I am trying to use esp wroom32 and ILI9341 to run LVGL. I am using arduino framework on platformIO, TFT_eSPI library as the driver.
The sample program runs, but the display color is strange. I tried to change the screen but got the same result. I suspect it is a code problem, but I don’t know where the problem lies.
Here is the configuration file:
For the convenience of reading, some of the configurations with define as 0 and commented out have been deleted here
lvgl/lv_conf.h
/**
* @file lv_conf.h
* Configuration file for v7.10.1
*/
#if 1 /*Set it to "1" to enable content*/
#ifndef LV_CONF_H
#define LV_CONF_H
#include <stdint.h>
/*====================
Graphical settings
*====================*/
#define LV_HOR_RES_MAX (240)
#define LV_VER_RES_MAX (320)
#define LV_COLOR_DEPTH 16
#define LV_COLOR_16_SWAP 1
#define LV_COLOR_SCREEN_TRANSP 0
#define LV_COLOR_TRANSP LV_COLOR_LIME /*LV_COLOR_LIME: pure green*/
#define LV_ANTIALIAS 1
#define LV_DISP_DEF_REFR_PERIOD 30 /*[ms]*/
#define LV_DPI 130 /*[px]*/
#define LV_DISP_SMALL_LIMIT 30
#define LV_DISP_MEDIUM_LIMIT 50
#define LV_DISP_LARGE_LIMIT 70
typedef int16_t lv_coord_t;
#define LV_DISP_ROT_MAX_BUF (10U * 1024U)
/*=========================
Memory manager settings
*=========================*/
#define LV_MEM_CUSTOM 0
#if LV_MEM_CUSTOM == 0
# define LV_MEM_SIZE (32U * 1024U)
# define LV_MEM_ATTR
# define LV_MEM_ADR 0
# define LV_MEM_AUTO_DEFRAG 1
#else /*LV_MEM_CUSTOM*/
# define LV_MEM_CUSTOM_INCLUDE <stdlib.h> /*Header for the dynamic memory function*/
# define LV_MEM_CUSTOM_ALLOC malloc /*Wrapper to malloc*/
# define LV_MEM_CUSTOM_FREE free /*Wrapper to free*/
#endif /*LV_MEM_CUSTOM*/
#define LV_MEMCPY_MEMSET_STD 0
#define LV_ENABLE_GC 0
#if LV_ENABLE_GC != 0
# define LV_GC_INCLUDE "gc.h" /*Include Garbage Collector related things*/
# define LV_MEM_CUSTOM_REALLOC your_realloc /*Wrapper to realloc*/
# define LV_MEM_CUSTOM_GET_SIZE your_mem_get_size /*Wrapper to lv_mem_get_size*/
#endif /* LV_ENABLE_GC */
/*=======================
Input device settings
*=======================*/
#define LV_INDEV_DEF_READ_PERIOD 30
#define LV_INDEV_DEF_DRAG_LIMIT 10
#define LV_INDEV_DEF_DRAG_THROW 10
#define LV_INDEV_DEF_LONG_PRESS_TIME 400
#define LV_INDEV_DEF_LONG_PRESS_REP_TIME 100
#define LV_INDEV_DEF_GESTURE_LIMIT 50
#define LV_INDEV_DEF_GESTURE_MIN_VELOCITY 3
/*==================
* Feature usage
*==================*/
#define LV_USE_ANIMATION 1
#if LV_USE_ANIMATION
typedef void * lv_anim_user_data_t;
#endif
#define LV_USE_SHADOW 1
#if LV_USE_SHADOW
#define LV_SHADOW_CACHE_SIZE 64
#endif
#define LV_USE_OUTLINE 1
#define LV_USE_PATTERN 1
#define LV_USE_VALUE_STR 1
#define LV_USE_BLEND_MODES 1
#define LV_USE_OPA_SCALE 1
#define LV_USE_IMG_TRANSFORM 1
#define LV_USE_GROUP 1
#if LV_USE_GROUP
typedef void * lv_group_user_data_t;
#endif /*LV_USE_GROUP*/
#define LV_USE_GPU 0 /*Only enables `gpu_fill_cb` and `gpu_blend_cb` in the disp. drv- */
#define LV_USE_GPU_STM32_DMA2D 0
#define LV_GPU_DMA2D_CMSIS_INCLUDE
#define LV_USE_GPU_NXP_PXP 0
