Description
After installing LVGL and TFT_eSPI libraries into a working Arduino IDE (v2) using Library Manager I followed the instructions here to configure TFT and LVGL. My setup is “User_Setups/Setup46_GC9A01_ESP32.h”.
I then opened the example sketch: LVGL_Arduino.ino and updated screenWidth, screenHeight (240x240).
PROBLEM: When I compile the script it fails with the following error:
/Users/lpslot/Documents/Arduino/libraries/lvgl/src/core/lv_obj_style 2.c:10:10: fatal error:
…/display/lv_display.h: No such file or directory
#include “…/display/lv_display.h”
^~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
There is in fact no “display” directory.
The directory structure (macOS) is as described:
~
|-Documents
|-arduino
|-libraries
|-lvgl
|-TFT_eSPI
|-lv_conf.h
UPDATE: Digging a little deeper, I find that the required “display” directory (/lvgl/src/display/) is not present in any of the release builds, but it is in the GitHub ‘master’ repository.
What MCU/Processor/Board and compiler are you using?
ESP32-C3-MINI-1 on combined MCU/TouchDisplay board: ESP32-2424S012
Arduino IDE 2 uses: ESP32C3 Dev Module
What do you want to achieve?
I have created a UI in SquareLine Studio, and would like to install it. But installing any example code for this board would be a start.
What have you tried so far?
I connected my board via USB and ran the test ESP32 Hello World sketch successfully.
I replaced the Arduino Library Manager installed version (8.3) with the master branch from GitHub. Because it contains the “display” directory, the compile gets farther, but ultimately fails with:
...
Compiling sketch...
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-I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/include/esp32-camera/driver/include -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/include/esp32-camera/conversions/include -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/include/espressif__esp-dsp/modules/dotprod/include -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/include/espressif__esp-dsp/modules/support/include -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/include/espressif__esp-dsp/modules/support/mem/include -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/include/espressif__esp-dsp/modules/windows/include -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/include/espressif__esp-dsp/modules/windows/hann/include 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-I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/include/espressif__esp-dsp/modules/fir/include -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/include/espressif__esp-dsp/modules/math/include -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/include/espressif__esp-dsp/modules/math/add/include -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/include/espressif__esp-dsp/modules/math/sub/include -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/include/espressif__esp-dsp/modules/math/mul/include -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/include/espressif__esp-dsp/modules/math/addc/include -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/include/espressif__esp-dsp/modules/math/mulc/include -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/include/espressif__esp-dsp/modules/math/sqrt/include -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/include/espressif__esp-dsp/modules/matrix/include -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/include/espressif__esp-dsp/modules/fft/include -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/include/espressif__esp-dsp/modules/dct/include -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/include/espressif__esp-dsp/modules/conv/include -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/include/espressif__esp-dsp/modules/common/include -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/include/espressif__esp-dsp/modules/kalman/ekf/include -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/include/espressif__esp-dsp/modules/kalman/ekf_imu13states/include -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/include/fb_gfx/include -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/tools/sdk/esp32c3/qio_qspi/include -march=rv32imc -ffunction-sections -fdata-sections -Wno-error=unused-function -Wno-error=unused-variable -Wno-error=deprecated-declarations -Wno-unused-parameter -Wno-sign-compare -ggdb -Wno-error=format= -nostartfiles -Wno-format -freorder-blocks -Wwrite-strings -fstack-protector -fstrict-volatile-bitfields -Wno-error=unused-but-set-variable -fno-jump-tables -fno-tree-switch-conversion -std=gnu++11 -fexceptions -fno-rtti -MMD -c -w -Os -DF_CPU=160000000L -DARDUINO=10607 -DARDUINO_ESP32C3_DEV -DARDUINO_ARCH_ESP32 "-DARDUINO_BOARD=\"ESP32C3_DEV\"" "-DARDUINO_VARIANT=\"esp32c3\"" -DARDUINO_PARTITION_huge_app -DESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_USB_MODE=1 -DARDUINO_USB_CDC_ON_BOOT=1 @/private/var/folders/h8/2kjq8f9x6pv7hszzxgvt1jgh0000gp/T/arduino/sketches/52E1D7E1494C6EA2725FABC8E0C08AEF/build_opt.h @/private/var/folders/h8/2kjq8f9x6pv7hszzxgvt1jgh0000gp/T/arduino/sketches/52E1D7E1494C6EA2725FABC8E0C08AEF/file_opts -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/cores/esp32 -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/variants/esp32c3 -I/Users/lpslot/Documents/Arduino/libraries/lvgl/src -I/Users/lpslot/Documents/Arduino/libraries/TFT_eSPI -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/libraries/SPI/src -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/libraries/FS/src -I/Users/lpslot/Library/Arduino15/packages/esp32/hardware/esp32/2.0.14/libraries/SPIFFS/src /private/var/folders/h8/2kjq8f9x6pv7hszzxgvt1jgh0000gp/T/arduino/sketches/52E1D7E1494C6EA2725FABC8E0C08AEF/sketch/LVGL_Arduino.ino.cpp -o /private/var/folders/h8/2kjq8f9x6pv7hszzxgvt1jgh0000gp/T/arduino/sketches/52E1D7E1494C6EA2725FABC8E0C08AEF/sketch/LVGL_Arduino.ino.cpp.o
/Users/lpslot/Documents/Arduino/LVGL_Arduino/LVGL_Arduino.ino:19:8: error: 'lv_disp_draw_buf_t' does not name a type; did you mean 'lv_disp_render_t'?
static lv_disp_draw_buf_t draw_buf;
^~~~~~~~~~~~~~~~~~
lv_disp_render_t
… and other errors.
