This project is used to test the R61529 addition to the TFT-eSPI library. It uses Clion and Platformio, but it should be easy to convert it to another compiler. The excelent TFT-eSPI library does not contain support for the R61529 yet, but a Pull Request has been submited. The code can be found at https://github.com/jkvatne/TFT_eSPI Check out the R61529 branch into the lib/TFT_eSPI folder. This is done with the following commands:

cd lib
$ git clone https://github.com/jkvatne/TFT_eSPI.git
$ cd TFT_eSPI
$ git checkout remotes/origin/R61529

The software has been tested on a custom board. It has a ESP32-S3-WROOM-1-N16R8 module connected to the R61529 based lcd panel as shown below. It works from 3.3V. The board has a 3.3V supply that has to be turned on by the CPU using pin 48. The background led can be controlled by pin 12. It has a USB connection via a CP2102N serial bridge.

The LCD panel comes from Aliexpress), and is the version with LCD and Capacitive Touch. It usesthe FT6206 touch controller. Note that only 8-bit paralell mode is possible - no SPI.

Also note that the documentation for the strapping of the IM0, IM1, IM2 pins are wrong. Strap as shown here for Mode = 4 :MIPI DBI Type B 8 bits. Actually there is an IM3 pin that is wired low internaly.

• IM2 = 3.3V
• IM1 = 0V
• IM0 = 0V

The following connections are used.

• TFT_CS=38
• TFT_DC=47
• TFT_RST=37
• TFT_WR=11
• TFT_RD=10
• TFT_D0=1
• TFT_D1=2
• TFT_D2=3
• TFT_D3=4
• TFT_D4=5
• TFT_D5=6
• TFT_D6=7
• TFT_D7=8

Note that everything is defined in the platformio.ini file, and the UserSetup.h file is ignored (by setting the USER_SETUP_LOADED symbol in platformio.ini). In this way there is no need to modify files in the lib/TFT_eSPI folder.

The program will display some text using two different fonts, and draw a small red rectangle where it detects a touch. Both portrait mode and landscape mode can be used by changing the ORIENTATION constant in platformio.ini.