Microchip Technology MPLAB ICE, Руководство пользователя

Страница: 109 / 192


2001 Microchip Technology Inc. DS51159B-page 109
Advanced Features
6.3.4.5 Filter Trace
Figure 6.8 shows the Filter tab of the Complex Trigger Settings dialog for
Time Between Events selection. This event selection is used in conjuction
with the trace memory window.
1. Select Filter Trace to specify the events that will be captured by the trace
memory window.
2. To select sequential events to proceed the trace, click on a tab to enter
information about an event (Event 1, Event 2, Event 3).
3. To perform a continuous trace, click on Infinite Events (Filter).
Figure 6.8: Complex Trigger - Filter Trace Selection
Filter Trace is used to capture only the execution of certain events in the trace
buffer. Filtered traces allow you to make more efficient use of trace memory.
You can focus in on sections of code and collect only those, or you can select
to not collect delay loops or other repeated sections of code that are not of
interest
Up to three qualifying events can be specified to occur sequentially before
starting to collect the specified events. The Pass Count field on trigger event
is changed to Captured Events, indicating how many of these events to
record.
To perform a continuous filter trace, check the Infinite Events checkbox.
Infinite Events is a special condition of capturing a filtered trace. As the trace
buffer gets full, old data is discarded and new data is read First In, First Out
(FIFO). This is useful in some special cases;
1. Capturing filtered events up until a user halt. You may wish to see the
data collected up until the system was manually halted.
1
2
3