Hendrik Lipka / LcdWindow

Display text on LCD displays (even on multiple ones). Allow to create windows (frames) on display, and to combine them (split, add, duplicate, scroll). See http://mbed.org/users/hlipka/notebook/lcdwindow/ for more information.

Dependents:   Mbell

Diff: dogm_spi.cpp

Revision:
9:2fe93daa2106
Parent:
3:e5d5e2fe4bf6
--- a/dogm_spi.cpp	Mon Jan 10 22:57:59 2011 +0000
+++ b/dogm_spi.cpp	Tue Feb 22 22:57:44 2011 +0000
@@ -50,7 +50,8 @@
 void DogmLCDSPI::character(int column, int row, int c)
 {
     int address=(row)*0x40+(column);
-    _guard->take();
+    if (!_guard->take())
+        return;
     sendCmd((char)address|0x80);
     wait_ms(1);
     sendData(c);
@@ -61,7 +62,8 @@
 void DogmLCDSPI::writeText(const unsigned int column, const unsigned int row, const char text[])
 {
     int address=(row)*0x40+(column);
-    _guard->take();
+    if (!_guard->take())
+        return;
     sendCmd((char)address|0x80);
     wait_ms(1);
     
@@ -77,7 +79,8 @@
 
 void DogmLCDSPI::clear()
 {
-    _guard->take();
+    if (!_guard->take())
+        return;
     sendCmd(1);
     _guard->release();
 }