Diff: main.cpp

Revision:

4:46410fc301ea

Parent:

3:abab0082e271

Child:

5:2b825fae647d

--- a/main.cpp	Thu Jul 02 07:34:56 2015 +0000
+++ b/main.cpp	Mon Jul 06 01:30:22 2015 +0000
@@ -1,26 +1,23 @@
-/* Analog Input Example Program */
+/* Analog Input "Temp36" Temperature Sensor Example Program */
  
 #include "mbed.h"
 
-// Initialize a pins to perform analog input and digital output fucntions
-AnalogIn   ain(A0);     
-DigitalOut myled(LED1);     // on-board LED_RED
+// Initialize a pins to perform analog input fucntions
+AnalogIn   ain(A0); // connect A0(WIZwiki-W7500) to Vout(Temp36)
 
 int main(void)
 {
-    while (1) {
-        // test the voltage on the initialized analog pin
-        //  and if greater than 0.4 * VCC set the digital pin
-        //  to a logic 1 otherwise a logic 0
-        if(ain > 0.4f) {
-            myled = 1;      // Red LED Off
-        } else {
-            myled = 0;      // Red LED On
-        }
+    while (1)
+    {
+        float V = ain.read() * 3.3; // connect Vs(Temp36) to 3.3V(WIZwiki-W7500) 
+        //float V = ain.read() * 5; // connect Vs(Temp36) to 5V(WIZwiki-W7500)
         
-        // print the percentage and normalized values
-        printf("percentage: %3.3f%%\r\n", ain.read()*100.0f);
-        printf("analog value : %3.3f\r\n", ain.read());
+        float tempC = (V-0.5) * 100; // calculate temperature C
+        float tempF = (tempC * 9 / 5) + 32.0; // calculate temperature F
+        
+        printf("tempC value : %5.2f C \r\n", tempC);
+        printf("tempF value : %5.2f F \r\n", tempF);
+        
         wait(1.0);
     }
 }