#define LV_USE_GPU_NXP_PXP_AUTO_INIT 0
#define LV_USE_GPU_NXP_VG_LITE 0
#define LV_USE_FILESYSTEM 1
#if LV_USE_FILESYSTEM
typedef void * lv_fs_drv_user_data_t;
#endif
#define LV_USE_USER_DATA 1
#define LV_USE_PERF_MONITOR 1
#define LV_USE_API_EXTENSION_V6 1
#define LV_USE_API_EXTENSION_V7 1
/*========================
* Image decoder and cache
*========================*/
#define LV_IMG_CF_INDEXED 1
#define LV_IMG_CF_ALPHA 1
#define LV_IMG_CACHE_DEF_SIZE 1
typedef void * lv_img_decoder_user_data_t;
/*=====================
* Compiler settings
*====================*/
#define LV_BIG_ENDIAN_SYSTEM 0
#define LV_ATTRIBUTE_TICK_INC
#define LV_ATTRIBUTE_TASK_HANDLER
#define LV_ATTRIBUTE_FLUSH_READY
#define LV_ATTRIBUTE_MEM_ALIGN_SIZE
#define LV_ATTRIBUTE_MEM_ALIGN
#define LV_ATTRIBUTE_LARGE_CONST
#define LV_ATTRIBUTE_FAST_MEM
#define LV_EXPORT_CONST_INT(int_value) struct _silence_gcc_warning
#define LV_ATTRIBUTE_DMA
/*===================
* HAL settings
*==================*/
#define LV_TICK_CUSTOM 1
#if LV_TICK_CUSTOM == 1
#define LV_TICK_CUSTOM_INCLUDE "Arduino.h" /*Header for the system time function*/
#define LV_TICK_CUSTOM_SYS_TIME_EXPR (millis()) /*Expression evaluating to current system time in ms*/
#endif /*LV_TICK_CUSTOM*/
typedef void * lv_disp_drv_user_data_t; /*Type of user data in the display driver*/
typedef void * lv_indev_drv_user_data_t; /*Type of user data in the input device driver*/
/*================
* Log settings
*===============*/
#define LV_USE_LOG 0
#if LV_USE_LOG
# define LV_LOG_LEVEL LV_LOG_LEVEL_WARN
# define LV_LOG_PRINTF 0
#endif /*LV_USE_LOG*/
/*=================
* Debug settings
*================*/
#define LV_USE_DEBUG 0
#if LV_USE_DEBUG
#define LV_USE_ASSERT_NULL 1
#define LV_USE_ASSERT_MEM 1
#define LV_USE_ASSERT_MEM_INTEGRITY 0
#define LV_USE_ASSERT_STR 0
#define LV_USE_ASSERT_OBJ 0
#define LV_USE_ASSERT_STYLE 0
#endif /*LV_USE_DEBUG*/
/*==================
* FONT USAGE
*===================*/
#define LV_FONT_MONTSERRAT_8 0
#define LV_FONT_MONTSERRAT_10 1
#define LV_FONT_MONTSERRAT_12 1
#define LV_FONT_MONTSERRAT_14 1
#define LV_FONT_MONTSERRAT_16 0
#define LV_FONT_MONTSERRAT_18 0
#define LV_FONT_MONTSERRAT_20 0
#define LV_FONT_MONTSERRAT_22 0
#define LV_FONT_MONTSERRAT_24 0
#define LV_FONT_MONTSERRAT_26 0
#define LV_FONT_MONTSERRAT_28 0
#define LV_FONT_MONTSERRAT_30 1
#define LV_FONT_MONTSERRAT_32 0
#define LV_FONT_MONTSERRAT_34 0
#define LV_FONT_MONTSERRAT_36 0
#define LV_FONT_MONTSERRAT_38 0
#define LV_FONT_MONTSERRAT_40 0
#define LV_FONT_MONTSERRAT_42 0
#define LV_FONT_MONTSERRAT_44 0
#define LV_FONT_MONTSERRAT_46 0
#define LV_FONT_MONTSERRAT_48 0
/* Demonstrate special features */
#define LV_FONT_MONTSERRAT_12_SUBPX 0
#define LV_FONT_MONTSERRAT_28_COMPRESSED 0 /*bpp = 3*/
#define LV_FONT_DEJAVU_16_PERSIAN_HEBREW 0 /*Hebrew, Arabic, PErisan letters and all their forms*/
#define LV_FONT_SIMSUN_16_CJK 0 /*1000 most common CJK radicals*/
#define LV_FONT_UNSCII_8 0
#define LV_FONT_UNSCII_16 0
/* Optionally declare your custom fonts here.
