[lvgl] base implementation (#7116)

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
2025-11-18 07:45:56 +00:00 · 2024-07-25 09:12:04 +10:00
parent 75635956cd
commit 23ffc3ddfb
21 changed files with 2359 additions and 0 deletions
--- a/esphome/components/lvgl/lvgl_esphome.cpp
+++ b/esphome/components/lvgl/lvgl_esphome.cpp
@@ -0,0 +1,129 @@
+#include "esphome/core/defines.h"
+#include "esphome/core/log.h"
+#include "esphome/core/helpers.h"
+#include "esphome/core/hal.h"
+#include "lvgl_hal.h"
+#include "lvgl_esphome.h"
+
+namespace esphome {
+namespace lvgl {
+static const char *const TAG = "lvgl";
+
+lv_event_code_t lv_custom_event;  // NOLINT
+void LvglComponent::dump_config() { ESP_LOGCONFIG(TAG, "LVGL:"); }
+void LvglComponent::draw_buffer_(const lv_area_t *area, const uint8_t *ptr) {
+  for (auto *display : this->displays_) {
+    display->draw_pixels_at(area->x1, area->y1, lv_area_get_width(area), lv_area_get_height(area), ptr,
+                            display::COLOR_ORDER_RGB, LV_BITNESS, LV_COLOR_16_SWAP);
+  }
+}
+
+void LvglComponent::flush_cb_(lv_disp_drv_t *disp_drv, const lv_area_t *area, lv_color_t *color_p) {
+  auto now = millis();
+  this->draw_buffer_(area, (const uint8_t *) color_p);
+  ESP_LOGV(TAG, "flush_cb, area=%d/%d, %d/%d took %dms", area->x1, area->y1, lv_area_get_width(area),
+           lv_area_get_height(area), (int) (millis() - now));
+  lv_disp_flush_ready(disp_drv);
+}
+
+void LvglComponent::setup() {
+  ESP_LOGCONFIG(TAG, "LVGL Setup starts");
+#if LV_USE_LOG
+  lv_log_register_print_cb(log_cb);
+#endif
+  lv_init();
+  lv_custom_event = static_cast<lv_event_code_t>(lv_event_register_id());
+  auto *display = this->displays_[0];
+  size_t buffer_pixels = display->get_width() * display->get_height() / this->buffer_frac_;
+  auto buf_bytes = buffer_pixels * LV_COLOR_DEPTH / 8;
+  auto *buf = lv_custom_mem_alloc(buf_bytes);
+  if (buf == nullptr) {
+    ESP_LOGE(TAG, "Malloc failed to allocate %zu bytes", buf_bytes);
+    this->mark_failed();
+    this->status_set_error("Memory allocation failure");
+    return;
+  }
+  lv_disp_draw_buf_init(&this->draw_buf_, buf, nullptr, buffer_pixels);
+  lv_disp_drv_init(&this->disp_drv_);
+  this->disp_drv_.draw_buf = &this->draw_buf_;
+  this->disp_drv_.user_data = this;
+  this->disp_drv_.full_refresh = this->full_refresh_;
+  this->disp_drv_.flush_cb = static_flush_cb;
+  this->disp_drv_.rounder_cb = rounder_cb;
+  switch (display->get_rotation()) {
+    case display::DISPLAY_ROTATION_0_DEGREES:
+      break;
+    case display::DISPLAY_ROTATION_90_DEGREES:
+      this->disp_drv_.sw_rotate = true;
+      this->disp_drv_.rotated = LV_DISP_ROT_90;
+      break;
+    case display::DISPLAY_ROTATION_180_DEGREES:
+      this->disp_drv_.sw_rotate = true;
+      this->disp_drv_.rotated = LV_DISP_ROT_180;
+      break;
+    case display::DISPLAY_ROTATION_270_DEGREES:
+      this->disp_drv_.sw_rotate = true;
+      this->disp_drv_.rotated = LV_DISP_ROT_270;
+      break;
+  }
+  display->set_rotation(display::DISPLAY_ROTATION_0_DEGREES);
+  this->disp_drv_.hor_res = (lv_coord_t) display->get_width();
+  this->disp_drv_.ver_res = (lv_coord_t) display->get_height();
+  ESP_LOGV(TAG, "sw_rotate = %d, rotated=%d", this->disp_drv_.sw_rotate, this->disp_drv_.rotated);
+  this->disp_ = lv_disp_drv_register(&this->disp_drv_);
+  for (const auto &v : this->init_lambdas_)
+    v(this->disp_);
+  lv_disp_trig_activity(this->disp_);
+  ESP_LOGCONFIG(TAG, "LVGL Setup complete");
+}
+}  // namespace lvgl
+}  // namespace esphome
+
+size_t lv_millis(void) { return esphome::millis(); }
+
+#if defined(USE_HOST) || defined(USE_RP2040) || defined(USE_ESP8266)
+void *lv_custom_mem_alloc(size_t size) {
+  auto *ptr = malloc(size);  // NOLINT
+  if (ptr == nullptr) {
+    esphome::ESP_LOGE(esphome::lvgl::TAG, "Failed to allocate %zu bytes", size);
+  }
+  return ptr;
+}
+void lv_custom_mem_free(void *ptr) { return free(ptr); }                            // NOLINT
+void *lv_custom_mem_realloc(void *ptr, size_t size) { return realloc(ptr, size); }  // NOLINT
+#else
+static unsigned cap_bits = MALLOC_CAP_SPIRAM | MALLOC_CAP_8BIT;  // NOLINT
+
+void *lv_custom_mem_alloc(size_t size) {
+  void *ptr;
+  ptr = heap_caps_malloc(size, cap_bits);
+  if (ptr == nullptr) {
+    cap_bits = MALLOC_CAP_8BIT;
+    ptr = heap_caps_malloc(size, cap_bits);
+  }
+  if (ptr == nullptr) {
+    esphome::ESP_LOGE(esphome::lvgl::TAG, "Failed to allocate %zu bytes", size);
+    return nullptr;
+  }
+#ifdef ESPHOME_LOG_HAS_VERBOSE
+  esphome::ESP_LOGV(esphome::lvgl::TAG, "allocate %zu - > %p", size, ptr);
+#endif
+  return ptr;
+}
+
+void lv_custom_mem_free(void *ptr) {
+#ifdef ESPHOME_LOG_HAS_VERBOSE
+  esphome::ESP_LOGV(esphome::lvgl::TAG, "free %p", ptr);
+#endif
+  if (ptr == nullptr)
+    return;
+  heap_caps_free(ptr);
+}
+
+void *lv_custom_mem_realloc(void *ptr, size_t size) {
+#ifdef ESPHOME_LOG_HAS_VERBOSE
+  esphome::ESP_LOGV(esphome::lvgl::TAG, "realloc %p: %zu", ptr, size);
+#endif
+  return heap_caps_realloc(ptr, size, cap_bits);
+}
+#endif