How to run LVGL on M5Stack
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I did not take the same approach because I am not using the M5.Lcd class but TFT_eSPI
What I understand is that M5.Lcd is also based on TFT_eSPI but M5Stack did their own implementation.
As I want full portability on my other displays and ESP boards I decided not to use M5.Lcd.
However it should work in your case.
From what I see you are missing several initialization steps and I guess this is the reason why it is not workingHere is a sample you can use:
#include "M5Core2.h"
#include "lvgl.h"
#include "MyLVEventHandler.h"#define DISP_HOR_RES 320
#define DISP_VER_RES 240TFT_eSPI tft = TFT_eSPI(DISP_HOR_RES, DISP_VER_RES);
static lv_disp_draw_buf_t draw_buf;
void tft_lv_initialization()
{lv_init(); static lv_color_t buf1[(DISP_HOR_RES * DISP_VER_RES) / 10]; /*Declare a buffer for 1/10 screen size*/ static lv_color_t buf2[(DISP_HOR_RES * DISP_VER_RES) / 10]; // second buffer is optionnal lv_disp_draw_buf_init(&draw_buf, buf1, buf2, (DISP_HOR_RES * DISP_VER_RES) / 10); // Initialize `disp_buf` display buffer with the buffer(s). With only one buffer use NULL instead buf_2 tft.begin(); // TFT init tft.setRotation(1); // 1=horizontal 3=upside down 0=left 2=right}
// Display flushing
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(&color_p->full, w * h, true); tft.endWrite(); lv_disp_flush_ready(disp);}
void init_disp_driver()
{// Initialize the display static lv_disp_drv_t disp_drv; /*Descriptor of a display driver / //disp_drv.full_refresh = true; direct mode can also be set true*/ lv_disp_drv_init(&disp_drv); /*Basic initialization*/ disp_drv.flush_cb = my_disp_flush; /*Set your driver function*/ disp_drv.draw_buf = &draw_buf; /*Assign the buffer to the display*/ disp_drv.hor_res = DISP_HOR_RES; /*Set the horizontal resolution of the display*/ disp_drv.ver_res = DISP_VER_RES; /*Set the vertical resolution of the display*/ lv_disp_drv_register(&disp_drv); /*Finally register the driver*/}
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It seems you're not using the latest version of lvgl (the 8)
I'm trying to make it work here: https://github.com/PierreRambaud/drawing-board
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lol I'm from Toulouse :)
Yes I am using version 8, what makes you think otherwise?
I'll have a look at your GitHub files ;) -
@got said in How to run LVGL on M5Stack:
lv_conf.h
btw as you've already guessed, you have to tweak the lvgl_conf.h file otherwise it won't probably work out of the box
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@erich haha that's funny how the world is really small ^^
About the version 8, my bad, I was thinking about something else, I add an error with:
tft.pushColors(&color_p->full, w * h, true);
I had to change it to:
tft.pushColors((uint16_t*) &color_p->full, w * h, true);here's my lv_conf.h
/** * @file lv_conf.h * Configuration file for v8.0.2 */ /* * COPY THIS FILE AS `lv_conf.h` NEXT TO the `lvgl` FOLDER */ #if 1 /*Set it to "1" to enable content*/ #ifndef LV_CONF_H #define LV_CONF_H /*clang-format off*/ #include <stdint.h> #define LV_HOR_RES_MAX 320 #define LV_VER_RES_MAX 240 /*==================== COLOR SETTINGS *====================*/ /*Color depth: 1 (1 byte per pixel), 8 (RGB332), 16 (RGB565), 32 (ARGB8888)*/ #define LV_COLOR_DEPTH 32 /*Swap the 2 bytes of RGB565 color. Useful if the display has a 8 bit interface (e.g. SPI)*/ #define LV_COLOR_16_SWAP 0 /*Enable more complex drawing routines