tft display 800x480 w o touch test adfruit brands

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This 5.0" TFT screen has lots of pixels, 800x480 to be exact, and an LED backlight. Its great for when you need a lot of space for graphics. These screens are commonly seen in consumer electronics, such as miniature TV"s, GPS"s, handheld games car displays, etc. A 40-pin connector has 8 red, 8 green, and 8 blue parallel pins, for 24 bit color capability.

This is a "raw pixel-dot-clock" display and does not have an SPI/parallel type controller or any kind of RAM. The display is supposed to be constantly refreshed, at 60Hz, with a pixel clock, V sync, H sync, etc. There are some high end processors such as that used in the BeagleBone that can natively support such RGB TTL displays. However, it is extremely rare for a small microcontroller to support it, as you need dedicated hardware or a very fast processor such as an FPGA. Not only that, but the backlight requires a constant-current mode boost converter that can go as high as 24V instead of our other small displays that can run the backlight off of 5V.

For that reason, we are carrying it as a companion to the Adafruit RA8875 driver board in the store, which is a chip that can handle the huge video RAM and timing requirements, all in the background. That"s the best way to interface this display to just about any microcontroller (including Arduino & friends) If you want to control with from an HDMI or DVI output, check out our TFP401 driver board. If you are an advanced electronics enthusiast you can try wiring this directly to your processor, but it we don"t have any support or tutorials for that purpose.

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This 7.0" TFT screen has lots of pixels, 800x480 to be exact, an LED backlight and a resistive touchscreen overlay. Its great for when you need a lot of space for graphics or a user interface. These screens are commonly seen in consumer electronics, such as miniature TV"s, GPS"s, handheld games car displays, etc. A 40-pin connector has 8 red, 8 green, and 8 blue parallel pins, for 24 bit color capability.

This version has a 4-wire resistive touchscreen attached It"s exactly the same TFT display as PID 2353 but with a resistive touch panel so it is a little more expensive.

This is a "raw pixel-dot-clock" display and does not have an SPI/parallel type controller or any kind of RAM. The display is supposed to be constantly refreshed, at 60Hz, with a pixel clock, V sync, H sync, etc. There are some high end processors such as that used in the BeagleBone that can natively support such RGB TTL displays. However, it is extremely rare for a small microcontroller to support it, as you need dedicated hardware or a very fast processor such as an FPGA. Not only that, but the backlight requires a 125-150mA constant-current mode boost converter that can go as high as 9V instead of our other small displays that can run the backlight off of 5V.

For that reason, we are carrying it as a companion to the Adafruit RA8875 driver board in the store, which is a chip that can handle the huge video RAM and timing requirements, all in the background. That"s the best way to interface this display to just about any microcontroller (including Arduino & friends) If you want to control with from an HDMI or DVI output, check out our TFP401 driver board. If you are an advanced electronics enthusiast you can try wiring this directly to your processor, but it we don"t have any support or tutorials for that purpose.

This 7.0" TFT screen has lots of pixels, 800x480 to be exact, an LED backlight and a resistive touchscreen overlay. Its great for when you need a lot of space for graphics or a user interface. These screens are commonly seen in consumer electronics, such as miniature TV"s, GPS"s, handheld games car displays, etc. A 40-pin connector has 8 red, 8 green, and 8 blue parallel pins, for 24 bit color capability.

This version has a 4-wire resistive touchscreen attached It"s exactly the same TFT display as PID 2353 but with a resistive touch panel so it is a little more expensive.

This is a "raw pixel-dot-clock" display and does not have an SPI/parallel type controller or any kind of RAM. The display is supposed to be constantly refreshed, at 60Hz, with a pixel clock, V sync, H sync, etc. There are some high end processors such as that used in the BeagleBone that can natively support such RGB TTL displays. However, it is extremely rare for a small microcontroller to support it, as you need dedicated hardware or a very fast processor such as an FPGA. Not only that, but the backlight requires a 125-150mA constant-current mode boost converter that can go as high as 9V instead of our other small displays that can run the backlight off of 5V.

