topic CPU HANGS ON GUI_PID_StoreState ONLY WHEN GUI_DRAW PNG IS USED in LPC Microcontrollers https://community.nxp.com/t5/LPC-Microcontrollers/CPU-HANGS-ON-GUI-PID-StoreState-ONLY-WHEN-GUI-DRAW-PNG-IS-USED/m-p/515208#M1068 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by chetansd83 on Mon Jan 11 23:11:36 MST 2016</STRONG><BR /><SPAN>Dear Friends</SPAN><BR /><BR /><SPAN>I am using Embedded Artist board EA4357 with emwin 5.30 M4F library.</SPAN><BR /><BR /><SPAN>All was working fine (Display, Touch etc.)</SPAN><BR /><BR /><SPAN>Hence emwin5.30 doesn't have inbuilt png support, I have downloaded the emwin_png package (emWin_V5.26) from LPCware and included all files in my keil compilor.</SPAN><BR /><BR /><SPAN>Program compiled and run properly (PNG images displayed). </SPAN><BR /><BR /><SPAN>But as i touched the touch screen (anyware in screen) program hangs.</SPAN><BR /><BR /><SPAN>After debugging I came to conclusion that program hangs when&nbsp; </SPAN><STRONG>GUI_PID_StoreState()</STRONG><SPAN> function is called.</SPAN><BR /><BR /><SPAN>I don't understand what is the relation between GUI_PID_StoreState and GUI_Draw_png...??</SPAN><BR /><BR /><SPAN>One more thing I observed, when I touched the touch screen, following error (debug) message is printed on serial port.</SPAN><BR /><BR /><I>GUI_Alloc.c:<BR />Dereferencing free block in GUI_ALLOC_h2p().GUI_Alloc.c:<BR />Block is already unlocked in GUI_ALLOC_UnlockH().</I><BR /><BR /><SPAN>Now I am clueless to solve this.</SPAN><BR /><BR /><SPAN>Please Guide me what can be the reason.</SPAN><BR /><BR /><SPAN>Thanks...</SPAN><BR /><BR /><SPAN>Chetan</SPAN><BR /></BODY></HTML> Wed, 15 Jun 2016 17:15:39 GMT lpcware 2016-06-15T17:15:39Z CPU HANGS ON GUI_PID_StoreState ONLY WHEN GUI_DRAW PNG IS USED https://community.nxp.com/t5/LPC-Microcontrollers/CPU-HANGS-ON-GUI-PID-StoreState-ONLY-WHEN-GUI-DRAW-PNG-IS-USED/m-p/515208#M1068 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by chetansd83 on Mon Jan 11 23:11:36 MST 2016</STRONG><BR /><SPAN>Dear Friends</SPAN><BR /><BR /><SPAN>I am using Embedded Artist board EA4357 with emwin 5.30 M4F library.</SPAN><BR /><BR /><SPAN>All was working fine (Display, Touch etc.)</SPAN><BR /><BR /><SPAN>Hence emwin5.30 doesn't have inbuilt png support, I have downloaded the emwin_png package (emWin_V5.26) from LPCware and included all files in my keil compilor.</SPAN><BR /><BR /><SPAN>Program compiled and run properly (PNG images displayed). </SPAN><BR /><BR /><SPAN>But as i touched the touch screen (anyware in screen) program hangs.</SPAN><BR /><BR /><SPAN>After debugging I came to conclusion that program hangs when&nbsp; </SPAN><STRONG>GUI_PID_StoreState()</STRONG><SPAN> function is called.</SPAN><BR /><BR /><SPAN>I don't understand what is the relation between GUI_PID_StoreState and GUI_Draw_png...??</SPAN><BR /><BR /><SPAN>One more thing I observed, when I touched the touch screen, following error (debug) message is printed on serial port.</SPAN><BR /><BR /><I>GUI_Alloc.c:<BR />Dereferencing free block in GUI_ALLOC_h2p().GUI_Alloc.c:<BR />Block is already unlocked in GUI_ALLOC_UnlockH().</I><BR /><BR /><SPAN>Now I am clueless to solve this.</SPAN><BR /><BR /><SPAN>Please Guide me what can be the reason.</SPAN><BR /><BR /><SPAN>Thanks...</SPAN><BR /><BR /><SPAN>Chetan</SPAN><BR /></BODY></HTML> Wed, 15 Jun 2016 17:15:39 GMT https://community.nxp.com/t5/LPC-Microcontrollers/CPU-HANGS-ON-GUI-PID-StoreState-ONLY-WHEN-GUI-DRAW-PNG-IS-USED/m-p/515208#M1068 lpcware 2016-06-15T17:15:39Z