diff --git a/ssd1306.c b/ssd1306.c
--- a/ssd1306.c
+++ b/ssd1306.c
@@ -26,8 +26,7 @@
 #define   SSD1303_Buffer    (_SSD1303_Buffer + SSD1303_COLUMN_MARGIN_START)
 
 /* Private variables ---------------------------------------------------------*/
-static  uint8_t  _SSD1303_Buffer[SSD1303_COLUMN_NUMBER*SSD1303_PAGE_NUMBER 
-+ SSD1303_COLUMN_MARGIN_START + SSD1303_COLUMN_MARGIN_END] = {0};
+static  uint8_t  _SSD1303_Buffer[SSD1303_COLUMN_NUMBER*SSD1303_PAGE_NUMBER + SSD1303_COLUMN_MARGIN_START + SSD1303_COLUMN_MARGIN_END] = {0};
 static  uint8_t  pageIndex = 0;
 static  uint8_t  iS_SSD_On = 0;
 static  uint8_t  pre_on = 0;
@@ -81,6 +80,10 @@ void WriteData(unsigned char data)
 *******************************************************************************/
 void SSD1303_Init(void)
 {
+
+  /* Initialize SPI2 */
+  // TODO
+
   /* Generate a reset */
   SSD_Reset_Low();
   uint32_t i ;