Added TimeCheck example to demonstrate re-use of Process

Author: tigoe

hardware/arduino/avr/libraries/Bridge/examples/TimeCheck/TimeCheck.ino

@@ -0,0 +1,96 @@
+
+/*
+  Time Check 
+ 
+ Gets the time from the linino processor via Bridge
+ then parses out hours, minutes and seconds for the Arduino
+ using an Arduino Yun. 
+ 
+ created  27 May 2013
+ By Tom Igoe 
+ */
+
+
+#include <Process.h>
+
+Process date;                 // process used to get the date
+int hours, minutes, seconds;  // for the results
+int lastSecond = -1;          // need an impossible value for comparison
+
+void setup() {
+  Serial.begin(9600);    // initialize serial
+  Bridge.begin();        // initialize Bridge
+  delay(2000);           // wait 2 seconds
+
+  while(!Serial);                // wait for Serial Monitor to open
+  Serial.println("Time Check");  // Title of sketch
+
+  // run an initial date process. Should return:
+  // hh:mm:ss :
+  if (!date.running())  {
+    date.begin("date");
+    date.addParameter("+%T");
+    date.run();
+  }
+}
+
+void loop() {
+
+  if(lastSecond != seconds) {  // if a second has passed
+    // print the time:
+    if (hours <= 9) Serial.print("0");    // adjust for 0-9
+    Serial.print(hours);    
+    Serial.print(":");
+    if (minutes <= 9) Serial.print("0");  // adjust for 0-9
+    Serial.print(minutes);
+    Serial.print(":");
+    if (seconds <= 9) Serial.print("0");  // adjust for 0-9
+    Serial.println(seconds);
+
+    // restart the date process:
+    if (!date.running())  {
+      date.begin("date");
+      date.addParameter("+%T");
+      date.run();
+    }
+  }
+
+  //if there's a result from the date process, parse it:
+  while (date.available()>0) {
+    // get the result of the date process (should be hh:mm:ss):
+    String timeString = date.readString();    
+
+    // find the colons:
+    int firstColon = timeString.indexOf(":");
+    int secondColon= timeString.lastIndexOf(":");
+
+    // get the substrings for hour, minute second:
+    String hourString = timeString.substring(0, firstColon); 
+    String minString = timeString.substring(firstColon+1, secondColon);
+    String secString = timeString.substring(secondColon+1);
+
+    // convert to ints,saving the previous second:
+    hours = hourString.toInt();
+    minutes = minString.toInt();
+    lastSecond = seconds;          // save to do a time comparison
+    seconds = secString.toInt();
+
+    /*
+    NOTE: If the parseInt() and parseFloar() methods from Stream 
+     were included with Process, this would be simpler:
+     
+     hours = date.parseInt();
+     minutes = date.parseInt();
+     seconds = date.parseInt();
+     
+     */
+  } 
+
+}
+
+
+
+
+
+
+