Diff: main.cpp

Revision:

0:34a08ea1e3fc

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Sep 24 15:05:54 2013 +0000
@@ -0,0 +1,29 @@
+#include "mbed.h"
+
+// myled is an object of class DigitalOut. It uses the LED_RED pin
+// in human speech: myled is an output that can be set to zero or one. LED_RED is the pin which is connected to the output
+DigitalOut myled(LED_RED);
+
+// pot is an object of class AnalogIn. It uses the PTB0 pin
+// in human speech: pot is an analog input. You can read the voltage on pin PTB0
+AnalogIn pot(PTB0);
+
+int main() {
+    //declare a variable to store the potmeter value in. myled.read() returns a float.
+    float tijd;
+    //while 1 is unequal to zero. For humans: loop forever
+    while(1) {
+        //read value of potmeter, and store in variable
+        tijd = pot.read();
+        //make pin myled 'high', which means 3.3V. This turns off the LED
+        myled = 1;
+        //Wait takes seconds as argument ( wait(2.5) waits for 2 seconds)
+        //in this case, we're waiting 0.5 seconds if the potmeter is in one end position (analog in has value 1.00)
+        // and we're waiting zero seconds if the potmeter is in the other end position (analog in has value 0.00)
+        wait(0.5*tijd);
+        //make pin myled 'low', which means 0V. This turns on the LED
+        myled = 0;
+        //wait depending on 'tijd', inverse operation of other wait statement, so total time will always be 0.5
+        wait(0.5*(1-tijd));
+    }
+}