* You can use these fonts as default font too
* and they will be available globally. E.g.
* #define LV_FONT_CUSTOM_DECLARE LV_FONT_DECLARE(my_font_1) \
* LV_FONT_DECLARE(my_font_2)
*/
#define LV_FONT_CUSTOM_DECLARE
#define LV_FONT_FMT_TXT_LARGE 0
#define LV_USE_FONT_COMPRESSED 1
#define LV_USE_FONT_SUBPX 1
#if LV_USE_FONT_SUBPX
#define LV_FONT_SUBPX_BGR 0
#endif
typedef void * lv_font_user_data_t;
/*================
* THEME USAGE
*================*/
#define LV_USE_THEME_EMPTY 1
#define LV_USE_THEME_TEMPLATE 1
/* A fast and impressive theme.
* Flags:
* LV_THEME_MATERIAL_FLAG_LIGHT: light theme
* LV_THEME_MATERIAL_FLAG_DARK: dark theme
* LV_THEME_MATERIAL_FLAG_NO_TRANSITION: disable transitions (state change animations)
* LV_THEME_MATERIAL_FLAG_NO_FOCUS: disable indication of focused state)
* */
#define LV_USE_THEME_MATERIAL 2
#define LV_USE_THEME_MONO 0
#define LV_THEME_DEFAULT_INCLUDE <stdint.h> /*Include a header for the init. function*/
#define LV_THEME_DEFAULT_INIT lv_theme_material_init
#define LV_THEME_DEFAULT_COLOR_PRIMARY lv_color_hex(0x01a2b1)
#define LV_THEME_DEFAULT_COLOR_SECONDARY lv_color_hex(0x44d1b6)
#define LV_THEME_DEFAULT_FLAG LV_THEME_MATERIAL_FLAG_LIGHT
#define LV_THEME_DEFAULT_FONT_SMALL &lv_font_montserrat_10
#define LV_THEME_DEFAULT_FONT_NORMAL &lv_font_montserrat_10
#define LV_THEME_DEFAULT_FONT_SUBTITLE &lv_font_montserrat_10
#define LV_THEME_DEFAULT_FONT_TITLE &lv_font_montserrat_10
/*=================
* Text settings
*=================*/
#define LV_TXT_ENC LV_TXT_ENC_UTF8
#define LV_TXT_BREAK_CHARS " ,.;:-_"
#define LV_TXT_LINE_BREAK_LONG_LEN 0
#define LV_TXT_LINE_BREAK_LONG_PRE_MIN_LEN 3
#define LV_TXT_LINE_BREAK_LONG_POST_MIN_LEN 3
#define LV_TXT_COLOR_CMD "#"
#define LV_USE_BIDI 0
#if LV_USE_BIDI
#define LV_BIDI_BASE_DIR_DEF LV_BIDI_DIR_AUTO
#endif
#define LV_USE_ARABIC_PERSIAN_CHARS 0
/*Change the built in (v)snprintf functions*/
#define LV_SPRINTF_CUSTOM 0
#if LV_SPRINTF_CUSTOM
# define LV_SPRINTF_INCLUDE <stdio.h>
# define lv_snprintf snprintf
# define lv_vsnprintf vsnprintf
#else /*!LV_SPRINTF_CUSTOM*/
# define LV_SPRINTF_DISABLE_FLOAT 1
#endif /*LV_SPRINTF_CUSTOM*/
/*===================
* LV_OBJ SETTINGS
*==================*/
#if LV_USE_USER_DATA
typedef void * lv_obj_user_data_t;
#define LV_USE_USER_DATA_FREE 0
#if LV_USE_USER_DATA_FREE
# define LV_USER_DATA_FREE_INCLUDE "something.h" /*Header for user data free function*/
# define LV_USER_DATA_FREE (user_data_free) /*Invoking for user data free function*/
#endif
