Yoshitaka Kuwata / sseg

7 segment display library for mbed This routine support 2,4 and 8 digit anode-common or cathode-common LED.

Dependents:   7segMbed

Files at this revision

API Documentation at this revision

Revision 7:a19431131213, committed 2014-09-21

Comitter:
morecat_lab
Date:
Sun Sep 21 08:32:50 2014 +0000
Parent:
6:1de2abf828d6
Child:
9:6d3229c8dc0f
Commit message:
add _sinkDriver flag to drive segment pin

Changed in this revision

Sseg.cpp Show annotated file Show diff for this revision Revisions of this file
Sseg.h Show annotated file Show diff for this revision Revisions of this file 
--- a/Sseg.cpp	Thu Aug 07 11:44:22 2014 +0000
+++ b/Sseg.cpp	Sun Sep 21 08:32:50 2014 +0000
@@ -29,6 +29,7 @@
     _updateInterval = (8333 / 2);
     _zeroSupress = true;
     _kcommon = false;
+    _sinkDriver = false;
 }
 
 // 4 digit
@@ -41,6 +42,7 @@
     _updateInterval = (8333 / 4);
     _zeroSupress = true;
     _kcommon = false;
+    _sinkDriver = false;
 }
 
 // 8 digit
@@ -54,6 +56,7 @@
     _updateInterval = (8333 / 8);
     _zeroSupress = true;
     _kcommon = false;
+    _sinkDriver = false;
 }
 
 
@@ -70,6 +73,10 @@
     _kcommon = true;
 }
 
+void Sseg::setSinkDriver(void) {
+    _sinkDriver = true;
+}
+
 char Sseg::segCh(char i) {
     return Sseg::numConv[i];
 }
@@ -267,7 +274,7 @@
 void Sseg::updateSeg(void) {
     if( (++_dig) >= _numOfDigs)
         _dig = 0;
-    _segPins = ( _kcommon) ? _buffer[_dig] : ~_buffer[_dig];
+    _segPins = (( _kcommon) || (_sinkDriver)) ? _buffer[_dig] : ~_buffer[_dig];
 }
 
 bool Sseg::update(void) {

--- a/Sseg.h	Thu Aug 07 11:44:22 2014 +0000
+++ b/Sseg.h	Sun Sep 21 08:32:50 2014 +0000
@@ -48,6 +48,7 @@
     int _dig;       // support 4 or 8
     bool _zeroSupress;
     bool _kcommon;  // Cathode-common flag
+    bool _sinkDriver; // invert segment drive, if true
     void initConv(void);
     Timer timer;
 public:
@@ -129,6 +130,11 @@
      * use Anode Common LED (default)
      */
     void setAcommon(void);
+    
+    /**
+     * sink driver
+     */
+    void setSinkDriver(void);    
 
     /**
      * get a charcter pattern from a number