HP 68302 Manual de usuario

User’s Guide

Real-Time C Debugger for

68302

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Printing History

New editions are complete revisions of the manual. The date on the title

page changes only when a new edition is published.

A software code may be printed before the date; this indicates the version

level of the software product at the time the manual was issued. Many

product updates and fixes do not require manual changes, and manual

corrections may be done without accompanying product changes. Therefore,

do not expect a one-to-one correspondence between product updates and

manual revisions.

Edition 1

Edition 2

Edition 3

Edition 4

B3621-97000, August 1993

B3621-97001, April 1994

B3621-97002, June 1995

B3621-97003, August 1995

Safety, Certification and Warranty

Safety and certification and warranty information can be found at the end of

this manual on the pages before the back cover.

Real-Time C Debugger — Overview

The Real-Time C Debugger is an MS Windows application that lets you debug

C language programs for embedded microprocessor systems.

The debugger controls HP 64700 emulators and analyzers either on the local

area network (LAN) or connected to a personal computer with an RS-232C

interface or the HP 64037 RS-422 interface. It takes full advantage of the

emulator’s real-time capabilities to allow effective debug of C programs while

running in real-time.

The debugger is an MS Windows application

•You can display different types of debugger information in different

windows, just as you display other windows in MS Windows applications.

•You can complete a wide variety of debug-related tasks without exiting

the debugger. You can, for example, edit files or compile your programs

without exiting the debugger.

•You can cut text from the debugger windows to the clipboard, and

clipboard contents may be pasted into other windows or dialog boxes.

The debugger communicates at high speeds

•You can use the HP 64700 LAN connection or the RS-422 connection for

high-speed data transfer (including program download). These

connections give you an efficient debugging environment.

You can debug programs in C context

•You can display C language source files (optionally with intermixed

assembly language code).

•You can display program symbols.

•You can display the stack backtrace.

•You can display and edit the contents of program variables.

•You can step through programs, either by source lines or assembly

language instructions.

•You can step over functions.

•You can run programs until the current function returns.

•You can run programs up to a particular source line or assembly language

instruction.

•You can set breakpoints in the program and define macros (which are

collections of debugger commands) that execute when the breakpoint is

hit. Break macros provide for effective debugging without repeated

command entry.

You can display and modify processor resources

•You can display and edit the contents of memory locations in

hexadecimal or as C variables.

•You can display and edit the contents of microprocessor registers

including on-chip peripheral registers.

•You can display and modify individual bits and fields of bit-oriented

registers.

You can trace program execution

•You can trace control flow at the C function level.

•You can trace the callers of a function.

•You can trace control flow within a function at the C statement level.

•You can trace all C statements that access a variable.

•You can trace before, and break program execution on, a C variable being

set to a specified value.

•You can make custom trace specifications.

You can debug your program while it runs continuously at full speed

•You can configure the debugger to prevent it from automatically

initiating any action that may interrupt user program execution. This

ensures that the user program executes in real time, so you can debug

your design while it runs in a real-world operating mode.

•You can inspect and modify C variables and data structures without

interrupting execution.

•You can set and clear breakpoints without interrupting execution.

•You can perform all logic analysis functions, observing C program and

variable activity, without interrupting program execution.

In This Book

This book documents the Real-Time C Debugger for 68302. It is organized

into five parts whose chapters are described below.

Part 1. Quick Start Guide

Chapter 1 quickly shows you how to use the debugger.

Part 2. User’s Guide

Chapter 2 shows you how to use the debugger interface.

Chapter 3 shows you how to configure the emulator.

Chapter 4 shows you how to plug the emulator into target systems.

Chapter 5 shows how to perform the tasks that you can use to debug

programs.

Part 3. Reference

Chapter 6 contains a summary of the debugger commands as they are

used in command files and break macros.

Chapter 7 describes the format for expressions used in commands.

Chapter 8 describes commands that appear in the menu bar.

Chapter 9 describes commands that appear in debugger window control

menus.

Chapter 10 describes commands that appear in popup menus.

Chapter 11 describes commands that are only available in command files

and break macros.

