Discussion Forum

NO_INIT data area

Details	Message
Read-Only Author Dave Cote Posted 31-May-2001 23:49 GMT Toolset C51	NO_INIT data area Dave Cote I am converting from the IAR compiler to Keil and cannot find reference to defining segments like I used to. Specificly I used a seg known as NO_INIT in XDATA for variables I did not want altered on power up. Any help would be great.

Read-Only Author Andrew Neil Posted 4-Jun-2001 22:52 GMT Toolset C51	RE: NO_INIT data area Andrew Neil This is common among many compilers, but I don't think that Keil actually has such a notion? Are you trying to implement some sort of non-volatile memory? It sounds like you've probably already searched the Compiler & Linker manuals for suitable options. The file startup.a51 controls the initial clearing of XDATA, etc - could you modify this to give an uninitialised area, and then use Linker controls to put your non-volatile variables into that area? See Chapter 6, "Advanced Programming Techniques" in the C51 User's Guide

Read-Only Author Dave Cote Posted 5-Jun-2001 15:02 GMT Toolset C51	RE: NO_INIT data area Dave Cote Correct, I am working on getting a non-volatile area defined that does not get initialized on start-up. A place I can drop variables that remain intact. Thanks