Revision 0:3a237f51291d, committed 2013-05-24

Comitter:

robt

Date:

Fri May 24 21:48:08 2013 +0000

Commit message:

by Rob Toulson and Tim Wilmshurst from textbook "Fast and Effective Embedded Systems Design: Applying the ARM mbed"

Changed in this revision

diff -r 000000000000 -r 3a237f51291d main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri May 24 21:48:08 2013 +0000
@@ -0,0 +1,35 @@
+/* Program Example 9.5: Tests Timer duration, displaying current time values to terminal
+                                                                     */ 
+#include "mbed.h"
+
+Timer t;
+float s=0;                              //seconds cumulative count
+float m=0;             //minutes cumulative count
+DigitalOut diag (LED1);
+Serial pc(USBTX, USBRX);
+
+int main() {
+  pc.printf("\r\nTimer Duration Test\n\r");
+  pc.printf("-------------------\n\n\r");
+  t.reset();            //reset Timer
+  t.start();            // start Timer
+  while(1){
+    if (t.read()>=(s+1)){   //has Timer passed next whole second?
+      diag = 1;             //If yes, flash LED and print a message
+      wait (0.05);
+      diag = 0;
+      s++ ;
+      //print the number of seconds exceeding whole minutes
+      pc.printf("%1.0f seconds\r\n",(s-60*(m-1)));   
+    }
+    if (t.read()>=60*m){
+      printf("%1.0f minutes \n\r",m);   
+      m++ ;
+    }
+    if (t.read()<s){     //test for overflow
+      pc.printf("\r\nTimer has overflowed!\n\r");
+      for(;;){}         //lock into an endless loop doing nothing
+    }
+  }            //end of while
+}
+

diff -r 000000000000 -r 3a237f51291d mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Fri May 24 21:48:08 2013 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/b3110cd2dd17
\ No newline at end of file