For that reason, we are carrying it as a companion to the Adafruit RA8875 driver board in the store, which is a chip that can handle the huge video RAM and timing requirements, all in the background. That"s the best way to interface this display to just about any microcontroller (including Arduino & friends) If you want to control with from an HDMI or DVI output, check out our TFP401 driver board. If you are an advanced electronics enthusiast you can try wiring this directly to your processor, but it we don"t have any support or tutorials for that purpose.

that 7 inch display uses the RA8875, you can see that on the specification of the display. The 320x240 uses the ili9341 (that is why the name of the library is ili9341).

I found two libraries, I don"t think they will be optimized for the Teensy. Test this one https://github.com/sumotoy/RA8875 and this one https://github.com/adafruit/Adafruit_RA8875

The only 7 inch I"ve seen around are RA8875 (4 wires plus 3 for Touch and int) or SED (16 bit plus several wires more, together with I2C for the capacitive touch will leave you with almost no port left).

In summary.. the display will work, and is most likely that the capacitive IC will also work read this (https://github.com/sumotoy/RA8875/wiki) so you are aware of the library limitations.....

Based on your replies, the 7 inch LCD we found "should" work, uses RA8875 controller, and there are at least (2) libraries which "should" work, but may need

NOTE: This SD holder has useless resistors and capacitors, it will not work with fast CPU and can create problems with SPI bus due capacitors, i STRONGLY suggest you forget it!!!!

The SD holder mounted on buydisplay will not work, you can get working at incredible low SPI speed but sincerily I never get really working, they mounted capacitors, series resistors and prolly pullups.

To get an SD work you should isolate the RA8875 with the circuit I described in github wiki, get a quality SD holder (like the one mounted in the PJRC audio board) and mount very near Teensy (or you can use the SD card holder homemade adaptor described here (https://forum.pjrc.com/threads/16758-Teensy-3-MicroSD-guide?p=56149&viewfull=1#post56149).

But you have to isolate the RA8875 wiith a small circuit described here (https://github.com/sumotoy/RA8875/wiki/Fix-compatibility-with-other-SPI-devices) or it will not work!

Just a note, the RA8875 it"s not the best chip to send images, it"s extremely fast driving his accellerated geometric primitives, internal fonts, etc, etc. but receiving pixels it"s a slow business.

The best way I found it"s send an entire line, better than one pixel a time but still not efficent, I"m actually cannot find another way in datasheet, so don"t expect to read large images in less a second on a 800x480 display, it will take not less than 3 secs using the max SPI speed and a SDholder very near to Teensy with a high speed SD card.

The RA8875 has a separate SPI that can drive internally (very fast and using DMA) a SPI flash chip, it looks promising but it"s a bit complicated since you have to program SPI Flash chip separately, I will test this option in near future since the library already support that.

The library can use any permitted Teensy 3.0,3.1 and LC configuration, it"s compatible with the PJRC Audio Card and it"s SPI Transaction compatible, it works well with the new SD optimized for Teensy library by Paul. Datasheet on hand the RA8875 has a SPI limit of 12Mhz but (after weeks of testing) actually I"m driving it at 22Mhz without problems by modulating SPI speed on some register so when you work with that SPI speed you always have to use short cables and good decoupling, it can work with a good quality breadboard but use always short cables and be sure contact it"s good.

The RA8875 library already support it internally, don"t need an external FT5206 library, just go to RA8875UserSettings.h file and uncomment #define USE_FT5206_TOUCH.

It"s correct, but you missed the TC_INT pin for the Touch screen (try pin 2) and you MUST use 2 pullup resistors on SDA and SCL (2 x 2k2 resistors between each I2C line and 3V3).

Note that ER-TFTM070-5 uses a lot of current for backlight, you will need a separate supply! In that case you need to wire the RST pin as well (any free Teensy pin should work).

Some user configured ER-TFTM070-5 at 5V and they are able to drive it by 5v from Teensy but you can easily get garbage on screen because the voltage should be at list 4.8V and stable, not less.

