added support for String Object

CHANGES.txt

@@ -1,5 +1,6 @@
 Version 1.3.0
 
+- added support for String Object;
 - added support for removing leading zeros in displaying numbers.
 
 Version 1.2.0
@@ -12,4 +13,4 @@ Version 1.1.0
 
 Version 1.0.0
 
-- initial Release.
+- initial release.

TM1638.cpp

@@ -20,6 +20,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "WProgram.h"
 #include "TM1638.h"
+#include "String.h"
 
 TM1638::TM1638(byte dataPin, byte clockPin, byte strobePin, boolean activateDisplay, byte intensity)
 {
@@ -121,6 +122,19 @@ void TM1638::setDisplayToString(const char* string, const byte font[])
   }
 }
 
+void TM1638::setDisplayToString(const String string, const byte font[])
+{
+  int stringLength = string.length();
+
+  for (int i = 0; i < 8; i++) {
+    if (i < stringLength) {
+		sendData(i << 1, font[string.charAt(i) - 32]);
+	} else {
+		sendData(i << 1, 0);
+	}
+  }
+}
+
 void TM1638::setLED(byte color, byte pos)
 {
     sendData((pos << 1) + 1, color);  

TM1638.h

@@ -52,6 +52,8 @@ class TM1638
 	void clearDisplay();
     /** Set the display to the string (defaults to built in font) */
 	void setDisplayToString(const char* string, const byte font[] = FONT_DEFAULT);
+    /** Set the display to the String (defaults to built in font) */
+	void setDisplayToString(String string, const byte font[] = FONT_DEFAULT);
 
     /** Set the LED at pos to color (TM1638_COLOR_RED, TM1638_COLOR_GREEN or both) */
     void setLED(byte color, byte pos);