initialisze xdata and code memory

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Read-Only Author Shahsi Banavara Posted 25-Jan-2002 13:46 GMT Toolset C51	initialisze xdata and code memory Shahsi Banavara Can I get some info on how to initialise the Code memory and data memory 1)Unsigned char xdata temp _at_ 0x8000; 2)unsigned char code temp1_at_0x8000; In the cases mentioned above , how do i initialise 20 bytes of data conitiugously

Read-Only Author Scott deWolski Posted 25-Jan-2002 14:21 GMT Toolset C51	RE: initialisze xdata and code memory Scott deWolski You might want to look at; http://www.keil.com/forum/msgpage.asp?MsgID=4481

Read-Only Author Andrew Neil Posted 25-Jan-2002 15:06 GMT Toolset C51	RE: initialisze xdata and code memory Andrew Neil This is a very frequent topic - just scroll back through the list, or use the 'Search' Any particular reason why you need to initialise specific locations?

Read-Only Author shashi Ramachandra Posted 29-Jan-2002 03:29 GMT Toolset C51	RE: initialisze xdata and code memory shashi Ramachandra Thanks for the reply Well I do not have specific reason , to initialise xdata to specfic memory location. This is for exploring different possibilitis to initialize data , a lookup table for example I have one question below What are the options to be set in the KEIL to generate the Hex code from 0000 location Thanks Regards SHASHI B R

Read-Only Author Andrew Neil Posted 29-Jan-2002 20:42 GMT Toolset C51	RE: initialisze xdata and code memory Andrew Neil "This is for exploring different possibilitis to initialize data" If you're programming in 'C', just leave it to the compiler! "I have one question below" Sounds like a new question - so best to start a new thread with it.

Read-Only Author Norbert Paul Posted 7-Feb-2002 08:00 GMT Toolset C51	RE: initialize xdata Norbert Paul If you really want to hack an initialisation to a fixed memory location, you could compile a file which might say: #pragma SRC unsigned int xdata variable = 0x1234; then look up the ?C_INITSEG-Part of the generated Src-file and copy this into a separate assembly - module, adding: EXTRN XDATA variable I've once tried this and it worked fine, but I never tried it with fixed memory locations. Norbert

Read-Only Author Norbert Paul Posted 7-Feb-2002 08:00 GMT Toolset C51	RE: initialize xdata Norbert Paul If you really want to hack an initialisation to a fixed memory location, you could compile a file which might say: #pragma SRC unsigned int xdata variable = 0x1234; then look up the ?C_INITSEG-Part of the generated Src-file and copy this into a separate assembly - module, adding: EXTRN XDATA(variable) I've once tried this and it worked fine, but I never tried it with fixed memory locations. Norbert

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