Diff: IRM2121.cpp

Revision:

0:bb38fe5771fb

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/IRM2121.cpp	Thu Feb 26 05:30:39 2015 +0000
@@ -0,0 +1,51 @@
+/* mbed Ping Library respected Library !!
+ *
+ * make interruptin_mod by bousiya03
+ * 
+ */
+
+
+#include "IRM2121.h"
+#include "mbed.h"
+
+IRM2121::IRM2121(PinName IRM_PIN)
+        : _pin(IRM_PIN), _timer()
+{          
+
+} 
+        
+unsigned int IRM2121::Read(void)
+// 0 means not valid.
+{
+    
+     
+    _timer.reset();
+    _timer.start();
+    
+    while(_pin){
+     if(_timer.read_us() > NAKATA){
+        _timer.stop();
+        return NOT_F;
+     }  
+    }
+    
+    _timer.reset();
+    
+    while(!_pin){
+     if(_timer.read_us() > NAKATA){
+        _timer.stop();
+        return NOT_F;
+     }   
+    }
+    _Time = _timer.read_us();
+    while(_pin){
+      if((_timer.read_us() -_Time) > NAKATA){
+        _timer.stop();
+        return NOT_F;
+      }  
+    }
+    
+    _Time = _timer.read_us() - _Time;
+    _timer.stop();
+    return _Time;
+}