#endif
#define LV_USE_OBJ_REALIGN 1
#define LV_USE_EXT_CLICK_AREA LV_EXT_CLICK_AREA_TINY
/*==================
* LV OBJ X USAGE
*================*/
#define LV_USE_ARC 1
#define LV_USE_BAR 1
#define LV_USE_BTN 1
#define LV_USE_BTNMATRIX 1
#define LV_USE_CALENDAR 1
#if LV_USE_CALENDAR
# define LV_CALENDAR_WEEK_STARTS_MONDAY 0
#endif
#define LV_USE_CANVAS 1
#define LV_USE_CHECKBOX 1
#define LV_USE_CHART 1
#if LV_USE_CHART
# define LV_CHART_AXIS_TICK_LABEL_MAX_LEN 256
#endif
#define LV_USE_CONT 1
#define LV_USE_CPICKER 1
#define LV_USE_DROPDOWN 1
#if LV_USE_DROPDOWN != 0
# define LV_DROPDOWN_DEF_ANIM_TIME 200
#endif
#define LV_USE_GAUGE 1
#define LV_USE_IMG 1
#define LV_USE_IMGBTN 1
#if LV_USE_IMGBTN
# define LV_IMGBTN_TILED 0
#endif
#define LV_USE_KEYBOARD 1
#define LV_USE_LABEL 1
#if LV_USE_LABEL != 0
# define LV_LABEL_DEF_SCROLL_SPEED 25
# define LV_LABEL_WAIT_CHAR_COUNT 3
# define LV_LABEL_TEXT_SEL 0
# define LV_LABEL_LONG_TXT_HINT 0
#endif
#define LV_USE_LED 1
#if LV_USE_LED
# define LV_LED_BRIGHT_MIN 120 /*Minimal brightness*/
# define LV_LED_BRIGHT_MAX 255 /*Maximal brightness*/
#endif
#define LV_USE_LINE 1
#define LV_USE_LIST 1
#if LV_USE_LIST != 0
# define LV_LIST_DEF_ANIM_TIME 100
#endif
#define LV_USE_LINEMETER 1
#if LV_USE_LINEMETER
# define LV_LINEMETER_PRECISE 1
#endif
#define LV_USE_OBJMASK 1
#define LV_USE_MSGBOX 1
#define LV_USE_PAGE 1
#if LV_USE_PAGE != 0
# define LV_PAGE_DEF_ANIM_TIME 400
#endif
#define LV_USE_SPINNER 1
#if LV_USE_SPINNER != 0
# define LV_SPINNER_DEF_ARC_LENGTH 60 /*[deg]*/
# define LV_SPINNER_DEF_SPIN_TIME 1000 /*[ms]*/
# define LV_SPINNER_DEF_ANIM LV_SPINNER_TYPE_SPINNING_ARC
#endif
#define LV_USE_ROLLER 1
#if LV_USE_ROLLER != 0
# define LV_ROLLER_DEF_ANIM_TIME 200
# define LV_ROLLER_INF_PAGES 7
#endif
#define LV_USE_SLIDER 1
#define LV_USE_SPINBOX 1
#define LV_USE_SWITCH 1
#define LV_USE_TEXTAREA 1
#if LV_USE_TEXTAREA != 0
# define LV_TEXTAREA_DEF_CURSOR_BLINK_TIME 400 /*ms*/
# define LV_TEXTAREA_DEF_PWD_SHOW_TIME 1500 /*ms*/
#endif
#define LV_USE_TABLE 1
#if LV_USE_TABLE
# define LV_TABLE_COL_MAX 12
# define LV_TABLE_CELL_STYLE_CNT 4
#endif
#define LV_USE_TABVIEW 1
# if LV_USE_TABVIEW != 0
# define LV_TABVIEW_DEF_ANIM_TIME 300
#endif
#define LV_USE_TILEVIEW 1
#if LV_USE_TILEVIEW
# define LV_TILEVIEW_DEF_ANIM_TIME 300
#endif
#define LV_USE_WIN 1
/*==================
* Non-user section
