<Path to u-boot binary> of=core-image-weston-imx6-lec-imx6-1-*.sdcard bs=512 seek=2
   $ sync

Below command to flash the image (u-boot + kernel + rootfs) to SD Card

$ sudo dd if=core-image-weston-imx6-*.sdcard of=/dev/sdX bs=64M
$ sync

• LEC-IMX6
  
  • Quad/Dual SoC 1G | 2G
    
  • Solo/Dual Lite SoC 1G | 2G
    

• LEC-IMX6
  
  • Quad/Dual SoC 1G | 2G
    
  • Solo/Dual Lite SoC 1G | 2G
    

1. Insert SD Card into your host machine and power on your target device to boot from SD card. Make sure boot switch setting is set for carrier SD card

2. Please boot to u-boot stage and configure the booting setting with the below command:

   U-Boot> setenv boot_sd LOAD=\'ext2load mmc 1:2\'\; BOOTARGS=\'mmcblk1p2 ro\'\; run boot
   U-Boot> saveenv
   U-Boot> reset

It supports several boot devices on LEC-BASE 2.0 and LEC BASE R1 carrier board .

• For LEC-BASE 2.0 carrier board: selection of a specific boot device is defined by the switches (SW39), as follows:

  boot device	SW1	SW2	SW3	SW4
  Carrier SD Card	OFF	ON	ON	OFF

• For LEC BASE R1 carrier board: selection of a specific boot device is defined by the Jumpers (JP16, JP17, JP18, JP19 ), as follows:

  

then, power on your target device and the booting message will be present from the UART console or HDMI display