teensy fast tft display for sale

The version of this library, in which we have worked for a couple of years, is 100% functional for teensy 3.6 and teensy 4. With my brother lightcalamar, and with the support of the good nopnop2002, we managed to respond to the question: What screen to use in teensy 4 or teensy 3.6 to give a decent use to the SDIO reader?

The cost of such screens is an interesting challenge at the beginning, however the investment is well worth it, by seeing what can be designed in the TFT. It hasn"t stopped surprising me since I had my first gameduino 2 on the worktable.

As if that were not enough, Greiman recently gave us the SdFat beta library, which is compatible with the SDIO reader of teensy 4, and that by tests we have proven that it also works in the teensy reader 3.6.

FASTRUN - Functions defined with "FASTRUN" are allocated in the beginning of RAM1. A copy is also stored in Flash and copied to RAM1 at startup. These functions are accessed by the Cortex-M7 ITCM bus, for the fastest possible performance. By default, functions without any memory type defined are treated as FASTRUN. A small amount of memory is typically unused, because the ITCM bus must access a memory region which is a multiple of 32K.

Local Variables - Local variables, and also return addresses from function calls and the saved state from interrupts are placed on a stack which starts from the top of RAM1 and grown downward. The amount of space for local variable is the portion of RAM1 not used by FASTRUN code and the initialized and zeroed variables.

EXTMEM - Variables defined with EXTMEM are placed in the optional PSRAM memory chip soldered to the QSPI memory expansion area on bottom side of Teensy 4.1. These variables can not be initialized, your program must write their initial values, if needed.

FASTRUN - Functions defined with "FASTRUN" are allocated in the beginning of RAM1. A copy is also stored in Flash and copied to RAM1 at startup. These functions are accessed by the Cortex-M7 ITCM bus, for the fastest possible performance. By default, functions without any memory type defined are treated as FASTRUN. A small amount of memory is typically unused, because the ITCM bus must access a memory region which is a multiple of 32K.

Local Variables - Local variables, and also return addresses from function calls and the saved state from interrupts are placed on a stack which starts from the top of RAM1 and grown downward. The amount of space for local variable is the portion of RAM1 not used by FASTRUN code and the initialized and zeroed variables.

CC3000 is troublesome, partly because it uses SPI_MODE1, partly because it uses the SPI port from within an interrupt. Adafruit’s CC3000 library has code to backup the AVR’s SPI registers, change them to MODE1, and then restore when it’s done, so the conflicting clock polarity isn’t (usually) an issue on AVR. But on Due, Teensy 3.1 and all other non-AVR chips, their specific SPI registers aren’t also in the code, so you can pretty easily end up with the SPI port left in the wrong mode.

Interrupts are also a huge problem. Using the CC3000 in simple blocking ways, where you fully complete all communication before you try to write to the display or read the touch screen or access the SD card tends to work. But if you use another device while the CC3000 generates an interrupt at just the wrong moment, it can run its SPI code while another device has chip select asserted, causing all sorts of terribly wrong results.

The touch controller on Adafruit’s displays comes in a couple different types, which need different SPI data modes, and some require very slow clock speeds. Again, they have AVR-only register save/restore, so usually you don’t get wrong settings into other libraries, but there’s no hardware specific code in those libs for non-AVR chips.

My recent work on SPI transactions, which will be in Teensyduino 1.20 (already in the latest release candidate and on github) and is planned for Arduino 1.5.8 (already in their github source and nightly builds) aims to solve both the settings and interrupt problems, in a hardware independent way. Adafruit has already merged my patches to their libs, at least for these most common ones, so they use the new SPI transaction stuff when compiled on those new versions.

...use them on all my projects. I"ve bought about 8 so far and can get them to work with either Teensy 3.2 or an Arduino Nano. For operation with a Teensy 3.2 1. use the from the PJRC--and this lib is very fast connect...

I sorry, the microSD with the ILI9341 nope at this moment. But with FT813 + gameduino library + SdFat_beta, work it surprisingly well in teensy 4. Later I share the library; It is work in process.

