Getting Qt 4.3.2 running on the Chumby
The libraries
First, we need the GNU toolchain to cross-compile things for the Chumby. Download and install it from:
Now, we need to decide where to install our files to; i.e., our prefix. Since I'm having some trouble with my NFS share, I'll use my USB stick. (Located at /mnt/usb). Feel free to replace this with your prefix wherever you see me mention this location. Next, we need to download and install tslib for the touchscreen.
I used version 1.0 from: http://tslib.berlios.de/
Make sure you have autoconf, libtool, and the other usual suspects installed. Then from the extracted files directory run:
./autogen.sh
./configure --prefix=/mnt/usb --host=arm-linux
make
If you get some errors about rpl_malloc, simply comment out that evil line in config.h and try make again.
And finally:
make install
Next up is Qt.
Unpack it, and run:
./configure -embedded arm -pch -prefix /mnt/usb -qt-kbd-usb -qt-mouse-tslib \
-L/mnt/usb/lib/ -I/mnt/usb/include/ -nomake examples -nomake demos
Note:You can leave out the -qt-kbd-usb if you want. I kept it in since I like being able to type on the Chumby with my USB keyboard ;). Also, thanks to orangerobot from the Chumby forum for pointing out the mangled -L line.
Next:
make
make install
So far we don't have any Qt programs to play with. Let's compile a small Qt widget/app called PictureFlow (http://code.google.com/p/pictureflow/) by Ariya Hidayat.
I have modified the sources slightly (added basic mouse support, some images, resizing), and packaged it here:
pictureflow-chumby_1_0_tar.gz
Uncompress it, and in that very directory:
/mnt/usb/bin/qmake
make
Copy the resulting binary and images to a place on your prefix:
mkdir /mnt/usb/test
cp pictureflow *jpg /mnt/usb/test/
Now, we need to create a file with some environment variables that you can use when you're in your Chumby shell.
Create a file in your prefix (/mnt/usb for me) called chumby.env with the following contents:
export TSLIB_TSDEVICE=/dev/input/event0
export TSLIB_FBDEVICE=/dev/fb0
export TSLIB_PLUGINDIR=/mnt/usb/lib/ts
export TSLIB_CONSOLEDEVICE=/dev/ttyS0
export TSLIB_CONFFILE=/mnt/usb/etc/ts.conf
export TSLIB_CALIBFILE=/mnt/usb/etc/pointercal
export LD_LIBRARY_PATH=/lib:/mnt/usb/lib
export POINTERCAL_FILE=/mnt/usb/etc/pointercal
export QWS_MOUSE_PROTO=Tslib:/dev/input/event0
export QWS_KEYBOARD=USB:/dev/input/event1
Finally it's Chumby time!
Enable SSH on the Chumby as per:
http://wiki.chumby.com/mediawiki/index.php/Chumby_tricks#Open_a_secure_s...
SSH in and cd in to your directory of installed files.
For me, this meant:
Plugging in my USB stick.
ssh root@<ChumbyIpAddress>
cd /mnt
umount usb
mount usb
cd usb
Lets start off by killing the current Chumby GUI:
/usr/chumby/scripts/stop_control_panel
Now, we need to source that file with environment variables:
source /mnt/usb/chumby.env
Then, we need to configure the touch screen for tslib.
Make sure that your etc/ts.conf file has the input module un-commented.
My /mnt/usb/etc/ts.conf looks like:
module_raw input
module pthres pmin=1
module variance delta=30
module dejitter delta=100
module linear
Finally, we need to calibrate the touchscreen:
/mnt/usb/bin/ts_calibrate
Make sure that you touch the five different crosshair locations. If you accidently tap twice at the same spot, re-run ts_calibrate untill you get it right :)
To test and make sure that tslib is working correctly, feel free to play with:
/mnt/usb/bin/ts_test
You should be able to drag the crosshair around.
