Lauterbach DsPIC33 Manuale utente

MANUAL

Release 02.2022

dsPIC33 Debugger

dsPIC33 Debugger | 2

dsPIC33 Debugger

TRACE32 Online Help

TRACE32 Directory

TRACE32 Index

TRACE32 Documents ...................................................................................................................... 

ICD In-Circuit Debugger ................................................................................................................ 

Processor Architecture Manuals .............................................................................................. 

dsPIC33 .................................................................................................................................... 

dsPIC33 Debugger ............................................................................................................... 1

History ................................................................................................................................ 4

Warning .............................................................................................................................. 5

Introduction ....................................................................................................................... 6

Brief Overview of Documents for New Users 6

Demo and Start-up Scripts 7

Configuration ..................................................................................................................... 8

System Overview 8

Quick Start ......................................................................................................................... 9

Start a New Debug Session 9

Programming a Productive Application Binary 10

Troubleshooting ................................................................................................................ 12

FAQ ..................................................................................................................................... 13

dsPIC33 Specific Implementations .................................................................................. 14

dsPIC33 Debug Monitor 14

Breakpoints 14

Software Breakpoints 14

On-chip Breakpoints for Instructions 15

On-chip Breakpoints for Data 15

Memory Classes 16

Programming the On-chip FLASH of the dsPIC33 17

Special Hints, Restrictions, and Known Problems 17

Special Hints 17

Restrictions 17

Known Problems 17

CPU specific SYStem Settings ......................................................................................... 18

SYStem.CLockPrescaler Select the prescaler for the debug clock 18

dsPIC33 Debugger | 3

SYStem.CONFIG.state Display target confguration 18

SYStem.CONFIG Configure debugger according to target topology 19

<parameters> describing the “DebugPort” 19

System.CPU Select the used CPU 20

SYStem.LOCK Tristate the debug port 20

SYStem.MemAccess Real-time memory access (non-intrusive) 21

SYStem.Mode Establish the communication with the target 22

SYStem.Option Special setup 23

SYStem.Option.BReakonWDT Enable break on watchdog time-out 23

SYStem.Option.CLockSWitch Enable clock group switch 23

SYStem.Option.ENableWDT Enable watchdog timer 23

SYStem.Option.FastRC Use FRC as debug port clock 24

SYStem.Option.FreezePer Freeze peripherals on break or breakpoint 24

SYStem.Option.IMASKASM Disable interrupts while single stepping 24

SYStem.Option.IMASKHLL Disable interrupts while HLL single stepping 25

SYStem.Option.PARTitionconfig Configure the Flash partitions 25

SYStem.Option.PoWeRSaVe Enable PWRSAV instruction 25

SYStem.state Display SYStem.state window 26

CPU specific TrOnchip Commands .................................................................................27

Target Adaption ................................................................................................................. 28

Probe Cables 28

Connector Type and Pinout 28

dsPIC33 Debugger | 4

dsPIC33 Debugger

Version 09-Mar-2022

History

01-Jan-21 Added support for dsPIC33E family.

04-May-20 Supplemented section “Start a New Debug Session” with description of implemented feature

SYStem.DETECT.CPU.

20-Feb-20 New command: SYStem.Mode Prepare.

New section “Programming a Productive Application Binary”.

dsPIC33 Debugger | 5

Warning

WARNING: To prevent debugger and target from damage it is recommended to connect or

disconnect the debug cable only while the target power is OFF.

Recommendation for the software start:

1. Disconnect the debug cable from the target while the target power is

off.

2. Connect the host system, the TRACE32 hardware and the debug

cable.

3. Power ON the TRACE32 hardware.

4. Start the TRACE32 software to load the debugger firmware.

5. Connect the debug cable to the target.

6. Switch the target power ON.

7. Configure your debugger e.g. via a start-up script.

Power down:

1. Switch off the target power.

2. Disconnect the debug cable from the target.

3. Close the TRACE32 software.

4. Power OFF the TRACE32 hardware.

dsPIC33 Debugger | 6

Introduction

This manual serves as a guideline for debugging dsPIC33C/E cores and describes all processor-specific

TRACE32 settings and features.

Please keep in mind that only the Processor Architecture Manual (the document you are reading at the

moment) is CPU specific, while all other parts of the online help are generic for all CPUs supported by

Lauterbach. So if there are questions related to the CPU, the Processor Architecture Manual should be your

first choice.

