Revision 0:2a1510763167, committed 2021-01-11

Comitter:

fermedicius

Date:

Mon Jan 11 10:59:03 2021 +0000

Commit message:

Test

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hcsr04.cpp	Mon Jan 11 10:59:03 2021 +0000
@@ -0,0 +1,29 @@
+#include "hcsr04.h"
+#include "mbed.h"
+/*
+*HCSR04.cpp
+*/
+HCSR04::HCSR04(PinName t, PinName e) : trig(t), echo(e) {}
+ long HCSR04::echo_duration() {
+        
+    timer.reset();  //reset timer
+    trig=0;   // trigger low 
+    wait_us(2); //  wait 
+    trig=1;   //  trigger high
+    wait_us(10);
+    trig=0;  // trigger low
+         while(!echo); // start pulseIN
+      timer.start();
+     while(echo);
+      timer.stop();
+     return timer.read_us(); 
+ 
+}
+ 
+//return distance in cm 
+long HCSR04::distance(){
+    duration = echo_duration();
+  distance_cm = (duration/2)/29.1  ;
+        return distance_cm;
+
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hcsr04.h	Mon Jan 11 10:59:03 2021 +0000
@@ -0,0 +1,20 @@
+#ifndef HCSR04_H
+#define HCSR04_H
+#include "mbed.h"
+
+
+ 
+class HCSR04 {
+  public:
+    HCSR04(PinName t, PinName e);
+    long echo_duration();
+    long distance();
+ 
+    protected:
+        DigitalOut trig;
+        DigitalIn echo;
+        Timer timer;
+        long duration,distance_cm;
+};
+ 
+#endif
\ No newline at end of file