topic RAM initalization in Classic/Legacy CodeWarrior https://community.nxp.com/t5/Classic-Legacy-CodeWarrior/RAM-initalization/m-p/204372#M5637 <HTML><HEAD></HEAD><BODY><DIV> </DIV><SPAN>I have external RAM on my system. It is being automaticaly intialized when the system starts up. It is battery backed.</SPAN><BR /><BR /><SPAN>I whish it not to be altered. I are assuming there is a setting to stop this from happening. But where is it.</SPAN><BR /><BR /><SPAN>The memory is decleared as such</SPAN><BR /><BR /><SPAN>c file</SPAN><BR /><SPAN>#pragma DATA_SEG __GPAGE_SEG BATTERY_RAM</SPAN><BR /><SPAN>&nbsp; volatile Prog_Layout&nbsp;&nbsp; Program[MAX_PROGRAMS + 2];</SPAN><BR /><BR /><SPAN>prm file</SPAN><BR /><SPAN>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; BATTERY_RAM&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; INTO&nbsp; NO_INIT&nbsp;&nbsp;&nbsp;&nbsp; 0x200000'G TO 0x3FFFFF'G;&nbsp;&nbsp; // CS1 BatteryRAM;</SPAN><BR /><BR /><SPAN>yet when the system is rebooted it has 64 in every byte.</SPAN><BR /><BR /><BR /><SPAN>anyone got any surgestions.</SPAN><BR /><BR /><BR /><DIV> </DIV></BODY></HTML> Wed, 19 Mar 2008 05:42:54 GMT NZ_Design 2008-03-19T05:42:54Z RAM initalization https://community.nxp.com/t5/Classic-Legacy-CodeWarrior/RAM-initalization/m-p/204372#M5637 <HTML><HEAD></HEAD><BODY><DIV> </DIV><SPAN>I have external RAM on my system. It is being automaticaly intialized when the system starts up. It is battery backed.</SPAN><BR /><BR /><SPAN>I whish it not to be altered. I are assuming there is a setting to stop this from happening. But where is it.</SPAN><BR /><BR /><SPAN>The memory is decleared as such</SPAN><BR /><BR /><SPAN>c file</SPAN><BR /><SPAN>#pragma DATA_SEG __GPAGE_SEG BATTERY_RAM</SPAN><BR /><SPAN>&nbsp; volatile Prog_Layout&nbsp;&nbsp; Program[MAX_PROGRAMS + 2];</SPAN><BR /><BR /><SPAN>prm file</SPAN><BR /><SPAN>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; BATTERY_RAM&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; INTO&nbsp; NO_INIT&nbsp;&nbsp;&nbsp;&nbsp; 0x200000'G TO 0x3FFFFF'G;&nbsp;&nbsp; // CS1 BatteryRAM;</SPAN><BR /><BR /><SPAN>yet when the system is rebooted it has 64 in every byte.</SPAN><BR /><BR /><BR /><SPAN>anyone got any surgestions.</SPAN><BR /><BR /><BR /><DIV> </DIV></BODY></HTML> Wed, 19 Mar 2008 05:42:54 GMT https://community.nxp.com/t5/Classic-Legacy-CodeWarrior/RAM-initalization/m-p/204372#M5637 NZ_Design 2008-03-19T05:42:54Z Re: RAM initalization https://community.nxp.com/t5/Classic-Legacy-CodeWarrior/RAM-initalization/m-p/204373#M5638 <HTML><HEAD></HEAD><BODY>Are you sure it the compiler startup code which inits your RAM?<BR />I would guess it is something else, the NO_INIT should stop the linker from init your data, and also the startup code would 0-init it, and not write 0x40.<BR />So I would guess that something in your battery backed RAM setup is not working properly and look in that direction.<BR /><BR />Daniel<BR /><BR /></BODY></HTML> Wed, 19 Mar 2008 10:42:28 GMT https://community.nxp.com/t5/Classic-Legacy-CodeWarrior/RAM-initalization/m-p/204373#M5638 CompilerGuru 2008-03-19T10:42:28Z