µVISION DEBUGGER: FILL MEMORY WITH CONSTANT BEFORE LOAD

Information in this article applies to:

• µVision Version 2 and Later

QUESTION

I need the code space filled with 0xFF before I load code from a HEX file. Is there a way to do this?

I have the following code in an assembler source file.

CSEG        at  1000H
version:    dw  0
crc:        dw  03273H,0F1A6H
date:       dw  042B0H,025D3H
pad:        ds  100
checksum:   dw  00F71H

When the simulator loads the program, the data in pad is all 0x00. When it is loaded into the target it is all 0xFF. Is there a way to fill the memory in the simulator with 0xFF?

ANSWER

Yes. The µVision debugger has several pre-defined debug functions. The function memset allows you to initialize the memory with a constant.

The following steps explain how to preset the memory in the simulator:

• Disable Load Application under Project — Options — Debug.
• Start the debugger and enter the following in the command window:

    memset (C:0, 0x10000, 0xFF)   // fill memory with 0xFF
    LOAD application              // load application code
  
  

You may automate this process by using an INI file that contains these debugger commands. This INI file can be entered under Project — Options — Debug — Initialization File.

MORE INFORMATION

• Refer to Predefined Functions in the µVision User's Guide.

SEE ALSO

• µVision DEBUGGER: SAVING AND LOADING MEMORY AREAS
• µVision DEBUGGER: S:, T:, U:, AND V: USER MEMORY TYPES

FORUM THREADS

The following Discussion Forum threads may provide information related to this topic.

• write command in intialization file (debug)

Last Reviewed: Thursday, January 11, 2007