Diff: main.cpp

Revision:

0:81acb52fed21

Child:

1:0e2956eaae94

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Apr 30 10:31:45 2015 +0000
@@ -0,0 +1,104 @@
+/**
+ * Demonstrates how to use the Clock library
+ * 
+ * Note: It's a soft Real Time Clock. No external hardware is needed.
+ * 
+ */
+ 
+#include "mbed.h"
+#include "Clock.h"
+
+Serial serial(USBTX, USBRX);
+
+
+Clock rtc;    // Create Clock instance (set to 00:00:00 January 1, 1970)
+
+// Create some alarm times
+time_t  alarm1 = Clock::asTime(2015, 3, 24, 11, 36, 15);  // year, month, day of month, hour, minute, second
+time_t  alarm2 = Clock::asTime(2015, 3, 24, 11, 37, 30);  // year, month, day of month, hour, minute, second
+
+// Create flags to support performing time consuming tasks in main() (in case you have such tasks)
+bool    minute_tick_flag = false;
+
+/**
+ * @brief   Clock tick event handler (called once a second)
+ * @note    Make sure that it takes less than 1 second to execute
+ *          this function. Otherwise the rtc will fall behind!
+ *          One technique is to set some flags here and
+ *          then test them in the while loop of main().
+ *          See minute_tick_flag.
+ * @param
+ * @retval
+ */
+void onRtcTick(void) {
+    serial.printf("==================================================\r\n");
+//  time_t time = time(NULL);    // you can call C time function if you like
+    time_t time = rtc.time();    // or rtc equivalent
+    serial.printf("Time as seconds since January 1, 1970 = %d\r\n", time);
+    serial.printf("Time as a basic string = %s\r\n", ctime(&time));
+
+    // You can use also custom format.
+    char buffer[32];
+    strftime(buffer, 32, "%I:%M %p", localtime(&time));
+    serial.printf("Time as a custom formatted string = %s\r\n", buffer);
+    // Or design your own:
+    serial.printf("Date:  %.4d-%.2d-%.2d\r\n", rtc.year(), rtc.mon(), rtc.mday());
+    serial.printf("Time:  %.2d:%.2d:%.2d\r\n", rtc.hour(), rtc.min(), rtc.sec());
+
+    // But if it takes too much time (more than 1s) to execute this Interrupt Service Routine
+    // then the RTC will fall behind!
+    // That's why we shall keep this routine as short as possible.
+    // For time consuming tasks we better set flags here and after testing them in the main()
+    // perform the task there. For an example have a look at the minute_tick_flag.
+
+    //
+    // Execute periodical tasks
+    //
+    if(rtc.sec() % 10 == 0) {
+        serial.printf("\r\n  Called each 10 seconds\r\n\r\n");
+    }
+    
+    if(rtc.sec() == 0) {
+        serial.printf("\r\n  Called each minute.\r\n\r\n");
+        
+        if(rtc.min() % 5 == 0)
+            serial.printf("\r\n  Called each 5 minutes\r\n");
+
+        if(rtc.min() == 0)
+            serial.printf("\r\n  Called each hour\r\n");
+            
+        if(rtc.hour() == 0)
+            serial.printf("\r\n  Called at midnight\r\n");
+            
+        minute_tick_flag = true;   // set the flag here (to be tested and reset in main())      
+    }
+
+    //
+    // Trigger alarms
+    //
+    if(rtc.time() == alarm1) {
+        serial.printf("\r\n  Alarm1 triggered!\r\n\r\n");
+    }
+
+    if(rtc.time() == alarm2) {
+        serial.printf("\r\n  Alarm2 triggered!\r\n\r\n");
+    }
+}
+
+int main() {
+    rtc.attach(onRtcTick);  // attach a handler function to the rtc tick event
+    
+    //
+    // Set time. For instance 2015, March, 24th, 11 hours, 35 minutes, 45 seconds
+    //
+    rtc.set(2015, 3, 24, 11, 35, 45);      // year, month (1 stands for Jan etc.), day of month, hour, minute, second
+
+    while (true) {
+        if(minute_tick_flag == true) {
+            minute_tick_flag = false;  // clear the flag for next use
+            // Perform time consuming tasks at defined times!
+            serial.printf("Performing some time consuming tasks in the main() ...\r\n\r\n");
+            // ...
+        }
+    }
+}