to manage screens transparency. *Can be used if the UI is above another layer, e.g. an OSD menu or video player. *Requires `LV_COLOR_DEPTH = 32` colors and the screen's `bg_opa` should be set to non LV_OPA_COVER value*/ #define LV_COLOR_SCREEN_TRANSP 0 /*Images pixels with this color will not be drawn if they are chroma keyed)*/ #define LV_COLOR_CHROMA_KEY lv_color_hex(0x00ff00) /*pure green*/ /*========================= MEMORY SETTINGS *=========================*/ /*1: use custom malloc/free, 0: use the built-in `lv_mem_alloc()` and `lv_mem_free()`*/ #define LV_MEM_CUSTOM 0 #if LV_MEM_CUSTOM == 0 /*Size of the memory available for `lv_mem_alloc()` in bytes (>= 2kB)*/ # define LV_MEM_SIZE (32U * 1024U) /*[bytes]*/ /*Set an address for the memory pool instead of allocating it as a normal array. Can be in external SRAM too.*/ # define LV_MEM_ADR 0 /*0: unused*/ #else /*LV_MEM_CUSTOM*/ # define LV_MEM_CUSTOM_INCLUDE <stdlib.h> /*Header for the dynamic memory function*/ # define LV_MEM_CUSTOM_ALLOC malloc # define LV_MEM_CUSTOM_FREE free # define LV_MEM_CUSTOM_REALLOC realloc #endif /*LV_MEM_CUSTOM*/ /*Use the standard `memcpy` and `memset` instead of LVGL's own functions. (Might or might not be faster).*/ #define LV_MEMCPY_MEMSET_STD 0 /*==================== HAL SETTINGS *====================*/ /*Default display refresh period. LVG will redraw changed ares with this period time*/ #define LV_DISP_DEF_REFR_PERIOD 30 /*[ms]*/ /*Input device read period in milliseconds*/ #define LV_INDEV_DEF_READ_PERIOD 30 /*[ms]*/ /*Use a custom tick source that tells the elapsed time in milliseconds. *It removes the need to manually update the tick with `lv_tick_inc()`)*/ #define LV_TICK_CUSTOM 0 #if LV_TICK_CUSTOM #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*/ /*Default Dot Per Inch. Used to initialize default sizes such as widgets sized, style paddings. *(Not so important, you can adjust it to modify default sizes and spaces)*/ #define LV_DPI_DEF 130 /*[px/inch]*/ /*======================= * FEATURE CONFIGURATION *=======================*/ /*------------- * Drawing *-----------*/ /*Enable complex draw engine. *Required to draw shadow, gradient, rounded corners, circles, arc, skew lines, image transformations or any masks*/ #define LV_DRAW_COMPLEX 1 #if LV_DRAW_COMPLEX != 0 /*Allow buffering some shadow calculation. *LV_SHADOW_CACHE_SIZE is the max. shadow size to buffer, where shadow size is `shadow_width + radius` *Caching has LV_SHADOW_CACHE_SIZE^2 RAM cost*/ #define LV_SHADOW_CACHE_SIZE 0 #endif /*LV_DRAW_COMPLEX*/ /*Default image cache size. Image caching keeps the images opened. *If only the built-in image formats are used there is no real advantage of caching. (I.e. if no new image decoder is added) *With complex image decoders (e.g. PNG or JPG) caching can save the continuous open/decode of images. *However the opened images might consume additional RAM. *0: to disable caching*/ #define LV_IMG_CACHE_DEF_SIZE 0 /*Maximum buffer size to allocate for rotation. Only used if software rotation is enabled in the display driver.