Microchip Technology MPLAB ICE, User Manual

Page: 154 / 192

MPLAB
®
ICE User’s Guide
DS51159B-page 154

2001 Microchip Technology Inc.
A.4.4 All code executed
Test an application to ensure that all the code is being executed.
See Code Coverage, Section 6.4.
A.4.5 Output not correct
An application has outputs that are not correct. How do you find out what is
going on?
Use the logic probes to trigger on output values and then examine the
executed code in the trace buffer to find the problem. There are two possible
ways to do this: use the eight external inputs (EXT7:EXT0) or use the trigger
in (TRGIN). For more information on logic probes, see Section B.6.
Solution A: External Inputs
To clear all break, trace and trigger points, select Debug>Clear All Points.
Select Debug>Complex Trigger Settings to open the Complex Trigger
Settings dialog.
Figure A.17: Sequential Trigger for Logic Probes
Set up the Complex Trigger Settings dialog for Sequential Trace on Program
Memory. Ignore FNOP Cycles should be checked.
Select Logic Probes and enter an 8-bit value for the trigger. When this value
appears on probes EXT7:EXT0, the trigger will fire. You may enter the value
as binary (ex:
00001111
) or hexidecimal (ex:
0x0F
). The ’
x
’ character means
’don’t care’.