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There is a library for Teensy 4.x that works amazingly with LVGL. It is called ILI9341_T4. Maybe that library can be ported to support ST7789? It has super high performance, VSync and a lot more nice features.

Hello, It is sort of working. I did get a massive FPS boost ( before 68 now 1004! ), but now there's some artifacts. Here is a video showing the artifacts (edit) Is there a way to change the display's SPI clock speed?

Well, I did some changes and it "works" now, but I get issues running a display and the audio library at the same time. Here is a video of my issue. The code is this.

I connected everything for I2S2. It works better if I leave the MCLK pin disconnected for some reason. When I connect MCLK to SCLK on the DAC, I only get noise no matter what I do. Leaving it disconnected works better, maybe there is something needed to configure the DAC so it needs a MCLK...

Hi, I have a library running (LVGL) with the ST7789_t3 driver on my Teensy 4.1, and I want to use DMA instead of blocking updates. Currently, this is my code. #include <Arduino.h> //LVGL>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> #include <lvgl.h> #include...

i have just realized I posted this in the wrong category. Moved to technical support. (EDITED)

I guess it is related, but I don't seem to be having any issues with the mute pin on it. Also, I noticed another thing, while using an SPI-TFT, the audio for some reason gets interrupted for a little (ILI9341). It is very short, but definitely noticeable, like when a CD skips a little every time...

With some resistor experimentation (I only have 13K ones) I managed to get it almost working, but there is still some noise sometimes which touching the wires completely eliminates. Tomorrow I will go to the electronic parts store, can you give me values of what components I should buy?

Hi! My only I2S DAC board I have available to purchase is a UDA1334 breakout by Adafruit, but it only works when I touch the pins of it, otherwise I just get noise. See the attached videos below.

This is the SPI version. It’s the easiest to use version. My ILI9341 display has an 8-bit parallel interface. And the ILI9342C needs a different driver than the ILI9341

Hi, I have ILI9341 with 8-bit parallel interface, ILI9342C with SPI interface and I have no idea how to get either working. Any ideas? I need quite high performance. Also, sorry to revive old topic.

Hello, I have a project where I have a TFT display and I'm using a display library that uses DMA. The display library is very fast, clocking in about 500 FPS, but for some reason if I play a wav (using a high-quality SD card in the builtin slot), I get a very high amount of stuttering while the...

As I promised:

I am running Linux (Ubuntu based distribution), using the latest version of Arduino (2. Something) and PlatformIO (I test with both of them everything). Teensyduino is also the latest version. There is one which now works which is a SanDisk and the other non-working one is a no name one that is...

Hello, I am using the example for USBHost_t3 library, I tried all the storage examples, but none of them work. They all fail to read from any of my flash drives. All my drives are formatted FAT32, with more than enough files inside for the list program to be able to list them. The HID example...

My USB cables are all with data, and I have indeed installed the udev rules. Using the same cables I can upload code to my ESP32. The computer doesn’t pick up the teensy at all when connected or disconnected with the watchdog command

Hello, I have installed Ubuntu on my computer today and I am having trouble uploading my code. I use PlatformIO IDE on my computer, and there on the terminal it says: Uploading .pio/build/teensy41/firmware.hex Opening Teensy Loader... error sending reboot command to /dev/hidraw0 Teensy did not...

Hi, I am currently using TFT_eSPI library for my display on my old microcontroller ESP32, but I got myself a Teensy 4.1 and I want to use optimised for it graphics libraries. I have chosen to use ST7735_t3 library as it has support for my display (ST7789V). I'm struggling to find these...

Hello, thank you for the idea of removing the display! I have just desoldered, thoroughly cleaned with isopropanol and then resoldered the flex cable in place and now it works like a charm. I have dropped it a few times, so that’s maybe why it’s like this.

Hello, I got my display from here It is a new display, everything is exactly the same as it appears in the hyperlink above as to in real life. I have made a mistake with pin alignment at least 4 times and I'm worried that that could have cause the issue, as I'm supplying the display with 5v...

I checked all pins of all the boards I used. Every single one worked fine.

Well, I’ve tried different breadboards, different MCU boards, different wires and even new headers for the LCD and nothing worked. ESP32, STM32F401 and the Teensy all can’t get it to work, only the stripes.

New thing, the display no longer works at all. I tried the old library which works, no results. Just stripes on the display and nothing else. Is there any way I could revive it?

VCC - Vin, Supply voltage is 5v

My display has no trouble running with 115 MHz at all, and I have tried adding the reset pin to the constructor, with the same error. I am also previously aware of the speed increase by using DC on the hardware CS pin from a different library.

Tested all pins individually, every single one works.

It was connected to such a pin, but configured for it in the constructor for the display.

Do you have such a library for ST7789 that supports the DMA? It could be useful with LittlevGL to get a nice rotary encoder UI.

Still not working, only stripes :(

What's the difference between ILI9341_t3n and ILI9341_t3?

There is a different library that doesn't have any GFX, but it works. Yesterday for some reason in the morning it was working with 3.3v, but later that day it only wanted to work with 5v. Giving the display 3v and with RST pin set I get a grey screen. EDIT: I tried an ST7789 240x320 with...

Well, there's an improvement. Now it displays some unusual stripes:

As I said, the code is identical as the one found in Examples -> ILI9341_t3 -> graphicstest, but just swapped CS and DC to #define TFT_DC 10 & #define TFT_CS 9

Hello, I am attempting to use the ILI9341_t3 library on my Teensy 4.1, but I get only a white screen and nothing else. The code used is the graphics test, but the display shows nothing but white. For a moment, it did work, but instantly went white again. All the wiring is the same as it s ays to...

It turns out it's from the wiring. The connections weren't making a good contact, I switched to a new breadboard, new wires and it started working correctly without holding it. Also, if you know, for me there is a popping sound every-so-often while using this. Is there any way to eliminate that...

I did, yes.

This is exactly what I'm doing, but there is no sound output

Hello, I got it working. I used an example to create a sine wave and it works just fine, I can hear the sine wave on the output clearly and adjust its frequency with the potentiometer I have connected, the issue here is the USB.

Hello, I got my Teensy 4.1 board and experimented a little running display and nice UIs from it, but I have decided to try out some audio. I have an Adafruit DAC, type UDA1334A. My goal is to use this DAC with my computer, using the Teensy as a USB audio device. The Teensy does get recognized by...

I am really stupid, thank you for your reply.

Hello, I have this old and destroyed ESP32 development board (TTGO T-Display) with 4 megabyte PSRAM chip on it, I am wondering if I can use this on my Teensy 4.1 when it arrives. I have identified the chip as such: W25Q32JV If it is not compatible, may I please be told a common chip (preferably...