Microchip Technology MPLAB ICE, User Manual

Page: 114 / 192

MPLAB
®
ICE User’s Guide
DS51159B-page 114

2001 Microchip Technology Inc.
6.3.5.3 Time Between Events Example
An application contains a delay loop. How long is the delay?
For this problem, a Time Between Events trigger is very useful. Suppose the
delay routine is called
Delay
. For debugging purposes, a label
EndDelay
has been added at the address of the delay routine’s return statement. Set the
Start Timer tab to a program memory fetch of address
Delay
, and the Stop
Timer tab to a program memory fetch of address
EndDelay
. Check the
Ignore FNOP Cycles box, and leave both halt checkboxes unchecked. Apply
the trigger, open the trace memory window, then run. After
EndDelay
is
reached, the trace memory window will fill and the largest time stamp value
will be the time between the two events.
Figure 6.12: Specifying the Event that will Start the Timer