I have been working with a similar library: the ILI9488_t3. Until a few minutes ago, the XPT2046 touch chip did not work on the Teensy-4. The key is the file HW_ARM_defines.h inside of the path: URTouch\hardware\arm

Teensy 4.1 is the most powerful Arduino compatible microcontroller available today.  Based on the NXP i.MX RT1062 ARM Cortex-M7 running at 600MHz with the ability to be overclocked.   It is formatted into a very compact ‘teensy’ board outline for easy embedding into projects or for use with solderless breadboards.  Perhaps best of all, it is compatible with the popular Arduino IDE programming environment as well as many of the existing Arduino libraries, so it is very easy to get up and running unlike many other advanced microcontrollers that are available.

The Teensy 4.1 modules are exactly the same except the NE version is missing the Ethernet PHY chip as shown here.  This chip provides the interface between the Ethernet controller built into the NXP microprocessor and the physical Ethernet cable.

Some Teensy 4.1 are now being built without this chip due to on-going PHY chip shortages plus a price increase on the part.  If you don’t plan to use wired Ethernet, the NE version is a good option to consider since it is a little less expensive than the standard version and otherwise identical.

The Teensy product line which is focused on being fast , small and Arduino compatible is developed by the company PJRC.  They have a loyal following of designers and advanced hobbyists that create many libraries to take advantage of some of the more advanced features of the Teensy products or to modify Arduino libraries for compatibility.  Many of them also participate in the excellent PJRC forum.  The forum is targeted towards more advanced users and topics.

Just how fast is it?  The chart below shows the Teensy 4.x series compared to some other popular boards using the CoreMark Benchmark test.  Larger numbers = faster performance.

As another example, the classic Mandelbrot set was calculated and displayed using a Mega 2560 which took between 77 and 105 seconds per image.  Calculating the image is very mathematically intensive.  The Mega 2560 was then swapped out for the Teensy 4.1 and it took 1.24 to 1.26 seconds for the same task running the same software on both.

The Cortex-M7 is the first ARM microcontroller to use branch prediction. On the M4 as used on the Teensy 3.2, loops and other code which must branch take three clock cycles. With M7, after a loop has executed a few times, the branch prediction removes that overhead, allowing the branch instruction to run in only a single clock cycle.

Teensyduino automatically allocates your Arduino sketch code into ITCM and all non-malloc memory use is allocated to the fast DTCM, unless you add extra keywords to override the optimized default.

Teensy 4.1’s Cortex-M7 processor includes a floating point unit (FPU) which supports both 64 bit “double” and 32 bit “float”. With M4’s FPU on Teensy 3.5 & 3.6, and also Atmel SAMD51 chips, only 32 bit float is hardware accelerated. Any use of double, double functions like log(), sin(), cos() means slow software implemented math. Teensy 4.1 executes all of these with FPU hardware.

If you need/want all the horsepower but don’t necessarily need all the I/O and peripherals found on the Teensy 4.1, the Teensy 4.0 uses the same microcontroller in a smaller physical footprint that is also a little less expensive.

To program the Teensy using the Arduino IDE, you must first have the IDE installed if it is not already.  If it is installed but not the current version, now is a good time to update to the latest.

When Teensyduino is running which it should do automatically, a small window is opened on the desktop.  This is the Teensy Loader application that handles the actual download to the Teensy board.  Most of the time you can ignore this window as it defaults to Auto Mode which means it will take care of automatically downloading to the Teensy without needing to press the Teensy Program button, but it does need to be running in order to download to the Teensy boards.

If the setup is correct, the software will compile and download to the Teensy.  The onboard LED should start blinking once per second.  Since the board will already have Blink installed when you receive it, you might want to change the timing of the blink to verify the new download was successful.

The Teensy 4.1 operates at 3.3V internally and expects I/O to not exceed 3.3V.  It is not 5V tolerant on any of its pins except for the VIN and VSUB pins which can be used to supply 5V power to the module.

The Teensy 4.1 can be powered one of 3 different ways, but it is important to note that these are mutually exclusive unlike typical Arduino boards.  Internally the module does not provide any power switching between the different power inputs.  In essence, if you hook up two different power inputs such as through the USB cable and also through the VIN pin, those two power sources will be shorted together.

External power of 3.3V can also be applied to the 3.3V pins to power the Teensy in some cases, but this bypasses the on-board regulator which properly handles the power up sequence.  This option is not recommended without doing some research.  Specifically, VBAT needs a 3V power source such as a coin cell before applying power to the 3.3V pins.