The reason it"s simple, the RA8875 chip it"s like a microcontroller, you send a command and you have to wait it finish it so you are forced to polling it"s busy port or use an INT for that.

The RA8875 it"s a great controller, actually it"s the only one that uses very tiny microcontroller resources (you can use a 800x480 16bit color display with 5 concurrent touches, actually impossible with any other display).

If you are cool with 3-4 sec loding time, you ca use it, or better try the internal SPI flash method that I never tested but should work, on-paper it can transfer images by using internal RA8875 DMA very fast.

To get faster speed you need to go to SSD series chip, they work with 16bit data so use a lot of pins but they can work as frame buffer so sending pixel data it"s a fast business.

In contrast you will use a lot of microcontroller resources (and RAM), remember you are using a tiny microcontroller not a CPU with 1 or 2 gig ram like raspberry.

If the price it"s not a problem there"s alternatives that use a complete graphic subsystem (with SD card support) that you can drive by SPI or serial , but they cost a lot!

C:\Program Files (x86)\Arduino\libraries\RA8875-0.70\RA8875.cpp: In member function "void RA8875::_charWriteR(char, uint8_t, uint8_t, uint8_t, uint16_t, uint16_t)":

C:\Program Files (x86)\Arduino\libraries\RA8875-0.70\RA8875.cpp: In member function "void RA8875::_drawChar_unc(int16_t, int16_t, int16_t, const uint8_t*, uint16_t, uint16_t)":

About the powerup sequence... It"s normal that you power up the LCD first! The Teensy has to be able to initialize the display when it power ups but LCD it"s not on, Teensy will start to initialize...nothing.

I strongly suggest (in that case) to use always the RST pin, the RA8875 get ready sooner that Teensy and Teensy it"s still able to reset it and initialize correctly.

About 7" supply (and why it needs a separate supply), the 7" model has a backlight that suck a lot of current, too much for any USB. I have a PC that is able to give more than 500mA on USB but I have noticed some garbage on screen from time to time, this was caused by the supply voltage that was not stable and modulate from 4.90V to 4.45V, setting brightness to 150 stabilized to 4.80V.

On Eastrising boards (and Adafruit) the backlight it"s handled internally by RA8875 using an internal PWM generator and this is why (if RA8875 it"s not correctly inited) it appears completely black with no apparent life, in contrast with other displays where you get the backlight on (at list) but thanks to this you can setup your display to consume less power by adding brightness(nnn) after initialization, I was able to supply this large 7" beast with a battery by using 150, 120 value.

Sorry for the horrible english of the message, I fix it in a min. This message appears when you open the capacitive touch screen example and your library it"s not configured for that.

This tells library to include the FT5206 routines that handles capacitive touch screen. The 7" screen uses an external FT5206 chip as capacitive touch but RA8875 handles only resistive touch internally so this command enables the correct routines.

The RA8875UserSettings.h contains a lot user defines, this is necessary for tune the library in relations your needs. You will notice that once enabled #define USE_FT5206_TOUCH many examples will give you an error caused by the FT5206 routines that needs the wire.h to be included.

The strange message you got was caused by bad LCD initialization since the message on sketch it"s correct. Please check the lenght of your wires and supply voltage during all initialization so see if change...

I" own Eastrising 7" capacitive as well and of course a Teensy 3.1, tried with adafruit library until I come across you library last week and I"m so impressed! It"s fast, much faster and impressive amount of features.

I would like to thank you for all your work, I really appreciate all the small things like CENTER (that really center text in relation his lenght and size) and all the text management but also the graphic commands, all useful!

I"m waiting your 0.70b11 with the accellerated render text you are talking about, actually text rendering it"s a bit slow and the font converter application.

I just have found a (maybe) bug, the capacitive touch screen works well but I have noticed that the fifth touch return inconsistend data sometime, not a big issue now but maybe better investigate.

