User manual

MPLAB

REAL ICE

™

IN-CIRCUIT EMULATOR

Chapter 7. Debug for 8- and 16-Bit Devices

7.1 INTRODUCTION

The following debug functions are specific to 8- and 16-bit devices.

• Data Capture and Runtime Watches

•Trace

7.2 DATA CAPTURE AND RUNTIME WATCHES

Data capture provides streaming data from a device to the following:

• Data Monitoring and Control Interface (DMCI) – Tools menu

A runtime watch provides updating of a variable in the following windows during

program execution instead of on halt:

• Watch – View menu

• File Register – View menu

• Special Function Register (SFR) – View menu

Data captures and runtime watches use the same resource. Therefore, setting one or

both uses the resource for the selected symbol.

To set up data captures and/or runtime watches:

1. Select View>Watch

to open the Watch window to set up data capture and/or runt-

ime watches for specific data addresses. See Section 11.3.9 “Watch Window -

Data Capture/Runtime Watch” for more information.

2. Select Debugger>Settings

and click the Clock tab. For data capture and trace,

the emulator needs to know the instruction cycle speed. (See

Section 11.5.6 “Settings Dialog, Clock Tab” for more information.) Enter your

information here.

3. Rebuild the project (Project>Build All

) and reprogram the target device

(Debugger>Program

4. Run the program. View the data in a DMCI window or watch variable values

change in an MPLAB IDE window.

7.3 TRACE

This section will discuss the types of available trace for 8- and 16-bit devices and how

to use them. See Section 11.3.11 “Trace Window” for information on the trace

window.

• Requirements for Trace

• How Trace Works

• Types of Trace

• Setting Up the Project for Trace

• Setting Up Trace in MPLAB IDE

• Running Trace

• Tracing Tips

• Disabling Trace