*/ #define LV_DISP_ROT_MAX_BUF (10*1024) /*------------- * GPU *-----------*/ /*Use STM32's DMA2D (aka Chrom Art) GPU*/ #define LV_USE_GPU_STM32_DMA2D 0 #if LV_USE_GPU_STM32_DMA2D /*Must be defined to include path of CMSIS header of target processor e.g. "stm32f769xx.h" or "stm32f429xx.h"*/ #define LV_GPU_DMA2D_CMSIS_INCLUDE #endif /*Use NXP's PXP GPU iMX RTxxx platforms*/ #define LV_USE_GPU_NXP_PXP 0 #if LV_USE_GPU_NXP_PXP /*1: Add default bare metal and FreeRTOS interrupt handling routines for PXP (lv_gpu_nxp_pxp_osa.c) * and call lv_gpu_nxp_pxp_init() automatically during lv_init(). Note that symbol SDK_OS_FREE_RTOS * has to be defined in order to use FreeRTOS OSA, otherwise bare-metal implementation is selected. *0: lv_gpu_nxp_pxp_init() has to be called manually before lv_init() */ #define LV_USE_GPU_NXP_PXP_AUTO_INIT 0 #endif /*Use NXP's VG-Lite GPU iMX RTxxx platforms*/ #define LV_USE_GPU_NXP_VG_LITE 0 /*------------- * Logging *-----------*/ /*Enable the log module*/ #define LV_USE_LOG 1 #if LV_USE_LOG /*How important log should be added: *LV_LOG_LEVEL_TRACE A lot of logs to give detailed information *LV_LOG_LEVEL_INFO Log important events *LV_LOG_LEVEL_WARN Log if something unwanted happened but didn't cause a problem *LV_LOG_LEVEL_ERROR Only critical issue, when the system may fail *LV_LOG_LEVEL_USER Only logs added by the user *LV_LOG_LEVEL_NONE Do not log anything*/ # define LV_LOG_LEVEL LV_LOG_LEVEL_WARN /*1: Print the log with 'printf'; *0: User need to register a callback with `lv_log_register_print_cb()`*/ # define LV_LOG_PRINTF 0 /*Enable/disable LV_LOG_TRACE in modules that produces a huge number of logs*/ # define LV_LOG_TRACE_MEM 1 # define LV_LOG_TRACE_TIMER 1 # define LV_LOG_TRACE_INDEV 1 # define LV_LOG_TRACE_DISP_REFR 1 # define LV_LOG_TRACE_EVENT 1 # define LV_LOG_TRACE_OBJ_CREATE 1 # define LV_LOG_TRACE_LAYOUT 1 # define LV_LOG_TRACE_ANIM 1 #endif /*LV_USE_LOG*/ /*------------- * Asserts *-----------*/ /*Enable asserts if an operation is failed or an invalid data is found. *If LV_USE_LOG is enabled an error message will be printed on failure*/ #define LV_USE_ASSERT_NULL 1 /*Check if the parameter is NULL. (Very fast, recommended)*/ #define LV_USE_ASSERT_MALLOC 1 /*Checks is the memory is successfully allocated or no. (Very fast, recommended)*/ #define LV_USE_ASSERT_STYLE 0 /*Check if the styles are properly initialized. (Very fast, recommended)*/ #define LV_USE_ASSERT_MEM_INTEGRITY 0 /*Check the integrity of `lv_mem` after critical operations. (Slow)*/ #define LV_USE_ASSERT_OBJ 0 /*Check the object's type and existence (e.g. not deleted). (Slow)*/ /*Add a custom handler when assert happens e.g. to restart the MCU*/ #define LV_ASSERT_HANDLER_INCLUDE <stdint.h> #define LV_ASSERT_HANDLER while(1); /*Halt by default*/ /*------------- * Others *-----------*/ /*1: Show CPU usage and FPS count in the right bottom corner*/ #define LV_USE_PERF_MONITOR 0 /*1: Show the used memory and the memory fragmentation in the left bottom corner * Requires LV_MEM_CUSTOM = 0*/ #define LV_USE_MEM_MONITOR 0 /*1: Draw random colored rectangles over the redrawn areas*/ #define LV_USE_REFR_DEBUG 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_USE_FLOAT 0 #endif /*LV_SPRINTF_CUSTOM*/ #define LV_USE_USER_DATA 1 /*Garbage Collector settings *Used if lvgl is binded to higher level language and the memory is managed by that language*/ #define LV_ENABLE_GC 0 #if LV_ENABLE_GC != 0 # define LV_GC_INCLUDE "gc.h" /*Include Garbage Collector related things*/ #endif /*LV_ENABLE_GC*/ /*===================== * COMPILER SETTINGS *====================*/ /*For big endian systems set to 1*/ #define LV_BIG_ENDIAN_SYSTEM 0 /*Define a custom attribute to `lv_tick_inc` function*/ #define LV_ATTRIBUTE_TICK_INC /*Define a custom attribute to `lv_timer_handler` function*/ #define LV_ATTRIBUTE_TIMER_HANDLER /*Define a custom attribute to `lv_disp_flush_ready` function*/ #define LV_ATTRIBUTE_FLUSH_READY /*Required alignment size for buffers*/ #define LV_ATTRIBUTE_MEM_ALIGN_SIZE /*Will be added where memories needs to be aligned (with -Os data might not be aligned to boundary by default). * E.g. __attribute__((aligned(4)))*/ #define LV_ATTRIBUTE_MEM_ALIGN /*Attribute to mark large constant arrays for example font's bitmaps*/ #define LV_ATTRIBUTE_LARGE_CONST /*Complier prefix for a big array declaration in RAM*/ #define LV_ATTRIBUTE_LARGE_RAM_ARRAY /*Place performance critical functions into a faster memory (e.g RAM)*/ #define LV_ATTRIBUTE_FAST_MEM /*Prefix variables that are used in GPU accelerated operations, often these need to be placed in RAM sections that are DMA accessible*/ #define LV_ATTRIBUTE_DMA /*Export integer constant to binding. This macro is used with constants in the form of LV_<CONST> that *should also appear on LVGL binding API such as Micropython.*/ #define LV_EXPORT_CONST_INT(int_value) struct _silence_gcc_warning /*The default value just prevents GCC warning*/ /*Extend the default -32k..32k coordinate range to -4M..4M by using int32_t for coordinates instead of int16_t*/ #define LV_USE_LARGE_COORD 0 /*================== * FONT USAGE *===================*/ /*Montserrat fonts with ASCII range and some symbols using bpp = 4 *https://fonts.google.com/specimen/Montserrat*/ #define LV_FONT_MONTSERRAT_8 0 #define LV_FONT_MONTSERRAT_10 0 #define LV_FONT_MONTSERRAT_12 0 #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 0 #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*/ /*Pixel perfect monospace fonts*/ #define LV_FONT_UNSCII_8 0 #define LV_FONT_UNSCII_16 0 /*Optionally declare 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 /*Always set a default font*/ #define LV_FONT_DEFAULT &lv_font_montserrat_14 /*Enable handling large font and/or fonts with a lot of characters. *The limit depends on the font size, font face and bpp. *Compiler error will be triggered if a font needs it.*/ #define LV_FONT_FMT_TXT_LARGE 0 /*Enables/disables support for compressed fonts.*/ #define LV_USE_FONT_COMPRESSED 0 /*Enable subpixel rendering*/ #define LV_USE_FONT_SUBPX 0 #if LV_USE_FONT_SUBPX /*Set the pixel order of the display. Physical order of RGB channels. Doesn't matter with "normal" fonts.*/ #define LV_FONT_SUBPX_BGR 0 /*0: RGB; 1:BGR order*/ #endif /*================= * TEXT SETTINGS *=================*/ /** * Select a character encoding for strings. * Your IDE or editor should have the same character encoding * - LV_TXT_ENC_UTF8 * - LV_TXT_ENC_ASCII */ #define LV_TXT_ENC LV_TXT_ENC_UTF8 /*Can break (wrap) texts on these chars*/ #define LV_TXT_BREAK_CHARS " ,.;:-_" /*If a word is at least this long, will break wherever "prettiest" *To disable, set to a value <= 0*/ #define LV_TXT_LINE_BREAK_LONG_LEN 0 /*Minimum number of characters in a long word to put on a line before a break. *Depends on LV_TXT_LINE_BREAK_LONG_LEN.*/ #define LV_TXT_LINE_BREAK_LONG_PRE_MIN_LEN 3 /*Minimum number of characters in a long word to put on a line after a break. *Depends on LV_TXT_LINE_BREAK_LONG_LEN.*/ #define LV_TXT_LINE_BREAK_LONG_POST_MIN_LEN 3 /*The control character to use for signalling text recoloring.