Diff: TempBase.cpp

Revision:

0:62f36500cd41

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TempBase.cpp	Thu Sep 14 12:05:02 2017 +0000
@@ -0,0 +1,60 @@
+#include "mbed.h"
+#include "TempBase.h"
+
+
+TempBase::TempBase()
+{
+    ambientTemp = 25.0f;
+    v25         = 760.0f;
+    avgSlope    = 2.5f;
+    vRef        = 3000.0f;
+}
+
+
+TempBase::TempBase(float correction)
+{
+    ambientTemp = 25.0f + correction;
+    v25         = 760.0f;
+    avgSlope    = 2.5f;
+    vRef        = 3000.0f;
+}
+
+// ADC init function, call it 1 time during setup
+void TempBase::Init()
+{
+    hadc1.Instance = ADC1;
+    hadc1.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV4;
+    hadc1.Init.Resolution = ADC_RESOLUTION12b;
+    hadc1.Init.ScanConvMode = DISABLE;
+    hadc1.Init.ContinuousConvMode = DISABLE;
+    hadc1.Init.DiscontinuousConvMode = DISABLE;
+    hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
+    hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
+    hadc1.Init.NbrOfConversion = 1;
+    hadc1.Init.DMAContinuousRequests = DISABLE;
+    hadc1.Init.EOCSelection = EOC_SINGLE_CONV;
+    HAL_ADC_Init(&hadc1);   
+        
+    sConfig.Channel = ADC_CHANNEL_TEMPSENSOR; 
+    sConfig.Rank = 1;
+    sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES;  
+        
+    HAL_ADC_ConfigChannel(&hadc1, &sConfig);
+}
+    
+// returns raw adc value from sensor    
+int TempBase::GetRawTemp()
+{
+    HAL_ADC_Start(&hadc1); // Start conversion
+            
+    // Wait end of conversion and get value
+    if (HAL_ADC_PollForConversion(&hadc1, 10) == HAL_OK) 
+        return HAL_ADC_GetValue(&hadc1);
+    else return -1;
+}
+    
+// takes raw value and convert it to temp    
+float TempBase::ConvertTemp(int value)
+{
+    return (((value * vRef / 0xFFF) - v25) / avgSlope) + ambientTemp;   // formula is from manual
+}
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