We are using Colibri VF50/VF61, Iris carrier board, oe-core with qt application and 7 inch display with resistive touch panel. We have got the display part (18-bit interface) working but the resistive touch panel does not detect touch signal. We have crosschecked the connections. Also we are getting the analog signals changing on X19 connector on Iris board when screen is touched.
We tried calling ts_calibrate to calibrate the touch screen but the touch is not detected on any part of screen. We tried ts_test, ts_print_raw but no output is received on command line.
We tried replacing the touch panel but no response on screen only analog signals are observed on scope. We have tested the touch panel on other system and found to be working.
Is there any way or command to check the adc count for the touch signals.
You are saying that it does not work both on Colibri VF50 as well as VF61? As those two module SKUs actually have completely different touch controllers. While the VF50 uses a discrete circuit of FETs together with the SoC built-in ADCs the VF61 uses the resistive touch controller as built-in to the WM9712 AC97 codec. So it is rather unlikely that both would not be working. A handy tool for testing in our demo images would be evtest.
Yes we connected both VF50 & VF61 and it does not work. Please find output of evtest below on VF50:
root@colibri-vf:~# evtest
No device specified, trying to scan all of /dev/input/event*
Available devices:
/dev/input/event0: colibri-vf50-ts
/dev/input/event1: gpio-keys
Select the device event number [0-1]: 0
Input driver version is 1.0.1
Input device ID: bus 0x19 vendor 0x0 product 0x0 version 0x0
Input device name: "colibri-vf50-ts"
Supported events:
Event type 0 (EV_SYN)
Event type 1 (EV_KEY)
Event code 330 (BTN_TOUCH)
Event type 3 (EV_ABS)
Event code 0 (ABS_X)
Value 0
Min 0
Max 4095
Event code 1 (ABS_Y)
Value 0
Min 0
Max 4095
Event code 24 (ABS_PRESSURE)
Value 0
Min 0
Max 4095
Properties:
Testing ... (interrupt to exit)
root@colibri-vf:~#
To rule out any kind of build/configuration issue on your side could you please try the same with our latest regular stock BSP 2.7b4? As for the screen may I suggest you trying with our stock EDT or later Resistive Touch Display 7" Parallel?
We are using the latest BSP 2.7b4 and checked on Iris as well as Colibri Evaluation board. 18bit LCD display works but ts_calibrate does not detect touch input.
We currently do not have EDT display have requested for same. Once we receive will update on EDT display testing.
Please note that our regular LXDE based BSP demo images are not using ts_calibrate but rather xinput_calibrator. Could you please also validate whether or not that would be working as I suspect some software misconfiguration? This is why I previously suggested to try our latest regular stock BSP as well which BTW now would be 2.8b1.
Yes, 2.7b3 is definitely no longer supported. However what I really suggested is trying it with our regular Embedded Linux Demo with LXDE 2.7b4. Once that is confirmed working you may try Qt4e as well.
We tested on EDT display with 7inch Resistive touch display and found to be working with VF50, and does not work with VF61.
Then we tested our display with VF50 and found that our touch panel requires more force to operate.
