raspberry pi tft display gpio quotation

This particular display works without any alterations with the Adafruit config files found here: https://learn.adafruit.com/adafruit-dpi-display-kippah-ttl-tft/installation for their 4.3" setup.

The TFT isn’t ‘plug & play’ with the Raspberry, a patch has to be applied to the kernel to be able to interface via SPI with the ST7735R controller chip on the TFT. Once working, the display will act as a framebuffer device.

As it takes over three hours to compile the kernel on the PI, I will show how to cross compile from another Linux PC. In my case, it is Ubuntu 12.10 running within VMWare on a Windows 7 Quad core PC. Kernel compile time is 15 mins.

-Copy config from the Raspberry Pi to the Ubuntu box using SCP. Replace ‘raspberrypi’ below with the IP address of your Raspberry Pi if hostname lookup fails.

If you are planning on displaying the console on the TFT, then enabling these options in .config will allow you to change the font size and rotate the display later on.

To enable parallel processing for a faster compile. If you have a dual core processor add -j 3 to the end of the command below. If you have quad core, add -j 6

The last step below is to SCP the files from from Ubuntu to the Raspberry Pi. If you have trouble SCPing into your Ubuntu box you may need to install open SSH on Ubuntu with sudo apt-get install openssh-server. This step also copies the files from my home folder ‘mark’… yours would be different.

If you build the st7735 driver pair as built-in, add these options to the end of the line in /boot/cmdline.txt. This will display the console on the TFT.

3.5 inch RPi LCD V3.0 HVGA 480X320. There is a XPT2046, 74HC04D, 74HC4040D, and 2 74HC4094D chips on the back. Is there a way to determine which driver I need to use in software?

[*]Is there any way I can extract some information of what driver has been used, or tried to use, for the TFT via that half working distribution? As far as I know, a GPIO/ SPI connection will not gather connected hardware information...

[*]Is there any way I can extract some information of what driver has been used, or tried to use, for the TFT via that half working distribution? As far as I know, a GPIO/ SPI connection will not gather connected hardware information...

I bought a display off Amazon described as [ SainSmart 3.5" inch TFT LCD 240x320 RGB Pixels Touch Screen Display Monitor For Raspberry Pi for Model B & B+] and sold by: Sain Store. What I received is the 320x480 display you described. I am also trying to verify the model before I try to set it up.

It was working but was a bit too slow so, I Increased the speed After setting Everything back to normal the screen is not working properly. The display is fine , but the touch is not responding. Please help! Did I BROKE it ?

I am doing a project to build a mobile desktop (aka tablet + laptop case + case). I have bought a clam shell type case that can house 10.1 inch screen IPS LCD screen, that has 40 pin LVDS.

But the driver board wont fit my clam shell case. I was wondering if there is another option that can use GPIO pins and directly drive the screen. I am quite a newbie to display internal technology. What drivers/chips/pcbs/connectors/technology should I look for? Is this even possible. Any pointers would be very helpful.

@memjr: sorry, but absolutely incorrect! The Pi GPIO can be used as DPI, so you can drive all screens which have DPI interface directly. Size doesn"t matter, so you can drive bigger screens as well.

@OP: the Pi does not have a LVDS interface, so you can"t connect the display without glue logic. The simplest interface to LVDS is an LVDS transmitter. It takes DPI as input and converts it to LVDS. This will allow to drive resolutions up to thr transmitters capability (i.e. FHD = 1920x1080 pixels).

This gives you some idea viewtopic.php?t=157109&hilit=Lvds+40pin+gpio. Below is an example of driving LVDS FHD display from "DPI + glue logic". You need some DIY skills for sure as such an solution is not available off the shelf (AFIK)

Use a 7 inch TFT LCD with 800x480 and 8 bits color depth, 60Hz frame rate as example, you are talking about 17.69 gbits/sec bandwidth. So there is no way GPIO can supply that.

@memjr: sorry, but absolutely incorrect! The Pi GPIO can be used as DPI, so you can drive all screens which have DPI interface directly. Size doesn"t matter, so you can drive bigger screens as well.

2) Get a DPI displays and use your GPIO-DPI interface. Problem is I can"t find any DPI displays at 7inch or higher sizes. Another option is to use DSI-DPI bridge but only available as a chip and not as a PI-compatible board.

