Maxim Integrated / ds3231

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Dependents:   ard2pmod DS3231demo DS3231demo_COM_Port_Output MAXREFDES99_RTC_Display ... more

Diff: ds3231.cpp

Revision:
7:0551d7e7c13f
Parent:
6:e8850ad15893
Child:
10:3b55ed3f71d3
--- a/ds3231.cpp	Sat Nov 29 20:22:12 2014 +0000
+++ b/ds3231.cpp	Mon Dec 01 20:31:03 2014 +0000
@@ -128,7 +128,7 @@
     }
     data_length++;
     
-    //Test for good data.
+    //Make sure data is within range.  
     if((time.seconds > 59) || (time.minutes > 59) || (time.hours > max_hour))
     {
         return(1);
@@ -174,8 +174,18 @@
     data[data_length++] = uchar_2_bcd(calendar.month);
     data[data_length++] = uchar_2_bcd(calendar.year);
 
-    //users responsibility to make sure calendar is logical
-    return(write(w_adrs,(const char*) data, data_length));
+    //Make sure data is within range.  
+    if(((calendar.day < 1) || (calendar.day > 7)) || 
+       ((calendar.date < 1) || (calendar.date > 31)) || 
+       ((calendar.month < 1) || (calendar.month > 12)) || 
+       (calendar.year > 99))
+    {
+        return(1);
+    }
+    else
+    {
+        return(write(w_adrs,(const char*) data, data_length));
+    }
 }
 
 
@@ -320,8 +330,10 @@
         mask_var = 0;
     }  
     
-    //Test for good data.
-    if((alarm.seconds > 59) || (alarm.minutes > 59) || (alarm.hours > max_hour) || (alarm.day > 7) || (alarm.date > 31))
+    //Make sure data is within range.
+    if((alarm.seconds > 59) || (alarm.minutes > 59) || (alarm.hours > max_hour) || 
+       ((alarm.day < 1) || (alarm.day > 7)) || 
+       ((alarm.date < 1) || (alarm.date > 31)))
     {
         return(1);
     }