How to Update U-Boot on Warp7 board
----------------------------------
Required software on the host PC:
- imx_usb_loader: https://github.com/boundarydevices/imx_usb_loader
- dfu-util: http://dfu-util.sourceforge.net/releases/ (if you are in a
Debian distribution then you can get it via libdfu-dev package)
- libusb: http://libusb.org/ (if you are in a Debian distribution
then you can get it via libusb-dev and libusb-1.0-0-dev)
In U-Boot folder, build U-Boot for Warp7:
$ make mrproper
$ make warp7_config
$ make
This will generate the U-Boot binary called u-boot.imx.
Put warp7 board in USB download mode:
Remove the CPU board from the base board then put switch 2 in the upper
position
Connect a USB to serial adapter between the host PC and warp7
Connect a USB cable between the OTG warp7 port and the host PC
Copy u-boot.imx to the imx_usb_loader folder.
Load u-boot.imx via USB:
$ sudo ./imx_usb u-boot.imx
Then U-Boot should start and its messages will appear in the console program.
Open a terminal program such as minicom
Use the default environment variables:
=> env default -f -a
=> saveenv
Run the DFU command:
=> dfu 0 mmc 0
Transfer u-boot.imx that will be flashed into the eMMC:
$ sudo dfu-util -D u-boot.imx -a boot
Then on the U-Boot prompt the following message should be seen after a
successful upgrade:
#DOWNLOAD ... OK
Ctrl+C to exit ...
Remove power from the warp7 board.
Put warp7 board into normal boot mode (put the switch 2 in the lower position)
Power up the board and the new updated U-Boot should boot from eMMC
a2accd843b