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Tasmota/tasmota/xdrv_54_lvgl.ino

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/*
xdrv_54_lvgl.ino - LVLG integration
Copyright (C) 2021 Stephan Hadinger, Berry language by Guan Wenliang https://github.com/Skiars/berry
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef USE_LVGL
#include <renderer.h>
#include "lvgl.h"
#include "tasmota_lvgl_assets.h" // force compilation of assets
#define XDRV_54 54
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/semphr.h"
#include "Adafruit_LvGL_Glue.h"
#ifdef USE_LVGL_PNG_DECODER
#include "lv_png.h"
#endif // USE_LVGL_PNG_DECODER
#ifdef USE_LVGL_FREETYPE
#include "lv_freetype.h"
#endif // USE_LVGL_FREETYPE
Adafruit_LvGL_Glue * glue;
// **************************************************
// Logging
// **************************************************
#if LV_USE_LOG
#ifdef USE_BERRY
static void lvbe_debug(const char *msg);
static void lvbe_debug(const char *msg) {
be_writebuffer("LVG: ", sizeof("LVG: "));
be_writebuffer(msg, strlen(msg));
be_writebuffer("\n", sizeof("\n"));
}
#endif
#endif
/************************************************************
* Main screen refresh function
************************************************************/
// This is the flush function required for LittlevGL screen updates.
// It receives a bounding rect and an array of pixel data (conveniently
// already in 565 format, so the Earth was lucky there).
void lv_flush_callback(lv_disp_drv_t *disp, const lv_area_t *area, lv_color_t *color_p);
void lv_flush_callback(lv_disp_drv_t *disp, const lv_area_t *area, lv_color_t *color_p) {
// Get pointer to glue object from indev user data
Adafruit_LvGL_Glue *glue = (Adafruit_LvGL_Glue *)disp->user_data;
uint16_t width = (area->x2 - area->x1 + 1);
uint16_t height = (area->y2 - area->y1 + 1);
// check if we are currently doing a screenshot
if (glue->getScreenshotFile() != nullptr) {
// save pixels to file
int32_t btw = (width * height * LV_COLOR_DEPTH + 7) / 8;
while (btw > 0) {
#if (LV_COLOR_DEPTH == 16) && (LV_COLOR_16_SWAP == 1)
uint16_t * pix = (uint16_t*) color_p;
for (uint32_t i = 0; i < btw / 2; i++) (pix[i] = pix[i] << 8 | pix[i] >> 8);
#endif
int32_t ret = glue->getScreenshotFile()->write((const uint8_t*) color_p, btw);
if (ret >= 0) {
btw -= ret;
} else {
btw = 0; // abort
}
}
lv_disp_flush_ready(disp);
return; // ok
}
Renderer *display = glue->display;
if (!glue->first_frame) {
//display->dmaWait(); // Wait for prior DMA transfer to complete
//display->endWrite(); // End transaction from any prior call
} else {
glue->first_frame = false;
}
uint32_t pixels_len = width * height;
uint32_t chrono_start = millis();
display->setAddrWindow(area->x1, area->y1, area->x1+width, area->y1+height);
display->pushColors((uint16_t *)color_p, pixels_len, false);
display->setAddrWindow(0,0,0,0);
uint32_t chrono_time = millis() - chrono_start;
lv_disp_flush_ready(disp);
if (pixels_len >= 10000 && (!display->lvgl_param.use_dma)) {
AddLog(LOG_LEVEL_DEBUG, D_LOG_LVGL "Refreshed %d pixels in %d ms (%i pix/ms)", pixels_len, chrono_time,
chrono_time > 0 ? pixels_len / chrono_time : -1);
}
}
/************************************************************
* Emulation of stdio for FreeType
*
************************************************************/
#ifdef USE_UFILESYS
extern "C" {
typedef void lvbe_FILE;
// FILE * fopen ( const char * filename, const char * mode );
lvbe_FILE * lvbe_fopen(const char * filename, const char * mode ) {
// Add "/" prefix
String file_path = "/";
file_path += filename;
File f = dfsp->open(file_path, mode);
// AddLog(LOG_LEVEL_INFO, "LVG: lvbe_fopen(%s) -> %i", file_path.c_str(), (int32_t)f);
// AddLog(LOG_LEVEL_INFO, "LVG: F=%*_H", sizeof(f), &f);
if (f) {
File * f_ptr = new File(f); // copy to dynamic object
*f_ptr = f; // TODO is this necessary?
