µVISION DEBUGGER: Halting Execution in a Signal Function

Information in this article applies to:

• µVision Version 2.06

QUESTION

I'm writing a lot of signal and user functions for the µVision Debugger. 

Is there a way for my functions to stop program execution in the Debugger?

ANSWER

Yes. The System Variable _break_ allows you to do just that. When you set _break_ to a non-zero value, the µVision Debugger halts target program execution. For example:

signal void sigfunc (void) {
while (1) {
  twatch (10000);  /* Delay for 10,000 ticks */
  _break_ = 1;     /* Halt program execution */
  }
}

This function halts program execution every 10,000 cycles.

Last Reviewed: Wednesday, January 27, 2021