*/ #define LV_TXT_COLOR_CMD "#" /*Support bidirectional texts. Allows mixing Left-to-Right and Right-to-Left texts. *The direction will be processed according to the Unicode Bidirectioanl Algorithm: *https://www.w3.org/International/articles/inline-bidi-markup/uba-basics*/ #define LV_USE_BIDI 0 #if LV_USE_BIDI /*Set the default direction. Supported values: *`LV_BASE_DIR_LTR` Left-to-Right *`LV_BASE_DIR_RTL` Right-to-Left *`LV_BASE_DIR_AUTO` detect texts base direction*/ #define LV_BIDI_BASE_DIR_DEF LV_BASE_DIR_AUTO #endif /*Enable Arabic/Persian processing *In these languages characters should be replaced with an other form based on their position in the text*/ #define LV_USE_ARABIC_PERSIAN_CHARS 0 /*================== * WIDGET USAGE *================*/ /*Documentation of the widgets: https://docs.lvgl.io/latest/en/html/widgets/index.html*/ #define LV_USE_ARC 1 #define LV_USE_ANIMIMG 1 #define LV_USE_BAR 1 #define LV_USE_BTN 1 #define LV_USE_BTNMATRIX 1 #define LV_USE_CANVAS 1 #define LV_USE_CHECKBOX 1 #define LV_USE_DROPDOWN 1 /*Requires: lv_label*/ #define LV_USE_IMG 1 /*Requires: lv_label*/ #define LV_USE_LABEL 1 #if LV_USE_LABEL # define LV_LABEL_TEXT_SELECTION 1 /*Enable selecting text of the label*/ # define LV_LABEL_LONG_TXT_HINT 1 /*Store some extra info in labels to speed up drawing of very long texts*/ #endif #define LV_USE_LINE 1 #define LV_USE_ROLLER 1 /*Requires: lv_label*/ #if LV_USE_ROLLER # define LV_ROLLER_INF_PAGES 7 /*Number of extra "pages" when the roller is infinite*/ #endif #define LV_USE_SLIDER 1 /*Requires: lv_bar*/ #define LV_USE_SWITCH 1 #define LV_USE_TEXTAREA 1 /*Requires: lv_label*/ #if LV_USE_TEXTAREA != 0 # define LV_TEXTAREA_DEF_PWD_SHOW_TIME 1500 /*ms*/ #endif #define LV_USE_TABLE 1 /*================== * EXTRA COMPONENTS *==================*/ /*----------- * Widgets *----------*/ #define LV_USE_CALENDAR 1 #if LV_USE_CALENDAR # define LV_CALENDAR_WEEK_STARTS_MONDAY 0 # if LV_CALENDAR_WEEK_STARTS_MONDAY # define LV_CALENDAR_DEFAULT_DAY_NAMES {"Mo", "Tu", "We", "Th", "Fr", "Sa", "Su"} # else # define LV_CALENDAR_DEFAULT_DAY_NAMES {"Su", "Mo", "Tu", "We", "Th", "Fr", "Sa"} # endif # define LV_CALENDAR_DEFAULT_MONTH_NAMES {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"} # define LV_USE_CALENDAR_HEADER_ARROW 1 # define LV_USE_CALENDAR_HEADER_DROPDOWN 1 #endif /*LV_USE_CALENDAR*/ #define LV_USE_CHART 1 #define LV_USE_COLORWHEEL 1 #define LV_USE_IMGBTN 1 #define LV_USE_KEYBOARD 1 #define LV_USE_LED 1 #define LV_USE_LIST 1 #define LV_USE_METER 1 #define LV_USE_MSGBOX 1 #define LV_USE_SPINBOX 1 #define LV_USE_SPINNER 1 #define LV_USE_TABVIEW 1 #define LV_USE_TILEVIEW 1 #define LV_USE_WIN 1 #define LV_USE_SPAN 1 #if LV_USE_SPAN /*A line text can contain maximum num of span descriptor */ # define LV_SPAN_SNIPPET_STACK_SIZE 64 #endif /*----------- * Themes *----------*/ /*A simple, impressive and very complete theme*/ #define LV_USE_THEME_DEFAULT 1 #if LV_USE_THEME_DEFAULT /*0: Light mode; 1: Dark mode*/ # define LV_THEME_DEFAULT_DARK 0 /*1: Enable grow on press*/ # define LV_THEME_DEFAULT_GROW 1 /*Default transition time in [ms]*/ # define LV_THEME_DEFAULT_TRANSITON_TIME 80 #endif /*LV_USE_THEME_DEFAULT*/ /*An very simple them that is a good starting point for a custom theme*/ #define LV_USE_THEME_BASIC 1 /*A theme designed for monochrome displays*/ #define LV_USE_THEME_MONO 1 /*----------- * Layouts *----------*/ /*A layout similar to Flexbox in CSS.*/ #define LV_USE_FLEX 1 /*A layout similar to Grid in CSS.*/ #define LV_USE_GRID 1 /*================== * EXAMPLES *==================*/ /*Enable the examples to be built with the library*/ #define LV_BUILD_EXAMPLES 1 /*--END OF LV_CONF_H--*/ #endif /*LV_CONF_H*/ #endif /*End of "Content enable"*/I'll try to play with this configuration, thanks for helping me!