And last but not least - it's time to try out our Qt app:
cd /mnt/usb/test
./pictureflow -qws
If all is well, you should see something that looks like this:
(http://www.youtube.com/watch?v=v2yN0F7_YlI)
Hopefully you didn't encounter any problems. These steps worked for me, but I may have just been lucky ;). More likely though is that I forgot to mention something. Please feel free to ask questions on this Chumby forum thread:
http://forum.chumby.com/viewtopic.php?id=720/
Allthough I realize that this was quite cumbersome, the good new is that you basically only need to do this once. Thereafter you just need to write your Qt app (Google for tutorials ;)), qmake, make, and copy the executable to your Chumby! :)
Comments
cool
It's good to know that PictureFlow can work out-of-box on this cool device :-)
re: cool
Indeed - and performance is really great! Thanks for making such a neat widget :)
Qtopia on Chumby
I'd already follow your instruction for build qtopia and all the compiling process works fine, but, when i run ts_calibrate the LCD don't show the crosshair. I set the environment variables as file:///home/cain/Desktop/chumby/qt_on_chumby.html say, but i can't see nothing sad
If i run:
unzip -p /bitmap/chumby_logo.zip >/dev/fb1
some colored circles are shoen in LCD, why QT applications don't drive the LCD?
There are a environment variable that manage the QT framebuffer device?
When i run:
/mnt/usb/examples/qtopiacore/framebuffer/framebuffer
The framebuffer device was opened successfully.
Fixed screen info:
id: IMX
smem_start: 0xc3d40000
smem_len: 153600
type: 0
type_aux: 0
visual: 2
xpanstep: 0
ypanstep: 0
ywrapstep: 0
line_length: 640
mmio_start: 0x0
mmio_len: 0
accel: 0
The framebuffer device was mapped to memory successfully.
Switch to graphics mode failed: Invalid argumentVariable screen info:
xres: 320
yres: 240
xres_virtual: 320
yres_virtual: 240
yoffset: 0
xoffset: 0
bits_per_pixel: 16
grayscale: 0
red: offset: 8, length: 4, msb_right: 0
green: offset: 4, length: 4, msb_right: 0
blue: offset: 0, length: 4, msb_right: 0
transp: offset: 0, length: 0, msb_right: 0
nonstd: 0
activate: 0
height: -1
width: -1
accel_flags: 0x0
pixclock: 62500
left_margin: 15
right_margin: 6
upper_margin: 9
lower_margin: 7
hsync_len: 1
vsync_len: 1
sync: 0
vmode: 0
Will draw 3 rectangles on the screen,
they should be colored red, green and blue (in that order).
Done.
But nothing appear an LCD :(
re: Qtopia on Chumby
In your example, you mentioned:
"unzip -p /bitmap/chumby_logo.zip >/dev/fb1"
On my device, fb0 was what worked. Try running "export TSLIB_FBDEVICE=/dev/fb1"
And let me know if you see when you run ts_calibrate.
Also, make sure your ts.conf file is properly set up as described in the guide.
We can tackle Qt itself after that ;)
Qtopia on Chumby
Hi Jesper, thanks or your fast answer:
My /mnt/usb/etc/ts.conf is:
module_raw input
module pthres pmin=1
module variance delta=30
module dejitter delta=100
module linear
when i set:
export TSLIB_FBDEVICE=/dev/fb1
and run ts_calibrate the lcd turn in black :(, but the touch screen seem work fine, i see messages when i press the scren
re:Qtopia on Chumby
I'm really not sure what this could be. I'll try to follow my steps from scratch this week, and let you know if it works for me. Perhaps something has changed since the Chumby updates have come out...?
Good luck, and keep on trying meanwhile ;)
Qtopia on Chumby
Hi
I update my chumby this week, maybe there are changes.
I have a question:
When you compile qtopia, what color depth are you choice?
Best regards
Same issue with ts_calibrate
I am having the same issues with ts_calibrate -- the chumby screen never displays the calibration targets but it does responds to taps.
Setting TSLIB_FBDEVICE=/dev/fb1 causes the same issue described above -- the chumby screen goes black when i run ts_calibrate (and still responds to taps).
Any help would be much appreciated . . .
I recently just tried
I recently just tried running through the guide, step by step, on another (clean) machine, and succeeded without any trouble. I really don't know what you can do, but perhaps re-check the guide to make sure you haven't missed anything... Are you doing anything different? (such as not installing to a USB stick for instance - different prefix?) Sorry, and good luck!
hello
Its very good thanks..
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