Connect the resistive touchscreen to CS, RS, D0, D1

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• MCU or Board name: ESP32-S3-DevKit N16R8
• Panel Driver IC: ILI9486
• Bus type: Parallel8
• LovyanGFX version: 1.1.9
• FrameWork version: ArduinoESP32 v2.0.14
• Build Environment: ArduinoIDE 2.2.1
• Operating System: Windows 11

Hello! My display: http://www.lcdwiki.com/3.5inch_Arduino_Display-UNO This is the touchscreen connection diagram: https://iarduino.ru/img/upload/dbc406579b2f25fb1b6a56d99ea6a1f6.jpg The contacts CS, RS, D0, D1 are connected to the resistive layer of the touchscreen.

1) I switch the D0 contact for voltage measurement gpio_set_direction(GPIO_NUM_2, GPIO_MODE_INPUT); 2) I measure the analog signal pin 2 3) Set pin 2 as output gpio_set_direction(GPIO_NUM_2, GPIO_MODE_OUTPUT); 4) The LovyanGFX library does not work.

For example, the TFT_eSPI library continues to work after gpio_set_direction(GPIO_NUM_2, GPIO_MODE_OUTPUT); How do I restore the operation of LovyanGFX after changing the settings for pin D0?

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For instance, if the display contacts are connected to the ESP32 S3 microcontroller as follows: D0 – 2 GPIO D1 – 1 GPIO CS – 5 GPIO RS – 6 GPIO Then, we use these pins to operate the touchscreen.

To restore the operation of the LovyanGFX library, you can do the following:

gpio_set_direction(GPIO_NUM_5, GPIO_MODE_OUTPUT); // sets as output
gpio_matrix_out(6, LCD_DC_IDX, 0, 0); // 6 GPIO - RS
gpio_matrix_out(2, LCD_DATA_OUT0_IDX + 0, 0, 0); // 2 GPIO - D0
gpio_matrix_out(1, LCD_DATA_OUT0_IDX + 1, 0, 0); // 1 GPIO – D1

These functions were taken from the LovyanGFX library initialization code.

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