raspberry pi tft display rotate in stock

I used this technique in my Retro Arcade Table project where the monitor was mounted up-side-down in order to improve the viewing angle. The monitor looked much better when viewed from the top and being able to rotate the screen was a massive improvement.

By default the matrix is set to and identity matrix, meaning a one-to-one mapping: (The dots are placeholders to help line stuff up, imagine they are not there, Inscrutables removes the spaces)

So as you see the x and y values have now switched but the new x value is also negative. It is a little difficult to visualize, so look at my example in the pictures. A line is traced from center to the right, now when it is rotated 90° (clockwise), you notice the traced line goes from center -> right (+x) to center -> down (-y) and this is why the input vector needs to be changed as such. The rest of the rotation matrices are listed in the next step but now you know a little more about what is going on!

I have a 3D printed stand that does nicely (http://www.thingiverse.com/thing:995394) for holding the display with attached RPi, but require the cables that power and connect the Pi+display to be at the top of the display in the stand.

Somewhere along the way on installing and configuring a fresh Raspbian image, updating the packages and doing anrpi-update, the Touchscreen display rotated 180° (upside down).

I also tried display_rotate=2in /boot/config.txt. It works to rotate the display, but then the touchscreen points are not correct-- the input events are reflected to where they would be if the display were still upside down.

I tried that instead of display_rotate=2 and BINGO! I thought I has seen something like that elsewhere, but I was not able to find it, so I am including here too.

I have read through this thread and those linked within and what i am reading is that a method to rotate the screen 90 or 270 degrees AND rotate the touch interface isn"t documented here.

twuelfing wrote:I have read through this thread and those linked within and what i am reading is that a method to rotate the screen 90 or 270 degrees AND rotate the touch interface isn"t documented here.

I just added this display to my Raspi 3, and I would like it to be rotated 180deg as that is the correct orientation with the display case I have. Following the advice in this conversation I have entered

and re-boot. This makes no difference. The GUI interface is still displayed in the default orientation. I did an update to the most recent Rasbian right after hooking up the display so I am running v8 (jessie).

I just added this display to my Raspi 3, and I would like it to be rotated 180deg as that is the correct orientation with the display case I have. Following the advice in this conversation I have entered

and re-boot. This makes no difference. The GUI interface is still displayed in the default orientation. I did an update to the most recent Rasbian right after hooking up the display so I am running v8 (jessie).

im attempting to make a raspberry pi phone from david hunts page but unfortunately, anything i try results in near crashs (and on a side note for anyone whos building this, the FONA module almost smoked itself simply due to my stupidity)

simply put, i may have a solution to this: i found on one site, by launching the code: xinput --list , this will show you the displays that the program can pickup and i found that my display was noted as stmpe-ts. yours might be different but try subsituteing this into the /boot/config.txt and see how this works out.

When Raspberry Pi players need to do touch screen rotation for portrait application, they often encounter the problem that the display image has been changed to portrait mode, but the touch position has not been rotated synchronously. This is because the touch position of the Raspberry Pi touch screen must be redefined by Transformation Matrix . If the correct transformation matrix value is not defined in Xinput, the touch screen cannot respond correctly.

Here we will explain in detail how to rotate the screen as Portrait (90 degrees) or Portrait flipped (270 degrees) in Raspberry Pi operating system, and rotate the M505T touch monitor to portrait or portrait flipped by specifying the position of the Transformation Matrix, in order to fulfil the touch demand of Kiosk, navigation system or industrial control.

So you"ve just finished setting up your Raspberry Pi touchscreen, and it"s upside-down. This guide will show you how to rotate or flip your Raspberry Pi"s display and touchscreen output between landscape and portrait modes. This is useful if you want to display your Raspberry Pi screen output in portrait mode or if your screen is upside down!

This should work for any display or touchscreen you might be using, including those on our list of the best touchscreens for the Raspberry Pi. If you need to know what resolution your Pi is outputting, check out this guide to look up your Raspberry Pi display resolution.

A standard Raspberry Pi project that uses a typical HDMI monitor probably has a display with the correct orientation. But that’s not always the case. Perhaps you’ve installed an unusual monitor and need to flip things around.

After all, screen rotation is a feature most operating systems support for good reason. Word processing (reports, school assignments, even screenplays) benefit from a display rotated 90 degrees.

Your easiest option for rotating the display on a Raspberry Pi is via the operating system. In Raspberry Pi OS there is a specific menu command in the desktop environment. Make the right selection here, and you can rotate the display clockwise, anti-clockwise, or flip it entirely.

Ubuntu is an increasingly popular option for Raspberry Pi users as an alternative to Raspberry Pi OS. Steps for rotating the display in Ubuntu differ slightly.

Users with a Raspberry Pi 4 will find that computer has its own command line screen rotation instructions. These are an alternative to the steps outlined above.

To pre-configure the Raspberry Pi display settings, you can edit the config.txt file before the first boot. This can also be edited at any other time, although the changes will not be instantaneous.

If you’re using Windows, you’ll find config.txt in the Pi’s boot folder, the only part of the SD card that is readable. It can be edited in Windows Notepad or any other text editor.

