Levelreihenfolge, -fixes.

[hackover2013-badge-firmware.git] / drivers / displays / bitmap / ssd1306 / ssd1306.c

diff --git a/drivers/displays/bitmap/ssd1306/ssd1306.c b/drivers/displays/bitmap/ssd1306/ssd1306.c
index f8e4ee4..304d1ec 100644 (file)
--- a/drivers/displays/bitmap/ssd1306/ssd1306.c
+++ b/drivers/displays/bitmap/ssd1306/ssd1306.c
@@ -216,7 +216,7 @@ static void ssd1306DrawChar(uint16_t x, uint16_t y, uint8_t c, struct FONT_DEF f
     // Retrieve appropriate columns from font data
     for (col = 0; col < font.u8Width; col++)
     {
-      column[col] = font.au8FontTable[((c - 32) * font.u8Width) + col];    // Get first column of appropriate character
+      column[col] = font.au8FontTable[((c - font.u8FirstChar) * font.u8Width) + col];    // Get first column of appropriate character
     }
   }
   else
@@ -490,7 +490,7 @@ uint8_t ssd1306GetPixel(uint8_t x, uint8_t y)
 /**************************************************************************/
 void ssd1306ClearScreen() 
 {
-  memset(_ssd1306buffer, 0, 1024);
+  memset(_ssd1306buffer, 0x00, sizeof(_ssd1306buffer));
 }
 
 /**************************************************************************/
@@ -506,7 +506,7 @@ void ssd1306Refresh(void)
     CMD(SSD1306_SETSTARTLINE | 0x0); // line #0
 
     uint16_t i;
-    for (i=0; i<1024; i++) 
+    for (i = 0; i < sizeof(_ssd1306buffer); i++)
     {
       DATA(_ssd1306buffer[i]);
     }
@@ -518,7 +518,7 @@ void ssd1306Refresh(void)
     ssd1306SendCommand(SSD1306_SETSTARTLINE | 0x0); // line #0
 
     uint16_t i;
-    for (i=0; i<1024; i++) 
+    for (i = 0; i < sizeof(_ssd1306buffer); i++)
     {
       ssd1306SendData(_ssd1306buffer[i]);
     }