Stanley Cohen / mbed_K20D50_temp_blinky

Experiment with K20D50M Temperature sensor BD1020HFV Temperature sensor. Signal routed from J13 to PTC0

Dependencies:   mbed

Fork of mbed_blinky by Mbed

main.cpp@7:7032b113e13b, 2014-10-22 (annotated)

Committer:
scohennm
Date:
Wed Oct 22 01:30:06 2014 +0000
Revision:
7:7032b113e13b
Parent:
4:81cea7a352b0 
Experiment with K20D50M Temperature sensor BD1020HFV Temperature sensor. Sitnal routed from J13 to PTC0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dan 0:7dec7e9ac085 1 #include "mbed.h"
dan 0:7dec7e9ac085 2
scohennm 7:7032b113e13b 3 #define LEDOFF 1
scohennm 7:7032b113e13b 4 #define LEDON 0
scohennm 7:7032b113e13b 5 #define DATATIME 0.4
scohennm 7:7032b113e13b 6 // temp contants
scohennm 7:7032b113e13b 7 #define REFVOLTS 1.29
scohennm 7:7032b113e13b 8 #define REFTEMP 30.0
scohennm 7:7032b113e13b 9 #define VDD 3.3
scohennm 7:7032b113e13b 10 #define TEMPSLOPE -0.0081
scohennm 7:7032b113e13b 11 // Conversion to F
scohennm 7:7032b113e13b 12 #define CZERO 32.0
scohennm 7:7032b113e13b 13 #define CFSLOPE 1.8
scohennm 7:7032b113e13b 14
scohennm 7:7032b113e13b 15
scohennm 7:7032b113e13b 16 Serial pc(USBTX, USBRX);
scohennm 7:7032b113e13b 17 DigitalOut myRled(LED_RED);
scohennm 7:7032b113e13b 18 DigitalOut myGled(LED_GREEN);
scohennm 7:7032b113e13b 19 DigitalOut myBled(LED_BLUE);
scohennm 7:7032b113e13b 20
scohennm 7:7032b113e13b 21 AnalogIn tempSensor(PTC0); // jumper on board J13 left pin to PTC0 J10-2
dan 0:7dec7e9ac085 22
dan 0:7dec7e9ac085 23 int main() {
scohennm 7:7032b113e13b 24 float rawVolts;
scohennm 7:7032b113e13b 25 float rawTemp;
scohennm 7:7032b113e13b 26 float actTemp; //actual temperature
scohennm 7:7032b113e13b 27 float FTemp;
scohennm 7:7032b113e13b 28 int LEDState = LEDON;
scohennm 7:7032b113e13b 29
scohennm 7:7032b113e13b 30 myBled.write(LEDOFF);
scohennm 7:7032b113e13b 31 myGled.write(LEDOFF);
scohennm 7:7032b113e13b 32 while(true) {
scohennm 7:7032b113e13b 33
scohennm 7:7032b113e13b 34 rawTemp = tempSensor.read();//actually percentatd of Vdd volts
scohennm 7:7032b113e13b 35 rawVolts = VDD * rawTemp;
scohennm 7:7032b113e13b 36 actTemp = REFTEMP + (rawVolts - REFVOLTS)/TEMPSLOPE;
scohennm 7:7032b113e13b 37 FTemp = CZERO + actTemp*CFSLOPE;
scohennm 7:7032b113e13b 38 pc.printf("RawTemp = %f Actual Ctemp = %5.2f Ftemp = %5.2f\r\n", rawTemp, actTemp, FTemp);
scohennm 7:7032b113e13b 39
scohennm 7:7032b113e13b 40 myRled.write(LEDState);
scohennm 7:7032b113e13b 41 LEDState = !LEDState;
scohennm 7:7032b113e13b 42 wait(DATATIME);
scohennm 7:7032b113e13b 43
stevep 4:81cea7a352b0 44 }
dan 0:7dec7e9ac085 45 }