CaryCoders / Mbed 2 deprecated SX1276_GPS

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Dependencies:   SX1276Lib AdaFruit_RGBLCD MCP23017 mbed

Fork of AdaFruit_RGBLCD by Justin Howard

Diff: Modules/TimeModule.cpp

Revision:
15:d1eaddb363be
Parent:
13:9641bc42db92
Child:
16:9e1edf28393f
--- a/Modules/TimeModule.cpp	Mon Aug 11 19:13:08 2014 +0000
+++ b/Modules/TimeModule.cpp	Tue Aug 12 04:25:08 2014 +0000
@@ -24,6 +24,7 @@
     : Module(in_cDisplay)
     , m_cRTclock(in_cRTclock)
 {
+    ::memset(&m_sLastTM,0,sizeof(m_sLastTM));
 }
 
 TimeModule::~TimeModule()
@@ -109,7 +110,7 @@
     return k_aCursor[inout_nIndex];
 }
 
-void TimeModule::show()
+void TimeModule::show(bool in_bRefresh)
 {
     tm sTM;
     const char * pUnits = "  ";
@@ -129,6 +130,15 @@
         // If failed get internal time (as at least that's something
         GetTime(sTM);
     }
+    
+    // if refreshing - only update if there's a change
+    if (in_bRefresh)
+    {        
+        if (0 == ::memcmp(&sTM,&m_sLastTM,sizeof(sTM))) return;        
+    }
+    
+    // Ensure internal struct has new TM data
+    ::memcpy(&m_sLastTM,&sTM,sizeof(m_sLastTM));
 
     m_cDisplay.printf ("%02i:%02i:%02i %s   ", sTM.tm_hour, sTM.tm_min, sTM.tm_sec, pUnits);    
 }