Diff: main.cpp

Revision:

0:e035f4506cd7

Child:

1:460ecfe930b7

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Aug 17 15:48:22 2012 +0000
@@ -0,0 +1,29 @@
+#include "mbed.h"
+
+//Print temperature from LM61 analog temperature sensor
+
+//set p15 to analog input to read LM61 sensor's voltage output
+AnalogIn LM61(p15);
+
+//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(p16);
+DigitalOut P17(p17);
+DigitalOut P18(p18);
+DigitalOut P19(p19);
+DigitalOut P20(p20);
+
+int main()
+{
+    float tempC, tempF;
+
+    while(1) {
+        //conversion to degrees C - from sensor output voltage per LM61 data sheet
+        tempC = ((LM61*3.3)-0.600)*100.0;
+        //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);
+    }
+}
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