Diff: main.cpp

Revision:

0:7c7f4b30d64f

Child:

1:4c0c28cc2b2c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Feb 26 14:52:18 2015 +0000
@@ -0,0 +1,50 @@
+#include "mbed.h"
+#include "stdio.h"
+
+DigitalOut myled(LED1); // Led on board
+DigitalOut clock_pin(D8); //send clock pulse
+DigitalOut serial_out(D7); //serial tx
+Timer t; //timer for controlling the clock and data skew
+int msecs; //clock time needed for data transfer
+int sksecs; //skew time
+int skew_flag; //skew flag for while loop
+
+int main() {
+    
+    //turn on red led to show programming has worked
+    myled = 0;
+    //initialize output pins
+    clock_pin = 0;
+    serial_out = 0;
+    //skew flag
+    skew_flag = 1;
+    
+    //set timers
+    msecs = 10;
+    sksecs = 8;
+    
+    //output a clock pulse and data.
+    while(1)
+    {
+        //start timer for clock
+        t.start();
+        //wait until the timer has reached the set time.
+        while(t.read_ms() < msecs)
+        {
+            //switch data just before clock goes high
+            if(!clock_pin && skew_flag && t.read_ms() > sksecs)
+            {
+                //switch data signal
+                serial_out = !serial_out;
+                skew_flag = 0;
+            }
+        }
+        //stop and reset the timer
+        t.stop();
+        t.reset();
+        //switch clock signal
+        clock_pin = !clock_pin;
+        //reset skew flag
+        skew_flag = 1;
+    }
+}
\ No newline at end of file