From 6ad9a82f54cc8e2a25d291d922d3bc3d27fbafcf Mon Sep 17 00:00:00 2001
From: Martijn Berntsen <mxberntsen@gmail.com>
Date: Sat, 2 Mar 2013 19:14:54 +0100
Subject: [PATCH] fixed drawing extended ascii characters fixed wrong bounding
 box calculation in 'drawchar' function

---
 ST7565/ST7565.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ST7565/ST7565.cpp b/ST7565/ST7565.cpp
index 802aac3..b7ccf8c 100644
--- a/ST7565/ST7565.cpp
+++ b/ST7565/ST7565.cpp
@@ -180,11 +180,11 @@ void ST7565::drawstring_P(uint8_t x, uint8_t line, const char *str) {
 
 void  ST7565::drawchar(uint8_t x, uint8_t line, char c) {
   for (uint8_t i =0; i<5; i++ ) {
-    st7565_buffer[x + (line*128) ] = pgm_read_byte(font+(c*5)+i);
+    st7565_buffer[x + (line*128) ] = pgm_read_byte(font+((unsigned char)c*5)+i);
     x++;
   }
 
-  updateBoundingBox(x, line*8, x+5, line*8 + 8);
+  updateBoundingBox(x-5, line*8, x-1, line*8 + 8);
 }