About 0.7b11, I"m still working on the new font rendering function but I can tell that it"s already 2 or 4 times faster and will be much faster when finished.

For the font conversion utility I have to wait the original author accept my pull requests, but if you have some "free" font to convert feel free to suggest on github.

The Eastrising 7" it"s a real current sucker, several users reported problems by tyring to power up with USB and LDO"s, some noticed that voltage drops continuosly, some others noticed undervoltages (around 4.20V and less).

A really simple test it"s put a brightness(150) command just after begin in setup, this will cut a lot the current of the backlight and stabilize the voltage (that don"t continue drop down), this is useful to check if the Power Supply affects the code because undervoltages and drops.

Glad you have working, for the list of commands it"s in my ToDo list but in the maintime I"ve filled the library with so many examples that you can play for a while and understand with practice how to use it (I put also several comments around)...

The example shows the screen that react from 1 to 5 concurrent touches (by a different colour for every concurrent touch) and detect also some other parameters like gesture (all hardware detected by Touch IC)

Try to check if the TC INT pin goes low when you touch screen! If yes, maybe add a 10K resistor between TC INT and 3V3 as pullup may help but in my tests was not necessary.

Looking better you image I"ve noticed that Connector 6 it"s not used and just over it there"s the U8 IC that should be the FT chip! In your case there"s no chip at all...

I"m pretty sure that you don"t have any capacitive touch actually present, maybe it"s a resistive one but can be a 7" display without any touch capabilities!

It"s not easy to use the flash chip on RA8875 since you need to program flash BEFORE solder on RA board, once soldered you can use the library functions to access it.

The RA8875 access the flash chip from an internal separate SPI trough his DMA internal routines but there"s no way to "see" the chip or it"s content from outside once soldered.

I cannot find a reliable way to mount a DIP in the RA PCB where the flash chip have to be soldered, this will solve the problem since you mount the flash chip on DIP adaptor and it"s easy.

I wroted already a note to Eastrising (about this and the nonsense capacitors in the SPI lines) but never respond, Buydisplay are more gentle but actually the just sell and not produce the board.

Hard but this is how it was designed, probably they have in mind commercial products and not DIY, I never tested really the functionality but I have an application note that explain how to access flash chip from a different SPI line, unfortunatly this needs several PCB modifications and Eastrising doesn"t included the ability to do that, this is why they provide the SPI flash loose and not soldered when you order (the Font ROM they provide already soldered).

In theory you can prepare some images in the SD card and when you are sure you can transfer to the SPI flash but the RA8875 access the images on flash by using an offset and image lenght so I"m not sure the images are tranferred from SD to Flash have this format.

Have to tell that using SD with such a large screen in serial SPI it"s a slow business and there"s no way to accellerate until you use 16bit parallels will use almost all your microcontroller pins.

What about try to mount a DIP to SMD adaptor on the display? If you mount your Flash chip on a DIP adapter you will able to program externally then mount on display by just plug it. I"m not a great SMD solder but I"m sure there"s a way to do that.

Using I2C flash for images? I2C it"s really slow! the display works at 22Mhz and you are plan to use max 400Khz from I2C device, I don"t think it"s a good idea.

Maybe better use a SPI Flash (and follow the RA8875 SPI isolation described in the wiki to avoid SPI collisions), I don"t know how much fast is the SPI flash in reading, for sure there"s some expert here that can help in this.

The RA8875 based displays are just regular LCD with a controller a bit more sofisticated than usual, the RA chip has hardware accellerated graphic primitives, some internal font stored inside, a RAM buffer for the entire screen (plus some more bytes for extra fonts and patterns) and a dedicated SPI for external ROM font and a Flash Chip, quite a lot but not so powerful as the 4D system that can really store images, maybe consider one of those (expensive) displays for your application?

You want to store images in the display.... Where? The display has a buffer RAM and at 800x480 it"s limited at 8bit and the Flash memory on the LCD it"s read only since it stays in another SPI dedicated bus, you cannot send images to flash trough RA.

