add u8g module stubs

app/include/user_config.h

@@ -65,6 +65,7 @@
 #define LUA_USE_MODULES_OW
 #define LUA_USE_MODULES_BIT
 #define LUA_USE_MODULES_MQTT
+#define LUA_USE_MODULES_U8G
 #endif /* LUA_USE_MODULES */
 
 // #define LUA_NUMBER_INTEGRAL

app/modules/Makefile

@@ -40,6 +40,7 @@ INCLUDES := $(INCLUDES) -I $(PDIR)include
 INCLUDES += -I ./
 INCLUDES += -I ../libc
 INCLUDES += -I ../mqtt
+INCLUDES += -I ../u8g
 INCLUDES += -I ../lua
 INCLUDES += -I ../platform
 INCLUDES += -I ../wofs

app/modules/auxmods.h

@@ -64,6 +64,9 @@ LUALIB_API int ( luaopen_wifi )( lua_State *L );
 #define AUXLIB_MQTT      "mqtt"
 LUALIB_API int ( luaopen_mqtt )( lua_State *L );
 
+#define AUXLIB_U8G      "u8g"
+LUALIB_API int ( luaopen_u8g )( lua_State *L );
+
 #define AUXLIB_NODE      "node"
 LUALIB_API int ( luaopen_node )( lua_State *L );
 

app/modules/modules.h

@@ -45,6 +45,14 @@
 #define ROM_MODULES_MQTT
 #endif
 
+#if defined(LUA_USE_MODULES_U8G)
+#define MODULES_U8G       "u8g"
+#define ROM_MODULES_U8G   \
+    _ROM(MODULES_U8G, luaopen_u8g, u8g_map)
+#else
+#define ROM_MODULES_MQTT
+#endif
+
 #if defined(LUA_USE_MODULES_I2C)
 #define MODULES_I2C       "i2c"
 #define ROM_MODULES_I2C   \
@@ -122,6 +130,7 @@
         ROM_MODULES_PWM		\
         ROM_MODULES_WIFI	\
         ROM_MODULES_MQTT    \
+        ROM_MODULES_U8G    \
         ROM_MODULES_I2C     \
         ROM_MODULES_SPI     \
         ROM_MODULES_TMR     \

app/modules/u8g.c

@@ -0,0 +1,99 @@
+// Module for U8glib
+
+//#include "lua.h"
+#include "lualib.h"
+#include "lauxlib.h"
+#include "platform.h"
+#include "auxmods.h"
+#include "lrotable.h"
+
+#include "c_string.h"
+#include "c_stdlib.h"
+
+#include "c_types.h"
+#include "mem.h"
+#include "espconn.h"
+
+typedef struct lu8g_userdata
+{
+    int some_data;
+} lu8g_userdata_t;
+
+
+static int lu8g_new( lua_State *L )
+{
+    lu8g_userdata_t *userdata = (lu8g_userdata_t *) lua_newuserdata( L, sizeof( lu8g_userdata_t ) );
+
+    userdata->some_data = 100;
+
+    // set its metatable
+    luaL_getmetatable(L, "u8g.display");
+    lua_setmetatable(L, -2);
+
+    return 1;
+}
+
+// Lua: u8g.setup( self, id )
+static int lu8g_setup( lua_State *L )
+{
+  unsigned id = luaL_checkinteger( L, 2 );
+
+  //MOD_CHECK_ID( u8g, id );
+
+  if (id == 0)
+    return luaL_error( L, "ID 0 not supported!" );
+
+  return 0;
+}
+
+
+// Module function map
+#define MIN_OPT_LEVEL 2
+#include "lrodefs.h"
+
+static const LUA_REG_TYPE u8g_display_map[] =
+{
+    { LSTRKEY( "setup" ),  LFUNCVAL( lu8g_setup ) },
+#if LUA_OPTIMIZE_MEMORY > 0
+    { LSTRKEY( "__index" ), LROVAL ( u8g_display_map ) },
+#endif
+    { LNILKEY, LNILVAL }
+};
+
+const LUA_REG_TYPE u8g_map[] = 
+{
+    { LSTRKEY( "new" ), LFUNCVAL ( lu8g_new ) },
+#if LUA_OPTIMIZE_MEMORY > 0
+    { LSTRKEY( "__metatable" ), LROVAL( u8g_map ) },
+#endif
+    { LNILKEY, LNILVAL }
+};
+
+LUALIB_API int ICACHE_FLASH_ATTR luaopen_u8g( lua_State *L )
+{
+#if LUA_OPTIMIZE_MEMORY > 0
+    luaL_rometatable(L, "u8g.display", (void *)u8g_display_map);  // create metatable
+    return 0;
+#else // #if LUA_OPTIMIZE_MEMORY > 0
+    int n;
+    luaL_register( L, AUXLIB_U8G, u8g_map );
+
+    // Set it as its own metatable
+    lua_pushvalue( L, -1 );
+    lua_setmetatable( L, -2 );
+
+    // Module constants  
+    // MOD_REG_NUMBER( L, "TCP", TCP );
+
+    // create metatable
+    luaL_newmetatable(L, "u8g.display");
+    // metatable.__index = metatable
+    lua_pushliteral(L, "__index");
+    lua_pushvalue(L,-2);
+    lua_rawset(L,-3);
+    // Setup the methods inside metatable
+    luaL_register( L, NULL, u8g_display_map );
+  
+    return 1;
+#endif // #if LUA_OPTIMIZE_MEMORY > 0  
+}