Fixes and improvements (#620)

- Standardized keyboard input using Unicode-based key codes across supported devices and the simulator. Keyboards don't emit `LV_KEY_*` anymore.
- Refactored lilygo encoder driver into a reusable GPIO rotary encoder driver (see `Drivers/gpio-encoder-module/`). Added more features to the config file.
- Improved LVGL keyboard device management, including duplicate prevention and reliable reconnects.
- LVGL file mutex now registers with lvgl start/stop
- Improved LVGL startup/shutdown stability and memory allocation reliability.
- Increased simulator LVGL memory capacity and improved USB device-class handling.

Buildscripts/module.cmake

@@ -11,18 +11,33 @@ macro(tactility_get_module_name NAME OUT_NAME)
 endmacro()
 
 macro(tactility_add_module NAME)
-    set(options)
+    # WHOLE_ARCHIVE: force every object file in this module into the final link unconditionally,
+    # instead of only the ones some other already-scanned archive currently has a pending
+    # undefined reference to. Needed when this module provides symbols a component it depends on
+    # (e.g. lvgl__lvgl's custom-allocator hooks) calls back into - a reverse reference a normal
+    # single-pass static-archive link can't resolve, since that component is scanned after this
+    # one's archive has already been passed once. POSIX builds link everything as plain OBJECT
+    # libraries (no archive-pruning to begin with), so this is a no-op there.
+    set(options WHOLE_ARCHIVE)
     set(oneValueArgs)
     set(multiValueArgs SRCS INCLUDE_DIRS PRIV_INCLUDE_DIRS REQUIRES PRIV_REQUIRES)
     cmake_parse_arguments(ARG "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
 
     if (DEFINED ENV{ESP_IDF_VERSION})
+        # idf_component_register's WHOLE_ARCHIVE is a presence-based flag (no value) - only pass
+        # the token at all when requested, rather than passing ARG_WHOLE_ARCHIVE's TRUE/FALSE as
+        # a value, which idf_component_register doesn't expect.
+        set(whole_archive_arg)
+        if (ARG_WHOLE_ARCHIVE)
+            set(whole_archive_arg WHOLE_ARCHIVE)
+        endif()
         idf_component_register(
             SRCS ${ARG_SRCS}
             INCLUDE_DIRS ${ARG_INCLUDE_DIRS}
             PRIV_INCLUDE_DIRS ${ARG_PRIV_INCLUDE_DIRS}
             REQUIRES ${ARG_REQUIRES}
             PRIV_REQUIRES ${ARG_PRIV_REQUIRES}
+            ${whole_archive_arg}
         )
     else()
         add_library(${NAME} OBJECT)

Buildscripts/sdkconfig/default.properties

@@ -19,7 +19,9 @@ CONFIG_LV_FS_STDIO_PATH=""
 CONFIG_LV_FS_STDIO_CACHE_SIZE=4096
 CONFIG_LV_USE_LODEPNG=y
 CONFIG_LV_USE_BUILTIN_MALLOC=n
-CONFIG_LV_USE_CLIB_MALLOC=y
+# Routes lv_malloc/realloc/free through Modules/lvgl-module/source/lv_mem_custom.c, which prefers
+# PSRAM (falls back to internal RAM automatically) instead of a fixed-size pool or plain malloc.
+CONFIG_LV_USE_CUSTOM_MALLOC=y
 CONFIG_LV_USE_MSGBOX=n
 CONFIG_LV_USE_SPINNER=n
 CONFIG_LV_USE_WIN=n