4.2. Device Tree Overlay Supportο
This application note contains steps to configure Device Tree Overlays (DTBO). DTBOs can be enabled from U-Boot when extra peripherals are connected to the board.
Attention
DTBOs are board specific.
Itβs possible to change the dtbo_index from the U-Boot shell.
For example:
=> env set dtbo_index 1
=> saveenv
=> reset
To enable multiple DTBOs, pass a space-separated index list. For example:
=> env set dtbo_index '1 2'
When using the the experimental 2024.04 U-Boot set the adtbo_idx variable instead:
=> env set adtbo_idx 1
=> saveenv
=> reset
Warning
With the experimental 2024.04 U-Boot, multiple DTBOs are not supported.
The following Device-Tree Overlays are supported:
Index |
Description |
|---|---|
0 |
HDMI audio output (bridge by shorting a (J24) header on the board.) |
1 |
Digilent PCam 5C OV5640 Camera |
2 |
TEVI-OV5640C-S84-IR-RPI Camera |
4 |
Enable MAIN and MCU GPIO + CANUART wakeup source |
9 |
4x MCAN interfaces (requires external CAN transceivers) |
10 |
Microtips Technology USA 10.1β WUXGA (1920x1200) OLDI panel |
12 |
M.2-CC3301 WiFi board on the M.2 connector |