Linux rk3188 3.0.36+ #285 SMP PREEMPT Thu Apr 2 15:42:33 EEST 2015 armv7l
-bash: ./change_display.sh: No such file or directory
Isn't that for A20, such as LIME?
Look at the first line. It is for rk3188 SOM EVB.
As it was said in manual - look at page 18
Today I've tried command xrandr, and received such output:
olimex@rk3188:~$ xrandr --size 1280x1024
Can't open display
So as a result at present moment, I can't connect my RK3188-SOM-EVB-4G to any monitor that I have.
I have Samsung 940N with native resolution 1280x1024x50Hz, Asus - 1400x900, Benq 1920x1280x50Hz and two laptops. For connection to them, I'm using hdmi- vga converter. And I'm sure it is all right, it works perfectly with Raspberry (that have less MIPS, as olimex said in bucklet)
The manual says:
In case you need a custom video output resolution you would need to edit the kernel. There are no
configuration files that can be easily edited to achieve the desired video output.
But I can't find any clue what commands I should use for that.
is nothing about it.
Wow, that's odd.
What does ls show?
Also, try such as
find -name 'change*sh'
I've tried as you said, and it works.
First of all system found ./change_display.sh and then I could use this command
//seems strange for me
; but Thx a lot, this was helpful
BUT now after this operation I encountered the next trouble.
My debug UART listens for my commands, but I cannot receive no visible response from debug UART. My board implement such commands as 'reboot' or 'poweroff' (any with visible response) from debug UART, but I cannot see no response in Putty monitor.
And in the same time I can see full output by SSH. //look screenshots below
I cannot understand how to add an image in this post, so look up my OneDrive:
or I can put it on my website with detailed description of all issues that I'm encountering.
I successfully re-flash NAND, I tried to remove and insert battery, I tried to boot from SD image, I tried different UART-to-USB converters (I have three of them, one yours, that I ordered with board and two CP2102 mine). And I'm an embedded engineer, so I don't confuse RX and TX.
So I think I tried everything. Nothing was helpful, UART listens to me, but does not answer.
I'm not seeing 'olimex@rk3188:~$', nothing, at all.
I should turn on echo to see what I'm typing.
And else. I'm working with your device in ESD protective wristband, I know what is 5V TTL and 3.3V CMOS levels (cp2102 can implement both).
I'm sure it should be simple explanation of what happening, but I can't find it.
On Мonday, I will test UART lines with oscilloscope, but it seems to me, that my RK shoud prepare for long trip to motherland)))
B.R. Constantine Laskov.
I don't understand why you say "your". I don't work for Olimex.
Sorry JohnS, I was not going to offence you anyhow.
Thank you for your support and quick response.
I decided to remove this one-side dialog to my site:
Maybe this will attract attention of OLIMEX's support engineers.