return f_ptr;
}
return nullptr;
}
// int fclose ( FILE * stream );
int lvbe_fclose(lvbe_FILE * stream) {
File * f_ptr = (File*) stream;
f_ptr->close();
delete f_ptr;
// AddLog(LOG_LEVEL_INFO, "LVG: lvbe_fclose(%p)", f_ptr);
return 0;
}
// size_t fread ( void * ptr, size_t size, size_t count, FILE * stream );
size_t lvbe_fread(void * ptr, size_t size, size_t count, lvbe_FILE * stream) {
File * f_ptr = (File*) stream;
// AddLog(LOG_LEVEL_INFO, "LVG: lvbe_fread (%p, %i, %i, %p)", ptr, size, count, f_ptr);
int32_t ret = f_ptr->read((uint8_t*) ptr, size * count);
// AddLog(LOG_LEVEL_INFO, "LVG: lvbe_fread -> %i", ret);
if (ret < 0) { // error
ret = 0;
}
return ret;
}
// int fseek ( FILE * stream, long int offset, int origin );
int lvbe_fseek(lvbe_FILE * stream, long int offset, int origin ) {
File * f_ptr = (File*) stream;
// AddLog(LOG_LEVEL_INFO, "LVG: lvbe_fseek(%p, %i, %i)", f_ptr, offset, origin);
fs::SeekMode mode = fs::SeekMode::SeekSet;
if (SEEK_CUR == origin) {
mode = fs::SeekMode::SeekCur;
} else if (SEEK_END == origin) {
mode = fs::SeekMode::SeekEnd;
}
bool ok = f_ptr->seek(offset, mode);
return ok ? 0 : -1;
}
// long int ftell ( FILE * stream );
int lvbe_ftell(lvbe_FILE * stream) {
File * f_ptr = (File*) stream;
// AddLog(LOG_LEVEL_INFO, "LVG: lvbe_ftell(%p) -> %i", f_ptr, f_ptr->position());
return f_ptr->position();
}
}
#endif // USE_UFILESYS
/************************************************************
* Callbacks for file system access from LVGL
*
* Useful to load fonts or images from file system
************************************************************/
#ifdef USE_UFILESYS
static void * lvbe_fs_open(lv_fs_drv_t * drv, const char * path, lv_fs_mode_t mode);
static void * lvbe_fs_open(lv_fs_drv_t * drv, const char * path, lv_fs_mode_t mode) {
// AddLog(LOG_LEVEL_INFO, "LVG: lvbe_fs_open(%p, %p, %s, %i) %i", drv, file_p, path, mode, sizeof(File));
const char * modes = nullptr;
switch (mode) {
case LV_FS_MODE_WR:
modes = "w";
break;
case LV_FS_MODE_RD:
modes = "r";
break;
case LV_FS_MODE_WR | LV_FS_MODE_RD:
modes = "rw";
break;
}
if (modes == nullptr) {
AddLog(LOG_LEVEL_INFO, "LVG: fs_open, unsupported mode %d", mode);
return nullptr;
}
// Add "/" prefix
String file_path = "/";
file_path += path;
File f = dfsp->open(file_path.c_str(), modes);
// AddLog(LOG_LEVEL_INFO, "LVG: lvbe_fs_open(%s) -> %i", file_path.c_str(), (int32_t)f);
// AddLog(LOG_LEVEL_INFO, "LVG: F=%*_H", sizeof(f), &f);
if (f) {
File * f_ptr = new File(f); // copy to dynamic object
return f_ptr;
} else {
return nullptr;
}
}
static lv_fs_res_t lvbe_fs_close(lv_fs_drv_t * drv, void * file_p);
static lv_fs_res_t lvbe_fs_close(lv_fs_drv_t * drv, void * file_p) {
// AddLog(LOG_LEVEL_INFO, "LVG: lvbe_fs_close(%p, %p)", drv, file_p);
File * f_ptr = (File*) file_p;
f_ptr->close();
delete f_ptr;
return LV_FS_RES_OK;
}
static lv_fs_res_t lvbe_fs_read(lv_fs_drv_t * drv, void * file_p, void * buf, uint32_t btr, uint32_t * br);
static lv_fs_res_t lvbe_fs_read(lv_fs_drv_t * drv, void * file_p, void * buf, uint32_t btr, uint32_t * br) {
// AddLog(LOG_LEVEL_INFO, "LVG: lvbe_fs_read(%p, %p, %p, %i, %p)", drv, file_p, buf, btr, br);
File * f_ptr = (File*) file_p;
// AddLog(LOG_LEVEL_INFO, "LVG: F=%*_H", sizeof(File), f_ptr);
int32_t ret = f_ptr->read((uint8_t*) buf, btr);
// AddLog(LOG_LEVEL_INFO, "LVG: lvbe_fs_read -> %i", ret);
if (ret >= 0) {
*br = ret;
return LV_FS_RES_OK;
} else {
return LV_FS_RES_UNKNOWN;
