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When the application is written in assembly language, it is sometimes necessary to analyse the accesses to some of the microcontroller’s registers. A Register Break Point uses a trigger to detect the access to a register. A Mask Register should be used when the register is composed of several fields, since it can apply a mask and test specific bits only.

An application in certain operating conditions may occasionally try to access to invalid or protected memory regions. Using a range breakpoint, it is possible to detect the occurrence of these events. It is thus possible to suspend the execution of the application on the occurrence of:

- Write to flash;

- Invalid access to memory;

- Access to an instruction in invalid program space;

- Access to data in invalid data space.

The hardware breakpoint properties are established through different fields. The action to make when all triggers are true can be defined in the Action option of the Hardware Configuration field. One of the following options can be chosen:

- Halt;

- Trigger storage;

- Halt and trigger storage.

In the trigger field, specify through various options, the check condition for a true trigger. The trigger can be:

- Memory Address bus;

- Memory Data bus;

- Register Write.

Depending on the type of trigger chosen, the options to specify may be

Memory address bus

Location: Address of the program code line or data memory address (e.g.:&a);

Mask : the information introduced in this field is used in a logic AND operation with the contents;

Operator : Logic operation with the data (==,<=,>=, !=);

Access : Memory access type:

- Instruction fetch;

- Instruction fetch and hold trigger;

- No instruction fetch;

- Don’t care;

- No Instruction fetch and read;

- No instruction fetch and write;

- Read;

- Write;

- No instruction fetch and no DMA access;

- DMA access (read or write);

- No DMA access;

- Write and no DMA access;

- No instruction fetch and read and no DMA access;

- Read and no DMA access;

- Read and DMA access;

- Write and DMA access.

Memory data bus

Value : A mask and compare will be applied to the data on the bus and to value added here, to determine if the trigger is true;

Mask : The information introduced in this field is used in a logic AND operation with the contents;

Operator : Logic operation with the data (==,<=,>=, !=);

Access : Memory access type (on Memory Address Bus).

Miscellaneous

Group : Group to which the breakpoint belongs;

Name : Name assigned to the breakpoint.

There is a predefined breakpoint that can be set to

- Break in program range : Generates a suspension of the execution of the application in a range of program memory addresses. It uses two triggers that define the range of addresses;

- Break in DMA transfer : Generates the suspension of the execution of the application, whenever a DMA read or write operation at the specified program address occurs. This breakpoint is implemented using only one trigger;

- Break in DMA transfer range : Generates the suspension of the execution of the application, whenever a DMA read or write operation at the specified address range occurs. This breakpoint is implemented using two triggers;

Questions & Answers

Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
hi
Loga
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Teaching and classroom laboratories based on the “ez430” and "experimenter's board" msp430 microcontroller platforms and code composer essentials. OpenStax CNX. May 19, 2009 Download for free at http://cnx.org/content/col10706/1.3
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