Ian Aherne / quadrature_decoder

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Files at this revision

API Documentation at this revision

Revision 6:2fdce74d2a7b, committed 2019-03-28

Comitter:
ianaherne
Date:
Thu Mar 28 16:28:55 2019 +0000
Parent:
5:1a5772466668
Commit message:
added function to change limits

Changed in this revision

decoder.cpp Show annotated file Show diff for this revision Revisions of this file
decoder.h Show annotated file Show diff for this revision Revisions of this file 
--- a/decoder.cpp	Thu Mar 14 16:05:28 2019 +0000
+++ b/decoder.cpp	Thu Mar 28 16:28:55 2019 +0000
@@ -16,7 +16,10 @@
     _channelA.rise(this, &decoder::isr);   
    
     _count = 0;
-    _direction = 0;   
+    _direction = 0;  
+    
+    _lowerLimit = 0;
+    _upperLimit = 1; // set as default function must be called to change these values 
     
 }
 
@@ -42,7 +45,7 @@
         
         if(chB == 1){
         
-           if( _count != UPPER_LIMIT){
+           if( _count != _upperLimit){
               _count++;               
             }
             _direction = 1;
@@ -55,7 +58,7 @@
         
         if(chB == 0){
             
-            if(_count != LOWER_LIMIT){
+            if(_count != _lowerLimit){
               _count--;  
             }
             _direction = 0;
@@ -102,6 +105,25 @@
 }
 
 /**
+* @brief    setLimits()
+* @details  sets the limits of the encoder counting
+* @param    lower limit and upper limit
+* @return   
+* @warning  set to 0 and 1 by default by constructor user must change as required
+* 
+*/
+
+
+
+void decoder :: setLimits(int8_t lower, int8_t upper){
+    
+    _lowerLimit = lower;
+    _upperLimit = upper;
+    
+    
+}
+
+/**
 * @brief    reset()
 * @details  function to reset all internal counting and directional variables
 * @param    NA

--- a/decoder.h	Thu Mar 14 16:05:28 2019 +0000
+++ b/decoder.h	Thu Mar 28 16:28:55 2019 +0000
@@ -9,16 +9,7 @@
     
     public:
     
-    
-        /* These values control the upper and lower limits the the count will go to change limits to suit application*/
-        typedef enum{
-            
-            
-            LOWER_LIMIT = 0,
-            UPPER_LIMIT = 19
-            
-            
-        }limits_t;
+       
     
         decoder(PinName channelA,PinName channelB);
         
@@ -26,6 +17,7 @@
         
         int8_t getDirection();
         int16_t getCount();
+        void setLimits(int8_t lower, int8_t upper);
         void reset();
          
     
@@ -38,6 +30,9 @@
         
         int8_t _direction;
         int16_t _count;
+        int8_t _lowerLimit;
+        int8_t _upperLimit;
+