Code to reproduce
/*Using LVGL with Arduino requires some extra steps:
*Be sure to read the docs here: https://docs.lvgl.io/master/get-started/platforms/arduino.html */
#include <lvgl.h>
#include <TFT_eSPI.h>
/*To use the built-in examples and demos of LVGL uncomment the includes below respectively.
*You also need to copy `lvgl/examples` to `lvgl/src/examples`. Similarly for the demos `lvgl/demos` to `lvgl/src/demos`.
Note that the `lv_examples` library is for LVGL v7 and you shouldn't install it for this version (since LVGL v8)
as the examples and demos are now part of the main LVGL library. */
/*Change to your screen resolution*/
static const uint16_t screenWidth = 240;
static const uint16_t screenHeight = 240;
static lv_disp_draw_buf_t draw_buf;
static lv_color_t buf[ screenWidth * screenHeight / 10 ];
TFT_eSPI tft = TFT_eSPI(screenWidth, screenHeight); /* TFT instance */
#if LV_USE_LOG != 0
/* Serial debugging */
void my_print(const char * buf)
{
Serial.printf(buf);
Serial.flush();
}
#endif
/* Display flushing */
void my_disp_flush( lv_disp_drv_t *disp_drv, const lv_area_t *area, lv_color_t *color_p )
{
uint32_t w = ( area->x2 - area->x1 + 1 );
uint32_t h = ( area->y2 - area->y1 + 1 );
tft.startWrite();
tft.setAddrWindow( area->x1, area->y1, w, h );
tft.pushColors( ( uint16_t * )&color_p->full, w * h, true );
tft.endWrite();
lv_disp_flush_ready( disp_drv );
}
/*Read the touchpad*/
void my_touchpad_read( lv_indev_drv_t * indev_drv, lv_indev_data_t * data )
{
uint16_t touchX, touchY;
bool touched = tft.getTouch( &touchX, &touchY, 600 );
if( !touched )
{
data->state = LV_INDEV_STATE_REL;
}
else
{
data->state = LV_INDEV_STATE_PR;
/*Set the coordinates*/
data->point.x = touchX;
data->point.y = touchY;
Serial.print( "Data x " );
Serial.println( touchX );
Serial.print( "Data y " );
Serial.println( touchY );
}
}
void setup()
{
Serial.begin( 115200 ); /* prepare for possible serial debug */
String LVGL_Arduino = "Hello Arduino! ";
LVGL_Arduino += String('V') + lv_version_major() + "." + lv_version_minor() + "." + lv_version_patch();
Serial.println( LVGL_Arduino );
Serial.println( "I am LVGL_Arduino" );
lv_init();
#if LV_USE_LOG != 0
lv_log_register_print_cb( my_print ); /* register print function for debugging */
#endif
tft.begin(); /* TFT init */
tft.setRotation( 3 ); /* Landscape orientation, flipped */
/*Set the touchscreen calibration data,
the actual data for your display can be acquired using
the Generic -> Touch_calibrate example from the TFT_eSPI library*/
uint16_t calData[5] = { 275, 3620, 264, 3532, 1 };
tft.setTouch( calData );
lv_disp_draw_buf_init( &draw_buf, buf, NULL, screenWidth * screenHeight / 10 );
/*Initialize the display*/
static lv_disp_drv_t disp_drv;
lv_disp_drv_init( &disp_drv );
/*Change the following line to your display resolution*/
disp_drv.hor_res = screenWidth;
disp_drv.ver_res = screenHeight;
disp_drv.flush_cb = my_disp_flush;
disp_drv.draw_buf = &draw_buf;
lv_disp_drv_register( &disp_drv );
/*Initialize the (dummy) input device driver*/
static lv_indev_drv_t indev_drv;
lv_indev_drv_init( &indev_drv );
indev_drv.type = LV_INDEV_TYPE_POINTER;
indev_drv.read_cb = my_touchpad_read;
lv_indev_drv_register( &indev_drv );
/* Create simple label */
lv_obj_t *label = lv_label_create( lv_scr_act() );
lv_label_set_text( label, "Hello Ardino and LVGL!");
lv_obj_align( label, LV_ALIGN_CENTER, 0, 0 );
/* Try an example. See all the examples
* online: https://docs.lvgl.io/master/examples.html
* source codes: https://github.com/lvgl/lvgl/tree/e7f88efa5853128bf871dde335c0ca8da9eb7731/examples */
//lv_example_btn_1();
/*Or try out a demo. Don't forget to enable the demos in lv_conf.h. E.g. LV_USE_DEMOS_WIDGETS*/
//lv_demo_widgets();
// lv_demo_benchmark();
// lv_demo_keypad_encoder();
// lv_demo_music();
// lv_demo_printer();
// lv_demo_stress();
Serial.println( "Setup done" );
}
void loop()
{
lv_timer_handler(); /* let the GUI do its work */
delay( 5 );
}
Screenshot and/or video
Thanks in advance,
–Louis