Pre Merge pull request !10 from 独角戏/Develope

Merge pull request !13 from gdzx/N/A

GUI/src/SGUI_ItemsBase.c

@@ -168,6 +168,7 @@ void SGUI_ItemsBase_Repaint(SGUI_SCR_DEV* pstDeviceIF, SGUI_ITEMS_BASE* pstObj)
     SGUI_ITEMS_ITEM*        pstPaintingItem;
     SGUI_CSZSTR             cszItemText;
     SGUI_INT                iItemPosY;
+    void*                   pVisiEndItem;
 
     /*----------------------------------*/
     /* Process                          */
@@ -219,7 +220,8 @@ void SGUI_ItemsBase_Repaint(SGUI_SCR_DEV* pstDeviceIF, SGUI_ITEMS_BASE* pstObj)
             /* Paint all visible item. */
             pstPaintingItem = ITEMS_VISIBLE_START_ITEM(pstObj);
             iItemPosY = pstObj->stLayout.iY + pstObj->iItemPaintOffset;
-            while((pstPaintingItem != ITEMS_VISIBLE_END_ITEM(pstObj)->pstNext) && (NULL != pstPaintingItem))
+            pVisiEndItem = ITEMS_VISIBLE_END_ITEM(pstObj) ? ITEMS_VISIBLE_END_ITEM(pstObj)->pstNext : NULL;
+            while((pstPaintingItem != pVisiEndItem) && (NULL != pstPaintingItem))
             {
                 cszItemText = (NULL == pstPaintingItem->szVariableText) ? (pstPaintingItem->cszLabelText) : (pstPaintingItem->szVariableText);
                 SGUI_Basic_FillRectangleArea(pstDeviceIF, pstObj->stLayout.iX, iItemPosY, pstObj->stLayout.iWidth, ITEM_HEIGHT(pstObj->pstFontRes), pstPaintingItem==ITEMS_SENECT_ITEM(pstObj)?SGUI_COLOR_FRGCLR:SGUI_COLOR_BKGCLR);

HMI/src/HMI_Engine.c

@@ -128,7 +128,12 @@ HMI_ENGINE_RESULT HMI_StartEngine(const void* pstParameters)
                 if(NULL != pstStartScreen->pstActions->Prepare)
                 {
                     eProcessResult = pstStartScreen->pstActions->Prepare(g_pstActivedEngineObject->Interface, pstParameters);
-                    g_pstActivedEngineObject->Interface->fnSyncBuffer();
+
+                    if( (NULL != g_pstActivedEngineObject->Interface) &&
+                        (NULL != g_pstActivedEngineObject->Interface->fnSyncBuffer))
+                    {
+                        g_pstActivedEngineObject->Interface->fnSyncBuffer();
+                    }
                 }
             }
         }