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improve device and page buffer initialization

This commit is contained in:
devsaurus 2015-02-20 21:15:38 +01:00
parent e3ed4fc0da
commit 2cfb86b5b5
1 changed files with 11 additions and 11 deletions
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22
app/modules/u8g.c
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@ -1029,20 +1029,20 @@ static int lu8g_ssd1306_128x64_i2c( lua_State *L )
// this consumes heap even when the device is not used at all
#if 1
// build device entry
lud->dev.dev_fn = u8g_dev_ssd1306_128x64_fn;
lud->dev.dev_mem = &(lud->pb);
lud->dev.com_fn = U8G_COM_SSD_I2C;
// then allocate and populate page buffer
lud->pb.width = 128; // WIDTH in u8g_dev_ssd1306_128x64.c
lud->dev = (u8g_dev_t){ u8g_dev_ssd1306_128x64_fn, &(lud->pb), U8G_COM_SSD_I2C };
// populate and allocate page buffer
// constants taken from u8g_dev_ssd1306_128x64.c:
// PAGE_HEIGHT
// | Height
// | | WIDTH
// | | |
lud->pb = (u8g_pb_t){ { 8, 64, 0, 0, 0 }, 128, NULL };
//
if ((lud->pb.buf = (void *)c_zalloc(lud->pb.width)) == NULL)
return luaL_error( L, "out of memory" );
lud->pb.p.page_height = 8; // PAGE_HEIGHT in u8g_dev_ssd1306_128x64.c
lud->pb.p.total_height = 64; // HEIGHT in u8g_dev_ssd1306_128x64.c
lud->pb.p.page_y0 = 0;
lud->pb.p.page_y1 = 0;
lud->pb.p.page = 0;
// and finally init device using specific interface init function
u8g_InitI2C( LU8G, &(lud->dev), U8G_I2C_OPT_NONE);
#else
u8g_InitI2C( LU8G, &u8g_dev_ssd1306_128x64_i2c, U8G_I2C_OPT_NONE);