tft_eSPI atmega2560 issues

Other Hardware Displays
1

Need a bit of insight here
I have a ELEGOO MEGA2560 R3 Board and a 4.0inch SPI Module MSP4021 (with touch)
I have working code that will draw on the screen or read/write from the SD card.
I have not been able to get the touch screen to do anything

SPI_display connections
SPI_display connections719×689 57.4 KB

my connections
After a lot of research, it appears the tft_eSPI would be a one library option however there is no combination for the MCU and ST7796S display and the Touch IC XPT2046.
Any thoughts from the GURUs out there?

2

The XPT2046 touch controller would normally be connected to the same SPI pins that are used by the display, i.e 50,51 and 52.

3

they are.. see the connections above the display / SD card /touch screen are all on the SPI bus. only the CS set to low will allow communication on the same BUS to / from the device

4

This part of the pinout you showed;

Screenshot - 01_06_2025 , 09_12_48
Screenshot - 01_06_2025 , 09_12_48638×185 56.4 KB

Appears to have the touch SPI pins connected to pins. 46,47,48 ?

5

Are you thinking that I should be looking at T_DIN (48) and and T_DO(47) as my outputs?

6

If you want to use a XPT2046 touch controller you normally need to connect its SPI bus pins to the SPI bus;

T_CLK to SPI CLK 52
T_DIN to SPI_MOSI 51
T_DO to SPI MISO - 50