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I found something interesting:
rst:0xc (SW_CPU_RESET),boot:0x17 (SPI_FAST_FLASH_BOOT) configsip: 0, SPIWP:0xee clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00 mode:DIO, clock div:1 load:0x3fff0018,len:4 load:0x3fff001c,len:1044 load:0x40078000,len:10124 load:0x40080400,len:5856 entry 0x400806a8 Guru Meditation Error: Core 0 panic'ed (LoadProhibited). Exception was unhandled. Core 0 register dump: PC : 0x400d864f PS : 0x00060b30 A0 : 0x800d7c45 A1 : 0x3ffe3a10 A2 : 0x00000000 A3 : 0x3ffba588 A4 : 0x00000120 A5 : 0x00003400 A6 : 0xffffffff A7 : 0x00000000 A8 : 0x3ffcfdcc A9 : 0x00000020 A10 : 0x00000000 A11 : 0x40086244 A12 : 0x00000000 A13 : 0x00000120 A14 : 0x00000001 A15 : 0x00000120 SAR : 0x00000011 EXCCAUSE: 0x0000001c EXCVADDR: 0x00000022 LBEG : 0x400888a4 LEND : 0x400888c0 LCOUNT : 0xffffffff ELF file SHA256: 0000000000000000 Backtrace: 0x400d864f:0x3ffe3a10 0x400d7c42:0x3ffe3a30 0x400f2833:0x3ffe3a50 0x400d1585:0x3ffe3a70 0x400d15fe:0x3ffe3a90 0x400d1b9d:0x3ffe3ab0 0x4010a0ef:0x3ffe3bb0 0x40082c8d:0x3ffe3bd0 0x40082eb4:0x3ffe3c20 0x40079247:0x3ffe3c40 0x400792ad:0x3ffe3c70 0x400792b8:0x3ffe3ca0 0x40079465:0x3ffe3cc0 0x400806da:0x3ffe3df0 0x40007c15:0x3ffe3eb0 0x4000073d:0x3ffe3f20 Rebooting...I think, I've a lot of things to learn about Cpp and its ecosystem before continue ^^'
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Honestly I started off reading the LVGL online help and even though I am still learning I did not have much problem making the lib work on the Core2.
However I spent some significant time before understanding the whole concept (probably because I am getting too old :) ) and you seem to be way more experienced than me so you will make it work quickly :)My GitHub project is private (because it might end up being commercially used) but if you want I can extract the minimum code I used to display something if it can help and make it public.
By looking at the error (If I remember I got more or less the same) this looks like invalide pointer / memory allocation.
I realized that just initializing everything for LVGL to work is a real pain (when you've never played with it) but after you've understood the basic concepts it comes much clearer.
At this stage all basic things are working fine I am now moving on to Event management (button press, sliders move etc...).Btw you can also have a look at the EdgeLine application which is a kind of LVGL companion allowing you to WYSIWYG to C/Python code automatically for you. I am very bad at designing UIs so I am starting using it for my project and it can also help you understand the code which is generated.
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Haha, thank you, but I started learning C/C++ this Monday 👀
I'll try to investigate more about pointers /memory exceptions.