There is also RGB/LVDS to mipi DSI board (https://m.made-in-china.com/product/5-0 ... 60301.html). However I am not sure if the TFT LVDS panel I have is LVDS/RGB or something else. These converters also seem to not be available for 7.0 or higher sizes screens.

I understand. For that vision to become reality both Pi foundation and display industry to coincidentally converge on usb-c as main interface for display.

I understand. For that vision to become reality both Pi foundation and display industry to coincidentally converge on usb-c as main interface for display.

Option 1 is using the TI SN65DSI84 DSI to dual-link LVDS chip, which does have some support - aBugsWorstNightmare has made up a board using that family (SN65DSI8[3|4|5]). Read viewtopic.php?t=305690&start=350 for the details of that.

Option 2 uses a Lontium LT8912B chip. There is a driver in mainline Linux for it, but they seem to be very secretive over any information. Also in that datasheet it say "Only Non-Burst Mode supported", which will be a problem as the Pi can only output DSI at particular link frequencies (it"s an integer divider from a PLL).

It seems building a interface/driver is virtually impossible because there is no standard for building DSI displays and the companies don"t share specifications/timing diagram. Please correct me if I am mistaken.

It seems building a interface/driver is virtually impossible because there is no standard for building DSI displays and the companies don"t share specifications/timing diagram. Please correct me if I am mistaken.

Would never ever buy that product based on this spec. So either ask them to provide the full spec or don"t buy it! You were not only missing details on the display interface, there is not detail on the touch in addition (yes, the connector says it"s USB, but what if you want to use it via I2C?).

Get in touch with Vera (vera_yuan _AT_ dlcdisplay.com). Once was in touch with here; she"s very responsive and could provide the requested info as well as giving advice on different (upcoming) products. You can buy DLC via distribution or (if you"re lucky and they carry stock of the particular TFT) digikey.

However, I did came across this https://forum.armbian.com/topic/22815-c ... uchscreen/ that says OrangePi has a 10.1 inch screen that supports MIPI/DSI interface.

It says it is using Ilitek ILI9881c panel controller to drive the display. Was wondering if this controller would be compatible with 10.1inch display. I guess I would have to ask NXP or the company that provides boards with this display. Just thought I would share this info and ask if you have any idea/prior information on this.

Ilitek ILI9881c is a TCON - a controller which is part of the display. There is a driver in the kernel source which has init code for several displays already. There are others here on the forum who were trying to get their ILI9881 based display running as well viewtopic.php?t=339281

That Orange Pi display appears to use 4 DSI data lanes, therefore you"ll only have a chance of getting it to work on a CM4, not a regular Pi (which only exposes 2 data lanes).

That Orange Pi display appears to use 4 DSI data lanes, therefore you"ll only have a chance of getting it to work on a CM4, not a regular Pi (which only exposes 2 data lanes).

Maybe someone reading here has one and can check if there are some labels on the back telling us what it is. Or they were also using a "modified" RockChip driver which allows for passing DSI init sequence parameters (remember viewtopic.php?t=339281 ... lot"s of 10.1in DSI related questions atm ...)

A small colour screen you can connect directly to your Raspberry Pi A and B. It can also be used with the Raspberry Pi B+ and the Raspberry Pi 2 (as long as you don"t mind the PCB overhanging the USB ports by 5mm).

Its touchscreen and resistive overlay, as well as its TFT display module, come already assembled, ready to be connected and programmed via your Pi – there is no welding at all, it’s a bona fide plug and play device!

The module uses your Raspberry Pi"s SPI interface, your screen and the SPI (SCK, MOSI, MISO, CE0, CE1) and GPIO 24 and 25 pins. The GPIO 18 can be used to PWM dim the backlight. The GPIO 21, 22 and 23 pins are left free.

There is a 2x13 header on the bottom, so it is possible to connect a standard Pi GPIO cable to it. You can snap off the 4 perforated mounting ears for a slick exactly-the-same-size-as-a-Pi look.

This small, colour touchscreen for Raspberry Pi can be used in many different ways, for example as a console or video screen, a DIY GPS or smartphone screen, or even in a small point-and-shoot camera. It can also be used to create a mini arcade game or a mini computer.

