Date
Owner
Revision
Notes
Josua Mayer
1
Initial release
Table of Contents
The HummingBoard IIoT supports both MIPI-DSI and LVDS displays.
Instructions are provided below for particular supported panels.
Date | Owner | Revision | Notes |
|---|---|---|---|
| Josua Mayer | 1 | Initial release |
Table of Contents | |||
Winstar WJ70N3TYJHMNG0 (DSI): imx8mp-hummingboard-iiot-panel-dsi-WJ70N3TYJHMNG0.dtbo
Winstar WF70A8SYJHLNGA (LVDS):imx8mp-hummingboard-iiot-panel-lvds-WF70A8SYJHLNGA.dtso
Note: The DSI panel is sold part of “HummingBoard i.MX8M IIOT” Evaluation Kits, for separate availability contact sales@solid-run.com.
Note: The DSI panel is sold part of “HummingBoard i.MX8M IIOT” Evaluation Kits, for separate availability contact sales@solid-run.com.
Note: Using both DSI and LVDS panels at the same time leads to various software issues and is not recommended.
Note: Using both DSI and LVDS panels at the same time leads to various software issues and is not recommended.
On HummingBoard-IIoT supported panels are enabled by DeviceTree Overlays.
Edit file extlinux.conf on the first partition of the board adding the line starting with “FDTOVERLAYS” - either from a PC, or from the device serial console, then reboot. The resulting file should look similar to the example below (line 5 is the important addition, substitute the filename based on actual panel from the list above):
default Yocto label Yocto kernel /Image fdtdir / FDTOVERLAYS ../freescale/imx8mp-hummingboard-iiot-panel-dsi-WJ70N3TYJHMNG0.dtbo append root=PARTUUID=076c4a2a-02 rootwait |
Note: Note the FDTOVERLAYS line can be extended with additional overlays e.g. for adding cameras.
Note: Note the FDTOVERLAYS line can be extended with additional overlays e.g. for adding cameras.
Note: Enabling both DSI and LVDS panel overlays at the same time leads to various software issues and is not recommended.
Note: Enabling both DSI and LVDS panel overlays at the same time leads to various software issues and is not recommended.
For editing on device can use nano text editor:
mount /dev/mmcblk1p1 /boot nano /boot/extlinux/extlinux.conf # save with ctrl+o, exit with ctrl+x sync reboot |
Carefully review the connections shown below, wrong orientation of cable may damage the panel.
LVDS panel is connected to J25 on the HB-IIoT (same side of PCB as SoM and M.2 connectors). The cable used should expose contacts at the upper side of the panel, facing away from the PCB. The connector on HB-IIoT supports contacts on either side.
LVDS panel is connected to J24 on the HB-IIoT (same side of PCB as USB and Ethernet connectors). The cable used should expose contacts at the upper side of the panel, facing away from the PCB. The connector on HB-IIoT supports contacts on either side.
