| Vanessa Maegima | 27142c3 | 2017-05-08 13:17:28 -0300 | [diff] [blame] | 1 | How to update U-Boot on pico-imx7d board |
| 2 | ---------------------------------------- |
| 3 | |
| 4 | Required software on the host PC: |
| 5 | |
| 6 | - imx_usb_loader: https://github.com/boundarydevices/imx_usb_loader |
| 7 | |
| 8 | Build U-Boot for pico: |
| 9 | |
| 10 | $ make mrproper |
| 11 | $ make pico-imx7d_defconfig |
| 12 | $ make |
| 13 | |
| 14 | This generates the U-Boot binary called u-boot.imx. |
| 15 | |
| 16 | Put pico board in USB download mode (refer to the PICO-iMX7D Quick Start Guide |
| 17 | page 3) |
| 18 | |
| 19 | Connect a USB to serial adapter between the host PC and pico. |
| 20 | |
| 21 | Connect a USB cable between the OTG pico port and the host PC. |
| 22 | |
| 23 | Open a terminal program such as minicom. |
| 24 | |
| 25 | Copy u-boot.imx to the imx_usb_loader folder. |
| 26 | |
| 27 | Load u-boot.imx via USB: |
| 28 | |
| 29 | $ sudo ./imx_usb u-boot.imx |
| 30 | |
| 31 | Then U-Boot starts and its messages appear in the console program. |
| 32 | |
| 33 | Use the default environment variables: |
| 34 | |
| 35 | => env default -f -a |
| 36 | => saveenv |
| 37 | |
| 38 | Run the UMS command: |
| 39 | => ums 0 mmc 0 |
| 40 | |
| 41 | Transfer u-boot.imx to be flashed into the eMMC: |
| 42 | |
| 43 | $ sudo dd if=u-boot.imx of=/dev/sdX bs=1K seek=1; sync |
| 44 | |
| 45 | Remove power from the pico board. |
| 46 | |
| 47 | Put pico board into normal boot mode. |
| 48 | |
| 49 | Power up the board and the new updated U-Boot should boot from eMMC. |
| Vanessa Maegima | a2c1653 | 2017-08-29 13:53:18 -0300 | [diff] [blame] | 50 | |
| 51 | Building U-Boot to boot with NXP 4.1 kernel: |
| 52 | |
| 53 | The NXP 4.1 kernel boots only in secure boot mode on mx7. |
| 54 | |
| 55 | Follow the next steps to enable secure boot: |
| 56 | |
| 57 | $ make mrproper |
| 58 | $ make pico-imx7d_defconfig |
| 59 | $ make menuconfig |
| 60 | -> ARM architecture |
| 61 | -> [*] Enable support for booting in non-secure mode |
| 62 | -> [*] Boot in secure mode by default |
| 63 | -> Exit |
| 64 | $ make |
| 65 | |
| 66 | Flash u-boot.imx using the imx_usb_loader tool. |