On Linux (including Raspberry Pi OS), you can open config.txt in a desktop text editor or in the terminal. To edit config.txt in a tool like nano, which is preinstalled, use: sudo nano /boot/config.txt

Browse through the text file until you find a setting called display_hdmi_rotate. (If this doesn’t exist, you can add it on a new line at the bottom of the page).

For example, if you were using the official Raspberry Pi 7-inch Touchscreen Display and wanted to flip (or invert) the display, you would use: display_hdmi_rotate=2

Third party displays require slightly different instructions. For example, if you set up a Hyperpixel or other Raspberry Pi display HAT, the command required is the simpler display_rotate=x.As before, 0 resets the orientation, with 1, 2, and 3 available as rotation options.

The rest of this guide looks at settings and commands, but there is a chance you won’t need them. After all, there is a chance that your Raspberry Pi display doesn’t need rotating. Instead, you just need to rethink your project to ensure everything lines up the way you need it to.

So, consider the project, the cabling you’re using, and any chassis or case. Could a different cabling solution improve positioning of the display? Could you stick with the Pi’s default orientation if the cables were otherwise arranged?

There is no need to put up with upside-down or incorrect orientation from your Pi’s display. Simply use one of these options to rotate the display, using desktop menus, terminal commands, or configuration statements.

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:

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.

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:

On your A+, B+, Pi 2, or Pi 3 you will need to connect the main display ribbon cable between the display driver board and your Pi. This cable looks just like a Pi camera cable, and fits into the connector on the edge of the board nearest the SD card slot.

At the driver board end, the gold contacts on the ribbon cable should face upwards away from the LCD panel. The ribbon should then loop around and plug into the Pi, which is mounted on the back of the assembly.

If you"re using a plethora of power hungry USB devices and a power hungry HAT you might want to use two power supplies. This is possible to do, but it can be tricky to turn them on at exactly the same time so the Pi and LCD can talk to each other and initialise properly.

If you"re using our stand, you"ll have to rotate the screen. We"ve orientated it so that the Pi power, AV and HDMI ports are facing upwards, to keep the sleek low profile look, and the GPIO is at the bottom so you can wrap a ribbon cable underneath for easy access to GPIO via Black HAT Hack3r.

If you get a black screen, it likely means your DSI cable ( the one between the Pi and the driver board ) isn"t seated correctly. Turn off your Pi and display and double-check the cable is pushed firmly into each connector, and that the gold contacts face upwards on the driver board side.

As Clive demonstrates below, you can make a much more compact setup by flipping your Pi and mounting it with the ports facing towards the back of the LCD. However, the current GPIO ribbon cables we use wont fit between the two metal risers, so you wont be able to easily break your GPIO out in this configuration.

Gasp! Okay, I can see why you"d want to do this! I couldn"t put it better than the great step-by-step forum post here: https://www.raspberrypi.org/forums/viewtopic.php?f=108&t=120793

You can find a technical drawing with dimensions of the display and mount hole locations here: https://github.com/raspberrypi/documentation/tree/master/hardware/display

7) Connect the HDMI interface of the LCD to the HDMI port of Raspberry Pi and then power on the Raspberry Pi, it can display normally after waiting for about a few seconds.

The screen is displayed vertically by default. For convenience, you can adjust the display orientation of the screen, see #Rotation(Working with Raspberry Pi).

After the display is rotated, the position of touch is incorrect because the touch doesn’t change with the display angle. So the touch also needs to be modified.

In some special systems, when you cannot rotate by modifying the software, you can press and hold the "Rotate Touch" button for 5 seconds to rotate touch. And you may need to test multi times for the correct orientation.

We recommend using the software modification method. Otherwise, when using the new system, it may cause touch reverse errors. At that time, you need to press and hold "Rotate Touch" to rotate.

Since the first-generation Raspberry Pi released, Waveshare has been working on designing, developing, and producing various fantastic touch LCDs for the Pi. Unfortunately, there are quite a few pirated/knock-off products in the market. They"re usually some poor copies of our early hardware revisions, and comes with none support service.

Please note that we"ve found some poor copies of this item in the market. They are usually made of inferior materials and shipped without any testing.

Compatible and Direct-connect with any revision of Raspberry Pi. (If you are using a Raspberry Pi Zero / Zero 2 W, an additional HDMI cable is required).

Raspberry Pi leads out 40 GPIO pins, while the screen leads out 26 pins. When connecting, pay attention to the corresponding pins and Raspberry Pi pins.

5) Insert the TF card into the Raspberry Pi, power on the Raspberry Pi, and wait for more than 10 seconds to display normally. But the touch is abnormal at that time, and the touch needs to be calibrated as the following steps.

You can perform touch calibration by clicking the Raspberry Pi icon on the taskbar, selecting Preferences -> Calibrate Touchscreen, and following the displayed prompts.

4. After calibration, the following data will be displayed. If you want to save these touch values, you can replace the data in the red circle with the data in the corresponding position in 99-calibration.conf.

Since the ads7846.dtbo provided by Raspberry Pi by default has no de-jitter parameters, you can increase the de-jitter parameters by modifying and replacing ads7846.dtbo

Note that if you"re using a touchscreen you"ll also have to swap the touch X and Y axis. For more information check this display configuration overview.