The most likely way to run into trouble with power is by having the Teensy normally powered through VIN and then deciding to hookup the USB cable to download new code without disconnecting VIN first.

The USB port on the Teensy 4.1 has significant functionality not available on a normal Arduino.  For most standard applications it should be set to the default “Serial” mode which is how it works with an Arduino.  If you have problems connecting to the Teensy, check this setting.

The button on a Teensy board is not a typical reset button like on an Arduino.   When pressed, the program button causes the Teensy to enter ‘Programming Mode” where it waits for a download over USB.  If the Teensy is connected to the IDE via a USB cable, the last program will automatically be downloaded again and ran.

You didn’t select the Teensy 4.1 because it has a slow CPU, so naturally you are going to notice the CPU speed selection available in the IDE while poking around.

There are two 8-pin SMD footprints on the bottom of the module under the SD card slot.  The user can add chips to these locations to enhance the functionality or they can buy our preassembled and tested Teensy 4.1 Fully Loaded products near the bottom of the page.

These chips come in the WSON package that have the leads tucked under the body and require decent soldering skills to solder on well.  The Teensy 4.1 Fully Loaded product at the bottom of the page has these parts already installed.

These chips come in the WSON package that have the leads tucked under the body and require decent soldering skills to solder on well.  The Teensy 4.1 Fully Loaded product at the bottom of the page has these parts already installed.

Parts are available for adding a physical Ethernet port to the Teensy 4.1.  This is available as either a kit that requires some soldering or as a fully assembled board.

One of the 2×3 male headers in the kit is soldered to the Teensy 4.1 in the location as shown to the right for connecting the ribbon cable.  This part is a little trickier to solder due to tight spacing of small components on the bottom of the board.

Due to the strong processing power available in the Teensy products, they are a popular target for audio projects whether it is playing multiple WAV files simultaneously, synthesizing music or building sound reactive projects.  The Audio Adapter 4.x (Rev D) is designed for the Teensy 4.x product line and supports high quality 16-bit 44.1kHz sample rate (CD quality) audio.

For anyone that wants to attach probes, logic analyzers or jumpers directly to the Teensy 4.1, we have these high quality extended tail gold headers in 1×40 strips.

If the Teensy 4.1 sounds great but the soldering of SMD chips sounds less great, we have the Teensy 4.1 Fully Loaded.  It has either 8MB PSRAM & 16MB/64M-bit Flash memory, 8MB PSRAM & 128MB/1G-bit NAND Flash, 8MB PSRAM & 256MB/2G-bit NAND Flash or 16MB/128M-bit PSRAM chips installed and fully tested.  It also has the pins soldered on and has the header for the optional Ethernet added as well.

If you are looking for Teensy 4.1s that are configured to work with our Prototyping System for Teensy 4.1 or another baseboard that brings the VUSB, Ethernet, USB Host and VBat headers down from the bottom of the Teensy as well as having the VUSB trace cut and diode added to isolate USB and VIN power we have those as well.  Please note that these will not plug into a solderless breadboard due to the additional headers on the bottom of the module.

You can find the link to the full Teensy 4.1 Fully Loaded for Prototyping System information at the bottom of this page or by clicking on the pic above.

The Teensy line of boards are an excellent product that provides high performance and advanced I/O to tackle even the hardest problems which is why they are often found in advanced hobbyist projects as well as low volume production builds.

The PJRC forum provides access to excellent technical advice that is far more advanced than found on the normal Arduino forums.  It is the best place to find information on how to use the advanced features found in the Teensy.  It is not the place to get basic Arduino type questions answered however, which is good as the forum is not cluttered with ‘how do I blink an LED?’ type questions.

The Teensy 4.1 is currently at the top of the heap for performance and I/O capability.  You do need to take care of properly applying power and keeping I/O limited to 3.3V to avoid possible damage to the module.  If you are brand new to Arduino and programming, you might consider getting your feet wet with a standard Arduino clone board or consider the 5V tolerant Teensy boards like the Teensy 3.2 and Teensy 3.5 which are a little more fool-proof.

