Board Support Package (esp-bsp component) modified for esp32-cam using ESP-IDF 5.3, 2,8" ili9341 LCD display and LVGL 9.x

Esp32-cam connected to 2.8" ili9341 LCD display using LVGL for video stream. This project requires the esp-idf sdk 5.3.1.

Display Pins

Pin Number on ILI9341 Display	Pin Number on ESP32-cam
3.3V	3.3V
GND	GND
CS	12
RESET*	2*
DC	13
MOSI	15
CLK	14
LED	3.3V
MISO	NC

• you can connect LCD RESET PIN directly to the EN/RESET PIN on esp32 MCU (see picture bellow).

RESET PIN and GPIO33 access

ESP32 reset pin can be connected directly to the display's reset pin and so GPIO 2 can be used for other purposes. The same goes for GPIO 33, for example for connecting a button or the touch screen controller XPT2046.

LVGL configuration settings

You can choose to build with the default LVGL configuration settings from:

idf.py menuconfig

Menu → Component config → LVGL configuration → Memory Settings:

and:

Malloc functions source (Standard C functions malloc/realloc/free) --->  

String functions source (Standard C functions memcpy/memset/strlen/strcpy) --->   

Sprintf functions source (Standard C functions vsnprintf) --->

or change to custom

LVGL's built in implementation settings (included in sdkconfig.defaults ):

(64) Size of the memory used by lv_malloc() in kilobytes (>= 2kB)

(0) Size of the memory expand for lv_malloc() in kilobytes

(0x0) Address for the memory pool instead of allocating it as a normal array

esp32-cam.mp4

Example of connecting a ILI9341 display and a XPT2046 touch panel to the same SPI bus

Pin Number on ILI9341 Display	Pin Number on ESP32-cam
3.3V	3.3V
GND	GND
CS	12
RESET*	esp32 RESET PIN
DC	13
MOSI (T_DIN)	15
SCK (T_CLK)	14
LED	3.3V
MISO (T_DO)	33
T_CS	2
T_IRQ	NC