TMP sensor

Dependencies:   mbed

Fork of Analog_Temp_2 by Umair Aftab

main.cpp

Committer:
lanmaomao7
Date:
2014-04-09
Revision:
1:348dd46843f4
Parent:
0:ab91d2a9a3bd

File content as of revision 1:348dd46843f4:

#include "mbed.h"
 
//Print temperature from LM61 analog temperature sensor
 
//set p15 to analog input to read LM61 sensor's voltage output
AnalogIn TMP35(PTB0);
 
//also setting unused analog input pins to digital outputs reduces A/D noise a bit
//see http://mbed.org/users/chris/notebook/Getting-best-ADC-performance/
/*
DigitalOut P16(PTB1);
DigitalOut P17(PTB2);
DigitalOut P18(PTB3);
DigitalOut P19(PTC0);
//DigitalOut P20(p20);

/* 
int main()
{
    float tempC, tempF;
    //float val;
 
    while(1) {
        //conversion to degrees C - from sensor output voltage per LM61 data sheet
        tempC = TMP35** 3.3 * 100;
       
        //convert to degrees F
        tempF = (9.0*tempC)/5.0 + 32.0;
        //print current temp
        printf("%5.2F C %5.2F F \n\r", tempC, tempF);
        wait(.5);
    }
}
*/

float TMP_read_temp(){
    float tempC, a[10], avg;
    int i;
    avg=0;
    for(i=0;i<10;i++){
        a[i]=TMP35.read();
        wait(.02);
        }
    for(i=0;i<10;i++){
        avg=avg+(a[i]/10);
        }
    tempC = avg * 3.3 * 100;
    return tempC;
}