*==================*/
#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS) /* Disable warnings for Visual Studio*/
# define _CRT_SECURE_NO_WARNINGS
#endif
/*--END OF LV_CONF_H--*/
#endif /*LV_CONF_H*/
#endif /*End of "Content enable"*/
lv_drivers/lv_drv_conf.h
/**
* @file lv_drv_conf.h
* Configuration file for v7.11.0
*/
/*
* COPY THIS FILE AS lv_drv_conf.h
*/
#if 1 /*Set it to "1" to enable the content*/
#ifndef LV_DRV_CONF_H
#define LV_DRV_CONF_H
#include "lv_conf.h"
/*********************
* DELAY INTERFACE
*********************/
#define LV_DRV_DELAY_INCLUDE <stdint.h> /*Dummy include by default*/
#define LV_DRV_DELAY_US(us) /*delay_us(us)*/ /*Delay the given number of microseconds*/
#define LV_DRV_DELAY_MS(ms) /*delay_ms(ms)*/ /*Delay the given number of milliseconds*/
/*********************
* DISPLAY INTERFACE
*********************/
/*------------
* Common
*------------*/
#define LV_DRV_DISP_INCLUDE <stdint.h> /*Dummy include by default*/
#define LV_DRV_DISP_CMD_DATA(val) /*pin_x_set(val)*/ /*Set the command/data pin to 'val'*/
#define LV_DRV_DISP_RST(val) /*pin_x_set(val)*/ /*Set the reset pin to 'val'*/
/*---------
* SPI
*---------*/
#define LV_DRV_DISP_SPI_CS(val) /*spi_cs_set(val)*/ /*Set the SPI's Chip select to 'val'*/
#define LV_DRV_DISP_SPI_WR_BYTE(data) /*spi_wr(data)*/ /*Write a byte the SPI bus*/
#define LV_DRV_DISP_SPI_WR_ARRAY(adr, n) /*spi_wr_mem(adr, n)*/ /*Write 'n' bytes to SPI bus from 'adr'*/
/*------------------
* Parallel port
*-----------------*/
#define LV_DRV_DISP_PAR_CS(val) /*par_cs_set(val)*/ /*Set the Parallel port's Chip select to 'val'*/
#define LV_DRV_DISP_PAR_SLOW /*par_slow()*/ /*Set low speed on the parallel port*/
#define LV_DRV_DISP_PAR_FAST /*par_fast()*/ /*Set high speed on the parallel port*/
#define LV_DRV_DISP_PAR_WR_WORD(data) /*par_wr(data)*/ /*Write a word to the parallel port*/
#define LV_DRV_DISP_PAR_WR_ARRAY(adr, n) /*par_wr_mem(adr,n)*/ /*Write 'n' bytes to Parallel ports from 'adr'*/
/***************************
* INPUT DEVICE INTERFACE
***************************/
/*----------
* Common
*----------*/
#define LV_DRV_INDEV_INCLUDE <stdint.h> /*Dummy include by default*/
#define LV_DRV_INDEV_RST(val) /*pin_x_set(val)*/ /*Set the reset pin to 'val'*/
#define LV_DRV_INDEV_IRQ_READ 0 /*pn_x_read()*/ /*Read the IRQ pin*/
/*---------
* SPI
*---------*/
#define LV_DRV_INDEV_SPI_CS(val) /*spi_cs_set(val)*/ /*Set the SPI's Chip select to 'val'*/
