Version 1.3.1

CHANGES.txt

@@ -0,0 +1,20 @@
+Version 1.3.1
+
+- changed pins to match schematics on project site.
+
+Version 1.3.0
+
+- added support for String Object;
+- added support for removing leading zeros in displaying numbers.
+
+Version 1.2.0
+
+- added support for writing text.
+
+Version 1.1.0
+
+- restructuring and added 2 proper examples, available in the arduino ide.
+
+Version 1.0.0
+
+- 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)
 {
@@ -51,15 +52,19 @@ void TM1638::setupDisplay(boolean active, byte intensity)
 }
 
 
-void TM1638::setDisplayToHexNumber(unsigned long number, byte dots)
+void TM1638::setDisplayToHexNumber(unsigned long number, byte dots, boolean leadingZeros)
 {
   for (int i = 0; i < 8; i++) {
+	if (!leadingZeros && number == 0) {
+		clearDisplayDigit(7 - i, (dots & (1 << i)) != 0);
+	} else {
 		setDisplayDigit(number & 0xF, 7 - i, (dots & (1 << i)) != 0);
 		number >>= 4;
     }
   }
+}
 
-void TM1638::setDisplayToDecNumber(unsigned long number, byte dots)
+void TM1638::setDisplayToDecNumber(unsigned long number, byte dots, boolean leadingZeros)
 {
   if (number > 99999999L) {
     setDisplay(ERROR);
@@ -69,7 +74,11 @@ void TM1638::setDisplayToDecNumber(unsigned long number, byte dots)
         setDisplayDigit(number % 10, 7 - i, (dots & (1 << i)) != 0);
         number /= 10;
       } else {
+	    if (leadingZeros) {
 			setDisplayDigit(0, 7 - i, (dots & (1 << i)) != 0);
+		} else {
+			clearDisplayDigit(7 - i, (dots & (1 << i)) != 0);
+		}
       }
     }
   }
@@ -87,6 +96,11 @@ void TM1638::setDisplayDigit(byte digit, byte pos, boolean dot)
   sendData(pos << 1, NUMBER_DATA[digit & 0xF] | (dot ? 0b10000000 : 0));
 }
 
+void TM1638::clearDisplayDigit(byte pos, boolean dot)
+{
+  sendData(pos << 1, (dot ? 0b10000000 : 0));
+}
+
 void TM1638::setDisplay(const byte values[])
 {
   for (int i = 0; i < 8; i++) {
@@ -108,6 +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

@@ -36,20 +36,24 @@ class TM1638
     /** Set the display (segments and LEDs) active or off and intensity (range from 0-7). */
     void setupDisplay(boolean active, byte intensity);
 
-    /** Set the display to a unsigned hexadecimal number */
-    void setDisplayToHexNumber(unsigned long number, byte dots);
-    /** Set the display to a unsigned decimal number */
-    void setDisplayToDecNumber(unsigned long number, byte dots);
+    /** Set the display to a unsigned hexadecimal number (with or without leading zeros) */
+    void setDisplayToHexNumber(unsigned long number, byte dots, boolean leadingZeros = true);
+    /** Set the display to a unsigned decimal number (with or without leading zeros) */
+    void setDisplayToDecNumber(unsigned long number, byte dots, boolean leadingZeros = true);
     /** Set the display to a unsigned binary number */
     void setDisplayToBinNumber(byte number, byte dots);
     /** Set a single display at pos (starting at 0) to a digit (left to right) */ 
     void setDisplayDigit(byte digit, byte pos, boolean dot);
+    /** Clear  a single display at pos (starting at 0, left to right) */ 
+    void clearDisplayDigit(byte pos, boolean dot);
     /** Set the display to the 8 values (left to right) */
     void setDisplay(const byte values[]);
     /** Clear the display */
 	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);
@@ -72,4 +76,3 @@ class TM1638
 };
 
 #endif
-

examples/tm1638_one_module_example/tm1638_one_module_example.pde

@@ -18,8 +18,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include <TM1638.h>
 
-// define a module on data pin 3, clock pin 2 and strobe pin 4
-TM1638 module(3, 2, 4);
+// define a module on data pin 3, clock pin 9 and strobe pin 7
+TM1638 module(8, 9, 7);
 
 void setup() {
   // display a hexadecimal number and set the left 4 dots

examples/tm1638_scrolling_modules_example/tm1638_scrolling_modules_example.pde

@@ -22,10 +22,10 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 // define a modules
 TM1638 modules[] = {
-	TM1638(3, 2, 4),
-	TM1638(3, 2, 5),
-	TM1638(3, 2, 6),
-	TM1638(3, 2, 7)
+	TM1638(8, 9, 7),
+	TM1638(8, 9, 6),
+	TM1638(8, 9, 5),
+	TM1638(8, 9, 4)
 };
 
 void setup() {

examples/tm1638_two_modules_example/tm1638_two_modules_example.pde

@@ -24,9 +24,9 @@ const byte hello[] = {
 };
 
 // define the first module
-TM1638 module1(3, 2, 4);
+TM1638 module1(8, 9, 7);
 // to chain modules, use the same clk and data - just specify a different strobe pin
-TM1638 module2(3, 2, 5);
+TM1638 module2(8, 9, 6);
 
 unsigned long value = 0L;
 boolean state = true;