The touch screen LCD is ready with 320×480 resolution, 50 FPS (Frame per second). Resistive touch control is being supported by the Raspberry Pi OS or Raspbian (directly-pluggable). However, we will still need to install the driver for graphic display :)

However, there is a dedicated case/enclosure and a low-profile heatsink with a fan for this LCD to fit perfectly on the Raspberry Pi 4 Model B. The case has an opening for the LCD, and the low-profile heatsink with a fan keeps the Raspberry Pi 4 Model B protected and cool! You get a perfect console :) Don"t forget to remove the top lid/cover of the enclosure for the 3.5-inch LCD.

Note: The Raspberry Pi 4 Model B, 3.5-inch Enclosure, and the Low-Profile Heatsink with a fan are NOT INCLUDED in this product, please get them separately.

As we understand, Raspberry Pi 4 Model B delivers great performance and of course, more power will generate more heat as of all CPU :) So we need a way to install an additional heatsink to dissipate the extra heat. It will be better if we can have the option to add a cooling fan for active cooling. Well, this 3.5-inch touch screen LCD comes ready with the heatsink and cooling fan for you to use with the Raspberry Pi 4 Model B. it solves all the concerns.

The 3.5-inch touch screen uses the GPIO on the Raspberry Pi board, so it stretches out 2 pins as the power to supply the cooling fan on the low profile heatsink, and keep the Raspberry Pi board cool!

Note: The Raspberry Pi 4 Model B, 3.5-inch Enclosure, and the Low-Profile Heatsink with a fan are NOT INCLUDED in this product, please get them separately.

The Graphic driver is provided and can be downloaded for Raspberry Pi OS/Raspbian. It also supports Ubuntu and Kali Linux. Do follow the steps here: http://www.lcdwiki.com/MHS-3.5inch_RPi_Display

Note: Please use the recommended system for the touch screen. If another system is used, it may not have the touch function or may not work. You need to configure it yourself. Because there are many systems that the Raspberry Pi can use, we can’t make every system compatible with the touch screen.

One of the most awaited plugins for Volumio is finall here: the touchscreen plugin. With it you can easily show the gorgeous Volumio UI on any display, included the official Raspberry PI Display, available on our Shop. Let’s see how to easily achieve a fantastic touchscreen for your favourite music player in less than 10 minutes. This tutorial will explain how to connect the Raspberry PI display and enable the Volumio UI with the plugin.

Assuming you’ve already downloaded and flashed Volumio to your Raspberry PI (we suggest to use the newest  Raspberry PI 3), the first step is the wiring:First, let’s attach the ribbon cable going from the Raspberry PI Display to the PI itself. On the Raspberry PI Side, make sure the blue part of the ribbon cable is facing outwards. Your final goal should look like this:

You’ll have 4 coloured cables to connect too. They are 5v, GND, SDA and SCL. You can look at the below image to identify the proper pin on the Pi itself.

Notoriously, feeding your PI with an adequate Power Supply is mandatory to have a reliable system. That’s especially true when we connect a power-hungry device like the Raspberry PI Display. Luckily, there’s a way to understand if your PSU is good enough: just power on your pi and observe the screen, if you see a coloured square on the top-right side of the screen, it means that power to your PI is not enough. Don’t you see it? Then all is good.

The installation will last about 7 minutes, so wait patiently until you see “Installation Complete”. Now you can enable or disable the Display output to your likings.

I must admit that altough this display is not particularly brilliant when it comes to resolution and colour accuracy, it looks indeed very nice with Volumio’s UI. Also, usability is very good on the Raspberry PI 3 and the UI runs smoothly also with big libraries… So, folks, enjoy!

If you don’t have a Raspberry PI, or you’re simply looking for alternatives to the Official Raspberry PI Display, there are at least two extra options for you:

The Odroid display is not only a viable alternative, it also have several advantages over its PI counterpart:Since it takes power from USB and video signal from HDMI, it can be used virtually with any Computer with an HDMI output, not just the Odroid or the Raspberry PI.

UPDATE: Lot of time since I published the original article. The Odroid 7” does not seem to work properly with Raspberry PI (not tested with the Odroid). So, if you’re looking for a display for the Raspberry PI, get the official one.

The Waveshare 7” display has become rapidly a widely adopted display, thanks to its cheap price. However this particular touchscreen has shown several reliability issues (altough this seems fixed in latest models, thanks to a firmware update), it requires a particular touchscreen driver which is not always included in major distros and its colour reproduction is not the best.

Here we are folks! Hope you found this article helpful, you can share via comment below how you use your Volumio’s touchscreen setup and if there are other display alternatives!