Implement a SD card into HW6

Dependencies:   SDFileSystem mbed

Fork of shomberg_hw_6 by Russell Shomberg

Revision:
13:fa74bf0c3b8d
Parent:
12:ea407dcaff78
Child:
20:fc1690076f87
--- a/OCE360Input.cpp	Thu Oct 25 22:43:36 2018 +0000
+++ b/OCE360Input.cpp	Tue Oct 30 14:08:21 2018 +0000
@@ -22,7 +22,8 @@
 #define TEMP_CALIBRATION_A 0.1
 #define TEMP_CALIBRATION_B 0
 
-
+DigitalIn myswitch(p7);
+AnalogIn Ain(p20);
 
 int switchPosition;
 int sensorVoltage;
@@ -33,9 +34,9 @@
 }
 
 float read_sensor(void){
-    return Ain*VREF*1000;    
+    return Ain*VREF*1000;  // voltage in mV
 }
 
 float convert_mV_to_temp(float sensorVoltage) {
-    return sensorVoltage*TEMP_CALIBRATION_A+TEMP_CALIBRATION_B;
+    return sensorVoltage*TEMP_CALIBRATION_A+TEMP_CALIBRATION_B; //temp in deg C
 }