Diff: main.cpp

Revision:

0:acf4358ae130

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Sep 07 23:18:25 2010 +0000
@@ -0,0 +1,51 @@
+#include "mbed.h"
+
+AnalogIn input(p20); //the range of the analog input goes, from 0 V. to 3.3V.
+// the actual value is represented as a float from 0 to 1.
+
+DigitalOut led1(LED1);
+DigitalOut led2(LED2);
+DigitalOut led3(LED3);
+DigitalOut led4(LED4);
+
+
+
+int main() {
+
+
+    float ain; //ain must be a float, for matching the input.read type.
+
+    while (1) {
+
+        ain=input.read();
+
+        if (ain<0.15) {                  //if analog input <0.15*3.3=0.45V
+            led1=0;
+            led2=0;
+            led3=0;
+            led4=0;
+        } else if ( ain>0.15 && ain<0.3) {  // ain>0.45V and ain< 0.99V
+            led1=1;
+            led2=0;
+            led3=0;
+            led4=0;
+        } else if ( ain>0.3 && ain<0.6) { // ain>0.99V and ain<1.98V
+            led1=1;
+            led2=1;
+            led3=0;
+            led4=0;
+        } else if ( ain>0.6 && ain<0.91) {  //ain>1.98 and ain>3.01V
+            led1=1;
+            led2=1;
+            led3=1;
+            led4=0;
+        } else {                          // more that 3 volts.
+            led1=1;
+            led2=2;
+            led3=1;
+            led4=1;
+        }
+
+
+    }//end while(1)
+}//end main
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