}
}
static lv_fs_res_t lvbe_fs_write(lv_fs_drv_t * drv, void * file_p, const void * buf, uint32_t btw, uint32_t * bw);
static lv_fs_res_t lvbe_fs_write(lv_fs_drv_t * drv, void * file_p, const void * buf, uint32_t btw, uint32_t * bw) {
// AddLog(LOG_LEVEL_INFO, "LVG: lvbe_fs_write(%p, %p, %p, %i, %p)", drv, file_p, buf, btw, bw);
File * f_ptr = (File*) file_p;
int32_t ret = f_ptr->write((const uint8_t*) buf, btw);
if (ret >= 0) {
*bw = ret;
return LV_FS_RES_OK;
} else {
return LV_FS_RES_UNKNOWN;
}
}
static lv_fs_res_t lvbe_fs_tell(lv_fs_drv_t * drv, void * file_p, uint32_t * pos_p);
static lv_fs_res_t lvbe_fs_tell(lv_fs_drv_t * drv, void * file_p, uint32_t * pos_p) {
// AddLog(LOG_LEVEL_INFO, "LVG: lvbe_fs_tell(%p, %p, %p)", drv, file_p, pos_p);
File * f_ptr = (File*) file_p;
*pos_p = f_ptr->position();
return LV_FS_RES_OK;
}
static lv_fs_res_t lvbe_fs_seek(lv_fs_drv_t * drv, void * file_p, uint32_t pos, lv_fs_whence_t whence);
static lv_fs_res_t lvbe_fs_seek(lv_fs_drv_t * drv, void * file_p, uint32_t pos, lv_fs_whence_t whence) {
// AddLog(LOG_LEVEL_INFO, "LVG: lvbe_fs_seek(%p, %p, %i)", drv, file_p, pos);
File * f_ptr = (File*) file_p;
SeekMode seek;
switch (whence) {
case LV_FS_SEEK_SET: seek = SeekSet; break;
case LV_FS_SEEK_CUR: seek = SeekCur; break;
case LV_FS_SEEK_END: seek = SeekEnd; break;
default: return LV_FS_RES_UNKNOWN;
}
if (f_ptr->seek(pos, seek)) {
return LV_FS_RES_OK;
} else {
return LV_FS_RES_UNKNOWN;
}
}
static lv_fs_res_t lvbe_fs_size(lv_fs_drv_t * drv, void * file_p, uint32_t * size_p);
static lv_fs_res_t lvbe_fs_size(lv_fs_drv_t * drv, void * file_p, uint32_t * size_p) {
// AddLog(LOG_LEVEL_INFO, "LVG: lvbe_fs_size(%p, %p, %p)", drv, file_p, size_p);
File * f_ptr = (File*) file_p;
*size_p = f_ptr->size();
return LV_FS_RES_OK;
}
#endif // USE_UFILESYS
/*********************************************************************************************\
* Memory handler
* Use PSRAM if available
\*********************************************************************************************/
extern "C" {
/*
Use the following
extern void *lvbe_malloc(size_t size);
extern void lvbe_free(void *ptr);
extern void *lvbe_realloc(void *ptr, size_t size);
extern void *lvbe_calloc(size_t num, size_t size);
*/
void *lvbe_malloc(uint32_t size);
void *lvbe_realloc(void *ptr, size_t size);
void *lvbe_calloc(size_t num, size_t size);
#ifdef USE_BERRY_PSRAM
void *lvbe_malloc(uint32_t size) {
return special_malloc(size);
}
void *lvbe_realloc(void *ptr, size_t size) {
return special_realloc(ptr, size);
}
void *lvbe_calloc(size_t num, size_t size) {
return special_calloc(num, size);
}
#else // USE_BERRY_PSRAM
void *lvbe_malloc(uint32_t size) {
return malloc(size);
}
void *lvbe_realloc(void *ptr, size_t size) {
return realloc(ptr, size);
}
void *lvbe_calloc(size_t num, size_t size) {
return calloc(num, size);
}
#endif // USE_BERRY_PSRAM
void lvbe_free(void *ptr) {
free(ptr);
}
#ifdef USE_LVGL_PNG_DECODER
// for PNG decoder, use same allocators as LVGL
void* lodepng_malloc(size_t size) { return lvbe_malloc(size); }
void* lodepng_realloc(void* ptr, size_t new_size) { return lvbe_realloc(ptr, new_size); }
void lodepng_free(void* ptr) { lvbe_free(ptr); }
#endif // USE_LVGL_PNG_DECODER
}
/************************************************************
* Initialize the display / touchscreen drivers then launch lvgl
*
* We use Adafruit_LvGL_Glue to leverage the Adafruit
* display ecosystem.
