1 files changed, 11 insertions, 0 deletions
diff --git a/app/oled.c b/app/oled.c
index e5edfed..63a47fc 100644
--- a/app/oled.c
+++ b/app/oled.c
@@ -148,6 +148,17 @@ oled_blit_strip (uint8_t *vram, int x, int xe, uint8_t mask, int shift,
 {
   uint8_t r, s;
 
+  while (x < 0) {
+    x++;
+    src++;
+  };
+
+  if (xe < 0) xe = 0;
+
+  if (x > SSD1306_VRAM_SIZE) xe = SSD1306_VRAM_SIZE;
+
+  if (xe > SSD1306_VRAM_SIZE) xe = SSD1306_VRAM_SIZE;
+
 
   if (shift > 0) {
     for (x++; x <= xe; ++x) {