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This module describes the basics of the TI DSP/BIOS LOG module.

Introduction

This module describes the basics of the TI DSP/BIOS LOG module.

Reading

  • SPRU423 TMS320 DSP/BIOS Users Guide: Read the section Event Log Manager (LOG Module)

Log module

When running a real-time application it is desirable to not interrupt the processing while attempting to monitor or debug code. Printing to the standard I/O is very time consuming on the processor. The LOG module helps reduce this time. Formatting of the display takes place on the host computer rather than on the DSP. Data is stored in real-time to a buffer on the DSP and then during idle time it is transferred to the host computer. On the host computer the print statements are formatted and displayed.

The main functions used in the LOG module are LOG_printf and LOG_printf4 . They work very similar to the C printf function. In order to print using the LOG module a LOG object must be defined. To create a new LOG object open the configuration file and right click on Instrumentation->LOG and select Insert LOG . This will create a LOG object called LOG0 . The name of the object can be changed. On the properties window for the object the buffer length is in words and sets the length of the buffer. The buffer can be either a circular buffer, which contains the last messages written to the object, or fixed, which contains the first messages written to the buffer. A circular buffer allows messages to be sent continually. Each message writes 4 words of data. The format of the function call is

LOG_printf(LOG_Obj *log,String format,arg0,arg1) LOG_printf4(LOG_Obj *log,String format,arg0,arg1,arg2,arg3);

where the String format is a usual C printf format string with the conversion characters given in Table 1.

Conversion Character Description
%d Signed integer
%x Unsigned hexadecimal integer
%u Unsigned integer
%o Unsigned octal integer
%s Character string. This character can only be used with constant string pointers.
%r Symbol from symbol table
%p pointer

When using objects defined with the configuration tool the code must include definitions of the objects and the header file log.h . The configuration tool generates a header file that contains the definitions. For instance, the file log.tcf would generate the file logcfg.h . If an object called LOG0 was created, then the file would contain

extern far LOG_Obj LOG0;

Include the configuration header file in your code and you won't need to make the definitions yourself. A call the the print function might look like this

LOG_printf(&LOG0,"Hello world");

To view the message log select Tools->RTA->Printf Logs .

Questions & Answers

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
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
Got questions? Join the online conversation and get instant answers!
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Source:  OpenStax, Ti dsp/bios lab. OpenStax CNX. Sep 03, 2013 Download for free at http://cnx.org/content/col11265/1.8
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