Bayley Wang
/
priustroller_3
temp repo
Fork of priustroller_2 by
sensors/tempsensors.cpp
- Committer:
- bwang
- Date:
- 2015-03-16
- Revision:
- 35:83cf9564bd0c
- Parent:
- 33:e7b132029bae
File content as of revision 35:83cf9564bd0c:
#include "includes.h" #include "sensors.h" NtcTempSensor::NtcTempSensor(PinName pin, float r_25, float ntc_b, float r_divider) { _in = new AnalogIn(pin); _ntc_b = ntc_b; _ntc_a = r_25 / exp(_ntc_b / 298.0f); _r_divider = r_divider; } float NtcTempSensor::GetTemp() { float v = (float) *_in * 3.3f; float r_n = v * _r_divider / (1.0f + v); return _ntc_b / log (r_n / _ntc_a); }