User manual

MPLAB

REAL ICE

™

In-Circuit Emulator User’s Guide

5.5 TRACE

This section will discuss the types of available instrumented trace and how to use them.

For information on the trace window, see Section 5.7.10 “Trace Window”.

• Capture Trace

• I/O Port Trace

• Requirements for Trace

• Setting Up the Project for Trace

• Setting Up Trace in MPLAB IDE

• Running Trace

• Disabling Trace

5.5.1 Capture Trace

Capture trace can be used with either standard or high-speed communications, with no

additional connections. This two-wire interface uses the instrumented trace macro

format (see Section 5.5.5 “Setting Up Trace in MPLAB IDE”).

If capture trace is used, then real-time data capture triggers cannot be used because

of hardware constraints. However, breakpoints are still available. To use data capture

triggers, you must disable capture trace (see Section 5.5.7 “Disabling Trace”).

5.5.2 I/O Port Trace

I/O Port trace can be used with either standard or high-speed communications. Trace

clock and data are provided from a device I/O port through the MPLAB REAL ICE in-cir-

cuit emulator logic probe connector. For hardware connections, see Section 2.5.6 “I/O

Port Trace Connections”.

The port interface uses the instrumented trace macro format (see

Section 5.5.5 “Setting Up Trace in MPLAB IDE”).

5.5.3 Requirements for Trace

The following is required to use trace:

• MPLAB IDE v7.43 and above

• MPLAB C30 v2.04 and above

5.5.4 Setting Up the Project for Trace

Refer to Chapter 4. “General Setup” for a discussion of how to set up MPLAB IDE

and an MPLAB IDE project to use the MPLAB REAL ICE in-circuit emulator.

To enable trace:

•Select Project>Build Options>Project

, Trace tab. Click “Enable Instrumented

Trace” and then select the Transport for trace data, i.e., “Capture Trace” for stan-

dard communication transport or “I/O Port” for I/O port data transport. If using I/O

port transport, select the port you will be using from the pull-down list. Click OK.

Note: Instrumented trace is only available when using C code, not assembly.