Revision 2:cb3afc45028b, committed 2011-01-13

Comitter:

AjK

Date:

Thu Jan 13 11:09:22 2011 +0000

Parent:

1:611a8f5ac65c

Commit message:

1.5 See ChangeLog.h

Changed in this revision

--- a/ChangeLog.h	Thu Jan 13 09:53:26 2011 +0000
+++ b/ChangeLog.h	Thu Jan 13 11:09:22 2011 +0000
@@ -19,6 +19,10 @@
     OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
     THE SOFTWARE.
 
+    1.5     13 Jan 2011 - Made the isr() protected and made the class a friend of Ticker.
+                          Read the previous state and store when the sample frequency is
+                          set so that initial assert_deassert_held() isn't called at startup.
+                              
     1.4     13 Jan 2011 - Added an extra overloaded constructor that allows
                           the DigitalIn PinMode to be passed when the the class
                           is declared. So mode() isn't really needed but is left

--- a/PinDetect.h	Thu Jan 13 09:53:26 2011 +0000
+++ b/PinDetect.h	Thu Jan 13 11:09:22 2011 +0000
@@ -166,6 +166,8 @@
     
 public:
 
+    friend class Ticker;
+    
     PinDetect() { error("You must supply a PinName"); }
 
     /** PinDetect constructor
@@ -202,6 +204,7 @@
      */
     void setSampleFrequency(int i = PINDETECT_SAMPLE_PERIOD) { 
         _sampleTime = i; 
+        _prevState  = _in->read();        
         _ticker->attach_us( this, &PinDetect::isr, _sampleTime );
     }
     
@@ -449,7 +452,8 @@
      * Read the value of the pin being sampled.
      */
     operator int() { return _in->read(); }
-    
+
+protected:    
     /** The Ticker periodic callback function
      */
     void isr(void) {