There are some other Teensy products that may be better suited depending on the application.  The Teensy 4.0 has the same CPU and basic performance, but in a smaller physical package with less I/O, 2MB of FLASH and is less expensive.  The Teensy 3.5 has a similar I/O footprint as the Teensy 4.1 and provides 5V tolerant I/O and it runs at 120MHz which is still way faster than the typical Arduino board.  The Teensy 3.2 is a mature product with the largest installed base and is in a small package format with 5V tolerant I/O and runs at 72MHz.

I have several 3.5 inch MCUFRIEND touch Screens with the Red Board and are labeled "www.mcufriend.com 3.5" TFT LCD for arduino uno". Using this library the Red board touchscreens work on the Due and the Mega 2560, but on the Teensy 3.6 they do not work.

Using the Blue Board, this library works with Due, Mega 2560, and the Teensy 3.6 (Thank you for this change that allows me to use the Blue Board with the Teensy 3.6, Lightning speed graphics),

On Due and Mega the get ID on the Red Board Comes back as Unrecognized and uses TFT.begin as set to use 0x9486 by default. This does not work on Teensy 3.6.,

On Due, Mega, and Teensy 3.6, the get ID on the Blue Board Comes back as found "0x9486" and uses TFT.begin as set to use 0x9486. This works without issue.

I have a case of the Red boards and would love to use them with the Teensy 3.6" if you can reconfigure the library to work with them. I would be willing to send you a Red Board and a Blue Board for free to keep if this would be helpful with debugging. This is the least I can do for all of your help you are providing to us. Very, Very grateful for being at least able to use with the BLue Board.

There"s different strain of this display on ebay, I have try to tracking all of them but may missing some species! Actually the more popular has a RED pcb and a BLACK pcb that are completely same pcb but mount a different display that need some tweaking, in particular RED ones need offset but also some tweak for colors, etc. In the .h file in the library try to comment out one of the presets:

For the teensy 4.1 you might be able using flexio block to build an alternate 16 bit mcu interface. That means the real frame buffer has to remain in the screen. It means that the lcd module you will buy needs to have an internal ram . Rgb 16/24 bits lcd with pclk cannot be used unless you build with flexio a real lcd pixel interface. There is an app note on nxp website about using flexio like that for kinetis cpus ( cpu is différent but flexio block is the same)

This is a new version of the popular Teensy 4.1 but without the Ethernet chip onboard. Why? Because those pesky chip shortages are proving a real headache for the nice folks at PJRC! As many Teensy users don"t need or want the Ethernet features, this was a nice solution to continue providing the much-loved Teensy 4.1 to makers across the planet.

The Teensy 4.1 features the fastest microcontroller and an expanded set of powerful peripherals in a 2.4"x0.7" form factor and can be programmed using the Arduino IDE with Teensyduino add-on.

Teensy 4.1 & 4.0 use the same IMXRT1062, so most technical specifications are the same. Please refer to the Teensy 4.0 page for common specifications and features.

Teensy 4.1 is designed to bring all general-purpose I/O pins to breadboard-friendly pads on the outside edges. Teensy 4.1 has a total of 55 input/output signal pins. 42 are easily accessible when used with a solderless breadboard.This pinout reference card comes with Teensy 4.1 (front / back).

The bottom side of Teensy 4.1 has locations to solder 2 memory chipsThe smaller location is meant for a PSRAM chip. The larger location is intended for flash memory.

The PSRAM chip is meant to be soldered to the smaller pads on the bottom side of Teensy 4.1, underneath the SD card socket, between pins 31-32 and 33-34. Do not use the larger pads. A single PSRAM chip must be soldered to the smaller pads to be detected.

Teensy 4.1"s USB Host port allows you to connect USB devices, like keyboards and MIDI musical instruments. A 5-pin header and a USB Host cable are needed to be able to plug in a USB device. USB hubs may be used if more than 1 device is needed.

Performance - ARM Cortex-M7 brings many powerful CPU features to a true real-time microcontroller platform. CPU performance is many times faster than typical 32 bit microcontrollers.

Tightly Coupled Memory - Tightly Coupled Memory is a special feature which allows Cortex-M7 fast single cycle access to memory using a pair of 64 bit wide buses. The ITCM bus provides a 64 bit path to fetch instructions. The DTCM bus is actually a pair of 32 bit paths, allowing M7 to perform up to 2 separate memory accesses in the same cycle. These extremely high speed buses are separate from M7"s main AXI bus, which accesses other memory and peripherals.

