FAQ: How do Reset, Reload and Restart differ?

Document created by mue on Apr 13, 2009Last modified by CraigG on Nov 12, 2013
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Q:

How do Reset, Reload and Restart differ?

 

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A:

The three IDDE options "Reset, "Reload" and "Restart", although similar, perform subtly different actions to one another. The descriptions should clarify the behavior of each.

 


Reset - The 'Reset' command restores the target to a known startup state. This involves clearing processor memory, configuring registers to startup values, and setting PC to Reset address.

 


Reload - The 'Reload' command reloads the current program and, by default, Resets the target (configurable in properties - "Reset on Reload"). Note: if a Reset is not also performed, only the program's image is reloaded. Memory that is not overwritten by the program will not be changed.

 


Restart (Removed in 4.5) - The 'Restart' command sets the PC to the Reset address. Unlike a Reset, you do not need to reload the program. The 'Restart' command has different behavior depending on whether you are using it within a Simulator Session, or working on hardware. The behavior is as follows:

 

Simulator Sessions - In simulation, Restart works like Reset in that all registers are reset to their reset values, however unlike a reset the processor memory is not cleared. Thus, C and assembly global variables are not reset to their original values, which in turn means that your program may behave differently after a restart. To reinitialize these values, you should use a 'Reload' to reload the .DXE file.

 


Hardware Sessions
- In EZ-KIT or Emulator sessions, Restart works exactly like Reset, except that only registers with default reset values are affected. All other registers remain unchanged.

 

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This FAQ was generated from the following thread: How do Reset, Reload and Restart differ?

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