IC nexus EC21 Series, Быстрый старт

Страница: 14 / 43

Quick Start Guide SBC21/NSD21/EC 21
Page
14
3.2 Start Running
After connecting to the debug port, please power on the device to start.
1. Before logging into the system, you can enter into the U-Boot environment to
check some variables. After powering on, quickly hit the Enter key within 3
seconds when you see the message below.
Hit any key to stop autoboot: 3
2. Type
‘?’
or
‘help’
to get all U-Boot commands and more details.
3. Type printev on the U-Boot shell to see the current environmental variables
> printenv
4. Use the command below to modify an environment variable.
> setenv variable ' string value '
If you need to change your output display, do the following command to set the
variable
“panel”
; otherwise, we do not recommend you doing this step.
 Android
//HDMI (1920 x 1080)
> setenv panel 'video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24,bpp=32 video=mxcfb1:off
cea'
//7” LCD-PT (800 x 480) with RTP
> setenv panel
'video=mxcfb0:dev=lcd,LCD-WVGA,if=RGB24,bpp=32 video=mxcfb1:off'
//7” LCD-AWT (800 x 480) with RTP
> setenv panel
'video=mxcfb0:dev=lcd,AWT-WVGA,if=RGB24,bpp=32 video=mxcfb1:off'

Ubuntu
//HDMI (1920 x 1080)
> setenv panel
'video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24 video=mxcfb1:off'