BL51: Locating Individual Segments While Using Start Address

Information in this article applies to:

• BL51 Version 3.70 and Later

PROBLEM

I wish to locate all my functions at 8000H upwards in code memory except for the main function, which I wish to locate at 100H. How do I do this?

RESOLUTION

This may be achieved using the CODE directive for the BL51 Code Banking Linker/Locator. Details of the directive may be found in the "Linking Programs" - "Directives" section of the BL51 Users Guide. The following is an example of calling BL51 using the command line to solve the problem:

BL51 MYPROG.OBJ CODE(8000h, ?PR?MAIN?MYPROG(100h))

This will locate the main function at 100H, and all the other functions and segments from 8000H upwards in code memory.

To set the CODE directive in µVision, first choose BL51 Code Banking Linker... from the Options menu. Click on the Segments tab. In the Code box enter the parameters of the CODE directive. For example:

8000h, ?PR?MAIN?MYPROG(100h)

The command line argument appears in the box at the bottom of the window. Click on the OK button.

MORE INFORMATION

• Refer to Segment Naming Conventions in the Cx51 User's Guide.

SEE ALSO

• C51: Locate a Function at an Absolute Address

Last Reviewed: Thursday, February 25, 2021