move display constructors into template-based functions
+ uniform generaration + addition of further displays - slight unneccesary heap allocation when display drivers are included but not used
This commit is contained in:
devsaurus
parent
02d473dab0
commit
1bc156e4d1
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@ -2,20 +2,38 @@
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#define __U8G_CONFIG_H__
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// ***************************************************************************
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// Configure U8glib fonts
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// add a U8G_FONT_TABLE_ENTRY for each font you want to compile into the image
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//
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// Add a U8G_FONT_TABLE_ENTRY for each font you want to compile into the image
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#define U8G_FONT_TABLE_ENTRY(font)
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#define U8G_FONT_TABLE \
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U8G_FONT_TABLE_ENTRY(font_6x10) \
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U8G_FONT_TABLE_ENTRY(font_chikita)
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#undef U8G_FONT_TABLE_ENTRY
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//
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// ***************************************************************************
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// ***************************************************************************
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// Enable display drivers
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#define U8G_SSD1306_128x64_I2C
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//#define U8G_SSD1306_128x64_SPI
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// untested
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#undef U8G_PCD8544_84x48
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//
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// Uncomment the U8G_DISPLAY_TABLE_ENTRY for the device(s) you want to
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// compile into the firmware.
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// Stick to the assignments to *_I2C and *_SPI tables.
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//
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// I2C based displays go into here:
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#define U8G_DISPLAY_TABLE_ENTRY(device, display)
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#define U8G_DISPLAY_TABLE_I2C \
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U8G_DISPLAY_TABLE_ENTRY(ssd1306_128x64_i2c, ssd1306_128x64)
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// SPI based displays go into here:
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#define U8G_DISPLAY_TABLE_SPI \
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U8G_DISPLAY_TABLE_ENTRY(ssd1306_128x64_hw_spi, ssd1306_128x64) \
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// U8G_DISPLAY_TABLE_ENTRY(pcd8544_84x48_hw_spi, pcd8544_84x48)
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#undef U8G_DISPLAY_TABLE_ENTRY
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//
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// ***************************************************************************
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#endif /* __U8G_CONFIG_H__ */
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@ -980,148 +980,68 @@ static int lu8g_close_display( lua_State *L )
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}
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// device constructors
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uint8_t u8g_dev_ssd1306_128x64_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg);
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// Lua: object = u8g.ssd1306_128x64_i2c( i2c_addr )
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static int lu8g_ssd1306_128x64_i2c( lua_State *L )
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{
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unsigned addr = luaL_checkinteger( L, 1 );
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if (addr == 0)
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return luaL_error( L, "i2c address required" );
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lu8g_userdata_t *lud = (lu8g_userdata_t *) lua_newuserdata( L, sizeof( lu8g_userdata_t ) );
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lud->u8g.i2c_addr = (uint8_t)addr;
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// Don't use the pre-defined device structure for u8g_dev_ssd1306_128x64_i2c here
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// Reason: linking the pre-defined structures allocates RAM for the device/comm structure
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// *before* the display is constructed (especially the page buffers)
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// this consumes heap even when the device is not used at all
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#if 0
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// build device entry
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lud->dev = (u8g_dev_t){ u8g_dev_ssd1306_128x64_fn, &(lud->pb), U8G_COM_SSD_I2C };
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// populate and allocate page buffer
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// constants taken from u8g_dev_ssd1306_128x64.c:
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// PAGE_HEIGHT
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// | Height
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// | | WIDTH
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// | | |
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lud->pb = (u8g_pb_t){ { 8, 64, 0, 0, 0 }, 128, NULL };
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// ***************************************************************************
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// Device constructors
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//
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if ((lud->pb.buf = (void *)c_zalloc(lud->pb.width)) == NULL)
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return luaL_error( L, "out of memory" );
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// and finally init device using specific interface init function
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u8g_InitI2C( LU8G, &(lud->dev), U8G_I2C_OPT_NONE);
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#else
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u8g_InitI2C( LU8G, &u8g_dev_ssd1306_128x64_i2c, U8G_I2C_OPT_NONE);
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#endif
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// set its metatable
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luaL_getmetatable(L, "u8g.display");
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lua_setmetatable(L, -2);
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return 1;
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}
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// Lua: object = u8g.ssd1306_128x64_spi( cs, dc, [res] )
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static int lu8g_ssd1306_128x64_spi( lua_State *L )
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{
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unsigned cs = luaL_checkinteger( L, 1 );
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if (cs == 0)
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return luaL_error( L, "CS pin required" );
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unsigned dc = luaL_checkinteger( L, 2 );
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if (dc == 0)
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return luaL_error( L, "D/C pin required" );
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unsigned res = luaL_optinteger( L, 3, U8G_PIN_NONE );