Arduino IDE + Teensyduino - Arduino"s IDE software with the Teensyduino add-on is the primary programming environment for Teensy. On Windows, Linux and old Macs, Arduino is installed first and then the Teensyduino installer adds Teensy support to the Arduino IDE. On newer Macs, an all-in-one download is provided. Teensyduino includes a large collection of libraries which are tested and optimized for Teensy. Other libraries may be installed manually or by Arduino"s library manager.

Visual Micro - Visual Micro allows use of Microsoft Visual Studio to program Arduino compatible boards, including Teensy. Only Windows is supported. Visual Micro is commercial paid software.

CircuitPython - CircuitPython provides a .HEX file which you program onto Teensy 4.1 using Teensy Loader. Then Teensy appears to your computer as a USB disk, where copy or save your Python code. CircuitPython does not fully support all of Teensy 4.1"s hardware.

Most hobbyist electronics market color display is SPI and most Arduino Platform support SPI. Arduino_GFX utilize Arduino native SPI class as basic interface, HWSPI, so Arduino_GFX is already virtually ready for most platform and most display.

Arduino_GFX start rewrite from Adafruit_GFX and used many features from LovyanGFX and TFT_eSPI, but the high level design is a little bit like Ucglib. Arduino_GFX decouple display driver and data interface into 2 separate class. It gives much more flexibilities, for example, ILI9341 display can use:8-bit SPI

Arduino_GFX write as generic as possible to support multi-platform. Switching dev board no need to change any code related to GFX function. Switching display simply replacing the GFX class, e.g. switching ILI9341 display to ST7789 IPS display will be:// Arduino_GFX *gfx = new Arduino_ILI9341(bus, TFT_RST, 0 /* rotation */, false /* IPS */);

As you can see the the declaration in previous step, there are no need to pass the LED pin to both class. This is because the LED on or off is not controlled by the display driver, in most case it is direct controlled by the MCU GPIO. Sometimes it is controlled by a dedicated power control chips; Sometimes there is no LED backlight, e.g. OLED.

The most lazy way is just connect the LED pin to Vcc, but it may take a risk of burn out LED if the breakout board not have enough protection. So it is better using a GPIO:pinMode(TFT_BL, OUTPUT);

Arduino_GFX is not putting speed at the first priority, but still paid much effort to make the display look smooth. Let"s compare the speed with a most well known GFX library and 2 fastest GFX libraries.Arduino IDE: 1.8.15

Arduino_GFX write as generic as possible to support multi-platform; And use OO parent class to standardize various data bus class and display class API. These design have a little bit overhead.

Here is some design to make Arduino_GFX run fast:Tailor-made data bus classes. Arduino_GFX decouple data bus operation from display driver, it is more easy to write individual data bus class for each platform. E.g. NRFXSPI data bus class can run much faster than general HWSPI data bus class in Arduino Nano 33 BLE platform.

Stick to 16-bit color space. 24-bit color is overkilled for most MCU and also most color display support 16-bit color (except ILI948* in SPI mode). Stick to 16-bit color only can simplify the implementation, run faster and reduce library size footprint.

No read operation. Since not all display provide read back graphic memories API, Arduino_GFX skip read operations at all. It can reduce the library size footprint and sometimes reduce the operation time.

In early development stage, once I added the Arcs function to PDQgraphicstest example, I found it cannot fit in Arduino Nano. A display library used up all program space means you cannot do any thing in the project. It is not acceptable, so I raise an issue in GitHub myself:

When you design your display project, there are 2 variable hardware factors to consider:Dev board. Different dev board (platform) have different GPIO pins mapping and different interface (data bus) can be used. Also driving higher resolution color display smooth requires higher processing power.

First of all, it must have common interface between the dev board and display, most likely it should be 8-bit SPI. And then you need to allocate other GPIO control pins, e.g. CS, DC, RST and LED. If you do not have preference for using which GPIOs, Arduino_GFX already defined some default for ease of use.

