From 75a61c57fb0402f777bfa828dd71818a97ed54a4 Mon Sep 17 00:00:00 2001
From: David Lamparter <equinox@diac24.net>
Date: Sun, 1 Apr 2012 00:20:25 +0200
Subject: original dcf77 C code

---
 clock.c | 88 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 clock.c

(limited to 'clock.c')

diff --git a/clock.c b/clock.c
new file mode 100644
index 0000000..e6fba14
--- /dev/null
+++ b/clock.c
@@ -0,0 +1,88 @@
+/************************************************************************/
+/*									*/
+/*			Clock / Calendar				*/
+/*                                                                      */
+/*              Author: Peter Dannegger                                 */
+/*                      danni@specs.de                                  */
+/*                                                                      */
+/************************************************************************/
+
+#include "main.h"
+#include "clock.h"
+#include "max7219.h"
+#include "timebase.h"
+#include "dcf77.h"
+
+struct time data time;
+
+
+void display_date( void )
+{
+  displaymem[7] = time.day / 10;
+  displaymem[6] = time.day % 10 | ATTRIB_DP;
+  displaymem[5] = time.month / 10;
+  displaymem[4] = time.month % 10 | ATTRIB_DP;
+  displaymem[3] = 2;
+  displaymem[2] = 0;
+  displaymem[1] = time.year / 10;
+  displaymem[0] = time.year % 10;
+}
+
+
+void display_time(void)
+{
+  displaymem[7] = time.hour / 10;
+  displaymem[6] = time.hour % 10;
+
+  displaymem[4] = time.minute / 10;
+  displaymem[3] = time.minute % 10;
+
+  displaymem[1] = time.second / 10;
+  displaymem[0] = time.second % 10;
+}
+
+
+u8 code MDAYS[] = {
+    29, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
+
+
+void clock(void)
+{
+  u8 i;
+
+  time.second++;
+  if( time.second == 60 ){
+    time.second = 0;
+    timeflags = 1<<ONE_MINUTE;		// to correct deviation per minute
+    time.minute++;
+    if( time.minute == 60 ){
+      time.minute = 0;
+      time.hour++;
+      switch( time.hour ){
+	case 24:
+	  time.hour = 0;
+	  time.day++;
+	  time.wday++;
+	  if( time.wday == 8 )
+	    time.wday = 1;
+	  i = time.month;
+	  if( i == 2 && (time.year & 3) == 0 )	// leap year
+	    i = 0;
+	  if( LPM(MDAYS+1) == time.day ){
+	    time.day = 1;
+	    time.month++;
+	    if( time.month == 13 ){
+	      time.month = 1;
+	      time.year++;
+	      if( time.year == 100 )
+	        time.year = 0;			// next century
+	    }
+	  }
+	  break;
+//	case 2:
+//	case 3: summertime(); break;
+      }
+    }
+  }
+}
+
-- 
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