Diff: main.cpp

Revision:

0:7186208c7c28

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Jun 29 12:26:07 2015 +0000
@@ -0,0 +1,36 @@
+#include "mbed.h"
+/* This program reads output from built-in analogue to digital converter (ADC) */
+
+/* Define some useful constants */
+#define ON 1
+#define OFF 0
+
+/* Create objects for input/output */
+AnalogIn pot_reading(p15); /* ADC input is connected to Pin 15 */
+
+/* Create names for lights */
+DigitalOut light1(LED1); /* Control LED1 using light1 */
+DigitalOut light2(LED2); /* Control LED2 using light2 */
+DigitalOut light3(LED3); /* Control LED3 using light3 */
+DigitalOut light4(LED4); /* Control LED4 using light4 */
+
+/* Main loop */
+int main() 
+{
+    float reading;  /* A variable is needed to store ADC reading */
+    
+    /* Define a while loop that runs forever (or until the MBED is reset) */
+    while(1)
+    {
+        reading=pot_reading; /* store reading from the ADC into variable 'reading' */   
+        if(reading > 0.5) /* Checks whether value stored in 'reading' is greater than 0.5 */
+        {
+            light1=ON; /* light1 is turned on when ADC reading exceeds 0.5 */
+        }
+        else
+        {
+            light1=OFF; /* light1 is turned off when ADC reading is less than 0.5 */
+        }       
+        wait(0.1); /* Pause for 0.1 seconds before taking another reading */
+    }
+}
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