IC nexus EC2107, User Manual

Page: 10 / 39

User Manual EC 21XX
Page
10
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'
//7” LCD (800 x 480) with RTP