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lu8g_userdata_t *lud = (lu8g_userdata_t *) lua_newuserdata( L, sizeof( lu8g_userdata_t ) );
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// Don't use the pre-defined device structure for u8g_dev_ssd1306_128x64_spi here
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// Reason: linking the pre-defined structures allocates RAM for the device/comm structure
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// *before* the display is constructed (especially the page buffers)
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// this consumes heap even when the device is not used at all
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#if 0
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// build device entry
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lud->dev = (u8g_dev_t){ u8g_dev_ssd1306_128x64_fn, &(lud->pb), U8G_COM_HW_SPI };
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// populate and allocate page buffer
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// constants taken from u8g_dev_ssd1306_128x64.c:
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// PAGE_HEIGHT
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// | Height
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// | | WIDTH
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// | | |
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lud->pb = (u8g_pb_t){ { 8, 64, 0, 0, 0 }, 128, NULL };
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//
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if ((lud->pb.buf = (void *)c_zalloc(lud->pb.width)) == NULL)
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return luaL_error( L, "out of memory" );
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// and finally init device using specific interface init function
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u8g_InitHWSPI( LU8G, &(lud->dev), cs, dc, res );
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#else
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u8g_InitHWSPI( LU8G, &u8g_dev_ssd1306_128x64_hw_spi, cs, dc, res );
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#endif
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// set its metatable
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luaL_getmetatable(L, "u8g.display");
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lua_setmetatable(L, -2);
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return 1;
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// I2C based devices will use this function template to implement the Lua binding.
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#undef U8G_DISPLAY_TABLE_ENTRY
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#define U8G_DISPLAY_TABLE_ENTRY(device, display) \
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uint8_t u8g_dev_ ## display ## _fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg); \
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static int lu8g_ ## device( lua_State *L ) \
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{ \
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unsigned addr = luaL_checkinteger( L, 1 ); \
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\
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if (addr == 0) \
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return luaL_error( L, "i2c address required" ); \
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\
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lu8g_userdata_t *lud = (lu8g_userdata_t *) lua_newuserdata( L, sizeof( lu8g_userdata_t ) ); \
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\
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lud->u8g.i2c_addr = (uint8_t)addr; \
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\
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u8g_InitI2C( LU8G, &u8g_dev_ ## device, U8G_I2C_OPT_NONE); \
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\
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/* set its metatable */ \
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luaL_getmetatable(L, "u8g.display"); \
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lua_setmetatable(L, -2); \
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\
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return 1; \
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}
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uint8_t u8g_dev_pcd8544_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg);
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// Lua: object = u8g.pcd8544_84x48( sce, dc, res )
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static int lu8g_pcd8544_84x48( lua_State *L )
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{
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unsigned sce = luaL_checkinteger( L, 1 );
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if (sce == 0)
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return luaL_error( L, "SCE pin required" );
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unsigned dc = luaL_checkinteger( L, 2 );
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if (dc == 0)
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return luaL_error( L, "D/C pin required" );
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unsigned res = luaL_checkinteger( L, 3 );
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if (res == 0)
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return luaL_error( L, "RES pin required" );
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lu8g_userdata_t *lud = (lu8g_userdata_t *) lua_newuserdata( L, sizeof( lu8g_userdata_t ) );
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// Don't use the pre-defined device structure for u8g_dev_pcd8544_84x48_hw_spi here
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// Reason: linking the pre-defined structures allocates RAM for the device/comm structure
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// *before* the display is constructed (especially the page buffers)
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// this consumes heap even when the device is not used at all
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#if 0
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// build device entry
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lud->dev = (u8g_dev_t){ u8g_dev_pcd8544_fn, &(lud->pb), U8G_COM_HW_SPI };
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// populate and allocate page buffer
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// constants taken from u8g_dev_pcd8544_84x48.c:
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// PAGE_HEIGHT
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// | Height
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// | | WIDTH
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// | | |
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lud->pb = (u8g_pb_t){ { 8, 48, 0, 0, 0 }, 84, NULL };
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//
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if ((lud->pb.buf = (void *)c_zalloc(lud->pb.width)) == NULL)
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return luaL_error( L, "out of memory" );
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// and finally init device using specific interface init function
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u8g_InitHWSPI( LU8G, &(lud->dev), sce, dc, res );
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#else
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u8g_InitHWSPI( LU8G, &u8g_dev_pcd8544_84x48_hw_spi, sce, dc, res );
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#endif
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// set its metatable
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luaL_getmetatable(L, "u8g.display");
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lua_setmetatable(L, -2);
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return 1;
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// Unroll the display table and insert binding functions for I2C based displays.
