I am not sure why the editor crossed out some of the lines above. Not on my original. Maybe some escape character snuck in!
I couldn’t find the reference of the screen controller and the touch controller.
Could Seeed provide them with the corresponding data sheets?
Thank you!
Hello,
To solve this problem, you can check if the LVGL library version is between 8.3.4 and 8.3.7. I was able to compile with esp32C3 while using 8.3.7 LGVL library.
Note: LVGL library can be downloaded directly from Arudino IDE.
Thank you! The hardware test compiled! Now I am waiting for the Round Display to arrive. It should be here before week is out. It is being handed over to USPS now.
Can I ask a question regarding reTerminal E10-1 (bridge)? I finally found a M.2 SATA III (could not find any SATA II) and it works but after formatting and mounting, I have no permission to use it. I am hoping chmod will fix it. But the real question is the battery power. Installed two that match the specs (Flat tops) and charged the batteries before installing. Should I be able to power up the reTerminal via the E10-1 batteries? If so, it is not working. The 12V adapter powers both the bridge and the reTerminal but not the batteries?
Reference for the M.2 SSD: TEAMGROUP MS30 512GB with SLC Cache 3D NAND TLC M.2 2280 SATA III 6Gb/s Internal Solid State Drive SSD (Read/Write Speed up to 530/430 MB/s) Compatible with Laptop & PC Desktop TM8PS7512G0C101
I remembered also that I did have some trouble or failure with installing/preparing the E10-1.
Are you able to answer or help with this or pass it to someone else?
reTerminal E10-1 instillation failed - Products & Technology - Seeed Forum (seeedstudio.com)
I tried to install/prepare the E10-1 for Audio and it failed. Probably because of the failed overlays.
Are the overlays supposed to work with “Bullseye” AND “Buster”? The install failed on “Bullseye”
Thank you!
For those looking for the datasheets of the screen and touch controllers, see 240x240 Round IPS TFT LCD Display 1.28" Capactive Touch Circle Screen at Buy Display.
Notable differences are:
- Screen GC9A01A SPI controller: SPI MISO is not implemented on the screen, so reading a pixel is not possible.
- Touch CST816S I²C controller: automatic low power mode is on, direct read gives 5 bytes for number, event, x, 0, y.
Enjoy!
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I wish someone could explain exactly what is going on… it seems with all this arduino stuff
its loading up a bunch of extra libraries and changing a bunch of variables and poof its supposed to work but no one can explain what the heck is going on… it is getting worse by the day
maybe one day ChatGPT will write code for us…
LOL, It already is for Seeed Studio Xiao devices.
HTH
GL 
PJ 
That is the exact reason why I asked for the data-sheets, found them somewhere else and read them.
So I coded a compact driver I could use without loading and installing half a dozen libraries.
WoW, that is a task for sure. Care to show your code ?
Perhaps it will help answer the questions some users have and add to the community.
unless it’s proprietary 
AFAIK, You can get more verbose compiler output to Show what is getting loaded and added to the build so maybe look to turn that on?
HTH
GL
I took three files from GitHub - Bodmer/TFT_eSPI: Arduino and PlatformIO IDE compatible TFT library optimised for the Raspberry Pi Pico (RP2040), STM32, ESP8266 and ESP32 that supports different driver chips and checked them against the example provided by Buy Displays:
-
GC9A01_Defines.h, -
GC9A01_Init.hto be called first; and -
GC9A01_Rotation.hto set the coordinates according to the orientation
To set a point at (x1, y1) with colour
x2 = x1;
y2 = y1;
_writeCommand8(TFT_CASET);
_writeData16(x1);
_writeData16(x2);
_writeCommand8(TFT_PASET);
_writeData16(y1);
_writeData16(y2);
_writeCommand8(TFT_RAMWR);
_writeData16(colour);
That’s it!
reivilo, Slick, 
TNX.
GL
If anyone is still having trouble compiling Arduino sketches for the Round Display, here is one clear method I found to make sure the provided examples work. I believe that I ran into some library conflicts originally on my Windows PC. I am not sure how to delete some libraries from my Windows PC - may have to uninstall and re-install Arduino IDE. However, the simple test was using my RPi400 and created a completely new image and then install Arduino IDE. Then adding the required libraries for the Round Display as stated in the wiki. Make sure you do NOT add the TFT_eSPI library from the IDE library options at anytime but download the library from the WIKI! I was able the have no problems compiling the examples.
i seem to remember a portion of the code that required the TFT_eSPI to be commented out //
that may have to do with it too
ps i think on windows if you go into my documents - arduino folder - libraries you can delete offending instalations… but also sometimes the folder is not the same name as the offending file
also during compile error you can see the offending path
windows no longer allows the setup of “dummy users” to separate login
but maybe on lynix you can set up a new login and get a clean install of arduino without having to wipe the whole OS
regards
The official library doesn’t fit into the limited RAM of the Xiao SAMD. The Xiao ESP32 or RP2040 are required.
Hence the minimalistic implementation I am using with all the Xiao boards.
yes i have noticed this as well
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Anyone got any more tips with this one? I have been back and forward with support on this one getting it working with the Xiao ESP32S3 module but can’t get it to work. Display lights up, but nothing is shown (backlight only)
I’ve been back and forth with support installing different libraries, but nothing works with this display, I’ve got several different circular displays which work fine, but having real trouble with this Xiao display. I’ve even tried Arduino on another computer to rule out old libraries, but cannot get it working.
Very disappointed in my Seeed studio products so far, from reading the documentation before purchasing I was lead to believe this was a well documented and supported piece of hardware. It seems I was wrong.
2 Likes
I’ve got exactly the same issue.
1 Like
I understand the problems people are experiencing and we apologize. Since the LVGL and TFT libraries were not developed by us, there is no way for us to require developers to release versions that work directly with XIAO and Round Display without any modifications. This is true for the vast majority of screen devices, and it is necessary to make changes to the configuration of the libraries.
If you do have trouble with the LVGL and TFT modification steps, I suggest you just use the libraries we’ve already modified instead of downloading them from the Library Manager. If you have better suggestions on how to do this, feel free to submit PRs to our Wiki content as well.
Meanwhile, if you have the need to use SquareLine Studio for LVGL GUI development, you are also welcome to refer to my project program for configuration:
This project is based on the SquareLine 1.2.3 export and lvgl 8.3.4 and tft 1.0.6.