Chapter 12 describes error messages and provides recovery information.

Part 4. Concept Guide

Chapter 13 contains conceptual (and more detailed) information on

various topics.

Part 5. Installation Guide

Chapter 14 shows you how to install the debugger.

Chapter 15 shows you how to install or update HP 64700 firmware.

Contents

Part 1 Quick Start Guide

1 Getting Started

Step 1. Start the debugger 25

Step 2. Adjust the fonts and window size 26

Step 3. Set the reset value for the supervisor stack pointer 27

Step 4. Map memory for the demo program 29

Step 5. Load the demo program 31

Step 6. Display the source file 32

Step 7. Set a breakpoint 33

Step 8. Run the demo program 34

Step 9. Delete the breakpoint 35

Step 10. Single-step one line 36

Step 11. Single-step 10 lines 37

Step 12. Display a variable 38

Step 13. Edit a variable 39

Step 14. Monitor a variable in the WatchPoint window 40

Step 15. Run until return from current function 41

Step 16. Step over a function 42

Step 17. Run the program to a specified line 43

Step 18. Display register contents 44

Step 19. Trace function flow 46

Step 20. Trace a function’s callers 47

Step 21. Trace access to a variable 49

Step 22. Exit the debugger 50

Part 2 User’s Guide

2 Using the Debugger Interface

How the Debugger Uses the Clipboard 55

Debugger Function Key Definitions 56

Starting and Exiting the Debugger 57

To start the debugger 57

To exit the debugger 58

To create an icon for a different emulator 58

Working with Debugger Windows 60

To open debugger windows 60

To copy window contents to the list file 61

To change the list file destination 61

To change the debugger window fonts 62

To set tab stops in the Source window 62

To set colors in the Source window 63

Using Command Files 64

To create a command file 64

To execute a command file 65

To create buttons that execute command files 66

Contents

3 Configuring the Emulator

Setting the Hardware Options 69

To select the emulator clock source 70

To enable or disable the target BR and BGACK signals 70

To enable or disable the target BERR signal 71

To enable or disable target DTACK for emulation memory accesses 72

To enable or disable target system interrupts 73

To enable or disable break on writes to ROM 73

To specify the TRAP instruction for breakpoints 74

To select the data bus width 74

To specify the target memory access size 75

To select internal or external cycle termination for CS0-3 75

To select /IACK7 pin operation 76

To specify tracing of DMA cycles 76

To select the normal or dedicated interrupt mode 77

To select level or edge sensitivity for /IRQ7 78

Mapping Memory 79

To map memory 79

Selecting the Type of Monitor 82

To select the background monitor 83

To select the foreground monitor 84

Setting Up the BNC Port 86

To output the trigger signal on the BNC port 86

To receive an arm condition input on the BNC port 86

Saving and Loading Configurations 87

To save the current emulator configuration 87

To load an emulator configuration 88

Setting the Real-Time Options 89

To allow or deny monitor intrusion 90

To turn polling ON or OFF 91

Contents

4 Plugging the Emulator into Target Systems

Connecting the Emulator Probe 95

To plug-in the emulator probe 95

Configuring the Emulator for In-Circuit Operation 98

Step 1. Understand the important concepts 98

Step 2. Set up your chip-selects 100

Step 3. Reprogram chip-select base addresses 102

Step 4. Know your interrupt mode 105

Step 5. Decide whether to use the foreground monitor 107

Step 6. Set up the emulator for the foreground monitor 108

Step 7. If you use the 68302 built-in DRAM refresh 112

Step 8. Set up the DTACK signals 113

Step 9. If emulator status shows HALTED 114

Step 10. Choose the correct target memory access size 116

Step 11. Check your DTACK pullup resistor! 117

If you have problems 119

5 Debugging Programs

Loading and Displaying Programs 125

To load user programs 125

To display source code only 126

To display source code mixed with assembly instructions 126

To display source files by their names 127

To specify source file directories 128

To search for function names in the source files 129

To search for addresses in the source files 129

To search for strings in the source files 130

Contents

Tabla de contenidos

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