Joe Staton / Mbed 2 deprecated max31855Sample

Sample program for the MAX31855. Prints out the temperature read to console.

Dependencies:   MAX31855 mbed

main.cpp@1:6bed4f6f7b35, 2012-10-23 (annotated)

Committer:
Stavlin
Date:
Tue Oct 23 10:55:17 2012 +0000
Revision:
1:6bed4f6f7b35
Parent:
0:c50a2801c243 
Altered to use new fault code setup.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Stavlin 0:c50a2801c243 1 #include "mbed.h"
Stavlin 0:c50a2801c243 2 #include "max31855.h"
Stavlin 0:c50a2801c243 3
Stavlin 0:c50a2801c243 4 DigitalOut myled(LED1);
Stavlin 0:c50a2801c243 5
Stavlin 0:c50a2801c243 6 //----------------------------------------------------------
Stavlin 0:c50a2801c243 7 //SPI Interfaces
Stavlin 0:c50a2801c243 8 SPI testSPI(p11,p12,p13);
Stavlin 0:c50a2801c243 9 //----------------------------------------------------------
Stavlin 0:c50a2801c243 10
Stavlin 0:c50a2801c243 11 //----------------------------------------------------------
Stavlin 0:c50a2801c243 12 //Thermocouples
Stavlin 0:c50a2801c243 13 max31855 max1(testSPI,p21);
Stavlin 0:c50a2801c243 14 //----------------------------------------------------------
Stavlin 0:c50a2801c243 15
Stavlin 0:c50a2801c243 16 int main() {
Stavlin 0:c50a2801c243 17 //Initialise chip (starts internal timer)
Stavlin 0:c50a2801c243 18 max1.initialise();
Stavlin 0:c50a2801c243 19
Stavlin 0:c50a2801c243 20 //Float value to hold temperature returned
Stavlin 0:c50a2801c243 21 float fvalue = 0;
Stavlin 0:c50a2801c243 22
Stavlin 0:c50a2801c243 23 while(1) {
Stavlin 0:c50a2801c243 24 //Check if the chip is ready for a reading to be taken
Stavlin 0:c50a2801c243 25 if (max1.ready()==1){
Stavlin 0:c50a2801c243 26 //Get the reading
Stavlin 0:c50a2801c243 27 fvalue = max1.read_temp();
Stavlin 0:c50a2801c243 28
Stavlin 1:6bed4f6f7b35 29 if (fvalue > 2000){
Stavlin 1:6bed4f6f7b35 30 if(fvalue==2001){
Stavlin 1:6bed4f6f7b35 31 printf("No TC");
Stavlin 1:6bed4f6f7b35 32 }else if(fvalue==2002){
Stavlin 1:6bed4f6f7b35 33 printf("Short to Ground");
Stavlin 1:6bed4f6f7b35 34 }else if(fvalue==2004){
Stavlin 1:6bed4f6f7b35 35 printf("Short to VCC");
Stavlin 1:6bed4f6f7b35 36 }
Stavlin 1:6bed4f6f7b35 37 }else{
Stavlin 1:6bed4f6f7b35 38 printf("Temperature is: %f\n\r", fvalue);
Stavlin 1:6bed4f6f7b35 39 }
Stavlin 1:6bed4f6f7b35 40 }
Stavlin 0:c50a2801c243 41
Stavlin 0:c50a2801c243 42 //Heartbeat signal (not necessary)
Stavlin 0:c50a2801c243 43 myled = !myled;
Stavlin 0:c50a2801c243 44
Stavlin 0:c50a2801c243 45 //Delay is not required, here simply for test program
Stavlin 0:c50a2801c243 46 wait(0.25);
Stavlin 0:c50a2801c243 47 }
Stavlin 0:c50a2801c243 48 }