kirthiga annamalai / Mbed 2 deprecated temp

temp

Dependencies:   mbed

Fork of LM61 by kirthiga annamalai

main.cpp@1:460ecfe930b7, 2015-01-14 (annotated)

Committer:
kirthigaannamalai
Date:
Wed Jan 14 06:05:53 2015 +0000
Revision:
1:460ecfe930b7
Parent:
0:e035f4506cd7 
slowdown blink rate

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);
kirthigaannamalai 1:460ecfe930b7 11 DigitalOut myled(LED1);
kirthigaannamalai 1:460ecfe930b7 12 DigitalOut myled2(LED2);
4180_1 0:e035f4506cd7 13
4180_1 0:e035f4506cd7 14 int main()
4180_1 0:e035f4506cd7 15 {
4180_1 0:e035f4506cd7 16 float tempC, tempF;
4180_1 0:e035f4506cd7 17
4180_1 0:e035f4506cd7 18 while(1) {
4180_1 0:e035f4506cd7 19 //conversion to degrees C - from sensor output voltage per LM61 data sheet
4180_1 0:e035f4506cd7 20 tempC = ((LM61*3.3)-0.600)*100.0;
4180_1 0:e035f4506cd7 21 //convert to degrees F
4180_1 0:e035f4506cd7 22 tempF = (9.0*tempC)/5.0 + 32.0;
4180_1 0:e035f4506cd7 23 //print current temp
4180_1 0:e035f4506cd7 24 printf("%5.2F C %5.2F F \n\r", tempC, tempF);
4180_1 0:e035f4506cd7 25 wait(.5);
kirthigaannamalai 1:460ecfe930b7 26 if(P16>29)
kirthigaannamalai 1:460ecfe930b7 27 {
kirthigaannamalai 1:460ecfe930b7 28 myled=1;
kirthigaannamalai 1:460ecfe930b7 29 myled2=0;
kirthigaannamalai 1:460ecfe930b7 30 wait(1.0);
kirthigaannamalai 1:460ecfe930b7 31 }
kirthigaannamalai 1:460ecfe930b7 32 else
kirthigaannamalai 1:460ecfe930b7 33 {
kirthigaannamalai 1:460ecfe930b7 34 myled=0;
kirthigaannamalai 1:460ecfe930b7 35 myled2=1;
kirthigaannamalai 1:460ecfe930b7 36 wait(1.0);
kirthigaannamalai 1:460ecfe930b7 37 }
kirthigaannamalai 1:460ecfe930b7 38 }
4180_1 0:e035f4506cd7 39 }