Also, when you load the image you are forced to use pixel stream that it"s visible, the only way to hide the process it"s turn off screen (but not the RA chip), send the image and when it"s finished turn on screen.

The Eastrising 7" it"s a real current sucker, several users reported problems by tyring to power up with USB and LDO"s, some noticed that voltage drops continuosly, some others noticed undervoltages (around 4.20V and less).

I have found that older thread. It is matching what I am trying to do... I have ordered the same display and want to used it with Teensy 3.2 and Audio. So, my problem is, that the PINs that are used for that TFT are allready used for Audio... What can I do?

I have found that older thread. It is matching what I am trying to do... I have ordered the same display and want to used it with Teensy 3.2 and Audio. So, my problem is, that the PINs that are used for that TFT are allready used for Audio... What can I do?

The Audio shield uses 18/A4 and 19/A5 for the i2c bus, which allows other devices to be connected to the bus, assuming they have a different i2c bus than the devices already in use. The Audio board uses addresses 0x0A and 0x1A.

The Audio shield also uses the SPI bus, but you have to use two alternate pins (you have to use pin 7 instead of pin 11, and pin 14/A0 instead of 13). In addition, you need to change the CS pin (chip select) to be a pin that isn"t used by anything else. Some devices need to use the special hardware chip select pins, and you would need to use 20/A6 or 21/A7 if the display has the special optimizations.

ah, OK.... yes, I understand... so, I2C is able to drive some more devices on the same Bus... so I can use the same PINs... But that is not possible for SPI... so thats why I need to use different SPI- PINs 1 and 14 and CS PIN 20...

The audio board uses pin 14 as SCLK (instead of 13), pin 7 for DOUT/MOSI (instead of pin 11), pin 12 for DIN/MISO as SPI pins. You can share SPI devices, using SCLK, DOUT/MOSI, and DIN/MISO for all devices, providing each device has a separate chip select (CS) pin. If you are not using the standard pins, you have to tell SPI about the alternate pin usage.

In addition, most of the displays have a second pin (D/C) that flips between data/command, and this pin also must be a special CS pin. In the displays I"ve looked at (ST7753, SSD1351), there is a reset pin, but that pin does not have to be one of the special pins.

This means of the special pins, you have only pins 20/A6 and 21/A7 (pins 9, 11, 13, 22, and 23 are used for i2s; pin 15/A1 has resistors/etc. for soldering a volume switch to the board).

The only problem I"ve found with the 7" display is the pixels are not square, so when you draw a circle it is not completely round. Makes displaying gauges not look right.

That means that you"ll simply have to add a #define for the aspect ratio and to tweak the drawing functions in the library for a simple linear correction.

its me again... So display is working very nice.... :-) But when I am trying to add some code (what is in /* */ in setup() ) for Audio-shield the display stopps working... So what is going wrong?

In the meanwhile I have tryed some things... and found out, that TFT- problems starts when SD- Card is in the Audio-shield-slot... w/o any changes in code...

And so I read some postings to that issue and found that there might be a problem with RA8875- SPI and other devices on the same line. So TFT is ussing PIN7 on teensy for MOSI, PIN8 for MISO and PIN14 for CLK.

Audio Board uses (?) PIN7 for MOSI too and PIN12 for MISO... PIN11 could also be used as MOSI, but is allready used from Audio-Board... so what can I do? Would it be better to use PIN11 for TFT? But what should I do with that connection to Audio-Board?

If you are going to use the Audio board, you need to use the same SPI pins for SCLK (i.e. pin 14/A0 instead of 13), MOSI (i.e. pin 7 instead of pin 11), and MISO (pin 12) for your device. You can"t use either pins 6 or 10 for the CS since those are used by the Audio board. See this https://www.pjrc.com/teensy/td_libs_SPI.html and scroll down to the section on Alternate Pins.

Or if you have a Teensy 3.5, 3.6 or LC, there are alternate SPI ports that you could use. You would have to modify the library to use SPI1 or SPI2 instead of SPI.