Diff: hcsr04.h

Revision:

0:86b2086be101

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hcsr04.h	Mon Apr 14 08:23:09 2014 +0000
@@ -0,0 +1,50 @@
+/* File: HCSR04.h
+ * Author: Antonio Buonanno  
+ *Board: STM NUCLEO F401RE, 
+ *Hardware: Ultrasonic Range HC-SR04,  
+ * 
+ *This work derived from Arduino library, 
+ *
+ * Desc: driver for HCSR04 Ultrasonic Range Finder.  The returned range
+ *       is in units of meters.
+ *  
+ *       
+ *
+*/
+
+/* EXAMPLE
+#include "mbed.h"
+#include "hcsr04.h"
+
+//D12 TRIGGER D11 ECHO
+   HCSR04 sensor(D12, D11); 
+int main() {
+    while(1) {
+        
+     long distance = sensor.distance();   
+      printf("distanza  %d  \n",distance);
+      wait(1.0); // 1 sec  
+        
+    }
+}
+*/
+#ifndef hcsr04_H
+#define hcsr04_H
+#include "mbed.h"
+
+
+ 
+class HCSR04 {
+  public:
+    HCSR04(PinName t, PinName e);
+    long echo_duration();
+    long distance();
+ 
+    private:
+        DigitalOut trig;
+        DigitalIn echo;
+        Timer timer;
+        long duration,distance_cm;
+};
+ 
+#endif
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