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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / 978138fab825f9af96ca44d2b64193c6cd536623 / . / board / technexion / pico-imx6ul / README
blob: 66dc977d49268f49a4ebbdb2a8e1a6070f8489e2 [file] [log] [blame]
Vanessa Maegimadab14932016-06-15 12:48:15 -0300[diff] [blame]1How to Update U-Boot on Pico-imx6ul board
2-----------------------------------------
3
4Required 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
10Build U-Boot for Pico:
11
12$ make mrproper
13$ make pico-imx6ul_defconfig
14$ make
15
Fabio Estevamc97c9e02018-09-04 10:23:13 -0300[diff] [blame]16This generates the SPL and u-boot.img binaries.
17
181. Loading U-Boot via USB Serial Download Protocol
19
20Note: This method is convenient for development purposes.
21If the eMMC has already a U-Boot flashed with DFU support then
22the user can go to step 2 below in order to update U-Boot.
Vanessa Maegimadab14932016-06-15 12:48:15 -0300[diff] [blame]23
24Put pico board in USB download mode (refer to the document
Otavio Salvador978138f2018-09-04 10:23:17 -0300[diff] [blame^]25http://www.wandboard.org/images/hobbit/hobbitboard-imx6ul-reva1.pdf
26page 15).
Vanessa Maegimadab14932016-06-15 12:48:15 -0300[diff] [blame]27
Otavio Salvador978138f2018-09-04 10:23:17 -0300[diff] [blame^]28Connect a USB to serial adapter between the host PC and pico.
Vanessa Maegimadab14932016-06-15 12:48:15 -0300[diff] [blame]29
Otavio Salvador978138f2018-09-04 10:23:17 -0300[diff] [blame^]30Connect a USB cable between the OTG pico port and the host PC.
Vanessa Maegimadab14932016-06-15 12:48:15 -0300[diff] [blame]31
Otavio Salvador978138f2018-09-04 10:23:17 -0300[diff] [blame^]32Open a terminal program such as minicom.
Vanessa Maegimadab14932016-06-15 12:48:15 -0300[diff] [blame]33
Fabio Estevamc97c9e02018-09-04 10:23:13 -0300[diff] [blame]34Copy SPL and u-boot.img to the imx_usb_loader folder.
Vanessa Maegimadab14932016-06-15 12:48:15 -0300[diff] [blame]35
Fabio Estevamc97c9e02018-09-04 10:23:13 -0300[diff] [blame]36Load the SPL binary via USB:
Vanessa Maegimadab14932016-06-15 12:48:15 -0300[diff] [blame]37
Fabio Estevamc97c9e02018-09-04 10:23:13 -0300[diff] [blame]38$ sudo ./imx_usb SPL
39
40Load the u-boot.img binary via USB:
41
42$ sudo ./imx_usb u-boot.img
Vanessa Maegimadab14932016-06-15 12:48:15 -0300[diff] [blame]43
Otavio Salvador978138f2018-09-04 10:23:17 -0300[diff] [blame^]44Then U-Boot starts and its messages appear in the console program.
Vanessa Maegimadab14932016-06-15 12:48:15 -0300[diff] [blame]45
46Use the default environment variables:
47
48=> env default -f -a
49=> saveenv
50
Fabio Estevamc97c9e02018-09-04 10:23:13 -0300[diff] [blame]512. Flashing U-Boot into the eMMC
52
Otavio Salvador978138f2018-09-04 10:23:17 -0300[diff] [blame^]53Run the DFU agent so we can flash the new images using dfu-util tool:
54
Vanessa Maegimadab14932016-06-15 12:48:15 -0300[diff] [blame]55=> dfu 0 mmc 0
56
Fabio Estevamc97c9e02018-09-04 10:23:13 -0300[diff] [blame]57Flash SPL and u-boot.img into the eMMC running the following commands on a PC:
Vanessa Maegimadab14932016-06-15 12:48:15 -0300[diff] [blame]58
Fabio Estevamc97c9e02018-09-04 10:23:13 -0300[diff] [blame]59$ sudo dfu-util -D SPL -a spl
60
61$ sudo dfu-util -D u-boot.img -a u-boot
Vanessa Maegimadab14932016-06-15 12:48:15 -0300[diff] [blame]62
Vanessa Maegimadab14932016-06-15 12:48:15 -0300[diff] [blame]63Remove power from the pico board.
64
Otavio Salvador978138f2018-09-04 10:23:17 -0300[diff] [blame^]65Put pico board into normal boot mode.
Vanessa Maegimadab14932016-06-15 12:48:15 -0300[diff] [blame]66
67Power up the board and the new updated U-Boot should boot from eMMC.