Umair Aftab / Mbed 2 deprecated Analog_Temp_2

Analog read for TM36 Temperature sensors.

Dependencies:   mbed

main.cpp@0:ab91d2a9a3bd, 2014-03-07 (annotated)

Committer:
umairaftab
Date:
Fri Mar 07 04:18:43 2014 +0000
Revision:
0:ab91d2a9a3bd
Working ;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
umairaftab 0:ab91d2a9a3bd 1 #include "mbed.h"
umairaftab 0:ab91d2a9a3bd 2
umairaftab 0:ab91d2a9a3bd 3 //Print temperature from LM61 analog temperature sensor
umairaftab 0:ab91d2a9a3bd 4
umairaftab 0:ab91d2a9a3bd 5 //set p15 to analog input to read LM61 sensor's voltage output
umairaftab 0:ab91d2a9a3bd 6 AnalogIn LM61(PTB0);
umairaftab 0:ab91d2a9a3bd 7
umairaftab 0:ab91d2a9a3bd 8 //also setting unused analog input pins to digital outputs reduces A/D noise a bit
umairaftab 0:ab91d2a9a3bd 9 //see http://mbed.org/users/chris/notebook/Getting-best-ADC-performance/
umairaftab 0:ab91d2a9a3bd 10 DigitalOut P16(PTB1);
umairaftab 0:ab91d2a9a3bd 11 DigitalOut P17(PTB2);
umairaftab 0:ab91d2a9a3bd 12 DigitalOut P18(PTB3);
umairaftab 0:ab91d2a9a3bd 13 DigitalOut P19(PTC0);
umairaftab 0:ab91d2a9a3bd 14 //DigitalOut P20(p20);
umairaftab 0:ab91d2a9a3bd 15
umairaftab 0:ab91d2a9a3bd 16 int main()
umairaftab 0:ab91d2a9a3bd 17 {
umairaftab 0:ab91d2a9a3bd 18 float tempC, tempF;
umairaftab 0:ab91d2a9a3bd 19 float val;
umairaftab 0:ab91d2a9a3bd 20
umairaftab 0:ab91d2a9a3bd 21 while(1) {
umairaftab 0:ab91d2a9a3bd 22 //conversion to degrees C - from sensor output voltage per LM61 data sheet
umairaftab 0:ab91d2a9a3bd 23 tempC = ((LM61*3.3)-0.500)*100.0;
umairaftab 0:ab91d2a9a3bd 24 val =
umairaftab 0:ab91d2a9a3bd 25 //convert to degrees F
umairaftab 0:ab91d2a9a3bd 26 tempF = (9.0*tempC)/5.0 + 32.0;
umairaftab 0:ab91d2a9a3bd 27 //print current temp
umairaftab 0:ab91d2a9a3bd 28 printf("%5.2F C %5.2F F \n\r", tempC, tempF);
umairaftab 0:ab91d2a9a3bd 29 wait(.5);
umairaftab 0:ab91d2a9a3bd 30 }
umairaftab 0:ab91d2a9a3bd 31 }