1 How to Update U-Boot on Warp 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/ 9 10 Build U-Boot for Warp: 11 12 $ make mrproper 13 $ make warp_config 14 $ make 15 16 This will generate the U-Boot binary called u-boot.imx. 17 18 Put warp board in USB download mode 19 20 Connect a USB to serial adapter between the host PC and warp 21 22 Connect a USB cable between the OTG warp port and the host PC 23 24 Open a terminal program such as minicom 25 26 Copy u-boot.imx to the imx_usb_loader folder. 27 28 Load u-boot.imx via USB: 29 30 $ sudo ./imx_usb u-boot.imx 31 32 Then U-Boot should start and its messages will appear in the console program. 33 34 Use the default environment variables: 35 36 => env default -f -a 37 => saveenv 38 39 Run the DFU command: 40 => dfu 0 mmc 0 41 42 Transfer u-boot.imx that will be flashed into the eMMC: 43 44 $ sudo dfu-util -D u-boot.imx -a boot 45 46 Then on the U-Boot prompt the following message should be seen after a 47 successful upgrade: 48 49 #DOWNLOAD ... OK 50 Ctrl+C to exit ... 51 52 Remove power from the warp board. 53 54 Put warp board into normal boot mode 55 56 Power up the board and the new updated U-Boot should boot from eMMC 57