#define LV_DRV_INDEV_SPI_XCHG_BYTE(data) 0 /*spi_xchg(val)*/ /*Write 'val' to SPI and give the read value*/
/*---------
* I2C
*---------*/
#define LV_DRV_INDEV_I2C_START /*i2c_start()*/ /*Make an I2C start*/
#define LV_DRV_INDEV_I2C_STOP /*i2c_stop()*/ /*Make an I2C stop*/
#define LV_DRV_INDEV_I2C_RESTART /*i2c_restart()*/ /*Make an I2C restart*/
#define LV_DRV_INDEV_I2C_WR(data) /*i2c_wr(data)*/ /*Write a byte to the I1C bus*/
#define LV_DRV_INDEV_I2C_READ(last_read) 0 /*i2c_rd()*/ /*Read a byte from the I2C bud*/
/*********************
* DISPLAY DRIVERS
*********************/
/*-------------------------------------------------
* ILI9341 240X320 TFT LCD
*------------------------------------------------*/
#ifndef USE_ILI9341
# define USE_ILI9341 1
#endif
#if USE_ILI9341
# define ILI9341_HOR_RES LV_HOR_RES
# define ILI9341_VER_RES LV_VER_RES
# define ILI9341_GAMMA 1
# define ILI9341_TEARING 0
#endif /*USE_ILI9341*/
/*********************
* INPUT DEVICES
*********************/
/*--------------
* XPT2046
*--------------*/
#ifndef USE_XPT2046
# define USE_XPT2046 0
#endif
#if USE_XPT2046
# define XPT2046_HOR_RES 240
# define XPT2046_VER_RES 320
# define XPT2046_X_MIN 200
# define XPT2046_Y_MIN 200
# define XPT2046_X_MAX 3800
# define XPT2046_Y_MAX 3800
# define XPT2046_AVG 4
# define XPT2046_X_INV 0
# define XPT2046_Y_INV 0
# define XPT2046_XY_SWAP 0
#endif
#endif /*LV_DRV_CONF_H*/
#endif /*End of "Content enable"*/
TFT_eSPI/User_Setup.h
// ##################################################################################
//
// Section 1. Call up the right driver file and any options for it
//
// ##################################################################################
// Tell the library to use 8 bit parallel mode (otherwise SPI is assumed)
//#define TFT_PARALLEL_8_BIT
// Only define one driver, the other ones must be commented out
#define ILI9341_DRIVER // Generic driver for common displays
// For ST7735, ST7789 and ILI9341 ONLY, define the colour order IF the blue and red are swapped on your display
// Try ONE option at a time to find the correct colour order for your display
//#define TFT_RGB_ORDER TFT_RGB // Colour order Red-Green-Blue
//#define TFT_RGB_ORDER TFT_BGR // Colour order Blue-Green-Red
// If colours are inverted (white shows as black) then uncomment one of the next
// 2 lines try both options, one of the options should correct the inversion.
