esp32 support

- add esp32 support (arduino framework)
- change main file to c++ (arduino compatibility)
- add support for esp32 (tested with wt32 480x320)

hal/esp32/app_hal.cpp

@@ -0,0 +1,91 @@
+
+#include "app_hal.h"
+#include "lvgl.h"
+#include "PanelLan.h"
+
+PanelLan tft(BOARD_SC01_PLUS);
+
+static const uint32_t screenWidth = 480;
+static const uint32_t screenHeight = 320;
+
+const unsigned int lvBufferSize = screenWidth * 30;
+uint8_t lvBuffer[2][lvBufferSize];
+
+static lv_display_t *lvDisplay;
+static lv_indev_t *lvInput;
+
+#if LV_USE_LOG != 0
+static void lv_log_print_g_cb(lv_log_level_t level, const char *buf)
+{
+  LV_UNUSED(level);
+  LV_UNUSED(buf);
+}
+#endif
+
+/* Display flushing */
+void my_disp_flush(lv_display_t *display, const lv_area_t *area, unsigned char *data)
+{
+
+  uint32_t w = lv_area_get_width(area);
+  uint32_t h = lv_area_get_height(area);
+  lv_draw_sw_rgb565_swap(data, w * h);
+
+  if (tft.getStartCount() == 0)
+  {
+    tft.endWrite();
+  }
+  tft.pushImageDMA(area->x1, area->y1, area->x2 - area->x1 + 1, area->y2 - area->y1 + 1, (uint16_t *)data);
+  lv_display_flush_ready(display); /* tell lvgl that flushing is done */
+}
+
+/*Read the touchpad*/
+void my_touchpad_read(lv_indev_t *indev_driver, lv_indev_data_t *data)
+{
+  uint16_t touchX, touchY;
+  bool touched = tft.getTouch(&touchX, &touchY);
+  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;
+  }
+}
+
+static uint32_t my_tick(void)
+{
+  return millis();
+}
+
+void hal_setup(void)
+{
+
+  tft.init();
+  tft.initDMA();
+  tft.startWrite();
+  tft.fillScreen(TFT_BLACK);
+  tft.setRotation(1);
+
+  lv_tick_set_cb(my_tick);
+
+  lvDisplay = lv_display_create(screenWidth, screenHeight);
+  lv_display_set_color_format(lvDisplay, LV_COLOR_FORMAT_RGB565);
+  lv_display_set_flush_cb(lvDisplay, my_disp_flush);
+  lv_display_set_buffers(lvDisplay, lvBuffer[0], lvBuffer[1], lvBufferSize, LV_DISPLAY_RENDER_MODE_PARTIAL);
+
+  lvInput = lv_indev_create();
+  lv_indev_set_type(lvInput, LV_INDEV_TYPE_POINTER);
+  lv_indev_set_read_cb(lvInput, my_touchpad_read);
+
+}
+
+void hal_loop(void)
+{
+  // NO while loop in this function! (handled by framework)
+  lv_timer_handler(); // Update the UI-
+  delay(5);
+}

hal/esp32/app_hal.h

@@ -0,0 +1,17 @@
+#ifndef DRIVER_H
+#define DRIVER_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+void hal_setup(void);
+void hal_loop(void);
+
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /*DRIVER_H*/

platformio.ini

@@ -90,3 +90,21 @@ build_src_filter =
   +<../hal/stm32f429_disco>
   ; Force compile LVGL demo, remove when working on your own project
   +<../.pio/libdeps/stm32f429_disco/lvgl/demos>
+
+[env:esp32_sc01_plus]
+platform = espressif32
+board = esp32-s3-devkitm-1
+framework = arduino
+build_flags =
+  ${env.build_flags}
+  -D LV_LOG_LEVEL=LV_LOG_LEVEL_NONE
+  ; Add recursive dirs for hal headers search
+  !python -c "import os; print(' '.join(['-I {}'.format(i[0].replace('\x5C','/')) for i in os.walk('hal/esp32')]))"
+lib_deps =
+  ${env.lib_deps}
+  smartpanle/PanelLan@^0.0.1
+build_src_filter =
+  +<*>
+  +<../hal/esp32>
+  ; Force compile LVGL demo, remove when working on your own project
+  +<../.pio/libdeps/esp32_sc01_plus/lvgl/demos>

src/main.c → src/main.cpp

@@ -14,6 +14,21 @@
 
 #include "demos/lv_demos.h"
 
+#ifdef ARDUINO
+#include <Arduino.h>
+
+void setup() {
+  lv_init();
+  hal_setup();
+  lv_demo_widgets();
+}
+
+void loop() {
+  hal_loop(); // -< do not use while loop in this function
+}
+
+#else
+
 int main(void)
 {
 	lv_init();
@@ -24,3 +39,5 @@ int main(void)
 
 	hal_loop();
 }
+
+#endif