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README

      1 How to Update U-Boot on Warp7 board
      2 ----------------------------------
      3 
      4 Required software on the host PC:
      5 
      6 - imx_usb_loader: https://github.com/boundarydevices/imx_usb_loader
      7 
      8 - dfu-util: http://dfu-util.sourceforge.net/releases/ (if you are in a
      9 Debian distribution then you can get it via libdfu-dev package)
     10 
     11 - libusb: http://libusb.org/ (if you are in a Debian distribution
     12 then you can get it via libusb-dev and libusb-1.0-0-dev)
     13 
     14 In U-Boot folder, build U-Boot for Warp7:
     15 
     16 $ make mrproper
     17 $ make warp7_config
     18 $ make
     19 
     20 This will generate the U-Boot binary called u-boot.imx.
     21 
     22 Put warp7 board in USB download mode: 
     23 
     24 Remove the CPU board from the base board then put switch 2 in the upper
     25 position
     26 
     27 Connect a USB to serial adapter between the host PC and warp7
     28 
     29 Connect a USB cable between the OTG warp7 port and the host PC
     30 
     31 Copy u-boot.imx to the imx_usb_loader folder.
     32 
     33 Load u-boot.imx via USB:
     34 
     35 $ sudo ./imx_usb u-boot.imx
     36 
     37 Then U-Boot should start and its messages will appear in the console program.
     38 
     39 Open a terminal program such as minicom
     40 
     41 Use the default environment variables:
     42 
     43 => env default -f -a
     44 => saveenv
     45 
     46 Run the DFU command:
     47 => dfu 0 mmc 0
     48 
     49 Transfer u-boot.imx that will be flashed into the eMMC:
     50 
     51 $ sudo dfu-util -D u-boot.imx -a boot
     52 
     53 Then on the U-Boot prompt the following message should be seen after a
     54 successful upgrade:
     55 
     56 #DOWNLOAD ... OK
     57 Ctrl+C to exit ...
     58 
     59 Remove power from the warp7 board.
     60 
     61 Put warp7 board into normal boot mode (put the switch 2 in the lower position)
     62 
     63 Power up the board and the new updated U-Boot should boot from eMMC
     64