Diff: src/adc.cpp

Revision:

42:3ae73b61f657

Child:

52:2b3b194144da

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/adc.cpp	Sat Mar 09 21:01:45 2019 +0000
@@ -0,0 +1,136 @@
+//-------------------------------------------------------------------------------
+// 
+//  Treehouse Designs Inc.
+//  Colorado Springs, Colorado
+// 
+//  Copyright (c) 2016 by Treehouse Designs Inc. 
+//  Copyright (c) 2018 by Agility Power Systems Inc. 
+// 
+//  This code is the property of Treehouse Designs, Inc. (Treehouse) and
+//  Agility Power Systems Inc. (Agility) and may not be redistributed
+//  in any form without prior written permission from 
+//  both copyright holders, Treehouse and Agility.
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+// 
+//   
+//-------------------------------------------------------------------------------
+// 
+//  REVISION HISTORY:
+//  
+//   $Author: $
+//   $Rev: $
+//   $Date: $
+//   $URL: $
+// 
+//-------------------------------------------------------------------------------
+
+#include "mbed.h"
+#include "adc_defs.h"
+#include "adc.h"
+#include "all_io.h"
+
+void initADC(void){
+    
+    //Auto-zero current values
+    struct adcValues adcVals = getADCresults();
+    
+    CURRENT_12_OFFSET = adcVals.i12;
+    
+}
+
+/*******************************************************************************
+ getADCresults
+*******************************************************************************/
+struct adcValues getADCresults(void){
+    
+    unsigned int v48x = 0; 
+    unsigned int v12x = 0;
+    unsigned int i12x = 0;
+    
+    struct adcValues avals;
+    unsigned int loopCounter = LOOP_COUNTER;
+    
+    for(unsigned int i=0;i<loopCounter;i++){
+        v48x = v48x + VIN48.read_u16();
+        v12x = v12x + VIN12.read_u16();
+        i12x = i12x + IIN12.read_u16();
+    }
+    avals.v48 = v48x/loopCounter; 
+    avals.v12 = v12x/loopCounter;
+    avals.i12 = i12x/loopCounter;
+    
+    return avals;
+}
+
+/*******************************************************************************
+ getADCvolts
+*******************************************************************************/
+struct adcValues getADCvolts(void){
+    
+    unsigned int v48x = 0; 
+    unsigned int v12x = 0;
+    
+    struct adcValues avals;
+    
+    for(unsigned int i=0;i<100;i++){
+        v48x = v48x + VIN48.read_u16();
+        v12x = v12x + VIN12.read_u16();
+    }
+    avals.v48 = v48x/100; 
+    avals.v12 = v12x/100;
+    
+    return avals;
+}
+
+/*******************************************************************************
+ getADCamps
+*******************************************************************************/
+struct adcValues getADCamps(void){
+    
+    unsigned int i12x = 0;
+    
+    struct adcValues avals;
+    
+    for(unsigned int i=0;i<100;i++){
+        i12x = i12x + IIN12.read_u16();
+    }
+    avals.i12 = i12x/100;
+    
+    return avals;
+}
+
+/*******************************************************************************
+ calcDisplayValues
+*******************************************************************************/
+struct displayValues calcDisplayValues(struct adcValues avals){
+    
+    struct displayValues dvals;
+    
+    if(!raw){
+        dvals.v48f = VOLTAGE_48_FACTOR*avals.v48;
+        dvals.v12f = VOLTAGE_12_FACTOR*avals.v12;
+        
+        // The adc results are linear above CURRENT_12_DIV_THRESH5. Only apply a linear correction to it above that threshold.
+        // The multiple correction factors below CURRENT_12_DIV_THRESH5 linearize the curve below CURRENT_12_DIV_THRESH5.
+        if(abs((avals.i12-CURRENT_12_OFFSET)) > CURRENT_12_DIV_THRESH5){
+            dvals.i12f = (avals.i12-CURRENT_12_OFFSET)/CURRENT_12_DIV_FACTOR5;
+        }else if(abs((avals.i12-CURRENT_12_OFFSET)) > CURRENT_12_DIV_THRESH4){
+            dvals.i12f = (avals.i12-CURRENT_12_OFFSET)/CURRENT_12_DIV_FACTOR4;
+        }else if(abs((avals.i12-CURRENT_12_OFFSET)) > CURRENT_12_DIV_THRESH3){
+            dvals.i12f = (avals.i12-CURRENT_12_OFFSET)/CURRENT_12_DIV_FACTOR3;
+        }else if(abs((avals.i12-CURRENT_12_OFFSET)) > CURRENT_12_DIV_THRESH2){
+            dvals.i12f = (avals.i12-CURRENT_12_OFFSET)/CURRENT_12_DIV_FACTOR2;
+        }else if(abs((avals.i12-CURRENT_12_OFFSET)) > CURRENT_12_DIV_THRESH1){
+            dvals.i12f = (avals.i12-CURRENT_12_OFFSET)/CURRENT_12_DIV_FACTOR1;
+        }else{
+            dvals.i12f = (avals.i12-CURRENT_12_OFFSET)/CURRENT_12_DIV_FACTOR0;
+        }
+    }else{
+        dvals.v48f = 1.0*avals.v48;
+        dvals.v12f = 1.0*avals.v12;
+        dvals.i12f = 1.0*avals.i12;
+    }
+    return dvals;
+}
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