tontec 7 raspberry pi lcd touch screen display quotation

From what i can tell there are a few working solutions out there now for touch screens but in case your still looking for hardware that is known to work and setup instructions see below:

UPDATE: problem was because I copied and pasted your commands (i.e. the quotes are not the same) when using this, retype all the commands above instead of copy and paste.

Yes. However i am looking to put a post up regarding the driver, the default driver is not allowing the screen to be fully populated (desktop covers around 90% of the screen)

Yes. However i am looking to put a post up regarding the driver, the default driver is not allowing the screen to be fully populated (desktop covers around 90% of the screen)

That will run, you have to touch the screen in a few spots, and then it exits printing the coordinates to the console. You can just cut and paste the line into /etc/X11/xorg.conf.d/99-calibration.conf

I have an eGalax touch screen (lsusb indicates such) and if I follow the instructions I get "Error:No calibratable devices found" when running xinput_calibrator. I"m running 2014-01-07-wheezy-raspbian.

I have an eGalax touch screen (lsusb indicates such) and if I follow the instructions I get "Error:No calibratable devices found" when running xinput_calibrator. I"m running 2014-01-07-wheezy-raspbian.

Have you copied all the kernel modules across? Make sure to remove the old lib and modules directory before copying, and try it again. It should work after you follow the instructions to recompile the kernel (my article here http://simonmcc.blogspot.co.uk/2013/08/ ... d-for.html or the standard engineering diy one should help out)

I hadn"t. I"m currently trying to calibrate the raspbmc installation which includes the modules. It seems the X/Y coords are flipped over for me & touch is only picked up in the lower right corner.

I had an issue with mine where the mouse stayed along the top of the screen, and this was because of an incompatible version of the bootloader or something. I downloaded an older version of raspbian and it worked again, maybe you should try an older version to see if it works?

In the previous article, I described the steps needed to install an LCD touchscreen on the Raspberry Pi. In this article, I will show you how to adjust the screen rotation of the LCD to landscape mode, and will show you how to calibrate the touchscreen pointer for optimal accuracy. Just follow the steps below to compete the process of setting up your Raspberry Pi LCD touchscreen:

1. First we need to change the setting for screen rotation in the /boot/cmdline.txt file. This setting is called fbtft_device.rotate=X. By default, this is set to X=0, which results in a portrait mode screen orientation. In order to switch the orientation to landscape mode, change fbtft_device.rotate=0 to fbtft_device.rotate=90. Enter sudo nano /boot/cmdline.txt at the command prompt. There should only be one line in this file. Go to the end of it and you will find the fbtft_device.rotate=X setting. Change the value from 0 to 90:

However, if you try to touch the screen now, you will find that the pointer movement does not correspond to your finger movement. This is because the LCD screen driver and the touchscreen controller driver have separate settings for screen rotation. We need to change the rotation of the touchscreen controller driver to match the rotation of the LCD screen driver.

2. You probably noticed that dragging your finger to the right moves the pointer up, not to the right. This indicates that the x and y axes of the touchscreen are swapped. To correct this, we need to swap the x axis for the y axis. This can be done by changing the swap_xy=X parameter in /etc/modules.

Enter sudo nano /etc/modules at the command prompt to edit the file. Go to the line for the ads7846_device parameters and move the cursor to the right to find it:

Now if you drag your finger around the screen, you will notice that the y axis (up and down) is correctly aligned with the motion of your finger. However, the x axis (left and right) is still inverted. To fix this, we need to install two more kernel modules, xinput and evtest. xinput is a Linux utility that will allow us to configure input device settings for the touchscreen controller, and evtest is an input device event monitor and query tool.

After the Pi finishes rebooting, you should notice that when you move your finger across the touch screen, the pointer should follow correctly in both axes. If you are using the Raspberry Pi 2 Model B, you will need to complete the calibration steps below before the pointer follows your finger correctly (and make sure that you have enabled startx to load automatically – see step 6 in this article).

You can rotate the screen 90 degrees (as we did in this tutorial) and the power connector will be at the bottom of the screen, but you can also rotate it 270 degrees so that the power connector is at the top of the screen. To do this, simply enter fbtft_device.rotate=270 in the /boot/cmdline.txt file. Then change the DISPLAY=:0 xinput --set-prop "ADS7846 Touchscreen" "Evdev Axis Inversion" 0 1 line in the /etc/X11/xinit/xinitrc file to DISPLAY=:0 xinput --set-prop "ADS7846 Touchscreen" "Evdev Axis Inversion" 1 0. All you need to do is switch the values of the 0 and 1 at the end of this line.

Now that we have our LCD touchscreen up and running, the final step in the installation is the calibration of touch control. This will make the pointer much more accurate and easier to use.

2. Now we need to install the calibration tool we will be using, xinput_calibrator; and other filters for controlling the touchscreen response. Install the tslib library by entering aptitude install libts-bin:

4. Now we can use ts_calibrate. Enter ts_calibrate at the command prompt (make sure you are still in root mode) to run the ts_calibrate program. The program will consecutively display five crosses on different parts of the screen, which you need to touch with as much precision as possible:

Drag the cross around the screen and observe how closely it follows your finger or stylus to test the accuracy of the calibration. Now press the “Draw” button to enter the drawing mode:

This is kind of a long process, but it is well worth it if you want to get the LCD touchscreen set up properly. So if you have any trouble setting this up or have anything to say, please leave a comment below. Also, if you found this article useful, please share it with your friends!

The Raspberry Pi Foundation wanted to make sure you have the perfect display screen. And here it is. Offering a number of possibilities, you can use the Raspberry Pi 7” touchscreen as a visual display screen or a simple input device. Easy to set up, you’ll be creating IoT projects in no time all thanks to the 800 x 480 pixel resolution, 24-bit RGB colour and 60 fps. All of this with no electronic interference – grab your Raspberry Pi 7″ touch screen today.

The 7” Touch screen Monitor for Raspberry Pi gives users the ability to create all-in-one, integrated projects such as tablets, infotainment systems and embedded projects. The 800 x 480 display connects via an adapter board which handles power and signal conversion. Only two connections to the Pi are required; power from the Pi’s GPIO port and a ribbon cable that connects to the DSI port present on all Raspberry Pi Boards.