************************************************************/
void start_lvgl(const char * uconfig);
void start_lvgl(const char * uconfig) {
if (glue != nullptr) {
AddLog(LOG_LEVEL_INFO, D_LOG_LVGL " LVGL was already initialized");
return;
}
if (!renderer || uconfig) {
#ifdef USE_UNIVERSAL_DISPLAY // TODO - we will probably support only UNIV_DISPLAY
renderer = Init_uDisplay((char*)uconfig);
if (!renderer) return;
#else
return;
#endif
}
renderer->DisplayOnff(true);
// **************************************************
// Initialize the glue between Adafruit and LVGL
// **************************************************
glue = new Adafruit_LvGL_Glue();
// Initialize glue, passing in address of display & touchscreen
LvGLStatus status = glue->begin(renderer, (void*)1, false);
if (status != LVGL_OK) {
AddLog(LOG_LEVEL_ERROR, PSTR("Glue error %d"), status);
return;
}
// Set the default background color of the display
// This is normally overriden by an opaque screen on top
#ifdef USE_BERRY
// By default set the display color to black and opacity to 100%
lv_disp_set_bg_color(NULL, lv_color_from_uint32(USE_LVGL_BG_DEFAULT));
lv_disp_set_bg_opa(NULL, LV_OPA_COVER);
lv_obj_set_style_bg_color(lv_scr_act(), lv_color_from_uint32(USE_LVGL_BG_DEFAULT), LV_PART_MAIN | LV_STATE_DEFAULT);
lv_obj_set_style_bg_opa(lv_scr_act(), LV_OPA_COVER, LV_PART_MAIN | LV_STATE_DEFAULT);
#if LV_USE_LOG
lv_log_register_print_cb(lvbe_debug);
#endif // LV_USE_LOG
#endif
#ifdef USE_UFILESYS
// Add file system mapping
static lv_fs_drv_t drv; // LVGL8, needs to be static and not on stack
lv_fs_drv_init(&drv); /*Basic initialization*/
drv.letter = 'A'; /*An uppercase letter to identify the drive */
drv.ready_cb = nullptr; /*Callback to tell if the drive is ready to use */
drv.open_cb = &lvbe_fs_open; /*Callback to open a file */
drv.close_cb = &lvbe_fs_close; /*Callback to close a file */
drv.read_cb = &lvbe_fs_read; /*Callback to read a file */
drv.write_cb = &lvbe_fs_write; /*Callback to write a file */
drv.seek_cb = &lvbe_fs_seek; /*Callback to seek in a file (Move cursor) */
drv.tell_cb = &lvbe_fs_tell; /*Callback to tell the cursor position */
drv.dir_open_cb = nullptr; /*Callback to open directory to read its content */
drv.dir_read_cb = nullptr; /*Callback to read a directory's content */
drv.dir_close_cb = nullptr; /*Callback to close a directory */
// drv.user_data = nullptr; /*Any custom data if required*/
lv_fs_drv_register(&drv); /*Finally register the drive*/
#endif // USE_UFILESYS
#ifdef USE_LVGL_FREETYPE
// initialize the FreeType renderer
lv_freetype_init(USE_LVGL_FREETYPE_MAX_FACES,
USE_LVGL_FREETYPE_MAX_SIZES,
UsePSRAM() ? USE_LVGL_FREETYPE_MAX_BYTES_PSRAM : USE_LVGL_FREETYPE_MAX_BYTES);
#endif
#ifdef USE_LVGL_PNG_DECODER
lv_png_init();
#endif // USE_LVGL_PNG_DECODER
if (UsePSRAM()) {
lv_img_cache_set_size(LV_IMG_CACHE_DEF_SIZE_PSRAM);
}
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_LVGL "LVGL initialized"));
}
/*********************************************************************************************\
* Interface
\*********************************************************************************************/
bool Xdrv54(uint8_t function)
{
bool result = false;
switch (function) {
case FUNC_INIT:
break;
case FUNC_LOOP:
if (glue) {
if (TasmotaGlobal.sleep > USE_LVGL_MAX_SLEEP) {
TasmotaGlobal.sleep = USE_LVGL_MAX_SLEEP; // sleep is max 10ms
}
lv_task_handler();
}
break;
case FUNC_EVERY_50_MSECOND:
break;
case FUNC_EVERY_100_MSECOND:
break;
case FUNC_EVERY_SECOND:
break;
case FUNC_COMMAND:
break;
case FUNC_RULES_PROCESS:
break;
case FUNC_SAVE_BEFORE_RESTART:
break;
case FUNC_MQTT_DATA:
break;
case FUNC_WEB_SENSOR:
break;
case FUNC_JSON_APPEND:
break;
case FUNC_BUTTON_PRESSED:
break;
}
return result;
}
#endif // USE_LVGL
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