| Vanessa Maegima | dab1493 | 2016-06-15 12:48:15 -0300 | [diff] [blame] | 1 | How to Update U-Boot on Pico-imx6ul 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 Pico: |
| 11 | |
| 12 | $ make mrproper |
| 13 | $ make pico-imx6ul_defconfig |
| 14 | $ make |
| 15 | |
| 16 | This will generate the U-Boot binary called u-boot.imx. |
| 17 | |
| 18 | Put pico board in USB download mode (refer to the document |
| 19 | http://www.wandboard.org/images/hobbit/hobbitboard-imx6ul-reva1.pdf page 15) |
| 20 | |
| 21 | Connect a USB to serial adapter between the host PC and pico |
| 22 | |
| 23 | Connect a USB cable between the OTG pico port and the host PC |
| 24 | |
| 25 | Open a terminal program such as minicom |
| 26 | |
| 27 | Copy u-boot.imx to the imx_usb_loader folder. |
| 28 | |
| 29 | Load u-boot.imx via USB: |
| 30 | |
| 31 | $ sudo ./imx_usb u-boot.imx |
| 32 | |
| 33 | Then U-Boot should start and its messages will appear in the console program. |
| 34 | |
| 35 | Use the default environment variables: |
| 36 | |
| 37 | => env default -f -a |
| 38 | => saveenv |
| 39 | |
| 40 | Run the DFU command: |
| 41 | => dfu 0 mmc 0 |
| 42 | |
| 43 | Transfer u-boot.imx that will be flashed into the eMMC: |
| 44 | |
| 45 | $ sudo dfu-util -D u-boot.imx -a boot |
| 46 | |
| 47 | Then on the U-Boot prompt the following message should be seen after a |
| 48 | successful upgrade: |
| 49 | |
| 50 | #DOWNLOAD ... OK |
| 51 | Ctrl+C to exit ... |
| 52 | |
| 53 | Remove power from the pico board. |
| 54 | |
| 55 | Put pico board into normal boot mode |
| 56 | |
| 57 | Power up the board and the new updated U-Boot should boot from eMMC. |