The official SPI for Arduino Nano 33 BLE is a little bit slow for color display, it even much slower than Arduino Nano. It is a well known issue on the web, the reason may caused by a mbedOS in the middle. When I dig into the firmware source code, I found 9 internal classes related to SPI. I selected implement 2 classes. I think NRFXSPI implementation can meet the performance of 64 MHz main frequency, mbedSPI is just a backup plan in case NRFXSPI broken something in mbedOS.

AVR family is 8-bit MCU, running in 8 or 16 MHz, maximum SPI speed is 4 MHz. Seems not fast enough for color display, as show in the first video. How about 8-bit parallel? MCU can use port operation command direct access all GPIOs under same port in 1 instruction. So AVR 8-bit parallel interface (AVRPAR8) can run much faster than SPI. However, most AVR dev board not breakout enough pins for 8-bit port operation. E.g. Arduino UNO only break out port D all 8 GPIOs but use port D require sacrifice the serial port pins.

This is a round display with 240x240 resolution. Same as ILI9341, this display is not 5V I/O tolerant so it require some resistors between GPIOs and display pins if using 5V MCU like Arduino Nano.#include

This is an IPS display with 320x480 resolution. This display only support 9-bit SPI so it is better connect with ESP32SPI.#include

This is the highest resolution display I have in hand, it is 480x800. This display support 8-bit or 16-bit parallel interface.#include

The display only require refresh once after canvas draw finish and call flush(). It can reduce the display flicking substantially but requires more RAM.

Then declare canvas: (240x320 resolution requires 153600 bytes RAM)Arduino_GFX *gfx = new Arduino_Canvas(240 /* width */, 320 /* height */, output_display);

Some display support 3-bit color space like ILI9488. It is hard to direct implement 3-bit color space efficiently. But it can work with a Canvas_3bit class in the middle:#include

Arduino_GFX support create default display class accordingly to selected built-in display dev device in Board selection menu. Below are recognizable dev device:Wio Terminal

3_5TFT_SPI_GFX_nanoMQ5_ILI9486.ino:23:24: error: expected type-specifier before "Arduino_Canvas_3bit" Arduino_GFX *tft = new Arduino_Canvas_3bit(480 /* width */, 320 /* height */, output_display);

I have been trying to run your examples with my hardware and I am getting 2 errors that look to be issues between definition and constructors I am only a novice at coding and have so far not found where the problem is any help would be appreciated. I am using a pi pico and 2" waveshare display hat 320 x 240

The Teensy 4.1 has three different spi bus. Is there a way to assign pins other than the ones chosen by the Adafruit default bus? I only see where I can assign backlight and reset. I have an audio DAC on the default SPI bus.

Teensy-LC delivers an impressive collection of capabilities to make modern electronic projects simpler. It features an ARM Cortex-M0+ processor at 48 MHz, 62K Flash, 8K RAM, 12 bit analog input & output, hardware Serial, SPI & I2C, USB, and a total of 27 I/O pins. See the technical specifications and pinouts below for details.

Teensy-LC provide plenty of serial connectivity: 2 SPI ports, 2 I2C, and 3 Serial ports. All 3 serial ports are supported by high quality drivers in Teensyduino, with both transmit and receive buffering, and even support for RS485 transmitter enable.

Teensy-LC will be ideal for inexpensive "Internet Of Things" projects when paired with a ESP8266 Wifi module, which requires a fast hardware serial or SPI port.

Teensy-LC supports USB Serial, MIDI, Keyboard (international layouts), Mouse, Joystick, and RawHID protocols. A full set of 16 bidirectional USB endpoints are supported by the hardware, allowing any type of USB device. As more USB protocols are added to Teensyduino, despite its low cost, Teensy-LC will be up the task.

Teensy-LC has a total of 7 timers, all of them with 16 or more bits of resolution, to allow excellent compatibility with easy-to-use libraries. Many combinations of popular libraries, which would normally conflict, can seamlessly run together on Teensy LC and Teensy 3.2.

Analog signals are critically important to many projects. Teensy-LC has 13 pins than can function as analog inputs. The effective analog resolution is 12 bits.

Cortex-M0+ has fewer instructions and a simpler bus structure than the more powerful Cortex-M4 on Teensy 3.2. For simple code, M0+ often runs at similar speed, when running at the same clock frequency. For math-intensive applications, Cortex-M4 can be significantly faster, and of course it supports higher clock rates.