Diff: UniPWM.cpp

Revision:

0:559139f59504

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/UniPWM.cpp	Wed Jun 20 06:53:35 2012 +0000
@@ -0,0 +1,76 @@
+/* UniPWM PWM Library
+ * Copyright (c) 2012 Matt Parsons
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+ 
+ #include "mbed.h"
+ #include "UniPWM.h"
+ 
+    UniPWM::UniPWM(PinName pin) : PWMPin(pin){
+        Period=16667;
+        PWMMin=100;
+        PWMDuty=0;      //Default to Off
+        PWMStatus=0;    //All ints are all off.
+        PWMPin=0;       //Outputs are off
+        PWMMax=Period;
+    
+      //Pulse.attach_us(this,&UniPWM::SigStart,PWMDuty);    //no longer needed as the PWM defaults to off
+     }
+ 
+    void UniPWM::SigStart(){
+        PWMPin=1;
+        PulseEnd.attach_us(this,&UniPWM::SigStop,PWMDuty);   
+     }
+ 
+    void UniPWM::SigStop(){
+        PWMPin=0;
+     }
+ 
+    void UniPWM::write_us(int PosIn){
+        PWMDuty=PosIn;
+        
+        if(PWMStatus==0){
+        
+            if(PosIn>PWMMin){
+               PWMStatus=1;
+               Pulse.attach_us(this,&UniPWM::SigStart,Period);
+            }
+        }else if(PosIn <= PWMMin){
+            PWMStatus=0;
+            PosIn=0;
+            Pulse.detach();
+        }
+        
+        
+        if(PosIn>PWMMax){PWMDuty=PWMMax;}
+     }
+     
+     void UniPWM::duty(float dutIn){
+        dutIn=Period*dutIn;
+        int pos=(int)dutIn;
+        write_us(pos);
+     }
+     
+     int UniPWM::read_us(){
+        return PWMDuty;
+     }
+        
+ 
+ 
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