Everything I'll do will be on my GitHub in public repositories, my aim is to create a Tamagotchi for my daughter ^^' -
FYI, I correctly display a button, I have many things left to do next, like finding the reason why my DrawingBoard.cpp pointers are badly set, but in the end, you help me a lot!
Thanks again!For people reading this, I'll do my best to improve my GitHub repository in order to have a simple example for M5Core, explaining which parameters must be configured in lv_conf.h :)
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Hi Pierre,
Sorry I don't feel I did much for you but my (real) work is really taking much of my time (even what is supposed to be my free time) and I wish I could have spent more time working this out with you.
In any case my offer still stands, I can help you building up a simple template with comments for people to get started.
I already spent much time on it and I believe I have understood all the basic concepts .
As already said, now i need to go one step further with event management.
Also I am quite used to code in C (this is the language I started with a loooong time ago) I am not an expert but at least I can understand the most of what I do :)
Btw a good platform that I have adopted now since several months is VSCode + PIO...Very neat combination! -
I will omit the details,
Currently, M5Stack Core2 is working with LVGL v8.1.0 and Arduino IDE.
About lv_conf.h
The following three settings are required.lvgl-master v8.1.0 / src / lv_conf.h
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/* clang-format off */
#if 1 /Set it to "1" to enable content/ -
#define LV_COLOR_DEPTH 16
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#define LV_TICK_CUSTOM 1
#if LV_TICK_CUSTOM
#define LV_TICK_CUSTOM_INCLUDE "Arduino.h"
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Thank you @macsbug , this is exactly what I add to edit in my lv_conf.h in order to make it works!
https://github.com/PierreRambaud/drawing-board/blob/master/drawing-board.ino#L4@erich I updated my repository, it now works, but not as expected. I've two issues:
- I'm not able to change the label text each time I press a button (the reason of the seg fault)
- I'm not able to draw on the right side like the lvgl take the wrong space, or the tft I don't know yet which one ^^'
After that, everything will be ok (at least for this first project)
As you said, a good platform for development is the key, I work with emacs for years, but I never configured it for C language.
I've Arduino software open beside, only to compile & transfer. -
Thank you @GoT , This is a great program.
Thank you for publishing to github.problem
- not able to change the label text.
- The right side cannot be drawn.
Change DrawingBoard.cpp.
static lv_style_t style_color_label;
static lv_style_t style_size_label;
static lv_style_t style_clear_label;
static lv_style_t style_label;void DrawingBoard::setup() {
//lv_obj_t* _size_label = lv_label_create(lv_scr_act());
_size_label = lv_label_create(lv_scr_act());//lv_obj_add_style(_size_label, &style_label, 0);
lv_obj_add_style(_size_label, &style_size_label, 0);//lv_obj_add_style(_clear_label, &style_label, 0);
lv_obj_add_style(_clear_label, &style_clear_label, 0);void DrawingBoard::drawPoint(int32_t x, int32_t y) {
//_tft.drawCircle(x, y, _size, getColor());
//_tft.fillCircle(x, y, _size, getColor());
M5.Lcd.drawCircle(x, y, _size, getColor());
M5.Lcd.fillCircle(x, y, _size, getColor());void DrawingBoard::changeSize() {
//lv_label_set_text_fmt(_size_label, "Size: %d", _size);
lv_label_set_text_fmt(_size_label, "Size: %d", _size);void DrawingBoard::clear() {
//_tft.fillScreen(TFT_BLACK);
M5.Lcd.fillScreen(TFT_WHITE);postscript:
All 'tft's are possible with 'M5.Lcd'.
It is possible with M5.Lcd without using TFT_eSPI.
Development environment: LVGL 8.1.0 + Arduino IDE 1.8.19 -
@macsbug you're right, I did mention using TFT_eSPI instead of M5.Lcd only for portability reason.
I would like to create a set of sample files that I can use with any display and not only with M5Stack devices. -
OMG, it works as expected! <3
If both of you have GitHub account, I'd be glad to add you as credit for the awesome help! -
Great, I'm glad it works for you!
