CHANGES.txt

@@ -0,0 +1,29 @@
+Version 1.4.0
+
+- ISSUE #6: Support for specifying dots on setDisplayToString
+  WARNING: setDisplayToString methods have changed prototype and are incompatible with code compiled for 1.3.x (if you specified a custom font)
+
+Version 1.3.2
+
+- ISSUE #5: Correction of string library import
+
+Version 1.3.1
+
+- changed pins on the examples 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

@@ -3,8 +3,6 @@ TM1638.h - Library for TM1638.
 
 Copyright (C) 2011 Ricardo Batista (rjbatista <at> gmail <dot> com)
 
-Based on a sketch by: Martin Hubacek (http://www.martinhubacek.cz)
-
 This program is free software: you can redistribute it and/or modify
 it under the terms of the version 3 GNU General Public License as
 published by the Free Software Foundation.
@@ -20,6 +18,7 @@ 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 +50,19 @@ 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 +72,11 @@ 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 +94,11 @@ 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++) {
@@ -101,10 +113,23 @@ void TM1638::clearDisplay()
   }
 }
 
-void TM1638::setDisplayToString(const char* string, const byte font[])
+void TM1638::setDisplayToString(const char* string, const byte dots, const byte font[])
 {
   for (int i = 0; i < 8; i++) {
-    sendData(i << 1, font[string[i] - 32]);
+    sendData(i << 1, font[string[i] - 32] | ((dots & (1 << (7 - i))) != 0 ? 0b10000000 : 0));
+  }
+}
+
+void TM1638::setDisplayToString(const String string, const byte dots, 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] | ((dots & (1 << (7 - i))) != 0 ? 0b10000000 : 0));
+    } else {
+      sendData(i << 1, 0);
+    }
   }
 }
 

TM1638.h

@@ -3,8 +3,6 @@ TM1638.h - Library for TM1638.
 
 Copyright (C) 2011 Ricardo Batista <rjbatista at gmail dot com>
 
-Based on a sketch by: Martin Hubacek (http://www.martinhubacek.cz)
-
 This program is free software: you can redistribute it and/or modify
 it under the terms of the version 3 GNU General Public License as
 published by the Free Software Foundation.
@@ -36,20 +34,24 @@ 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 */
+    /** Set the display to a unsigned hexadecimal number (with or without leading zeros) */
-    void setDisplayToHexNumber(unsigned long number, byte dots);
+    void setDisplayToHexNumber(unsigned long number, byte dots, boolean leadingZeros = true);
-    /** Set the display to a unsigned decimal number */
+    /** Set the display to a unsigned decimal number (with or without leading zeros) */
-    void setDisplayToDecNumber(unsigned long number, byte dots);
+    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);
+	void setDisplayToString(const char* string, const byte dots = 0, const byte font[] = FONT_DEFAULT);
+    /** Set the display to the String (defaults to built in font) */
+	void setDisplayToString(String string, const byte dots = 0, 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 +74,3 @@ 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
+// define a module on data pin 8, clock pin 9 and strobe pin 7
-TM1638 module(3, 2, 4);
+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(8, 9, 7),
-	TM1638(3, 2, 5),
+	TM1638(8, 9, 6),
-	TM1638(3, 2, 6),
+	TM1638(8, 9, 5),
-	TM1638(3, 2, 7)
+	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;