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Diffstat (limited to 'doc/board/ti/am62x_sk.rst')
| -rw-r--r-- | doc/board/ti/am62x_sk.rst | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/doc/board/ti/am62x_sk.rst b/doc/board/ti/am62x_sk.rst index b12dc85..d5f7fe3 100644 --- a/doc/board/ti/am62x_sk.rst +++ b/doc/board/ti/am62x_sk.rst @@ -109,6 +109,20 @@ Set the variables corresponding to this platform: :start-after: .. k3_rst_include_start_build_steps_spl_r5 :end-before: .. k3_rst_include_end_build_steps_spl_r5 +* 3.1.1 Alternative build of R5 for DFU boot: + +As the SPL size can get too big when building with support for booting both +from local storage *and* DFU an extra config fragment should be used to enable +DFU support (and disable storage support) + +.. prompt:: bash $ + + export UBOOT_CFG_CORTEXR="${UBOOT_CFG_CORTEXR} am62x_r5_usbdfu.config" + +.. include:: ../ti/k3.rst + :start-after: .. k3_rst_include_start_build_steps_spl_r5 + :end-before: .. k3_rst_include_end_build_steps_spl_r5 + * 3.2 A53: .. include:: ../ti/k3.rst @@ -251,6 +265,29 @@ https://www.ti.com/lit/pdf/spruiv7 under the `Boot Mode Pins` section. For SW2 and SW1, the switch state in the "ON" position = 1. +DFU based boot +-------------- + +To boot the board over DFU, set the switches to DFU mode and connect to the +USB type C DRD port on the board. After power-on the build artifacts needs to be +uploaded one by one with a tool like dfu-util. + +.. am62x_evm_rst_include_start_dfu_boot + +The initial ROM will have a DFU alt named `bootloader` for the initial R5 spl +upload. The next stages as exposed by U-Boot have target alts matching the name +of the artifacts, for these a USB reset has to be done after each upload. + +When using dfu-util the following commands can be used to boot to a U-Boot shell: + +.. prompt:: bash $ + + dfu-util -a bootloader -D tiboot3.bin + dfu-util -R -a tispl -D tispl.bin + dfu-util -R -a u-boot.img -D u-boot.img + +.. am62x_evm_rst_include_end_dfu_boot + Debugging U-Boot ---------------- |