add lvgl

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "components/lvgl"]
+	path = components/lvgl
+	url = https://github.com/lvgl/lvgl.git

main/CMakeLists.txt

@@ -1,2 +1,3 @@
 idf_component_register(SRCS "main.c"
-                    INCLUDE_DIRS ".")
+                    INCLUDE_DIRS "."
+                    REQUIRES lvgl)

main/main.c

@@ -3,6 +3,10 @@
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 
+#define LV_CONF_INCLUDE_SIMPLE 1
+#include "lv_conf.h"
+#include "lvgl.h"
+
 
 #define I2C_SCL 1 /*FIXME*/
 #define I2C_SDA 2
@@ -95,6 +99,8 @@ void init_display(void){
 void app_main(void){
     init_i2c();
     init_display();
+    lv_init();
+
 
 
 }