Poor man's LED in Qt 

Create a square label with fixed size, let's say 24*24px.

Use the following stylesheet:
"background-color: rgb(85, 255, 0); border-radius: 12px;"

Change/clear the stylesheet when the LED is off.
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Hi3518 module notes 

A while ago I have bought a Hi3518 based camera module from the Aliexpress.

It is called BLK18E-0712C-38X38_S (V1.01)

Some initial findings:

- No DHCP is set. Static IP at
- Default username for HTTP and RSTP is admin with blank password.
- HTTP interface lang is set to chinese atm. I have no idea where to change this.
- Streaming is done through RSTP on the following URL: rtsp://
(Firefox did not have a plugin for this on Ubuntu, but VLC plays the stream well.)
- I have tried several telnet passwords which is out in the wild root+(juantech, klv123) but neither let me in.

NMAP log shows nothing more intresting (port 8899 IMHO for onvif):

23/tcp open telnet Busybox telnetd
80/tcp open tcpwrapped
|_http-favicon: Unknown favicon MD5: EC9D1C872C50DD7DA7D826D9C85FC158
|_http-methods: No Allow or Public header in OPTIONS response (status code 200)
|_http-title: NETSurveillance WEB
554/tcp open rtsp?
| rtsp-methods:
8899/tcp open soap gSOAP soap 2.7

I have managed to find the UART on the device:

Uboot output:

U-Boot 2010.06-svn (Jan 04 2015 - 13:37:41)

DRAM: 256 MiB
Check spi flash controller v350... Found
Spi(cs1) ID: 0xC2 0x20 0x17 0xC2 0x20 0x17
Spi(cs1): Block:64KB Chip:8MB Name:"MX25L6406E"
envcrc 0xc96922ac
ENV_SIZE = 0xfffc
In: serial
Out: serial
Err: serial
Press Ctrl+C to stop autoboot
hisilicon # <INTERRUPT>
hisilicon # <INTERRUPT>
hisilicon # <INTERRUPT>
hisilicon # <INTERRUPT>
hisilicon # help
? - alias for 'help'
base - print or set address offset
boot - boot default, i.e., run 'bootcmd'
bootd - boot default, i.e., run 'bootcmd'
bootm - boot application image from memory
bootp - boot image via network using BOOTP/TFTP protocol
cmp - memory compare
cp - memory copy
crc32 - checksum calculation
fload - fload - load binary file from a filesystem image for system boot

flwrite - SPI flash sub-system
getinfo - print hardware information
go - start application at address 'addr'
help - print command description/usage
lip - lip - set local ip address but not save to flash

loadb - load binary file over serial line (kermit mode)
loady - load binary file over serial line (ymodem mode)
loop - infinite loop on address range
mac - mac - set mac address and save to flash

md - memory display
mii - MII utility commands
mm - memory modify (auto-incrementing address)
mtest - simple RAM read/write test
mw - memory write (fill)
nm - memory modify (constant address)
ping - send ICMP ECHO_REQUEST to network host
printenv- print environment variables
rarpboot- boot image via network using RARP/TFTP protocol
reset - Perform RESET of the CPU
run - run commands in an environment variable
saveenv - save environment variables to persistent storage
setenv - set environment variables
sf - SPI flash sub-system
sip - sip - set server ip address but not save to flash

tftp - tftp - download or upload image via network using TFTP protocol
version - print monitor version

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Retro: ASUS mimic CX200 JTAG hacking 

Back in my university years I have had some issues with an Asus MIMIC CX200 camera. One of them got broken after a firmware upgrade so I have decided to fix it with JTAG. I have successfully got to UrJTAG to read the IDCODE of the S3C4510B, but I was unable to detect the flash. Now I know that I have had to tweak the bus driver and reveng the board a bit.

Here are some pics (shot with my Nokia 6230 in VGA res) about the trick:

Thin albanian wires were soldered directly to the pins.

Live together cry together series 100 Ohm level shifter JTAG adapter to LPT port.

I have designed an addon board to expose the CPU's intresting interfaces (2 serial, USB, JTAG)

It is fun to look back to those pictures from now. After 5 years we got to a state when it is easier and cheaper to buy a Rpi to solve the same problem rather than fixing that board...
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How to make the QtCreator to not build the project when typing '{' with hungarian layout @ Windows 

The Hungarian layout uses the AltGr+B combination for the { character.
It is a little bit annoying to get the project built every time.
To turn off this shortcut:

Go to Tools > Options > Enviroment >Keyboard tab > Qt4Builder section > Build file.
And clear the shortcut.

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Building QCA (Qt cryptographic architecture) library on Ubuntu 13.10 with Qt5 

I have tried to build the QCA library from the KDE git repository (git clone git://anongit.kde.org/qca.git) with Qt5. (The Ubuntu 13.10 distribution ships only QCA built with Qt4 in the repositories).

The cmake failed with:

CMake Error in CMakeLists.txt:
Imported target "Qt5::Core" includes non-existent path


in its INTERFACE_INCLUDE_DIRECTORIES. Possible reasons include:

* The path was deleted, renamed, or moved to another location.

* An install or uninstall procedure did not complete successfully.

* The installation package was faulty and references files it does not

The solution was creating a symlink from the mkspecs:

sudo ln -s /usr/share/qt5/mkspecs/ /usr/lib/x86_64-linux-gnu/qt5/

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