Brief Overview of Documents for New Users

Architecture-independent information:

•“Training - Debugger Basics” (training_debugger.pdf): Get familiar with the basic features of a

TRACE32 debugger.

•“T32Start” (app_t32start.pdf): T32Start assists you in starting TRACE32 PowerView instances

for different configurations of the debugger. T32Start is only available for Windows.

•“General Commands” (general_ref_<x>.pdf): Alphabetic list of debug commands.

Architecture-specific information:

•“Processor Architecture Manuals”: These manuals describe commands that are specific for the

processor architecture supported by your debug cable. To access the manual for your processor

architecture, proceed as follows:

- Choose Help menu > Processor Architecture Manual.

• To get started with the most important manuals, use the Welcome to TRACE32! dialog

(WELCOME.view):

dsPIC33 Debugger | 7

Demo and Start-up Scripts

To search for PRACTICE scripts, do one of the following in TRACE32 PowerView:

• Type at the command line: WELCOME.SCRIPTS

• or choose File menu > Search for Script.

You can now search the demo folder and its subdirectories for PRACTICE start-up scripts

(*.cmm) and other demo software:

You can also inspect the demo folder manually in the system directory of TRACE32.

The ~~/demo/pic/ folder contains:

flash/ Scripts for target based programming and example declarations for

internal flash.

hardware/ Ready-to-run debugging and flash programming demos for

evaluation boards. Recommended for getting started!

dsPIC33 Debugger | 8

Configuration

System Overview

Example configuration for a single core debugger.

Please consider the tips given in the chapter “Connector Type and Pinout”, page 26.



POWER DEBUG USB INTERFACE / USB 3

POWER DEBUG INTERFACE / USB 3

PC or

Workstation

USB

Cable

Target

Debug

Connector

Debug Cable

dsPIC33 Debugger | 9

Quick Start

Start a New Debug Session

Starting up the debugger is done as follows:

1. Select the device prompt B (BDM debugger) and reset TRACE32.

The device prompt B:: is normally already selected in the TRACE32 command line. If this is not the

case, enter B:: to set the correct device prompt. The RESet command is only necessary if you do

not start directly after booting the TRACE32 development tool.

2. Specify the CPU specific settings.

This command selects the CPU type. In case the exact type of CPU is not known, the command

SYStem.DETECT.CPU can be used to detect the connected target.

3. Reset the target and enter debug mode.

This command resets the CPU on the target, enables On-Chip-Debug Mode and halts at address

0x0.The CPU stops executing any instruction, and the user is able to download and test the code.

After this command is executed, it is possible to access memory and registers.

If this command results in an error, the target might not be prepared for debugging with TRACE32. In

this case use following command to prepare the target before entering the debug mode.

If the CPU DSPIC33XXXX is selected, TRACE32 tries to detect the CPU type of the connected target

before the system is brought up.

4. Load the program into the program memory.

B::

RESet

SYStem.CPU DSPIC33CH128MP508

SYStem.Mode Up

FLASH.UNSECUREerase

DO ~~/demo/pic/flash/dspic33cxxxx.cmm

dsPIC33 Debugger | 10

A typical start sequence of the PIC is shown below. This sequence can be written to a PRACTICE script file

(*.cmm, ASCII format) and executed with the command DO <file>.

*) These commands open windows on the screen. The window position can be specified with the WinPOS

command.

Programming a Productive Application Binary

To write an application where the debug access is disabled to the program memory, a different approach

must be used.

1. Select the device prompt B (BDM debugger) and reset TRACE32.

B:: ; Select the ICD device prompt

RESet ; Reset the TRACE32 software

WinCLEAR ; Clear all windows

SYStem.Up ; Reset the target and enter debug mode

~~/demo/pic/flash/<script>.cm

; Load the target application with the

; family specific script

; Set the stack pointer to address 8000

PER.view ; Show clearly arranged peripherals

; in window *)

List.Mix ; Open source code window *)

Frame.view /Locals /Caller ; Open the stack frame with

; local variables *)

Var.Watch %SpotLight flags ast ; Open watch window for variables *)

Break.Set 0x101000 /Program

/Onchip

; Set on-chip breakpoint

; to address 101000

NOTE: Due to the architecture of the dsPIC33 microcontroller, the on-chip breakpoints

halt the target two instructions after the program counter (PC) reached the

address of an on-chip breakpoint. This is called skid.

B::

RESet

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