Add Dial support

README.md

@@ -8,7 +8,7 @@ Now we have also added a picture of the device shell as the border background,
 which can better simulate the display effect on the device side.
 
 <div align=center>
-<img src="images/lv_m5stack_fire.gif" width="25%"><img src="images/lv_m5stack_core2.gif" width="25%"><img src="images/lv_m5stack_cores3.gif" width="25%">
+<img src="images/lv_m5stack_fire.gif" width="25%"><img src="images/lv_m5stack_core2.gif" width="25%"><img src="images/lv_m5stack_cores3.gif" width="25%"><img src="images/lv_m5stack_dial.gif" width="24.78%">
 </div>
 
 ## How to install & use demo

platformio.ini

@@ -37,8 +37,8 @@ lib_archive = false
 build_flags =
   -l SDL2
   ${env.build_flags}
-  -D M5GFX_BACK_COLOR=0xFFFFFFU
   -D M5GFX_SHOW_FRAME
+  -D M5GFX_BACK_COLOR=0xFFFFFFU  ; background color
   -D M5GFX_SCALE=2
   -D M5GFX_ROTATION=0
 
@@ -140,3 +140,15 @@ build_flags =
 build_src_filter =
   +<*>
   +<../.pio/libdeps/emulator_StickCPlus2/lvgl/demos>
+
+
+[env:emulator_Dial]
+platform = native@^1.2.1
+extra_scripts = support/sdl2_build_extra.py
+build_type = debug
+build_flags =
+  ${env:emulator_common.build_flags}
+  -D M5GFX_BOARD=board_M5Dial
+build_src_filter =
+  +<*>
+  +<../.pio/libdeps/emulator_Dial/lvgl/demos>