ssd1306_block_write();

            ssd1306_DrawString("Douche!", 2, 10);

typedef unsigned long Pos_t;

typedef unsigned long Size_t;

typedef unsigned long Color_t;

typedef   unsigned long  (*pfnDrawBlock_t)(

  Pos_t x,

  Pos_t y,

  Pos_t cx,

  Pos_t cy,

  const unsigned char* data);

typedef   unsigned long  (*pfnDrawPoint_t)(Pos_t x, Pos_t y, Color_t color);

typedef unsigned long(*pfnFontDrawChar)(pfnDrawBlock_t DrawBlock,Pos_t x, Pos_t y, unsigned int ch);

typedef  struct _DeviceProp

{

  pfnDrawBlock_t    pfnDrawBlok;

  pfnDrawPoint_t    pfnDrawPoint;

  Size_t            xPixel;

  Size_t            yPixel;

}DeviceProp;

typedef  struct  _Device

{

  const DeviceProp*   pDevProp;

  pfnFontDrawChar     pfnFont;

  Pos_t               curX;

  Pos_t               curY;

}Device;