jim hamblen / Mbed 2 deprecated LM61

Analog Temperature Sensor Demo. See http://mbed.org/users/4180_1/notebook/lm61-analog-temperature-sensor/

Dependencies:   mbed

main.cpp@0:e035f4506cd7, 2012-08-17 (annotated)

Committer:
4180_1
Date:
Fri Aug 17 15:48:22 2012 +0000
Revision:
0:e035f4506cd7
ver 1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
4180_1 0:e035f4506cd7 1 #include "mbed.h"
4180_1 0:e035f4506cd7 2
4180_1 0:e035f4506cd7 3 //Print temperature from LM61 analog temperature sensor
4180_1 0:e035f4506cd7 4
4180_1 0:e035f4506cd7 5 //set p15 to analog input to read LM61 sensor's voltage output
4180_1 0:e035f4506cd7 6 AnalogIn LM61(p15);
4180_1 0:e035f4506cd7 7
4180_1 0:e035f4506cd7 8 //also setting unused analog input pins to digital outputs reduces A/D noise a bit
4180_1 0:e035f4506cd7 9 //see http://mbed.org/users/chris/notebook/Getting-best-ADC-performance/
4180_1 0:e035f4506cd7 10 DigitalOut P16(p16);
4180_1 0:e035f4506cd7 11 DigitalOut P17(p17);
4180_1 0:e035f4506cd7 12 DigitalOut P18(p18);
4180_1 0:e035f4506cd7 13 DigitalOut P19(p19);
4180_1 0:e035f4506cd7 14 DigitalOut P20(p20);
4180_1 0:e035f4506cd7 15
4180_1 0:e035f4506cd7 16 int main()
4180_1 0:e035f4506cd7 17 {
4180_1 0:e035f4506cd7 18 float tempC, tempF;
4180_1 0:e035f4506cd7 19
4180_1 0:e035f4506cd7 20 while(1) {
4180_1 0:e035f4506cd7 21 //conversion to degrees C - from sensor output voltage per LM61 data sheet
4180_1 0:e035f4506cd7 22 tempC = ((LM61*3.3)-0.600)*100.0;
4180_1 0:e035f4506cd7 23 //convert to degrees F
4180_1 0:e035f4506cd7 24 tempF = (9.0*tempC)/5.0 + 32.0;
4180_1 0:e035f4506cd7 25 //print current temp
4180_1 0:e035f4506cd7 26 printf("%5.2F C %5.2F F \n\r", tempC, tempF);
4180_1 0:e035f4506cd7 27 wait(.5);
4180_1 0:e035f4506cd7 28 }
4180_1 0:e035f4506cd7 29 }