Revision 0:813970f650f3, committed 2018-06-18

Comitter:

DuyLionTran

Date:

Mon Jun 18 07:38:21 2018 +0000

Commit message:

version 1.3.7 04-06-2018 Some minor bugs fixed

Changed in this revision

diff -r 000000000000 -r 813970f650f3 LM35.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LM35.cpp	Mon Jun 18 07:38:21 2018 +0000
@@ -0,0 +1,60 @@
+#include "LM35.h"
+
+LM35Therm::LM35Therm(PinName analogPin, float compensation) {
+    _pAin = new AnalogIn(analogPin);
+    _calibrate = compensation;
+    _isFirstRead = true;
+}
+
+LM35Therm::~LM35Therm() {
+    delete _pAin;
+}
+
+void LM35Therm::getAverageValue() {
+    _sumAnalog = 0;
+    
+    for (uint8_t i = 0; i < SAMPLE_COUNT; i++) {
+        analogSamples[i] = _pAin->read();
+    }  
+    
+    for (uint8_t i = 0; i < SAMPLE_COUNT; i++) {
+        _sumAnalog = _sumAnalog + analogSamples[i];   
+    }  
+    
+    averageAnalog = _sumAnalog / SAMPLE_COUNT;
+    _sumAnalog = 0;
+    
+    if (_isFirstRead) {
+        for (uint8_t i = 0; i < SAMPLE_COUNT; i++) {
+            analogAverageSamples[i] = averageAnalog;
+            _sumAnalog = _sumAnalog + analogAverageSamples[i];
+        }        
+        filtedAvgAnalog = _sumAnalog / SAMPLE_COUNT;
+        _isFirstRead = false;    
+    }
+    else {
+        for (uint8_t i = 0; i < SAMPLE_COUNT - 1; i++) {
+            analogAverageSamples[i] = analogAverageSamples[i];
+            _sumAnalog = _sumAnalog + analogAverageSamples[i];
+        }       
+        analogAverageSamples[SAMPLE_COUNT - 1] = averageAnalog;      
+        _sumAnalog = _sumAnalog + analogAverageSamples[SAMPLE_COUNT - 1];
+    }
+    filtedAvgAnalog = _sumAnalog / SAMPLE_COUNT;
+}
+
+void LM35Therm::setCompensation(float newCompensation) {
+    _calibrate = newCompensation;
+}
+
+float LM35Therm::LM35Therm::getTempInC() {
+    _readVoltage  = filtedAvgAnalog * 3.3;
+    float avgVolt = filtedAvgAnalog * _calibrate * 1000.0;
+    tempInC       = avgVolt;
+    return tempInC;
+}
+
+float LM35Therm::LM35Therm::getTempInF() {
+    tempInF = (9.0 * tempInC)/5.0 + 32.0;
+    return tempInF;
+}
\ No newline at end of file

diff -r 000000000000 -r 813970f650f3 LM35.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LM35.h	Mon Jun 18 07:38:21 2018 +0000
@@ -0,0 +1,41 @@
+#ifndef __LM35_H__
+#define __LM35_H__
+
+#include "mbed.h"
+
+#define SAMPLE_COUNT    30
+
+class LM35Therm {
+private:
+    AnalogIn *_pAin;
+    bool  _isFirstRead;
+    
+    float _sumAnalog;
+    float _calibrate;
+    
+    float analogSamples[SAMPLE_COUNT];
+    float analogAverageSamples[SAMPLE_COUNT];    
+//    float _readVoltage;
+    
+public:
+    float tempInC;
+    float tempInF;
+    
+    float averageAnalog;
+    float filtedAvgAnalog;
+    
+    float _readVoltage;
+    
+public:
+    LM35Therm(PinName analogPin, float compensation);
+    
+    ~LM35Therm();
+    
+    void  getAverageValue();
+    void  setCompensation(float newCompensation);
+    float getTempInC();
+    float getTempInF();    
+        
+};
+
+#endif /* __LM35_H__ */
\ No newline at end of file