Debugging an Application Lab

Build/Debug Process

A

start

Load ClosestSample “debug”into MULTI editor

Cut and PasteChanges into

Sample

Build ModifiedSample

Syntax Errs?

CorrectSyntax

y

Connect toTarget Board

Start Debugger

DownloadApplication

Set NeededBreakpoints

B

n

Build/Debug Process (2)

B

RunApplication

(F5)

InjectTestInput

Ran OK?y

LocateProblem

ModifyProblem

Code

A

n

CoveredTest

Cases?

n

BuildROM

Version

y

Re-Test

Release Party

PEEK/POKE Lab

• This is the main builder window

Building the Project

• Once all files are present in project workspace, building is readily done

Building the Project

The Baseline Application

Project Configuration Files (*.bld);Source path,

System include directories, etc.

Included Libraries;ThreadX,

TCP/IP Stack,Drivers,

BSP Integration

C and Assembly

Source Files; Common to all

Projects

Linker File (*.lx);Map the

Software to the Hardware

Memory Map

Perform FinalInitializations

Spawn all BSP Threads

Path to Application Entry Point

BSPROOT.C

Creates Root Thread

tx_thread_create()

netosStartup() applicationStart()

In root.c

Contains main()

“Hello World”

From root.c…

Connecting to Target (1of 3)

• In the Builder, choose Remote > Connect to Target.

Connecting to Target (2 of 3)

• Enter OCDSERV command line.

Connecting to Target (3 of 3)• Two new windows

» IN/OUT –Displays Printf’s» TARGET—can read/write to Memory/CPU

Starting Debugger

• In the Builder select Debug > debug

Debugger Features

• Set Break Points-Software and Hardware

• Step through code

• Examine C-code

• Examine Interlaced Assembly

• Examine values of variables, registers, memory

Debugger Windows

• Interlaced Assembler displayed

• Color enhanced buttons

Download code to Target• Click “play” button or (F5)

Run Program

• Program is Running• Use breakpoints or step through code

“PEEK/POKEing” variables

• Globals– Use “Browse/Globals”

– Double-click the variable of interest to see contents

– Address will appear in command window

– If structure, click to display members, double click to see contents

– Right-click the popup box to change value

• Local variables– Use View/Local Variables

– Works similar to “Browse/Globals” above

• Double click a variable name from debugger C listing to get a watch popup box

“PEEK/POKEing” Memory

• Click “View/Memory”• Enter address of interest in popup box• Select radix using button• Click on a row to change the contents• Explore other options of the popup box

“PEEK/POKEing” registers

• Remember, most registers of interest on Net+ARM are memory-mapped. Consult your Hardware Reference Guide.

• For ARM processor registers:– Use “View/Registers”

– In the popup box, right-click a register number to change it. CAREFUL!