LVGL 8.3.7 & ESP-IDF 5.2

[hiruna]

Hi all,

I got IDF v5.2 (master) & LVGL 8.3.7 to compile.

See https://github.com/hiruna/lvgl_esp32_drivers/tree/develop/lvgl_8.3.7_idf_5.2

I only have a SSD1306 128x64 OLED display and a 128x128 ST7735 LCD but focusing on the SSD1306 OLED for now.

Will add a branch for the lv_port_esp32 soon, the main.c needs some tweaking (Only included changes for the SSD1306 hello world, lv_demo_* functions will need changes too):

static lv_disp_buf_t disp_buf; -> static lv_disp_draw_buf_t disp_buf;

lv_disp_buf_init(&disp_buf, buf1, buf2, size_in_px); -> lv_disp_draw_buf_init(&disp_buf, buf1, buf2, size_in_px);

disp_drv.buffer = &disp_buf; -> disp_drv.draw_buf = &disp_buf;

lv_obj_t * label1 = lv_label_create(scr, NULL); -> lv_obj_t * label1 = lv_label_create(scr);

lv_obj_align(label1, NULL, LV_ALIGN_CENTER, 0, 0); -> lv_obj_align(label1, LV_ALIGN_CENTER, 0, 0);

Compilation & flashing succeeds but my OLED display shows garabge (pixel noise), I'm thinking something's wrong with the i2c_manager ?

Feel free to test this branch out and let me know how it is.

[hiruna]

Ok.. so I got my SSD1306 OLED display working again...

See https://github.com/hiruna/lv_port_esp32/tree/develop/lvgl_8.3.7_idf_5.2 for the lv_port_esp32

• removed lv_examples, since it is deprecated, so using LVGL demos directly
• submodules point to my fork of the lvgl_esp32_drivers

Added https://github.com/hiruna/lv_port_esp32/blob/develop/lvgl_8.3.7_idf_5.2/sdkconfig.ssd1306 for reference

[hiruna]

128x128 ST7735 LCD is somewhat working... trying to figure out why the rendering is off the screen bounds 🤔

(what I have : http://www.lcdwiki.com/1.44inch_Arduino_SPI_Module_ST7735S_SKU:MAR1441)

[hiruna]

Fixed it in https://github.com/hiruna/lvgl_esp32_drivers/blob/develop/lvgl_8.3.7_idf_5.2/lvgl_tft/st7735s.h

sdkconfig used: https://github.com/hiruna/lv_port_esp32/blob/develop/lvgl_8.3.7_idf_5.2/sdkconfig.st7735

[hiruna]

Tested lvgl benchmark, 128x128 display is obviously too small but good to see it working
sdkconfig: https://github.com/hiruna/lv_port_esp32/blob/develop/lvgl_8.3.7_idf_5.2/sdkconfig.st7735_benchmark

[hiruna]

Got my hands on a ILI9341 3.2" 320x240 display w/ touch. (http://www.lcdwiki.com/3.2inch_SPI_Module_ILI9341_SKU:MSP3218) Touch panel was not connected/tested in this test.

ESP32 CPU Speed: 240MHz
SPI Speed: 80MHz

Pins:

CLK -> GPIO14
MISO -> GPIO12
MOSI -> GPIO13
LED -> GPIO26
DC -> GPIO27
RST -> GPIO33

sdkconfig used: https://github.com/hiruna/lv_port_esp32/blob/develop/lvgl_8.3.7_idf_5.2/sdkconfig.ili9341

[hiruna]

My ILI9341 3.2" 320x240 touch panel has a HR2046 instead of a XPT2046 but I configured it as a XPT2046 and it works for me.

sdkconfig: https://github.com/hiruna/lv_port_esp32/blob/develop/lvgl_8.3.7_idf_5.2/sdkconfig.ili9341_touch

CONFIG_LV_TOUCH_CONTROLLER_SPI3_HOST=y
CONFIG_LV_TOUCH_X_MIN=200
CONFIG_LV_TOUCH_Y_MIN=200
CONFIG_LV_TOUCH_X_MAX=1907
CONFIG_LV_TOUCH_Y_MAX=1887
CONFIG_LV_TOUCH_SPI_MISO=19
CONFIG_LV_TOUCH_SPI_MOSI=23
CONFIG_LV_TOUCH_SPI_CLK=18
CONFIG_LV_TOUCH_SPI_CS=5
CONFIG_LV_TOUCH_PIN_IRQ=25
CONFIG_LV_TOUCH_INVERT_X=y
CONFIG_LV_TOUCH_DETECT_IRQ=y

[hiruna]

Tested with Waveshare GC9A01 240x240 round display module

sdkconfig: https://github.com/hiruna/lv_port_esp32/blob/develop/lvgl_8.3.7_idf_5.2/sdkconfig.GC9A01

Clock example see: hiruna/lv_port_esp32@e2f588d

[hiruna]

got my self a Freenove esp32s3 (N8R8) and a 1.9inch 170×320 LCD Display Module (ST7789V2) (https://www.waveshare.com/1.9inch-lcd-module.htm)

262K colors are supported by display but LVGL doesnt have the option
took some trial and error to setup the PSRAM for esp32s3
sdkconfig: https://github.com/hiruna/lv_port_esp32/blob/develop/lvgl_8.3.7_idf_5.2/sdkconfig.esp32s3_ST7789

also had to set spi dma chan to auto (got an error saying chan 1 was not supported by the chip, maybe this is not for everyone ?) - hiruna@f22026c

added offsets for the 170x320 display - hiruna@16f9f93

[hiruna]

Ported https://github.com/jakpaul/lvgl_touch_calibration via my fork at https://github.com/hiruna/lvgl_touch_calibration.

PR submitted to @jakpaul with my changes.

Updated https://github.com/hiruna/lv_port_esp32/blob/develop/lvgl_8.3.7_idf_5.2/main/main.c to cater for the touch calibration.

• If the a touch screen is configured, the demo will first begin the touch calibration process (check non volatile storage for existing data, if not calibrate)

Demonstration:

lvgl_touch_calibration_demonstration.mp4

[hiruna]

Tested 320x480px 3.5 inch RPi Display (ILI9486 + XPT2046)

sdkconfig: https://github.com/hiruna/lv_port_esp32/blob/develop/lvgl_8.3.7_idf_5.2/sdkconfig.ILI9486_rpi_disp

[hiruna]

added backward compatibility with esp-idf release/v4.4

[hiruna]

added backward compatibility with esp-idf release/v4.2 (<4.3)

[hiruna]

Tested ESP-IDF versions:

• master
• release/v5.1
• release/v5.0
• release/v4.4
• release/v4.3
• release/v4.2