Hi. After successful experiences over mini2440, 7 and 5 inchs LCDs and resistive touchscreens, we hopefully bought a tiny210, due to its Cortex A8 processor, PowerVR SGX540 graphics engine, memory and a great capacitive touchscreen. But testing the different systems contained in the BSP we have not been able to recover, even in the original Android 4, the capacitive touchscreen functionality. ("skipcali=yes ctp=1" added to each commandline) Following error appears at boot time and in system log while trying to reload the goodix_touch module gt80x-ts 2-0055: Warning: I2C connection might be something wrong! gt80x-ts: probe of 2-0055 failed with error -1 Also source code for goodix_touch is not contained in the BSP. Does anybody can contribute with some information? Regards
capacitive touchscreen in tiny210 w. linux
Thanks Reggie, but after spend a lot of time with the Goodix module and its persistent I2C error, finally I decided to sniff the I2C communication with a logic analyzer. When I put hands on in the panel and opened it in order to extract two wires with the I2C signals I could observe that capacitive touchscreen controller is not Goodix but a Focaltech FT5406. Extracting the module ft5x06_ts.ko from the android rootfs and loading it in linux 3.0.8 kernel works like a charm.
Alejandro, that's fantastic, well done :-) so now that you've identified the controller, the source code should be relatively easy to find, in fact: https://github.com/Asure/Dropad-kernel-188.8.131.52/blob/master/drivers/inpu... I know it's not from the 3.0.8 kernel source but it's a start. BTW. I don't know if you're using the hdmi output on the 210 but it would appear that there is a samsung s5p-tv driver in 3.1.x kernel sources, perhaps we need to push friendlyArm for an update?
Hi Reggie: Thanks for your encouraging words, but for me is inexcusable spend so much time before decide to open the LCD panel. So obvious! Thanks also for the link to the Focaltech's source code. Now, once got output in /dev/input/eventX, I'm trying to link it to tslib + QT-4.8.3. And in respect to the HDMI output, at the present is not a priority for our work. The target is a capture/control panel for a biomedical appliance. But FYI, I compiled the 3.0.8 kernel with HDMI support and in fact I can see in the boot process "s5p-tvout s5p-tvout: hpd status is cable removed", so, after read your post I held out a cable to an external monitor and it really works :)
tslib and qt4.8.3 should be pretty simple, I've recently messed around with buildroot/qemu and a mini2440 kernel/rootfs, it really was pretty simple, the pain was adding mysql as well, which is where buildroot came in very handy indeed. There are actually quite a few tutorials around for qt4/tslib, I can't see there being much difference between a 2440 and a 210, just march/cpu. That's interesting about the 3.0.8 kernel, I couldn't see the hdmi s5p-tv driver, that puts a completely different complexion on things.
Can somebody who got the capacitive touchscreen of H43 LCD to work with Linux on the min210s share the steps. I built the 3.0.8 kernel and built the ft5x06_ts module. I loaded the module doing "cat /dev/input/event2" shows something when I touch the screen. I have the following the /etc/init.d/rcS file: export QWS_MOUSE_PROTO=TSLIB:/dev/input/event2 export TSLIB_CALIBFILE=/etc/pointercal export TSLIB_CONFFILE=/etc/ts.conf export TSLIB_FBDEVICE=/dev/fb0 export TSLIB_PLUGINDIR=/usr/lib/ts export TSLIB_CONFFILE=/etc/ts.conf export TSLIB_TSDEVICE=/dev/touchscreen-1wire export TSLIB_TSEVENTTYPE=INPUT ... ... /opt/Qtopia/bin/led-testing -qws & the led-testing app shows up, but I see the error: " Mouse type TSLIB:/dev/input/event2 unsupported " and the touches have no effect Any help is appreciated Thanks Ali
I finally solved the problem like this: (I Have a mini210s with captouch) i exported everything like ali but before i edited the first line of the file /etc/ts.conf module_raw friendlyarm-ts-input module pthres pmin=1 module variance delta=30 module dejitter delta=10000 module linear to module_raw friendlyarm-ts-mtinput with my configuration and qt4 it worked. ps: you have to calibrate the touchscreen before with ts_calib otherwise the mouse will disappear when you touch the screen.
weeeeeeeee i can start Xorg with cataptive touch http://yamolodoi.ru/blogs/blog-utkonosa/add-touchscreen-support-on-frien...
When you want to run your board with a capacitive LCD you need to specify “skipcali=yes” and “ctp=n”. The value “n” can be either 0 or 1, 2, and 3. If n=0 it means no capacitive LCD will be connected. If n=1 it means a GT80X based 7’ capacitve touch panel will be connected. If n=2 it means a FT5206 based 7” capacitive touch panel will be connected. If n=3 it means a FT5406 based 7” capacitive touch panel will be connected.