Diff: ACS712.cpp

Revision:

0:c0c26e03d080

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ACS712.cpp	Thu Oct 10 11:04:18 2019 +0000
@@ -0,0 +1,92 @@
+#include "ACS712.h"
+#include "mbed.h"
+
+// Constructor/Destructor
+ACS712::ACS712(PinName const outpin) 
+    
+    : 
+    
+    _aInPin(new AnalogIn(outpin))
+    
+{}
+
+ACS712::~ACS712()
+{
+    delete _aInPin;
+}
+
+// ----- Public Methods -----
+
+void ACS712::init() 
+{
+
+}
+double ACS712::read_current_sensor()
+{    
+    double val;
+    val = _aInPin->read();
+    val *= val;
+    val = sqrt(val);
+    return val;
+}
+
+int ACS712::read_ain_uint_16()
+{
+    int val = 0;
+    
+    val = _aInPin->read_u16();
+    
+    return val;
+}
+
+void ACS712::convert_to_amps(float acs_offset, float gain, int type)
+{   
+    
+    double _current_in = read_current_sensor()*3.3;
+    
+    switch(type) {
+        
+        case 5:
+        _current = (acs_offset*gain - _current_in*gain)/.185*gain;    
+        break;
+        case 20:
+        _current = (acs_offset*gain - _current_in*gain)/.100*gain;    
+        break;
+        case 30:
+        _current = (_current_in*gain - acs_offset*gain)/.066*gain; 
+        break;
+        default:
+        _current = 999.9;
+        break;
+        
+        }
+    
+}
+
+
+bool ACS712::over_current_detection(double operating_current)
+{    
+
+    bool current_spike_flag = false;
+    
+    if(_current > (1.1*operating_current)) {
+        
+        current_spike_flag = true;
+        
+        }
+    else {
+        
+        current_spike_flag = false;
+        
+        }
+    
+    return current_spike_flag;
+
+}
+
+float ACS712::get_current_amps()    
+{
+    
+    return _current;
+    
+}