// #define TFT_INVERSION_ON
// #define TFT_INVERSION_OFF
// ##################################################################################
//
// Section 2. Define the pins that are used to interface with the display here
//
// ##################################################################################
// ###### EDIT THE PIN NUMBERS IN THE LINES FOLLOWING TO SUIT YOUR ESP32 SETUP ######
// For ESP32 Dev board (only tested with ILI9341 display)
// The hardware SPI can be mapped to any pins
#define TFT_MISO 12
#define TFT_MOSI 13
#define TFT_SCLK 14
#define TFT_CS 15 // Chip select control pin
#define TFT_DC 19 // Data Command control pin
//#define TFT_RST 4 // Reset pin (could connect to RST pin)
#define TFT_RST -1 // Set TFT_RST to -1 if display RESET is connected to ESP32 board RST
// ##################################################################################
//
// Section 3. Define the fonts that are to be used here
//
// ##################################################################################
// #define LOAD_GLCD // Font 1. Original Adafruit 8 pixel font needs ~1820 bytes in FLASH
// #define LOAD_FONT2 // Font 2. Small 16 pixel high font, needs ~3534 bytes in FLASH, 96 characters
// #define LOAD_FONT4 // Font 4. Medium 26 pixel high font, needs ~5848 bytes in FLASH, 96 characters
// #define LOAD_FONT6 // Font 6. Large 48 pixel font, needs ~2666 bytes in FLASH, only characters 1234567890:-.apm
// #define LOAD_FONT7 // Font 7. 7 segment 48 pixel font, needs ~2438 bytes in FLASH, only characters 1234567890:-.
// #define LOAD_FONT8 // Font 8. Large 75 pixel font needs ~3256 bytes in FLASH, only characters 1234567890:-.
// //#define LOAD_FONT8N // Font 8. Alternative to Font 8 above, slightly narrower, so 3 digits fit a 160 pixel TFT
// #define LOAD_GFXFF // FreeFonts. Include access to the 48 Adafruit_GFX free fonts FF1 to FF48 and custom fonts
// Comment out the #define below to stop the SPIFFS filing system and smooth font code being loaded
// this will save ~20kbytes of FLASH
//#define SMOOTH_FONT
// ##################################################################################
//
// Section 4. Other options
//
// ##################################################################################
// Define the SPI clock frequency, this affects the graphics rendering speed. Too
// fast and the TFT driver will not keep up and display corruption appears.
// With an ILI9341 display 40MHz works OK, 80MHz sometimes fails
// With a ST7735 display more than 27MHz may not work (spurious pixels and lines)
// With an ILI9163 display 27 MHz works OK.
#define SPI_FREQUENCY 40000000
// Optional reduced SPI frequency for reading TFT
#define SPI_READ_FREQUENCY 20000000
// The XPT2046 requires a lower SPI clock rate of 2.5MHz so we define that here:
#define SPI_TOUCH_FREQUENCY 2500000
// The ESP32 has 2 free SPI ports i.e. VSPI and HSPI, the VSPI is the default.
// If the VSPI port is in use and pins are not accessible (e.g. TTGO T-Beam)
// then uncomment the following line:
#define USE_HSPI_PORT
platformIO.ini
build_flags =
-D LV_CONF_INCLUDE_SIMPLE
-D LV_LVGL_H_INCLUDE_SIMPLE
-D LV_EX_CONF_INCLUDE_SIMPLE
main.cpp
#include <lvgl.h>
#include <TFT_eSPI.h>
#include <lv_examples.h>
TFT_eSPI tft = TFT_eSPI(); /* TFT instance */
static lv_disp_buf_t disp_buf;
static lv_color_t buf[LV_HOR_RES_MAX * 10];
void my_disp_flush(lv_disp_drv_t *disp, 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); //16bit
tft.endWrite();
lv_disp_flush_ready(disp);
}
void setup() {
lv_init();
tft.begin();
tft.setRotation(1);
lv_disp_buf_init(&disp_buf, buf, NULL, LV_HOR_RES_MAX * 10);
/*Initialize the display*/
lv_disp_drv_t disp_drv;
lv_disp_drv_init(&disp_drv);
disp_drv.hor_res = 320;
disp_drv.ver_res = 240;
disp_drv.flush_cb = my_disp_flush;
disp_drv.buffer = &disp_buf;
lv_disp_drv_register(&disp_drv);
//lv_demo_benchmark();
//lv_demo_widgets();
lv_demo_music();
}
void loop() {
lv_task_handler();
}