LX51: LOCATING PROGRAM OR VARIABLES TO SPECIAL AREAS
Information in this article applies to:
I am writing an IAP loader and would like to locate it in the first 1024 Bytes of my CODE memory. How can I ensure this? I have tried to use wildcards, but this did not work out, since it collidates with interrupt vectors.
The best approch is to locate the program code with a USER CLASS. User classes are an extension of the LX51 Linker/Locater (which is available in the PK51 Professional Developer's Kit).
For example, you can write the following pragma within the C source files that contain the IAP loader program code:
#pragma userclass (code = IAP) // generates CODE_IAP class
This userclass directive places the program code of the module to the memory class CODE_IAP. Now you can separately locate this memory class when you enter it in µVision under Project - Options for Target - LX51 Locate - User Class. To locate the IAP code to the first 1KB of your program section enter here.
CODE_IAP (C:0 - C:0x3FF)
Note that you have to select the Use Extended Linker LX51 under Project - Options for Target - LX51 Locate - User Class.
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Last Reviewed: Thursday, August 17, 2006
of your data.