I don't feel I did much to help but anyways here is my GH account: https://github.com/erich74
At the moment I juste have a couple of private reps but I am planning to add public stuff when I get more used to M5Stack devices as this is becoming my main development/iot device platform.
I will come back to this thread as I will probably need some help when I progress with my current project ;) -
@erich you did more than you think.
Feel free to ask when you will need it, if the M5Core2 is enough to run your program, I would be glad to help as you did -
@got thanks, I will for sure ;)
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Here is what I came up with (and works with lvgl/lvgl 8.1 on my Core 2).
#include <M5Core2.h> #include <Arduino.h> #include <lvgl.h> #include <Wire.h> #include <SPI.h> // init the tft espi static lv_disp_draw_buf_t draw_buf; static lv_disp_drv_t disp_drv; // Descriptor of a display driver static lv_indev_drv_t indev_drv; // Descriptor of a touch driver M5Display *tft; static void ta_event_cb(lv_event_t * e); static lv_obj_t * kb; static void ta_event_cb(lv_event_t * e) { lv_event_code_t code = lv_event_get_code(e); lv_obj_t * ta = lv_event_get_target(e); if(code == LV_EVENT_CLICKED || code == LV_EVENT_FOCUSED) { /*Focus on the clicked text area*/ if(kb != NULL) lv_keyboard_set_textarea(kb, ta); } else if(code == LV_EVENT_READY) { LV_LOG_USER("Ready, current text: %s", lv_textarea_get_text(ta)); } } static void btnPowerOff_event(lv_event_t * event) { M5.Axp.PowerOff(); } void tft_lv_initialization() { M5.begin(); lv_init(); static lv_color_t buf1[(LV_HOR_RES_MAX * LV_VER_RES_MAX) / 10]; // Declare a buffer for 1/10 screen siz static lv_color_t buf2[(LV_HOR_RES_MAX * LV_VER_RES_MAX) / 10]; // second buffer is optionnal // Initialize `disp_buf` display buffer with the buffer(s). lv_disp_draw_buf_init(&draw_buf, buf1, buf2, (LV_HOR_RES_MAX * LV_VER_RES_MAX) / 10); tft = &M5.Lcd; } // Display flushing 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); tft->endWrite(); lv_disp_flush_ready(disp); } void init_disp_driver() { lv_disp_drv_init(&disp_drv); // Basic initialization disp_drv.flush_cb = my_disp_flush; // Set your driver function disp_drv.draw_buf = &draw_buf; // Assign the buffer to the display disp_drv.hor_res = LV_HOR_RES_MAX; // Set the horizontal resolution of the display disp_drv.ver_res = LV_VER_RES_MAX; // Set the vertical resolution of the display lv_disp_drv_register(&disp_drv); // Finally register the driver lv_disp_set_bg_color(NULL, lv_color_hex3(0x000)); // Set default background color to black } void my_touchpad_read(lv_indev_drv_t * drv, lv_indev_data_t * data) { TouchPoint_t pos = M5.Touch.getPressPoint(); bool touched = ( pos.x == -1 ) ? false : true; if(!touched) { data->state = LV_INDEV_STATE_RELEASED; } else { data->state = LV_INDEV_STATE_PRESSED; data->point.x = pos.x; data->point.y = pos.y; } } void init_touch_driver() { lv_disp_drv_register(&disp_drv); lv_indev_drv_init(&indev_drv); indev_drv.type = LV_INDEV_TYPE_POINTER; indev_drv.read_cb = my_touchpad_read; lv_indev_t * my_indev = lv_indev_drv_register(&indev_drv); // register } void setup() { tft_lv_initialization(); init_disp_driver(); init_touch_driver(); lv_obj_t * btn1 = lv_btn_create(lv_scr_act()); lv_obj_t * label = lv_label_create(btn1); lv_obj_align(btn1, LV_ALIGN_CENTER, 0, 0); lv_label_set_text(label, "Power Off"); lv_obj_center(label); lv_obj_add_event_cb(btn1, btnPowerOff_event, LV_EVENT_CLICKED, NULL); } void loop() { M5.update(); lv_task_handler(); } -
@jackrazors Thanks for sharing!