Diff: UniPWM.cpp
- Revision:
- 0:559139f59504
diff -r 000000000000 -r 559139f59504 UniPWM.cpp
--- /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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