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U8G_DISPLAY_TABLE_I2C
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//
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//
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//
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// SPI based devices will use this function template to implement the Lua binding.
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#undef U8G_DISPLAY_TABLE_ENTRY
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#define U8G_DISPLAY_TABLE_ENTRY(device, display) \
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uint8_t u8g_dev_ ## display ## _fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg); \
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static int lu8g_ ## device( lua_State *L ) \
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{ \
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unsigned cs = luaL_checkinteger( L, 1 ); \
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if (cs == 0) \
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return luaL_error( L, "CS pin required" ); \
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unsigned dc = luaL_checkinteger( L, 2 ); \
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if (dc == 0) \
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return luaL_error( L, "D/C pin required" ); \
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unsigned res = luaL_optinteger( L, 3, U8G_PIN_NONE ); \
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\
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lu8g_userdata_t *lud = (lu8g_userdata_t *) lua_newuserdata( L, sizeof( lu8g_userdata_t ) ); \
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\
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u8g_InitHWSPI( LU8G, &u8g_dev_ ## device, cs, dc, res ); \
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\
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/* set its metatable */ \
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luaL_getmetatable(L, "u8g.display"); \
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lua_setmetatable(L, -2); \
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\
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return 1; \
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}
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//
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// Unroll the display table and insert binding functions for SPI based displays.
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U8G_DISPLAY_TABLE_SPI
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//
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// ***************************************************************************
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// Module function map
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@ -1189,15 +1109,10 @@ static const LUA_REG_TYPE lu8g_display_map[] =
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const LUA_REG_TYPE lu8g_map[] =
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{
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#ifdef U8G_SSD1306_128x64_I2C
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{ LSTRKEY( "ssd1306_128x64_i2c" ), LFUNCVAL ( lu8g_ssd1306_128x64_i2c ) },
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#endif
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#ifdef U8G_SSD1306_128x64_I2C
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{ LSTRKEY( "ssd1306_128x64_spi" ), LFUNCVAL ( lu8g_ssd1306_128x64_spi ) },
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#endif
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#ifdef U8G_PCD8544_84x48
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{ LSTRKEY( "pcd8544_84x48" ), LFUNCVAL ( lu8g_pcd8544_84x48 ) },
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#endif
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#undef U8G_DISPLAY_TABLE_ENTRY
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#define U8G_DISPLAY_TABLE_ENTRY(device, display) { LSTRKEY( #device ), LFUNCVAL ( lu8g_ ##device ) },
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U8G_DISPLAY_TABLE_I2C
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U8G_DISPLAY_TABLE_SPI
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#if LUA_OPTIMIZE_MEMORY > 0
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@ -20,7 +20,7 @@ function init_spi_display()
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local res = 0 -- GPIO16
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spi.setup(1, spi.MASTER, spi.CPOL_LOW, spi.CPHA_LOW, spi.DATABITS_8, 0)
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disp = u8g.ssd1306_128x64_spi(cs, dc, res)
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disp = u8g.ssd1306_128x64_hw_spi(cs, dc, res)
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end
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@ -20,7 +20,7 @@ function init_spi_display()
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local res = 0 -- GPIO16
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spi.setup(1, spi.MASTER, spi.CPOL_LOW, spi.CPHA_LOW, spi.DATABITS_8, 0)
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disp = u8g.ssd1306_128x64_spi(cs, dc, res)
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disp = u8g.ssd1306_128x64_hw_spi(cs, dc, res)
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end
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@ -20,7 +20,7 @@ function init_spi_display()
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local res = 0 -- GPIO16
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spi.setup(1, spi.MASTER, spi.CPOL_LOW, spi.CPHA_LOW, spi.DATABITS_8, 0)
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disp = u8g.ssd1306_128x64_spi(cs, dc, res)
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disp = u8g.ssd1306_128x64_hw_spi(cs, dc, res)
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end
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