Diff: SCI_SENSOR/SCI_SENSOR.cpp

Revision:

0:852fb667f2d6

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SCI_SENSOR/SCI_SENSOR.cpp	Tue Dec 01 14:28:25 2020 +0000
@@ -0,0 +1,33 @@
+#include "SCI_SENSOR.h"
+ 
+LM19::LM19(PinName in1): _in1(in1)
+{
+    c1 = -1481.96;
+    c2 = 2.1962*1000000.000;
+    c3 = 1.8636;
+    c4 = 3.88/1000000.000;
+}
+ 
+float LM19::temp()
+{
+    float volt=_in1.read()*3.3;
+    float T=c1+sqrt(c2 + (c3-volt)/c4);
+    return T;
+}
+ 
+PhotoCell::PhotoCell(PinName in1): _in1(in1)
+{
+    Rs = 10000.00;
+}
+ 
+float PhotoCell::light()
+{
+    float vlight=_in1.read()*3.3;
+    //convert voltage into resistance
+    //convert resistance into light
+    float A =-2;
+    float B = 3.8;
+    float R = (3.3*Rs/vlight - Rs)/1000.00;
+    float lux = pow(10, A*log10(R)+B);
+    return lux;
+}
\ No newline at end of file