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Dependencies:   mbed

SCI_SENSOR/SCI_SENSOR.cpp@0:852fb667f2d6, 2020-12-01 (annotated)

Committer:
markschwarzer
Date:
Tue Dec 01 14:28:25 2020 +0000
Revision:
0:852fb667f2d6
Start

Who changed what in which revision?

UserRevisionLine numberNew contents of line
markschwarzer 0:852fb667f2d6 1 #include "SCI_SENSOR.h"
markschwarzer 0:852fb667f2d6 2
markschwarzer 0:852fb667f2d6 3 LM19::LM19(PinName in1): _in1(in1)
markschwarzer 0:852fb667f2d6 4 {
markschwarzer 0:852fb667f2d6 5 c1 = -1481.96;
markschwarzer 0:852fb667f2d6 6 c2 = 2.1962*1000000.000;
markschwarzer 0:852fb667f2d6 7 c3 = 1.8636;
markschwarzer 0:852fb667f2d6 8 c4 = 3.88/1000000.000;
markschwarzer 0:852fb667f2d6 9 }
markschwarzer 0:852fb667f2d6 10
markschwarzer 0:852fb667f2d6 11 float LM19::temp()
markschwarzer 0:852fb667f2d6 12 {
markschwarzer 0:852fb667f2d6 13 float volt=_in1.read()*3.3;
markschwarzer 0:852fb667f2d6 14 float T=c1+sqrt(c2 + (c3-volt)/c4);
markschwarzer 0:852fb667f2d6 15 return T;
markschwarzer 0:852fb667f2d6 16 }
markschwarzer 0:852fb667f2d6 17
markschwarzer 0:852fb667f2d6 18 PhotoCell::PhotoCell(PinName in1): _in1(in1)
markschwarzer 0:852fb667f2d6 19 {
markschwarzer 0:852fb667f2d6 20 Rs = 10000.00;
markschwarzer 0:852fb667f2d6 21 }
markschwarzer 0:852fb667f2d6 22
markschwarzer 0:852fb667f2d6 23 float PhotoCell::light()
markschwarzer 0:852fb667f2d6 24 {
markschwarzer 0:852fb667f2d6 25 float vlight=_in1.read()*3.3;
markschwarzer 0:852fb667f2d6 26 //convert voltage into resistance
markschwarzer 0:852fb667f2d6 27 //convert resistance into light
markschwarzer 0:852fb667f2d6 28 float A =-2;
markschwarzer 0:852fb667f2d6 29 float B = 3.8;
markschwarzer 0:852fb667f2d6 30 float R = (3.3*Rs/vlight - Rs)/1000.00;
markschwarzer 0:852fb667f2d6 31 float lux = pow(10, A*log10(R)+B);
markschwarzer 0:852fb667f2d6 32 return lux;
markschwarzer 0:852fb667f2d6 33 }